CN207961053U - Fan and micro-wave oven - Google Patents
Fan and micro-wave oven Download PDFInfo
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- CN207961053U CN207961053U CN201721929375.1U CN201721929375U CN207961053U CN 207961053 U CN207961053 U CN 207961053U CN 201721929375 U CN201721929375 U CN 201721929375U CN 207961053 U CN207961053 U CN 207961053U
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Abstract
The utility model discloses a kind of fan and micro-wave ovens, the fan (2) includes wheel hub (21) and along the circumferentially spaced multiple blades (22) in the outer ring of the wheel hub, the pressure face (220) of the blade (22) is equipped with boss (23), which extends to the leaf top edge (221) of the blade (22).In the fan of the utility model, the boss of a prolongation structure as blade is additionally arranged in the leaf top edge of the pressure face of blade, so that fan is during high speed rotation, the boss can prevent the air-flow in the regions Ye Ding from being leaked from the pressure of blade towards suction surface side, effectively inhibit and prevent the flow separation phenomenon of pressure face and the generation of blade tip leakage vortex stream, to improve the mechanical efficiency of fan so that air quantity bigger, the noise content smaller of fan improve the satisfaction of user.
Description
Technical field
The utility model is related to household appliance technical fields, and in particular, to a kind of fan and micro-wave oven.
Background technology
Currently, micro-wave oven has been widely used in people’s lives as the apparatus of heating food.Microwave is a kind of electromagnetism
Wave, micro-wave oven are made of power supply, magnetron, the part such as control circuit and cooking cavity.Microwave oven internal mainly utilizes axis stream wind
Fan component radiates to the components such as transformer or frequency converter and magnetron.Axial fan assembly mainly include flabellum, collecting cover,
Blower tray and motor.It is positive correlation in aerofoil fan operational process, between flow and noise.When rotation speed of the fan increase,
Flow increases, and noise level can also be promoted accordingly, and the high rotating speed of motor exacerbates the loss of motor, increases into
This, while also resulting in reliability, safety issue.With the significantly promotion of people's living standard, the noise problem of fan
It increasingly attracts attention, high air quantity, low noise are the development trends of fan product.
Conventional fan during the work time, due between the leaf top edge and collecting cover of blade there are certain gap,
It can be acted on by pressure differential in the gap, some can be flowed to by leaf top on suction surface for the pressure face air-flow of blade,
Cause the flow separation of leaf pressure on top surface side and the leakage jet stream of leaf top suction side.This leakage vortex flow direction and leaf chord length
Direction is substantially vertical, is formed to mainstream and blocks and blend in turn, causes strong mixing loss, this is also that fan is caused to lose
Steady key factor.On the other hand, blade tip leakage vortex is also one of main source of fan noise.
Utility model content
The purpose of this utility model is to provide the fan that a kind of air quantity is big, noise is small.
To achieve the goals above, the utility model provides a kind of fan, which includes wheel hub and along the wheel hub
The pressure face of the circumferentially spaced multiple blades in outer ring, the blade is equipped with boss, which extends to the leaf of the blade
Top edge.
Preferably, the boss is extended radially inwardly from the leaf top edge.
Preferably, the boss is arranged close to the blade trailing edge of the blade.
Preferably, the spacing between the boss and the blade trailing edge is not more than the width of the boss.
Preferably, on the blade profile section of the lug boss position, the cross section contour of the boss is the arc-shaped of protuberance.
Preferably, the connection that smoothly transits is formed between the cross section contour of the boss and pressure face molded line.
Preferably, the boss is semicylinder, and the section of the boss is semicircle.
Preferably, on the pressure face, the radical length of the boss account for the blade leaf it is high 1%~25%.
Preferably, the fan further includes holder and fixed motor on the bracket, and the output shaft of the motor is worn
The even shaft mounting portion of the wheel hub, the holder includes the collecting cover being located on the outside of the blade radial.
In addition, the utility model additionally provides a kind of micro-wave oven, the micro-wave oven includes fan described above.
Through the above technical solutions, due in the fan of the utility model, added in the leaf top edge of the pressure face of blade
The boss of one prolongation structure as blade, so that fan, during high speed rotation, which can prevent leaf
The air-flow for pushing up region is leaked from the pressure of blade towards suction surface side, effectively inhibits and prevent the flow separation of pressure face
The generation of phenomenon and blade tip leakage vortex stream, to improve the mechanical efficiency of fan so that the air quantity bigger of fan, noise content are more
It is small, improve the satisfaction of user.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide a further understanding of the present invention, an and part for constitution instruction, and following
Specific implementation mode 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 vertical view of existing fan, illustrates a kind of fan with smooth blades；
Fig. 2 is not show the knots such as motor and holder according to the stereogram of the fan of specific embodiment of the present utility model
Structure；
Fig. 3 is the vertical view of Fig. 2, illustrates the multiple parameters of the fan；
Fig. 4 is the blade profile sectional view of the blade of existing fan；
Fig. 5 is to be cut according to the blade profile on the blade profile section of lug boss position of the fan of specific embodiment of the present utility model
Face figure；
Fig. 6 is the explosive view according to the fan of specific embodiment of the present utility model；
Fig. 7 is the internal structure schematic diagram according to the micro-wave oven of specific embodiment of the present utility model.
