Wind wheel structure of centrifugal fan for refrigerator

Abstract

The wind wheel structure of the centrifugal fan for the refrigerator comprises a wheel disc and a support ring, a plurality of wind blades distributed at equal intervals are arranged between the wheel disc and the support ring, an installation frame used for installing a stator iron core is integrally formed in the center of the wheel disc in an injection molding mode, and the wind outlet ends of the wind blades are flush with the outer side wall of the support ring. The air inlet ends of the air blades are flush with the bottom of the mounting frame, a circle of air plates with arc-shaped cross sections are arranged on the inner side wall of the support ring and located on the air blades, the inner circle diameter of the air plates is equal to the diameter of the wheel disc, and the upper end faces of the air plates are flush with the upper end face of the mounting frame. The wind plate is arranged on the support ring, the diameter of the inner ring of the wind plate is equal to the diameter of the wheel disc, so that the air inlet quantity is gathered on the wind blades, the air inlet quantity and the air outlet quantity are greatly improved, meanwhile, the upper end face of the wind plate is flush with the upper end face of the mounting frame, the thickness of the wind wheel can be reduced, and the wind wheel is more compact. Therefore, the volume of the storage space of the refrigerator can be increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal fans, and in particular relates to a wind wheel structure of a centrifugal fan for a refrigerator. Background Art

[0002] The principle of air-cooled refrigerators is to use air for refrigeration. When high-temperature air flows through the built-in evaporator, due to the high air temperature and low evaporator temperature, the two directly exchange heat, the air temperature will be reduced, and the cold air will be blown into the storage room in the refrigerator through the fan system. The air-cooled refrigerator uses this continuous circulation method to reduce the temperature in the refrigerator storage room. However, the existing air-cooled refrigerator replaces the axial flow fan with a centrifugal fan, but the thickness of the existing centrifugal fan is relatively thick, that is, the height of the wheel stator core mounting frame is lower than the height of the bracket, which will cause the thickness of the centrifugal fan to be relatively thick, so within the limited storage space of the refrigerator, it will occupy a certain volume of the refrigerator. If the thickness of the centrifugal fan is reduced to increase the storage space of the refrigerator, then according to the structure of the air inlet and outlet of the existing centrifugal fan, the air volume in and out will be small, which will greatly increase the energy consumption of the refrigerator. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and to provide a wind wheel structure of a centrifugal fan for a refrigerator, which can increase the volume of the refrigerator storage space and the inlet and outlet air volumes.

[0004] The purpose of the utility model is achieved through the following technical scheme. The wind wheel structure of the centrifugal fan for refrigerator includes a wheel disc and a bracket ring. A plurality of wind blades distributed at equal intervals are arranged between the wheel disc and the bracket ring. A mounting frame for mounting a stator core is integrally injection-molded at the center of the wheel disc. The air outlet end of the wind blade is flush with the outer side wall of the bracket ring, and the air inlet end of the wind blade is flush with the bottom of the mounting frame. The inner side wall of the bracket ring is provided with a circle of wind plates with an arc-shaped cross section. The wind plates are located on the wind blades. The inner circle diameter of the wind plates is equal to the diameter of the wheel disc, and the upper end surface of the wind plates is flush with the upper end surface of the mounting frame.

[0005] The beneficial effects of the utility model are as follows: compared with the prior art, a wind plate is arranged on the bracket ring, and the inner circle diameter of the wind plate is equal to the diameter of the wheel disc, and the air inlet end of the wind blade is flush with the bottom of the mounting frame, so that the incoming air volume is gathered on the wind blade, thereby greatly improving the inlet and outlet air volume. At the same time, by making the upper end surface of the wind plate flush with the upper end surface of the mounting frame, the thickness of the wind wheel can be reduced, thereby improving the volume of the refrigerator storage space.

[0006] Preferably, the wind collecting surface of the wheel disc in contact with the wind blade is a planar structure, the bottom of the mounting frame and the wind collecting surface of the wheel disc are formed by an arc surface transition, and the wind inlet end of the wind blade is located on the arc surface; by setting the wind collecting surface as a planar structure, the thickness of the wind wheel can be reduced while increasing the air intake volume in the cavity where the wind blade is located.

