Temperature Cycle Testing Chamber The main components in the refrigeration system are composed of expansion valves, compressors, condensers and evaporators to complete the entire cooling operation of the equipment.
As early as 1834 in the United States J. Perkins in the closed system using volatile ether liquid vaporization refrigeration, and from the patent. This unit consists of a manual compressor, a water-cooled condenser and an evaporator contained in a liquid cooler. In the same year, the British L.W. Wright on the use of compressed air expansion method of ice machine to be studied and achieved a successful effect. Ten years later, a US physician, J. Gori, first applied the air-type compression chillers he developed in commercial refrigeration and air conditioning.
Then in 1855 the French F. Carrey successfully designed the sulfur dioxide absorption type in the ammonia absorption chiller. He spent four years to design a use of ammonia as a refrigerant, water as an absorbent ice machine. In 1890, steam injection and mechanical vapor compression refrigeration equipment have been the actual use of absorption refrigeration equipment also began to spread.
In the early stage of high and low temperature test chamber mechanical refrigeration, because of its large equipment, low prices and low efficiency, so that the use of mechanical refrigeration is limited. In 1930, the refrigeration industry was slowly moving towards miniaturization, higher efficiency, and the use of new safe refrigerant era and the development of sub-horsepower (less than 1 horsepower) of the motor, so as to help the rapid development of the refrigeration industry.
