Analysis of refrigeration cycle principle, advantages and disadvantages of high and low temperature test chamber
This article introduces the principle, advantages and disadvantages of the refrigeration cycle of the high and low temperature test chamber by Dongguan Qinzhuo Environmental Testing Equipment Co., Ltd. Welcome to refer to it.
Principle of refrigeration cycle of high and low temperature test chamber:
Refrigeration and dehumidification cycle: It is composed of an isothermal process and an adiabatic process. The process is as follows: the refrigerant is adiabatically compressed by the compressor to a higher pressure, and the exhaust gas temperature is consumed by the work. The surrounding medium exchanges heat to transfer heat to the surrounding medium. After the refrigerant passes through the shut-off valve for adiabatic expansion to do work, the refrigerant temperature decreases. Finally, the refrigerant absorbs heat isothermally from the object with a higher temperature through the evaporator, thereby lowering the temperature of the object to be cooled. This cycle is repeated to achieve the purpose of cooling.
Air circulation device: built-in air-conditioning room, circulation air duct and long-axis centrifugal fan, use efficient refrigerator and energy adjustment system, through effective heat exchange of high-efficiency fan to achieve the purpose of temperature change. By improving the blast air flow of the air, the air flow rate and the heat exchange capacity between the heater surface and the air are improved, and the temperature uniformity of the test chamber is greatly improved by adjusting the air outlet orifice;
Advantages and disadvantages of refrigeration in high and low temperature test chamber:
Reciprocating compressors are also called piston compressors. The working chamber of the compressor is the cylinder. The piston reciprocates up and down in the cylinder, thus completing the processes of compression, exhaust, expansion, and suction.
Advantages: It is widely used, the manufacturing technology is mature, the structure is simple, and the requirements for processing materials and processing technology are relatively low, the cost is relatively low, the adaptability is strong, it can adapt to a wide pressure range and cooling capacity requirements, and the maintainability is strong. Bell Test Equipment Co., Ltd. of Dongguan City
Disadvantages: higher speed cannot be achieved, the machine is large and heavy, it is not easy to achieve light weight, the exhaust is discontinuous, the air flow is prone to fluctuate, and there is greater vibration during work. Due to the above-mentioned characteristics of crankshaft connecting rod compressors, few small-displacement compressors have adopted this structure, and crankshaft connecting rod compressors are currently mostly used in large-displacement air conditioning systems for passenger cars and trucks.
Dongguan Qinzhuo Environmental Testing Equipment Co., Ltd. adheres to the use of high-performance South Korean ternary TEMI880 controllers and compressors imported from France to ensure that each high and low temperature test chamber is of high quality equipment. You are welcome to purchase.
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