IGBT heat radiation structure of frequency converter

Abstract

The utility model belongs to the technical field of frequency converters, and especially relates to a frequency converter IGBT heat radiation structure comprising a frequency converter main body, the bottom of the frequency converter main body is provided with a heat radiation plate, and the heat radiation plate is internally provided with a water cooling mechanism; function boxes are fixedly installed on the two sides of the heat dissipation plate, motors are fixedly installed on the inner walls of the front sides of the function boxes, reciprocating mechanisms are arranged between the motors and the function boxes, and heat dissipation mechanisms are arranged below the function boxes. According to the utility model, the design is reasonable, through the arrangement of the water cooling mechanism, the purpose of diffusing the heat absorbed by the heat dissipation plate to the outside through the heat dissipation sheets can be realized, and the purpose of conducting the temperature and dissipating the heat of the frequency converter main body can be further realized; the purpose that heat on the cooling fins can be rapidly diffused can be achieved, reciprocating air blowing can be conducted on the cooling fins through the radiator, the heat dissipation speed can be increased, and the heat dissipation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to an IGBT heat dissipation structure of a frequency converter. Background Art

[0002] IGBT, or insulated gate bipolar transistor, is a composite fully controlled voltage-driven power semiconductor device composed of a bipolar transistor BJT and an insulated gate field effect transistor MOS. It has the advantages of both MOSFET's high input impedance and GTR's low on-state voltage drop. GTR has a low saturation voltage drop and a large current density, but a large drive current; MOSFET has a very low drive power and a fast switching speed, but a large on-state voltage drop and a low current density. IGBT combines the advantages of the above two devices, with low drive power and low saturation voltage drop. It is very suitable for use in converter systems with a DC voltage of 600V and above, such as AC motors, inverters, switching power supplies, lighting circuits, traction drives, and other fields.

[0003] At present, a Chinese patent announcement with announcement number CN210723005U discloses an IGBT heat sink for a frequency converter, comprising a side box and a heat dissipation mechanism, wherein a box slot is provided inside the side box, and a connecting port is arranged at the bottom side end of the box slot, a central fixed plate is installed on the inner side of the end of the side box, and buckles are arranged at the head and tail ends between the central fixed plate, a fixing screw is passed through the middle of the central fixed plate, the heat dissipation mechanism is arranged on the outer side of the side box, and an end plate is arranged at the side end of the heat dissipation mechanism. The IGBT heat sink for the frequency converter can conveniently perform heat dissipation operation through the cooperation of the connecting seat and the heat sink, and accelerate the circulation of liquid through the heat dissipation holes at the inner end thereof, thereby improving its water-cooled heat dissipation effect, and can be carried and bound through the use of the end plate and the end belt, so as to connect the device body and the IGBT for use, so that the two can be stably linked and coordinated, with better heat dissipation effect.

[0004] In actual use, it is found that the existing IGBT heat dissipation structure dissipates heat through water cooling and dissipates heat through heat sinks. However, due to the small spacing between the heat sinks, the air flow rate between the heat sinks is small, resulting in slow heat dissipation of the heat sink, and the heat dissipation effect is general, which affects the heat dissipation efficiency. Therefore, we propose an inverter IGBT heat dissipation structure to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art that the air flow rate between the heat sinks is low, resulting in slow heat dissipation of the heat sinks, general heat dissipation effect, and affecting the heat dissipation efficiency, and proposes a frequency converter IGBT heat dissipation structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A frequency converter IGBT heat dissipation structure comprises a frequency converter body, a heat sink is arranged at the bottom of the frequency converter body, and a water cooling mechanism is arranged inside the heat sink; function boxes are fixedly installed on both sides of the heat sink, motors are fixedly installed on the front inner wall of the function box, a reciprocating mechanism is arranged between the motor and the function box, and a heat dissipation mechanism is arranged below the function box.

[0008] Preferably, the water cooling mechanism includes a water cooling pipe, a water inlet and a water outlet, a water cooling pipe is arranged in the heat sink, a water inlet is arranged on the left side of the heat sink, the water inlet is located on the front side of a functional box, the water inlet is connected to one end of the water cooling pipe, a water outlet is arranged on the right side of the heat sink, the water outlet is located on the rear side of another functional box, and the water outlet is connected to the other end of the water cooling pipe.

[0009] Preferably, the reciprocating mechanism includes a reciprocating screw and a screw seat. The reciprocating screw is fixedly mounted on the motor output shaft. The rear end of the reciprocating screw is rotatably connected to the rear inner wall of the function box. A screw seat is provided on the threaded sleeve of the reciprocating screw, and a sliding mechanism is arranged between the screw seat and the function box.

[0010] Preferably, the sliding mechanism includes a slider and a slide groove, the top of the screw seat is provided with a slider, the top of the function box is provided with a slide groove, and the slider is slidably connected with the corresponding slide groove.

