CN207961061U - Fan and micro-wave oven - Google Patents
Fan and micro-wave oven Download PDFInfo
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- CN207961061U CN207961061U CN201721929365.8U CN201721929365U CN207961061U CN 207961061 U CN207961061 U CN 207961061U CN 201721929365 U CN201721929365 U CN 201721929365U CN 207961061 U CN207961061 U CN 207961061U
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- fan
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- wheel hub
- molded line
- flow path
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Abstract
The utility model discloses a kind of fan and micro-wave ovens, the fan (20) includes wheel hub (21) and the circumferentially spaced multiple blades (22) in outer ring (211) along wheel hub (21), in fan runner between two neighboring blade (22), outer ring (211) surface of wheel hub (21) is formed with the flow path groove (212) formed along fan runner direction and runner fin (213), blade pressure surface (222) of the flow path groove (212) close to fan runner, blade suction surface (221) of the runner fin (213) close to fan runner.The wheel hub of the fan of the utility model is a kind of novel hub of outer peripheral surface deformation, by the wheel hub section in the fan runner between two neighboring blade, flow path groove and runner fin are set, can be effectively reduced wheel hub suction side and on the pressure side between lateral pressure difference, weaken the trend that low energy fluid is accumulated toward the angular region of the suction side of wheel hub, the angular region reduced in hub outside surface blocks, to improve heat dissipation and the noise reduction 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
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.
With micro-wave oven miniaturization, the higher and higher trend of requirement of portable characteristics, magnetron and transformer or frequency converter
Arrangement etc. high-power fever electricity piece is increasingly concentrated, therefore higher and higher to the performance requirement of cooling fan.Wherein,
The rotating speed for improving cooling fan is conducive to improve the heat dissipation air quantity of fan, but when rotation speed of the fan increases, flow increases, noise water
It is flat also to be promoted accordingly, and the high rotating speed of motor exacerbates the loss of motor, increases cost, while also resulting in reliable
The problem of property, safety.With the significantly promotion of people's living standard, the noise problem of fan is increasingly closed
Note, high air quantity, low noise are the development trends of fan product.
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, including wheel hub and along the outer ring of wheel hub week
To spaced apart multiple blades, in the fan runner between the two neighboring blade, the outer peripheral surface shape of the wheel hub
At having the flow path groove formed along fan runner direction and runner fin, the flow path groove is close to the fan runner
Blade pressure surface, blade suction surface of the runner fin close to the fan runner.
Preferably, in the circumferential direction of the outer ring, the flow path groove and the blade pressure face interval, the runner are convex
Rib and the blade suction face interval.
Preferably, on the arbitrary cross section of the wheel hub, the flow path groove molded line on the outer ring contour line of the wheel hub
It is connected with runner fin molded line and forms s shape.
Preferably, the connected flow path groove molded line and runner fin molded line are formed as wave molded line S1, the wave
Molded line S1 is distributed in SIN function.
Preferably, on the setting cross section of the wheel hub, the wave molded line S1 is sat by the pole of pole of hub centre
Marking curvilinear equation is：
Wherein, r1 is the basic radius of circle of the outer peripheral surface of the wheel hub, and θ 1, θ 2 are respectively the wave molded line S1 adjacent
Two blades trailing edge blade root point polar angle.
Preferably, the flow path groove and runner fin flow to molded line S2 as S-shaped along what fan runner direction extended
Smooth curve.
Preferably, the flow path groove and runner fin are the wave molded line S1 on the setting cross section along institute
It states and flows to the stretching of molded line S2 and sweep sample molding structure.
Preferably, using the hub centre under the polar coordinate system of pole, to constitute each line style for flowing to molded line S2
The polar angle θ of homolographic projection point of the point under the polar coordinate system is with each line style point on the central axis of the wheel hub
Accordingly the relational expression of Z values is：
Preferably, the blade suction surface is smooth dimpling face, and the blade pressure surface is smooth micro-concave surface.
In addition, the utility model additionally provides a kind of micro-wave oven, which includes fan described above.
