Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA Application
CPST Ref: 41665/00002
1 METHOD AND APPARATUS FOR CONTROLLING AIR
2 CONDITIONING UNIT, ELECTRONIC DEVICE, AND READABLE
3 STORAGE MEDIUM
4 CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] This application claims priorities to Chinese Patent Application No.
202111453483.7
6 filed on December 01, 2021 and entitled "METHOD AND APPARATUS FOR
CONTROLLING
7 AIR CONDITIONING UNIT, ELECTRONIC DEVICE, AND READABLE STORAGE
8 M EDI UM ," the entire disclosure of which is incorporated herein by
reference.
9 FIELD
[0002] The present disclosure relates to the technical field of
compressors, and more
11 particular, to a method and apparatus for controlling an air
conditioning unit, an electronic device,
12 and a readable storage medium.
13 BACKGROUND
14 [0003] At present, a multi-compressor water chilling (heat pump) unit
in the industry is
typically composed of a plurality of air conditioners of a same model or a
same specification.
16 This design can allow the unit to control each compressor in a simple
manner. A typical method
17 for controlling the air conditioning unit is to approximately consider
that for compressors (not all
18 compressors) that are operating, each compressor has a same
refrigerating capacity and operation
19 efficiency according to a principle of equal power or current. When
loading the unit, each
compressor is loaded with a same power ratio or a same current ratio until a
power or current of
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1 the operating compressor reaches its full capacity, and then the unloaded
compressors are started.
2 Similarly, when unloading the unit, each compressor is unloaded (reduced)
by an equal power or
3 current until a minimum refrigerating capacity limit of the compressor
has been reached, at
4 which point one of the operating compressors is closed.
[0004] However, two obvious defects occur in the above method for
controlling the air
6 conditioning unit described above. First, when a plurality of compressors
employed by a water
7 chilling (heat pump) unit has different models and specifications, this
control method cannot well
8 perform refrigerating capacity distribution of each compressor and
determination of an increase
9 or decrease in the number of compressors in operation. Second, although
the related control
method may allow a refrigerating capacity of the unit to satisfy requirements
of a user's water
11 system by adjusting an operation parameter of the compressor, this
control method lacks a basis
12 on a principle of optimal compressor efficiency, resulting in poor
energy efficiency of the air
13 conditioning unit.
14 SUMMARY
[0005] In view of this, the present disclosure provides a method and
apparatus for controlling
16 method an air conditioning unit, an electronic device, and a readable
storage medium, to at least
17 adapt to a situation where various compressors in the air conditioning
unit have different types
18 and specifications. Moreover, energy efficiency of the air conditioning
unit can be improved.
19 [0006] According to some embodiments of the present disclosure,
provided is a method for
controlling an air conditioning unit. The method is applied in the air
conditioning unit. The air
21 conditioning unit may include a plurality of compressors. The method may
include: determining
22 a load adjustment target value of the air conditioning unit; obtaining
an operation condition
23 parameter of each of the plurality of compressors, and calculating first
optimal efficiency and a
24 first workload of each of the plurality of compressors based on the
operation condition parameter,
in which a maximum of the first workload represents a maximum refrigerating
capacity or a
26 maximum heating capacity of the compressor at the first optimal
efficiency, and a minimum of
2
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1 the first workload represents a minimum refrigerating capacity or a
minimum heating capacity of
2 the compressor at the first optimal efficiency; obtaining second optimal
efficiency and a second
3 workload of the air conditioning unit by performing cross-permutation and
combination
4 calculation on the first optimal efficiency and the first workload of
each of the plurality of
compressors, in which a maximum of the second workload represents a maximum
refrigerating
6 capacity or a maximum heating capacity of the air conditioning unit at
the second optimal
7 efficiency, and a minimum of the second workload represents a minimum
refrigerating capacity
8 or a minimum heating capacity of the air conditioning unit at the first
optimal efficiency;
9 determining target optimal efficiency and a target workload from the
second optimal efficiency
and the second workload of the air conditioning unit based on the load
adjustment target value;
11 and controlling, based on the target optimal efficiency and the target
workload, the air
12 conditioning unit to perform a refrigeration operation or a heating
operation.
13 [0007] In some embodiments of the present disclosure, the air
conditioning unit may include
14 a controller of the air conditioning unit, the plurality of compressors,
a sensor of the plurality of
compressors, a controller of the plurality of compressors, and an actuator of
the plurality of
16 compressors.
17 [0008] In some embodiments of the present disclosure, said
determining the load adjustment
18 target value of the air conditioning unit may include: determining, by
the controller of the air
19 conditioning unit, the load adjustment target value of the air
conditioning unit based on a target
water temperature and a change curve of a current water temperature.
21 [0009] In some embodiments of the present disclosure, said obtaining
the operation condition
22 parameter of each of the plurality of compressors may include:
obtaining, by the sensor of the
23 plurality of compressors, the operation condition parameter of the
compressor.
24 [0010] In some embodiments of the present disclosure, the controller
of the compressor has a
performance database pre-stored thereon. The performance database may include
a
26 correspondence between the operation condition parameter of the
compressor and the first
27 optimal efficiency and the first workload of the compressor. Said
calculating the first optimal
28 efficiency and the first workload of each of the plurality of
compressors based on the operation
3
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1 condition parameter may include: inputting the operation condition
parameter into the
2 performance database and outputting the first optimal efficiency and the
first workload of the
3 compressor.
4 [0011] In some embodiments of the present disclosure, said obtaining
the second optimal
efficiency and the second workload of the air conditioning unit by performing
cross-permutation
6 and combination calculation on the first optimal efficiency and the first
workload of each of the
7 plurality of compressors may include: performing, by the controller of
the air conditioning unit,
8 the cross-permutation and combination calculation on the first optimal
efficiency and the first
9 workload of each of the plurality of compressors to obtain the second
optimal efficiency and the
second workload of the air conditioning unit.
