CN208831287U - Fan and micro-wave oven - Google Patents
Fan and micro-wave oven Download PDFInfo
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- CN208831287U CN208831287U CN201821321746.2U CN201821321746U CN208831287U CN 208831287 U CN208831287 U CN 208831287U CN 201821321746 U CN201821321746 U CN 201821321746U CN 208831287 U CN208831287 U CN 208831287U
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- fan
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Abstract
The utility model relates to household appliance technical fields, disclose a kind of fan and micro-wave oven, the fan (20) includes multiple blades (22) on wheel hub (21) and the circumferentially spaced outer ring (211) for being arranged in the wheel hub (21), on the pressure face (27) of the blade (22), the contiguous zone of the leaf top edge (224) of the blade (22) is equipped with the multiple pits (23) being spaced apart.In the fan of the utility model, due to being additionally arranged multiple pits at the leaf top of the pressure face in blade, so that the mechanical efficiency of the fan is higher, noise content is smaller.
Description
Technical field
The utility model relates to household electrical appliance, and in particular, to a kind of fan and micro-wave oven.
Background technique
Nowadays, micro-wave oven has been widely used in people's as the apparatus for being commonly used in heating food in kitchen
Daily life.Microwave is a kind of electromagnetic wave, and micro-wave oven is by magnetron, frequency converter or transformer, control circuit and cooks cavity
It is formed Deng part.Frequency converter or transformer are used to power to magnetron, and magnetron is used to provide microwave into cooking cavity to add
Hot food.Meanwhile microwave oven internal mainly carries out the components such as transformer or frequency converter and magnetron using axial fan assembly
Heat dissipation.Axial fan assembly mainly includes flabellum, collecting cover, blower tray and motor.In aerofoil fan operational process, flow with
It is positive correlation between noise.When rotation speed of the fan increases, flow increases, and noise level can also be promoted accordingly, and electricity
The high revolving speed of machine exacerbates the loss of motor, increases cost, while also resulting in reliability, safety issue.With people
The significantly promotion of living standard, more and more attention has been paid to Gao Fengliang, low noise are fan products to the noise problem of fan
Development trend.
Conventional fan during the work time, as the blade of fan rotates and drives surrounding air to flow.Due to routine
Blade be the smooth blade in surface, contiguous zone (the i.e. leaf when air-flow flows through blade surface, usually in the leaf top edge of blade
At top) tip vortex can be generated.And blade trailing edge is gradually flowed through from blade inlet edge (blade inlet edge 222 in referring to fig. 2) in air-flow
During (blade trailing edge 221 in referring to fig. 2), tip vortex is usually initially formed in 30% chord length apart from blade inlet edge
Position, and gradually development continues, and falls off until from blade trailing edge.However, tip vortex generate region closer to blade inlet edge, then
It is easier during flow development to develop, to block the airflow path at leaf top.But the contiguous zone of leaf top edge
It is the most important acting region of fan, thus the mechanical efficiency that will cause fan is relatively low, air quantity phenomenon less than normal occurs.Together
When, with the continuous convolution of the vortex in boundary layer at leaf top, the thickness in boundary layer is also increasingly thicker, and makes windage increasingly
Greatly, it also will affect the mechanical efficiency of fan.In addition, falling off for tip vortex on the blade trailing edge of the contiguous zone of leaf top edge is easy
Biggish low frequency noise is generated, so that the noise content of fan is larger.
Utility model content
The purpose of the utility model is to provide a kind of fan, which has the advantages that air quantity is big, noise is small.
To achieve the goals above, the utility model provides a kind of fan, including wheel hub and circumferentially spaced is arranged in institute
Multiple blades on the outer ring of wheel hub are stated, on the pressure face of the blade, the contiguous zone of the leaf top edge of the blade is equipped with
The multiple pits being spaced apart.
Preferably, the pressure face is provided with the multi-row pit unit of the radial direction distribution along the blade, every row institute
Stating pit unit includes the multiple pits arranged along the extending direction uniform intervals of the leaf top edge.
