Rooftop air conditioning units, also known as large space cooling and heating air conditioning units, are large and medium-sized integrated air conditioning equipment with self-contained cold source and air cooling. They are widely used in various large and medium-sized factories, workshops, and places that need to adjust temperature, humidity and cleanliness.

 

I. Basic Overview

 

1.1 Definition and Type:

 

Rooftop air conditioning units are integrated air conditioning equipment that assembles functions such as refrigeration, heating, humidification, air supply, air purification, and electrical control in a horizontal box. According to its functional characteristics, it can be divided into single cooling type, electric heating type, constant temperature and humidity type, constant temperature and humidity clean type, heat pump type and other types.

 

1.2 Installation location:

 

It is named because it is mostly installed on the roof, but in fact it can also be installed on the outdoor site around the air-conditioned room. This installation method does not take up valuable indoor space and can reduce indoor noise when the unit is running.

 

2. Working Principle

 

The working principle of the rooftop air conditioning unit mainly includes the following steps:

 

2.1 Air filtration:

 

Air is inhaled through the air filtration system, and dust and other impurities in the air are effectively filtered out to ensure that the air entering the equipment is clean.

 

2.2 Air cooling or heating:

 

The filtered air is inhaled into the heat exchanger and cooled or heated through the heat exchange process to meet the needs of indoor temperature regulation. Cooling is usually achieved through refrigerant circulation, while heating may be achieved through heat sources such as electric heating elements and hot water.

 

2.3 Air noise reduction and pressure increase:

 

The air after heat exchange enters the middle of the equipment for noise reduction and pressure increase treatment to reduce the noise during air flow and increase the air pressure to ensure that the air can be evenly distributed to all corners of the building.

 

2.4 Air distribution:

 

The air after noise reduction and pressure increase treatment is efficiently distributed to various spaces in the building through high-efficiency air distributors to ensure uniform temperature distribution in the space.

 

2.5 Heat recovery (in heating mode):

 

The equipment can also effectively recover the heat accumulated at the top of the space, reduce the heat loss through the roof, and thus save energy.

 

III. Features and advantages

 

3.1 Compact structure:

 

The unit has a compact structure, comes with its own cold and heat source and air cooling system, does not require an additional cooling water system, and is easy to install.

 

3.2 Efficient and reliable:

 

The refrigeration system is efficient and reliable, and the condenser and evaporator are mostly made of copper tubes with aluminum fins, which have high heat transfer efficiency. The unit has full computer control and a high degree of automation.

 

3.3 Strong adaptability:

 

The unit takes into account anti-corrosion, anti-exposure, anti-rainstorm and other measures in structure and surface area treatment, and can be installed on the roof or outdoor platform. According to the specific requirements of the environment where the unit is used, it can also be treated with explosion-proof and anti-corrosion.

 

3.4 Diverse functions:

 

In addition to the basic cooling and heating functions, humidification, exhaust, heat recovery, return air bypass and other functional options can also be selected according to needs.

 

IV. Applications

 

Rooftop air conditioning units are not only suitable for comfortable air-conditioning places such as stadiums, lecture halls, exhibition centers, theaters, shopping malls, railway stations, airports, etc., but are also widely used in process air-conditioning places such as machinery, aerospace, medicine, electronics, and chemicals.