CN108061059B - Fan and microwave oven - Google Patents
Fan and microwave oven Download PDFInfo
- Publication number
- CN108061059B CN108061059B CN201711487910.7A CN201711487910A CN108061059B CN 108061059 B CN108061059 B CN 108061059B CN 201711487910 A CN201711487910 A CN 201711487910A CN 108061059 B CN108061059 B CN 108061059B
- Authority
- CN
- China
- Prior art keywords
- fan
- blade
- blades
- hub
- axial
- 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.)
- Active
Links
- 230000005484 gravity Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 11
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 3
- 238000010411 cooking Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 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
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
-
- 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
- F04D29/386—Skewed blades
-
- 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
- F04D29/388—Blades characterised by construction
-
- 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
- F04D29/663—Sound attenuation
-
- 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
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fan and a microwave oven, wherein the fan (20) comprises a hub (21) and a plurality of blades (22) with the same shape, and the blades (22) are uniformly spaced along the circumferential direction of an outer ring (211) of the hub (21) and form dislocation along the axial direction of the hub (21). In the fan of the present invention, the fundamental frequency (i=1) of the original fan can be dispersed to different frequencies by reasonably controlling the misalignment distance of the blades in the axial direction of the hub. The method is used for destroying the air flow resonance phenomenon generated when the blades and fixed barriers (such as a bracket, a transformer or a frequency converter, a magnetron and the like) at the upstream and the downstream are mutually interfered, dispersing the energy distribution, playing a good role in controlling the discrete noise of the fan, improving the aerodynamic performance of the fan to a certain extent, and finally obtaining the redistribution of the noise energy and the reduction of the total sound power level.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a fan and a microwave oven.
Background
A microwave oven is a modern cooking hob for heating food with microwaves. Microwaves are an electromagnetic wave. The microwave oven consists of power source, magnetron, control circuit, cooking cavity and other parts. The interior of the microwave oven mainly utilizes the axial flow fan component to radiate heat of components such as a transformer or a frequency converter, a magnetron and the like. The axial flow fan assembly mainly comprises fan blades, a collecting cover, a fan bracket and a motor. In the running process of the axial flow fan, the flow and the noise are in positive correlation. When the rotation speed of the fan is increased, the flow is increased, the noise level of the fan is correspondingly improved, the loss of the motor is increased due to the high rotation speed of the motor, the cost is increased, and meanwhile, the problems of reliability and safety are caused. With the great improvement of the living standard of people, the noise problem of fans is more and more concerned, and the high air quantity and low noise are the development trend of fan products.
At present, a conventional axial flow fan adopts a blade arrangement mode with uniformly distributed circumferential directions, and along with the periodical rotation of the fan, discrete noise with a fundamental frequency peak value can be generated. The frequency depends on the number of blades, the arrangement of the blades and the rotational speed of the fan, while the peak fundamental frequency plays a decisive role in the total sound pressure level of the discrete noise.
In general, the blade passing frequency of a fan in which blades are uniformly arranged is:
f＝nzi/60
Wherein n is the rotating speed of the fan per minute and rpm;
z, the number of blades of the fan;
i is 1,2,3, … …, harmonic sequence number.
When the blades are uniformly arranged, the fan rotates to form self noise; in addition, periodic interactions occur between the fan and the surrounding collector hood wall surfaces, and sound pressure pulsations formed by periodic impingement of the wake airflow of the blades on downstream objects are accumulated on the blade passing frequency and harmonic frequencies thereof, so that the discrete noise has higher sound pressure level.
Disclosure of Invention
The invention aims to provide a fan which has the advantages of large air quantity and low noise.
In order to achieve the above object, the present invention provides a fan including a hub and a plurality of blades having the same shape, the plurality of blades being arranged at equal intervals in a circumferential direction of an outer ring of the hub and being offset in an axial direction of the hub.
Preferably, the whole circle in the circumferential direction of the fan comprises a plurality of groups of blade groups which are alternately arranged, the blade groups comprise a plurality of blades which are circumferentially and equally spaced and have the same axial position, and the blade groups are mutually staggered along the axial direction.
Preferably, the axial chord length of the tip of each blade is d, and the maximum axial dislocation distance C between the blade groups is not greater than 30% by d.
Preferably, c= (15% -25%) d.
Preferably, the fan includes a first blade group and a second blade group, and an axial offset distance between a second blade in the second blade group and a first blade in the first blade group is (15% -25%). D.
