CN207961059U - Fan and micro-wave oven - Google Patents
Fan and micro-wave oven Download PDFInfo
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- CN207961059U CN207961059U CN201721928707.4U CN201721928707U CN207961059U CN 207961059 U CN207961059 U CN 207961059U CN 201721928707 U CN201721928707 U CN 201721928707U CN 207961059 U CN207961059 U CN 207961059U
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Abstract
The utility model discloses a kind of fan and micro-wave ovens, the fan includes multiple blades (22) of circumferentially spaced arrangement, the blade (22) is that center of gravity product changes line (221) along the circumferential prone forward curved vane in direction of rotation (ω) of the fan (20), and it includes straightway (OA) radially outward and the circumferentially prone arc section (AF) of radial outer end from the straightway (OA) that the center of gravity, which accumulates the line (221) that changes,.In the fan of the utility model, the blade of antecurvature formula is used, to change the attack time of different leaf eminence incomings and blade inlet edge, so as to improve air-flow covibration.On the other hand, forward curved vane can also effectively inhibit tail covibration, achieve the purpose that noise reduction.In addition, forward curved vane helps to improve the Radial Flow at leaf top, reduce the aerodynamic loss of the top angular region of blade, to improve the working efficiency of fan.
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
Microwave current stove has been widely used in as the apparatus of heating food in people’s lives.Microwave oven internal master
It to be radiated to the components such as transformer or frequency converter and magnetron using axial fan assembly.Axial fan assembly includes mainly
Flabellum, collecting cover, blower tray and motor.It is positive correlation in aerofoil fan operational process, between flow and noise.Work as wind
It fans rotating speed to increase, flow increases, and noise level can also be promoted accordingly, and the high rotating speed of motor exacerbates the damage of motor
Consumption, increases cost, while also resulting in reliability, safety issue.With the significantly promotion of people's living standard, fan
Noise problem increasingly attract attention, high air quantity, low noise are the development trends of fan product.
In general, in cooling fan, the curve that the center of gravity of the blade profile of different leaf relative superiority or inferiority connects is known as blade
Center of gravity product change line.Repeatedly line is mostly straight line to the center of gravity product of existing fan, as shown in Figure 1 and Figure 4.When repeatedly line is straight to center of gravity product
When line, the microvariations incoming of different leaf eminences almost impacts the leading edge of blade simultaneously, forms air-flow covibration, causes in blade
Leading edge generates larger pressure fluctuation, becomes the first noise source；On the other hand, leaf table turbulent boundary layer and blade trailing edge are mutually dry
It relates to, causes the tail of different leaf eminences while generating period falls off, in evolution downstream, impact downstream solid wall
Face also will produce air-flow covibration, form the second noise source.In addition, in terms of the aeroperformance of fan, due to existing leaf
Radially barometric gradient is larger for piece, and boundary-layer cumulative thickness increases near leaf top, clogging impeller flow channel, and flowing is caused to damage
It loses and increases, poor to the acting ability of fan, efficiency is low.
Utility model content
The purpose of this 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, includes multiple blades of circumferentially spaced arrangement,
The blade is the circumferentially prone forward curved vane in direction of rotation that center of gravity accumulates repeatedly line along the fan, and the center of gravity product changes
Line includes straightway radially outward and the circumferentially prone arc section of radial outer end from the straightway.
Preferably, the center of gravity product repeatedly forms continuous and derivable transition between the straightway and the arc section of line.
Preferably, the ratio between the radical length of the straightway and the leaf height of the blade are 15%~60%.
Preferably, the ratio between the radical length of the straightway and the leaf height of the blade are 35%~45%.
Preferably, before the fan-shaped angle between the distal point of the arc section and the straightway is the forward curved vane
Bending angle, the antecurvature angle are not more than 20 °.
Preferably, the antecurvature angle is 4 °~12 °.
Preferably, the fan is aerofoil fan.
Preferably, the fan includes wheel hub, and it is described that the outer ring of the wheel hub is equipped with 4-8 to be circumferentially spacedly distributed
Blade.
In addition, the utility model additionally provides a kind of micro-wave oven, which is characterized in that the micro-wave oven is equipped with described above
Fan.
Preferably, the micro-wave oven includes magnetron, and the fan is mounted in the back plate of the micro-wave oven, the fan
Rear end be equipped with towards the magnetic control Tube Drain collecting cover.
