Alternating current centrifugal fan

Abstract

The utility model relates to an alternating current centrifugal fan which comprises a fan support, at least three radial supporting frames are arranged on the fan support, an alternating current motor is installed in the center of the fan support, and an installation frame used for installing a circuit board and a lead frame used for installing a power line are arranged on the fan support. The mounting side openings of the mounting frame and the lead frame are on the same side with the alternating current motor on which the fan bracket is positioned; the capacitor and the resistor on the circuit board are located on the two sides of the circuit board and distributed on the same plane, the capacitor and the resistor are located on the side edge of the installation frame, the lead frame is arranged between the installation frame and a frame of the fan support, and the power line is connected to the circuit board installed in the installation frame through the lead frame. According to the centrifugal fan, the whole centrifugal fan is simpler in structure and more reasonable in arrangement, the axial height of the whole centrifugal fan can be greatly reduced, and therefore the structural size is more compact.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal fans for refrigerators, and in particular relates to an AC centrifugal fan. 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 of 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 refrigerators have replaced the axial flow fans with centrifugal fans. The centrifugal fans currently used are all direct current, that is, DC motors. Because the voltage input to the refrigerator is all AC voltage, when the input AC voltage flows into the DC motor of the centrifugal fan, it needs to be converted into DC voltage through a power converter to make the DC motor work. During this period, complex power converters and main control boards are required, which not only makes the structure of the centrifugal fan more complicated, but also makes the DC motor easily damaged after long-term operation and cannot withstand high-load operation and high energy consumption. Therefore, it is necessary to develop a centrifugal fan using an AC motor, and the rational arrangement of the capacitors and resistors on the electric control circuit board used by the AC motor on the fan bracket will affect the structural volume change of the entire centrifugal fan. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide an AC centrifugal fan with a simple structure and reasonable arrangement.

[0004] The purpose of the utility model is achieved through the following technical scheme. The AC centrifugal fan comprises a fan bracket, at least three radial support frames are provided on the fan bracket, an AC motor is installed at the center of the fan bracket, a mounting frame for mounting a circuit board and a lead frame for mounting a power line are provided on the fan bracket, and the mounting side openings of the mounting frame and the lead frame are both on the same side as the AC motor where the fan bracket is located; the capacitors and resistors on the circuit board are both located on both sides of the circuit board and are distributed in the same plane, and the capacitors and resistors are both located at the sides of the mounting frame, the lead frame is arranged between the mounting frame and the frame of the fan bracket, and the power line is connected to the circuit board installed in the mounting frame through the lead frame.

[0005] The beneficial effects of the utility model are as follows: compared with the prior art, by arranging a mounting frame on the bracket, during the high-speed rotation of the centrifugal fan, the circuit board is fixed by the mounting frame without vibration, the noise caused by the vibration is eliminated, and the assembly is more convenient; and by arranging a lead frame, the arrangement and direction of the power line are more reasonable and clear; at the same time, the plane arrangement of the capacitors and resistors on the circuit board and the rational distribution and placement between the capacitors and the mounting frame make the structure of the entire centrifugal fan simpler, the arrangement is more reasonable, and the axial height of the entire centrifugal fan can be greatly reduced, thereby making the structural volume more compact.

[0006] Preferably, both sides of the mounting frame are integrally injection molded on the two adjacent radial support frames, the front end of the mounting frame is integrally injection molded on the central side of the fan bracket, one side of the lead frame is integrally injection molded on the rear end side of the mounting frame, and the other side of the lead frame is integrally injection molded on the frame of the fan bracket; through the arrangement of the above structure, the entire mounting frame is integrally connected and fixed to the two radial support frames and the center of the fan bracket, and the stability and compactness of the structure are better. At the same time, the above arrangement of the lead frame makes the stability and compactness of the lead frame better, and the lead distance between the lead frame and the mounting frame is minimized, and the lead arrangement structure is more reasonable.

[0007] Preferably, both sides of the mounting frame are provided with a mounting frame for mounting the capacitor or the resistor, and the mounting frame is integrally injection molded on the radial support frame; through the arrangement of the above structure, the mounting frames are arranged along the radial direction of the fan bracket, so that the capacitor or resistor on the circuit board is also arranged along the radial direction of the fan bracket, so that the axial height of the entire centrifugal fan can be greatly reduced, thereby making the structural volume more compact.

