Sales of refrigeration accessories

Air conditioning refrigeration accessories, abbreviated as "cold accessories", refer to air conditioning refrigeration spare parts and components, which are the basic components of air conditioning refrigeration equipment.

　　Xining RefrigerationWorking principle of accessories

The working principle of refrigeration refers to the compressor compressing low-pressure steam into high-pressure steam, reducing the volume of steam and increasing the pressure. The compressor sucks in the lower pressure working fluid vapor from the evaporator, increases its pressure, and sends it to the condenser, where it condenses into a higher pressure liquid. After being throttled by a throttle valve, it becomes a lower pressure liquid and is sent to the evaporator, where it absorbs heat and evaporates into lower pressure vapor, which is then sent to the inlet of the compressor to complete the refrigeration cycle.

The evaporator is an important component among the four major refrigeration parts. Low temperature condensed gas passes through the evaporator, exchanges heat with the outside air, vaporizes and absorbs heat, achieving the cooling effect.

The evaporator consists of two parts: a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation to the liquid, promoting boiling and vaporization of the liquid; The evaporation chamber completely separates the gas-liquid phase. The vapor generated in the heating chamber contains a large amount of liquid foam, which can be separated from the vapor through self aggregation or the action of a demister in a larger evaporation chamber. Usually, the demister is located at the top of the evaporation chamber.

Evaporators are classified into three types based on operating pressure: atmospheric pressure, pressurization, and depressurization. According to the motion of the solution in the evaporator, there are: ① circulation type. Boiling solution passes through the heating surface multiple times in the heating chamber, such as central circulation tube type, suspended basket type, external heating type, Levin type, and forced circulation type. ② One way type. Boiling solution passes through the heating surface in the heating chamber without circulating, and the concentrated solution is discharged immediately, such as rising film, falling film, stirring film, and centrifugal film. ③ Direct contact type. Heating medium and solution directly contact for heat transfer, such as immersion combustion evaporator. During the operation of the evaporation device, a large amount of heating steam is consumed. To save heating steam, multi effect evaporation devices and steam recompression evaporators can be used. Five ring refrigeration shell and tube evaporators are widely used in chemical, light industry, petroleum and other sectors.