CN109763996B - Impeller, fan and range hood - Google Patents
Impeller, fan and range hood Download PDFInfo
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- CN109763996B CN109763996B CN201910147712.9A CN201910147712A CN109763996B CN 109763996 B CN109763996 B CN 109763996B CN 201910147712 A CN201910147712 A CN 201910147712A CN 109763996 B CN109763996 B CN 109763996B
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- wheel disc
- fan blade
- air
- fan
- air outlet
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- 238000000926 separation method Methods 0.000 description 21
- 239000012530 fluid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 206010013954 Dysphoria Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 206010033557 Palpitations Diseases 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Abstract
The invention discloses an impeller, a fan and a range hood, wherein the impeller comprises a wheel disc and a plurality of fan blades, the fan blades are arranged at intervals along the circumferential direction of the wheel disc, an inner cavity is formed in the wheel disc, an air inlet hole communicated with the inner cavity is formed in the wheel disc, a cavity is formed in the fan blades, an air outlet hole communicated with the cavity is formed in the surface of the fan blades, the inner cavity of the wheel disc is communicated with the cavity of the fan blades, and noise generated when the fan blades rotate is small.
Description
Technical Field
The invention relates to the technical field of kitchen electricity, in particular to an impeller, a fan and a range hood.
Background
In the related art, the range hood has become one of the indispensable kitchen home appliances in modern families, wherein the air quantity, the air pressure and the noise are core indexes of the range hood. In recent years, the whole industry collectively enters the high-suction age, the high-suction range hood also becomes the first choice for consumers to purchase the range hood, and the market share rising speed of the high-suction range hood is far higher than that of other types of range hoods, so that the high-suction range hood is truly widely accepted by consumers.
In recent years, the domestic smoke ventilator market always pushes the concept of large air quantity and large suction force, and along with the gradual increase of the air quantity, the noise generated by the smoke ventilator is also larger and larger. When cooking, the range hood is started, the speaking sound, the telephone sound, the door bell sound and the sound of children can not be heard, and even the strong noise can cause adverse reactions such as dysphoria, headache, palpitation and the like to housewives and kitchen operators, and the long-term use can cause serious influence on physical and mental health. Therefore, noise becomes a technical problem to be solved urgently in the existing range hood. With the improvement of life quality requirements of people, users pay more attention to the noise parameters of the range hood when purchasing the range hood. It can be said that the noise performance of the smoke machine is a great key factor of the competitiveness of the product. Noise generated by the range hood is mainly concentrated on a fan, and the noise generated by the fan when an impeller of the fan rotates is extremely large, so that the use experience of housewives and kitchen operators is seriously affected.
Disclosure of Invention
The present invention aims to solve, at least to some extent, one of the problems of the related art, and therefore, it is an object of the present invention to provide an impeller which generates little noise when rotated.
The above object is achieved by the following technical scheme:
the impeller comprises a wheel disc and a plurality of fan blades, wherein the fan blades are arranged at intervals along the circumferential direction of the wheel disc, an inner cavity is formed in the wheel disc, an air inlet hole communicated with the inner cavity is formed in the wheel disc, a cavity is formed in the fan blades, an air outlet hole communicated with the cavity is formed in the surface of the fan blades, and the inner cavity of the wheel disc is communicated with the cavity of the fan blades.
In some embodiments, the fan blade is an airfoil fan blade.
In some embodiments, the fan blade has a windward side and a leeward side, and the windward side and the leeward side are provided with air outlets, and the number of the air outlets on the windward side is less than the number of the air outlets on the leeward side.
In some embodiments, an air flow inflow position and an air flow outflow position are formed on two sides of the fan blade respectively, and the number of air outlets at the air flow inflow position is greater than the number of air outlets at the air flow outflow position on the leeward side of the fan blade.
In some embodiments, on the windward side of the fan blade, the number of air outlet holes at the air flow inflow position is equal to the number of air outlet holes at the air flow outflow position.
In some embodiments, the device further comprises a supercharging device, an air outlet end of the supercharging device is communicated with an air inlet hole of the wheel disc, and high-pressure air output by the supercharging device can be adjusted.
