CN109882447B - Fan and range hood with same - Google Patents
Fan and range hood with same Download PDFInfo
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- CN109882447B CN109882447B CN201910147707.8A CN201910147707A CN109882447B CN 109882447 B CN109882447 B CN 109882447B CN 201910147707 A CN201910147707 A CN 201910147707A CN 109882447 B CN109882447 B CN 109882447B
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Abstract
The invention discloses a fan and a range hood with the same, wherein the fan comprises a volute and an impeller, the impeller is arranged in the volute, the impeller comprises a wheel disc and a plurality of blades, the blades are arranged at intervals along the circumferential direction of the wheel disc, the range hood further comprises a drainage device, 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 blades, an air outlet hole communicated with the cavity is formed in the surface of the blades, the inner cavity of the wheel disc is communicated with the cavity of the blades, one end of the drainage device is arranged outside the volute and communicated with a volute tongue of the volute, the other end of the drainage device is communicated with the air inlet hole of the wheel disc, noise generated during operation of the range hood is small, and the noise level of the range hood can be improved.
Description
Technical Field
The invention relates to the technical field of kitchen electricity, in particular to a fan and a range hood with the same.
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. When asking about the problems encountered by consumers when using the range hood in the home, 85% of the consumers can mention that the range hood has small suction and unsatisfactory range hood effect, and the consumers generally consider that the suction is large and the range hood effect is good, which is the largest requirement for purchasing 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 one of the problems of the prior art to some extent, and therefore, it is an object of the present invention to provide a fan which generates less noise during operation and can improve the noise level of a range hood.
The above object is achieved by the following technical scheme:
The utility model provides a fan, includes spiral case and impeller, the impeller set up in the spiral case the inside, wherein the impeller includes rim plate and a plurality of fan blade, a plurality of the fan blade is followed the circumference interval setting of rim plate still includes drainage device offer the inner chamber in the rim plate and offer on the rim plate with the inlet port of inner chamber intercommunication set up the cavity in the fan blade and in the surface of fan blade set up with the venthole of cavity intercommunication, the inner chamber of rim plate with the cavity of fan blade is linked together, drainage device one end set up in the spiral case outside and with the volute tongue of spiral case is linked together, the other end with the inlet port of rim plate is linked together.
In some embodiments, the drainage device includes a main pipe and a plurality of branch pipes, the plurality of branch pipes are disposed at one end of the main pipe close to the volute tongue, and the main pipe is communicated with the volute tongue of the volute through the plurality of branch pipes.
In some embodiments, the air inlet hole of the wheel disc is connected with an air inlet pipe, and the other end of the main pipeline is clamped with the air inlet pipe.
In some embodiments, an inner buckle is arranged at the other end of the main pipeline, an outer buckle is arranged at the end part of the air inlet pipe, and the inner buckle is clamped with the outer buckle.
In some embodiments, the connection of the main pipe and the air inlet pipe is filled with a lubricating material.
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 respectively formed at two sides of the fan blade, and the number of air outlets at the air flow inflow position is greater than that at the air flow outflow position on the leeward side of the fan blade;
the number of the air outlet holes at the air inflow position is equal to that of the air outlet holes at the air outflow position on the windward side of the fan blade.
Another object of the present invention is to provide a range hood, which has low noise and can improve the use experience of users.
The above object is achieved by the following technical scheme:
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 fan disclosed by the invention, the air in the volute is led into the impeller through the volute tongue through the additionally arranged drainage device, so that the impeller for actively controlling the fluid separation can be provided with power, high-pressure air enters the inner cavity of the wheel disc and is sprayed out from the air outlet through the cavity of the fan blade, so that the fluid separation phenomenon of the boundary layer of the fan blade can be reduced, the noise of the range hood is obviously reduced, the indexes such as the wind pressure of the range hood are improved, the user experience is improved, and the product competitiveness of a company 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 blower according to an embodiment of the present 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 rear view of a blade in an embodiment of the invention;
Fig. 5 is a schematic perspective view of a range hood according to an embodiment of the present 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. 1,2, 3 and 4, the present embodiment provides a fan, including a volute 10 and an impeller 20, where the impeller 20 is disposed in the volute 10, and the impeller 20 includes a wheel disc 1 and a plurality of fan blades 2, the plurality of fan blades 2 are disposed at intervals along a circumferential direction of the wheel disc 1, and further includes a drainage device 3, an inner cavity 100 is formed in the wheel disc 1, an air inlet 101 communicated with the inner cavity 100 is formed on 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 on a 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, one end of the drainage device 3 is disposed outside the volute 10 and is communicated with a tongue 11 of the volute 10, and the other end of the drainage device is communicated with the air inlet 101 of the wheel disc 1. In this 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 the wheel disc, and the fan blades 2 are communicated with the wheel disc 1. In addition, the additionally arranged drainage device 3 is used for guiding air in the volute 10 into the impeller 20 through the volute tongue 11, high-pressure air entering the inner cavity 100 through the air inlet 101 is ejected from the air outlet 201 after entering the fan blade 2 through the cavity 200, and the high-pressure air is ejected from the air outlet 201 distributed on the surface of the fan blade 2 after entering the fan blade 2, so that necessary air compensation can be provided for a flow separation area to lighten boundary layer separation, thereby reducing noise and improving wind pressure. Specifically, by adding the drainage device 3, about 3% to 10% of the air in a part of the volute 10 can be guided into the impeller and sprayed out by the fan blade 2, so that the cost can be greatly reduced while the impeller 20 can be provided with high-pressure air power, and the price competitiveness of the product can be improved.
