CN102661288A - Axial-flow fan or diagonal-flow fan, and air conditioner mounted outdoor unit with same - Google Patents
Axial-flow fan or diagonal-flow fan, and air conditioner mounted outdoor unit with same Download PDFInfo
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- CN102661288A CN102661288A CN2011104355146A CN201110435514A CN102661288A CN 102661288 A CN102661288 A CN 102661288A CN 2011104355146 A CN2011104355146 A CN 2011104355146A CN 201110435514 A CN201110435514 A CN 201110435514A CN 102661288 A CN102661288 A CN 102661288A
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- blade
- axial
- flow fan
- flow
- outdoor unit
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Abstract
The present invention relates to an AXIAL-FLOW FAN OR DIAGONAL-FLOW FAN, AND an AIR CONDITIONER MOUNTED OUTDOOR UNIT WITH the SAME. The DIAGONAL-FLOW fan or AXIAL-FLOW FAN comprises a rotatably-driven wheel hub (14B), and more than two blades (14A) configured at the periphery of the wheel hub, wherein when the space between two adjacent blades is set to be (P), the chord length of the blades is set to be (C), the pitch chord ratio (P)/(C) is more than 1.4, the diameter of the front edge blade end is set to be (D1), and the diameter of the rear edge blade end is set to be (D2), the (D1)>(D2). Therefore, the AXIAL-FLOW FAN OR DIAGONAL-FLOW FAN, AND an AIR CONDITIONER MOUNTED OUTDOOR UNIT WITH the SAME is high in air feed performance and small in noise.
Description
Technical field
The present invention relates to the air conditioner that axial-flow blower or diagonal flow fan and lift-launch have the outdoor unit of this axial-flow blower or diagonal flow fan.
Background technique
With reference to Fig. 8, Fig. 9 existing technology is described.Fig. 8 is the plan view of disclosed existing propeller fan (propeller fan) in the patent documentation 1, and Fig. 9 is a sectional drawing.
In the propeller fan shown in Fig. 8, Fig. 9,1 is wheel hub, and on its periphery, four wings 2 of same shape are integrally formed by resin system equally spacedly.2
aBe the leading edge of the inlet side that becomes wind, 2
bTrailing edge for the outlet side that becomes wind.2
B2For trailing edge line, form roughly line part with plane shape, and form line part with respect to running shaft 3 also approximate vertical.Leading edge 2
aRadial direction foreign side near front end 2
A1 Trailing edge 2 with respect to the wing of on sense of rotation N, going ahead of the rest
bOn sense of rotation, do not overlap, but roughly along trailing edge 2
bRadial direction foreign side near (bight) 2
B1Curve, arrive than near the radial direction foreign side 2
B1The outside of more on sense of rotation, going ahead of the rest.And then, with leading edge 2
aThe blower fan diameter D of side
aBlower fan D outer diameter than the trailing edge side
bFrom strengthen gradually midway, with the mode that on radial direction, staggers with respect to the wing of going ahead of the rest that the wide change of the wing is big, will be near leading edge 2
aRadial direction foreign side (near front end 2
A1) plane shape form taper.
No. 3077863 communique of patent documentation 1 (Japan) patent
But, in the propeller fan of existing technology, have following problem.The propeller fan of existing technology make between adjacent foil inferior limit ground near and wing area is strengthened, therefore,, can not successfully suck promotion even make enlarged-diameter in leading edge portion.That is, inhaled air interferes and causes stall from the side, produces big turbulent flow and causes noise to rise.In addition, the turbulent flow that breaks away from trailing edge interferes with the wing at rear, makes the air-flow stall around the wing, makes the wind pushing performance variation.Simultaneously, when air turbulence impacts the wing at rear, the tendency of NZ sound (becoming the rotation sound of peak value in specific frequency) might take place, increased the discomfort of noise.
Summary of the invention
The present invention is the invention that solves above-mentioned problem, and its purpose is to provide a kind of oblique flow that when reducing noise, improves wind pushing performance or axial-flow blower and lift-launch to have the air conditioner of the outdoor unit of this oblique flow or axial-flow blower.
