Internal structure of cold and hot shock chamber

The hot and cold impact chamber is used to test the composite material and material structure, tolerate it in an instant under the continuous environment of high temperature and extremely low temperature, that is, to test its chemistry caused by thermal expansion and contraction in the shortest time. Change or physical damage. The applicable objects include metals, plastics, rubber, electronics, etc., which can serve as a basis or reference for the improvement of their products.

The hot and cold impact test box, also known as the three-box cold and heat shock test box, is mainly composed of a low temperature storage room, a high temperature storage room and an impact temperature test room. Knowing the working principles of the three chambers plays a crucial role in how to operate scientifically and how to reasonably protect them. Kunshan Haida Instruments conducts technical publicity on the working principles of the three chambers to facilitate reference by users.

(1) Low-temperature storage room: The temperature state in the tank is determined by the operating status of the heater, evaporator, and fan in the duct. After the refrigerant flowing out of the expansion valve is throttled into the evaporator in the working chamber, the heat in the working chamber is absorbed and vaporized, so that the temperature in the working chamber is reduced; the vaporized working medium is sucked by the compressor and compressed into high temperature and high pressure gas to enter the condenser The medium is condensed into a liquid, passed through a screening procedure, and finally throttling through an expansion valve. The evaporator is then re-entered in the working chamber to absorb heat and vaporize and is then compressed by the compressor. The reciprocating loop work so that the temperature of the working chamber falls to the set temperature requirement

(2) High-temperature storage room: The central controller detects the instantaneous signal from the temperature sensing element, compares it with the set temperature signal, and obtains the comparison signal. The proportion of time that the solid state relay is turned on or off is controlled by the output signal of the PID logic circuit of the meter. Adjust the output power of the heater to achieve the purpose of automatic temperature control.

(3) Impact temperature test chamber: The instrument automatically controls the high-low temperature gas valve and switches between the low-temperature or high-temperature storage chambers to form a closed-circuit air circulation system with the high-temperature tank or the cryogenic tank respectively, and rapidly reach the target temperature of the test. The temperature state in the test chamber is determined by the operating status of the heater, evaporator, and blower in the air duct. The test chamber working chamber adopts the forced axial flow “dispersive” type loop wind work, which can greatly increase the parameters such as the fluctuation and evenness of the equipment operation.

After fully grasping the internal structure and working principle of the hot and cold shock test box, the test effect of the cold and hot shock test box can be more fully improved. To provide more help for the work, if you need to know more technical issues, please consult Kunshan Haida Instruments, our main type of environmental testing equipment: constant temperature and humidity equipment, high and low temperature test chamber, salt spray test chamber, aging box , Anti-yellowing test box, etc., will provide you with a set of efficient technical solutions.