11 [0012] In some embodiments of the present disclosure, said
determining the target optimal
12 efficiency and the target workload from the second optimal efficiency
and the second workload
13 of the air conditioning unit based on the load adjustment target value
may include: determining
14 third optimal efficiency and a third workload from the second optimal
efficiency and the second
workload of the air conditioning unit, in which a minimum of the third
workload is smaller than
16 the load adjustment target value, and the load adjustment target value
is smaller than a maximum
17 of the third workload; and determining a maximum of the third optimal
efficiency as the target
18 optimal efficiency and a third workload corresponding to the target
optimal efficiency as the
19 target workload.
[0013] In some embodiments of the present disclosure, the maximum of the
third optimal
21 efficiency corresponds to a plurality of third workloads. Said
determining the third workload
22 corresponding to the target optimal efficiency as the target workload
may include: determining a
23 compressor operation time corresponding to the plurality of third
workloads corresponding to the
24 maximum of the third optimal efficiency; and determining one of the
plurality of third workloads
corresponding to a minimum of the compressor operation time as the target
workload.
26 [0014] In some embodiments of the present disclosure, said
determining the target optimal
27 efficiency and the target workload from the second optimal efficiency
and the second workload
28 of the air conditioning unit based on the load adjustment target value
may include: calculating,
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1 when there is no third workload, a difference between the minimum of the
second workload and
2 the load adjustment target value; determining a second workload
corresponding to a minimum of
3 the difference as the target workload; and determining second optimal
efficiency corresponding
4 to the target workload as the target optimal efficiency.
[0015] In some embodiments of the present disclosure, said controlling,
based on the target
6 optimal efficiency and the target workload, the air conditioning unit to
perform the refrigeration
7 operation or heating operation may include: controlling the actuator of
the compressor based on
8 the target optimal efficiency and the target workload, to allow each of
the plurality of
9 compressors to perform the refrigeration operation or heating operation.
[0016] In some embodiments of the present disclosure, the air conditioning
unit is a water
11 chilling unit or a heat pump unit.
12 [0017] According to other embodiments of the present disclosure,
further provided is an
13 apparatus for controlling an air conditioning unit. The apparatus is
applied in the air conditioning
14 unit. The air conditioning unit may include a plurality of compressors.
The apparatus may
include: a load adjustment target value determination module configured to
determine a load
16 adjustment target value of the air conditioning unit; a first optimal
efficiency and first workload
17 calculation module configured to obtain an operation condition parameter
of each of the plurality
18 of compressors and calculate first optimal efficiency and a first
workload of each of the plurality
19 of compressors based on the operation condition parameter, in which a
maximum of the first
workload represents a maximum refrigerating capacity or a maximum heating
capacity of the
21 compressor at the first optimal efficiency, and a minimum of the first
workload represents a
22 minimum refrigerating capacity or a minimum heating capacity of the
compressor at the first
23 optimal efficiency; a second optimal efficiency and second workload
calculation module
24 configured to obtain second optimal efficiency and a second workload of
the air conditioning
unit by performing cross-permutation and combination calculation on the first
optimal efficiency
26 and the first workload of each of the plurality of compressors, in which
a maximum of the
27 second workload represents a maximum refrigerating capacity or a maximum
heating capacity of
28 the air conditioning unit at the second optimal efficiency, and a
minimum of the second workload
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1 represents a minimum refrigerating capacity or a minimum heating capacity
of the air
2 conditioning unit at the first optimal efficiency; a target optimal
efficiency and target workload
3 calculation module configured to determine target optimal efficiency and
a target workload from
4 the second optimal efficiency and the second workload of the air
conditioning unit based on the
load adjustment target value; and an air conditioning unit operation module
configured to control,
6 based on the target optimal efficiency and the target workload, the air
conditioning unit to
7 perform a refrigeration operation or a heating operation.
8 [0018] In some embodiments of the present disclosure, the air
conditioning unit may include
9 a controller of the air conditioning unit, the plurality of compressors,
a sensor of the plurality of
compressors, a controller of the plurality of compressors, and an actuator of
the plurality of
11 compressors.
12 [0019] In some embodiments of the present disclosure, the load
adjustment target value
13 determination module may be further configured to determine, by the
controller of the air
14 conditioning unit to determine, based on a target water temperature and
a change curve of a
current water temperature, the load adjustment target value of the air
conditioning unit.
16 [0020] In some embodiments of the present disclosure, the first
optimal efficiency and first
17 workload calculation module may be configured to obtain, by the sensor
of the plurality of
18 compressors, the operation condition parameter of the compressor.
19 [0021] In some embodiments of the present disclosure, the controller
of the compressor may
have a performance database pre-stored thereon. The performance database may
include a
21 correspondence between the operation condition parameter of the
compressor and the first
22 optimal efficiency and the first workload of the compressor. The first
optimal efficiency and first
23 workload calculation module may be further configured to input the
operation condition
24 parameter into the performance database and output the first optimal
efficiency and the first
workload of the compressor.
26 [0022] In some embodiments of the present disclosure, the second
optimal efficiency and
27 second workload calculation module may be further configured to perform,
by the controller of
28 the air conditioning unit, the cross-permutation and combination
calculation on the first optimal
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1 efficiency and the first workload of each of the plurality of compressors
to obtain the second
2 optimal efficiency and the second workload of the air conditioning unit.
3 [0023] In some embodiments of the present disclosure, the target
optimal efficiency and
4 target workload calculation module may be further configured to:
determine third optimal
efficiency and a third workload from the second optimal efficiency and the
second workload of
6 the air conditioning unit, in which a minimum of the third workload is
smaller than the load
7 adjustment target value, and the load adjustment target value is smaller
than a maximum of the
8 third workload; and determine a maximum of the third optimal efficiency
as the target optimal
9 efficiency and a third workload corresponding to the target optimal
efficiency as the target
workload.
