CN217401261U - Centrifugal fan and range hood - Google Patents
Centrifugal fan and range hood Download PDFInfo
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- CN217401261U CN217401261U CN202221333661.2U CN202221333661U CN217401261U CN 217401261 U CN217401261 U CN 217401261U CN 202221333661 U CN202221333661 U CN 202221333661U CN 217401261 U CN217401261 U CN 217401261U
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Abstract
The utility model relates to a kitchen appliances field discloses a centrifugal fan and range hood. The centrifugal fan comprises an outer rotor motor and an impeller, the outer rotor motor comprises a motor stator and a motor rotor which can rotate relative to the motor stator, the impeller is connected with the motor rotor, and the axial height H of the impeller b Outer diameter D of impeller 2 Is the width diameter of the impellerRatio of
And is
The distance between the axial outer end face of the motor rotor and the axial outer end face of the motor stator is the maximum axial height H of the outer rotor motor m Maximum axial height H of outer rotor motor m Axial height H from impeller b Is the ratio of the height of the motor to the height of the impeller
And is
Under the condition of meeting the requirement of a limited installation space with a compact structure, the pneumatic power-applying device still has better pneumatic power-applying capacity, can reduce the axial size and has good pneumatic performance.
Description
Technical Field
The utility model relates to a kitchen appliances field especially relates to a centrifugal fan and range hood.
Background
The fan is used as a core power component of the range hood, the aerodynamic performance of the fan directly determines the overall working performance of the range hood, and the multi-wing centrifugal fan is widely applied to the range hood due to the characteristics of high pressure coefficient, large flow coefficient and low working noise.
The built-in multi-wing centrifugal fan in the traditional side-suction type or near-suction type range hood has large structural dimension, especially large axial dimension, so that the fan cannot be placed downwards, the distance between the fan inlet and the oil pan smoke-generating position is far, and the oil smoke-absorbing effect of the range hood is further influenced.
SUMMERY OF THE UTILITY MODEL
Based on the above problem, the utility model aims at providing a centrifugal fan and range hood, axial dimension is little, and required axial installation space is little.
In order to realize the purpose, the following technical scheme is provided:
in a first aspect, the present invention provides a centrifugal fan, including:
the outer rotor motor comprises a motor stator and a motor rotor which can rotate relative to the motor stator;
the impeller is connected with the motor rotor;
axial height H of the impeller b And the outer diameter D of the impeller 2 The ratio of (A) to (B) is the width-to-diameter ratio of the impeller
And is
The distance between the axial outer end face of the motor rotor and the axial outer end face of the motor stator is the maximum axial height H of the outer rotor motor m Maximum axial height H of the outer rotor motor m Axial height H from the impeller b Is the ratio of the height of the motor to the height of the impeller
And is
As the utility model provides a centrifugal fan's alternative, the internal diameter D of impeller 1 And the outer diameter D of the impeller 2 Is the ratio of the inner diameter to the outer diameter of the impeller
And is
Outside of the impellerDiameter D 2 The value range of D is more than or equal to 200mm 2 Less than or equal to 400 mm; the outer diameter D of the motor rotor m D is within the range of 100mm m ≤200mm。
As the utility model provides a centrifugal fan's alternative, the impeller includes hanging wall, lower wall and a plurality of blade, the hanging wall with the lower wall respectively with every the tip fixed connection of blade, electric motor rotor with lower wall fixed connection.
As the utility model provides a centrifugal fan's alternative, external rotor electric machine with minimum axial distance H between the hanging wall bm Axial height H from the impeller b Is the motor to impeller spacing ratio
And is
As the utility model provides a centrifugal fan's alternative, the lower wall orientation the protruding first installation base that is equipped with of hanging wall, be provided with on electric motor rotor's the periphery lateral wall with the second installation base that first installation base is connected.
As the utility model provides a centrifugal fan's alternative, first installation base with be provided with first damping pad between the second installation base.
As the utility model provides a centrifugal fan's alternative still includes the spiral case, the impeller is located in the spiral case, be provided with the motor cabinet on the spiral case, motor stator with motor cabinet fixed connection.
