HEAT EXCHANGER SYSTEM HAVING AN EXTERNAL ROTOR MOTOR

INSTALLATION D'ECHANGE DE CHALEUR

English Abstract

A heat exchange system of the invention includes multiple grids, a blower including an external rotor motor and a wind blade, a compressor, and a box having multiple exhaust inlets. The exhaust inlets are disposed on the side of the box, the grid is disposed at an exhaust outlet of the box, the blower is disposed in the box and below the grid, and the compressor is disposed on bottom surface in the box. The blower is an external rotor axial fan, and the wind blade is disposed outside a rotor of the external rotor motor. The heat exchange system of the invention features simple structure, low cost, large air output, and good blowing effect, and is high efficient and power saving.

French Abstract

Un système déchange de chaleur de linvention comprend plusieurs grilles, un ventilateur de soufflage comportant un moteur de rotor externe et une pale, un compresseur et un boîtier pourvu de plusieurs entrées déchappement. Ces dernières sont disposées sur le côté du boîtier, la grille est disposée à une sortie déchappement du boîtier, le ventilateur est disposé dans le boîtier et sous la grille, et le compresseur est disposé sur la surface inférieure du boîtier. Le ventilateur est de type axial à rotor externe et la pale est disposée à lextérieur dun rotor du moteur de rotor externe. Le système déchange de chaleur de linvention offre une structure simple, un faible coût, une grande sortie dair et un bon effet de soufflage. Il est également très efficace et très économe en énergie.

Claims

CLAIMS
1. A heat exchange system, comprising multiple grids, a blower, a
compressor, and a box having multiple exhaust inlets disposed on a side
of said box, said multiple grids being disposed at an exhaust outlet of said
box, said blower being disposed in said box and below said multiple grids,
said compressor being disposed on a bottom surface in said box;
wherein:
said blower is an external rotor axial fan, and comprises an external
rotor motor and multiple wind blades, said external rotor motor comprising
a rotor, and said rotor comprising a bottom and a center;
said blower is connected to said multiple grids;
said multiple wind blades are disposed outside said rotor and are
connected to said center; and
a distance between said multiple wind blades and said multiple
grids is shorter than a distance between said bottom and said multiple
grids.
2. The heat exchange system of claim 1, wherein
said multiple wind blades are disposed outside said rotor of said
external rotor motor via a support;
said support comprises an annular cylinder, and multiple mounting
feet extending from said annular cylinder;
each of said multiple wind blades is respectively disposed on each
of said multiple mounting feet; and
said annular cylinder is fit on said rotor of said external rotor motor.
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3. The heat exchange system of claim 1 or 2, wherein said multiple wind
blades are equal-width blades.
4. The heat exchange system of claim 2, wherein said annular cylinder has
closed ends.
5. The heat exchange system of claim 2 or 4, wherein an inner wall of said
annular cylinder is interference fit with an outer wall of said rotor.
6. The heat exchange system of claim 2, wherein
a screw hole is disposed on each of said multiple mounting feet;
and
said multiple wind blades are respectively disposed on said multiple
mounting feet via a bolt and a nut.
7. The heat exchange system of claim 2, wherein
a through hole is disposed on each of said multiple mounting feet;
and
said multiple wind blades are respectively connected to said
multiple mounting feet via rivets.
8. The heat exchange system of claim 1 or 2, wherein said multiple wind
blades are respectively directly welded on said multiple mounting feet, or
directly welded on the outside of said rotor of said external rotor motor.
9. The heat exchange system of claim 2, wherein said multiple wind blades
are respectively disposed on said multiple mounting feet via buckles.
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10. The heat
exchange system of claim 2 or 4, wherein said annular cylinder
and said multiple mounting feet are integrally formed, or connected to
each other as two independent parts via welding, buckles, or riveting.
9