In the fan of the utility model, the blade of antecurvature formula is used, before changing different leaf eminence incomings and blade
The attack time of edge, so as to improve air-flow covibration.On the other hand, it is existing can also to effectively inhibit tail resonance for forward curved vane
As achieving the purpose that noise reduction.In addition, forward curved vane helps to improve the Radial Flow at leaf top, reduce the top angular region of blade
Aerodynamic loss, to improve the working efficiency of fan.
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, and the center of gravity for illustrating fan accumulates the line that changes；
Fig. 2 is the vertical view according to a kind of fan with forward curved vane of the utility model；
Fig. 3 is the enlarged drawing that the center of gravity of forward curved vane in Fig. 2 accumulates the line that changes, and illustrates the parameters that the center of gravity accumulates the line that changes；
Fig. 4 is the left view of existing fan, and the center of gravity for illustrating fan accumulates the line that changes；
Fig. 5 is the left view according to a kind of fan with sweepforward blade of the utility model；
Fig. 6 is the enlarged drawing that the center of gravity of sweepforward blade in Fig. 5 accumulates the line that changes, and illustrates the parameters that the center of gravity accumulates the line that changes；
Fig. 7 is the internal structure schematic diagram according to the micro-wave oven of specific embodiment of the present utility model；
Fig. 8 is the explosive view of fan component, wherein the blade of fan is forward curved vane；
Fig. 9 is the explosive view of fan component, wherein the blade of fan is sweepforward blade.
Reference sign
1 cavity, 2 fan component
3 bottom plate, 4 transformer
5 power cord bifurcated, 6 back plate
7 magnetrons
20 fan, 21 wheel hub
22 blade, 24 collecting cover
25 holder, 26 motor
211 outer ring, 221 center of gravity accumulates the line that changes
OA straightway AF arc sections
The distal point of the starting point F arc sections of O straightways
Angle that α sweepforward angle betas are antecurvature
The direction of rotation of u direction of flow ω fans
The radical length of H-r straightways
The leaf of R-r blades is high
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.
The utility model provides a kind of novel fan, as shown in Fig. 2, the fan 20 includes circumferentially spaced arrangement
Multiple blades 22, blade 22 are the circumferentially prone forward curved vanes of direction of rotation ω that center of gravity accumulates repeatedly line 221 along fan 20,
Repeatedly line 221 includes straightway OA radially outward and the circumferentially prone circle of radial outer end from straightway OA to center of gravity product
Segmental arc AF.
As it can be seen that in the fan 20 of the utility model as shown in Figure 2, the blade 22 of antecurvature formula is used, to change not
With leaf eminence incoming and 22 up-front attack time of blade, so as to improve air-flow covibration.On the other hand, forward curved vane also may be used
To effectively inhibit tail covibration, achieve the purpose that noise reduction.In addition, forward curved vane helps to improve the radial flow at leaf top
It is dynamic, reduce the aerodynamic loss of the top angular region of blade 22, to improve the working efficiency of fan 20.
As shown in Fig. 2, center of gravity product changes continuous and derivable transition is formed between the straightway OA and arc section AF of line 221.I.e. should
Center of gravity product changes line 221 for a smooth line segment, and without intermediate break.
Wherein, repeatedly the ratio between the radical length H-r of 221 straightway OA of line and the high R-r of leaf of blade 22 can be 15% to center of gravity product
~60%.
Further, the ratio between the radical length H-r of straightway OA and the high R-r of leaf of blade 22 preferably 35%~45%.
As shown in Fig. 2, in the fan 20 of the utility model, by controlling the antecurvature angle beta of blade 22, change different leaves
The attack time of eminence incoming and blade inlet edge, so as to improve air-flow covibration.In this regard, the distal point F of arc section AF with it is straight
Fan-shaped angle between line segment OA is the antecurvature angle beta of forward curved vane, and antecurvature angle beta is not more than 20 °.
Further, antecurvature angle beta is preferably 4 °~12 °.
In addition, the utility model additionally provides another novel fan, as shown in figure 5, the fan 20 includes wheel hub 21
With circumferentially spaced multiple blades 22 on the outer ring 211 of wheel hub 21, blade 22 is in face of direction of flow u along wheel hub 21
Axial bending sweepforward blade, the center of gravity product of the sweepforward blade line 221 that changes includes straightway OA radially outward and from straight
The radial outer end of line segment OA is bent the arc section AF of extension in an axial direction.