11 [0024] According to yet another embodiment of the present disclosure,
provided is an
12 electronic device. The electronic device includes a processor and a
memory. The memory has
13 computer-executable instructions stored thereon. The computer-executable
instruction is
14 executable by the processor. The processor is configured to implement,
when executing the
computer-executable instruction, the method for controlling the air
conditioning unit as described
16 above.
17 [0025] According to still yet another embodiment of the present
disclosure, provided is a
18 computer-readable storage medium. The computer-readable storage medium
has computer-
19 executable instructions thereon. The computer-executable instruction,
when invoked and
executed by a processor, causes the processor to implement the method for
controlling the air
21 conditioning unit as described above.
22 BRIEF DESCRIPTION OF THE DRAWINGS
23 [0026] In order to clearly explain technical solutions according to
the specific
24 implementations of the present disclosure or in the related art,
drawings used in the description
of the specific implementations or the related art are briefly introduced
below. Obviously, the
26 drawings described below are merely some implementations of the present
disclosure. Based on
7
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1 these drawings, other drawings can be obtained by those skilled in the
art without creative effort.
2 [0027] FIG. 1 is a schematic diagram of a dual-compressor water-cooled
water chilling (heat
3 pump) unit system according to some embodiments of the present
disclosure.
4 [0028] FIG. 2 is a flowchart of a method for controlling an air
conditioning unit according to
some embodiments of the present disclosure.
6 [0029] FIG. 3 is a flowchart of another method for controlling an air
conditioning unit
7 according to some embodiments of the present disclosure.
8 [0030] FIG. 4 is a schematic diagram of a principle of a control
system for an air
9 conditioning unit according to some embodiments of the present
disclosure.
[0031] FIG. 5 is a logical schematic diagram of a method for controlling an
air conditioning
11 unit according to some embodiments of the present disclosure.
12 [0032] FIG. 6 is a schematic diagram of a compressor performance
database and an
13 operation principle according to some embodiments of the present
disclosure.
14 [0033] FIG. 7 is a schematic structural diagram of an apparatus for
controlling an air
conditioning unit according to some embodiments of the present disclosure.
16 [0034] FIG. 8 is a schematic structural diagram of an electronic
device according to some
17 embodiments of the present disclosure.
18 DETAILED DESCRIPTION OF THE EMBODIMENTS
19 [0035] In order to make the objects, technical solutions, and
advantages of the present
disclosure more apparent, technical solutions of the present disclosure will
be clearly and
21 completely described below in combination with accompanying drawings.
Obviously, the
22 embodiments described below are only a part of the embodiments of the
present disclosure,
23 rather than all of the embodiments. Based on the embodiments of the
present disclosure, other
24 embodiments obtained by those of ordinary skill in the art without
creative labor shall fall within
the scope of the present disclosure.
26 [0036] At present, referring to a schematic diagram of a dual-
compressor water-cooled water
8
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1 chilling (heat pump) unit system, a multi-compressor water chilling (heat
pump) unit in the
2 industry is generally composed of a plurality of air conditioners of a
same model or a same
3 specification, that is, a compressor 1 and a compressor 2 in FIG. 1 have
the same model and
4 specification. This design can allow the unit to control each of the
plurality of compressors in a
simple manner. A typical method for controlling the air conditioning unit in
the industry is to
6 approximately consider that for compressors (not all compressors) that
are operating, each
7 compressor has a same refrigerating capacity and operation efficiency
according to a principle of
8 equal power or current. When loading the unit, each compressor is loaded
with a same power
9 ratio or a same current ratio until a power or current of the operating
compressor reaches its full
capacity, and then the unloaded compressors are started. Similarly, when
unloading the unit, each
11 compressor is unloaded (reduced) by an equal power or current until a
minimum refrigerating
12 capacity limit of the compressor has been reached, at which point one of
the operating
13 compressors is closed.
14 [0037] However, two obvious defects occur in the above method for
controlling the air
conditioning unit described above. First, when a plurality of compressors
employed by a water
16 chilling (heat pump) unit has different models and specifications, this
control method cannot well
17 perform refrigerating capacity distribution of each compressor and
determination of an increase
18 or decrease in the number of compressors in operation. Second, although
the related control
19 method may allow a refrigerating capacity of the unit to satisfy
requirements of a user's water
system by adjusting an operation parameter of the compressor, this control
method lacks a basis
21 on a principle of optimal compressor efficiency, resulting in poor
energy efficiency of the air
22 conditioning unit. Based on this, the embodiments of the present
disclosure provide a method
23 and apparatus for controlling an air conditioning unit, an electronic
device, and a readable
24 storage medium, and specifically relate to an optimal energy efficiency
method for controlling
the multi-compressor water chilling (heat pump) unit.
26 [0038] In order to facilitate understanding of the embodiments,
firstly, a method for
27 controlling an air conditioning unit according to the embodiments of the
present disclosure will
28 be described below in detail.
9
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1 [0039] The method for controlling the air conditioning unit according
to the embodiments of
2 the present disclosure will be described in detail below with reference
to the accompanying
3 drawings.
4 [0040] An embodiment of the present disclosure provides a method for
controlling an air
conditioning unit. The method is applied in the air conditioning unit. The air
conditioning unit
6 may include a plurality of compressors. FIG. 2 shows a flowchart of a
method for controlling an
7 air conditioning unit. As illustrated in FIG. 2, the method for
controlling the air conditioning unit
8 may include operations at blocks S202 to S210.
9 [0041] At block S202, a load adjustment target value of the air
conditioning unit is
determined.
11 [0042] The air conditioning unit according to the embodiments of the
present disclosure may
12 include the plurality of compressors. The compressors may have a same
model or a same
13 specification, or may have different models and specifications. The
compressors may be used for
14 refrigerating or heating. Correspondingly, the above air conditioning
unit may be a water chilling
unit or a heat pump unit.