Solve the method for problem
In order to solve above-mentioned problem; The present invention provides a kind of oblique flow or axial-flow blower; It possesses rotation wheel hub that drives and the blade more than two on every side that is disposed at above-mentioned wheel hub, is when the chord length that above-mentioned interlobate spacing (pitch) is made as P, above-mentioned blade is made as C, and pitch-chord ratio (pitch chord ratio) P/C is more than 1.4; With leading edge end of blade (tip) diameter of blade be made as D1, when vane trailing edge end of blade diameter is made as D2, the oblique flow of D1＞D2 or axial-flow blower.
Through pitch-chord ratio P/C is made as more than 1.4, make the distance of leading edge of the next blade from the vane trailing edge to the rear bigger, can guarantee the space, can prevent that impacting next blade because of the turbulent flow that back stream is produced encourages turbulent flow.That is, can prevent to cause stall because of the interference that back stream causes.In addition, having suppressed disorderly fluid utilizes the blade at rear and promotes turbulent flow and cause noise to rise.And then, through being made as D1＞D2, encouraged suction stream from leading edge.Particularly, promote the diametric suction of blower fan, improved wind pushing performance.In addition, because the blade at the back stream no show rear of the disorder of emitting from trailing edge just spreads in diametric(al), so the rear blade can not suppress suction stream.
The invention effect
According to the present invention; Can provide to prevent, and can promote to make diagonal flow fan or the axial-flow blower of wind pushing performance raising and the air conditioner that lift-launch has the outdoor unit of this diagonal flow fan or axial-flow blower from the suction stream of leading edge because the wind pushing performance that interference produced that back stream causes reduces and noise rises.
These modes of the present invention and characteristic, from relevant for can be clear fully the following record preferred embodiment of appended accompanying drawing.
Description of drawings
Fig. 1 is the sectional drawing of outdoor unit of air conditioner that is equipped with the blower fan of mode of execution 1 of the present invention;
Fig. 2 is the stereogram of the blower fan of mode of execution 1;
Fig. 3 is the front elevation of the blower fan of mode of execution 1;
Fig. 4 is the profile of the blower fan of mode of execution 1;
Fig. 5 is the plotted curve of relation of pitch-chord ratio and the air quantity of expression axial-flow blower;
Fig. 6 is the front elevation of the blower fan of mode of execution 2 of the present invention;
Fig. 7 is the profile of the blower fan of mode of execution 2;
Fig. 8 is the front elevation of existing propeller fan;
Fig. 9 is the sectional drawing of existing propeller fan.
Embodiment
The invention of first aspect is: the oblique flow or the axial-flow blower that possess rotation wheel hub that drives and the blade more than two on every side that is disposed at above-mentioned wheel hub; When the chord length that above-mentioned interlobate spacing is made as P, above-mentioned blade is made as C; Pitch-chord ratio P/C is more than 1.4; With the leading edge end of blade diameter of blade be made as D1, when vane trailing edge end of blade diameter is made as D2, D1＞D2.
Thus, the distance of the leading edge of the next blade from the vane trailing edge to the rear is bigger, can guarantee the space, can prevent owing to the turbulent flow that back stream produces is impacted the situation that next blade encourages disorder.That is, can prevent situation because of the interference stall of back stream.In addition, can prevent that disorderly fluid from utilizing the blade promotion disorder at rear and causing noise to rise.And then, encouraged suction stream from leading edge.Particularly promoted the diametric suction of blower fan, the air quantity performance improves.In addition, the blade at the back stream no show rear of the disorder of emitting from trailing edge just spreads apart in diametric(al), so the rear blade can not suppress suction stream.
About the invention of second aspect, be in oblique flow or axial-flow blower, the sheet number of blade is two.
Thus, can guarantee interlobate space fully, the blade at the back stream no show rear of the disorder of emitting from trailing edge just spreads apart in diametric(al).Consequently, can prevent that the rear blade from suppressing suction stream.