Through the above technical solutions, since the wheel hub of the fan of the utility model is a kind of novel wheel of outer peripheral surface deformation
Flow path groove and runner fin is arranged by the wheel hub section in the fan runner between two neighboring blade in hub, can be effective
Ground reduce wheel hub suction side and on the pressure side between lateral pressure difference, weaken low energy fluid toward the suction side of wheel hub angular region accumulate
Trend, reduce hub outside surface on angular region block, to improve heat dissipation and the noise reduction of fan.Further, since blade
Pressure face is the acting face of fan, and the recessed flow path groove of the outer peripheral surface of wheel hub is positioned close to blade pressure surface one
Side is conducive to the mechanical efficiency for improving fan, increases the heat dissipation air quantity 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 and Fig. 2 is the structural schematic diagram of existing conventional Ian；
Fig. 3 is the front view according to the fan of specific embodiment of the present utility model；
Fig. 4 is the vertical view according to the fan of specific embodiment of the present utility model；
Fig. 5 is the internal structure schematic diagram according to the micro-wave oven of specific embodiment of the present utility model；
Fig. 6 is the explosive view of fan component.
Reference sign
1 cavity, 2 fan component
3 bottom plate, 4 transformer
5 power cord bifurcated, 6 back plate
7 magnetron, 211 outer ring
20 fan, 21 wheel hub
22 blade, 24 collecting cover
25 holder, 26 motor
212 flow path groove, 213 runner fin
221 blade suction surface, 222 blade pressure surface
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.
In existing fan as depicted in figs. 1 and 2, the wheel hub 20 of fan is usually cylindrical bosses, in the suction of blade 22
21 region of root and wheel hub in power face, is easy to happen corner region flow segregation phenomenon.Corner region flow segregation phenomenon is mainly derived from wheel
Circumferential whirlpool, circumferential whirlpool caused by the outer peripheral surface boundary layer of hub 21 will produce Secondary Flow after entering leaf grating bending channel
It is dynamic and developing becomes Passage Vortex, so as to cause the low energy fluid near the outer peripheral surface boundary layer of wheel hub 21 from the pressure face of blade
It is accumulated to suction surface.In addition, the root leading edge post-tensioning that blade 22 is encountered in circumferential whirlpool can form horse shoe vortex, lead to the leaf of suction surface
Boundary layer low energy fluid near root is accumulated toward 21 direction of wheel hub, when the low energy fluid of angular region accumulation can not resist in fan passage
Adverse pressure gradient when, wheel hub corner separation will occur, eventually lead to fan stall, radiating efficiency is relatively low, and noise is larger.
In view of the above-mentioned problems, the utility model provides a kind of novel fan 20, as shown in Fig. 3 and Fig. 4, the fan
20 including wheel hub 21 and along the circumferentially spaced multiple blades 22 in the outer ring of wheel hub 21 211, between two neighboring blade 22
Fan runner in, 211 surface of outer ring of wheel hub 21 is formed with the flow path groove 212 formed along fan runner direction and runner is convex
Rib 213, flow path groove 212 is close to the blade pressure surface 222 of fan runner, blade suction of the runner fin 213 close to fan runner
Power face 221.
As it can be seen that since the wheel hub 21 of the fan 20 of the utility model is a kind of novel hub 21 of 211 surface deformation of outer ring,
By wheel hub section in the fan runner between two neighboring blade 22, flow path groove 212 and runner fin 213 are set, it can be with
Be effectively reduced wheel hub 21 suction side and on the pressure side between lateral pressure difference, weaken low energy fluid toward wheel hub 21 suction side
The trend of angular region accumulation, the angular region reduced on 21 outer surface of wheel hub blocks, to improve heat dissipation and the noise reduction of fan 20.
Further, since blade pressure surface 222 is the acting face of fan 20, and the recessed flow path groove 212 of the outer peripheral surface of wheel hub 21
It is positioned close to 222 side of blade pressure surface, is conducive to the mechanical efficiency for improving fan 20, increases the radiation air of fan 20
Amount.
