The central air conditioner can function only thanks to external sources, both cold and heat. Cold water from a chiller, hot water supplied by a central heating system or a boiler, as well as freon from an external condensing unit are suitable for its operation. In addition to cooling or heating the air, the ventilation of the air conditioner, its purification and humidification is included in the operation of the central air conditioner. After this treatment, the purified air is distributed throughout the room. Today’s central air conditioners come with a certain function and are a set of standard modules.
The main section of such conditioners is the cooling section, represented in the unit as a water or freon heat exchanger. Almost always water or another non-freezing liquid that is supplied from the chiller acts as a cooler, or freon is used instead of water. But at the same time in the latter case, an external freon condenser unit will be needed.
The second section is the heating section
It is in the air conditioner can be made in two ways. The first option involves heating with a water heater, and the second option is an electric heater. The first option will require hot water from a central heating system or a boiler, which is supplied to a heat exchanger, which is a water heater.
Designed for air intake and supply it to air-conditioned rooms. Radial (centrifugal) fans, which are rotated by an electric motor through a belt transmission, are used in central air conditioners. The fan section can be located between other sections, or at the outlet of the air conditioner.
Noise control section
Designed to reduce the noise generated by the fan section. Inside the noise control section, sound-absorbing plates are installed, consisting of several layers of mineral wool or fiberglass of a specially selected density.
Moisturizing section. Air humidification is carried out in a nozzle chamber or with a steam humidifier. In the nozzle chamber, a fine water suspension is sprayed, which evaporates in the passing air. After the humidification section, as per central air conditioner reviews. it is common to install drip catchers to prevent non-evaporated droplets from entering other sections of the air conditioner.
The filtration section is designed to clean the air passing through the air conditioner from dust. If it is necessary to provide high quality filtration, the air conditioner includes two filtration sections. The primary filtration section is performed on coarse filters of class EU1 – EU3. Such filters trap up to 60% of dust. The secondary filtration section uses EU5 – EU9 class fine filters, which detain up to 90% of dust. All filters can be easily removed for cleaning or replacement. To automatically monitor the purity of the filters, differential gauges are used, measuring the pressure drop of the air at the inlet and outlet of the filter. If the filter is dirty, the pressure drop increases and the differential pressure gauge signals the need to replace the filter.
To save energy spent on heating the outside air, heat exchangers or heat exchangers are sometimes installed in air conditioners. These devices allow you to save up to 80% of energy by heating the incoming outside air due to the heat of the air removed from the room.
Heat utilizers are of three types – cross heat exchangers, rotating heat exchangers and systems with an intermediate coolant, consisting of two heat exchangers. The dimensions of the sections (usually from 0.5 x 0.5 to 2.5 x 2.5 meters) are unified and depend on the flow rate and speed of the air processed in the air conditioner. The layout of the air conditioner depends on the area and purpose of the serviced premises and is performed for each object individually.