About the invention of the third aspect, be in the blade of oblique flow or axial-flow blower, when the blade end of blade diameter on the arbitrary position between leading edge and the trailing edge is made as D3, D1＞D3=D2.That is, between D2 and the D3 same blower fan diameter, the beeline of throttle orifice (orifice) is guaranteed in certain interval.
Thus, static pressure is improved.That is, even, under the situation that flowing resistance increases,, reduce so also can not cause big air quantity because guaranteed static pressure because the frosting of heat exchanger or dirt, dust etc. adhere to.Likewise, under the situation that flowing resistance increases, also can alleviate abnormal sound because of the bias current generation of air-flow
About the invention of fourth aspect, be that oblique flow or axial-flow blower are provided in the outdoor unit, this outdoor unit is equipped on air conditioner.
Below, with reference to accompanying drawing mode of execution of the present invention is described.In addition, the present invention is not limited by this mode of execution.
(mode of execution 1)
Fig. 1 is the sectional drawing of outdoor unit of air conditioner that possesses the blower fan of this mode of execution 1, and Fig. 2 is the stereogram that is equipped on the axial-flow blower in the outdoor unit.Fig. 3, Fig. 4 are front elevation, the profile of coaxial flow blower fan.
The main body 100 of the outdoor unit of air conditioner comprises: the compressor 18 of suction port 12, heat exchanger 13, blower fan 14, the blower motor 15 that drives blower fan 14, the throttle orifice 16 that surrounds blower fan 14, air discharge grille 17, air conditioner needs be used for the above-mentioned dividing plate that separates 19.Blower fan 14 is made up of blade (being also referred to as wheel blade (blade)) 14A and wheel hub 14B.
Through driving blower motor 15, because the air that the rotation of blower fan 14 causes at first passes through heat exchanger 13 via suction port 12.In this heat exchanger 13, air is carried out heat transmission, flows into blower fan 14 afterwards.In blower fan 14, by speedup and boost, near throttle orifice 16, reach maximum wind speed, pressure maximum.Then, be discharged into the outside of the main body 100 of outdoor unit through air discharge grille 17.Arrow is the air draught of summary.
Like Fig. 3, shown in Figure 4, be on the concentric circle arbitrarily of benchmark at rotating center with each blade, the spacing between blade 14A is made as P, when the chord length of blade 14A was made as C, definition pitch-chord ratio t was P/C.Preferred pitch-chord ratio t is more than 1.4.At this, blower fan 14 is driven in rotation at the diagram clockwise direction in Fig. 3, and the ora terminalis of the sense of rotation front side among the blade 14A is made as leading edge 20, and the ora terminalis of sense of rotation rear side is made as trailing edge 21.Pitch-chord ratio t is being set under the situation more than 1.4; Distance till the leading edge 20 of the next blade 14A at trailing edge 21 to the sense of rotation rear of blade 14A is bigger; Have living space, can prevent that therefore impacting Next blade 14A because of the turbulent flow of back stream encourages disorderly situation.That is, prevent to flow the situation of the interference stall that causes because of the back.In addition, prevented that disorderly fluid from utilizing the blade 14A at rear to promote disorder to cause noise to rise.
In addition, the leading edge end of blade diameter (external diameter of the blower fan of front edge side) with blade 14A is made as D1, trailing edge end of blade diameter (external diameter of the blower fan of trailing edge side) when being made as D2, D1＞D2.Fig. 5 fixes the value of D1 and D2 and the rotating speed of blower fan for expression, and under the condition of D1＞D2, the plotted curve of the air quantity changes of properties of the blower fan when pitch-chord ratio t is changed.Can confirm that by Fig. 5 when t=1.4 was above, the air quantity performance improved sharp.Infer that this is that the turbulent flow that is produced by back stream is impacted next blade 14A, has encouraged the cause that the such situation of turbulent flow does not have basically because big to the distance change of the leading edge 20 of the next blade 14A at sense of rotation rear from the trailing edge 21 of blade 14A.That is the interference that, basically not have the back to flow to cause and the situation of stall.In addition, having suppressed disorderly fluid utilizes the blade 14A promotion disorder at rear and causes noise to rise.And then, through increasing leading edge end of blade diameter D1, encouraged the air-flow that sucks from the side of leading edge end of blade (the blower fan outer circumference end of leading edge), the air quantity performance improves.
