PRODUCT

Tractor air conditioning module for agricultural machinery

Grain harvester air conditioner module for Agricultural machinery

Heavy equipment air conditioners

Heavy equipment air conditioners 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 (Condenser)

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.

Step 4: Evaporation (Evaporator inside cab)

Low-temp gas-liquid refrigerant enters the evaporator inside the cab air duct.

Cab hot air blows through the cold evaporator fins; the refrigerant absorbs heat from the cabin air and fully vaporizes into low-pressure low-temp gas. The air loses heat and blows out cold air to cool the cab.

The low-pressure gaseous refrigerant flows back to the compressor to start a new cycle.

2. Heating Working Principle

Heating does not use the refrigeration system, relying on the machine’s engine hot coolant:

Hot engine antifreeze flows into the heater core inside the cab evaporator assembly.
The blower forces cab air to pass through the hot heater core; air absorbs heat and becomes warm air output.
A temperature mixing damper adjusts the mixing ratio of cold and hot air to control the outlet air temperature.

3. Defrost & Demist Function

Switch to hot air mode, hot air blows onto front/rear cab glass, evaporating water mist on the glass surface to restore driving visibility.

4. Special Design Adapted to Heavy Equipment Working Conditions

Shock-resistant pipelines and fixed brackets: Adapt to severe vibration of excavators, loaders and mining vehicles.
Enhanced dustproof and waterproof structure: Block construction site dust, mud and rainwater to avoid component damage.
High heat dissipation condenser: Copes with high ambient temperature in open-air construction environments.
12V/24V DC matching design: Matches the power supply system of all construction machinery.

Product Features

Design of condenser that is not easily clogged

Advantages of Design

Professional dust-proof design

Dustproof

Equipped with a mechanically driven reciprocating compressor

Professional design

Support customer customization

Customized

Suitable vehicle models	Model	Year	Engine
General	General	General	General

Suitable vehicle models	Model	Year	Engine
General	General	General	General

Suitable vehicle models	Model	Year	Engine
General	General	General	General

Technical Specifications

Core Type	Parallel Flow / Copper Tube
Mode Options	Cooling only / Heating only / Combined
Air Outlet	Adjustable
Material	Aluminum or custom

Keywords: HVAC evaporator module, customized evaporator for machinery, compact AC core

KANGBAO Factory

Shandong Kangbao Auto Parts Co., Ltd. has obtained the intemational lATF16949 certification, establisheda com prehensive qu ality control system, and set up a Quick Response Quality Control (OROc) mechanismThrough advanced detection approaches and equipment, it ensures that the products comply with the pro-duct quality standards.

Serves global customers

Client from South Sudan

Friendly cooperation, we fully communicate and achieve cooperation, both sides technical experts on the project to fully discuss the issues.

Client from South Sudan

Friendly cooperation, we fully communicate and achieve cooperation, both sides technical experts on the project to fully discuss the issues.

Client from South Sudan

Friendly cooperation, we fully communicate and achieve cooperation, both sides technical experts on the project to fully discuss the issues.

Client from South Sudan

Friendly cooperation, we fully communicate and achieve cooperation, both sides technical experts on the project to fully discuss the issues.

PRODUCT