[0007] Preferably, the cross-section of the mounting frame is truncated cone-shaped, and a gap is left between the side wall of the mounting frame and the air inlet end of the wind blade to facilitate the flow of incoming air; the gap between the truncated cone-shaped mounting frame and its side wall and the air inlet end of the wind blade plays a guiding role in the air intake process, and at the same time, it is more convenient to discharge air during the rotation of the wind wheel.

[0008] Preferably, the upper end of the wind inlet end of the wind blade is provided with an arc angle; through the arrangement of the above structure, it has a guiding effect during the wind intake process, so that the air intake volume can be ensured while the thickness of the wind wheel is reduced.

[0009] Preferably, the air outlet end of the wind blade is bent to the main body of the wind blade, the angle a is 150° to 170°, and the bending part is formed by a circular arc transition; by setting the above structure, the air output of the wind wheel can be greatly improved.

[0010] Preferably, the lower end surface of the wind plate and the inner wall of the bracket ring are transitionally formed by an arc-shaped ring; in this way, during the operation of the wind wheel, the wind energy can smoothly transition from the wind plate to the wind blades, thereby greatly reducing the vibration of the wind wheel operation and further controlling the noise.

[0011] Preferably, the upper end surface of the wind plate is flush with the upper end surface of the wind blade; through the arrangement of the above structure, the height of the wind blade is maximized, the air intake is ensured, and the thickness of the wind wheel is reduced. At the same time, the wind entering through the wind plate can be completely sucked into the cavity of the wind blade, which can increase the air intake of the wind wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a front three-dimensional structural schematic diagram of the wind wheel structure of the centrifugal fan for refrigerator.

[0013] Figure 2 The utility model is a schematic diagram of the reverse three-dimensional structure of the wind wheel structure of the centrifugal fan for refrigerators.

[0014] Figure 3 The utility model is a schematic diagram of the main structure of the wind wheel structure of the centrifugal fan for refrigerators.

[0015] The numbers in the accompanying drawings are: 1, wheel; 2, bracket ring; 3, wind blade; 4, mounting frame; 5, wind plate; 6, wind gathering surface; 7, arc surface; 8, arc ring; 31, air outlet; 32, air inlet; 33, arc angle; 34, arc surface. DETAILED DESCRIPTION

[0016] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figures 1 to 3 As shown, the utility model includes a wheel disc 1 and a bracket ring 2, a plurality of wind blades 3 are arranged between the wheel disc 1 and the bracket ring 2 with equal intervals, a mounting frame 4 for mounting the stator core is integrally injection-molded at the center of the wheel disc 1, an air outlet end 31 of the wind blade 3 is flush with the outer side wall of the bracket ring 2, an air inlet end 32 of the wind blade 3 is flush with the bottom of the mounting frame 4, an inner side wall of the bracket ring 2 is provided with a circle of wind plates 5 with an arc-shaped cross section, the wind plates 5 are located on the wind blades 3, and the setting of the wind plates 5 makes the air intake effect better, and at the same time, during the air outlet process, the wind will not go out from the upper end of the air outlet end 31 of the wind blade 3, because the setting of the wind plates 5 blocks the air outlet of the axial edge, so that the air outlet efficiency is higher; the inner circle diameter of the wind plate 5 is equal to the diameter of the wheel disc 1, and the upper end surface of the wind plate 5 is flush with the upper end surface of the mounting frame 4. The wind blades 3 are of arc-shaped structure, an odd number of wind blades are arranged, and are evenly spaced and distributed around the center of the wheel disc 1, so as to facilitate air intake and air outlet.

