Rooftop air conditioning unit

Zhongyou/ ZhongyouThe roof type air conditioning system is an all-air system, and the whole air conditioning system is integrated design, without pumps, cooling towers, fan coils and other supporting equipment, and without condensate drainage pipes, which is extremely convenient to install and use。There is no moving machinery and water pipes in the system room, and users do not need to worry about noise and water leakage, and maintenance is convenient。Rooftop air conditionerThe unit is placed on the roof or outdoor open space, without the need for a computer room, saving the initial investment。The unit does not need secondary refrigerant, and the system efficiency is high。The unit has full functions, which can conveniently achieve air purification, dehumidification, humidification, cooling, heating, fresh air volume regulation and other functions。The unit is suitable for shopping malls, restaurants, entertainment, office buildings, halls and general industrial workshops, and is also suitable for medicine, food, electronics, chemical, scientific research, machinery and other industrial workshop clean places。

The heating methods of rooftop air conditioning units include:热泵Heating, 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 increase the flow sharing section, medium efficiency filtration section, muffling section and air outlet section。Generally speaking, the conventional units located on the roof are horizontal return air, horizontal air supply: side return air, end air supply;End return air, end supply air;Other delivery and return air modes: side return air, bottom air supply;Bottom return air, end air supply, etc。

National standard for rooftop air conditioning units: GB/T20738-2006 "Rooftop Air conditioning Units"。

How it works:

Cooling mode:
　　The outdoor side fin heat exchanger acts as a condenser，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，The low temperature gas-liquid mixture is formed through the throttle and pressure reduction of the expansion valve，Then it flows into the indoor side fin heat exchanger，The absorbed heat evaporates and returns to the compressor，完成一个制冷循环; 同时，The return air (or fresh air) from the room is cooled after passing through the side fin heat exchanger (this is the evaporator)，The treated cold air is sent into the room by the indoor side fan。

Heating mode:
　　The outdoor side fin heat exchanger serves as the evaporator，The indoor side fin heat exchanger acts as a condenser，The high-temperature refrigerant gas discharged from the compressor condenses into liquid in the indoor side fin heat exchanger and becomes a low-temperature gas mixture after being throttled and reduced by the expansion valve，Then flow into the outdoor side fin heat exchanger to absorb heat evaporation and return to the compressor，Complete a cooling cycle;meanwhile，The return air (or fresh air) from the room is heated after passing through the indoor side fin heat exchanger (this is the condenser)，The hot air after treatment is sent into the room by the indoor side fan。

Unit features:

1. Wide range of application:
The series of products have constant humidity, heating and cooling, heat pump and other varieties, constant temperature and humidity type units can meet the requirements of high temperature and humidity places, heating and cooling units can meet the comfort of the place, heat pump type units can be used for one machine, saving heating operation costs。

2. Save on 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 need pumps, cooling towers, fan coils and other supporting equipment, saving the initial investment。

3. Easy to install:
The unit does not need to be equipped with refrigeration media pipe and cooling water pipe on site, equipped with air pipe and connected to the power supply, which can be used, saving site construction time and cost。

4. High energy efficiency:
Unit stabilization with high-performance scroll or screw compressor, high volumetric efficiency and energy efficiency ratio, screw compressor can easily achieve four or stepless adjustment, partial load efficiency is high;Expansion valve, filter, solenoid valve and other refrigeration accessories are selected to use the United States, Italy and other imported brands;The unit also does not need secondary refrigerant, and the system efficiency is high。

5. Quiet operation:
The unit adopts high-performance scroll or screw compressor, which runs smoothly。The unit is placed outdoors, indoor only need to be equipped with air pipes, and indoor noise is small。

6. 结构*：
The unit roof adopts a special structure to ensure that the unit does not enter water, the door panel adopts polyurethane foam to ensure thermal insulation performance, the electrical box adopts a sealed structure to ensure electrical safety, and the power connection is placed in the electrical box without the roof leakage hazard。

7. Operation safety:
The unit is equipped with high pressure, low pressure, overload, short circuit, phase break, overheating, low wind pressure and other protection, as well as fire valve chain protection。

8. Intelligent control:
The unit adopts a good control instrument, the instrument can be equipped with a hand operator, divided into outdoor units and indoor control rooms, the use of operation is very convenient。The instrument is equipped with RS485 interface for remote control。

9. Function expansion is convenient:
The unit is equipped with a variety of functional segments, which can conveniently achieve air cooling, dehumidification, heating, humidification, filtration, and fresh air ventilation。

WKLF060Technical parameters of roof type air conditioning unit

注：

1.Nominal cooling conditions: indoor return air dry bulb temperature 27℃, wet bulb temperature 19℃;Outdoor dry bulb temperature 35℃。

2.Nominal heating conditions: indoor return air dry bulb temperature 20℃, hot water inlet temperature 90℃;Steam pressure 0.2MPa。

3.Heating method in electric heating, hot water heating, steam heating to choose one;Hot water and steam heating need to be equipped with an electric regulating valve。

4.The ambient temperature of the unit refrigeration should not be lower than 18 ° C, and it should be clear when ordering if required。

5.Specifications may be modified or updated without prior notice。

Air cooled direct expansion unit configuration table