As shown in figure 3, in the circumferential direction of outer ring 211, flow path groove 212 is spaced with blade pressure surface 222, runner fin
213 are spaced with blade suction surface 221, i.e., flow path groove 212 is arranged with runner fin 213 and the interval of blade 22.
Wherein, flow path groove 212 can be not only connected directly with runner fin 213 on 211 surface of the outer ring of wheel hub 21, but also can
It is arranged with interval.Preferably, on the arbitrary cross section of wheel hub 21, the flow path groove type on 211 contour line of outer ring of wheel hub 21
Line is connected with runner fin molded line and forms s shape.
Further, connected flow path groove molded line and runner fin molded line are formed as wave molded line S1, as shown in figure 4,
Wave molded line S1 is preferably in that SIN function is distributed.
It is distributed as shown in figure 4, wave molded line S1 is in preferably SIN function, one such specific implementation mode is full
Sufficient following the equation：
On the setting cross section of wheel hub 21, wave molded line S1 is using 21 center of wheel hub as the polar curve equation of pole
For：
Wherein, r1 is the basic radius of circle on 211 surface of outer ring of wheel hub 21, and θ 1, θ 2 are respectively wave molded line S1 adjacent
The polar angle of the blade root point of the trailing edge of two blades 22.It is corresponding that wave molded line S1 can be calculated according to above-mentioned formula (1)
The surface radius r of the outer ring 211 of wheel hub 21.
As shown in figure 3, flow path groove 212 and runner fin 213 are S-shaped along the molded line S2 that flows to that fan runner direction extends
Smooth curve.
By carrying out wave molded line S1 to wheel hub 22 and flowing to the matching treatment of molded line S2,21 circumferential direction side of wheel hub can be reduced
Upward pressure gradient, weakens the development of Passage Vortex, to inhibiting the boundary layer separation on follow-up 22 surface of blade and taking off for trailing vortex
It falls and is very helpful, to reduce the flow noise of fan 20.
For the angle of formed product, flow path groove 212 and runner fin 213 are the wave molded line set on cross section
S1 sweeps sample molding structure along the stretching for flowing to molded line S2.
Molded line S2 is flowed to as shown in Figure 3, using 21 center of wheel hub as under the polar coordinate system of pole, composition flows to molded line
The polar angle θ of homolographic projection point of each line style point of S2 under polar coordinate system is with each line style point on the central axis of wheel hub 21
The relational expressions of corresponding Z values be：
Wherein, each line style point for flowing to molded line S2 refers to each stream in flow path groove 212 and runner fin 213
Point on molded line S2, these line style points are actually point spatially, and phase of the line style point on setting cross section
Answer subpoint to meet formula (2), by formula (2) by wave molded line S1 along flow to molded line S2 carry out stretch sweep sample, to obtain
Flow path groove 212 and runner fin 213.
In the blade 22 of the fan 20 of the utility model, blade suction surface 221 is smooth dimpling face, blade pressure surface
222 be smooth micro-concave surface.
In addition, the utility model additionally provides a kind of micro-wave oven, as shown in figure 5, 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.
The micro-wave oven includes bottom plate 3, back plate 6, magnetron 7, transformer 4 or frequency converter, microwave oven heating cavity body 1, power supply
Line bifurcated 5, high-voltage diode and fan component 2.As shown in fig. 6, fan component 2 includes fan 20, collecting cover 24,25 and of holder
Motor 26.Usual transformer 4 or frequency converter for giving magnetron 7 to power, magnetron 7 generate microwave to the food in cavity 1 into
Row heating, fan component 2 radiate to magnetron 7 and transformer 4 or frequency converter.Wherein, cavity 1 and transformer 4 or frequency conversion
Device is fixed on bottom plate 3, and magnetron 7 is fixed on cavity 1, and holder 25 is fixed by screws in back plate 6, and motor 26 is fixed on
On the holder 25, the shaft of motor 26 passes through the shaft mounting portion of fan 20.
