CN110410879A - A kind of blade tip is in the air-conditioner outdoor unit of W type structure - Google Patents
A kind of blade tip is in the air-conditioner outdoor unit of W type structure Download PDFInfo
- Publication number
- CN110410879A CN110410879A CN201910808832.9A CN201910808832A CN110410879A CN 110410879 A CN110410879 A CN 110410879A CN 201910808832 A CN201910808832 A CN 201910808832A CN 110410879 A CN110410879 A CN 110410879A
- Authority
- CN
- China
- Prior art keywords
- air
- outdoor unit
- conditioner outdoor
- impeller
- blade tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims description 6
- 210000001124 body fluid Anatomy 0.000 claims description 3
- 239000010839 body fluid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- 235000011389 fruit/vegetable juice Nutrition 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000004378 air conditioning Methods 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000007634 remodeling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 208000016285 Movement disease Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/40—Vibration or noise prevention at outdoor units
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The present invention relates to the technical fields of air-conditioner outdoor unit energy-saving and noise-reducing, more particularly to a kind of blade tip is in the air-conditioner outdoor unit impeller of W type structure, it is characterised in that it includes blade tip is in impeller, heat exchanger, pod, electric machine support, middle partition, Air outlet net, condenser, fluid reservoir, the flow controller, compressor of W type structure.A kind of blade tip provided by the invention is in the air-conditioner outdoor unit of W type structure, slots in air-conditioner outdoor unit impeller blade blade tip, W type structure is presented; design improved to blade tip structure under the premise of not increasing cost, simple process, expense is low; juice is set convenient for integration, is produced on a large scale.Simultaneously, under the premise of the other component overall performance of guarantee air-conditioner outdoor unit is constant, improve air-conditioner outdoor unit exit velocity, reduce air-conditioner outdoor unit aerodynamic noise, reduce the flow losses of air-conditioner outdoor unit, the intrinsic frequency for improving air-conditioner outdoor unit impeller, improves the efficiency of air-conditioner outdoor unit, increases air-conditioner outdoor unit service life.
Description
Technical field
It is in W type structure the present invention relates to the technical field of air-conditioner outdoor unit energy-saving and noise-reducing more particularly to a kind of blade tip
Air-conditioner outdoor unit.
Background technique
With the progress of society and the development of science and technology, people's lives leveling qualities significantly improve, air-conditioning is not re-used as one
Kind luxury goods household electrical appliance, have progressed among ordinary family, thus people's lives mode also starts to change, throughout the year
It is cool in summer and warm in winter.But indoor bring comfortably with facilitating while, also to outdoor propagation noise, these noises not only be will affect
To indoor user, self sense is reduced, the environment of surrounding but will be influenced, it is tired in life and work to give other people
It disturbs, reduces other people happiness.Moreover, noise originally becomes a big key factor of municipal pollution, and outside air conditioning chamber
The noise of machine is also used as a part in noise pollution source, to this it is desirable to be paid attention in terms of air-conditioning noise reduction, this also at
A much progress for air-conditioning manufacturing requires and huge challenge.
In terms of the flow losses and aerodynamic noise for reducing air-conditioner outdoor unit, the research contents for improving pneumatic efficiency, the world
The researcher of various regions is proposed different research methods, and wherein the method for experimental method and numerical simulation is probed into outside air conditioning chamber
The main method of machine aerodynamic noise.Such as using numerical simulation research method research air-conditioner outdoor unit aerodynamic noise trend and
The mode that experimental method combines is verified, and is a kind of research method of worth reference.Remodeling is by optimization blade wheel structure ginseng
It counts and designs new impeller to change air-conditioner outdoor unit aerodynamic characteristic, to reduce air-conditioner outdoor unit aerodynamic noise, but change leaf
Wheel construction parameter and the new impeller of design can all change air-conditioner outdoor unit blade wheel structure kinetic characteristics, problem made to become complicated, make
Influence factor increases, and it is difficult to increase research.