The fan of this embodiment can reduce fan blade boundary layer fluid separation phenomenon, and then is showing the noise that reduces fan and range hood, improves indexes such as wind pressure of range hood, improves user experience degree, promotes company's product competitiveness.
In particular, separation control can 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, thereby achieving better control effect, being a new research field generated by the intersection of control science and fluid mechanics, and having high research value in academic and engineering application. When the impeller of the centrifugal fan rotates, the instability of the separated air flow can cause strong rotation noise, so that how to inhibit flow separation is one of the problems which must be solved in the process of improving the performance of the impeller of the fan, and the active separation active control technology is one of the most effective means for solving the problems.
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.
In this embodiment, the drainage device 3 includes a main pipe 31 and a plurality of branch pipes 32, the plurality of branch pipes 32 are disposed at one end of the main pipe 31 close to the volute tongue 11, and the main pipe 31 is communicated with the volute tongue 11 of the volute 10 through the plurality of branch pipes 32. The air in the volute 10 is led out from the volute tongue 11 to the plurality of branch pipelines 32, the air in the plurality of branch pipelines 32 is converged to the main pipeline 31, and then the air flows into the volute 20 through the main pipeline 31, so that the structure is simple and reasonable, and the drainage effect can be improved.
Preferably, the branch pipe 32 is to be set at the maximum pressure position of the volute tongue 11, and the maximum pressure position of the volute tongue can be found through simulation calculation and test. Through simulation calculation and test, the existence of an obvious negative pressure area around the impeller can be found. Since the volute tongue 11 is a positive pressure area, and the impeller is surrounded by a negative pressure area, a flow can be naturally formed, so that the drainage device 3 of the present embodiment can provide the impeller with a required aerodynamic force.
The negative pressure distribution of the impeller circumference is different, the negative pressure at some positions is large, the negative pressure at some positions is small, and the drainage device 3 of the embodiment can automatically compensate according to the pressure of the negative pressure area. The principle is that the smaller the pressure in the negative pressure area, the larger the pressure difference between the position and the volute tongue, the faster the flow speed, the more the injection, the more the compensation, and vice versa.
In addition, the reason why the high pressure of the volute tongue 11 is generated is that the impeller rotates to cause the airflow to strike the volute tongue 11, which causes the volute tongue to strike noise and impeller rotation noise. The drainage device 3 is arranged at the high-pressure position of the volute tongue, so that on one hand, impact air flow can be guided to flow into the bypass drainage device, and further impact of the air flow on the volute tongue is reduced, on the other hand, the high pressure of the volute tongue can be reduced, the pressure gradient between the volute tongue and the impeller is reduced, and further the rotation noise of the impeller can be reduced.
Preferably, the air inlet hole 101 of the wheel disc 1 is connected with the air inlet pipe 4, and the other end of the main pipe 31 is clamped with the air inlet pipe 4. Specifically, the other end of the main pipe 31 is provided with an inner buckle, the end of the air inlet pipe 4 is provided with an outer buckle, and the inner buckle is in clamping connection with the outer buckle, so that the structure is simple, and the connection is convenient and reliable.
In addition, the connection between the main pipe 31 and the intake pipe 4 is filled with a lubricating material, so that the disassembly and assembly can be facilitated, and the air tightness can be improved to some extent.
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.
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: as shown in fig. 5, the present embodiment provides a range hood, which has the fan as in the first embodiment, and has low noise, so as to improve the use experience of the user.
Preferably, the range hood is provided with a box body 5, and the fan is arranged in the box body 5.
