Centrifugal fan, air conditioner and automobile

Abstract

The utility model belongs to the technical field of air conditioners, and discloses a centrifugal fan, an air conditioner and an automobile, the centrifugal fan comprises a volute, an impeller and a turbulent flow assembly, the volute is provided with an air inlet and an air outlet, the impeller comprises a hub and a plurality of blades, the hub is rotatably arranged in the volute, one end of each blade is connected with the hub, and the blades are distributed at intervals in the circumferential direction of the hub. The hub and the multiple blades are matched to form an air cavity, the side, away from the hub, of the air cavity is an air inlet part, a gap between every two adjacent blades is an air outlet part, airflow can sequentially flow through the air inlet, the air inlet part, the air cavity, the air outlet part and the air outlet, the spoiler assembly comprises a fixing piece and a spoiler, the fixing piece is fixed in the volute, the spoiler is connected with the fixing piece, and the spoiler is connected with the fixing piece. The spoiler is arranged in the air cavity, the spoiler located in the air cavity can scatter eddy current formed by opposite flushing of the backflow air flow and the inlet air flow, and then the problem that noise is generated in the air cavity is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field especially relates to a centrifugal fan, air conditioner and car. BACKGROUND

[0002] The centrifugal fan has the characteristics of small volume and high total pressure, and is therefore widely used in air conditioners, especially in fresh air assemblies with high wind resistance.

[0003] The centrifugal fan has the characteristics of axial air inlet and radial air outlet. In actual application, a small part of the air flow at the air outlet position flows back, and this part of the air flow flows back from the outer periphery of the impeller to the center of the impeller and collides with the air inlet flow at the center of the impeller to form a vortex, thus generating noise at the center of the impeller.

[0004] Therefore, there is an urgent need to provide a centrifugal fan, an air conditioner and a car to solve the above technical problems. INVENTION CONTENTS

[0005] The first object of the utility model is to provide a centrifugal fan with less noise.

[0006] To achieve this object, the utility model adopts the following technical solutions:

[0007] The centrifugal fan comprises:

[0008] A volute is provided with an air inlet and an air outlet.

[0009] An impeller comprises a hub and a plurality of blades. The hub is rotationally arranged in the volute. One end of the blade is connected to the hub. The plurality of blades are distributed along the circumference of the hub. The hub and the plurality of blades cooperate to form an air chamber. The side of the air chamber away from the hub is an air inlet portion. The gap between the adjacent two blades is an air outlet portion. The air flow can flow through the air inlet, the air inlet portion, the air chamber, the air outlet portion and the air outlet in sequence.

[0010] A spoiler assembly comprises a fixing member and a spoiler plate. The fixing member is fixed in the volute. The spoiler plate is connected to the fixing member and arranged in the air chamber.

[0011] Optionally, the number of spoiler plates is multiple. The multiple spoiler plates are distributed along the circumference of the hub.

[0012] Optionally, the surface of the spoiler plate is parallel to the radial direction of the air chamber.

[0013] Optionally, the spoiler plate is arranged at a distance from the side of the blade facing the air chamber. The spoiler plate is arranged at a distance from the hub.

[0014] Optionally, the distance between the spoiler plate and the side of the blade facing the air chamber is a, and a is greater than 15 mm.

[0015] And / or, the distance between the spoiler and the hub is b, and b is greater than 3mm.

[0016] Optionally, the fixing member is a ring structure, and the fixing member is located outside the air cavity and at the air inlet portion.

[0017] Optionally, the spoiler assembly further comprises a connecting member, and the spoiler is connected to the fixing member through the connecting member.

[0018] Optionally, the connecting member comprises a first connecting portion and two second connecting portions, two ends of the first connecting portion are connected to corresponding one of the second connecting portions respectively, one end of each of the second connecting portions away from the first connecting portion is connected to the fixing member, the distance between the two second connecting portions gradually decreases in the direction of the fixing member towards the first connecting portion, and the spoiler is connected to the first connecting portion.

[0019] The second object of the present application is to provide an air conditioner, which has a centrifugal fan with low noise.

[0020] To achieve the above object, the present application adopts the following technical scheme.