In the energy loss of air-conditioner outdoor unit, flow losses are to influence one of the principal element of its drafting efficiency.Due to
There are gaps between impeller and air-conditioner outdoor unit single-piece frame, in impeller normal rotation, so that impeller rotary area forms disorder
Vortex, to cause flow losses.To reduce the flow losses because of caused by impeller rotation, domestic and international researcher passes through to air-conditioning
The blade of outdoor unit retrofits and then probes into air-conditioner outdoor unit in the mobile performance of impeller rotary area, has obtained blade tip cutting
Afterwards, air-conditioner outdoor unit internal vortex disturbance state is improved, and the cutting profile and cutting quantity of air-conditioner outdoor unit blade tip,
All directly affect the drafting efficiency and aerodynamic noise of air-conditioner outdoor unit.
A kind of blade tip provided by the invention is in the air-conditioner outdoor unit of W type structure, is not changing the whole of air-conditioner outdoor unit
In the case where body internal structure, by carrying out Transform Type design to blade tip structure, the aerodynamic noise of air-conditioner outdoor unit is reduced, is mentioned
High drafting efficiency improves the stress condition of blade, reduces the degree of fatigue of blade, improves the intrinsic frequency of air-conditioner outdoor unit impeller
Rate increases the service life of air-conditioner outdoor unit, provides opposite design experiences and theoretical empirical for the work of air-conditioner outdoor unit noise reduction.
Summary of the invention
A kind of air-conditioner outdoor unit provided by the invention is slotted at blade tip, makes blade tip structure change, and W is presented
Type structure is set in the case where not changing the whole interior structure of air-conditioner outdoor unit by carrying out remodeling to blade tip structure
Meter reduces the aerodynamic noise of air-conditioner outdoor unit, improves drafting efficiency, improves the stress condition of blade, reduce the tired journey of blade
Degree improves the intrinsic frequency of air-conditioner outdoor unit impeller, increases the service life of air-conditioner outdoor unit.
A kind of blade tip provided by the invention is in the air-conditioner outdoor unit of W type structure, including impeller body, impeller body
Blade tip position has W type structure grooving.
A kind of air-conditioner outdoor unit provided by the invention is in impeller, heat exchanger, the water conservancy diversion of W type structure including blade tip
Cover, electric machine support, middle partition, Air outlet net, condenser, fluid reservoir, flow controller, compressor etc..Wherein heat exchanger, pod,
Electric machine support, middle partition and Air outlet net successively constitute the ducting system of air-conditioner outdoor unit, and wherein blade tip is in the blade of W type structure
Composition air-conditioner outdoor unit impeller, air-conditioner outdoor unit impeller on impeller is separately fixed to be located in air-conditioner outdoor unit ducting system body,
The condenser, flow controller, is located in air-conditioner outdoor unit body fluid reservoir, and the compressor is during air conditioner refrigerating
Drive refrigerant.
A kind of blade tip provided by the invention is in the air-conditioner outdoor unit of W type structure, in air-conditioner outdoor unit impeller blade leaf
It slots at point, changes tip structure, W type structure is presented, remodeling is carried out to tip structure under the premise of not increasing cost and is set
Meter, simple process, expense is low, sets juice convenient for integration, is produced on a large scale.Meanwhile guaranteeing other positions of air-conditioner outdoor unit
Under the premise of performance is constant, air-conditioner outdoor unit aerodynamic noise is reduced, drafting efficiency is improved, reduces the degree of fatigue of blade, is improved
The intrinsic frequency of air-conditioner outdoor unit impeller improves the efficiency of air-conditioner outdoor unit, increases the service life of air-conditioner outdoor unit.
Detailed description of the invention
Illustrate the specific embodiment of the invention or technical solution in the prior art in order to clearer, it below will be to specific
Embodiment or attached drawing needed to be used in the description of the prior art do simple introduction, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the air-conditioner outdoor unit impeller schematic diagram that blade tip provided in an embodiment of the present invention is in W type structure；
Fig. 2 is schematic diagram of the blade tip provided in an embodiment of the present invention in the air-conditioner outdoor unit blade W type structure of W type structure；
Fig. 3 is air-conditioner outdoor unit impeller rotary area noise calculation point arrangement schematic diagram provided in an embodiment of the present invention；
Fig. 4 is the most loud of air-conditioner outdoor unit impeller rotary area noise before and after blade tip provided in an embodiment of the present invention is retrofited
The change curve arbitrarily downgraded when away from the section center of circle (i.e. center of rotation axis) different distance.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that the embodiment retouched
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless there are specific regulation and limit, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, can also can dismantling connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected: can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As depicted in figs. 1 and 2, a kind of blade tip provided by the invention is in the air-conditioner outdoor unit of W type structure, including impeller
Ontology, the blade tip part of impeller have W type grooving, and blade tip includes cutting groove depth h, grooving in the geometric parameter of W type structure
Width a, grooving angle, θ, W type spacing d.