16 [0043] In addition, the load adjustment target value of the air
conditioning unit may be
17 understood as a user's desired refrigerating capacity or heating
capacity of the air conditioning
18 unit during its operation. The user may input a target water
temperature. The load adjustment
19 target value of the air conditioning unit may be calculated based on the
target water temperature
inputted by the user.
21 [0044] At block S204, an operation condition parameter of each of the
plurality of
22 compressors is obtained, and first optimal efficiency and a first
workload of each of the plurality
23 of compressors are calculated based on the operation condition
parameter.
24 [0045] In addition, the operation condition parameter of the
compressor may include
parameters such as a temperature, humidity, and current of the compressor. A
maximum of the
26 first workload represents a maximum refrigerating capacity or a maximum
heating capacity of
27 the compressor at the first optimal efficiency. A minimum of the first
workload represents a
28 minimum refrigerating capacity or a minimum heating capacity of the
compressor at the first
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1 optimal efficiency.
2 [0046] At block S206, second optimal efficiency and a second workload
of the air
3 conditioning unit are obtained by performing cross-permutation and
combination calculation on
4 the first optimal efficiency and the first workload of each of the
plurality of compressors.
[0047] In addition, a maximum of the second workload represents a maximum
refrigerating
6 capacity or a maximum heating capacity of the air conditioning unit at
the second optimal
7 efficiency. A minimum of the second workload represents a minimum
refrigerating capacity or a
8 minimum heating capacity of the air conditioning unit at the first
optimal efficiency.
9 [0048] After the first optimal efficiency and the first workload of
each of the plurality of
compressors are determined, permutation and combination may be performed on
the first optimal
11 efficiency and the first workload of each of the plurality of
compressors in various manners, to
12 obtain the second optimal efficiency and the second workload of the air
conditioning unit.
13 [0049] At block S208, target optimal efficiency and a target workload
are determined from
14 the second optimal efficiency and the second workload of the air
conditioning unit based on the
load adjustment target value.
16 [0050] Based on a predetermined screening rule, one best efficiency
and one best workload
17 may be determined from the second optimal efficiency and the second
workload of each of the
18 plurality of air conditioning units based on the load adjustment target
value, and the best
19 efficiency and the best workload are referred to as the target optimal
efficiency and the target
workload. The above-mentioned screening rule may be set based on an optimal
efficiency
21 principle of the compressor. In this way, a control strategy for multi-
compressor refrigerating
22 capacity distribution and compressor number addition and reduction is
carried out. Therefore, the
23 compressor can be at the optimal efficiency, and the air conditioning
unit can be at optimal
24 energy efficiency.
[0051] At block S210, the air conditioning unit is controlled based on the
target optimal
26 efficiency and the target workload to perform a refrigeration operation
or a heating operation.
27 [0052] After the target optimal efficiency and the target workload
are determined, it is
28 possible to control, based on the target optimal efficiency and the
target workload, the
11
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1 compressor in the air conditioning unit to operate or close, to control
the air conditioning unit to
2 perform a refrigeration operation or a heating operation.
3 [0053] According to the method and apparatus for controlling the air
conditioning unit, the
4 electronic device, and the readable storage medium according to the
embodiments of the present
disclosure, the first optimal efficiency and the first workload of each
compressor are calculated
6 based on the operation condition parameter. The second optimal efficiency
and the second
7 workload of the air conditioning unit are determined based on the first
optimal efficiency and the
8 first workload of each compressor. The target optimal efficiency and the
target workload are
9 determined from the second optimal efficiency and the second workload.
Moreover, the air
conditioning unit is controlled, based on the target optimal efficiency and
the target workload, to
11 perform a refrigeration operation or a heating operation.
12 [0054] Another method for controlling the air conditioning unit
according to the
13 embodiments of the present disclosure will be described in detail below
with reference to the
14 accompanying drawings.
[0055] This embodiment provides another method for controlling the air
conditioning unit.
16 The method is implemented on the basis of the above embodiments and
focuses on descriptions
17 for specific implementation steps of determining the target optimal
efficiency and the target
18 workload from the second optimal efficiency and the second workload of
each of the plurality of
19 air conditioning units based on the load adjustment target value. A
flowchart of another method
for controlling the air conditioning unit is illustrated in FIG. 3. As
illustrated in FIG. 3, the
21 method for controlling the air conditioning unit in this embodiment
includes operation at block
22 S302.
23 [0056] At block S302, a load adjustment target value of the air
conditioning unit is
24 determined.
[0057] In some embodiments, the air conditioning unit may include a
controller of the air
26 conditioning unit (also referred to as a unit controller), a plurality
of compressors, a sensor of the
27 plurality of compressors, a controller of the plurality of compressors,
and an actuator of the
28 plurality of compressors. FIG. 4 illustrates a schematic diagram of a
principle of a control system
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1 for an air conditioning unit. Referring to FIG. 4, the air conditioning
unit in FIG. 4 includes n
2 compressors. Each of the n compressors correspondingly has a controller,
an actuator, and a
3 sensor. The controller of the air conditioning unit is in a communication
connection with the
4 controller of each of then compressors.
[0058] In addition, a sensor of a first compressor to nth compressor may
collect parameters
6 such as a pressure, a temperature, and a current. An actuator of the
first compressor to the nth
7 compressor may perform compressor capacity adjustment and compressor
rotational speed
8 adjustment. A controller of the first compressor to the nth compressor
has stored thereon a
9 database or a mathematical model (function, equation, association, or the
like) between a
refrigerating (heating) capacity and efficiency and actuator action parameters
of the respective
11 compressor in different operation conditions.
12 [0059] In addition, when the compressors have the same model and
specification or the
13 number of compressors is small, it is possible to dispense with the
compressor controller. Instead,
14 all of correlation relationships among functions, software, and
databases of the compressor
controller and the sensor and actuator of the compressor are integrated into
the unit controller. In
16 addition, all of correlation relationships among functions, software and
databases of the unit
17 controller and a sensor and actuator of the unit actuator are integrated
into the compressor
18 controller. Therefore, the unit controller can be removed.