In some embodiments, the motor further comprises a first end ring and a second end ring, wherein the first end ring, the wheel disc and the second end ring are arranged at intervals, the fan blades are arranged between the first end ring and the wheel disc at intervals in the circumferential direction, and each fan blade is respectively connected with the first end ring and the wheel disc;
the fan blades are circumferentially arranged between the wheel disc and the second end ring at intervals, and each fan blade is connected with the wheel disc and the second end ring respectively.
Another object of the present invention is to provide a blower that improves the noise level of a range hood.
The above object is achieved by the following technical scheme:
a fan having an impeller as described above.
Still another object of the present invention is to provide a range hood, which has low noise and can improve the user experience.
A range hood having a fan as described above.
Compared with the prior art, the invention has at least the following effects:
1. according to the impeller, the novel fan blade structure is designed, and the fluid separation active control method is adopted, so that the phenomenon of fluid separation of the boundary layer of the fan blade can be reduced, the noise level of the range hood can be remarkably improved, meanwhile, the fan blade can spray part of air, the wind pressure can be improved, and the user experience is improved.
Other advantageous results of the invention will be described in the detailed description with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic perspective view of a impeller in an embodiment of the invention;
FIG. 2 is a cross-sectional view of the impeller in an embodiment of the invention;
FIG. 3 is a schematic front view of a fan blade in an embodiment of the present invention;
fig. 4 is a schematic back view of a leaf in an embodiment of the invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Embodiment one: as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the present embodiment provides an impeller, which includes a wheel disc 1 and a plurality of fan blades 2, the plurality of fan blades 2 are disposed along the circumferential direction of the wheel disc 1 at intervals, an inner cavity 100 is formed in the wheel disc 1, an air inlet 101 communicated with the inner cavity 100 is formed in the wheel disc 1, a cavity 200 is formed in the fan blades 2, an air outlet 201 communicated with the cavity 200 is formed in the surface of the fan blades 2, the inner cavity 100 of the wheel disc 1 is communicated with the cavity 200 of the fan blades 2, in the present embodiment, the wheel disc 1 and the plurality of fan blades 2 all adopt a hollow structure, the wheel disc 1 is made into a hollow structure, high-pressure air can circulate inside, and the fan blades 2 are communicated with the wheel disc 1. In addition, the wheel disc 1 is communicated with the high-pressure air to spray the high-pressure air out through the air outlet holes 201 on the surface of the fan blade 2, so that the effect of reducing flow separation is achieved. The high-pressure air entering the inner cavity 100 through the air inlet 101 is ejected from the air outlet 201 after passing through the cavity 200, and the high-pressure air enters the fan blade 2 and is ejected from the air outlet 201 distributed on the surface of the fan blade 2, so that necessary air compensation can be provided for the flow separation area to reduce boundary layer separation, thereby reducing noise and improving wind pressure.
The impeller of this embodiment adopts the fluid separation initiative control method through designing novel fan blade structure, can realize reducing fan blade boundary layer fluid separation phenomenon, can show the noise level that improves range hood, simultaneously because the fan blade can spray partial air, also can bring the improvement of wind pressure, brings the promotion of user experience sense.
Specifically, the separation control may be divided into passive flow control (Passive Flow Control, PFC) and active flow control (Active Flow Control, AFC).
The separation active control (Phase-compensation control) can change the flow state more flexibly, accurately and effectively by injecting controllable energy into the flow field, so that a better control effect is achieved, and the separation active control is a new research field generated by the intersection of control science and fluid mechanics, and has high research value in academic and engineering application;
in the background technology, when the impeller of the range hood rotates, a strong pressure gradient is formed on the windward side and the leeward side of the impeller of the range hood, and a serious boundary layer fluid separation phenomenon is caused, and the phenomenon is verified by experiments and simulation, so that according to a simulated wheel disc pressure section schematic diagram, a great deal of flow separation exists on the windward side and the leeward side of the fan blade. The invention refers to the thought of active control, innovatively designs the impeller of the existing range hood, and reduces the boundary layer flow separation phenomenon of the fan blade.
Preferably, the fan blade 2 is an airfoil fan blade, and the blade profile of the fan blade 2 is improved to change from a sheet-shaped thin plate structure into an airfoil fan blade, so that the advanced separation phenomenon of a boundary layer can be weakened.