A kind of air-conditioner outdoor unit provided by the invention is in impeller, heat exchanger, the water conservancy diversion of W type structure including blade tip
Cover, electric machine support, middle partition, Air outlet net, condenser, fluid reservoir, flow controller, compressor etc..Wherein heat exchanger, pod,
Electric machine support, middle partition and Air outlet net successively constitute the ducting system of air-conditioner outdoor unit, and wherein blade tip is in the blade of W type structure
It is separately fixed at composition air-conditioner outdoor unit impeller, the air-conditioner outdoor unit impeller on impeller and is located at air-conditioner outdoor unit ducting system body
Interior, the condenser, flow controller, is located in air-conditioner outdoor unit body fluid reservoir, and compressor is driven during air conditioner refrigerating
Dynamic refrigerant.
It does not slot with blade tip to accurately calculate blade tip in basin vorticity inside the air-conditioner outdoor unit of W type structure
Variation and impeller rotary area aerodynamic noise variation characteristic, using FW-H acoustic model to the radial direction of air-conditioner outdoor unit rotary area
Upper 6 calculating points carry out numerical analysis, and specific noise calculation point arrangement is as shown in Figure 3.The definition of its zoning 3-D walls and floor
For using air-conditioner outdoor unit impeller rotary area center as coordinate origin, outlet axes direction is Z axis positive direction, to cross origin
Orthogonal radial direction is respectively X, Y-axis two-by-two, and establishes coordinate system as positive direction to be directed toward direction of air outlet, and noise calculation is cut
It is section (Z=0mm) that the Z axis in face, which takes three coordinate positions, takes 6 noise calculations respectively in the radial direction, that is, Y direction in section
Point, its axial coordinate of Y is respectively 80mm, 100mm, 120mm, 140mm, 160mm, 180mm.
In the present embodiment, designed blade tip W molded dimension is cutting groove depth h=10mm, notch width a=23mm, grooving
Angle, θ=60 °, W type spacing d=10mm, and compared with impeller blade of not retrofiting.It is 820 r/ of rated speed in wheel speed
When min, analysis impeller rotary area air conditioning chamber when blade is not retrofited with blade tip in W type structure is calculated using large eddy simulation
The vorticity variation in basin, the vorticity value for the outdoor unit impeller rotary area that blade is not retrofited are 218.7s inside outer machine-1, blade and blade
Point is 192.5s in the vorticity value of the outdoor unit impeller rotary area of W type structure-1, vorticity has dropped 11.98%.It follows that leaf
Piece blade tip can effectively break up the vorticity of air-conditioner outdoor unit impeller rotary area in W type structure, and blade tip makes in W type structure
The phenomenon that vorticity for obtaining impeller internal basin is reduced, movement disorder is improved, and energy loss is minimized, and improves air conditioning chamber
The efficiency of outer machine extends ventilation blower service life.