As the utility model provides a centrifugal fan's alternative still include with spiral case fixed connection's wind-guiding circle, one side of spiral case is provided with the air intake, the wind-guiding circle is located air intake department, the motor cabinet set up in the opposite side of spiral case.
As the utility model provides a centrifugal fan's alternative, motor stator with be provided with the second damping between the motor cabinet and fill up.
In a second aspect, the utility model also provides a range hood, including foretell centrifugal fan.
The utility model has the advantages that:
the utility model provides a centrifugal fan, the axial height H of impeller b Outer diameter D of impeller 2 The ratio of (A) to (B) is the width-to-diameter ratio of the impeller
And is provided with
The distance between the axial outer end face of the motor rotor and the axial outer end face of the motor stator is the maximum axial height H of the outer rotor motor m Maximum axial height H of outer rotor motor m Axial height H from impeller b The ratio of the height of the motor to the height of the impeller
And is
The outer rotor motor is connected with the impeller with the small width-diameter ratio, so that the pneumatic power-applying capacity is good under the condition of meeting the requirement of a limited installation space with a compact structure, the axial size can be reduced, the pneumatic performance is good, the oil smoke absorption effect is ensured, the user experience is improved, and the product competitiveness is enhanced.
The utility model provides a range hood, including foretell centrifugal fan, centrifugal fan's axial dimension is little, and axial installation space demand is little, and centrifugal fan can more be close to the position that the oil smoke generated, has improved the oil absorption cigarette effect, and simultaneously, centrifugal fan that axial dimension is little has also reduced range hood's thickness requirement, can satisfy the user to ultra-thin range hood's demand.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a centrifugal fan according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of a centrifugal fan according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a centrifugal fan according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an outer rotor motor in a centrifugal fan according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an impeller in a centrifugal fan according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an outer rotor motor and an impeller in a centrifugal fan according to an embodiment of the present invention.
In the figure:
1-an outer rotor motor; 2-an impeller; 3-a first damping pad; 4-a volute; 5-wind guide ring; 6-a second damping pad;
11-a motor stator; 12-a motor rotor; 121-a second mounting boss;
21-upper tray; 22-lower disc; 221-a first mounting boss; 23-a blade;
41-motor base; 42-air inlet.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 6, the present embodiment provides a centrifugal fan including an outer rotor motor 1 and an impeller 2. The outer rotor motor 1 comprises a motor stator 11 and a motor rotor 12 which can rotate relative to the motor stator 11, the inner diameter of the motor rotor 12 is larger than the outer diameter of the motor stator 11, the motor rotor 12 always rotates around the outer edge side of the motor stator 11 to work, and the impeller 2 is connected with the motor rotor 12. The relative rotation of the motor rotor 12 and the motor stator 11 is prior art and will not be described in detail herein.
Axial height H of impeller 2 b Outer diameter D of impeller 2 2 The ratio of (A) to (B) is the width-to-diameter ratio of the impeller
And is
The distance between the axial outer end face of the motor rotor 12 and the axial outer end face of the motor stator 11 is the maximum axial height H of the outer rotor motor 1 m Maximum axial height H of outer rotor motor 1 m Axial height H from the impeller 2 b The ratio of the height of the motor to the height of the impeller
And is
The outer rotor motor 1 is connected with the impeller 2 with the small width-diameter ratio, so that the pneumatic power-applying capacity is good under the condition that the requirement of a limited installation space with a compact structure is met, the axial size can be reduced, the pneumatic performance is good, the oil smoke suction effect is guaranteed, and the user experience is improved.