19 [0060] In some embodiments, the load adjustment target value of the
air conditioning unit
may be determined by the controller of the air conditioning unit based on a
target water
21 temperature and a change curve of a current water temperature.
22 [0061] FIG. 5 shows a logical schematic diagram of a method for
controlling an air
23 conditioning unit. Referring to FIG. 5, the unit controller may
calculate a load adjustment target
24 value of unit refrigeration (heating) based on a target water
temperature set by the user and a
change curve of a current actual water temperature.
26 [0062] At block S304, an operation condition parameter of each of the
plurality of
27 compressors is obtained. First optimal efficiency and a first workload
of each of the plurality of
28 compressors are calculated based on the operation condition parameter.
13
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1 [0063] In some embodiments, the sensor of the plurality of compressors
may obtain the
2 operation condition parameter of the compressor. The controller of the
compressor may input the
3 operation condition parameter into the performance database to output the
first optimal
4 efficiency and the first workload of the compressor.
[0064] As illustrated in FIG. 5, the controller of the first compressor to
the nth compressor
6 can obtain the operation condition parameter of the compressor by
calculating parameters
7 collected by the corresponding sensor and actuator. Since the performance
database is pre-stored
8 by the controller of the compressor, based on an actual operation
condition parameter of the
9 compressor as an input, the optimal efficiency of the compressor and a
maximum refrigerating
(heating) capacity and a minimum refrigerating (heating) capacity of the
compressor at the
11 optimal efficiency are calculated according to the performance database
in the compressor
12 controller, i.e., the first optimal efficiency and the first workload.
13 [0065] In addition, reference may be made to a schematic diagram of a
compressor
14 performance database and an operation principle illustrated in FIG. 6.
As illustrated in FIG. 6,
the compressor may operate between the maximum of the first workload and the
minimum of the
16 first workload at the optimal efficiency.
17 [0066] At block S306, second optimal efficiency and a second workload
of the air
18 conditioning unit are obtained by performing cross-permutation and
combination calculation on
19 the first optimal efficiency and the first workload of each of the
plurality of compressors.
[0067] In some embodiments, the controller of the air conditioning unit may
obtain the
21 second optimal efficiency and the second workload of the air
conditioning unit by performing
22 cross-permutation and combination calculation on the first optimal
efficiency and the first
23 workload of each of the plurality of compressors.
24 [0068] As illustrated in FIG. 5, after the unit controller receives
the optimal efficiency and
the maximum refrigerating (heating) capacity and minimum refrigerating
(heating) capacity
26 uploaded by the controller of each compressor, the cross-permutation and
combination
27 calculation is performed on numbers and serial numbers of compressors
that are operating, to
28 obtain optimal unit efficiency and a maximum refrigerating (heating)
capacity and minimum
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1 refrigerating (heating) capacity at the optimal unit efficiency under
various operation
2 combination of the compressors.
3 [0069] In addition, the above cross-permutation and combination may be
a weighted
4 calculation. For example, first optimal efficiency of the first
compressor is 85%, and a first
workload of the first compressor is 500-700, so a weight is 83%; first optimal
efficiency of a
6 second compressor is 83%, and a first workload of the second compressor
is 200-4700, so a
7 weight is 300. Therefore, it is possible to obtain that the second
optimal efficiency of the air
8 conditioning unit = (85% x 600 +83% x 300)/900 = 84.33%, the minimum of
the second
9 workload = (500 x 600 +200 x 300)/900=400, and the maximum of the second
workload= (500
x 700 +200 x 2700)/900=988.89.
11 [0070] At block S308, third optimal efficiency and a third workload
are determined from the
12 second optimal efficiency and the second workload of the air
conditioning unit. A minimum of
13 the third workload is smaller than the load adjustment target value.
Moreover, the load
14 adjustment target value is smaller than a maximum of the third workload;
and
[0071] At block S310, a maximum of the third optimal efficiency is
determined as the target
16 optimal efficiency. Moreover, a third workload corresponding to the
target optimal efficiency is
17 determined as the target workload.
18 [0072] The embodiments of the present disclosure may provide a manner
of multi-level
19 screening of the target workload. In a first-level condition screening,
only a compressor
operation combination (i.e., the third optimal efficiency and the third
workload) is remained in
21 which a minimum refrigerating (heating) capacity at the unit optimal
efficiency < the load
22 adjustment target value of the unit < a maximum refrigerating (heating)
capacity at the unit
23 optimal efficiency, and then sorting is performed from a high efficiency
value to a low optimal
24 efficiency value of the unit. Finally, the highest optimal efficiency is
an optimal solution of an
optimal method for controlling unit energy efficiency.
26 [0073] When the optimal solution of the first-level condition
screening is not unique (i.e., the
27 maximum of the third optimal efficiency corresponds to a plurality of
third workloads), a second-
28 level condition screening is carried out. In the second-level condition
screening, a compressor
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1 operation time corresponding to the plurality of third workloads
corresponding to the maximum
2 of the third optimal efficiency is determined, and one of the plurality
of third workloads
3 corresponding to a minimum of the compressor operation time is determined
as the target
4 workload. When there are two or more optimal solutions, a screening
condition is an operation
combination with a "minimum" operation duration of the compressor, thereby
ensuring a
6 balanced service life of each compressor.
7 [0074] When the optimal solution of the first-level condition
screening is 0 (i.e., there is no
8 third workload), the second-level condition screening is further
performed. In the second-level
9 condition screening, when there is no third workload, a difference
between the minimum of the
second workload and the load adjustment target value is calculated. A second
workload
11 corresponding to a minimum of the difference is determined as the target
workload. Second
12 optimal efficiency corresponding to the target workload is determined as
the target optimal
13 efficiency.
