CN113137381A

CN113137381A - Centrifugal fan for bladeless air supply device

Info

Publication number: CN113137381A
Application number: CN202010060619.7A
Authority: CN
Inventors: 张玮玮; 刘镇根
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-07-20

Abstract

The invention discloses a centrifugal fan for a bladeless air supply device, which comprises: a volute having a volute inlet; the wind wheel is rotatably arranged in the volute and is provided with a wind wheel outer diameter D and a wind wheel inner diameter D, wherein D and D satisfy the relation: D/D is more than or equal to 0.7 and less than or equal to 0.9; and the driving motor is connected with the wind wheel and is used for driving the wind wheel to rotate in the volute. Therefore, the D/D is more than or equal to 0.7 and less than or equal to 0.9, the air pressure in the volute can be improved, the air resistance in the air duct of the air supply device can be overcome, and the working efficiency of the centrifugal fan can be improved.

Description

Centrifugal fan for bladeless air supply device

Technical Field

The invention relates to the field of domestic appliances, in particular to a centrifugal fan for a bladeless air supply device.

Background

In the related art, the air supply device (i.e. bladeless fan) is used by users due to its advantages of safety, easy cleaning, and beautiful appearance, but when the centrifugal fan of the air supply device works, the air resistance in the air duct of the air supply device is large, which results in the efficiency reduction of the centrifugal fan.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, an object of the present invention is to provide a centrifugal fan for a bladeless air supply device, which can increase the air pressure in a volute, overcome the air resistance in an air duct of the air supply device, and thus increase the working efficiency of the centrifugal fan.

The centrifugal fan for the bladeless air supply device comprises the following components: a volute having a volute inlet; the wind wheel is rotatably arranged in the volute and is provided with a wind wheel outer diameter D and a wind wheel inner diameter D, wherein D and D satisfy the relation: D/D is more than or equal to 0.7 and less than or equal to 0.9; and the driving motor is connected with the wind wheel and is used for driving the wind wheel to rotate in the volute.

According to the centrifugal fan for the bladeless air supply device, D/D is more than or equal to 0.7 and less than or equal to 0.9, the air pressure in the volute can be improved, the air resistance in the air duct of the air supply device can be overcome, and therefore the working efficiency of the centrifugal fan can be improved.

In some examples of the invention, the volute inlet comprises: the first volute air inlet and the second volute air inlet are respectively formed on two axial side surfaces of the volute; the wind wheel includes: the wind wheel body is in with the setting wind wheel mounting panel in the wind wheel body, the wind wheel mounting panel will the wind wheel body is followed long wind wheel body and short wind wheel body are separated to the axial of wind wheel, the axial length of long wind wheel body is greater than the axial length of short wind wheel body, long wind wheel body corresponds and is close to first spiral case air intake, short wind wheel body corresponds and is close to second spiral case air intake, wherein driving motor sets up this internal and with the wind wheel mounting panel links to each other of short wind wheel.

In some examples of the invention, a radial dimension of the first volute air inlet is greater than a radial dimension of the second volute air inlet.

In some examples of the invention, the short rotor body has an axial length H1 and the long rotor body has an axial length H2, wherein H2 and H1 satisfy the relationship: H1/H2 is more than or equal to 0.5 and less than or equal to 1.

In some examples of the present invention, the centrifugal fan for a bladeless air blowing device further includes: and the motor mounting plate is used for mounting the driving motor and surrounds the second volute air inlet.

In some examples of the present invention, the centrifugal fan for a bladeless air blowing device further includes: and the air inlet grille is arranged at the first volute air inlet and/or the second volute air inlet.

In some examples of the invention, the wind wheel comprises a plurality of blades spaced apart along a circumferential direction of the wind wheel, the blades are arc-shaped, and a chord length of the blades is L, which satisfies a relation: l is more than or equal to 15mm and less than or equal to 25 mm; the spacing distance between two adjacent blades is a, and the relationship is satisfied: a is more than or equal to 0.3L and less than or equal to 0.7L.

In some examples of the invention, the blade has a thickness t that satisfies the relationship: t is more than or equal to 1mm and less than or equal to 3 mm.

