CN212868024U

CN212868024U - Volute of centrifugal fan, centrifugal fan and air treatment equipment

Info

Publication number: CN212868024U
Application number: CN202021309861.5U
Authority: CN
Inventors: 王伟戈
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-04-02
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses a centrifugal fan's spiral case, spiral case have air intake and air outlet, and the air inlet direction of air intake is mutually perpendicular with the air-out direction of air outlet, and air outlet department has first terminal surface and second terminal surface, and first terminal surface and second terminal surface set up at the air inlet direction of air intake relatively, and first terminal surface and/or second terminal surface are provided with the protruding structure in the air outlet of orientation. From this, through the protruding structure that sets up, can cushion the air-out pressure of air outlet to and can eliminate unstable sudden and small vortex, thereby reach the purpose of noise reduction.

Description

Volute of centrifugal fan, centrifugal fan and air treatment equipment

Technical Field

The utility model belongs to the technical field of the exhaust apparatus technique and specifically relates to a spiral case, centrifugal fan and air treatment device of centrifugal fan are related to.

Background

The centrifugal fan is suitable for air conditioners and other air processing equipment, because the airflow enters from the air inlet and works through the fan, the airflow direction can generate 90-degree steering, the airflow velocity close to the air inlet is low, the middle airflow velocity is high, and therefore vortex is easily generated at the end part of the inner wall surface of the volute close to the air inlet, and the vortex accumulates to certain energy and can fall off, so that the sudden and small airflow noise is generated. Aiming at the problem of uneven axial airflow of the volute, the existing solutions such as an inclined volute tongue and a stepped volute tongue are generally adopted, but the problems of complex structure, complex mold, high mold stripping difficulty and the like exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a volute of a centrifugal fan, which can buffer the air outlet pressure of the air outlet and eliminate unstable eddy current, thereby reducing noise.

The utility model also provides a centrifugal fan.

The utility model discloses an air treatment equipment is further provided.

The utility model discloses a centrifugal fan's spiral case, spiral case have air intake and air outlet, the air inlet direction of air intake with the air-out direction of air outlet is mutually perpendicular, air outlet department has first terminal surface and second terminal surface, first terminal surface with the second terminal surface is in the air inlet direction of air intake sets up relatively, first terminal surface and/or the second terminal surface is provided with the orientation convex protruding structure in the air outlet.

Therefore, the protruding structures protruding towards the air outlet are arranged on the first end face and/or the second end face, the air outlet pressure of the air outlet can be buffered, unstable eddy currents can be eliminated, and the purpose of reducing noise is achieved.

According to the utility model discloses a some embodiments, protruding structure includes the equal thickness section, first terminal surface with the biggest interval between the second terminal surface is C, the thickness of equal thickness section is H, and H satisfies the relational expression: H/C is more than or equal to 0.05 and less than or equal to 0.3.

According to the utility model discloses a some embodiments, protruding structure includes the unequal thickness section, the unequal thickness section thickness is degressive trend in the air-out direction.

According to the utility model discloses a some embodiments, the unequal thickness section orientation one side surface of air outlet be the inclined plane and with the air-out contained angle between the direction be alpha, alpha satisfies the relational expression: alpha is more than 0 degree and less than or equal to 10 degrees.

According to some embodiments of the invention, the end surface of the protruding structure facing the inside of the volute is configured as a circular arc surface or a slanted plane.

According to the utility model discloses a some embodiments, the opening of spiral case is A, the spiral case has the snail tongue, the snail tongue arrives the longitudinal distance of the central axis of air intake is B, protruding structure orientation the one end edge of spiral case with the distance of snail tongue in the air-out direction is D, protruding structure is kept away from other end edge in the spiral case arrives the transverse distance of air intake central axis is W, wherein, A, B, D, W satisfies the relational expression: W/A is more than or equal to 0.6 and less than or equal to 0.9, and D/B is more than 0 and less than or equal to 0.3.

According to some embodiments of the utility model, the first terminal surface with the second terminal surface all is provided with protruding structure and two protruding structure is different.

The utility model discloses a centrifugal fan, include: the volute of the centrifugal fan; the fan is arranged in the volute.

The fan the length of protruding structure in the air-out direction is F, the diameter of fan is C, and F and C satisfy the relational expression: F/C is more than or equal to 0.3 and less than or equal to 1.

The utility model discloses an air treatment device includes centrifugal fan.

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

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

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

fig. 2 is an angular cross-sectional view of a centrifugal fan according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a centrifugal fan according to another embodiment of the present invention;

fig. 4 is another angular cross-sectional view of a centrifugal fan according to an embodiment of the present invention.