[0011] Preferably, a seat hole is opened at the bottom of the function box, and the screw seat is slidably connected to the corresponding seat hole.

[0012] Preferably, the heat dissipation mechanism includes two radiators, a heat sink and fan blades. The radiator is arranged under the functional box, the top of the radiator is slidably connected to the bottom of the corresponding functional box, the heat sinks are fixedly installed on the inner walls of the two radiators on the side away from each other, fan blades are arranged on the output shaft of the heat sink, and the bottom of the screw seat is fixedly connected to the top of the radiator.

[0013] Preferably, a heat sink is provided at the bottom of the heat sink plate, and the radiator is matched with the heat sink.

[0014] Beneficial effects of the utility model:

[0015] 1. Through the coordination of the water inlet, water cooling pipe and water outlet, the cold water in the water cooling pipe can be circulated and injected, the heat sink can be continuously cooled, and the heat absorbed by the heat sink can be diffused to the outside through the heat sink, thereby achieving the purpose of heat conduction and heat dissipation of the inverter body;

[0016] 2. Through the cooperation of the radiator, the heat sink and the fan blades, the air flow rate between the heat sink fins can be accelerated through the fan blades, and the purpose of rapid diffusion of heat on the heat sink can be achieved. Through the cooperation of the motor, the reciprocating screw and the screw seat, the motor can drive the radiator to move back and forth, and the heat sink fins can be blown back and forth through the radiator, which can increase the heat dissipation speed and improve the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional structural schematic diagram of a frequency converter IGBT heat dissipation structure proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of a frequency converter IGBT heat dissipation structure proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of a top cross-sectional structure of an inverter IGBT heat dissipation structure proposed by the utility model;

[0020] Figure 4 The schematic diagram of the structure of part A of the inverter IGBT heat dissipation structure proposed by the utility model.

[0021] In the figure: 1. Inverter body; 2. Heat sink; 3. Heat sink; 4. Water cooling pipe; 5. Water inlet; 6. Water outlet; 7. Function box; 8. Motor; 9. Reciprocating screw; 10. Screw seat; 11. Slider; 12. Slide; 13. Seat hole; 14. Radiator; 15. Heat sink; 16. Fan blade. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] Reference Figure 1-4A frequency converter IGBT heat dissipation structure includes a frequency converter body 1, a heat sink 2 is arranged at the bottom of the frequency converter body 1, and a water cooling mechanism is arranged in the heat sink 2; function boxes 7 are fixedly installed on both sides of the heat sink 2, motors 8 are fixedly installed on the inner wall of the front side of the function box 7, a reciprocating mechanism is arranged between the motor 8 and the function box 7, and a heat dissipation mechanism is arranged below the function box 7.

[0025] In this embodiment, the water cooling mechanism includes a water cooling pipe 4, a water inlet 5 and a water outlet 6. The water cooling pipe 4 is arranged in the heat sink 2. The water inlet 5 is arranged on the left side of the heat sink 2. The water inlet 5 is located on the front side of a functional box 7. The water inlet 5 is connected to one end of the water cooling pipe 4. The water outlet 6 is arranged on the right side of the heat sink 2. The water outlet 6 is located on the rear side of another functional box 7. The water outlet 6 is connected to the other end of the water cooling pipe 4. By providing a water cooling mechanism, cold water is injected into the water cooling pipe 4 through the water inlet 5, so that the purpose of uniformly cooling the heat sink 2 through the water cooling pipe 4 can be achieved.

[0026] In this embodiment, the reciprocating mechanism includes a reciprocating screw 9 and a screw seat 10. The reciprocating screw 9 is fixedly installed on the output shaft of the motor 8. The rear end of the reciprocating screw 9 is rotatably connected to the rear inner wall of the function box 7. The screw seat 10 is threadedly sleeved on the reciprocating screw 9. A sliding mechanism is arranged between the screw seat 10 and the function box 7. By providing a reciprocating mechanism, the motor 8 can drive the screw seat 10 to move back and forth, thereby achieving the purpose of driving the radiator 14 to move back and forth.

[0027] In this embodiment, the sliding mechanism includes a slider 11 and a slide groove 12. The slider 11 is arranged on the top of the screw seat 10, and the slide groove 12 is opened on the top of the function box 7. The slider 11 is slidably connected with the corresponding slide groove 12. By setting up the sliding mechanism, the screw seat 10 can move forward and backward more smoothly.

[0028] In this embodiment, a seat hole 13 is opened at the bottom of the function box 7, and the screw seat 10 is slidably connected to the corresponding seat hole 13. By providing the seat hole 13, the screw seat 10 can be connected to the radiator 14 through the seat hole 13.

