Heat dissipation device for electric precipitation high-frequency power supply inverter

Abstract

The utility model discloses an electric precipitation high frequency power supply inverter heat radiation device comprising a cabinet, an installation box is arranged in the cabinet, a heat radiation plate is arranged in the installation box, and the upper side and the lower side in the heat radiation plate are respectively provided with a first flow channel and a second flow channel. A plurality of third flowing channels are vertically arranged between the first flowing channel and the second flowing channel, the first flowing channel and the second flowing channel are communicated together through the third flowing channels, and stirring assemblies are arranged in the third flowing channels. According to the utility model, the heat generated by the heating unit is led out of the equipment through the pipeline for processing, so that the temperature of the inverter is effectively controlled, the influence on the temperature of other devices of the high-frequency power supply is effectively reduced, and the stability and reliability of system operation are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat dissipation of power supply cabinets, and particularly relates to a heat dissipation device for an inverter of a high-frequency power supply for electrostatic precipitators. Background Art

[0002] The input power supply required by an electrostatic precipitator is a high-voltage DC power supply. Therefore, the high-frequency power supply of an electrostatic precipitator generally inputs a three-phase AC 380V power supply, which is rectified and inverted, stepped up by a step-up transformer and rectified to output a DC high voltage of 72kV or 80kV. Therefore, the inverter is one of the important working units of the high-frequency power supply of an electrostatic precipitator. The heat generated due to energy loss during the power conversion process is inevitable. Without an effective heat dissipation method, the overheating of internal power devices will directly affect their service life and reliability. With the national requirement for ultra-low emissions, the requirement for the output power of electrostatic precipitator power supplies is developing in the direction of being larger and larger, while the power supply products are increasingly developing towards miniaturization. Therefore, its volume heat power density is very high, which puts forward higher requirements for the heat dissipation performance of the inverter of the high-frequency power supply for electrostatic precipitators.

[0003] The existing high-frequency power supplies mainly adopt the forced air cooling method, that is, a circulating air duct is established inside the device, and heat-generating bodies such as power device radiators are arranged in the air duct, and external cooling air is used to enter the air duct to take out the heat from the device. This heat dissipation method is highly practical and easy to maintain, so it is relatively popular. However, for power supplies with greater heat and smaller volume, its heat exchange efficiency cannot meet the requirements. In view of this, it is necessary to study a heat dissipation device for an inverter of a high-frequency power supply for electrostatic precipitators. Summary of the Invention

[0004] To solve the deficiencies of the prior art, the purpose of the utility model is to provide a heat dissipation device for an inverter of a high-frequency power supply for electrostatic precipitators, which conducts the heat generated by the heat-generating unit to the outside of the device through pipelines for treatment, effectively controls the temperature of the inverter while effectively reducing the influence on the temperatures of other components of the high-frequency power supply, and improves the stability and reliability of the system operation.

[0005] To achieve the above objectives, the utility model adopts the following technical solutions:

[0006] A heat dissipation device for an inverter of a high-frequency power supply for electrostatic precipitators includes a cabinet, an installation box is arranged inside the cabinet, a heat dissipation plate is arranged inside the installation box, a first flow channel and a second flow channel are respectively opened on the upper side and the lower side inside the heat dissipation plate, a plurality of third flow channels are vertically arranged between the first flow channel and the second flow channel, the third flow channels connect the first flow channel and the second flow channel together, and a stirring component is arranged inside the third flow channels.

[0007] Preferably, the aforementioned stirring component includes a plurality of oval blades vertically rotatably connected through pin shafts.

[0008] Preferably, mounting rods are provided at the upper part of the aforementioned third flow channel. Both ends of the bottom of the mounting rods are connected to the bottom plate through support rods. Round holes are provided on the bottom plate. The top end of the stirring assembly is connected to a T-shaped connecting block. The lower part of the T-shaped connecting block is cylindrical, and its lower part movably passes through the round holes to drive the stirring assembly to rotate with the water flow.

[0009] Preferably, the aforementioned elliptical blades are made of a polymer composite material.

[0010] Preferably, a return pipe is connected between the inlet end of the aforementioned first flow channel and the outlet end of the second flow channel near it, and a return pump is provided on the return pipe.

[0011] Preferably, an inlet pipe communicating with the first flow channel is provided at the upper part of the aforementioned heat dissipation plate, and an outlet pipe communicating with the second flow channel is provided at the lower part.

[0012] Preferably, the aforementioned inlet pipe and outlet pipe are respectively connected to an external heat exchanger through pipelines.

[0013] Preferably, a filter screen is provided at the air inlet of the aforementioned external heat exchanger.

