Environmental simulation chamber or high and low temperature test chamber, widely used in electronics, instrumentation, automobiles, aerospace and many other fields, environmental simulation chamber can simulate various climatic conditions, extreme high temperature or low temperature climate, high temperature and high humidity climate, low pressure and low oxygen climate, salt spray environment, cold and hot alternating test chamber, etc., used to test the resistance of items under different climatic conditions.
So, how is the environmental simulation chamber or test chamber refrigerated?
According to different refrigeration methods, the refrigeration capacity, power consumption, and maintenance difficulty of the environmental chamber and the test chamber will also be different.
Water. For water cooling, the fluidity of water is mainly used to dissipate heat. The water tower needs to be installed on the environmental simulation chamber or test chamber, and the water tower can only be placed on the roof outside, not indoors. The water tower should also be protected, and the water pipe should be wrapped well, so that it cannot be exposed to the sun or freeze and crack, so as to prolong the life of the water tower.
Air-cooled. For air cooling, it is mainly used to use wind power for natural cooling, which is more suitable for low-power environmental simulation chambers or test chambers. If the ambient temperature of the chamber or chamber is always kept at room temperature and equipped with an exhaust device, the use of air cooling for cooling can effectively extend the service life of the chamber or chamber.
Compressor refrigeration.
Compressor refrigeration is currently the most common refrigeration method and is widely used. Specifically, the motor is used to drive the compressor to compress the refrigerant, so that it changes from a low-temperature and low-pressure state to a high-temperature and high-pressure state, and dissipates heat through the heat exchanger, and finally obtains a low-temperature refrigerant to complete the refrigeration process. This refrigeration method mainly includes the following key steps: compressor work, condenser work, expansion valve work, evaporator work. The advantages of this refrigeration method are good refrigeration effect and high reliability, but the cost is high, the maintenance is difficult, and the power consumption is high.
Thermoelectric refrigeration. Thermoelectric refrigeration is a new type of refrigeration that works by converting the thermoelectric effect into refrigeration through a thermoelectric module. Compared with compressor refrigeration, thermoelectric refrigeration has no noise, no vibration, and high efficiency and energy saving, but its refrigeration capacity is relatively weak and expensive.
Absorption refrigeration.
Absorption refrigeration is the use of solvents to absorb or release refrigerants for refrigeration, and natural gas can be used as fuel for heating drive. Absorption refrigeration is a high-efficiency and energy-saving refrigeration method, and has the advantages of environmental protection and no noise. However, due to its complex structure and high cost, the scope of use is relatively narrow.
Environmental simulation chambers or test chambers sometimes need to quickly reduce the internal temperature from normal temperature to low temperature or rise to high temperature in a short period of time, and can remain stable continuously, so the cooling capacity required is large.
The interior of the environmental simulation chamber or test chamber is usually equipped with refrigeration circulation pipelines and air circulation devices, and the temperature inside the environmental simulation chamber or test chamber can be rapidly reduced or increased by adjusting these equipment, and the temperature stability can be maintained.
Specifically, in the refrigeration cycle, the traditional refrigerant refrigerant is driven by a compressor and is circulated in a closed loop to complete the refrigeration process. The air circulation device in the environmental simulation chamber or test chamber is composed of a fan and a circulating air duct, which is responsible for transmitting cold or hot air and maintaining a balanced temperature environment through circulation.
In practical applications, the refrigeration intensity and refrigeration effect of the environmental simulation chamber or test chamber need to be adjusted according to the actual needs to meet the test requirements in different temperature environments.