The test box is a necessary test equipment in the fields of aviation, automobiles, home appliances, scientific research, etc. It is used to test and determine the parameters and performance of electrical, electronic and other products and materials after high temperature, low temperature, or constant test temperature environment changes. The test box is operated by three interconnected systems: refrigerant circulation system, air circulation system, electrical automatic control system. And these three systems are related to the price of the test box. The following will be introduced to you by our company.
The refrigerant circulation system of the test chamber is that the liquid refrigeration in the evaporator absorbs the heat of the air and begins to evaporate. Eventually, a certain temperature difference is formed between the refrigeration and the air. The liquid refrigeration also completely evaporates into a gaseous state, which is then absorbed by the compressor and Compressed, the gaseous refrigerant absorbs heat through the condenser and condenses into a liquid. After throttling through the expansion valve, it turns into a low-temperature and low-pressure refrigerant and enters the evaporator, and finally completes the refrigerant circulation process.
The air circulation system of the test chamber is responsible for drawing air from the return air inlet through the fan. After passing through the evaporator, humidifier, and electric heating, the air is sent to the space required by the customer through the air outlet, and the air sent out is mixed with the air in the air. Then return to the tuyere.
The electrical automatic control system of the test chamber is composed of the power part through the contactor, and the automatic control of the power supply for the compressor, fan, electric heater, humidifier and other parts is divided into temperature and humidity control and fault protection parts: temperature and humidity control are Through the temperature and humidity controller, the temperature and humidity of the return air are compared with the temperature and humidity set by the user, and the compressor, humidifier, electric heating and other components are automatically performed to realize automatic control of constant temperature and humidity.
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