In some examples of the invention, the inlet angle of the blade is α, satisfying the relationship: alpha is more than or equal to 40 degrees and less than or equal to 90 degrees.

In some examples of the invention, the blade has an exit angle θ that satisfies the relationship: theta is more than or equal to 120 degrees and less than or equal to 170 degrees.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is an exploded view of a centrifugal fan according to an embodiment of the present invention;

fig. 2 is a front view of a rotor of a centrifugal fan according to an embodiment of the invention;

fig. 3 is a side view of a wind wheel of a centrifugal fan according to an embodiment of the invention.

Reference numerals:

a centrifugal fan 100;

a volute 101; a volute inlet 1014; a first volute air inlet 1015; second volute intake 1016;

a wind wheel 102; a wind wheel body 1021; a wind wheel mounting plate 1022; long wind wheel body 1023; a short wind wheel body 1024; a vane 1025;

a drive motor 105; a motor mounting plate 106; an air intake grill 107.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A centrifugal fan 100 for a bladeless air blowing device according to an embodiment of the present invention is described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, a centrifugal fan 100 according to an embodiment of the present invention includes: volute 101, wind wheel 102 and drive motor 105. Volute 101 has volute intake 1014, and the wind outside centrifugal fan 100 can flow into volute 101 through volute intake 1014, and wind wheel 102 rotationally sets up in volute 101, and wind wheel 102 has wind wheel 102 external diameter D and wind wheel 102 internal diameter D, and wherein D and D satisfy the relation: D/D is more than or equal to 0.7 and less than or equal to 0.9, the driving motor 105 is connected with the wind wheel 102, and the driving motor 105 is used for driving the wind wheel 102 to rotate in the volute 101.

Specifically, the outer diameter D of the wind wheel 102 may be set to 150mm, the inner diameter D of the wind wheel 102 may be set to 120mm, D/D is 0.8, and the rotation speed of the wind wheel 102 may be set to 1500rpm to 3000 rpm. When the centrifugal fan 100 works, the driving motor 105 drives the wind wheel 102 to rotate, and in the rotating process of the wind wheel 102, the wind pressure in the volute 101 can be increased, and the air resistance of 100Pa-300Pa in the wind channel of the air supply device can be overcome, so that the working efficiency of the centrifugal fan 100 can be increased, the working performance of the centrifugal fan 100 can be improved, and the centrifugal fan 100 is simple in structure and can reduce the manufacturing cost of the centrifugal fan 100.

Therefore, D/D is more than or equal to 0.7 and less than or equal to 0.9, the air pressure in the volute 101 can be improved, the air resistance in the air duct of the air supply device can be overcome, and the working efficiency of the centrifugal fan 100 can be improved.

In some embodiments of the present invention, as shown in fig. 1 and 2, the volute intake 1014 may include: the first volute inlet 1015 and the second volute inlet 1016 are formed on two axial sides of the volute 101, respectively, it can also be understood that the first volute inlet 1015 is disposed on one axial side of the volute 101, and the second volute inlet 1016 is disposed on the other axial side of the volute 101.

The wind rotor 102 may include: wind wheel body 1021 and the wind wheel mounting panel 1022 of setting in wind wheel body 1021, wind wheel mounting panel 1022 separates wind wheel body 1021 along the axial of wind wheel 102 long wind wheel body 1023 and short wind wheel body 1024, the axial direction of wind wheel 102 means left right direction in fig. 2, the axial length of long wind wheel body 1023 is greater than the axial length of short wind wheel body 1024, long wind wheel body 1023 corresponds and is close to first spiral case air intake 1015 and sets up, short wind wheel body 1024 corresponds and is close to second spiral case air intake 1016 and sets up, wherein drive motor 105 can set up in short wind wheel body 1024, and drive motor 105 links to each other with wind wheel mounting panel 1022, when drive motor 105 during operation, drive motor 105 can drive wind wheel mounting panel 1022 and rotate, thereby make wind wheel 102 rotate.