14 [0075] When the optimal solution is 0, in order to ensure the user's
refrigerating (heating)
capacity demand, an operation combination is performed in which the load
adjustment target
16 value of the unit is smaller than the minimum refrigerating (heating)
capacity at the optimal
17 efficiency of the unit and the minimum refrigerating (heating) capacity
at the optimal efficiency
18 of the unit minus an overall target value of unit load adjustment is
equal to minimum min.
19 [0076] At block S312, the air conditioning unit is controlled based
on the target optimal
efficiency and the target workload to perform the refrigeration operation or
the heating operation.
21 [0077] In some embodiments, the actuator of the compressor may be
controlled based on the
22 target optimal efficiency and the target workload, to allow each of the
plurality of compressors to
23 perform the refrigeration operation or the heating operation.
24 [0078] Generally, when the compressor operates in its optimal
efficiency interval, the
compressor operates with good reliability and safety. In this way, stability
of the unit is improved,
26 and a risk of compressor failure is lowered. Therefore, the method
according to the embodiments
27 of the present disclosure can not only improve operation energy
efficiency of the unit and
28 achieve energy conservation and emission reduction, but also improve
stability of the unit and
16
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1 reduce the risk of failure of the compressor.
2 [0079] In the method according to the embodiments of the present
disclosure, for the multi-
3 compressor water chilling (heat pump) unit, regardless of whether the
model and specification
4 and the performance characteristics of the plurality of compressors in
the air conditioning unit
are the same, the refrigerating capacity that should be reached by each
compressor may be well
6 calculated and allocated. Moreover, it is possible to perform control on
an increase and decrease
7 in the number of compressors in operation.
8 [0080] In the method according to the embodiments of the present
disclosure, the
9 permutation and combination calculation of various compressors at the
optimal efficiency may
be performed, and the optimal solution may be determined on the premise of
satisfying the user's
11 requirements of the refrigeration (heating) capacity based on the actual
operation condition of
12 each compressor. In this way, the multi-compressor water chilling (heat
pump) unit can operate
13 in an optimal energy efficiency state during the load adjustment.
Therefore, power consumption
14 of the unit is saved, and energy conservation and emission reduction of
the building is achieved.
[0081] When the compressor operates in its optimal efficiency interval, the
compressor
16 operates with good reliability and safety. Therefore, the above method
according to the
17 embodiments of the present disclosure improves the stability of the unit
and reduces the risk of
18 the failure of the compressor.
19 [0082] An apparatus for controlling an air conditioning unit provided
according to the
embodiments of the present disclosure will be described in detail below with
reference to the
21 accompanying drawings.
22 [0083] Corresponding to the above method embodiments, an embodiment
of the present
23 disclosure provides an apparatus for controlling an air conditioning
unit. FIG. 7 shows a
24 schematic structural diagram of an apparatus for controlling an air
conditioning unit. Referring to
FIG. 7, the apparatus is applied in the air conditioning unit. The air
conditioning unit may
26 include a plurality of compressors. The apparatus for controlling the
air conditioning unit may
27 include a load adjustment target value determination module 71, a first
optimal efficiency and
28 first workload calculation module 72, a second optimal efficiency and
second workload
17
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1 calculation module 73, a target optimal efficiency and target workload
calculation module 74,
2 and an air conditioning unit operation module 75.
3 [0084] The load adjustment target value determination module 71 is
configured to determine
4 a load adjustment target value of the air conditioning unit.
[0085] The first optimal efficiency and first workload calculation module
72 is configured to
6 obtain an operation condition parameter of each of the plurality of
compressors and calculate
7 first optimal efficiency and a first workload of each compressor based on
the operation condition
8 parameter. A maximum of the first workload represents a maximum
refrigerating capacity or a
9 maximum heating capacity of the compressor at the first optimal
efficiency. A minimum of the
first workload represents a minimum refrigerating capacity or a minimum
heating capacity of the
11 compressor at the first optimal efficiency.
12 [0086] The second optimal efficiency and second workload calculation
module 73 is
13 configured to obtain second optimal efficiency and a second workload of
the air conditioning
14 unit by performing cross-permutation and combination calculation on the
first optimal efficiency
and the first workload of each of the plurality of compressors. A maximum of
the second
16 workload represents a maximum refrigerating capacity or a maximum
heating capacity of the air
17 conditioning unit at the second optimal efficiency. A minimum of the
second workload represents
18 a minimum refrigerating capacity or a minimum heating capacity of the
air conditioning unit at
19 the first optimal efficiency.
[0087] The target optimal efficiency and target workload calculation module
74 is configured
21 to determine target optimal efficiency and a target workload from the
second optimal efficiency
22 and the second workload of the air conditioning unit based on the load
adjustment target value.
23 [0088] The air conditioning unit operation module 75 is configured to
control, based on the
24 target optimal efficiency and the target workload, the air conditioning
unit to perform a
refrigeration operation or a heating operation.
26 [0089] With the apparatus for controlling the air conditioning unit
according to the
27 embodiments of the present disclosure, the first optimal efficiency and
the first workload of each
28 of the plurality of compressors are calculated based on the operation
condition parameter. The
18
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1 second optimal efficiency and the second workload of the air conditioning
unit are obtained by
2 performing cross-permutation and combination calculation on the first
optimal efficiency and the
3 first workload of each of the plurality of compressors. The target
optimal efficiency and a target
4 workload are determined from the second optimal efficiency and the second
workload, and the
air conditioning unit is controlled based on the target optimal efficiency and
the target workload
6 to perform the refrigeration operation or the heating operation.
7 [0090] In the apparatus, regardless of whether the model and
specification and the
8 performance characteristics of the plurality of compressors in the air
conditioning unit are the
9 same, the refrigerating capacity or heating capacity that should be
reached by each compressor
may be well calculated and allocated. Moreover, it is possible to perform
control on an increase
11 and decrease in the number of compressors in operation. Further, the
permutation and
12 combination calculation of various compressors at the optimal efficiency
may be performed, and
13 the optimal solution may be determined on the premise of satisfying the
user's requirements of
14 the refrigeration (heating) capacity based on the actual operation
condition of each compressor.
