Two-stage temperature control device for pump-driven two-phase fluid loop

The invention provides a two-stage temperature control device for a pump-driven two-phase fluid loop according to technological difficulties in temperature precise control of a large-scale pump-driven two-phase fluid loop. Temperature control of original liquid reservoirs and high and low-temperature volume change compensation of working mediums in a pump-driven two-phase fluid loop system are separated, and accurate control on the temperature of the system can be realized. According to the device of the invention, temperature control of the original liquid reservoirs and high and low-temperature volume change compensation of the working mediums in the pump-driven two-phase fluid loop system are separated; a large storage tank with a large volume is mainly used for providing a larger space, the volume change of the working medium caused by the temperature change of the system is allowed; a small storage tank with a small volume is used for temperature control, and the liquid level of the working medium in the small storage tank does not change with the temperature of the system; since the volume of the small storage tank is small, the temperature uniformity of the small storage tank is good, and higher control accuracy can be achieved for the system; since only the temperature of the working medium in the small storage tank is controlled, power required by temperature control is small, energy can be saved; and temperature change reaction after temperature control is quick, and response time is short.