Preferably, the pressure face is equipped with the pit unit of 2~5 rows.
Preferably, in the two rows pit unit adjacent in the radial direction of the blade along the extension of the leaf top edge
Direction arrangement interlaced with each other, so that each pit in the pit unit of adjacent two rows is staggered position each other.
Preferably, the contiguous zone for being distributed the pit is located at 80%~90% high region of leaf.
Preferably, the shape of the pit is hemispherical.
Preferably, the diameter of the hemispherical pit is 0.2mm~0.5mm.
Preferably, the outer ring of the wheel hub is equipped with 4~8 blades being circumferentially spacedly distributed.
Preferably, the fan is aerofoil fan.
In addition, the utility model additionally provides a kind of micro-wave oven, the micro-wave oven includes magnetron, frequency converter and above-mentioned
The fan, the fan are arranged towards the magnetron and frequency converter.
Through the above technical solutions, as it can be seen that compared to the existing fan with smooth blades, in the wind of the utility model
In fan, since the contiguous zone of the leaf top edge on pressure face is equipped with the multiple pits being spaced apart, help to destroy leaf top edge
Contiguous zone on boundary layer, reduce flow resistance, thus avoid the accumulation in boundary layer and cause airflow path block show
As.At the same time, multiple pits are also possible that the blade tip turbo-charger set on the contiguous zone of leaf top edge, and avoid further convolution
Grow, and then the noise reduction effect for eliminating low frequency noise can be played.In addition, multiple pits are arranged on the pressure face of blade, also
The surface area for facilitating increase blade, improves the acting area of blade, finally improves the cooling air quantity of fan.
Other features and advantages of the utility model will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to be used to provide a further understanding of the present invention, and constitute part of specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram according to the fan of preferred embodiments of the present invention；
Fig. 2 is the part-structure figure of Fig. 1, illustrates and is provided with multi-row pit list on the contiguous zone of the leaf top edge of blade
Member；
Fig. 3 is the explosive view of fan component；With
Fig. 4 is to illustrate microwave oven internal master according to the perspective view of the micro-wave oven of preferred embodiments of the present invention
Want structure composition.
Description of symbols
1 magnetron, 2 fan component
3 frequency converter, 4 high-voltage diode
5 back plate, 6 microwave oven heating cavity body
7 bottom plate, 20 fan
21 wheel hub, 22 blade
23 pit, 24 collecting cover
25 bracket, 26 motor
27 pressure face, 28 suction surface
221 blade trailing edge, 222 blade inlet edge
223 blade roots are along 224 leaf top edges
211 outer ring of radius of r blade
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is usually
Be for direction shown in the drawings either for it is vertical, vertically or on gravity direction for each component mutual alignment
Relationship description word.
The utility model provides a kind of novel fan, and as depicted in figs. 1 and 2, which includes wheel hub 21 and edge
Multiple blades 22 on the circumferentially-spaced outer ring 211 for being arranged in wheel hub 21, on the pressure face 27 of blade 22, the leaf top of blade 22
Contiguous zone along 224 is equipped with the multiple pits 23 being spaced apart.
Compared to the existing fan with smooth blades, in the fan of the utility model, due on pressure face 27
The contiguous zone of leaf top edge 224 be equipped with multiple pits 23 for being spaced apart, facilitate on the contiguous zone for destroying leaf top edge 224
Boundary layer, reduce flow resistance, thus the phenomenon that avoiding the accumulation in boundary layer and airflow path caused to block.At the same time,
Multiple pits 23 are also possible that the blade tip turbo-charger set on the contiguous zone of leaf top edge 224, and further convolution is avoided to grow, into
And the noise reduction effect for eliminating low frequency noise can be played.In addition, multiple pits 23 are arranged on the pressure face 27 of blade 22, also
The surface area for helping increase blade 22, improves the acting area of blade 22, finally improves the cooling air quantity of fan 20.