Preferably, the fan comprises a first blade group, a second blade group and a third blade group, wherein the axial dislocation distance between the second blade in the second blade group and the first blade in the first blade group is C1, and the axial dislocation distance between the third blade in the third blade group and the first blade in the first blade group is C2, so that C1< C2 is less than or equal to C.
Preferably, c1= (10% -15%) ×d, c2= (15% -25%) ×d.
Preferably, the fan comprises 2 to 4 sets of said blades and/or the fan comprises 4 to 12 blades.
Preferably, the blade is a forward-curved blade having a center-of-gravity stacking line curved forward in a circumferential direction along a rotation direction of the fan;
Or the blade is a forward swept blade curved in the axial direction of the hub against the incoming flow,
The center of gravity stacking line of the blade comprises a straight line section extending along the radial direction and an arc section extending from the radial outer end of the straight line section along the axial direction in a bending way.
Preferably, the fan is an axial flow fan.
In addition, the invention also provides a microwave oven which comprises the fan.
In the fan of the invention, the passing frequency of the blades is remodulated by reasonably controlling the dislocation distance of the blades along the axial direction of the hub. The method can destroy the air flow resonance phenomenon generated when the blades and fixed barriers (such as a bracket, a transformer or a frequency converter, a magnetron and the like) at the upstream and the downstream are mutually interfered, and can disperse the fundamental frequency of the original fan to different frequencies, so that the energy distribution is dispersed, the discrete noise of the fan is well controlled, and in addition, the aerodynamic performance of the fan is improved to a certain extent on the basis.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a perspective view of a fan according to an embodiment of the present invention;
FIG. 2 is a front view of a fan including 2 sets of blade sets according to one embodiment of the present invention;
FIG. 3 is a front view of a fan according to another embodiment of the present invention, the fan including 3 sets of blades;
FIG. 4 is a top view of a fan showing the center of gravity stacking line of blades, which are forward curved blades, according to an embodiment of the present invention;
FIG. 5 is a perspective view of a fan showing the center of gravity stacking line of blades, which are forward swept blades, according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating an internal structure of a microwave oven according to an embodiment of the present invention;
fig. 7 is an exploded view of the fan assembly.
Description of the reference numerals
1. Cavity 2 fan assembly
3. Bottom plate 4 transformer
5. Power line bifurcation 6 back plate
7. Magnetron with a magnetron body having a plurality of magnetron electrodes
20. Fan 21 hub
22. Blade 24 collector
25. Bracket 26 motor
211. Outer ring 221 gravity center stacking line
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions.
The present invention provides a novel fan, as shown in fig. 1, the fan 20 includes a hub 21 and a plurality of blades 22 having the same shape, the plurality of blades 22 being equally spaced apart along a circumference of an outer ring 211 of the hub 21 and being offset in an axial direction of the hub 21. Therefore, in the fan 20 of the present invention, by reasonably controlling the dislocation distance of the blades 22 along the axial direction of the hub 21, the fundamental frequency (i=1) of the original fan can be dispersed to different frequencies, the energy distribution is dispersed, the discrete noise of the fan 20 is well controlled, and the aerodynamic performance of the fan 20 can be improved to a certain extent.
In the fan 20 of the present invention, a plurality of blades 22 of the fan 20 are first grouped, that is, a circumferential full circle of the fan 20 includes a plurality of groups of blades 22 alternately arranged, the groups of blades include a plurality of blades 22 circumferentially equally spaced and axially positioned at the same position, and the groups of blades are offset from each other in an axial direction. Wherein the number of each blade group may be 1,2 or more. The dynamic balance effect of the fan 20 can be also satisfied by axially staggering the form of the blade groups of the fan 20 to disperse the fundamental frequency (i=1) of the existing original fan to the frequencies of the corresponding different blade groups of the fan 20 of the present invention to disperse the distribution of energy, and simultaneously, arranging a plurality of groups of blade groups alternately along the entire circumference of the outer ring 211.
As shown in fig. 2 and 3, the axial chord length of the tip of each blade 22 is d, and the maximum axial misalignment distance C between the blade groups is not greater than 30% by d. I.e. the axial misalignment distance C between the blade sets is not too large.
Further, c= (15% -25%) is preferable. At this time, the fan 20 has the best noise reduction effect and the better heat dissipation performance.