In this way, the multi-compressor water chilling (heat pump) unit can operate
in an optimal
16 energy efficiency state during the load adjustment. Therefore, power
consumption of the unit is
17 saved, and energy conservation and emission reduction of the building is
achieved.
18 [0091] The air conditioning unit may include a controller of the air
conditioning unit, the
19 plurality of compressors, a sensor of the plurality of compressors, a
controller of the plurality of
compressors, and an actuator of the plurality of compressors.
21 [0092] The load adjustment target value determination module may be
further configured to
22 determine, by the controller of the air conditioning unit, based on a
target water temperature and
23 a change curve of a current water temperature, the load adjustment
target value of the air
24 conditioning unit.
[0093] The first optimal efficiency and first workload calculation module
may be configured
26 to obtain, by the sensor of the plurality of compressors, the operation
condition parameter of the
27 compressor.
28 [0094] The controller of the compressor may have a performance
database pre-stored thereon.
19
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1 The performance database may include a correspondence between the
operation condition
2 parameter of the compressor and the first optimal efficiency and the
first workload of the
3 compressor. The first optimal efficiency and first workload calculation
module may be further
4 configured to input the operation condition parameter into the
performance database and output
the first optimal efficiency and the first workload of the compressor.
6 [0095] The second optimal efficiency and second workload calculation
module may be
7 further configured to perform, by the controller of the air conditioning
unit, the cross-
8 permutation and combination calculation on the first optimal efficiency
and the first workload of
9 each of the plurality of compressors to obtain the second optimal
efficiency and the second
workload of the air conditioning unit.
11 [0096] The target optimal efficiency and target workload calculation
module may be further
12 configured to determine third optimal efficiency and a third workload
from the second optimal
13 efficiency and the second workload of the air conditioning unit. A
minimum of the third
14 workload is smaller than the load adjustment target value. The load
adjustment target value is
smaller than a maximum of the third workload. The target optimal efficiency
and target workload
16 calculation module may be further configured to determine a maximum of
the third optimal
17 efficiency as the target optimal efficiency and a third workload
corresponding to the target
18 optimal efficiency as the target workload.
19 [0097] The maximum of the third optimal efficiency may correspond to
a plurality of third
workloads. The target optimal efficiency and target workload calculation
module may be further
21 configured to determine a compressor operation time corresponding to the
plurality of third
22 workloads corresponding to the maximum of the third optimal efficiency,
and determine one of
23 the plurality of third workloads corresponding to a minimum of the
compressor operation time as
24 the target workload.
[0098] The target optimal efficiency and target workload calculation module
may be further
26 configured to: calculate, when there is no third workload, a difference
between the minimum of
27 the second workload and the load adjustment target value; determine a
second workload
28 corresponding to a minimum of the difference as the target workload; and
determine second
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1 optimal efficiency corresponding to the target workload as the target
optimal efficiency.
2 [0099] The air conditioning unit operation module may be further
configured to control the
3 actuator of the compressor based on the target optimal efficiency and the
target workload, to
4 allow each of the plurality of compressors to perform the refrigeration
operation or heating
operation.
6 [00100] The air conditioning unit is a water chilling unit or a heat
pump unit.
7 [00101] Those skilled in the art can clearly understand that, for
convenience and conciseness
8 of the description, for a specific operation process of the above
apparatus for the air conditioning
9 unite, reference may be made to a corresponding process in the above
embodiments of the
method for controlling the air conditioning unit, and details thereof will be
omitted herein.
11 [00102] An electronic device according to embodiments of the present
disclosure will be
12 described in detail below with reference to the accompanying drawings.
13 [00103] The embodiments of the present disclosure further provide an
electronic device,
14 which is configured to run the method for controlling the air
conditioning unit. Referring to a
schematic structural diagram of an electronic device as illustrated in FIG. 8,
the electronic device
16 may include a memory 100 and a processor 101. The memory 100 has one or
more computer
17 instructions stored thereon. The one or more computer instructions are
executed by the processor
18 101 to implement the above method for controlling the air conditioning
unit.
19 [00104] In some embodiments of the present disclosure, the electronic
device illustrated in
FIG. 8 may further be configured to include a bus 102 and a communication
interface 103. The
21 processor 101, the communication interface 103, and the memory 100 are
connected through the
22 bus 102.
23 [00105] In addition, the memory 100 may include a high-speed Random
Access Memory
24 (RAM), and may also include a non-volatile memory, such as at least one
disk memory. A
communication connection between a system network element and at least one of
other network
26 elements may be implemented through the at least one communication
interface 103 (which may
27 be wired or wireless). Moreover, the Internet, a wide area network, a
local area network, a
28 metropolitan area network, or the like may be used. The bus 102 may be
an Industry Standard
21
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1 Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended
Industry Standard
2 Architecture (EISA) bus. The buses may be divided into an address bus, a
data bus, a control bus,
3 etc. For the convenience of description, only one bidirectional arrow is
used in FIG. 8. However,
4 it does not mean that there is only one bus or one type of bus.
[00106] The processor 101 may be an integrated circuit chip with signal
processing capability.
6 In an implementation, the steps of the above methods may be implemented
by hardware
7 integrated logic circuits in the processor 101 or instructions in a form
of software. The above
8 processor 101 may be a general-purpose processor, including a Central
Processing Unit (CPU), a
9 Network Processor (NP), etc.; and may further be a Digital Signal
Processor (DSP), an
Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate
Array (FPGA) or
11 other programmable logic devices, a discrete gate or a transistor logic
device, and a discrete
12 hardware component. The methods, steps, and logical block diagrams
disclosed in the
13 embodiments of the present disclosure may be implemented or performed by
the processor 101.
14 The general-purpose processor may be a microprocessor or any
conventional processor. The
steps of the methods disclosed in the embodiments of the present disclosure
may be directly
16 embodied as being performed and completed by a hardware decoding
processor, or by a
17 combination of hardware and software modules in the decoding processor.