In addition, in the blower fan 14 of Fig. 2, Fig. 3 and Fig. 4, represented that blade 14A is two a form, but the present invention is not defined to this.The sheet number of blade can for example can be three for more than two.More preferably the sheet number of blade is two a situation.Can not influence the value of pitch-chord ratio and strengthen the leading edge end of blade diameter D1 of blade.Thus, the air-flow of the disorder of emitting from vane trailing edge can not impact next blade basically, and direction flows in the footpath.That is, prevented because the interference that back stream causes and the situation of stall.
(mode of execution 2)
Below, with reference to accompanying drawing, the blower fan 140 of mode of execution 2 of the present invention is described.In the accompanying drawing below,, represent to have in fact the constituting component of same function with same reference marks for the simplicity of explaining.In addition, the present invention is not limited to following mode of execution.
Diagonal flow fan of this mode of execution 2 or the blower fan of axial flow 140 comprise blade 140A and wheel hub 140B.Blade 140A, wing outer circumference diameter reduces to trailing edge 21 from leading edge 20 gradually, and 21 is same diameter from any place to the trailing edge.That is,, the leading edge end of blade diameter with blade 140A is made as locational arbitrarily end of blade diameter between D2, leading edge 20 and the trailing edge 21 when being made as D3, D1＞D3=D2 when being made as D1, trailing edge end of blade diameter.
Be same blower fan diameter between D2 and the D3, can guarantee to be certain interval, static pressure is improved with the beeline of throttle orifice.Even under the situation that flowing resistance increases because heat exchanger frosting or dirt, dust etc. adhere to, also can guarantee static pressure, reduce so can not cause big air quantity.Likewise, even under the situation that flowing resistance increases, also can alleviate the abnormal sound that produces because of the bias current of flowing.
In addition, through the mode of execution arbitrarily in the above-mentioned various mode of executions is suitably made up, can obtain the effect that has separately.
The present invention puts down in writing fully for preferred embodiment having carried out, but for this people who is skilled in technique, can understand various distortion and correction with reference to accompanying drawing.Such distortion or only revise otherwise break away from the scope of the present invention that the scope of this claim limits just is construed as and is contained among the present invention.
Utilizability in the industry
According to the present invention, the minimizing noise can be provided, and improve oblique flow or the axial-flow blower of wind pushing performance and the air conditioner that lift-launch has the outdoor unit of this oblique flow or axial-flow blower.Particularly, being end of blade diameter than trailing edge when big, that is, in the outdoor unit of air conditioner, under the situation that the gap in the space of body interior can be strengthened, can receive more significant effect with the end of blade enlarged diameter of leading edge.
Claims (4)
1. oblique flow or axial-flow blower is characterized in that:
Wheel hub with the driving of being rotated; With the blade more than two on every side that is disposed at said wheel hub,
Wherein, with said interlobate spacing be made as P, when the chord length of said blade is made as C, pitch-chord ratio P/C is more than 1.4, with the leading edge end of blade diameter of blade be made as D1, when vane trailing edge end of blade diameter is made as D2, D1＞D2.
2. oblique flow as claimed in claim 1 or axial-flow blower is characterized in that:
The sheet number of said blade is two.
3. oblique flow as claimed in claim 1 or axial-flow blower is characterized in that:
When the locational arbitrarily end of blade diameter between leading edge and the trailing edge is made as D3, D1＞D3=D2.