To ensure good aerodynamic performance of the centrifugal fan, the impeller 2 preferably has an inner diameter D 1 Outer diameter D of impeller 2 2 The ratio of (A) to (B) is the ratio of the inner diameter to the outer diameter of the impeller
And is
Outer diameter D of impeller 2 2 The value range of D is more than or equal to 200mm 2 Less than or equal to 400 mm. To ensure that the centrifugal fan has a good pneumatic power capability, the outer diameter D of the motor rotor 12 is preferably selected m D is within the range of 100mm m ≤200mm。
Optionally, the impeller 2 includes an upper disc 21, a lower disc 22 and a plurality of blades 23, the upper disc 21 and the lower disc 22 are fixedly connected to an end of each blade 23, respectively, and the motor rotor 12 is fixedly connected to the lower disc 22. The upper disc 21 is circular, the lower disc 22 is a revolving body structure, the lower disc 22 and the upper disc 21 are coaxially arranged, the plurality of blades 23 are uniformly distributed in a circumferential shape, each blade 23 is obliquely arranged, an air outlet is formed between every two adjacent blades 23, and when the impeller 2 rotates, air in the impeller 2 is accelerated under the stirring of the blades 23 and is blown out through the air outlet. Since the lower disc 22 needs to be coupled to the motor rotor 12, the area of the lower disc 22 is larger than that of the upper disc 21. The outer diameter of the impeller 2 is specifically the outer diameter of the upper disc 21.
Preferably, minimum axial distance H between outer rotor motor 1 and upper disc 21 bm Axial height H from the impeller 2 b Is the motor to impeller spacing ratio
And is provided with
The pneumatic power machine still has better pneumatic power-applying capacity under the condition of meeting the requirement of a limited installation space with a compact structure.
In order to facilitate the transmission of the rotation torque of the external rotor motor 1, optionally, the lower disc 22 is convexly provided with a first mounting boss 221 toward the upper disc 21, and a second mounting boss 121 connected with the first mounting boss 221 is provided on the outer circumferential side wall of the motor rotor 12. The axial height of the lower disc 22 is effectively reduced, the air inlet space area is enlarged, the air inlet flow is blocked less, the impact of high-speed airflow can be obviously reduced, and the pneumatic noise is reduced. The lower disc 22 does not need to form a cavity at the lower part of the impeller 2 with a larger height through a drawing process to realize space avoidance, thereby effectively reducing the processing and manufacturing difficulty of the impeller 2, improving the working stability of the impeller 2 and reducing the aerodynamic noise caused by unstable rotation. The first mounting boss 221 and the second mounting boss 121 may be circular structures, the first mounting boss 221 and the second mounting boss 121 are respectively provided with connecting holes uniformly distributed along the circumferential direction, and the first mounting boss 221 and the second mounting boss 121 are fixedly connected through bolts at corresponding positions.
In order to absorb the vibration impact transmitted from the impeller 2 to the outer rotor motor 1, thereby reducing noise, a first vibration-damping pad 3 is optionally provided between the first mounting boss 221 and the second mounting boss 121. The first vibration damping pad 3 can be a rubber pad, is convenient to obtain materials, and has low cost and good vibration damping effect.
Specifically, this centrifugal fan still includes spiral case 4, and impeller 2 is located spiral case 4, is provided with motor cabinet 41 on the spiral case 4, motor stator 11 and motor cabinet 41 fixed connection. The interior of the volute 4 forms an air passage for guiding and discharging the air flow accelerated by the impeller 2. Connecting holes which are uniformly distributed along the circumferential direction are respectively formed in the motor stator 11 and the motor base 41, and the motor stator 11 is fixedly connected with the motor base 41 through bolt connection at corresponding positions. To further reduce noise, a second vibration damping pad 6 is optionally provided between the motor stator 11 and the motor mount 41.
In order to conveniently guide the airflow into the inside of the centrifugal fan, optionally, the centrifugal fan further includes an air guiding ring 5 fixedly connected to the volute 4, an air inlet 42 is disposed at one side of the volute 4, the air guiding ring 5 is located at the air inlet 42, and the motor base 41 is disposed at the other side of the volute 4. The mode of unilateral air inlet is adopted, the space of the whole gas flow channel is ensured, and the thickness of the centrifugal fan is smaller under the condition of meeting certain pneumatic performance.
