Introduction to the composition of refrigerated truck refrigeration system and the role of each component（1）

Introduction to the composition of refrigerated truck refrigeration system and the role of each component（1）

The principle of refrigeration of general refrigerators The compressor's role is to compress the lower pressure steam into higher pressure steam, so that the volume of the steam is reduced and the pressure is increased. The compressor sucks in the lower-pressure working fluid vapor from the evaporator, increases its pressure and sends it to the condenser, where it is condensed into a higher-pressure liquid. After being throttled by the throttle, it becomes a higher pressure liquid. After the low liquid, it is sent to the evaporator, where it absorbs heat and evaporates to become a lower pressure vapor, and then is sent to the inlet of the compressor to complete the refrigeration cycle.

According to the type of condensation, air conditioners can be divided into two types: water-cooled and air-cooled. According to the purpose of use, they can be divided into two types: single-cooling and cooling and heating. No matter which type of composition, they are composed of the following main components Combination.

The main components of the refrigeration system are compressor, condenser, evaporator, expansion valve (or capillary tube, subcooling control valve), four-way valve, double valve, one-way valve, solenoid valve, pressure switch, fusing plug, output pressure regulating valve , Pressure controller, liquid storage tank, heat exchanger, heat collector, filter, dryer, automatic switch, stop valve, liquid injection plug and other components.

The main components of the electrical system are motors (for compressors, fans, etc.), operation switches, electromagnetic contactors, interlock relays, overcurrent relays, thermal overcurrent relays, temperature regulators, humidity regulators, temperature switches (defrost, prevent For freezing etc.). Compressor crankcase heater, water cut-off relay, computer board and other components.

Refrigerant controller: expansion valve, capillary tube, 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: over current relay, thermal over current 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 cutoff relay, water volume regulating 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.