[0029] In this embodiment, the heat dissipation mechanism includes two radiators 14, a heat sink 15 and fan blades 16. The radiator 14 is arranged below the function box 7. The top of the radiator 14 is slidably connected to the bottom of the corresponding function box 7. The heat sink 15 is fixedly installed on the inner wall of the side away from each other of the two radiators 14. The fan blades 16 are arranged on the output shaft of the heat sink 15. The bottom of the screw seat 10 is fixedly connected to the top of the radiator 14. By providing the heat dissipation mechanism, the heat sink 15 can drive the fan blades 16 to rotate, and the fan blades 16 can be used to accelerate the air flow rate between the heat sink 3, so as to achieve the purpose of increasing the rapid diffusion of heat on the heat sink 3.

[0030] In this embodiment, a heat sink 3 is provided at the bottom of the heat sink 2, and the radiator 14 is adapted to the heat sink 3. By providing the heat sink 3, the heat absorbed by the heat sink 2 can be diffused to the outside through the heat sink 3, thereby achieving the purpose of heat conduction and heat dissipation of the inverter body 1.

[0031] The utility model discloses that when in use, first inject cold water into the water-cooling pipe 4 through the water inlet 5, and the water-cooling pipe 4 is arranged in an S shape, so that the heat sink 2 can be evenly cooled through the water-cooling pipe 4, and the cold water can be discharged through the water outlet 6, so that the cold water in the water-cooling pipe 4 can be circulated and injected, so that the heat sink 2 can be continuously cooled, and the heat absorbed by the heat sink 2 can be diffused to the outside through the heat sink 3, so as to achieve the purpose of heat conduction and heat dissipation of the inverter main body 1, and the fan blades 16 can be driven to rotate by starting the heat sink 15, so that the air flow rate between the heat sink 3 can be accelerated through the fan blades 16, so as to achieve the purpose of increasing the rapid diffusion of the heat on the heat sink 3, and the reciprocating screw rod 9 can be driven to rotate by starting the motor 8, so as to drive the screw rod seat 10 to move back and forth, so as to drive the radiator 14 to move back and forth, so as to achieve the purpose of reciprocating blowing to the heat sink 3 through the radiator 14, so as to achieve the purpose of increasing the heat dissipation speed and improving the heat dissipation efficiency.

[0032] The above is a detailed introduction to a frequency converter IGBT heat dissipation structure provided by the utility model. This article uses specific embodiments to explain the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A frequency converter IGBT heat dissipation structure, characterized in that: It comprises a frequency converter body (1), a heat sink (2) is arranged at the bottom of the frequency converter body (1), and a water cooling mechanism is arranged inside the heat sink (2); Function boxes (7) are fixedly mounted on both sides of the heat dissipation plate (2), a motor (8) is fixedly mounted on the inner wall of the front side of the function box (7), a reciprocating mechanism is arranged between the motor (8) and the function box (7), and a heat dissipation mechanism is arranged below the function box (7); The reciprocating mechanism comprises a reciprocating screw (9) and a screw seat (10); the reciprocating screw (9) is fixedly mounted on the output shaft of the motor (8); the rear end of the reciprocating screw (9) is rotatably connected to the rear inner wall of the function box (7); a screw seat (10) is threadedly sleeved on the reciprocating screw (9); and a sliding mechanism is provided between the screw seat (10) and the function box (7); The heat dissipation mechanism comprises two heat sinks (14), a heat sink (15) and a fan blade (16); a heat sink (14) is arranged below the function box (7); the top of the heat sink (14) is slidably connected to the bottom of the corresponding function box (7); the heat sink (15) is fixedly installed on the inner wall of the two heat sinks (14) on the side away from each other; the fan blade (16) is arranged on the output shaft of the heat sink (15); and the bottom of the screw seat (10) is fixedly connected to the top of the heat sink (14).

2. The inverter IGBT heat dissipation structure according to claim 1, characterized in that: The water cooling mechanism comprises a water cooling pipe (4), a water inlet (5) and a water outlet (6); the water cooling pipe (4) is arranged inside the heat sink (2); the water inlet (5) is arranged on the left side of the heat sink (2); the water inlet (5) is located on the front side of a functional box (7); the water inlet (5) is connected to one end of the water cooling pipe (4); the water outlet (6) is arranged on the right side of the heat sink (2); the water outlet (6) is located on the rear side of another functional box (7); the water outlet (6) is connected to the other end of the water cooling pipe (4).

3. The inverter IGBT heat dissipation structure according to claim 1, characterized in that: The sliding mechanism comprises a slider (11) and a slide groove (12); the top of the screw seat (10) is provided with a slider (11); the top of the function box (7) is provided with a slide groove (12); the slider (11) is slidably connected to the corresponding slide groove (12).

4. The inverter IGBT heat dissipation structure according to claim 1, characterized in that: A seat hole (13) is provided at the bottom of the function box (7), and the screw seat (10) is slidably connected to the corresponding seat hole (13).

5. The inverter IGBT heat dissipation structure according to claim 1, characterized in that: A heat sink (3) is provided at the bottom of the heat sink plate (2), and the heat sink (14) is compatible with the heat sink (3).

Images