Common air conditioning host

Common air conditioning host 1. Water-cooled chiller The water-cooled chiller belongs to the refrigeration unit part in the central air-conditioning system. Its refrigerant is water, which is called the chiller, and the cooling of the condenser is realized by the heat exchange of normal temperature water. Therefore, it is called a water-cooled unit, and the water-cooled unit is called an air-cooled unit. The condenser of the air-cooled unit is cooled by heat exchange with the outdoor air to achieve the purpose of refrigeration. 2. VRV system The VRV system is a variable refrigerant flow system. Its form is a group of outdoor units, which are composed of functional machines, constant speed machines and frequency converters. By connecting the outdoor unit system in parallel, the cooling pipes are concentrated into one pipe system, which can be conveniently matched according to the capacity of the indoor unit. A maximum of one indoor unit can be connected to 30 indoor units. The minimum capacity of an indoor unit is 0.6KW and the maximum is 3.75KW. The capacity of the indoor unit can be adjusted within 50% to 130% of the capacity of the outdoor unit. 3. Module machine Based on the development of the VRV system, the modular machine changed the traditional Freon pipeline into a waterway system, combined the indoor and outdoor units into a refrigeration unit, and changed the indoor unit to a fan coil. The heat exchange of the coolant water is used to realize the refrigeration process. The modular machine got its name because it can automatically adjust the number of start-up units according to the cooling load requirements and realize flexible combination. 4. Piston chiller The piston chiller is an integrated refrigeration device designed for the cooling purpose of air conditioning, which is a compact assembly of the piston refrigeration compressor and auxiliary equipment and accessories required for the refrigeration cycle. Piston chiller unit cooling from 60 to 900KW, suitable for small and medium projects. 5. Screw chiller Screw chillers are large and medium-sized refrigeration equipment that provides chilled water. Commonly used for air conditioning in national defense scientific research, energy development, transportation, hotels, restaurants, light industry, textiles and other departments, as well as chilled water for water conservancy and power engineering. Screw chiller is a complete refrigeration system composed of screw refrigeration compressor unit, condenser, evaporator, automatic control components and instruments. It has the advantages of compact structure, small size, light weight, small footprint, convenient operation and maintenance, smooth operation and so on, so it has been widely used. Its stand-alone refrigeration capacity is from 150 to 2200KW, suitable for medium and large projects. 6. Centrifugal chiller Centrifugal chiller is a complete chiller composed of centrifugal refrigeration compressor, matching evaporator, condenser, throttle control device and electric meter. The cooling capacity of a single machine is from 700 to 4200KW. It is suitable for large and extra large projects. 7. Lithium bromide absorption chiller Lithium bromide absorption chillers use heat as power, water as refrigerant, and lithium bromide solution as absorbent to produce refrigerant water above 0 ℃, which can be used as a cooling source for air conditioning or production processes. There are three types of power: direct combustion type, steam type and hot water type. Its cooling capacity ranges from 230 to 5800KW, which is suitable for medium, large and extra large projects.

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