Refrigeration
After the liquid refrigerant absorbs the heat of the object to be cooled in the evaporator, it is vaporized into high-temperature and low-pressure steam, sucked by the compressor, compressed into high-pressure and high-temperature steam, and then discharged into the condenser. ) to release heat, condensed into high-pressure liquid, throttled by the throttle valve into low-pressure and low-temperature refrigerant, and then entered the evaporator again to absorb heat and vaporize to achieve the purpose of circulating refrigeration. In this way, the refrigerant goes through four basic processes of evaporation, compression, condensation and throttling in the system to complete a refrigeration cycle.
The main components are compressor, condenser, evaporator, expansion valve (or capillary, subcooling control valve), four-way valve, compound valve, check valve, solenoid valve, pressure switch, fuse plug, output pressure regulating valve, pressure Controller, liquid storage tank, heat exchanger, collector, filter, dryer, automatic switch, stop valve, liquid injection plug and other components.
Electric
The main components are motors (for compressors, fans, etc.), operation switches, electromagnetic contactors, interlocking relays, overcurrent relays, thermal overcurrent relays, temperature regulators, humidity regulators, temperature switches (defrosting, preventing freezing etc.). Compressor crankcase heater, water cut-off relay, computer board and other components.
Control
Consists of a number of control devices, which are.
Refrigerant controller: expansion valve, capillary, etc.
Refrigerant circuit controller: four-way valve, one-way valve, double valve, solenoid valve.
Refrigerant pressure controller: pressure switch, output pressure regulating valve, pressure controller.
Motor protector: overcurrent relay, thermal overcurrent relay, temperature relay.
Temperature regulator: temperature position regulator, temperature proportional regulator.
Humidity Regulator: Humidity level regulator.
Defrost controller: defrost temperature switch, defrost time relay, various temperature switches.
Cooling water control: water cut-off relay, water volume control valve, water pump, etc.
Alarm control: over-temperature alarm, over-humidity alarm, under-voltage alarm, fire alarm, smoke alarm, etc.
Other controls: indoor fan speed controller, outdoor fan speed controller, etc.