As it can be seen that in the fan 20 of the utility model as shown in Figure 5, the blade 22 of forward swept is used, the sweepforward leaf
The design concept of piece is mainly to improve the pressure distribution on 22 surface of blade, to effectively inhibit tip vortex and the blade root at top
Up-front horse shoe vortex reduces the vortex range in channel, improves the mechanical efficiency of the fan 20.On the other hand, sweepforward blade
Radial pressure distribution causes the boundary layer thickness in the high region of most of leaf to reduce, and has efficiently controlled the radial miscibility of flowing, has had
Conducive to the noise of reduction fan 20.
Wherein, as shown in figure 5, between the line and straightway OA of the starting point O of the distal point F and straightway OA of arc section AF
Angle be sweepforward blade sweepforward angle [alpha], sweepforward angle [alpha] be 8 °~40 °.
Further, sweepforward angle [alpha] is preferably 15 °~25 °.
In the center of gravity of such as Fig. 5 accumulates repeatedly line 221, the ratio between the radical length H-r of straightway OA and the high R-r of leaf of blade 22 are
15%~60%.
Preferably, the ratio between the radical length H-r of straightway OA and the high R-r of leaf of blade 22 are 35%~45%.
Similarly, the center of gravity product of the fan 20 of the utility model changes line 221 as a smooth line segment, wherein straightway
OA is the tangent line of arc section AF.
Meanwhile the fan 20 of the utility model is aerofoil fan.
Usually, fan 20 includes wheel hub 21, and the outer ring 211 of wheel hub 21 can be equipped with 4~8 to be circumferentially spacedly distributed
Blade 22.
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
20.Therefore the micro-wave oven also contains all advantages of the fan 20 of the utility model, no longer repeats one by one.
In general, micro-wave oven includes bottom plate 3, back plate 6, magnetron 7, transformer 4 or frequency converter, microwave oven heating cavity body 1, electricity
Source line bifurcated 5, high-voltage diode and fan component 2 (including fan 20).Usual transformer 4 or frequency converter are used for magnetron 7
Power supply, magnetron 7 generate microwave and are heated to the food in cavity 1, and fan component 2 is to magnetron 7 and transformer 4 or frequency conversion
Device radiates.Wherein, cavity 1 and transformer 4 or frequency converter are fixed on bottom plate 3, and magnetron 7 is fixed on cavity 1.
Wherein, as shown in Figure 7 to 9, micro-wave oven includes magnetron 7, and fan 20 is mounted in the back plate 6 of micro-wave oven, wind
The rear end of fan 20 is equipped with the collecting cover 24 drained towards magnetron 7.As shown in Figure 8 and Figure 9, fan component 2 includes fan 20, collection
Stream cover 24, holder 25 and motor 26, holder 25 are fixed by screws in back plate 6, and motor 26 is fixed on the holder 25, motor
26 shaft passes through the shaft mounting portion of fan 20.
Experiment one：Use the utility model as Fig. 2 fan 20 (i.e. blade 22 is forward curved vane), relative to it is existing such as
The conventional Ian (center of gravity product changes line 221 as straight line) of Fig. 1 carries out temperature and rises experiment respectively, measures it to each component in micro-wave oven
The results are shown in Table 1 for heat dissipation effect.
1 main heat sink electricity piece temperature of table rises test result
It is obtained according to the data analysis of experiment one：As can be seen from the table, compared to existing conventional Ian, this practicality is housed
Essential electrical part temperature in the micro-wave oven (referring to Fig. 7) of the novel fan 20 with forward curved vane is all declined.And
After the fan 20 of the utility model, micro-wave oven flow noise is down to 54.5dB from 56.7dB.Therefore, new using this practicality
The heat dissipation of the fan 20 of type and noise reduction are further promoted, with obvious effects.
Experiment two：Use the utility model as Fig. 5 fan 20 (i.e. blade 22 is sweepforward blade), relative to it is existing such as
The conventional Ian (center of gravity product changes line 221 as straight line) of Fig. 4 carries out temperature and rises experiment respectively, measures it in micro-wave oven (referring to Fig. 7)
The heat dissipation effect of each component the results are shown in Table 2.