The centrifugal fan provided by the embodiment adopts the outer rotor motor 1 to be connected with the impeller 2 with the small width-diameter ratio, and still has good pneumatic acting capacity under the condition of meeting the requirement of a limited installation space with compact structure, so that the axial size can be reduced, the centrifugal fan has good pneumatic performance, the oil fume suction effect is ensured, the user experience is improved, and the product competitiveness is enhanced.
The embodiment also provides a range hood, including foretell centrifugal fan, centrifugal fan's axial dimension is little, and axial installation space demand is little, and centrifugal fan can be more close to the position that the oil smoke generated, has improved the oil absorption cigarette effect, and simultaneously, centrifugal fan that axial dimension is little has also reduced range hood's thickness requirement, can satisfy user's demand to ultra-thin range hood.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A centrifugal fan, comprising:
the outer rotor motor (1) comprises a motor stator (11) and a motor rotor (12) which can rotate relative to the motor stator (11);
an impeller (2) connected to the motor rotor (12);
the axial height H of the impeller (2) b With the outer diameter D of the impeller (2) 2 The ratio of (A) to (B) is the width-to-diameter ratio of the impeller
And is provided with
The distance between the axial outer end face of the motor rotor (12) and the axial outer end face of the motor stator (11) is the maximum axial height H of the outer rotor motor (1) m The maximum axial height H of the outer rotor motor (1) m Axial height H from the impeller (2) b The ratio of the height of the motor to the height of the impeller
And is
2. Centrifugal fan according to claim 1, wherein the impeller (2) has an inner diameter D 1 With the outer diameter D of the impeller (2) 2 The ratio of (A) to (B) is the ratio of the inner diameter to the outer diameter of the impeller
And is provided with
The outer diameter D of the impeller (2) 2 The value range of D is more than or equal to 200mm 2 Less than or equal to 400 mm; the outer diameter D of the motor rotor (12) m D is within the range of 100mm m ≤200mm。
3. The centrifugal fan according to claim 1, wherein the impeller (2) comprises an upper disc (21), a lower disc (22) and a plurality of blades (23), the upper disc (21) and the lower disc (22) are fixedly connected with the end of each blade (23), respectively, and the motor rotor (12) is fixedly connected with the lower disc (22).
4. Centrifugal fan according to claim 3, wherein the minimum axial distance H between the outer rotor motor (1) and the upper disc (21) bm Axial height H from the impeller (2) b Is the motor to impeller spacing ratio
And is
5. The centrifugal fan as claimed in claim 3, wherein the lower disc (22) is provided with a first mounting boss (221) protruding toward the upper disc (21), and a second mounting boss (121) connected to the first mounting boss (221) is provided on an outer circumferential side wall of the motor rotor (12).
6. The centrifugal fan according to claim 5, wherein a first damping pad (3) is arranged between the first mounting boss (221) and the second mounting boss (121).
7. The centrifugal fan according to any one of claims 1-6, further comprising a volute (4), wherein the impeller (2) is located in the volute (4), a motor base (41) is disposed on the volute (4), and the motor stator (11) is fixedly connected with the motor base (41).
8. The centrifugal fan according to claim 7, further comprising an air guiding ring (5) fixedly connected to the volute (4), wherein an air inlet (42) is formed in one side of the volute (4), the air guiding ring (5) is located at the air inlet (42), and the motor base (41) is arranged on the other side of the volute (4).
9. Centrifugal fan according to claim 7, wherein a second damping pad (6) is arranged between the motor stator (11) and the motor mount (41).
10. A range hood comprising a centrifugal fan according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221333661.2U CN217401261U (en) | 2022-05-30 | 2022-05-30 | Centrifugal fan and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221333661.2U CN217401261U (en) | 2022-05-30 | 2022-05-30 | Centrifugal fan and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217401261U true CN217401261U (en) | 2022-09-09 |
Family
ID=83147065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221333661.2U Active CN217401261U (en) | 2022-05-30 | 2022-05-30 | Centrifugal fan and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217401261U (en) |
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2022
- 2022-05-30 CN CN202221333661.2U patent/CN217401261U/en active Active
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