In the fan 20 according to an embodiment of the present invention as shown in fig. 2, the fan 20 is divided into 2 blade groups. Wherein the fan 20 comprises a first blade set and a second blade set, and the axial offset distance between the second blade in the second blade set and the first blade in the first blade set is preferably (15% -25%) ×d.
In the fan 20 according to another embodiment of the present invention as shown in fig. 3, the fan 20 is divided into 3 blade groups. The fan 20 includes a first blade group, a second blade group, and a third blade group, where an axial misalignment distance between a second blade in the second blade group and a first blade in the first blade group is C1, and an axial misalignment distance between a third blade in the third blade group and a first blade in the first blade group is C2, so as to satisfy C1< C2 be less than or equal to C.
Preferably, c1= (10% -15%) ×d, c2= (15% -25%) ×d.
In the fan 20 of the present invention, the fan 20 preferably includes 2 to 4 sets of blades, and/or the fan includes 4 to 12 blades 22.
Experiment one, the noise effect test and the temperature rise test were performed on the fan 20 of the present invention and the existing original fan using the above-described blade group divided into 2 groups, respectively, and the axial misalignment distance C (ratio with respect to d) of the fan 20 of the present invention was appropriately modulated, where d is the axial chord length of the tip of the blade, the noise effect of which was measured as shown in table 1, and the heat dissipation effect of each component in the microwave oven (see fig. 6) was measured as shown in table 2, wherein the total number of fan blades 22 was 6.
Table 1 noise data for fan with two blade sets axially offset
Table 2 test results of two blade sets axial misalignment for temperature rise of main heat sink of microwave oven
Experiment two, the noise effect test and the temperature rise test were performed on the fan 20 of the present invention and the existing original fan using the above-described 3-group blade group, respectively, and the axial misalignment distance C (including C1, C2, ratio with respect to d) of the fan 20 of the present invention was appropriately modulated, where d is the axial chord length of the tip of the blade, the noise effect of which was measured as shown in table 3, and the heat dissipation effect of which was measured on each component in the microwave oven (see fig. 6) was measured as shown in table 4, wherein the fan blades 22 were each 6-blade fans as an example.
TABLE 3 noise data for fan with three blade sets axially offset
Table 4 test results of three blade sets with axial misalignment for temperature rise of main heat sink of microwave oven
By the two groups of experiments, analysis results in: c= (15% -25%) ×d, or c1= (10% -15%) ×d, c2= (15% -25%) ×d, at this time, the noise reduction effect of the fan 20 is best, and the heat dissipation performance is also better. It can be seen that, by using the method of grouping the blades 22 and axially dislocating the blades by a certain distance, the air flow resonance phenomenon generated when the blades 22 interfere with the fixed obstacles (such as the bracket 25, the transformer 4 or the frequency converter, the magnetron 7, etc.) at the upstream and downstream (with respect to the wind flow direction) can be destroyed, so that the noise reduction and the heat dissipation of the fan 20 are better. In addition, each blade group is axially staggered so that the passing frequency of the blade 22 is modulated again, and the energy of the significant noise peak corresponding to the passing frequency of the blade 22 is dispersed to the side frequency bands of a series of blade groups, so that the effects of noise energy redistribution and total noise power level reduction are obtained.
In general, in a cooling fan, a curve obtained by connecting the centers of gravity of blade profiles at different blade heights is called a center-of-gravity stacking line of blades. In particular, in the fan 20 of the present invention, as shown in fig. 4, the blades 22 are forward-curved blades whose center-of-gravity stacking line 221 is curved forward in the circumferential direction of the rotation direction of the fan 20. Or in the fan 20 shown in fig. 5, the blades 22 are forward swept blades curved in the axial direction of the hub 21 against the incoming flow direction. Wherein the center of gravity stacking lines 221 of the blades 22 each include a straight line segment extending in a radial direction and an arc segment extending from a radially outer end of the straight line segment in a curved direction in an axial direction.
When the forward-curved blade 22 of the fan 20 shown in fig. 4 is used, the air flow resonance phenomenon can be improved because the impact time of the incoming flow at different blade heights with the front edge of the blade 22 is changed. On the other hand, the forward bending blade can also effectively inhibit wake resonance phenomenon, so as to achieve the purpose of noise reduction. In addition, the forward curved blades help improve radial flow at the tip, reducing aerodynamic losses at the tip corner of the blades 22, thereby improving the operating efficiency of the fan 20.