Reference numerals:

a volute 100;

an air inlet 10;

an air outlet 20; a first end face 21; a second end face 22; the bump structures 23; an equal thickness section 231; a non-uniform thickness section 232;

a volute tongue 30;

a centrifugal fan 200; a fan 201.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A scroll casing 100 of a centrifugal fan 200 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1 and fig. 2, the volute 100 has an air inlet 10 and an air outlet 20, and an air inlet direction of the air inlet 10 is perpendicular to an air outlet direction of the air outlet 20, wherein there may be one or two air inlets 10, and if there are two air inlets 10, the two air inlets 10 are disposed opposite to each other in the air inlet direction. The air outlet 20 has a first end face 21 and a second end face 22, the first end face 21 and the second end face 22 are disposed opposite to each other in the air intake direction of the air inlet 10, and the first end face 21 and/or the second end face 22 are/is provided with a protruding structure 23 protruding toward the inside of the air outlet 20. The air outlet 20 is generally defined by four end surfaces, each two of the four end surfaces are arranged oppositely, and the two end surfaces arranged oppositely in the air inlet direction or the axial direction are a first end surface 21 and a second end surface 22 respectively.

It can be understood that, the utility model discloses a spiral case 100 can make the air inlet direction of air intake 10 different with the air-out direction of air outlet 20, can blow off from the assigned direction fast like this after fan 201 does work in spiral case 100. In addition, the first end surface 21 and the second end surface 22 may be disposed on the air outlet 20 along the air inlet direction of the air inlet 10, and the first end surface 21 and the second end surface 22 are disposed at an interval, which is just the width of the air outlet 20 in the air inlet direction. The first end face 21 and the second end face 22 arranged in this way can guide the outlet air of the air outlet 20, and the caliber size of the air outlet 20 cannot be influenced.

Furthermore, the first end surface 21 may be provided with a protruding structure 23 protruding inward toward the outlet 20, or the first end surface 21 may be provided with a protruding structure 23 protruding inward toward the outlet 20, and the first end surface 21 and the second end surface 22 may be provided with protruding structures 23 protruding inward toward the outlet 20. By arranging the convex structure 23, the airflow speed at the end of the air outlet 20 can be reduced, so that the airflow speed difference between the end of the air inlet 10 and the end of the air outlet 20 is reduced, thereby avoiding the formation of vortex in the volute 100 due to high flow speed difference, and reducing the noise generated by the volute 100 away from the fan 201.

Specifically, as shown in fig. 2, the protruding structure 23 includes an equal-thickness section 231, a thickness of the equal-thickness section 231 is H, a maximum distance between the first end surface 21 and the second end surface 22 is C, and H satisfies a relation: H/C is more than or equal to 0.05 and less than or equal to 10.3. The equal-thickness section 231 is a part of the protruding structure 23 with equal thickness, the ratio of the thickness H of the equal-thickness section 231 to the maximum distance C between the first end surface 21 and the second end surface 22 can be set to 0.05 at the minimum and 0.3 at the maximum, so that the protruding structure 23 can be ensured to effectively limit the generation of vortex, reduce noise, and avoid the protruding structure 23 from causing great influence on the air outlet flow speed and flow of the air outlet 20 due to too thick thickness.

In addition, as shown in fig. 2, the protruding structure 23 includes a non-equal-thickness section 232, and the thickness of the non-equal-thickness section 232 decreases in the air outlet direction. The unequal-thickness section 232 arranged in this way can eliminate eddy current, reduce noise and guide air outlet of the air outlet 20.

In detail, as shown in fig. 2, a side surface of the unequal-thickness section 232 facing the air outlet 20 is an inclined surface and forms an included angle α with the air outlet direction, and α satisfies the following relation: alpha is more than 0 degree and less than or equal to 10 degrees. That is to say, the minimum value of α may be set to be greater than 0 °, which is the setting mode of the equal-thickness section 231, and the maximum value of α may be set to be 10 °, which can ensure that the protruding structure 23 can effectively limit the generation of vortex, reduce noise, and avoid the protruding structure 23 from causing great influence on the air-out flow speed and flow rate of the air outlet 20 due to too thick thickness.

In more detail, as shown in fig. 2, an end surface of the convex structure 23 facing the inside of the scroll casing 100 is configured as a circular arc surface or a slanted plane surface. The end face is constructed into an arc face or an inclined plane, so that the resistance of the end face to the air outlet 20 can be reduced, in addition, the end face is arranged into the inclined plane, the processing is easy, the production cost can be reduced, the end face is arranged into the arc face, and the connection between the protruding structure 23 and the volute 100 can be firmer.

In the embodiment of the present invention, as shown in fig. 4, the opening degree of the spiral case 100 is a, the spiral case 100 has the spiral tongue 30, the longitudinal distance from the spiral tongue 30 to the central axis of the air inlet 10 is B, the distance from the one end edge of the protruding structure 23 toward the spiral case 100 to the spiral tongue 30 in the air outlet direction is D, the transverse distance from the other end edge of the protruding structure 23 far away from the spiral case 100 to the central axis of the air inlet 10 is W, wherein A, B, D, W satisfies the following relation: W/A is more than or equal to 0.6 and less than or equal to 0.9, and D/B is more than 0 and less than or equal to 0.3. That is, in designing the structure of the scroll casing 100, it is necessary that the value of W/A be between 0.6 and 0.9, the value of W/A may be equal to 0.6 and 0.9, and further, it is necessary that the value of D/B be not more than 0.3, the value of D/B may be 0.3, but the value of D/B is not 0. The volute 100 arranged in this way can eliminate vortex and reduce noise, the air outlet flow speed and the air outlet flow of the air outlet 20 of the volute 100 cannot be influenced, and the volute 100 arranged in this way is more compact in structure.