[0008] Preferably, a shelf frame for placing the capacitor or the resistor is further provided on the rear end side of the mounting frame, and the shelf frame is located on one side of the lead frame; this allows the capacitor or resistor on the circuit board to be arranged more reasonably, thereby making the structural volume of the entire centrifugal fan more compact.

[0009] Preferably, at least two limit columns for limiting the displacement of the circuit board are provided on the main body of the mounting frame, and the limit columns are located at the rear end of the mounting frame, and the front and rear end sides of the main body of the mounting frame are also provided with resting blocks for placing the circuit board, and two limit blocks for preventing the circuit board from vibrating are provided on the front end side of the mounting frame; through the arrangement of the above-mentioned structure, the circuit board installed in the mounting frame will not vibrate during the high-speed operation of the centrifugal fan, the noise caused by the vibration is eliminated, and the stability after assembly is also better.

[0010] Preferably, two outlet grooves are provided on the front side of the mounting frame, and the outlet grooves are located on the AC motor side; two inlet grooves are provided on the rear side of the mounting frame, and the inlet grooves are located on the lead frame side; this not only ensures the direction of the power cord, but also through the design of double wire grooves, the direction of the power cords connected in different directions on the circuit board is clearer, maintenance is more convenient, and the power cord will not interfere with the centrifugal fan due to its high-speed rotation.

[0011] Preferably, at least two wire clips are provided on the lead frame, and the wire clips are distributed in a staggered and relative manner along the length direction of the lead frame, and a lead groove is provided on the frame of the fan bracket; so that the direction of the power cord is straightened and not messy, and the power cord will not interfere with the centrifugal fan due to the high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the fan bracket structure of the AC centrifugal fan of the utility model.

[0013] Figure 2 The utility model is a schematic diagram of the structure of a fan bracket equipped with a circuit board.

[0014] The numbers in the accompanying drawings are: 1. fan bracket; 2. radial support frame; 3. AC motor; 4. circuit board; 5. mounting frame; 6. lead frame; 11. lead slot; 41. capacitor; 42. resistor; 51. shelf frame; 52. limit column; 53. shelf block; 54. limit block; 55. outlet slot; 56. incoming slot; 61. line card. DETAILED DESCRIPTION

[0015] The utility model will be described in detail below in conjunction with the accompanying drawings: Figure 1 , 2 As shown, the utility model includes a fan bracket 1, on which at least three radial support frames 2 are provided, an AC motor 3 is installed in the center of the fan bracket 1, and a mounting frame 5 for mounting a circuit board 4 and a lead frame 6 for mounting a power line are provided on the fan bracket 1, and the mounting side openings of the mounting frame 5 and the lead frame 6 are both on the same side as the AC motor 3 where the fan bracket 1 is located; the capacitor 41 and the resistor 42 on the circuit board 4 are both located on both sides of the circuit board 4 and are distributed in the same plane, and the capacitor 41 and the resistor 42 are both located at the side of the mounting frame 5, the lead frame 6 is arranged between the mounting frame 5 and the frame of the fan bracket 1, and the power line is connected to the circuit board 4 installed in the mounting frame 5 through the lead frame 6.

[0016] Both sides of the mounting frame 5 are integrally injection molded on two adjacent radial support frames 2, the front end of the mounting frame 5 is integrally injection molded on the central side of the fan bracket 1, one side of the lead frame 6 is integrally injection molded on the rear end side of the mounting frame 5, and the other side of the lead frame 6 is integrally injection molded on the frame of the fan bracket 1.

[0017] Both sides of the mounting frame 5 are provided with a placing frame 51 for placing the capacitor 41 or the resistor 42 , and the placing frame 51 is integrally injection-molded on the radial support frame 2 .

[0018] A placing frame 51 for placing the capacitor 41 or the resistor 42 is also provided on the rear end side of the mounting frame 5 , and the placing frame 51 is located on one side of the lead frame 6 .

