Heavy equipment air conditioner adopt the vapor compression refrigeration cycle, consisting of four core components: compressor, condenser, expansion valve, evaporator, plus refrigerant as heat transfer medium. The whole process is divided into 4 stages: compression → condensation → throttling expansion → evaporation, circulating repeatedly to realize cooling.
Step 1: Compression (Compressor)
Driven by the construction machine engine belt or independent DC motor, the compressor sucks low-temperature low-pressure gaseous refrigerant from the evaporator, compresses it into high-temperature high-pressure gas.
- For engine-driven AC: The compressor clutch engages when cooling is turned on, powered by the engine.
- For electric parking AC: 12V/24V DC compressor runs independently off vehicle batteries when the engine stops.
Step 2: Condensation(Heavy equipment air conditioners)
High-temp high-pressure gaseous refrigerant flows into the condenser installed outside the cab (usually mounted on the machine side/radiator).
External strong fan blows ambient air over the condenser fins, taking away heat from the refrigerant. The refrigerant releases heat and condenses into high-temperature high-pressure liquid refrigerant.
A receiver drier is fitted here to filter impurities and absorb moisture in the refrigerant, preventing pipeline ice blockage.
Step 3: Throttling Expansion (Expansion Valve)
High-pressure liquid refrigerant passes through the tiny orifice of the expansion valve. The space suddenly expands, the pressure and temperature of the refrigerant drop sharply, turning into low-temperature low-pressure gas-liquid mixture.
The expansion valve also automatically adjusts refrigerant flow according to cab temperature to control cooling capacity.
Kangbao: Heavy equipment air conditioners in China
Founded in 2011 in Shandong, China, Kangbao has grown into a reliable partner for global OEMs. Our advanced production facilities and annual capacity of 300,000 units allow us to serve clients of all scales.
Global Partnerships and Service
Kangbao has established long-term relationships with leading Heavy equipment air conditioners OEMs in China and abroad. Our products are exported to markets in Turkey, Russia, South Africa, and beyond.
We support flexible trade terms (FOB, CIF, DDP) and provide reliable after-sales service, ensuring global clients receive consistent quality and support throughout the product lifecycle.
Contact KANGBAO
Kangbao is your reliable partner for Heavy equipment air conditioners.
E-mail: info@kbairconditioner.com