Moreover, since the driving motor 105 is disposed in the volute 101, the driving motor 105 occupies a space in the volute 101, and when the driving motor 105 is disposed corresponding to the volute inlet 1014, the air inlet effect of the volute inlet 1014 is affected. Consequently this application is through setting up driving motor 105 in short wind wheel body 1024, can avoid driving motor 105 to influence the intake of first spiral case air intake 1015, can guarantee centrifugal fan 100's intake, thereby can guarantee centrifugal fan 100's working property, and simultaneously, separate long wind wheel body 1023 and short wind wheel body 1024 through wind wheel mounting panel 1022, can avoid the air current in long wind wheel body 1023 and the air current in the short wind wheel body 1024 to influence each other, can reduce the noise in centrifugal fan 100, also can promote centrifugal fan 100's work efficiency, can reduce driving motor 105 axial length, be favorable to centrifugal fan 100's dynamic balance.

In some embodiments of the present invention, the radial dimension of the first volute air inlet 1015 is greater than the radial dimension of the second volute air inlet 1016, and the arrangement can increase the air inlet amount of the first volute air inlet 1015 per unit time, so as to further ensure the air inlet amount of the centrifugal fan 100, and further improve the working performance of the centrifugal fan 100.

In some embodiments of the invention, as shown in fig. 2, short rotor body 1024 has an axial length H1 and long rotor body 1023 has an axial length H2, where H2 and H1 satisfy the relationship: H1/H2 is more than or equal to 0.5 and less than 1, wherein H1 can be set to 42mm, H2 can be set to 75mm, the axial length of long wind wheel body 1023 can be guaranteed to be larger than the axial length of short wind wheel body 1024 by the arrangement, the axial length of long wind wheel body 1023 and the axial length of short wind wheel body 1024 can be more suitable, the air intake can be better guaranteed, and the working efficiency of centrifugal fan 100 can be guaranteed.

In some embodiments of the present invention, as shown in fig. 1, centrifugal fan 100 may further include: a motor mounting plate 106 for mounting a drive motor 105, the motor mounting plate 106 disposed around the second volute inlet 1016, wherein the motor mounting plate 106 may be disposed on an inner surface of the volute 101. After the centrifugal fan 100 is assembled, the driving motor 105 is mounted on the motor mounting plate 106, so that the driving motor 105 can be reliably fixed on the motor mounting plate 106, and when the driving motor 105 works, the vibration of the driving motor 105 can be reduced, thereby further reducing the working noise of the centrifugal fan 100.

In some embodiments of the present invention, as shown in fig. 1, centrifugal fan 100 may further include: the inlet grill 107, the inlet grill 107 may be disposed at the first volute inlet 1015 and/or the second volute inlet 1016, for example: the air inlet grille 107 is disposed at the second volute air inlet 1016, so that air can smoothly flow into the volute 101 from the air inlet grille 107, vortex formation in the volute 101 can be avoided, and thus airflow noise in the volute 101 can be prevented, and the air inlet grille 107 has a filtering effect, so that foreign objects can be prevented from being sucked into the volute 101, and the working reliability of the centrifugal fan 100 can be ensured.

In some embodiments of the invention, as shown in fig. 3, the wind rotor 102 may include a plurality of blades 1025, such as: the number of the blades 1025 can be 41, the blades 1025 are arranged at intervals along the circumferential direction of the wind wheel 102, the blades 1025 can be arranged in an arc shape, the chord length of the blades 1025 is L, and the relation is satisfied: l is more than or equal to 15mm and less than or equal to 25mm, wherein the chord length of each blade 1025 can be set to be 18mm, the spacing distance between every two adjacent blades 1025 is a, and the relation is satisfied: a is more than or equal to 0.3L and less than or equal to 0.7L. Also, the thickness of the leaves 1025 is set to t, satisfying the relationship: t is 1mm < 3mm, and preferably, the thickness of the blade 1025 is set to 1.5 mm.