Further, the fan blade 2 has a windward side 21 and a leeward side 22, and the windward side 21 and the leeward side 22 are provided with air outlet holes 201, and the number of the air outlet holes 201 on the windward side 21 is less than the number of the air outlet holes 201 on the leeward side 22. As can be seen from simulation results, the flow separation is strong on the leeward side 22 of the fan blade 2, and the flow separation of the windward side 21 of the fan blade 2 is weak, so that the number of the air outlet holes 201 on the leeward side 22 of the fan blade 2 is relatively large, and the number of the air outlet holes 201 on the windward side 21 is relatively small, so as to provide different additional air supplementing flows, and better reduce the boundary layer separation.
Further, an air inflow position and an air outflow position are formed on two sides of the fan blade 2 respectively, the number of air outlet holes 201 at the air inflow position is greater than the number of air outlet holes 201 at the air outflow position on the leeward side 22 of the fan blade 2, and the number of air outlet holes 201 at the air inflow position is equal to the number of air outlet holes 201 at the air outflow position on the windward side 21 of the fan blade 2. As can be seen from simulation results, the degree of boundary layer separation is different between the airflow inflow position and the airflow outflow position of the fan blade 2, and the degree of separation between the windward side 21 and the leeward side 22 is also different, specifically, the boundary layer separation is more serious at the airflow inflow position than at the airflow outflow position of the leeward side 22 of the fan blade 2, so that the number of the air outlets 201 at the airflow inflow position of the leeward side 22 of the fan blade 2 is greater than the number of the air outlets 201 at the airflow outflow position. The boundary layer separation is basically consistent from the air inflow position to the air outflow position of the windward side 21 of the fan blade 2, so that equal air outlet holes 201 can be arranged on the windward side 21 of the fan blade 2.
Preferably, the device further comprises a pressurizing device 3, the air outlet end of the pressurizing device 3 is communicated with the air inlet 101 of the wheel disc 1, and high-pressure air output by the pressurizing device 3 can be adjusted. Because different optimal injection speeds are needed under different impeller rotation speeds to achieve a better control effect, the high-pressure air pressure of the supercharging device 3 can be regulated to meet the air jet flow requirements of different rotation speeds.
In this embodiment, the device further includes a first end ring 41 and a second end ring 42, where the first end ring 41, the disk 1 and the second end ring 42 are arranged at intervals, and fan blades 2 are arranged between the first end ring 41 and the disk 1 at intervals in the circumferential direction, and each fan blade 2 is connected with the first end ring 41 and the disk 1 respectively; the fan blades 2 are arranged between the wheel disc 1 and the second end ring 42 at circumferential intervals, each fan blade 2 is connected with the wheel disc 1 and the second end ring 42 respectively, the design is simple and ingenious, the noise is reduced, the wind pressure can be improved, and the use experience is improved for consumers.
Embodiment two: the present embodiment provides a fan having the impeller as described in the first embodiment, which can improve the noise level of the range hood due to the impeller as described in the first embodiment.
Embodiment III: the embodiment provides a range hood, which is provided with the fan as in the second embodiment, and has low noise, so that the use experience of a user can be improved.
What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (8)
1. An impeller comprises a wheel disc (1) and a plurality of fan blades (2), wherein the fan blades (2) are arranged at intervals along the circumferential direction of the wheel disc (1),
an inner cavity (100) is formed in the wheel disc (1), an air inlet hole (101) communicated with the inner cavity (100) is formed in the wheel disc (1), a cavity (200) is formed in the fan blade (2), air outlet holes (201) communicated with the cavity (200) are formed in the surface of the fan blade (2), the inner cavity (100) of the wheel disc (1) is communicated with the cavity (200) of the fan blade (2), the fan blade (2) is provided with a windward side (21) and a leeward side (22), the air outlet holes (201) are formed in the windward side (21) and the leeward side (22), and the number of the air outlet holes (201) in the windward side (21) is smaller than that of the air outlet holes (201) in the leeward side (22).
2. An impeller according to claim 1, wherein,
the fan blade (2) is an airfoil fan blade.
