Earth surface environment comprehensive test platform with rapid temperature rising and cooling capacity

Abstract

An earth surface environment comprehensive test platform with rapid temperature rising and cooling capacity comprises a box body, a refrigerating system and a PLC control system, a touch screen is arranged on the side wall of the box body, a temperature control sensor is installed at an air outlet of a circulating fan at the top of the box body, and an electric heater and a temperature controller for temperature protection are arranged in the box body. The refrigeration system comprises a cascade refrigeration compressor, an evaporator and a liquid nitrogen refrigeration device, the liquid nitrogen refrigeration device comprises a liquid nitrogen tank (1), an electromagnetic valve (2) and a liquid nitrogen flow dividing and leading-out pipeline (3), an outlet of the liquid nitrogen flow dividing and leading-out pipeline (3) is formed in the box body, and a time relay of the electromagnetic valve (2) of the liquid nitrogen refrigeration device is connected with a relay of the cascade refrigeration compressor in parallel; and the electric heater, the cascade refrigeration compressor and the circulating fan are all electrically connected with the PLC control system, the temperature control sensor and the temperature controller for temperature protection are electrically connected with the PLC control system, and the PLC control system is connected with the touch screen. The temperature change rate of the test box is greatly improved.

Description

technical field [0001] The invention relates to a test platform, in particular to a comprehensive test platform for surface environment with rapid heating and cooling capabilities, and belongs to the technical field of test chambers. Background technique [0002] At present, the existing 54 cubic meter surface comprehensive test platform is not capable of increasing the heating and cooling rate. If the cooling power of the refrigeration compressor is increased and the large-area refrigeration evaporator is replaced, it will not only be expensive, but also the volume and structure of the existing equipment will be limited in terms of space. The evaporator with an enlarged area cannot be accommodated, so it cannot meet the test condition requirements of important customers. Contents of the invention [0003] The purpose of the present invention is to provide a comprehensive test platform for surface environment with rapid heating and cooling capabilities in order to solve th...

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Problems solved by technology

[0002] At present, the existing 54 cubic meter surface comprehensive test platform is not capable of increasing the heating and cooling rate. If the cooling power of the refrigeration compressor is increased and the large-area refrigeration evaporator is replaced, it will not only be expensive, but also the volume and structure of the existing equipment will be limited in terms of space. The evaporator with an enlarged area cannot be accommodated, so it cannot meet the test conditions of important customers

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