[0021] The air conditioner comprises the centrifugal fan.

[0022] The third object of the present application is to provide an automobile, which has an air conditioner with low noise.

[0023] To achieve the above object, the present application adopts the following technical scheme.

[0024] The automobile comprises the air conditioner.

[0025] The present application has the following advantages.

[0026] The centrifugal fan provided by the present application is provided with a spoiler assembly, wherein the fixing member is fixed in the volute, the spoiler is connected to the fixing member, and the spoiler is arranged in the air cavity of the impeller. When part of the air flow at the outer periphery of the impeller flows back to the air cavity through the air outlet portion (hereinafter referred to as backflow air flow), the spoiler in the air cavity can disperse the vortex formed by the backflow air flow and the air inlet air flow, thereby solving the problem of noise generated in the air cavity. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the centrifugal fan provided by the present application;

[0028] Figure 2 is Figure 1 A-A sectional view in the

[0029] Figure 3 is a structural schematic view of the spoiler assembly provided by the present application;

[0030] Figure 4 is a first assembly structure schematic view of the spoiler assembly and the impeller provided by the utility model;

[0031] Figure 5 is Figure 4 B-B section view in the

[0032] Figure 6 is a second assembly structure schematic view of the spoiler assembly and the impeller provided by the utility model.

[0033] In the figure:

[0034] 100, volute; 110, first shell; 120, second shell; 130, third shell; 200, impeller; 210, hub; 220, blade; 230, air cavity; 231, air inlet part; 232, air outlet part; 240, fixed ring; 300, spoiler assembly; 310, fixing piece; 311, fixed part; 320, spoiler plate; 330, connecting piece; 331, first connecting part; 332, second connecting part. DETAILED DESCRIPTION

[0035] The utility model will be further explained in detail below by combining with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0036] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] This embodiment provides a centrifugal fan with low noise.

[0040] Specifically, such as Figures 1 to 6 As shown, the centrifugal fan includes a volute 100, an impeller 200, and a turbulence assembly 300. The volute 100 has an air inlet and an air outlet (not shown in the figure). The impeller 200 includes a hub 210, a retaining ring 240, and multiple blades 220. For example, the number of blades 220 can be twenty, twenty-five, or thirty. The hub 210 is rotatably mounted within the volute 100. One end of each blade 220 is connected to the hub 210, and the other end is connected to the retaining ring 240. The multiple blades 220 are arranged circumferentially around the hub 210. The hub 210 and multiple blades 220 are spaced apart and evenly distributed, and cooperate to form a wind cavity 230. The side of the wind cavity 230 away from the hub 210 is the air inlet 231, and the gap between two adjacent blades 220 is the air outlet 232. The airflow can flow through the air inlet, air inlet 231, wind cavity 230, air outlet 232 and air outlet in sequence. The turbulence assembly 300 includes a fixing member 310 and a turbulence plate 320. The fixing member 310 is fixed in the volute 100, and the turbulence plate 320 is connected to the fixing member 310 and is disposed in the wind cavity 230.

[0041] The centrifugal fan provided in this embodiment is equipped with a turbulence assembly 300. The fixing member 310 is fixed inside the volute 100, and the turbulence plate 320 is connected to the fixing member 310. The turbulence plate 320 is disposed in the air cavity 230 of the impeller 200. When part of the airflow from the outer periphery of the impeller 200 flows back into the air cavity 230 through the air outlet 232 (hereinafter referred to as the return airflow), the turbulence plate 320 located in the air cavity 230 can disperse the vortex formed by the collision of the return airflow and the inlet airflow, thereby solving the problem of noise generated in the air cavity 230.

[0042] Optionally, the number of spoilers 320 is multiple, for example, the number of spoilers 320 can be eight, ten or fifteen, etc. The multiple spoilers 320 are distributed along the circumference of the hub 210, i.e. the multiple spoilers 320 are distributed along the circumference of the wind cavity 230. The spoiler 320 capable of dispersing vortex is arranged at multiple positions along the circumference of the wind cavity 230, so as to further reduce the probability of noise problem in the wind cavity 230.

