Semiconductor thermopile precise temperature control liquid cooling source system

Abstract

The invention relates to a semiconductor thermopile precise temperature control liquid cooling source system, and belongs to the technical field of refrigeration and man-machine environment engineering. The system comprises a semiconductor thermopile, a liquid accumulator, a three-way valve, an air heat exchanger, a fan, a first liquid pump and a second liquid pump; two circulating liquid working loops are formed by two heat exchange channels of the semiconductor thermopile; when the outdoor air temperature is low, the outdoor air serves as a natural cold source, the natural temperature difference between the first circulating liquid and the outdoor low-temperature air is utilized, the thermal load of a controlled object is directly released to the outdoor air, and natural cooling is achieved. According to a real-time state, four working modes, namely thermoelectric refrigeration, natural cooling and thermoelectric refrigeration, natural cooling and semiconductor heating are operated in order, the refrigerating capacity or heating capacity is accurately controlled, and the liquid supply temperature is accurately controlled. The system of the invention is a thermoelectric refrigeration and natural cooling composite thermal control system which is suitable for all-weather working environment temperature precision control of optical, electrical, microwave and electromagnetic systems, precision machining equipment and the like.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and human-machine environment engineering, and specifically relates to a liquid cooling source system for realizing precise temperature control of photoelectric or mechanical equipment working in a wide temperate climate condition of -40 to 60°C. Background technique [0002] Electronic warehouses of vehicles, photoelectric, magnetoelectric and microwave equipment, precision machining machinery and equipment, etc. all have the requirement of working in all-weather and wide temperature range, and usually have the characteristics of high heat flux density and frequent changes in heat load. This type of equipment not only needs cooling, but also needs heating in cold seasons or cold starts, and even has high requirements for the response speed and temperature control accuracy of the thermal control system, in order to improve the stability, reliability, accuracy, and maneuverability of its work....

AI Technical Summary

Problems solved by technology

[0005] The biggest obstacle restricting the application of semiconductor thermoelectric refrigeration technology is the low energy efficiency ratio (energy efficiency ratio = cooling capacity / power consumption), relatively high primary investment and operating costs, such as figure 2 Shown is a block diagram of the structure and principle of the air-cooled semiconductor refrigeration system. Its working principle is to transfer the thermal load of the controlled object to the B terminal 1B of the thermal pile through the semiconductor thermal pile, and then release it to the environment (outdoor air). This type of semiconductor thermoelectric The refrigeration energy efficiency ratio of the refrigeration system is usually between 0.5 and 0.9, which is much lower than the energy efficiency ratio of the vapor compression refrigeration system in the same temperature range of 2.4 to 3.0

Images