Refrigeration unit of high and low temperature test chamber

[yanyan]

I believe that friends who have been in contact with the environmental protection testing industry know that as long as it is about low temperature tests, such as high and low temperature test boxes, constant temperature and humidity test boxes, cold and heat shock test boxes and other equipment, as long as the temperature range of the test is lower than normal temperature (prepared to be defined in 20℃), you need to use refrigeration accessories, maybe we have the same brand or even the power of the compressor. The high and low temperature test chamber is a common temperature test equipment in environmental test equipment, which is suitable for high temperature and low temperature reliability tests of industrial products. The constant temperature and humidity test box has a wide temperature control range, and is suitable for the adaptability test of electrician, electronic products, components, and other materials in the storage, transportation and use of temperature and humidity in a comprehensive environment.

Used in product design, improvement, appraisal and inspection. The walk-in high and low temperature laboratory is used in the aerospace, automotive and parts industries, electronic components, plastics, chemicals and related products for heat and cold resistance testing, providing the industry with large-scale temperature and humidity testing of large parts, semi-finished products and finished products The environmental space is suitable for testing equipment with a large amount of products and large volume.

The compressor is a driving fluid machine that promotes low-pressure gas to high-pressure gas. It is the core of the refrigeration system. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and then discharges the high-temperature and high-pressure refrigerant gas into the exhaust pipe to provide power for the refrigeration cycle, thereby achieving compression→condensation ( The refrigeration cycle of heat release)→expansion→evaporation (heat absorption).

Compressors are classified into piston compressors, screw compressors, and centrifugal compressors. Piston compressors are generally composed of shells, motors, cylinders, pistons, control technology equipment (starters and thermal protectors) and cooling processing systems. There are two cooling modes: oil cooling and natural environment cooling (Note: now The natural selection cooling type used in the test chamber industry), the refrigeration unit is regarded as the heart of the refrigeration operating system of the high and low temperature test chamber, and the special network term that can best directly express the structural characteristics of the compressor can be called "steam pump".


The actual responsibility of compressor development is to increase the pressure of the enterprise, and refer to the state of suction time pressure management to the state of life of discharge pressure. There are five types of compressors used in the refrigeration and air-conditioning engineering industry: reciprocating, screw, and Rotary type, scroll type and centrifugal type, of which reciprocating type is the most widely used compressor in small and medium-sized commercial refrigeration functional systems. Screw compressors are mainly used in some large-scale commercial and industrial production systems.

Rotary compressors, scroll compressors, and reciprocating compressors are mainly used in domestic and small-capacity commercial air-conditioning installations in China, while centrifugal compressors are widely used in the air-conditioning business systems of other large commercial buildings. Type compressors generally need to be classified according to the formalism of different compressor housings and the teaching methods set up between innovation-driven financial institutions. According to the shell form, there are open and closed semi-hermetic compressors. Closed type means that the entire compressor is arranged in a shell.

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