When experiment, using the wind of the utility model that original conventional Ian (as depicted in figs. 1 and 2) and wheel hub 21 deform
Fan 20 carries out temperature to each electronic component in micro-wave oven respectively and rises experiment, and comparing result is as shown in table 1.
1 main heat sink electricity piece temperature of table rises test result
From table 1 it follows that the fan 20 of the utility model reduces fan 20 by the deformation design to wheel hub 21
Internal flow loss, enhance to the heat-sinking capability of electricity piece in micro-wave oven.Meanwhile using the fan of the utility model 20 it
Afterwards, micro-wave oven flow noise reduces 1.5dB, since the noise of micro-wave oven is essentially from cooling fan, the utility model
The noise result of fan 20 also obtained certain improvement.
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, including wheel hub (21) and the circumferentially spaced multiple blades in outer ring (211) along the wheel hub (21)
(22), which is characterized in that in the fan runner between the two neighboring blade (22), the outer ring of the wheel hub (21)
(211) surface is formed with the flow path groove (212) formed along fan runner direction and runner fin (213), the runner
Groove (212) is close to the blade pressure surface (222) of the fan runner, and the runner fin (213) is close to the fan runner
Blade suction surface (221).
2. fan according to claim 1, which is characterized in that in the circumferential direction of the outer ring (211), the flow path groove
(212) it is spaced with the blade pressure surface (222), the runner fin (213) is spaced with the blade suction surface (221).
3. fan according to claim 1, which is characterized in that on the arbitrary cross section of the wheel hub (21), the wheel
Flow path groove molded line on outer ring (211) contour line of hub (21) is connected with runner fin molded line and forms s shape.
4. fan according to claim 3, which is characterized in that the connected flow path groove molded line and runner fin molded line
Be formed as wave molded line S1, the wave molded line S1 to be distributed in SIN function.
5. fan according to claim 3 or 4, which is characterized in that described on the setting cross section of the wheel hub (21)
Polar curve equations of the wave molded line S1 using wheel hub (21) center as pole be：
Wherein, r1 is the basic radius of circle on outer ring (211) surface of the wheel hub (21), and θ 1, θ 2 are respectively the wave molded line
The polar angle of the blade root point of the trailing edge of two adjacent S1 blades (22).
6. fan according to claim 5, which is characterized in that the flow path groove (212) and runner fin (213) are along institute
The molded line S2 that flows to for stating the extension of fan runner direction is S-shaped smooth curve.
7. fan according to claim 6, which is characterized in that the flow path groove (212) and runner fin (213) are institute
The wave molded line S1 stated on setting cross section sweeps sample molding structure along the stretching for flowing to molded line S2.
8. fan according to claim 7, which is characterized in that using the wheel hub (21) center as the polar coordinate system of pole
Under, constitute the polar angle θ of homolographic projection point of each line style point for flowing to molded line S2 under the polar coordinate system and each institute
The relational expression for stating corresponding Z value of the line style point on the central axis of the wheel hub (21) is：
9. fan according to claim 1, which is characterized in that the blade suction surface (221) is smooth dimpling face, described
Blade pressure surface (222) is smooth micro-concave surface.
10. a kind of micro-wave oven, which is characterized in that the micro-wave oven includes the fan described in any one according to claim 1~9
(20)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721929365.8U CN207961061U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721929365.8U CN207961061U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207961061U true CN207961061U (en) | 2018-10-12 |
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ID=63731591
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| CN201721929365.8U Active CN207961061U (en) | 2017-12-30 | 2017-12-30 | Fan and micro-wave oven |
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| CN (1) | CN207961061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105156A (en) * | 2017-12-30 | 2018-06-01 | 广东美的厨房电器制造有限公司 | Fan and micro-wave oven |
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2017
- 2017-12-30 CN CN201721929365.8U patent/CN207961061U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105156A (en) * | 2017-12-30 | 2018-06-01 | 广东美的厨房电器制造有限公司 | Fan and micro-wave oven |
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