3. An impeller according to claim 1, wherein,
an air flow inflow position and an air flow outflow position are respectively formed on two sides of the fan blade (2), and the number of air outlet holes (201) at the air flow inflow position is greater than that of air outlet holes (201) at the air flow outflow position on the leeward surface (22) of the fan blade (2).
4. An impeller according to claim 3, wherein,
the number of the air outlet holes (201) at the air inflow position is equal to the number of the air outlet holes (201) at the air outflow position on the windward side (21) of the fan blade (2).
5. An impeller according to any one of claims 1 to 4, wherein,
the novel rotary type air compressor further comprises a supercharging device (3), the air outlet end of the supercharging device (3) is communicated with the air inlet hole (101) of the wheel disc (1), and high-pressure air output by the supercharging device (3) can be adjusted.
6. An impeller according to any one of claims 1 to 4, wherein,
the motor rotor comprises a motor rotor body, a motor rotor body and a motor rotor, and is characterized by further comprising a first end ring (41) and a second end ring (42), wherein the first end ring (41), a wheel disc (1) and the second end ring (42) are arranged at intervals, the fan blades (2) are circumferentially arranged between the first end ring (41) and the wheel disc (1) at intervals, and each fan blade (2) is respectively connected with the first end ring (41) and the wheel disc (1);
the fan blades (2) are arranged between the wheel disc (1) and the second end ring (42) at circumferential intervals, and each fan blade (2) is respectively connected with the wheel disc (1) and the second end ring (42).
7. A fan is characterized in that,
an impeller according to any one of claims 1 to 6.
8. A range hood is characterized in that,
a fan as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147712.9A CN109763996B (en) | 2019-02-27 | 2019-02-27 | Impeller, fan and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147712.9A CN109763996B (en) | 2019-02-27 | 2019-02-27 | Impeller, fan and range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109763996A CN109763996A (en) | 2019-05-17 |
| CN109763996B true CN109763996B (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910147712.9A Active CN109763996B (en) | 2019-02-27 | 2019-02-27 | Impeller, fan and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109763996B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552899A (en) * | 2019-08-21 | 2019-12-10 | 天津大学 | multi-wing centrifugal fan for ventilator with built-in guide vanes |
| CN114483644B (en) * | 2020-11-12 | 2024-03-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal impeller, centrifugal fan and fume absorbing equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05332283A (en) * | 1992-06-03 | 1993-12-14 | Matsushita Electric Ind Co Ltd | Air blowing device |
| CN102425459A (en) * | 2011-11-21 | 2012-04-25 | 西安交通大学 | Heavy-type combustion engine high-temperature turbine double-medium cooling blade |
| CN203570676U (en) * | 2013-12-10 | 2014-04-30 | 四川东能节能技术有限公司 | Fan impeller |
| CN204200676U (en) * | 2014-10-27 | 2015-03-11 | 安徽科达埃尔压缩机有限公司 | Centrifugal blower fan blade wheel |
| DE102014009735A1 (en) * | 2014-07-02 | 2016-01-07 | Rosswag Gmbh | Blade and impeller of a turbomachine, as well as manufacturing process for it |
| CN209976883U (en) * | 2019-02-27 | 2020-01-21 | 华帝股份有限公司 | Impeller, fan and range hood |
-
2019
- 2019-02-27 CN CN201910147712.9A patent/CN109763996B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05332283A (en) * | 1992-06-03 | 1993-12-14 | Matsushita Electric Ind Co Ltd | Air blowing device |
| CN102425459A (en) * | 2011-11-21 | 2012-04-25 | 西安交通大学 | Heavy-type combustion engine high-temperature turbine double-medium cooling blade |
| CN203570676U (en) * | 2013-12-10 | 2014-04-30 | 四川东能节能技术有限公司 | Fan impeller |
| DE102014009735A1 (en) * | 2014-07-02 | 2016-01-07 | Rosswag Gmbh | Blade and impeller of a turbomachine, as well as manufacturing process for it |
| CN204200676U (en) * | 2014-10-27 | 2015-03-11 | 安徽科达埃尔压缩机有限公司 | Centrifugal blower fan blade wheel |
| CN209976883U (en) * | 2019-02-27 | 2020-01-21 | 华帝股份有限公司 | Impeller, fan and range hood |
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| Publication number | Publication date |
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| CN109763996A (en) | 2019-05-17 |
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