Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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= CA 02965399 2017-04-21
Attorney Docket No. 36740-10
AXIAL-FLOW AIR BLOWER FAN BLADES
CROSS REFERENCE TO RELATED APPLICATIONS
The present application is a Continuation Application of PCT application No.
PCT/CN2015/084526 filed on July 20, 2015, which claims the benefit of Chinese
Utility Model Application No. 201420616868.X filed on October 24, 2014. All
the
above are hereby incorporated by reference.
FIELD OF THE TECHNOLOGY
The present application relates to the field of air blower technology, and in
particular
relates to an axial-flow air blower's fan blades.
BACKGROUND
In existing market, blades and blade hub of an axial-flow air blower are of
separate
type, and need to be assembled by workers. The disadvantages are poor
concentricity,
low wind speed, low strength, and loud noise. In the market, the diameter of
the fan,
the number of blades, and the number of guide blades do not reach a reasonable
ratio.
The shortcomings are that wind speed is low, machine's current is high, fan
vibration
is vigorous, and the gap between the fan blades and the fan housing is large.
This does
not facilitate input air volume, and results in small output air volume and
loud noise.
SUMMARY
The technical problem to be solved is to provide an axial-flow air blower with
fan
blades having simple and reasonable structure. The blades and the hub are
integrated.
This advantageously improves the concentricity and strength of the blades,
increases
air volume, and reduces noise. A reasonable number of blades and fan diameter
together with a reasonable number of guide blades can improve efficiency and
wind
speed.
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CA 02965399 2017-04-21
Attorney Docket No. 36740-10
To solve the above-mentioned technical problem, the technical solution is to
provide
an axial-flow air blower's fan blades which may include a blade portion, and a
guide
blade portion provided behind the blade portion, the guide blade portion
having five
guide blades, the blade portion having a hub and a plurality of blades
provided on the
hub, the blades and the hub being integrated, wherein there are twelve blades,
and an
outer circumference defined by outer edges of the twelve blades has a diameter
of 84
mm.
In a preferred embodiment, the hub has a diameter of 40 mm.
In a preferred embodiment, the guide blade portion may further include a
central
cylinder, one end of each guide blade being fixed to the center cylinder and
another
end being fixed to an inner wall of an outer cylinder of the axial-flow air
blower.
The beneficial effect of the axial-flow air blower fan blades of the present
application
is that it has a simple and reasonable structure. The blades and the hub are
integrated
so as to facilitate improvement of concentricity and strength of the blades,
increase air
volume, and reduce noise. A reasonable number of blades and fan diameter
together
with a reasonable number of guide blades can improve efficiency and wind
speed.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more clearly illustrate the technical solution provided by the
embodiments
of the axial-flow air blower's fan blades of the present application, the
drawings to be
used in the description of the embodiments will be briefly described below. It
will be
apparent that the drawings mentioned in the following description are merely
some
implementations of the axial-flow air blower's fan blades. Without making any
creative effort, a person skilled in the art may derive other drawings from
the
drawings in the present application, wherein:
Figure 1 is a schematic view of the structure of a blade portion;
Figure 2 is a schematic view of the structure of a guide blade portion;
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CA 02965399 2017-04-21
Attorney Docket No. 36740-10
Figure 3 is a schematic view of the structure of a blade;
Figure 4 is a cross-sectional view of the blade taken along line E-E of Figure
3; and
Figure 5 is a cross-sectional view of the blade taken along line H-H of Figure
3.
The reference numerals in the drawings and their designating parts are as
follows: 1 -
guide blades, 2 - hub, 3 - blades.
DETAILED DESCRIPTION
The technical solution provided by the embodiments of the axial-flow air
blower fan
blades of the present application will be described clearly and completely
below. It is
apparent that the described embodiments are only some embodiments of the axial-
flow air blower's fan blades, and not all of the embodiments. All other
embodiments
obtained by an ordinary technical person skilled in the art, without making
any
creative effort, are within the scope of protection of the axial-flow air
blower fan
blades of the present application.
Referring to Figures 1 to 5, an embodiment of the axial-flow air blower fan
blades of
the present application may include a blade portion, and a guide blade portion
provided behind the blade portion. The guide blade portion may include five
guide
blades 1. The blade portion may include a hub 2 and a plurality of blades 3
provided
on the hub 2. The blades 3 and the hub 2 can be integrated. This can
advantageously
improve the concentricity and strength of the blades, increase air flow, and
reduce
noise.
The number of the blades 3 can be twelve. An outer circumference defined by
the
outer edges of the twelve blades 3 may have a diameter of 84 mm. With the
combination of the five guide blades 1, the efficiency and wind speed of the
fan
blades can be improved. Otherwise, under the circumstances that the gap
between the
fan blades and fan housing is small and the motor is not fixed steadily, it
will lead to
friction between the fan blades and the fan housing. At the same time, the
requirement
of parallelism of the matching faces of the motor and the fan blades is
higher.
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CA 02965399 2017-04-21
Attorney Docket No. 36740-10
The following table shows the data of performance for different blade numbers
and
different guide blade numbers:
Model Rate of Flow Shaft Power Outlet Total Fan Efficiency
(Kg/S) (W) Pressure (Pa)
11 fan blades + 0.1792 317.81 1195.661 55.04%
7 guide blades
12 fan blades + 0.2064 458.55 1586.598 58.36%
guide blades
Preferably, the diameter of the hub 2 is 40 mm.
The guide blade portion may further include a central cylinder. One end of
each guide
blade may be fixed to the center cylinder and another end may be fixed to an
inner
wall of an outer cylinder of the axial-flow air blower.
The beneficial effect of the axial-flow air blower fan blade of the present
application
is that it has a simple and reasonable structure. The integration of the
blades and the
hub advantageously improves the concentricity and strength of the blades,
increases
air volume, and reduces noise. A reasonable number of blades and fan diameter
together with a reasonable number of guide blades can improve efficiency and
wind
speed.
The above-mentioned embodiments are merely some embodiments of the axial-flow
air blower's fan blades of the present application, and the scope of patent
protection is
not limited to these embodiments. Any equivalent structures or equivalent
changes of
process using the contents of the present patent specification, or any
direct/indirect
application in other related field of technology are within the scope of
patent
protection of the present application.
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