In the present embodiment, impeller is at same nominal revolving speed 820r/min, respectively to not retrofiting and blade tip is in W type
The noise pattern of the noise calculation point of the air-conditioner outdoor unit impeller rotary area of structure is analyzed, the rotation of air-conditioner outdoor unit impeller
The aerodynamic noise for turning region is mainly made of the rotation fundamental frequency and harmonic wave of impeller, vortex shedding frequence, wherein maximum sound pressure level
Corresponding frequency is the rotation fundamental frequency 40.04Hz of impeller.From fig. 4, it can be seen that the noise pattern of each noise measuring point is analyzed,
Each maximum sound pressure level for calculating noise at point is obtained, with Y axis coordinate value, that is, noise calculation point away from the section center of circle (i.e. rotation center
Axis) distance be abscissa, calculating maximum sound pressure level a little is ordinate, and it is in W type structure that comparison, which is not retrofited with blade tip,
Noise maximum sound pressure level change curve it is found that blade tip is obviously reduced in the sound pressure level of W type structure, apart from hub centre
At 80mm, blade tip is 101.5dB in the maximum sound pressure level of W type structure, and the maximum sound pressure level that blade is not retrofited is
102.1dB；At hub centre 100mm, blade tip is 106.1dB in the maximum sound pressure level of W type structure, and blade does not change
The maximum sound pressure level of type is 108.6dB；At hub centre 120mm, blade tip is in that the maximum sound pressure level of W type structure is
105.4dB, the maximum sound pressure level that blade is not retrofited are 108.3dB；At hub centre 140mm, blade tip is in W type knot
The maximum sound pressure level of structure is 104.8dB, and the maximum sound pressure level that blade is not retrofited is 108.8dB；Apart from hub centre 160mm
Place, blade tip are 104.2dB in the maximum sound pressure level of W type structure, and the maximum sound pressure level that blade is not retrofited is 108.2dB；In
At hub centre 180mm, blade tip is 101.3dB in the maximum sound pressure level of W type structure, and blade is not retrofited most loud
It arbitrarily downgrades as 103.8dB；Blade tip averagely reduces 2.58% than the noise that blade is not retrofited in W type structure.
In the present embodiment, under the excitation of the exciting force of 10N, test discovery blade tip compares blade in the impeller of W type
Each rank intrinsic frequency for the impeller that do not retrofit increased, wherein blade tip is in the intrinsic frequency of impeller of W type structure in single order
Rate is 44.74Hz, and the impeller intrinsic frequency that blade is not retrofited is 40.56Hz, and intrinsic frequency improves 10.3%；In second order, leaf
Piece blade tip is 48.72Hz in the impeller intrinsic frequency of W type structure, and the impeller intrinsic frequency that blade is not retrofited is 42.71Hz, inherently
Frequency improves 14.07%；In three ranks, blade tip is 66.94Hz in the impeller intrinsic frequency of W type structure, and blade is not retrofited
Impeller intrinsic frequency be 59.56Hz, intrinsic frequency improve 12.3%；In quadravalence, blade tip is solid in the impeller of W type structure
Having frequency is 71.24Hz, and the impeller intrinsic frequency that blade is not retrofited is 61.72Hz, and intrinsic frequency improves 15.42%.This and blade
Leaf quality reduction will lead to blade this conclusion of the increase of intrinsic frequency and be consistent in the formula of intrinsic frequency.
By the remodeling to blade tip structure, blade tip provided by the invention is in the air-conditioner outdoor unit of W type structure, In
Under the premise of taking into account air-conditioner outdoor unit other component performance, reduce inside the aerodynamic noise and air-conditioner outdoor unit of air-conditioner outdoor unit
Fluid improves the stress condition of blade and the turbulent condition of air-conditioner outdoor unit internal flow because of flow losses caused by being vortexed,
Reduce the degree of fatigue of blade, improves the intrinsic frequency of air-conditioner outdoor unit impeller, extend the service life of air-conditioner outdoor unit.
Finally, it should be noted that the above various embodiments is only used to illustrate the technical scheme of the present invention, rather than its limitations；To the greatest extent
Invention is explained in detail referring to aforementioned symbol embodiment for pipe, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (2)
1. the air-conditioner outdoor unit that a kind of blade tip is in W type structure, which is characterized in that including impeller body, the leaf of impeller body
Piece blade tip position has W type grooving；
The blade tip W type structural parameters are cutting groove depth h=10mm, notch width a=23mm, grooving angle, θ=60 °, W type
Spacing d=10mm；
The air-conditioner outdoor unit averagely reduces 11.98% than the air-conditioner outdoor unit impeller rotary area vorticity that blade is not retrofited；
The air-conditioner outdoor unit averagely reduces 2.58% than the air-conditioner outdoor unit impeller rotary area noise that blade is not retrofited；
The air-conditioner outdoor unit improves 10.3%, In in single order than the intrinsic frequency for the air-conditioner outdoor unit impeller that blade is not retrofited
14.07% is improved when second order, improves 12.3% in three ranks, improves 15.42% in quadravalence.
