Cooling system for power electronic equipment

A cooling system, power electronics technology, applied in mechanical equipment, lighting and heating equipment, refrigerators, etc., can solve problems such as increasing failure rate, thermal fatigue of devices, and consuming large mechanical energy, and achieve the effect of increasing failure rate

Active Publication Date: 2021-07-20
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, its peak may exceed the allowable operating temperature value of power electronic devices; on the other hand, large temperature fluctuations will cause thermal fatigue of the internal soldering of the device, thereby increasing the failure rate
[0004] On the other hand, in addition to providing the power for the

Method used

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  • Cooling system for power electronic equipment
  • Cooling system for power electronic equipment
  • Cooling system for power electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Example 1

[0058] Such as figure 1 As shown, the cooling system 10 for the power electronics, including the evaporator 1, a gas-liquid separator 2, a compressor 3, and a condensed device 4. Among them, the outlet of the evaporator 1 is connected to the inlet of the gas-liquid separator 2. The inlet of the compressor 3 is connected to the outlet of the gas-liquid separator 2, the outlet of the compressor 3 and the inlet of the condensed device 4. A throttle valve 5 is provided between the outlet of the condensation device 4 and the inlet of the evaporator 1.

[0059] According to an embodiment of the present invention, according to the real-time working condition of the cooling device, the flow rate of the liquid working fluid after condensed device is greater than the evaporator completely evaporative. The required flow is required to ensure that the working fluid dryness of the exit and exit of the evaporator is less than 1, thereby so that the working fluid liquid near t...

Example Embodiment

[0066] Example 2

[0067] Such as figure 2 As shown, the cooling system 10 'for the power electronics according to the embodiment of the present invention is based on the above-described embodiment 1, and the difference is:

[0068] The outlet of the compressor 3 is connected to the inlet of the gas-liquid separator 2, and a control valve 101 is provided between the outlet of the compressor 3 and the inlet of the gas-liquid separator 2. In this configuration, the cold side outlet of the heat exchanger is a small amount of liquid, and the hot side exit is an overcooling liquid state, and the high-temperature steam of the compressor outlet is introduced into the gas-liquid separator for mixing and heat transfer. The low temperature liquid is effectively adjusted to the amount of overheated vapor entering the compressor and improving heat exchange efficiency.

[0069] Preferably, if figure 2 As shown in the present embodiment, a liquid level monitoring device 21 is provided in the ai...

Example Embodiment

[0071] Example 3

[0072] Such as image 3 As shown, the cooling system 10 for power electronics, including evaporator 1, gas-liquid separator 2, compressor 3, and condenser 1, exit and gas-liquid separator of the evaporator 1. 2 The inlet connection. The inlet of the compressor 3 is connected to the outlet of the gas-liquid separator 2, the outlet of the compressor 3 and the inlet of the condensed device 4. Exit of the condensed device 4 is provided with a throttle between the outlet of the evaporator 1. Valve 5.

[0073] According to the cooling system of the power electronics of the present invention, according to the real-time working condition of the cooling device, the flow rate of the liquid working fluid after condensed device is greater than the evaporator is completely evaporated by the condensed device. Flow to ensure that the working body of the exit and the exit of the evaporator is less than 1, thereby so that the working fluid liquid near the outlet and the outlet. T...

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Abstract

The invention provides a cooling system for power electronic equipment. The cooling system comprises an evaporator, a gas-liquid separator, a compressor and a condensing device. Wherein an outlet of the evaporator is connected with an inlet of the gas-liquid separator. An inlet of the compressor is connected with an outlet of the gas-liquid separator, and an outlet of the compressor is connected with an inlet of the condensing device. A throttle valve is arranged between an outlet of the condensing device and an inlet of the evaporator. According to the provided cooling system for the power electronic equipment, a working medium at the outlet of the evaporator can carry liquid, and meanwhile it is ensured that the air suction end of the compressor can suck superheated steam without liquid; therefore, the temperature near the outlet of the evaporator can be prevented from sharply rising to exceed the allowable working temperature value of the power electronic device, and the failure rate increasing caused by thermal fatigue of internal welding of the device due to relatively large temperature fluctuation can be avoided so that different requirements on the cooling system under different environment temperatures and different working conditions can be met.

Description

technical field [0001] The invention relates to the technical field of power electronic equipment cooling, in particular to a cooling system for power electronic equipment. Background technique [0002] With the development of power electronics technology and the further improvement of social electrification, the heat dissipation requirements of electrical equipment are increasing. With the increasing demand for weight reduction and volume reduction, the power density is also increasing. Water cooling can no longer meet the cooling demand of high power density, and refrigeration systems are widely used in power electronic equipment. [0003] At present, the refrigeration system used for cooling power electronic equipment is mainly based on the principle of simply transplanting the air conditioning system, using high condensation pressure to increase the condensation temperature, and then reducing the pressure through throttling, so that the evaporation temperature can be con...

Claims

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Application Information

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IPC IPC(8): F25B1/00F25B40/06F25B41/20F25B41/30F25B43/00F25B49/02
CPCF25B1/00F25B43/00F25B40/06F25B49/02F25B2700/19F25B2700/2113F25B2700/04
Inventor 姚磊冯钊赞何凯吴辉李奎王春燕马明田恩李诗怀梁好玉曾云峰王幸智张港
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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