Reference sign
1 cavity, 2 fan
3 bottom plate, 4 transformer
5 power cord bifurcated, 6 back plate
7 magnetrons
21 wheel hub, 22 blade
23 boss, 24 collecting cover
25 holder, 26 motor
221 leaf top edge, 222 blade trailing edge
The cross section contour of 220 pressure face, 231 boss
The leaf of the radical length H blades of h boss is high
Spacing between L1 boss and blade trailing edge
The width of L2 boss
Specific implementation mode
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 implementation mode 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.
For the existing fan (shown in Figure 1) with smooth blades, between the leaf top of blade 22 and current collector
Gap location be easy to form leakage vortex and lead to the problem that air quantity of fan is small, noise is big, for this purpose, the utility model provides one kind
Novel fan 2.As shown in Fig. 2, the fan 2 is including wheel hub 21 and along the circumferentially spaced multiple blades in the outer ring of wheel hub
22, the pressure face 220 of blade 22 is equipped with boss 23, which extends to the leaf top edge 221 of blade 22.
As it can be seen that due in the fan 20 of the utility model, it is additionally arranged in the leaf top edge 221 of the pressure face 220 of blade 22
The boss 23 of one prolongation structure as blade 22, so that fan 2 is during high speed rotation, which can be with
It prevents the air-flow in the regions Ye Ding from being leaked from the pressure face 220 of blade 22 to 223 side of suction surface, effectively inhibits and prevent
The flow separation phenomenon of pressure face 220 and the generation of blade tip leakage vortex stream, to improve the mechanical efficiency of fan 2 so that wind
Air quantity bigger, the noise content smaller of fan 2, improve the satisfaction of user.
As shown in figure 3, boss 23 is generally extended radially inwardly from leaf top edge 221, so as to avoid the stream in the regions Ye Ding
Dynamic segregation phenomenon.
Since the leakage vortex on the leaf top of fan 2 occurs mainly in 220 side of pressure face and close to the position of blade trailing edge 222
It sets, therefore, in the fan 2 of the utility model, boss 23 is positioned close to the blade trailing edge 222 of blade 22.It needs to illustrate
It is that the blade trailing edge 222 of close blade 22 herein is for the blade inlet edge of blade 22, i.e., at least before blade
The part of blade trailing edge 222 is biased between edge and blade trailing edge 222.
Wherein, the spacing L1 between boss 23 and blade trailing edge 222 is preferably not more than the width L2 of boss 23, so that
Boss 23 is arranged close to blade trailing edge 222.Wherein, L1 and L2 is for the circumferential direction of wheel hub 21.
In the fan 2 of the utility model, the shape of boss 23 can there are many, such as box-shaped protrusion or triangle platform convex
Play shape structure etc..Preferably, on the blade profile section equipped with 23 position of boss, the cross section contour 231 of boss 23 is protuberance
It is arc-shaped.It should be noted that blade profile section is the cross section due to the blade 22 of the outer concentric circular with wheel hub 21 intercepted,
Therefore, the blade profile section of existing smooth blades as shown in Figure 4 is compared, the utility model uses as shown in Figure 5 smooth
Arc-shaped boss 23, not only so that the heat dissipation of fan 2 and more preferable while smooth 23 structure of boss of noise reduction have it is fine
Ground reduces the characteristics of windage.
Further, the connection that smoothly transits is formed between the cross section contour of boss 23 and pressure face molded line so that fan 2
22 good appearance of blade, and the air quantity bigger of fan 2.
Preferably, boss 23 is semicylinder, and the section of boss 23 is semicircle, simple shape, manufacture easy to process.
As shown in figure 3, on pressure face 220, the radical length H of boss 23 accounts for the preferred of the ratio of the high h of leaf of blade 22
Ranging from 1%~25% (ratio includes 1% and 25%).
As shown in fig. 6, the motor 26 that fan 2 also typically includes holder 25 and is fixed on holder 25, the output of motor 26
Axis wears the shaft mounting portion of even wheel hub 21, and holder 25 includes the collecting cover 24 for being located at 22 radial outside of blade.Due to collecting cover
24 generally radially compartment of terrain be arranged in the outside of blade 22, therefore the shape between the leaf top edge 221 and collecting cover 24 of blade 22
At there is certain installation gap, and it is easy to form leakage vortex between the leaf top of the fan of existing smooth blades and collecting cover 24,
And lead to the problem that fan mechanical efficiency is not high, noise is larger occur, after the fan 2 of the utility model, can effectively it solve
Certainly this problem.
