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Cooling Mode:
The outdoor finned heat exchanger acts as the condenser, while the indoor finned heat exchanger acts as the evaporator. The high-temperature refrigerant gas discharged from the compressor condenses into liquid in the outdoor finned heat exchanger. It then passes through the expansion valve, where it is throttled and depressurized into a low-temperature gas-liquid mixture. This mixture flows into the indoor finned heat exchanger, absorbs heat and evaporates, before returning to the compressor, thus completing one refrigeration cycle. Simultaneously, the return air (or fresh air) from indoors passes over the indoor finned heat exchanger (acting as the evaporator), is cooled, and the treated cool air is then supplied back into the room by the indoor fan.

Heating Mode:
The outdoor finned heat exchanger acts as the evaporator, while the indoor finned heat exchanger acts as the condenser. The high-temperature refrigerant gas discharged from the compressor condenses into liquid in the indoor finned heat exchanger. It then passes through the expansion valve, where it is throttled and depressurized into a low-temperature gas mixture. This mixture flows into the outdoor finned heat exchanger, absorbs heat and evaporates, before returning to the compressor, thus completing the cycle. Simultaneously, the return air (or fresh air) from indoors passes over the indoor finned heat exchanger (acting as the condenser), is heated, and the treated warm air is then supplied back into the room by the indoor fan.

Unit Features:

1. Wide Range of Applications:
   The product series includes constant humidity, cooling/heating, and heat pump models. Constant temperature and humidity units meet the requirements of environments with high demands for temperature and humidity control. Cooling/heating units are suitable for comfort conditioning applications. Heat pump models offer dual functionality (heating and cooling), saving on heating operational costs.

2. Cost-Effective Investment:
   The unit is installed on the roof or outdoor open space, requiring no dedicated equipment room, thus saving valuable indoor space. It eliminates the need for ancillary equipment such as water pumps, cooling towers, and fan coil units, reducing initial investment.

3. Easy Installation:
   The unit requires no on-site installation of refrigerant piping or cooling water piping. Simply connect the air ducts and power supply, and it is ready for operation, saving significant on-site construction time and costs.

4. High Efficiency and Energy Saving:
   The unit stably uses high-performance scroll or screw compressors, which offer high volumetric efficiency and energy efficiency ratios. Screw compressors can easily achieve four-stage or stepless capacity control, ensuring high efficiency even under partial load. Refrigeration components such as expansion valves, filters, and solenoid valves are selected from leading international brands (e.g., American, Italian). The system also requires no secondary refrigerant, contributing to high overall system efficiency.

5. Quiet Operation:
   The unit utilizes high-performance scroll or screw compressors for smooth and quiet operation. Installed outdoors, it requires only air ducts indoors, resulting in low indoor noise levels.

6. Unique Structure:
   The unit's top panel features a special design to ensure it is waterproof. Door panels are insulated with polyurethane foam to ensure excellent thermal insulation. The electrical cabinet is sealed for electrical safety, and power wiring is housed within the cabinet, eliminating concerns about roof leaks affecting connections.

7. Safe Operation:
   The unit is equipped with multiple protective features including high-pressure, low-pressure, overload, short-circuit, phase-loss, overheating, and low air pressure protection, as well as interlock protection with fire dampers.

8. Intelligent Control:
   The unit employs an advanced control system. The controller can be equipped with dual handheld operators, placed at the outdoor unit and the indoor control room respectively, for convenient operation. The controller is equipped with an RS485 interface, enabling remote monitoring and control.

9. Easy Function Expansion:
   The unit can be configured with various functional sections, allowing for easy implementation of air cooling, dehumidification, heating, humidification, filtration, and fresh air ventilation functions.