Description

CA 02715411 2015-04-27
HEAT EXCHANGE SYSTEM HAVING AN EXTERNAL ROTOR MOTOR
FIELD OF THE INVENTION
[0001] The invention relates to a heat exchange system.
BACKGROUND OF THE INVENTION
[0002] As shown in FIG. 1, in a heat exchange system of an outdoor fan unit
for an air
conditioner, multiple grids 1 are disposed at an exhaust outlet 6 of a box 4,
a blower 2 is
disposed in the box 4 and below the grid 1, and the blower 2 comprises a drive
motor 7,
and a wind blade 9 or a wind wheel disposed on a motor shaft 8 of the drive
motor 7.
Problems with the system are: 1) rotational inertia of the drive motor 7 of
the blower 2 is
small, the wind blade 9 of the blow 2 is far away from the exhaust outlet 6,
and thus
having a high wind pressure coefficient, large wind resistance, and low
efficiency, which
causes the blower 2 to blow small amount of wind from the exhaust outlet 6 of
the box
4, and thus an ideal blowing effect cannot be facilitated; 2) the drive motor
7 of the
blower 2 has large fluctuation in rotating torsion, namely large resonance,
which causes
the wind blade 9 or the wind wheel to rotate unstably, and affects blowing
effects; 3) the
heat exchange system employing the blower structure is low efficient and power
consuming, and cannot meet requirement of the current society for energy
conservation
and environmental protection.
SUMMARY OF THE INVENTION
[0003] In view of the above-described problem, it is one objective of the
invention to
provide a heat exchange system that features simple structure, low
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CA 02715411 2010-09-22
cost, large air output, and good blowing effect, and is high efficient and
power
saving.
[0004] The invention is implemented as follows:
[0005] A heat exchange system, comprising multiple grids, a blower, a
compressor, and a box having multiple exhaust inlets on the side thereof, the
grid
being disposed at the exhaust outlet of the box, the blower being disposed in
the
box and below the grid, the compressor being disposed on bottom surface in the
box. The blower is an external rotor axial fan, and comprises an external
rotor
motor and a wind blade, and the wind blade is disposed outside a rotor of the
external rotor motor.
[0006] The wind blade is disposed outside the rotor of the extemal
rotor
motor via a support, the support comprises an annular cylinder, and multiple
mounting feet extending from the annular cylinder, the wind blade is disposed
on
the mounting foot, and the annular cylinder is fit on the rotor of the
external rotor
motor.
[0007] The wind blade is an equal-width blade and in the vicinity of
the
exhaust outlet of the box.
[0008] The annular cylinder is an integral formed cylinder, or a
cylinder
formed via an annular body with an opening.
[0009] Inner wall of the annular cylinder is interference fit with outer
wall of
the rotor.
[0010] A screw hole is disposed on the mounting foot, and the wind
blade is
disposed on the mounting foot via a bolt and a nut.
[0011] A through hole is disposed on the mounting foot, and the wind
blade
is connected to the mounting foot via a rivet.
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CA 02715411 2010-09-22
[0012] The wind blade is directly welded on the mounting foot, or
directly
welded on the outside of the rotor of the external rotor motor.
[0013] The wind blade is disposed on the mounting foot via buckling.
[0014] The annular cylinder and the mounting foot are integrally
formed, or
connected to each other as two independent parts via welding, buckling, or
riveting.
[0015] Advantages of the invention comprise: 1) the blower uses the
external
rotor axial fan, the rotor thereof features large rotational inertia, small
fluctuation in
torsion, and stable operation, and the wind blade is close to the exhaust
outlet
and has a low wind pressure coefficient, small wind resistance, and high
efficiency,
which causes the external rotor axial fan to blow large amount of wind from
the
exhaust outlet of the box and thus improving blowing effect; 2) the heat
exchange
system features high overall efficiency and low power consumption, and meets
requirement of the current society for energy conservation and environmental
protection; 3) the wind blade is an equal-width blade with a large area and in
the
vicinity of the exhaust outlet of the box, and thus greatly improving inducing
capacity of the external rotor axial fan, and blowing effect of the heat
exchange
system; 4) the annular cylinder on the support is fit on a housing of the
rotor of the
external rotor motor, and the inner wall of the annular cylinder is