Or when the fan 20 shown in fig. 5 is adopted, the forward-swept blade 22 is adopted to improve the pressure distribution on the surface of the blade 22, so that the tip vortex at the top and the horseshoe vortex at the front edge of the blade root are effectively inhibited, the vortex range in the channel is reduced, and the working efficiency of the fan 20 is improved. On the other hand, the radial pressure distribution of the swept blades results in a reduction in boundary layer thickness in the majority of the high blade area, effectively controlling radial blending of flow, which is beneficial for reducing noise of the fan 20.
By the design of the forward bending type or forward skimming type blades, the forward bending angle or forward skimming angle of the blades can be further adjusted, and the noise and the heat dissipation effect of the fan 20 can be further improved.
Meanwhile, the fan 20 of the present invention is a general axial flow fan 20.
In addition, the present invention also provides a microwave oven provided with the fan 20 as described above, as shown in fig. 6. The microwave oven therefore also includes all the advantages of the fan 20 of the present invention, which will not be described in detail.
The microwave oven comprises a bottom plate 3, a rear plate 6, a magnetron 7, a transformer 4 or a frequency converter, a microwave oven heating cavity 1, a power line bifurcation 5, a high-voltage diode and a fan assembly 2. As shown in fig. 7, the fan assembly 2 includes a fan 20, a collector cap 24, a bracket 25, and a motor 26. Typically, the transformer 4 or the inverter is used to supply power to the magnetron 7, the magnetron 7 generates microwaves to heat the food in the cavity 1, and the fan assembly 2 dissipates heat from the magnetron 7 and the transformer 4 or the inverter. Wherein, the cavity 1 and the transformer 4 or the frequency converter are fixed on the bottom plate 3, the magnetron 7 is fixed on the cavity 1, the bracket 25 is fixed on the back plate 6 by a screw, the motor 26 is fixed on the bracket 25, and the rotating shaft of the motor 26 passes through the rotating shaft mounting part of the fan 20.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (5)
1. A fan comprising a hub (21) and a plurality of blades (22) of the same shape, characterized in that the fan is an axial flow fan, the plurality of blades (22) are equally spaced along the circumference of an outer ring (211) of the hub (21) and form a dislocation along the axial direction of the hub (21);
The circumferential whole circle of the fan (20) comprises a plurality of groups of blade groups which are alternately arranged, the blade groups comprise a plurality of blades (22) which are circumferentially and equally spaced and have the same axial position, and the blade groups are mutually staggered along the axial direction;
The axial chord length of the blade tip of each blade (22) is d, and the maximum axial dislocation distance C between the blade groups is not more than 30% d;
The fan (20) comprises a first blade group, a second blade group and a third blade group, wherein the axial dislocation distance between a second blade in the second blade group and a first blade in the first blade group is C1, and the axial dislocation distance between a third blade in the third blade group and the first blade in the first blade group is C2, so that the condition that C1< C2 is less than or equal to C is satisfied;
Wherein c1= (10% -15%). D, c2= (15% -25%). D.
2. The fan of claim 1, wherein c= (15% -25%) d.
3. Fan according to claim 1, characterized in that the fan (20) comprises 2-4 sets of said blades and/or that the fan (20) comprises 4-12 of said blades (22).
4. A fan according to any one of claims 1 to 3, wherein the blade (22) is a forward-curved blade having a center-of-gravity stacking line (221) curved forward in a circumferential direction along a rotation direction of the fan (20);
Or the blade (22) is a forward swept blade curved in the axial direction of the hub (21) against the incoming flow direction,
The center of gravity stacking line (221) of the blade (22) comprises a straight line section extending along the radial direction and an arc section bending and extending along the axial direction from the radial outer end of the straight line section.