[0043] Further, the multiple spoilers 320 are uniformly distributed along the circumference of the hub 210, so as to improve the effect of the spoiler assembly 300 dispersing vortex in the wind cavity 230.

[0044] Optionally, the fixing member 310 is annular structure, and the fixing member 310 is located outside the wind cavity 230 and at the air inlet part 231, so as to reduce the wind resistance in the wind cavity 230 and simplify the structure. It should be noted that, since the multiple spoilers 320 are uniformly distributed along the circumference of the hub 210, and the multiple spoilers 320 are connected with the fixing member 310, the annular fixing member 310 is coaxially arranged with the hub 210. Of course, in other embodiments, the fixing member 310 can also be a sheet structure located outside the wind cavity 230 and at the air inlet part 231, and at this time, the fixing member 310 needs to be provided with a ventilation hole so that the airflow enters the wind cavity 230; or the fixing member 310 can also be an annular structure surrounding the outer circumference of the blade 220, one end of the spoiler 320 is connected with the fixing member 310, and the other end penetrates the air outlet part 232 into the wind cavity 230.

[0045] Optionally, the spoiler assembly 300 further comprises a connecting member 330, one end of the connecting member 330 is connected with the fixing member 310, and the other end is connected with the spoiler 320, so as to realize the connection between the spoiler 320 and the fixing member 310. Further, the number of the connecting member 330 and the spoiler 320 is equal and one-to-one corresponding.

[0046] Further, the connecting piece 330 comprises a first connecting part 331 and two second connecting parts 332, the spoiler plate 320 is connected with the first connecting part 331, two ends of the first connecting part 331 are connected with corresponding one of the second connecting parts 332 respectively, one end of each of the two second connecting parts 332 away from the first connecting part 331 is connected with the fixing piece 310, the spacing between the two second connecting parts 332 gradually decreases along the direction of the fixing piece 310 towards the first connecting part 331, so that the fixing piece 310, the first connecting part 331 and the two second connecting parts 332 enclose a connecting structure similar to a trapezoid, which can improve the structural strength of the connecting piece 330, and further improve the reliability and stability of the connection between the spoiler plate 320 and the fixing piece 310. Secondly, this structural design can also improve the manufacturability of the spoiler assembly 300. Thirdly, this structural design can reduce the weight of the connecting piece 330, and further achieve the effect of reducing the weight of the spoiler assembly 300 and the centrifugal fan.

[0047] Optionally, each of the two second connecting parts 332 is connected with the inner wall of the annular fixing piece 310, and the direction of the fixing piece 310 towards the first connecting part 331 is the radial direction of the annular fixing piece 310. This structural design can avoid the connecting piece 330 extending into the wind cavity 230 to increase the wind resistance in the wind cavity 230, and also can reduce the volume of the spoiler assembly 300.

[0048] Optionally, the surface of the spoiler plate 320 is parallel to the radial direction of the wind cavity 230. This structural design can reduce the wind resistance of the airflow entering the wind cavity 230 and the wind resistance of the airflow exiting the wind cavity 230.

[0049] Optionally, the spoiler plate 320 is spaced apart from the side of the blade 220 facing the wind cavity 230, and the spoiler plate 320 is spaced apart from the hub 210, so as to avoid the spoiler plate 320 from scratching the blade 220 and the hub 210, and also to ensure the normal flow of the airflow in the wind cavity 230.

[0050] Further, the spacing between the spoiler plate 320 and the side of the blade 220 facing the wind cavity 230 is a, and a is greater than 15 mm. For example, a can be 15 mm, 16.5 mm or 17 mm, etc. On the one hand, it ensures that the spoiler plate 320 will not scratch the blade 220, and on the other hand, it reduces the influence of the spoiler plate 320 on the air output of the impeller 200, so as to ensure that the impeller 200 has sufficient air output.

[0051] Further, the spacing between the spoiler plate 320 and the hub 210 is b, and b is greater than 3 mm. For example, b can be 3 mm, 5 mm or 6 mm, etc., so as to ensure that the spoiler plate 320 will not scratch the hub 210.