[0017] The wind gathering surface 6 of the wheel 1 in contact with the wind blade 3 is a planar structure, and the wind gathering surface 6 is parallel to the upper end surface of the mounting frame 4. By setting the wind gathering surface 6 of the planar structure, the volume of the wind gathering cavity where the wind blade inlet end is located is larger, and the wind gathering amount is better; the bottom of the mounting frame 4 and the wind gathering surface 6 of the wheel 1 are transitionally formed by the arc surface 7. The setting of the arc surface makes the guidance of the link from wind intake to wind gathering better, so that the vibration of the wind wheel operation can be greatly reduced, and the noise can be further controlled; and the wind inlet end 32 of the wind blade 3 is located on the arc surface 7. The cross section of the mounting frame 4 is a truncated cone, and a gap is left between the side wall of the mounting frame 4 and the wind inlet end 32 of the wind blade 3 to facilitate the flow of incoming air. The gap is wide at the top and narrow at the bottom when viewed from the wind wheel inlet, which is more conducive to wind intake and gathering.

[0018] The upper end of the air inlet end 32 of the wind blade 3 is provided with an arc corner 33 .

[0019] The outlet end 31 of the wind blade 3 is bent to the main body of the wind blade 3 , with an included angle a of 150° to 170°, and the bending portion is transitionally formed by an arc surface 34 .

[0020] The lower end surface of the wind plate 5 and the inner side wall of the bracket ring 2 are transitionally formed by an arc ring 8. The bracket ring 2 is a hollow groove body, and a plurality of reinforcing ribs are arranged inside the bracket ring 2, so that the weight of the entire wind wheel is lighter, and the strength of the bracket ring 2 is better by setting the reinforcing ribs.

[0021] The upper end surface of the wind plate 5 is flush with the upper end surface of the wind blade 3 .

[0022] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A wind wheel structure of a centrifugal fan for a refrigerator, comprising a wheel disc (1) and a support ring (2), characterized in that: A plurality of wind blades (3) are arranged between the wheel disc (1) and the support ring (2) at equal intervals. A mounting frame (4) for mounting a stator core is integrally formed by injection molding at the center of the wheel disc (1). An air outlet end (31) of the wind blade (3) is flush with an outer side wall of the support ring (2). An air inlet end (32) of the wind blade (3) is flush with a bottom of the mounting frame (4). An inner side wall of the support ring (2) is provided with a circle of wind plates (5) having an arc-shaped cross section. The wind plates (5) are located on the wind blades (3). The inner circle diameter of the wind plates (5) is equal to the diameter of the wheel disc (1), and the upper end surface of the wind plates (5) is flush with the upper end surface of the mounting frame (4).

2. The wind wheel structure of the centrifugal fan for refrigerator according to claim 1, characterized in that: The wind gathering surface (6) of the wheel disc (1) in contact with the wind blade (3) is a planar structure, the bottom of the mounting frame (4) and the wind gathering surface (6) of the wheel disc (1) are transitionally formed via a curved surface (7), and the wind inlet end (32) of the wind blade (3) is located on the curved surface (7).

3. The wind wheel structure of the centrifugal fan for refrigerator according to claim 2, characterized in that: The cross section of the mounting frame (4) is in the shape of a truncated cone, and a gap is left between the side wall of the mounting frame (4) and the air inlet end (32) of the wind blade (3) to facilitate the flow of incoming air.

4. The wind wheel structure of the centrifugal fan for refrigerator according to claim 1, characterized in that: The upper end of the air inlet end (32) of the wind blade (3) is provided with an arc corner (33).

5. The wind wheel structure of the centrifugal fan for refrigerator according to claim 1, characterized in that: The air outlet end (31) of the wind blade (3) and the main body of the wind blade (3) are distributed in a bent shape, with an included angle a of 150° to 170°, and the bending portion is transitionally formed through an arc surface (34).

6. The wind wheel structure of the centrifugal fan for refrigerator according to claim 1, characterized in that: The lower end surface of the wind plate (5) and the inner side wall of the support ring (2) are transitionally formed via an arc-shaped ring (8).

7. The wind wheel structure of the centrifugal fan for refrigerator according to claim 1, characterized in that: The upper end surface of the wind plate (5) is flush with the upper end surface of the wind blade (3).

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