[0019] At least two limiting columns 52 for limiting the displacement of the circuit board 4 are provided on the main body of the mounting frame 5, and the limiting columns 52 are located at the rear end of the mounting frame 5. The front and rear end sides of the main body of the mounting frame 5 are also provided with supporting blocks 53 for supporting the circuit board 4, and two limiting blocks 54 for preventing the circuit board 4 from vibrating are provided in the front end side of the mounting frame 5.

[0020] Two wire outlet grooves 55 are provided on the front side of the mounting frame 5 , and the wire outlet grooves 55 are located on the side of the AC motor 3 . Two wire inlet grooves 56 are provided on the rear side of the mounting frame 5 , and the wire inlet grooves 56 are located on the side of the lead frame 6 .

[0021] At least two wire clips 61 are disposed on the lead frame 6 , and the wire clips 61 are distributed in a staggered and opposite manner in sequence along the length direction of the lead frame 6 , and a lead groove 11 is disposed on the frame of the fan bracket 1 .

[0022] The installation process of the utility model is as follows: first, the capacitor 41 or the resistor 42 is soldered and fixed on the side of the circuit board 4, then, the power line is connected to the circuit board 4 and the AC motor 3, and finally, the circuit board 4 is placed and fixed in the installation frame 5, and the power line is clamped on the line clamp 61 of the lead frame 6, and the power line is led out to the outside of the fan bracket 1 through the lead groove 11.

[0023] 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. An AC centrifugal fan, comprising a fan support (1), wherein the fan support (1) is provided with at least three radial support frames (2), characterized in that: An AC motor (3) is installed at the center of the fan bracket (1); a mounting frame (5) for mounting a circuit board (4) and a lead frame (6) for mounting a power line are provided on the fan bracket (1); and mounting side openings of the mounting frame (5) and the lead frame (6) are both on the same side as the AC motor (3) where the fan bracket (1) is located; the capacitor (41) and the resistor (42) on the circuit board (4) are both located on both sides of the circuit board (4) and are distributed in the same plane, and the capacitor (41) and the resistor (42) are both located at the side of the mounting frame (5); the lead frame (6) is arranged between the mounting frame (5) and the frame of the fan bracket (1); and the power line is connected to the circuit board (4) installed in the mounting frame (5) through the lead frame (6).

2. The AC centrifugal fan according to claim 1, characterized in that: The two sides of the mounting frame (5) are respectively integrally injection-molded on the two adjacent radial support frames (2), the front end of the mounting frame (5) is integrally injection-molded on the central side of the fan bracket (1), one side of the lead frame (6) is integrally injection-molded on the rear end side of the mounting frame (5), and the other side of the lead frame (6) is integrally injection-molded on the frame of the fan bracket (1).

3. The AC centrifugal fan according to claim 2, characterized in that: Both sides of the installation frame (5) are provided with a placement frame (51) for placing the capacitor (41) or the resistor (42), and the placement frame (51) is integrally injection-molded on the radial support frame (2).

4. The AC centrifugal fan according to claim 2, characterized in that: A holding frame (51) for holding the capacitor (41) or the resistor (42) is also provided on the rear end side of the mounting frame (5), and the holding frame (51) is located on one side of the lead frame (6).

5. The AC centrifugal fan according to claim 1, characterized in that: At least two limiting columns (52) for limiting the displacement of the circuit board (4) are provided on the main body of the installation frame (5), and the limiting columns (52) are located at the rear end of the installation frame (5). The main body of the installation frame (5) is also provided with a resting block (53) for resting the circuit board (4) on the front and rear ends of the main body, and two limiting blocks (54) for preventing the circuit board (4) from vibrating are provided in the front end side of the installation frame (5).

6. The AC centrifugal fan according to claim 1, characterized in that: Two wire outlet grooves (55) are provided on the front side of the mounting frame (5), and the wire outlet grooves (55) are located on the side of the AC motor (3). Two wire inlet grooves (56) are provided on the rear side of the mounting frame (5), and the wire inlet grooves (56) are located on the side of the lead frame (6).

7. The AC centrifugal fan according to claim 2, characterized in that: At least two wire clips (61) are provided on the lead frame (6), and the wire clips (61) are arranged in a staggered and relatively sequential manner along the length direction of the lead frame (6), and a lead slot (11) is provided on the frame of the fan bracket (1).

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