interference fit
with the outer wall of the rotor, which make the invention have simple
assembling,
reliable connection, high production efficiency, low processing difficulty,
and
reduced production cost; 5) the external rotor axial fan is combined and
features
simple installation and disassembly, and the external rotor motor and the wind
blade can be transported separated, which reduces transportation cost; 6) by
using the external rotor axial fan, overall volume of the heat exchange system
and
system cost are reduced.
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CA 02715411 2010-09-22
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a schematic view of a heat exchange system in the
related
art;
[0017] FIG. 2 is a schematic view of a heat exchange system of an
exemplary embodiment of the invention;
[0018] FIG. 3 is a schematic view of an external rotor axial fan in
FIG. 2;
[0019] FIG. 4 is another schematic view of the external rotor axial
fan in FIG.
3;
[0020] FIG. 5 is a cross-sectional view of FIG. 4 along a line A-A; and
[0021] FIG. 6 is an enlarged view of FIG. 5 along a line B-B.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Further description of the invention will be given below in
conjunction
with specific embodiments and accompanying drawings.
[0023] As shown in FIGS. 2, 3 and 4, a heat exchange system of the
invention comprises multiple grids 1, a blower 2, a compressor 3, and a box 4
having multiple exhaust inlets 5 on the side thereof. The grid 1 is disposed
at an
exhaust outlet 6 of the box 4, the blower 2 is disposed in the box 4 and below
the
grid 1, the compressor 3 is disposed on bottom surface in the box 4. The
blower 2
is an external rotor axial fan, and comprises an external rotor motor 7 and a
wind
blade 8, and the wind blade 8 is disposed outside a rotor 71 of the external
rotor
motor 7.
[0024] The wind blade 8 is disposed outside the rotor 71 of the
external rotor
motor 7 via a support 9, the support 9 comprises an annular cylinder 91, and
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CA 02715411 2010-09-22
multiple mounting feet 92 extending from the annular cylinder 91, the wind
blade 8
is disposed on the mounting foot 92, and the annular cylinder 91 is fit on the
rotor
71 of the external rotor motor 7. The wind blade 8 is an equal-width blade and
in
the vicinity of the exhaust outlet 6 of the box 4. The annular cylinder 91 is
a
cylinder formed via an annular body with an opening, and specifically is a
closed
cylinder formed by the annular body with the opening via a fastening device
10.
As shown in FIGS. 5 and 6, the external rotor motor comprises a rotor 71 and a
stator 72, and inner wall of the annular cylinder 91 is interference fit with
outer wall
of the rotor 71. A through hole is disposed on the mounting foot 92, and the
wind
blade is connected to the mounting foot 92 via a rivet 11. The annular
cylinder 91
and the mounting foot 92 are integrally formed, or connected to each other as
two
independent parts via welding, buckling, or riveting.
[0025] In addition, the annular cylinder is an integral formed
cylinder, or a
closed cylinder made via welding. Alternatively, a screw hole is disposed on
the
wind blade, and the wind blade is disposed on the mounting foot via a bolt and
a
nut. Alternatively, the wind blade is directly welded on the mounting foot, or
directly welded on the outside of the rotor of the external rotor motor.
Altematively,
the wind blade is disposed on the mounting foot via buckling.
[0026] The blower of the invention uses the external rotor axial fan
that
features large rotational inertia, small fluctuation in torsion, and stable
operation,
and the wind blade is close to the exhaust outlet and has a low wind pressure
coefficient, small wind resistance, and high efficiency, which causes the
external
rotor axial fan to blow large amount of wind from the exhaust outlet of the
box and
thus improving blowing effect; the heat exchange system features high overall
efficiency and low power consumption, and meets requirement of the current
society for energy conservation and environmental protection; the wind blade
is
an equal-width blade with a large area and in the vicinity of the exhaust
outlet of
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CA 02715411 2014-09-04
Sep. 4. 2014 6:17PM No. 0516
P. 10
the box, and thus greatly improving inducing capacity of the external rotor
axial fan, and
blowing effect of the heat exchange system.
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Representative Drawing