4. air conditioner is characterized in that:
Be equipped with outdoor unit with each described oblique flow in the claim 1～3 or axial-flow blower.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-255499 | 2010-11-16 | ||
| JP2010255499A JP2012107538A (en) | 2010-11-16 | 2010-11-16 | Axial-flow fan or diagonal-flow fan, and air conditioner mounted outdoor unit with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102661288A true CN102661288A (en) | 2012-09-12 |
Family
ID=46493408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104355146A Pending CN102661288A (en) | 2010-11-16 | 2011-11-16 | Axial-flow fan or diagonal-flow fan, and air conditioner mounted outdoor unit with same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012107538A (en) |
| CN (1) | CN102661288A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102822A (en) * | 2013-04-04 | 2015-11-25 | 三菱电机株式会社 | Propeller fan, blower device, and outdoor equipment |
| CN108661946A (en) * | 2018-07-09 | 2018-10-16 | 广东美的环境电器制造有限公司 | Fan |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275876B (en) * | 2014-05-26 | 2019-03-12 | 广东美的暖通设备有限公司 | Air-conditioner outdoor unit axial-flow windwheel and air-conditioner outdoor unit with it |
| JP6406068B2 (en) * | 2014-11-03 | 2018-10-17 | 株式会社デンソー | Blower |
| WO2016072068A1 (en) * | 2014-11-03 | 2016-05-12 | 株式会社デンソー | Blower device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06307397A (en) * | 1993-04-26 | 1994-11-01 | Hitachi Ltd | Propeller fan and air conditioner provided therewith |
| CN1289897A (en) * | 1999-09-24 | 2001-04-04 | 松下电器产业株式会社 | Impeller for fun, fun therewith and air conditioner with the fun |
| CN1417481A (en) * | 2001-11-09 | 2003-05-14 | 松下电器产业株式会社 | Blower vane wheel for air conditioner |
| CN1616832A (en) * | 2003-11-10 | 2005-05-18 | 东芝开利株式会社 | Propeller type fan and outdoor unit of air conditioner using said fan |
| CN1847669A (en) * | 2005-04-06 | 2006-10-18 | 松下电器产业株式会社 | Air feeder vane wheel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR880004203A (en) * | 1986-09-05 | 1988-06-02 | 클라우드 에이. 포쓰 | Air flow |
| JPH01315697A (en) * | 1988-06-16 | 1989-12-20 | Nippon Denso Co Ltd | Axially flow fan |
| JP2730344B2 (en) * | 1991-09-19 | 1998-03-25 | 三菱電機株式会社 | Blower impeller |
| JP2003269385A (en) * | 2002-03-14 | 2003-09-25 | Mitsubishi Electric Corp | Air blower |
| JP2005121310A (en) * | 2003-10-17 | 2005-05-12 | Hitachi Ltd | Air conditioner |
| JP4631563B2 (en) * | 2005-06-29 | 2011-02-16 | パナソニック株式会社 | Blower |
-
2010
- 2010-11-16 JP JP2010255499A patent/JP2012107538A/en active Pending
-
2011
- 2011-11-16 CN CN2011104355146A patent/CN102661288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06307397A (en) * | 1993-04-26 | 1994-11-01 | Hitachi Ltd | Propeller fan and air conditioner provided therewith |
| CN1289897A (en) * | 1999-09-24 | 2001-04-04 | 松下电器产业株式会社 | Impeller for fun, fun therewith and air conditioner with the fun |
| CN1417481A (en) * | 2001-11-09 | 2003-05-14 | 松下电器产业株式会社 | Blower vane wheel for air conditioner |
| CN1616832A (en) * | 2003-11-10 | 2005-05-18 | 东芝开利株式会社 | Propeller type fan and outdoor unit of air conditioner using said fan |
| CN1847669A (en) * | 2005-04-06 | 2006-10-18 | 松下电器产业株式会社 | Air feeder vane wheel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102822A (en) * | 2013-04-04 | 2015-11-25 | 三菱电机株式会社 | Propeller fan, blower device, and outdoor equipment |
| CN108661946A (en) * | 2018-07-09 | 2018-10-16 | 广东美的环境电器制造有限公司 | Fan |
| CN108661946B (en) * | 2018-07-09 | 2023-09-01 | 广东美的环境电器制造有限公司 | Fan with fan body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012107538A (en) | 2012-06-07 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120912 |