The software module
18 may be located in a storage medium well-known in the field such as a
random access memory, a
19 flash memory, a Read-Only Memory (ROM), a Programmable ROM (PROM), an
electrically
erasable programmable memory, a register, etc. The storage medium is located
in the memory
21 100, and the processor 101 can read information from the memory 100, and
completes the steps
22 in the above method in combination with hardware thereof.
23 [00107] Embodiments of the present disclosure also provide a computer-
readable storage
24 medium. The computer-readable storage medium has computer-executable
instructions thereon.
The computer-executable instruction, when invoked and executed by a processor,
may cause the
26 processor to implement the method for controlling the air conditioning
unit as described above,
27 and thus the specific implementation of the method may refer to that of
the method embodiments,
28 and details thereof will be omitted herein.
22
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1 [00108] In the method and apparatus for controlling the air
conditioning unit, and a computer
2 program product of the electronic device according to the embodiments of
the present disclosure,
3 the computer program product may include a computer-readable storage
medium having
4 program codes stored thereon. Instructions included in the program code
can execute the method
in the above method, and thus the specific implementation of the method may
refer to that of the
6 method embodiments, and details thereof will be omitted herein.
7 [00109] Those skilled in the art can clearly understand that, for the
convenience and
8 conciseness of the description, for the specific operation processes of
the systems and/or
9 apparatus described above, reference may be made to the corresponding
processes in the above
method, and details thereof will be omitted here.
11 [00110] In addition, in the description of the embodiments of the
present disclosure, unless
12 otherwise clearly specified and limited, terms such as "installed,"
"connected with," "connected
13 to," and the like should be understood in a broad sense. For example, it
may be a fixed
14 connection or a detachable connection or connection as one piece; a
mechanical connection or an
electrical connection; a direct connection or an indirect connection through
an intermediate; or
16 an internal communication of two components. For those of ordinary skill
in the art, the specific
17 meaning of the above-mentioned terms in the present disclosure can be
understood according to
18 specific circumstances.
19 [00111] When the function is implemented in the form of a software
functional unit and sold
or used as a standalone product, it can be stored in a computer-readable
storage medium. Based
21 on such understanding, all or part of the technical solutions according
to the present disclosure,
22 or the part thereof that contributes to the related art, can be embodied
in the form of a software
23 product. The computer software product may be stored in a storage medium
and contain
24 instructions to enable a computer device, such as a personal computer, a
server, or a network
device, etc., to perform all or part of the steps of the method described in
each of the
26 embodiments of the present disclosure. The storage medium may include
various mediums
27 capable of storing program codes, such as a Universal Serial Bus flash
drive, a mobile hard disk,
28 an ROM, an RAM, a magnetic disk, or an optical disc.
23
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1 [00112] In the description of the embodiments of the present
disclosure, the orientation or the
2 position indicated by technical terms such as "center," "over," "below,"
"left," "right," "vertical,"
3 "horizontal," "inner," and "outer," should be construed to refer to the
orientation and the position
4 as shown in the drawings, and is only for the convenience of describing
the embodiments of the
present disclosure and simplifying the description, rather than indicating or
implying that the
6 pointed device or element must have a specific orientation, or be
constructed and operated in a
7 specific orientation, and therefore cannot be understood as a limitation
of the embodiments of the
8 present disclosure. In addition, the term "first," "second," "third" is
only for descriptive purposes,
9 rather than indicating or implying relative importance.
[00113] Finally, it should be noted that the embodiments described above
are merely specific
11 implementations of the present disclosure and are used only to
illustrate, rather than limit the
12 technical solutions of the present disclosure, and the scope of the
present disclosure is not limited
13 thereto. Although the present disclosure has been described in detail
with reference to the
14 foregoing embodiments, it is conceivable for those skilled in the art
that, within the technical
scope disclosed in the present disclosure, modifications can be made or can be
easily conceived
16 to the technical solutions described in the foregoing embodiments, or
equivalent replacements
17 can be made to some of the technical features in the technical solutions
described in the
18 foregoing embodiments. These modifications, changes, or replacements,
which do not depart the
19 essence of corresponding technical solutions from the spirit and scope
of the technical solutions
of the embodiments of the present disclosure, shall fall within the scope of
the present disclosure.
21 Therefore, the scope of the present disclosure should be defined only by
claims.
22 [00114] INDUSTRIAL APPLICABILITY
23 [00115] Embodiments of the present disclosure provide a method and
apparatus for
24 controlling an air conditioning unit, an electronic device, and a
readable storage medium. The
method includes: determining a load adjustment target value of the air
conditioning unit;
26 obtaining an operation condition parameter of each of the plurality of
compressors, and
27 calculating first optimal efficiency and a first workload of each of the
plurality of compressors
28 based on the operation condition parameter; obtaining second optimal
efficiency and a second
24
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1 workload of the air conditioning unit by performing cross-permutation and
combination
2 calculation on the first optimal efficiency and the first workload of
each of the plurality of
3 compressors; determining target optimal efficiency and a target workload
from the second
4 optimal efficiency and the second workload of the air conditioning unit
based on the load
adjustment target value; and controlling, based on the target optimal
efficiency and the target
6 workload, the air conditioning unit to perform a refrigeration operation
or a heating operation. In
7 this way, various compressors of different models and specifications in
the air conditioning unit
8 can be adapted. Further, it is possible to enhance the energy efficiency
of the air conditioning
9 unit.
[00116] In addition, it should be understood that the method and apparatus
for controlling the
11 air conditioning unit, the electronic device, and the readable storage
medium of the present
12 disclosure may be reproduced and may be applied to various applications.
For example, the air
13 control method and apparatus for the conditioning unit, the electronic
device, and the readable
14 storage medium of the present disclosure may be applied to the technical
field of air conditioners.
25
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