5. A microwave oven, characterized in, that the microwave oven comprises the fan (20) according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711487910.7A CN108061059B (en) | 2017-12-30 | 2017-12-30 | Fan and microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711487910.7A CN108061059B (en) | 2017-12-30 | 2017-12-30 | Fan and microwave oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108061059A CN108061059A (en) | 2018-05-22 |
| CN108061059B true CN108061059B (en) | 2024-04-30 |
Family
ID=62141027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711487910.7A Active CN108061059B (en) | 2017-12-30 | 2017-12-30 | Fan and microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108061059B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2575297B (en) * | 2018-07-05 | 2021-05-19 | Dyson Technology Ltd | An axial impeller |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6477799A (en) * | 1987-09-18 | 1989-03-23 | Matsushita Seiko Kk | Axial-flow blower |
| KR20020075660A (en) * | 2001-03-27 | 2002-10-05 | 한라공조주식회사 | Cooling fan |
| CN1818395A (en) * | 2006-03-16 | 2006-08-16 | 上海交通大学 | Impeller with staggered leaf on front edge |
| RU2009123083A (en) * | 2009-06-16 | 2010-12-27 | Общество с ограниченной ответственностью Научно-исследовательский и опытно-конструкторский институт "АЭРОТУРБОМАШ" (RU) | DRIVING WHEEL OF REVERSE AXIAL FAN |
| CN204663981U (en) * | 2015-04-21 | 2015-09-23 | 成都华川电装有限责任公司 | Motor car engine blade structure |
| CN205277913U (en) * | 2015-12-02 | 2016-06-01 | 珠海格力电器股份有限公司 | Not leafy axial compressor fan blade of equidistance and electric fan |
| CN207961054U (en) * | 2017-12-30 | 2018-10-12 | 广东美的厨房电器制造有限公司 | Fan and micro-wave oven |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070154314A1 (en) * | 2005-12-29 | 2007-07-05 | Minebea Co., Ltd. | Reduction of tonal noise in cooling fans using splitter blades |
| TWI328081B (en) * | 2007-04-04 | 2010-08-01 | Delta Electronics Inc | Fan and impeller thereof |
| US20160146040A1 (en) * | 2014-11-25 | 2016-05-26 | United Technologies Corporation | Alternating Vane Asymmetry |
-
2017
- 2017-12-30 CN CN201711487910.7A patent/CN108061059B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6477799A (en) * | 1987-09-18 | 1989-03-23 | Matsushita Seiko Kk | Axial-flow blower |
| KR20020075660A (en) * | 2001-03-27 | 2002-10-05 | 한라공조주식회사 | Cooling fan |
| CN1818395A (en) * | 2006-03-16 | 2006-08-16 | 上海交通大学 | Impeller with staggered leaf on front edge |
| RU2009123083A (en) * | 2009-06-16 | 2010-12-27 | Общество с ограниченной ответственностью Научно-исследовательский и опытно-конструкторский институт "АЭРОТУРБОМАШ" (RU) | DRIVING WHEEL OF REVERSE AXIAL FAN |
| CN204663981U (en) * | 2015-04-21 | 2015-09-23 | 成都华川电装有限责任公司 | Motor car engine blade structure |
| CN205277913U (en) * | 2015-12-02 | 2016-06-01 | 珠海格力电器股份有限公司 | Not leafy axial compressor fan blade of equidistance and electric fan |
| CN207961054U (en) * | 2017-12-30 | 2018-10-12 | 广东美的厨房电器制造有限公司 | Fan and micro-wave oven |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108061059A (en) | 2018-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2469101A1 (en) | Axial fan | |
| CN204329267U (en) | Air-conditioner outdoor unit and air outlet grate thereof | |
| CN108061059B (en) | Fan and microwave oven | |
| CN104501381B (en) | Air-conditioner outdoor unit and its air outlet grate | |
| CN208831287U (en) | Fan and micro-wave oven | |
| US20050084378A1 (en) | Radial fan wheel for transporting cooling air for an electric machine | |
| CN108561332B (en) | Fan and microwave oven | |
| CN207961054U (en) | Fan and micro-wave oven | |
| CN108105154B (en) | Fan and microwave oven | |
| CN208831320U (en) | Fan and micro-wave oven | |
| CN108180169A (en) | Fan and micro-wave oven | |
| CN1430019A (en) | Cooling fan for microwave oven | |
| CN207960997U (en) | Fan and micro-wave oven | |
| CN207961058U (en) | Fan and micro-wave oven | |
| CN210531228U (en) | Impeller of multi-wing centrifugal fan and bathroom heater | |
| CN207961055U (en) | Fan and micro-wave oven | |
| CN207960998U (en) | Fan and micro-wave oven | |
| CN207961051U (en) | Fan and micro-wave oven | |
| CN109645848B (en) | Electric cooking appliance | |
| CN204900329U (en) | Fan wheel , centrifugal fan and domestic appliance | |
| CN213744134U (en) | Fan and cooking utensil with same | |
| CN208831286U (en) | Fan and micro-wave oven | |
| CN208605396U (en) | A kind of wind wheel | |
| CN214404100U (en) | Connecting blade with rib, fan and radiator | |
| CN207962751U (en) | Micro-wave oven |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |