supermarket refrigerated showcase » article > display refrigerator > The basic structure of the display cooler middle-shell coil type regenerator
The basic structure of the display cooler middle-shell coil type regenerator
The basic structure of the display cooler middle-shell coil type regenerator.
For small fluorine display cooler refrigeration systems, the liquid supply pipe and the return gas pipe are often tied together or welded together to form the simplest regenerator. The selection of the regenerator must meet two conditions: one is that the gas flow rate in the shell should be 8~12m/s (too low flow rate will cause lubricating oil to deposit in the shell), and the other is that the heat transfer area should be able to meet the given Working conditions.
evaporation-condenser
evaporation-condenser is used in a cascade refrigeration system in which the refrigerant on the high temperature side vaporizes and absorbs heat, and the refrigerant on the low temperature side releases heat and condenses in it, so it is called an evaporator condenser. There are three basic structural forms of the evaporator-condenser: vertical shell and tube, vertical coil or horizontal and sleeve type. Shell and tube vertical and coil vertical evaporator-condenser structures. Generally, the high temperature side refrigerant liquid vaporizes and absorbs heat in the straight tube and the coil tube, and the low temperature side gas refrigerant releases heat and condenses in the tube shell. In order to improve the heat exchange efficiency, the two refrigerants mostly flow in reverse, and the heat transfer temperature difference between the high and low temperature sides is generally 5-10 ℃. The heat transfer coefficient of the evaporator-condenser is 460~520W/ (m2.K). The structure of the double-pipe evaporator-condenser is similar to that of the double-pipe condenser, which is formed by bending two steel pipes with different diameters. Low temperature display cooler The refrigerant liquid vaporizes and absorbs heat between the tubes, and the high temperature refrigerant vapor releases heat and condenses in the small tubes. The double-pipe evaporative condenser is only used for small low-temperature equipment.
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