In addition, the utility model additionally provides a kind of micro-wave oven, as shown in fig. 7, micro-wave oven is equipped with fan described above
2.Therefore the micro-wave oven also contains all advantages of the fan 2 of the utility model, no longer repeats one by one.
In general, as shown in fig. 7, micro-wave oven includes bottom plate 3, back plate 6, magnetron 7, transformer 4 or frequency converter, micro-wave oven
Heating cavity 1, power cord bifurcated 5, high-voltage diode and fan component 2 (including fan 20).Usual transformer 4 or frequency converter are used
It powers in magnetron 7, magnetron 7 generates microwave and heated to the food in cavity 1, and fan component 2 is to magnetron 7 and becomes
Depressor 4 or frequency converter radiate.Wherein, cavity 1 and transformer 4 or frequency converter are fixed on bottom plate 3, and magnetron 7 is fixed on
On cavity 1.
Specifically, micro-wave oven includes magnetron 7, and fan 2 is mounted in the back plate 6 of micro-wave oven, and the rear end of fan 2 is equipped with
The collecting cover 24 drained towards magnetron 7.As shown in Figure 6 and Figure 7, fan 2 includes blade 22, wheel hub 21, collecting cover 24, holder
25 and motor 26 etc., holder 25 are fixed by screws in back plate 6, and motor 26 is fixed on the holder 25, the shaft of motor 26
Across the shaft mounting portion of fan 2.
When experiment, using the utility model such as fan 2 (fan of retrofiting, blade 22 add boss 23) of Fig. 2 and existing
Conventional Ian just like Fig. 1 carries out temperature and rises harmony power test respectively, measures pair to the temperature rise test of each component in micro-wave oven
Than the results are shown in Table 1 and the comparing result of noise test data is as shown in table 2.
1 main heat sink electricity piece temperature of table rises test result
Table 2
The aeroperformance that can be seen that the fan 2 of the utility model from the result of the test data of above-mentioned Tables 1 and 2 obtains
Certain improvement is arrived so that the temperature of each main heat sink electricity piece in micro-wave oven is all improved, and under different voltages
All relatively the existing fan with smooth blades is low for acoustic power level.
Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail above in association with attached drawing
Detail in the 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 scope of protection 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 of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
The possible combination of kind no longer separately illustrates.
In addition, arbitrary 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, which is characterized in that the fan (2) includes wheel hub (21) and along the circumferentially-spaced arrangement in the outer ring of the wheel hub
Multiple blades (22), the pressure face (220) of the blade (22) is equipped with boss (23), which extends to the blade
(22) leaf top edge (221).
2. fan according to claim 1, which is characterized in that the boss (23) from the leaf top edge (221) it is radial to
Interior extension.
3. fan according to claim 1, which is characterized in that blade tail of the boss (23) close to the blade (22)
Edge (222) is arranged.
4. fan according to claim 3, which is characterized in that between the boss (23) and the blade trailing edge (222)
Spacing (L1) be not more than the boss (23) width (L2).
5. fan according to claim 1, which is characterized in that described on the blade profile section of the boss (23) position
The cross section contour (231) of boss (23) is the arc-shaped of protuberance.
6. fan according to claim 5, which is characterized in that the cross section contour of the boss (23) and pressure face molded line
Between formed and smoothly transit connection.
7. fan according to claim 5, which is characterized in that the boss (23) is semicylinder, the boss (23)
Section be semicircle.
8. fan according to claim 1, which is characterized in that on the pressure face (220), the diameter of the boss (23)
The 1%~25% of the leaf high (h) of the blade (22) is accounted for length (H).
9. the fan according to any one of claim 1~8, which is characterized in that the fan (2) further includes holder
(25) and the motor (26) that is fixed on the holder (25), the output shaft of the motor (26) wears turning for the even wheel hub (21)
Axis mounting portion, the holder (25) include the collecting cover (24) for being located at the blade (22) radial outside.
10. a kind of micro-wave oven, which is characterized in that the micro-wave oven includes the wind described in any one according to claim 1~9
It fans (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721929375.1U CN207961053U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721929375.1U CN207961053U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207961053U true CN207961053U (en) | 2018-10-12 |
Family
ID=63731594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721929375.1U Active CN207961053U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207961053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219362A (en) * | 2018-11-27 | 2020-06-02 | 中国航发商用航空发动机有限责任公司 | Axial compressor blade, axial compressor and gas turbine |
-
2017
- 2017-12-30 CN CN201721929375.1U patent/CN207961053U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219362A (en) * | 2018-11-27 | 2020-06-02 | 中国航发商用航空发动机有限责任公司 | Axial compressor blade, axial compressor and gas turbine |
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