2 main heat sink electricity piece temperature of table rises test result
It is obtained according to the data analysis of experiment two：As can be seen from the table, compared to existing conventional Ian, this practicality is housed
Essential electrical part temperature in the micro-wave oven of the novel fan 20 with sweepforward blade is all declined.And use this practicality
After novel fan 20, micro-wave oven flow noise is down to 55.5dB from 56.7dB.Therefore, using the fan of the utility model 20
Heat dissipation and noise reduction further promoted, it is with obvious effects.
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 includes multiple blades (22) of circumferentially spaced arrangement, which is characterized in that the blade (22) is center of gravity
Direction of rotation (ω) circumferential prone forward curved vane of the line (221) along the fan (20) is accumulated repeatedly, the center of gravity product changes
Line (221) includes straightway (OA) radially outward and circumferentially prone from the radial outer end of the straightway (OA)
Arc section (AF).
2. fan according to claim 1, which is characterized in that the center of gravity accumulates the straightway (OA) for the line (221) that changes
Continuous and derivable transition is formed between the arc section (AF).
3. fan according to claim 1, which is characterized in that the radical length (H-r) of the straightway (OA) with it is described
The ratio between leaf of blade (22) high (R-r) is 15%~60%.
4. fan according to claim 1, which is characterized in that the radical length (H-r) of the straightway (OA) with it is described
The ratio between leaf of blade (22) high (R-r) is 35%~45%.
5. fan according to claim 1, which is characterized in that the distal point (F) of the arc section (AF) and the straight line
Fan-shaped angle between section (OA) is the antecurvature angle (β) of the forward curved vane, and the antecurvature angle (β) is not more than 20 °.
6. fan according to claim 5, which is characterized in that the antecurvature angle (β) is 4 °~12 °.
7. the fan according to any one of claim 1~6, which is characterized in that the fan (20) is aerofoil fan.
8. fan according to claim 7, which is characterized in that the fan (20) includes wheel hub (21), the wheel hub
(21) outer ring (211) is equipped with 4~8 blades (22) being circumferentially spacedly distributed.
9. a kind of micro-wave oven, which is characterized in that the micro-wave oven is equipped with the wind according to any one of claim 1~8
It fans (20).
10. micro-wave oven according to claim 9, which is characterized in that the micro-wave oven includes magnetron (7), the fan
(20) it is mounted in the back plate (6) of the micro-wave oven, the rear end of the fan (20) is equipped with to be drained towards the magnetron (7)
Collecting cover (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721928707.4U CN207961059U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721928707.4U CN207961059U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
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| Publication Number | Publication Date |
|---|---|
| CN207961059U true CN207961059U (en) | 2018-10-12 |
Family
ID=63731974
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721928707.4U Active CN207961059U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102243A (en) * | 2019-12-20 | 2020-05-05 | 秦皇岛首创思泰意达环保科技有限公司 | High-efficiency low-noise axial flow fan rotor and application thereof in remote mist sprayer |
| CN112283160A (en) * | 2020-12-24 | 2021-01-29 | 中国航发上海商用航空发动机制造有限责任公司 | Compressor rotor blade and design method thereof |
| CN112464413A (en) * | 2020-12-11 | 2021-03-09 | 华中科技大学 | Circumferential bending type axial flow fan and design method thereof |
| CN113494748A (en) * | 2020-03-20 | 2021-10-12 | 广东美的环境电器制造有限公司 | Humidifying device |
-
2017
- 2017-12-30 CN CN201721928707.4U patent/CN207961059U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102243A (en) * | 2019-12-20 | 2020-05-05 | 秦皇岛首创思泰意达环保科技有限公司 | High-efficiency low-noise axial flow fan rotor and application thereof in remote mist sprayer |
| CN113494748A (en) * | 2020-03-20 | 2021-10-12 | 广东美的环境电器制造有限公司 | Humidifying device |
| CN112464413A (en) * | 2020-12-11 | 2021-03-09 | 华中科技大学 | Circumferential bending type axial flow fan and design method thereof |
| CN112283160A (en) * | 2020-12-24 | 2021-01-29 | 中国航发上海商用航空发动机制造有限责任公司 | Compressor rotor blade and design method thereof |
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