[0014] Preferably, a liquid level gauge is provided on the aforementioned inlet pipe.

[0015] Preferably, IGBT mounting holes and three-phase rectifier bridge mounting holes are provided on the front side of the aforementioned heat dissipation plate.

[0016] The beneficial effects of the present utility model are as follows:

[0017] (1) The present utility model separately processes the heat dissipation mechanism of the high-frequency power inverter unit, improving the flexibility of system heat dissipation control. The heat generated by the heating unit is led out of the device through pipelines for processing. While effectively controlling the temperature of the inverter, it effectively reduces the influence on the temperatures of other components of the high-frequency power supply, improving the stability and reliability of system operation;

[0018] (2) The present utility model places the external heat exchanger beside the whole power supply unit, and its height is more than 0.5 m higher than the heat pipe heat dissipation plate. Its heat dissipation process can reduce the influence on the heat dissipation of other components of the high-frequency power supply and is convenient for daily maintenance of the external heat exchanger; a detachable filter screen is provided on the air inlet surface of the external heat exchanger, which is convenient for maintenance and cleaning, improving the stability of system operation and saving maintenance costs;

[0019] (3) The coolant flow entering the third flow channel through the first flow channel will drive the stirring component to rotate continuously and rapidly. Each blade is rotatably connected, and under the drive of the coolant, the stirring directions of each blade are different, which can further change the flow state of the coolant in the channel, so as to strengthen the stirring effect of the coolant in the third flow channel, thereby improving the heat exchange effect and the uniformity of the heat exchange temperature; part of the coolant flows back to the first flow channel through the return pipe, which can enable the coolant to achieve sufficient heat exchange and improve the heat exchange effect. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is an implementation manner of the heat dissipation plate in the present utility model;

[0022] Figure 3 is another implementation manner of the heat dissipation plate in the present utility model;

[0023] Figure 4 is another implementation manner of the heat dissipation plate in the present utility model;

[0024] Figure 5 is another implementation manner of the heat dissipation plate in the present utility model;

[0025] Figure 6 is a cross-sectional view of the heat dissipation plate in the present utility model;

[0026] Figure 7 is a schematic structural diagram of the stirring component in the present utility model.

[0027] The meanings of the reference numerals in the drawings: 1. Heat dissipation plate; 101. First flow channel; 102. Second flow channel; 103. Third flow channel; 104. Pin shaft; 105. Oval blade; 106. Mounting rod; 107. Support rod; 108. Bottom plate; 109. T-shaped connection block; 110. Return pipe; 111. Return pump; 2. Inverter installation box; 3. Inlet pipe; 4. Outlet pipe; 5. IGBT module; 6. Rectifier bridge; 7. Liquid level gauge; 8. External heat exchanger; 9. Filter screen; Detailed Embodiment

[0028] The following specifically introduces the present utility model in conjunction with the drawings and specific embodiments.

[0029] See Figure 1, A heat dissipation device for a high-frequency power inverter of an electrostatic precipitator of the present utility model includes a cabinet, an installation box 2 is arranged inside the cabinet, a heat dissipation plate 1 is arranged inside the installation box 2, and the heat dissipation plate 1 is processed from aluminum profiles. A first flow channel 101 and a second flow channel 102 are respectively arranged on the upper side and the lower side inside the heat dissipation plate 1. An inlet pipe 3 communicated with the first flow channel 101 is arranged on the upper part of the heat dissipation plate 1, and an outlet pipe 4 communicated with the second flow channel 102 is arranged on the lower part.

[0030] See Figure 2 and Figure 3 , both the inlet pipe 3 and the outlet pipe 4 are 2 or 4. Among them, 4 are one for standby and one for use. The pipeline interface direction can be determined according to the actual situation on site, either to the left or to the right. IGBT installation holes and three-phase rectifier bridge 6 installation holes are arranged on the front side of the heat dissipation plate 1 for fixing the rectifier bridge 6 module device and the IGBT module 5 device. A heat-conducting silicone grease is applied to the connection surfaces of the IGBT module 5 and the rectifier bridge 6 with the aluminum profile heat dissipation plate 1. See Figure 4 and Figure 5 , the IGBT installation holes are located in the upper part and are symmetrically arranged in the middle left and right. The rectifier bridge 6 installation holes are located in the lower part and can be arranged in the middle left and right or on the right side, which can be adjusted according to actual needs.