As shown in Fig. 2, pressure face 27 is provided with the multi-row pit unit of the radial direction distribution along blade 22, every row's pit
Unit includes the multiple pits 23 arranged along the extending direction uniform intervals of leaf top edge 224.Wherein, evenly arranged multiple rows of recessed
Hole unit facilitates air-flow and smoothly flows in airflow channel, helps to promote noise reduction effect.
Preferably, the pit unit of 2~5 rows can be equipped on pressure face 27, and the pit unit of 2~5 row is equably
It is distributed on the contiguous zone of leaf top edge 224.
Further, in two rows of pit units adjacent in the radial direction of blade 22 along the extending direction of leaf top edge 224
Arrangement interlaced with each other, so that position is staggered each pit 23 in the pit unit of adjacent two rows each other.
Wherein, in the fan of the utility model 20, contiguous zone, that is, region Ye Ding of the leaf top edge 224 of blade 22, point
The contiguous zone of cloth pit 23 is located at 80%~90% high region of leaf.The leaf height of blade 22 is referred in the radial direction along blade 22
On direction (direction shown in the radius r of blade referring to fig. 2) from blade root along 223 to leaf top edge 224 height.
In the preferred embodiment of the fan 20 of the utility model, being preferably shaped to for pit 23 is hemispherical.Therefore, phase
For smooth blade 22, the blade 22 with pit 23, surface area is bigger, and the air quantity for inhaling volume is also bigger.Certainly, recessed
The shape in hole 23 is not limited to this, and can also be cone or triangular pyramidal etc..
Further, the diameter of hemispherical pit 23 is preferably 0.2mm~0.5mm.
Generally, in the fan of the utility model 20, as shown in Figure 1, the outer ring 211 of wheel hub 21 is equipped with circumferentially etc.
4~8 blades 22 being spaced apart.
At the same time, the fan 20 of the utility model is usually aerofoil fan.
In addition, the utility model additionally provides a kind of micro-wave oven, as shown in figure 4, the micro-wave oven includes magnetron 1, frequency conversion
Device 3 and above-mentioned fan 20, fan 20 are arranged towards magnetron 1 and frequency converter 3.Therefore, the micro-wave oven of the utility model
Include all advantages of said fans 20, no longer repeats one by one.
In general, micro-wave oven further includes bottom plate 7, back plate 5, microwave oven heating cavity body 6, high-voltage diode 4 and fan component 2
(including fan 20).As shown in figure 3, fan component 2 includes bracket 25, collecting cover 24, motor 26 and fan 20.Bracket 25 is logical
It crosses fastener to be fixed in back plate 5, motor 26 is fixed on the bracket 25, and the shaft of motor 26 passes through in the wheel hub 21 of fan 20
Shaft mounting portion, the rear end of fan 20 is equipped with the collecting cover 24 drained towards magnetron 1.
Generally, frequency converter 3 is used to power to magnetron 1, and magnetron 1 generates microwave and adds to the food in cavity 6
Heat, magnetron 1 and frequency converter 3 are main heater element, and fan component 2 carries out wind-cooling heat dissipating to magnetron 1 and frequency converter 3.
Wherein, cavity 6 and frequency converter 3 are fixed on bottom plate 7, and magnetron 1 is fixed on the periphery wall of cavity 6.
When experiment, to the fan 20 with the utility model such as Fig. 1, (i.e. remodeling fan, blade 22 add pit respectively
23) micro-wave oven and the existing micro-wave oven with conventional Ian (smooth blades) carries out temperature rise harmony power test, through multiple
Experimental study shows that in the fan 20 of the micro-wave oven of the utility model, the noise of fan 20 has been down to 54.9dB from 56.5dB,
And the comparing result for measuring the temperature rise of each component in micro-wave oven is as shown in table 1.
1 main heat sink electricity piece temperature rise test result of table
To sum up, the aeroperformance that can be seen that the fan 20 of the utility model from the result of above-mentioned test data obtains
Certain improvement so that the exothermic temperature of each main fever electricity piece in micro-wave oven is all improved, and has preferable
Noise reduction effect.
Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail in conjunction with attached drawing above
Detail in above embodiment can be to the skill of the utility model in the range of the technology design of the utility model
Art scheme carries out a variety of simple variants, these simple variants belong to the protection scope of the utility model.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the utility model is to each
No further explanation will be given for the possible combination of kind.
In addition, any combination can also be carried out between a variety of different embodiments of the utility model, as long as it is not disobeyed
The thought for carrying on the back the utility model, equally should be considered as content disclosed in the utility model.
Claims (10)
1. a kind of fan, including multiple on wheel hub (21) and the circumferentially spaced outer ring (211) for being arranged in the wheel hub (21)
Blade (22), which is characterized in that on the pressure face (27) of the blade (22), the leaf top edge (224) of the blade (22)
Contiguous zone is equipped with the multiple pits (23) being spaced apart.
2. fan according to claim 1, which is characterized in that the pressure face (27) is provided with along the blade (22)
The multi-row pit unit of radial direction distribution, pit unit described in every row include the extending direction along the leaf top edge (224)
Multiple pits (23) of uniform intervals arrangement.
3. fan according to claim 2, which is characterized in that the pressure face (27) is equipped with the pit of 2~5 rows
Unit.
4. fan according to claim 3, which is characterized in that in the two rows adjacent in the radial direction of the blade (22)
The pit unit along the leaf top edge (224) extending direction arrangement interlaced with each other so that the pit list of adjacent two rows
Each pit (23) in member is staggered position each other.
5. fan according to claim 2, which is characterized in that the contiguous zone for being distributed the pit (23) is located at
The high region of 80%~90% leaf.
6. fan described according to claim 1~any one of 5, which is characterized in that the shape of the pit (23) is half
It is spherical.
7. fan according to claim 6, which is characterized in that the diameter of the hemispherical pit (23) be 0.2mm~
0.5mm。
8. fan according to claim 1, which is characterized in that the outer ring (211) of the wheel hub (21) is equipped with circumferentially
4~8 to be spacedly distributed the blade (22).
9. fan according to claim 1, which is characterized in that the fan (20) is aerofoil fan.
10. a kind of micro-wave oven, which is characterized in that the micro-wave oven includes magnetron (1), frequency converter (3) and wanted according to right
Fan described in asking any one of 1~9 (20), the fan (20) are arranged towards the magnetron (1) and frequency converter (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821321746.2U CN208831287U (en) | 2018-08-15 | 2018-08-15 | Fan and micro-wave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821321746.2U CN208831287U (en) | 2018-08-15 | 2018-08-15 | Fan and micro-wave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208831287U true CN208831287U (en) | 2019-05-07 |
Family
ID=66309421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821321746.2U Active CN208831287U (en) | 2018-08-15 | 2018-08-15 | Fan and micro-wave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208831287U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160934A (en) * | 2020-09-17 | 2021-01-01 | 江苏大学 | Coupling bionic centrifugal pump blade |
| CN114046268A (en) * | 2021-11-19 | 2022-02-15 | 杭州贝丰科技有限公司 | Fan blade suitable for motor frame front axial flow fan |
| CN114876828A (en) * | 2021-02-05 | 2022-08-09 | 全亿大科技（佛山）有限公司 | Fan with cooling device |
-
2018
- 2018-08-15 CN CN201821321746.2U patent/CN208831287U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160934A (en) * | 2020-09-17 | 2021-01-01 | 江苏大学 | Coupling bionic centrifugal pump blade |
| CN114876828A (en) * | 2021-02-05 | 2022-08-09 | 全亿大科技（佛山）有限公司 | Fan with cooling device |
| CN114046268A (en) * | 2021-11-19 | 2022-02-15 | 杭州贝丰科技有限公司 | Fan blade suitable for motor frame front axial flow fan |
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| GR01 | Patent grant |