[0052] Optionally, the volute 100 comprises a first shell 110, a second shell 120 and a third shell 130, one side of the second shell 120 is connected with the first shell 110 through snap-fit connection, and the other side of the second shell 120 is connected with the third shell 130, so that an airflow cavity is formed inside the volute 100, the impeller 200 is arranged in the airflow cavity in rotation, the air inlet is arranged on the first shell 110 or the second shell 120, and the air outlet is arranged on the third shell 130.

[0053] Further, the fixing member 310 is provided with fixing portions 311, bolts (not shown in the figure) are arranged in the fixing portions 311 and connected with the second shell 120, so as to realize the connection between the fixing member 310 and the volute 100.

[0054] Further, the number of the fixing portions 311 and the bolts is multiple and one-to-one, the multiple fixing portions 311 are uniformly distributed along the circumference of the fixing member 310, so as to improve the reliability and stability of the connection between the fixing member 310 and the volute 100. For example, the number of the fixing portions 311 can be two, three or four, etc., which is determined according to the volume or weight of the fixing member 310 and the spoiler 320.

[0055] The embodiment further provides an air conditioner comprising the centrifugal fan, so that the centrifugal fan of the air conditioner has smaller noise and can provide a quieter and more comfortable environment for users.

[0056] The embodiment further provides an automobile comprising the air conditioner, so that the air conditioner of the automobile has smaller noise and can provide a quieter and more comfortable cabin environment for users.

[0057] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A centrifugal fan, characterized in that, include: A volute (100) is provided with an air inlet and an air outlet; An impeller (200) includes a hub (210) and multiple blades (220). The hub (210) is rotatably disposed within the volute (100). One end of each blade (220) is connected to the hub (210). The multiple blades (220) are distributed circumferentially around the hub (210). The hub (210) and the multiple blades (220) cooperate to form a wind cavity (230). The side of the wind cavity (230) facing away from the hub (210) is the air inlet (231). The gap between two adjacent blades (220) is the air outlet (232). The airflow can flow sequentially through the air inlet, the air inlet (231), the wind cavity (230), the air outlet (232), and the air outlet. A spoiler assembly (300) includes a fixing member (310) and a spoiler plate (320). The fixing member (310) is fixed inside the volute (100), and the spoiler plate (320) is connected to the fixing member (310) and disposed inside the air cavity (230).

2. The centrifugal fan according to claim 1, characterized in that, The number of spoilers (320) is multiple, and the multiple spoilers (320) are distributed at circumferential intervals along the hub (210).

3. The centrifugal fan according to claim 1, characterized in that, The surface of the spoiler (320) is parallel to the radial direction of the air cavity (230).

4. The centrifugal fan according to claim 1, characterized in that, The spoiler (320) and the blade (220) are spaced apart on the side facing the air cavity (230), and the spoiler (320) and the hub (210) are spaced apart.

5. The centrifugal fan according to claim 1, characterized in that, The distance between the spoiler (320) and the blade (220) on the side facing the air cavity (230) is a, where a is greater than 15mm; And / or, the distance between the spoiler (320) and the hub (210) is b, where b is greater than 3 mm.

6. The centrifugal fan according to claim 1, characterized in that, The fixing member (310) has a ring structure and is located outside the air cavity (230) and on the side of the air inlet (231).

7. The centrifugal fan according to any one of claims 1-6, characterized in that, The spoiler assembly (300) further includes a connector (330), through which the spoiler plate (320) is connected to the fixing member (310).

8. The centrifugal fan according to claim 7, characterized in that, The connector (330) includes a first connecting part (331) and two second connecting parts (332). The two ends of the first connecting part (331) are respectively connected to a corresponding second connecting part (332). The ends of the two second connecting parts (332) away from the first connecting part (331) are connected to the fixing part (310). Along the direction of the fixing part (310) toward the first connecting part (331), the distance between the two second connecting parts (332) gradually decreases. The spoiler (320) is connected to the first connecting part (331).

9. An air conditioner, characterized in that, Including the centrifugal fan as described in any one of claims 1-8.

10. An automobile, characterized in that, Including the air conditioner as described in claim 9.

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