[0031] The inlet pipe 3 and the outlet pipe 4 are respectively connected to an external heat exchanger 8 through pipelines. The external heat exchanger 8 is more than 0.5 m higher than the heat dissipation plate 1. A pull-out and detachable filter screen 9 is arranged at the air inlet of the external heat pipe radiator, which is convenient for cleaning the filter screen 9 and improves the maintainability of the system. A liquid level gauge 7 is arranged on the inlet pipe 3 to facilitate observing the liquid level of the refrigerant medium in the system.

[0032] See Figure 6 and Figure 7 , a plurality of third flow channels 103 are vertically arranged between the first flow channel 101 and the second flow channel 102, and the third flow channels 103 connect the first flow channel 101 and the second flow channel 102 together. A return pipe 110 is connected between the first flow channel 101 near its inlet end and the second flow channel 102 near its outlet end, and a return pump 111 is arranged on the return pipe 110. A stirring component is arranged inside the third flow channel 103. The stirring component includes a plurality of oval blades 105 vertically rotatably connected through a pin shaft 104, and the oval blades 105 are made of a polymer material.

[0033] An installation rod 106 is arranged on the upper part of the third flow channel 103. Both ends of the bottom of the installation rod 106 are connected to a bottom plate 108 through a support rod 107. A round hole is arranged on the bottom plate 108. The top end of the stirring component is connected to a T-shaped connection block 109. The lower part of the T-shaped connection block 109 is cylindrical, and its lower part movably passes through the round hole to drive the stirring component to rotate with the water flow.

[0034] To better illustrate the present utility model, the following specifically describes its working process:

[0035] When the high-frequency power supply is operating, the main heating components of the inverter, namely the IGBT and the rectifier bridge 6, generate heat, which is conducted to the coolant inside the inverter cooling unit through the aluminum profile heat pipe heat dissipation plate 1. The coolant enters the third flow channel 103 through the first flow channel 101. The flow of the coolant will drive the stirring assembly to rotate continuously and rapidly, and the blades are rotatably connected to each other, changing the flow state of the coolant in the channel. Part of the coolant in the second flow channel 102 flows back to the first flow channel 101 through the return pipe 110, so that the coolant is mixed with the coolant in the first flow channel 101 for heat exchange to achieve sufficient heat exchange. The heat-exchanged coolant reaches the external heat exchanger 8 through the pipeline. The external heat exchanger 8 cools the coolant, and the cooled coolant flows back to the aluminum profile heat pipe heat dissipation plate 1 again, thereby achieving the heat dissipation effect.

[0036] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the above embodiments do not limit the present utility model in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present utility model.

Claims

1. A heat dissipation device for an electrostatic precipitator high-frequency power inverter, comprising a cabinet, wherein a mounting box (2) is arranged in the cabinet, characterized in that: A heat sink (1) is arranged in the installation box (2); a first flow channel (101) and a second flow channel (102) are respectively provided on the upper side and the lower side of the heat sink (1); a plurality of third flow channels (103) are vertically arranged between the first flow channel (101) and the second flow channel (102); the third flow channels (103) connect the first flow channel (101) and the second flow channel (102); and a stirring assembly is arranged inside the third flow channel (103).

2. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 1, characterized in that: The stirring assembly comprises a plurality of elliptical blades (105) connected for vertical rotation via a pin shaft (104).

3. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 2, characterized in that: A mounting rod (106) is provided at the upper portion of the third flow channel (103); the two ends of the bottom of the mounting rod (106) are connected to a bottom plate (108) via supporting rods (107); a circular hole is provided on the bottom plate (108); the top end of the stirring assembly is connected to a T-shaped connecting block (109); the lower portion of the T-shaped connecting block (109) is cylindrical and moves through the circular hole to drive the stirring assembly to rotate with the water flow.

4. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 2, characterized in that: The elliptical blades (105) are made of high molecular polymer material.

5. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 1, characterized in that: A reflux pipe (110) is connected between the first flow channel (101) near its inlet end and the second flow channel (102) near its outlet end, and a reflux pump (111) is provided on the reflux pipe (110).

6. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 1, characterized in that: The upper part of the heat dissipation plate (1) is provided with an inlet pipe (3) communicating with the first flow channel (101), and the lower part is provided with an outlet pipe (4) communicating with the second flow channel (102).

7. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 6, characterized in that: The inlet pipe (3) and the outlet pipe (4) are respectively connected to an external heat exchanger (8) via pipelines.

8. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 7, characterized in that: The air inlet of the external heat exchanger (8) is provided with a filter (9).

9. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 6, characterized in that: The inlet pipe (3) is provided with a liquid level meter (7).

10. The heat dissipation device for high-frequency power inverter of electrostatic precipitator according to claim 1, characterized in that: An IGBT mounting hole and a three-phase rectifier bridge mounting hole are provided on the front side of the heat dissipation plate (1).

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