Pump-driven two-phase cooling system and working method thereof

Abstract

The invention provides a pump-driven two-phase cooling system and a working method thereof, a heating device is arranged on a liquid storage tank of the system, a vapor phase area of the liquid storage tank is connected with an inlet of a condenser, and a liquid phase area of the liquid storage tank is connected with an inlet of a circulating pump. An evaporator is connected with an outlet of thecirculating pump and an inlet of the condenser, and an outlet of the condenser is connected with an inlet of the circulating pump. A temperature measuring device, a pressure measuring device and a control valve are arranged on connecting pipelines between the circulating pump and the liquid storage tank and between the circulating pump and the evaporator and between the condenser and the evaporator respectively; and a flow measuring device is arranged on a pipeline where the circulating pump and the evaporator are connected with each other. The pressure measuring device is arranged in a gas phase area of the liquid storage tank, and a liquid level measuring device is arranged in the liquid storage tank. The processing unit is electrically connected with the temperature, pressure, flow andliquid level measuring device and the control valve. According to the system and the working method thereof provided by the invention, the system control method can be simplified, and the reliabilityof the cooled equipment, the pump and the whole system is improved.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of power electronic equipment, in particular to a pump-driven two-phase cooling system and a working method thereof. Background technique [0002] Due to the lightweight and miniaturization requirements of power electronic equipment, the power consumption density is greatly increased, and the single-phase liquid cooling method is becoming more and more difficult to meet the application requirements. The pump-driven two-phase cooling system utilizes the latent heat of evaporation and condensation of the phase-change working fluid, which can provide more efficient, more stable, and more uniform heat exchange effects. At the same time, it is safer in operation, smaller in size, and more flexible. A new generation of heat dissipation technology that has attracted much attention in the equipment field. [0003] The basic principle of the pump flooding two-phase system is: the pure liquid work...

AI Technical Summary

Problems solved by technology

There are two commonly used installation methods for liquid storage tanks: one is figure 1 For the temperature control type shown, the liquid storage tank is connected to the system through the pipeline at the bottom, and the pressure of the liquid storage tank is controlled by raising or lowering the temperature of the liquid storage tank to control the pressure of the evaporator or condenser. The heating and cooling devices are installed on the liquid tank, and the control strategy is more complicated. The advantage is that the temperature control accuracy of the system is higher; the other is figure 2 In the circuit type shown, the liquid storage tank is connected in series with the system through a pipeline at the top and bottom, and the working fluid is stored in the liquid storage tank after condensation. The advantage of this type is that the production and control of the liquid storage tank are relatively simple, and the system operation method It is relatively simple, but the disadvantage is that the liquid filling volume of the system is not well controlled, the supercooling degree of the outlet of the liquid storage tank is insufficient, and the pump is prone to cavitation, which affects the stable and safe operation of the system

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