Programmable Environmental Temperature And Humidity Chamber Operation Note Points

High And Low Temperature Test Chamber Refrigeration System

The single-stage vapor compression refrigeration system consists of four basic components: a refrigeration compressor, a condenser, a throttling valve, and an evaporator. They are connected by pipes in turn to form a closed system. The refrigerant continuously circulates in the system, changes in state occur, and exchanges heat with the outside world.
The liquid refrigerant absorbs the heat of the cooled object in the evaporator, vaporizes into low temperature and low pressure steam, is sucked by the compressor, is compressed into high pressure and high temperature steam, is discharged into the condenser, and flows into the cooling medium (water or air) in the condenser. ) Exothermic, condensing into high-pressure liquid, throttling the throttle valve to low-pressure and low-temperature refrigerant, re-entering the evaporator to absorb heat and vaporizing, and achieving the purpose of circulating cooling. In this way, the refrigerant completes a refrigeration cycle through four basic processes of compression, condensation, throttling, and evaporation in the system.
In the refrigeration system, the evaporator, the condenser, and the compressor are the four essential parts of the refrigeration system. The evaporator is the equipment that delivers the cooling capacity. The refrigerant absorbs the heat of the object being cooled to achieve refrigeration. The compressor is the heart and acts as a suction, compression, and refrigerant vapor. The condenser is a device that emits heat, transferring the heat absorbed in the evaporator together with the heat converted by the work performed by the compressor to the cooling medium. The throttle valve acts as a throttling and depressurizing action for the refrigerant, simultaneously controls and regulates the quantity of the refrigerant liquid flowing into the evaporator, and divides the system into two parts, the high pressure side and the low pressure side. In the actual refrigeration system, in addition to the above four major parts, there are often auxiliary devices such as solenoid valves, distributors, dryers, collectors, fusible plugs, pressure controllers, etc., which are designed to improve operation. Economical, reliability and security are set.

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