Roof mounted air conditioning unit supplier

Zhongyou/EveryoneThe rooftop air conditioning system is an all air system with an integrated design that does not require supporting equipment such as water pumps, cooling towers, fan coil units, or condensate drainage pipes. It is extremely convenient to install and use. The system has no moving machinery or water pipes indoors, so users do not need to worry about noise and water leakage, and maintenance is convenient.Roof mounted air conditioningThe unit is placed on the roof or outdoor open space, without the need for a computer room, saving initial investment. The unit does not require secondary refrigerant, and the system efficiency is high. The unit is fully functional and can easily achieve various functions such as air purification, dehumidification, humidification, cooling, heating, and fresh air volume adjustment. The unit is suitable for both shopping malls, catering, entertainment, office buildings, clubs, and general industrial workshops, as well as clean spaces in industrial workshops such as pharmaceuticals, food, electronics, chemicals, scientific research, and machinery.

The heating methods of rooftop air conditioning units include:heat pumpHeating, electric heating, steam heating, hot water heating, gas heating, etc; Humidification methods: electrode humidification, dry steam humidification, electric heating humidification, high-pressure mist humidification, wet film humidification, etc. The unit can add a flow equalization section, a medium efficiency filtration section, a noise reduction section, and an air outlet section. Generally speaking, conventional units installed on rooftops are equipped with horizontal return air and horizontal supply air, including side return air and end supply air; End return air, end supply air; Other air supply and return methods: side return air, bottom supply air; Bottom return air, end supply air, etc.

The national standard for rooftop air conditioning units is GB/T20738-2006 "Rooftop Air Conditioning Units".

Working Principle:

Cooling mode:
The outdoor side fin heat exchanger serves as the condenser, while the indoor side fin heat exchanger serves as the evaporator. The high-temperature refrigerant gas discharged from the compressor is condensed into liquid in the outdoor side fin heat exchanger, and then throttled and depressurized by the expansion valve to form a low-temperature gas-liquid mixture. It then flows into the indoor side fin heat exchanger, absorbs heat, evaporates, and returns to the compressor, completing a refrigeration cycle; At the same time, the return air (or fresh air) from indoors is cooled and cooled by the indoor side fin heat exchanger (in this case, the evaporator), and the processed cold air is then sent into the room by the indoor side fan.

Heating mode:
The outdoor side fin heat exchanger serves as the evaporator, while the indoor side fin heat exchanger serves as the condenser. The high-temperature refrigerant gas discharged from the compressor is condensed into liquid in the indoor side fin heat exchanger, and then throttled and depressurized by the expansion valve to form a low-temperature gas mixture. It then flows into the outdoor side fin heat exchanger to absorb heat and evaporate before returning to the compressor, completing a refrigeration cycle; At the same time, the return air (or fresh air) from indoors is heated and heated by the indoor side fin heat exchanger (in this case, the condenser), and the processed hot air is then sent into the room by the indoor side fan.

Unit characteristics:

1. Wide applicability:
This series of products includes varieties such as constant humidity, cooling and heating, and heat pumps. Constant temperature and humidity units can meet high temperature and humidity requirements, cooling and heating units can meet comfort requirements, and heat pump units can be used in one machine to save heating operating costs.

2. Save investment:
The unit is placed on the roof or outdoor open space, without the need for a computer room, saving effective space. The unit does not require supporting equipment such as water pumps, cooling towers, fan coil units, etc., saving initial investment.

3. Easy installation:
The unit does not require on-site preparation of refrigerant pipes, cooling water pipes, air pipes, and power connections to be used, saving on-site construction time and costs.

4. Efficient and energy-saving:
High performance scroll or screw compressors are used for stable operation of the unit, with high volumetric efficiency and energy efficiency. The screw compressor can easily achieve four stage or stepless adjustment, and has high partial load efficiency; Expansion valves, filters, solenoid valves and other refrigeration accessories are all selected from imported brands such as the United States and Italy; The unit also does not require secondary refrigerant, resulting in high system efficiency.

5. Running quietly:
The unit adopts high-performance vortex or screw compressors, which operate smoothly. The unit is located outdoors and only requires air ducts indoors, resulting in low indoor noise.

6. Structure *:
The top plate of the unit adopts a special structure to ensure that the unit does not enter water. The door panel is made of polyurethane foam to ensure thermal insulation performance. The electrical box adopts a sealed structure to ensure electrical safety. The power wiring is placed inside the electrical box, so there is no risk of roof leakage.

7. Safe operation:
The unit is equipped with high voltage, low voltage, overload, short circuit, phase failure, overheating, underwind pressure and other protections, as well as fire damper interlock protection.

8. Intelligent control:
The unit adopts good control instruments, which can be equipped with dual hand controllers and are located in the outdoor unit and indoor control room, making operation very convenient. The instrument is equipped with RS485 interface, which can achieve remote control.

9. Convenient function expansion:
The unit is equipped with multiple functional sections, which can conveniently achieve functions such as air cooling, dehumidification, heating, humidification, filtration, and fresh air exchange.

WKLF120Technical parameters of rooftop air conditioning unit

Note:

1. Refrigeration nominal operating conditions: indoor return air dry bulb temperature of 27 ℃, wet bulb temperature of 19 ℃; The outdoor ambient air dry bulb temperature is 35 ℃.

2. Heating nominal operating conditions: indoor return air dry bulb temperature of 20 ℃, hot water inlet temperature of 90 ℃; The steam pressure is 0.2MPa.

3. Choose any heating method from electric heating, hot water heating, or steam heating; Hot water and steam heating require additional electric control valves.

4. When the unit is cooling, the ambient temperature should not be lower than 18 ℃. If there are any requirements, they should be clearly stated when ordering.

5. Specifications and parameters may not be notified separately due to product improvements or updates.

Configuration table of air-cooled direct expansion unit