In the embodiment of the present invention, the first end surface 21 and the second end surface 22 are both provided with the protruding structures 23, and the two protruding structures 23 are different. The two protruding structures 23 are arranged, so that eddy current can be eliminated, and the noise reduction effect is better.

In another embodiment of the present invention, as shown in fig. 3, the first end surface 21 and the second end surface 22 can be provided with the protruding structure 23, and the two protruding structures 23 are the same, so that on one hand, the eddy current can be eliminated, the noise reduction effect is better, and on the other hand, the two protruding structures 23 are the same, so that the number of processing steps can be reduced, thereby reducing the production cost.

The protruding structure 23 may be integrally formed with the first end surface 21, and the protruding structure 23 may also be integrally formed with the second end surface 22. The integrally formed structure may omit the step of separately providing and fixing the protrusion structure 23, and may make the structure of the volute 100 more stable and reliable.

The utility model discloses a centrifugal fan 200, include: the fan 201 is arranged in the volute 100. The centrifugal fan 200 is a mechanical device that increases the pressure of the gas and discharges the gas by means of the input mechanical energy, and the fan 201 is disposed in the scroll casing 100, and the fan 201 includes a motor and a fan, and the motor drives the fan to rotate in the scroll casing 100. When the blower 201 is in operation, the airflow at the air inlet 10 can be sucked into the volute 100, and then the airflow is discharged from the air outlet 20 by the rotation of the fan, so as to realize the function of discharging the air of the centrifugal blower 200.

Specifically, as shown in fig. 2 and 4, the length of the protruding structure 23 in the air outlet direction is F, the diameter of the fan 201 is C, that is, the diameter of the fan is C, and F and C satisfy the relation: F/C is more than or equal to 0.3 and less than or equal to 1. It will be understood that one end of the protruding structure 23 is aligned with the end of the first end surface 21 or the second end surface 22, and the other end of the protruding structure 23 is spaced from the end of the first end surface 21 or the second end surface 22 by a distance F. In addition, the value of F/C is set to 0.3 at the minimum and 1 at the maximum, although the value of F/C may be set to any value between 0.3 and 1. The dimensional relationship thus set may allow the arrangement of the raised structures 23 to be more closely matched to the operation of the fan 201.

The utility model discloses an air treatment device, include: the centrifugal fan 200 of the above embodiment. When the air processing device with the centrifugal fan 200 runs, the noise is low, so that the use experience of a user can be improved. The air treatment equipment can be air conditioner, and can also be equipment such as humidifier.

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", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The volute of the centrifugal fan is characterized in that the volute is provided with an air inlet and an air outlet, the air outlet is provided with a first end face and a second end face, the first end face and the second end face are oppositely arranged in the air inlet direction of the air inlet, and a protruding structure protruding towards the inside of the air outlet is arranged on the first end face and/or the second end face.

2. The volute of a centrifugal fan of claim 1, wherein the raised structure comprises an equal thickness section, a maximum spacing between the first end surface and the second end surface is C, a thickness of the equal thickness section is H, and H satisfies the relationship: H/C is more than or equal to 0.05 and less than or equal to 0.3.

3. The volute of a centrifugal fan of claim 1, wherein the raised structure comprises a non-uniform thickness section having a decreasing thickness in the outlet direction.

4. The volute of the centrifugal fan as claimed in claim 3, wherein a side surface of the unequal-thickness section facing the air outlet is a slope and forms an included angle α with the air outlet direction, and α satisfies the following relation: alpha is more than 0 degree and less than or equal to 10 degrees.

5. The volute of a centrifugal fan of claim 1, wherein an end surface of the raised structure facing an interior of the volute is configured as a circular arc surface or a slanted plane surface.

6. The volute of the centrifugal fan according to claim 1, wherein the volute has an opening degree of a, the volute has a volute tongue, a longitudinal distance from the volute tongue to a central axis of the air inlet is B, a distance from one end edge of the protruding structure facing the volute tongue to the volute tongue in the air outlet direction is D, and a transverse distance from the other end edge of the protruding structure away from the volute casing to the central axis of the air inlet is W, wherein A, B, D, W satisfies the following relation: W/A is more than or equal to 0.6 and less than or equal to 0.9, and D/B is more than 0 and less than or equal to 0.3.

7. The volute of a centrifugal fan of claim 1, wherein the first end surface and the second end surface are each provided with the raised structures and the two raised structures are different.

8. A centrifugal fan, comprising:

a volute of a centrifugal fan of any of claims 1-7;

the fan is arranged in the volute.

9. The centrifugal fan as claimed in claim 8, wherein the length of the protruding structure in the air outlet direction is F, the diameter of the fan is C, and F and C satisfy the relation: F/C is more than or equal to 0.3 and less than or equal to 1.

10. An air treatment apparatus comprising a centrifugal fan according to claim 8 or 9.