2. a kind of air-conditioner outdoor unit it is characterised in that it includes blade tip as described in claim 1 in W type structure impeller,
Heat exchanger, pod, electric machine support, middle partition, Air outlet net, condenser, fluid reservoir, flow controller, compressor；
The heat exchanger, pod, electric machine support, middle partition and Air outlet net successively constitute the air duct system of air-conditioner outdoor unit
System, the blade tip are separately fixed at composition air-conditioner outdoor unit impeller, the air-conditioner outdoor unit leaf on impeller in the blade of W type structure
Wheel is located in air-conditioner outdoor unit ducting system body, and the condenser, flow controller, is located in air-conditioner outdoor unit body fluid reservoir,
The compressor is to drive refrigerant during air conditioner refrigerating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910808832.9A CN110410879A (en) | 2019-08-29 | 2019-08-29 | A kind of blade tip is in the air-conditioner outdoor unit of W type structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910808832.9A CN110410879A (en) | 2019-08-29 | 2019-08-29 | A kind of blade tip is in the air-conditioner outdoor unit of W type structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110410879A true CN110410879A (en) | 2019-11-05 |
Family
ID=68369718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910808832.9A Pending CN110410879A (en) | 2019-08-29 | 2019-08-29 | A kind of blade tip is in the air-conditioner outdoor unit of W type structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110410879A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1036993B (en) * | 1974-07-02 | 1979-10-30 | Rotron Inc | DEVICE FOR THE MOVEMENT OF A FLUID |
| JP2008157117A (en) * | 2006-12-25 | 2008-07-10 | Daikin Ind Ltd | Blower and outdoor unit for air conditioner with blower |
| JP2012154221A (en) * | 2011-01-25 | 2012-08-16 | Sharp Corp | Propeller fan, metal mold for molding and fluid sending device |
| CN202579309U (en) * | 2012-03-01 | 2012-12-05 | Tcl空调器(中山)有限公司 | Fan structure and axial fan |
| JP2014206054A (en) * | 2013-04-10 | 2014-10-30 | 日立アプライアンス株式会社 | Air conditioner |
| CN107489646A (en) * | 2017-08-02 | 2017-12-19 | 奥克斯空调股份有限公司 | Sawtooth pattern noise reduction axial-flow leaf |
| CN207795681U (en) * | 2018-01-13 | 2018-08-31 | 广东美的环境电器制造有限公司 | Axial flow fan leaf, axial flow fan blade component, axial flow blower ducting assembly |
| CN110173451A (en) * | 2019-07-07 | 2019-08-27 | 代元军 | A kind of blade tip is in the mining partial axial ventilator of W type structure |
| US10400783B1 (en) * | 2015-07-01 | 2019-09-03 | Dometic Sweden Ab | Compact fan for a recreational vehicle |
-
2019
- 2019-08-29 CN CN201910808832.9A patent/CN110410879A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1036993B (en) * | 1974-07-02 | 1979-10-30 | Rotron Inc | DEVICE FOR THE MOVEMENT OF A FLUID |
| JP2008157117A (en) * | 2006-12-25 | 2008-07-10 | Daikin Ind Ltd | Blower and outdoor unit for air conditioner with blower |
| JP2012154221A (en) * | 2011-01-25 | 2012-08-16 | Sharp Corp | Propeller fan, metal mold for molding and fluid sending device |
| CN202579309U (en) * | 2012-03-01 | 2012-12-05 | Tcl空调器(中山)有限公司 | Fan structure and axial fan |
| JP2014206054A (en) * | 2013-04-10 | 2014-10-30 | 日立アプライアンス株式会社 | Air conditioner |
| US10400783B1 (en) * | 2015-07-01 | 2019-09-03 | Dometic Sweden Ab | Compact fan for a recreational vehicle |
| CN107489646A (en) * | 2017-08-02 | 2017-12-19 | 奥克斯空调股份有限公司 | Sawtooth pattern noise reduction axial-flow leaf |
| CN207795681U (en) * | 2018-01-13 | 2018-08-31 | 广东美的环境电器制造有限公司 | Axial flow fan leaf, axial flow fan blade component, axial flow blower ducting assembly |
| CN110173451A (en) * | 2019-07-07 | 2019-08-27 | 代元军 | A kind of blade tip is in the mining partial axial ventilator of W type structure |
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Application publication date: 20191105 |