Meanwhile, the inlet angle of the blade 1025 is α, satisfying the relationship: α ≦ 40 ≦ α ≦ 90 °, preferably, the inlet angle of blade 1025 is 70 ° and the outlet angle of blade 1025 is θ, satisfying the relationship: theta is more than or equal to 120 degrees and less than or equal to 170 degrees, the outlet angle of the blade 1025 is 165 degrees, the inlet angle of the blade 1025 refers to the included angle between the tangent line at the intersection point of the inner end of the blade 1025 and the inner diameter of the wind wheel 102 and the tangent line at the intersection point of the inner diameter of the wind wheel 102 and the inner end of the blade 1025, and the outlet angle of the blade 1025 refers to the included angle between the tangent line at the intersection point of the outer end of the blade 1025 and the outer diameter of the wind wheel 102 and the tangent line at the intersection point of the outer diameter of the wind wheel 102 and the outer end of the blade 1025. Additionally, the setting angle of the blades 1025 may be set to 25 ° -40 °, and preferably, the setting angle of the blades 1025 is 32 °. Through the plurality of blades 1025 arranged in the above way, the flow channel between the adjacent blades 1025 can be an accelerating flow channel, the width of the flow channel is reduced from the inner end of the blade 1025 to the outer end, and after the air flow flows through the wind wheel 102, enough high-speed and high-pressure air flow can be formed to enter the air channel, so that the air channel resistance can be better overcome.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A centrifugal fan for a bladeless fan, comprising:

a volute having a volute inlet;

the wind wheel is rotatably arranged in the volute and is provided with a wind wheel outer diameter D and a wind wheel inner diameter D, wherein D and D satisfy the relation: D/D is more than or equal to 0.7 and less than or equal to 0.9;

and the driving motor is connected with the wind wheel and is used for driving the wind wheel to rotate in the volute.

2. The centrifugal fan for a bladeless air supply apparatus according to claim 1, wherein the volute inlet includes: the first volute air inlet and the second volute air inlet are respectively formed on two axial side surfaces of the volute;

the wind wheel includes: the wind wheel body is in with the setting wind wheel mounting panel in the wind wheel body, the wind wheel mounting panel will the wind wheel body is followed long wind wheel body and short wind wheel body are separated to the axial of wind wheel, the axial length of long wind wheel body is greater than the axial length of short wind wheel body, long wind wheel body corresponds and is close to first spiral case air intake, short wind wheel body corresponds and is close to second spiral case air intake, wherein driving motor sets up this internal and with the wind wheel mounting panel links to each other of short wind wheel.

3. The centrifugal fan for a bladeless air supply apparatus according to claim 2, wherein a radial dimension of the first volute air inlet is greater than a radial dimension of the second volute air inlet.

4. The centrifugal fan for a bladeless fan according to claim 2, wherein the short wind wheel body has an axial length of H1, and the long wind wheel body has an axial length of H2, wherein H2 and H1 satisfy the relation: H1/H2 is more than or equal to 0.5 and less than or equal to 1.

5. The centrifugal fan for a bladeless air supply unit according to claim 2, further comprising: and the motor mounting plate is used for mounting the driving motor and surrounds the second volute air inlet.

6. The centrifugal fan for a bladeless air supply unit according to claim 2, further comprising: and the air inlet grille is arranged at the first volute air inlet and/or the second volute air inlet.

7. The centrifugal fan for a bladeless air supply device according to claim 1, wherein the wind wheel includes a plurality of blades spaced apart in a circumferential direction of the wind wheel,

the blade is arc-shaped, the chord length of the blade is L, and the relation is satisfied: l is more than or equal to 15mm and less than or equal to 25 mm;

the spacing distance between two adjacent blades is a, and the relationship is satisfied: a is more than or equal to 0.3L and less than or equal to 0.7L.

8. The centrifugal fan for a bladeless air supply device according to claim 7, wherein the thickness of the blade is t, and the relation is satisfied: t is more than or equal to 1mm and less than or equal to 3 mm.

9. The centrifugal fan for a bladeless air supply device according to claim 7, wherein an inlet angle of the blade is α, and satisfies a relation: alpha is more than or equal to 40 degrees and less than or equal to 90 degrees.

10. The centrifugal fan for a bladeless air supply device according to claim 7, wherein an outlet angle of the blade is θ, and satisfies a relation: theta is more than or equal to 120 degrees and less than or equal to 170 degrees.