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 (9)
1. The utility model provides a fan, includes spiral case (10) and impeller (20), impeller (20) set up in spiral case (10) the inside, wherein impeller (20) include rim plate (1) and a plurality of fan blade (2), a plurality of fan blade (2) are followed the circumference interval setting of rim plate (1), its characterized in that still includes drainage device (3) set up inner chamber (100) in rim plate (1) and set up on rim plate (1) with inlet port (101) of inner chamber (100) intercommunication set up cavity (200) in fan blade (2) and set up in the surface of fan blade (2) with outlet port (201) of cavity (200) intercommunication, inner chamber (100) of rim plate (1) with cavity (200) of fan blade (2) are linked together, drainage device (3) one end set up in the spiral case (10) outside and with spiral case tongue (11) are linked together, the other end with inlet port (101) of rim plate (1) are linked together.
2. A fan according to claim 1, characterized in that the drainage device (3) comprises a main pipe (31) and a plurality of branch pipes (32), a plurality of branch pipes (32) are arranged at one end of the main pipe (31) close to the volute tongue (11), and the main pipe (31) is communicated with the volute tongue (11) of the volute (10) through a plurality of branch pipes (32).
3. A fan according to claim 2, wherein the air inlet (101) of the wheel disc (1) is connected with an air inlet pipe (4), and the other end of the main pipe (31) is clamped with the air inlet pipe (4).
4. A fan according to claim 3, characterized in that an inner clip is provided at the other end of the main pipe (31) and an outer clip is provided at the end of the air inlet pipe (4), the inner clip being in snap-fit with the outer clip.
5. A fan according to claim 4, characterized in that the junction of the main duct (31) and the inlet duct (4) is filled with a lubricating material.
6. A fan according to any one of claims 1 to 5, wherein the fan blade (2) is an aerofoil blade.
7. A fan according to any one of claims 1 to 6, wherein the fan blade (2) has a windward side (21) and a leeward side (22), and the air outlet holes (201) are formed in both 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 the number of the air outlet holes (201) in the leeward side (22).
8. A fan according to claim 7, characterized in that an air inflow position and an air outflow position are formed on both sides of the fan blade (2), respectively, and 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);
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).
9. A range hood having a fan as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147707.8A CN109882447B (en) | 2019-02-27 | 2019-02-27 | Fan and range hood with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147707.8A CN109882447B (en) | 2019-02-27 | 2019-02-27 | Fan and range hood with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109882447A CN109882447A (en) | 2019-06-14 |
| CN109882447B true CN109882447B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910147707.8A Active CN109882447B (en) | 2019-02-27 | 2019-02-27 | Fan and range hood with same |
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| Country | Link |
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| CN (1) | CN109882447B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795006B (en) * | 2020-07-17 | 2021-07-27 | 广东美的白色家电技术创新中心有限公司 | Volute assembly and centrifugal fan |
| CN114251289B (en) * | 2020-09-25 | 2022-08-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and volute tongue and range hood thereof |
| CN114251280B (en) * | 2020-09-25 | 2023-06-30 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
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|---|---|---|---|---|
| DE19710606A1 (en) * | 1997-03-14 | 1998-09-17 | Behr Gmbh & Co | Fan, especially for cooler of internal combustion engine |
| CN101968065A (en) * | 2010-10-15 | 2011-02-09 | 南京埃科净化技术有限公司 | High-efficiency fan filter unit |
| DE102012102145A1 (en) * | 2011-03-14 | 2012-09-20 | Minebea Co., Ltd. | Impeller for use in e.g. turbo fan utilized for ventilation of e.g. different objects, has blades whose high pressure surface exhibits circular arcs when high pressure surface is viewed from rotational axis |
| CN106968975A (en) * | 2017-05-26 | 2017-07-21 | 广东顺威精密塑料股份有限公司 | A kind of low-noise centrifugal fan |
| CN108457906A (en) * | 2018-05-31 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN210196125U (en) * | 2019-02-27 | 2020-03-27 | 华帝股份有限公司 | Fan and range hood with same |
-
2019
- 2019-02-27 CN CN201910147707.8A patent/CN109882447B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710606A1 (en) * | 1997-03-14 | 1998-09-17 | Behr Gmbh & Co | Fan, especially for cooler of internal combustion engine |
| CN101968065A (en) * | 2010-10-15 | 2011-02-09 | 南京埃科净化技术有限公司 | High-efficiency fan filter unit |
| DE102012102145A1 (en) * | 2011-03-14 | 2012-09-20 | Minebea Co., Ltd. | Impeller for use in e.g. turbo fan utilized for ventilation of e.g. different objects, has blades whose high pressure surface exhibits circular arcs when high pressure surface is viewed from rotational axis |
| CN106968975A (en) * | 2017-05-26 | 2017-07-21 | 广东顺威精密塑料股份有限公司 | A kind of low-noise centrifugal fan |
| CN108457906A (en) * | 2018-05-31 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross-flow fan and air conditioner |
| CN210196125U (en) * | 2019-02-27 | 2020-03-27 | 华帝股份有限公司 | Fan and range hood with same |
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| CN109882447A (en) | 2019-06-14 |
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