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5.3 Names and Main Functions of Components
No.
Name
Main Function
1
Compressor
Adjusts its own rotational speed based on the actual requirement of the system to
implement capacity control.
2
Compressor heat tape
Maintains a proper oil temperature in the compressor when the compressor is in standby
status, ensuring the reliability during compressor startup.
3
Compressor casing-top
temperature sensor
Detects a compressor's exhaust gas temperature for compressor control and protection.
4
Exhaust pipe temperature
sensor of compressor
Detects a compressor's exhaust gas temperature for compressor control and protection.
5
High-pressure circuit breaker
Protects a compressor by sending feedback signal to stop the system when the
compressor's discharge temperature exceeds the operating value of high-pressure circuit
breaker.
6
Oil extractor
Separates the gas and oil in the system to ensure compressor reliability.
7
Oil temperature sensor
Detect the oil return temperature of compressor
8
One-way valve
Prevents high-pressure gas from entering the compressor and fast balances the suction
pressure and discharge pressure in a compressor.
9
High-pressure sensor
Detects the high pressure value in the system in real time mode for compressor protection
and other control functions.
10
Four-way valve
Used for the switching between the cooling and heating functions of system IDU.
11
Heat exchanger
Used for outdoor heat exchange.
12
Fan
Strengthens heat exchanging.
13
Defrosting temperature
sensor
Used for defrosting detection.
14
Electronic expansion valve for
heating
Controls refrigerant adjustment in heating mode.
15
High height difference valve
It’s the pressure-drop device when the height difference between indoor unit and outdoor
unit is big.
16
One-way valve
Controls refrigerant flow direction.
17
Subcooler electronic
expansion valve
Controls the degree of subcooling of tube refrigerant when the system is running in
cooling mode, and reduces the capacity loss on pipes.
18
Subcooler
Controls the degree of subcooling of tube.
19
Liquid outlet temperature
sensor of subcooler
Detects tube temperature.
20
Inlet temperature sensor of
gas-liquid separator
Detects the inlet temperature of gas-liquid separator to prevent the system from running
when the refrigerant flows back to the compressor.
21
Gas outlet temperature
sensor of subcooler
Detects gas temperature of subcooler.
22
Low-pressure sensor
Detects system low pressure to avoid extra-low operating pressure.
23
Gas-liquid separator
Separate gas and liquid to prevent the system from running when the refrigerant flows
back to the compressor.
24
Outlet temperature sensor of
gas-liquid separator
Detects internal status of gas-liquid separator to further control the compressor suction
performance.
25
Liquid intake valve
Liquid intake control valve for refrigerant adjustment tank
26
Pressure valve
Pressure control valve for refrigerant adjustment tank
27
Pressure balance valve
Press control valve inside the refrigerant adjustment tank
