central air-conditioning

DESCRIPTION

refrigeration system

The refrigeration technology for air conditioning belongs to the scope of ordinary refrigeration, mainly using liquid vaporization refrigeration method. (Mainly utilizing the absorption ratio of liquid vaporization process)latent heatMoreover, the boiling point of liquids varies depending on their pressure,pressureThe lower,boildropThe lower According to the different ways in which heat is transferred from high-temperature objects to low-temperature objects, it can be divided into vapor compression refrigeration and absorption refrigeration.

Ice storagesystem principle

Ice storage system is a system that uses discounted electricity prices to produce ice using electric refrigeration and air conditioning units during low electricity demand periods, and stores it in ice storage equipment; During the day when the power load is high, avoid peak electricity prices and stop or intermittently operate the electric refrigeration air conditioning unit to release the stored cooling capacity of the ice storage equipment to meet the needs of the building's air conditioning load.

Working principle

refrigeration principle

Liquid vaporization refrigeration utilizes the heat absorption during liquid vaporization and the heat release during condensation to achieve refrigeration. Liquid vaporizes to form steam.

When the refrigerant is in a closed container, there are no other gases in the container except for the liquid and the vapor generated by the liquid itself. The liquid and vapor will reach equilibrium at a certain pressure, and the vapor at this point is called saturated vapor, the pressure is called saturation pressure, and the temperature is called saturation temperature. At equilibrium, the liquid no longer vaporizes. If a portion of the vapor is extracted from the container, the liquid must continue to vaporize to produce a portion of the vapor to maintain this equilibrium. When a liquid vaporizes, it absorbs heat, which is called latent heat of vaporization. The latent heat of vaporization comes from the cooled object, causing it to cool down. In order for this process to continue, it is necessary to continuously extract steam from the container, condense it into a liquid, and then return it to the container. If the steam extracted from the container is directly condensed into steam, the temperature of the required cooling medium is lower than the evaporation temperature of the liquid. We hope that the condensation of the steam is carried out at room temperature, so we need to increase the pressure of the steam to the saturation pressure at room temperature.

The refrigerant will evaporate at low temperature and low pressure, producing a cooling effect; And condense at room temperature and high pressure, releasing heat to the surrounding environment or cooling medium. Steam condenses into high-pressure liquid at room temperature and high pressure, and its pressure needs to be reduced to the evaporation pressure before it can enter the container.

The liquid vaporization refrigeration cycle consists of four processes: refrigerant vaporization, steam boosting, high-pressure steam condensation, and high-pressure liquid depressurization.

Heating principle

The compressor sucks in low-pressure gas and compresses it into high-temperature and high-pressure gas. The high-temperature gas is heated by a heat exchanger, and at the same time, it condenses into liquid. The liquid enters the evaporator again for evaporation, （evaporatorDuring evaporation, there must also be a heat exchange medium, and the model and structure of the machine vary depending on the heat exchange medium used. The commonly used ones are air cooling and ground source After passing through the evaporator, the liquid becomes a low-pressure low-temperature gas, which is then sucked into the compressor for compression. Just keep circulating like this, and the circulating water on the air conditioning side will become45-55Hot water at around the temperature. Hot water is sent through pipelines to rooms that require heating, and the rooms are equipped with fan coil units to exchange heat between hot water and air for heating purposes.

Working principle of water system

Water cooled central air conditioning consists of four major components: compressor, condenser, throttling device, and evaporator. The refrigerant circulates in the above four components in sequence. The refrigerant (refrigerant) produced by the compressor is a high-temperature and high-pressure gas that flows through the condenser to cool down and reduce pressure. The condenser carries heat to the cooling tower through the cooling water system and discharges it. The refrigerant continues to flow through the throttling device, becoming a low-temperature and low-pressure liquid that flows through the evaporator, absorbs heat, and is then compressed. There is a chilled water circulation system connected at both ends of the evaporator. The heat absorbed by the refrigerant in this process lowers the temperature of the chilled water, allowing the low-temperature water to flow to the user end, and then through the fan coil for heat exchange, blowing out the cold air.

Working principle of wind system

The transmission method of fresh air adopts displacement instead of the internal circulation principle of air conditioning gas and the unhealthy practice of mixing new and old gases. Fresh outdoor air will be automatically sucked into the room through negative pressure, and when it enters the room through the fresh air outlet installed on the bedroom, living room or window, it will automatically remove dust and filter. At the same time, a circulation system consisting of corresponding indoor pipelines connected to exhaust vents in several functional rooms will take away indoor exhaust gases and concentrate them at the exhaust vents“exhalation”The discharged exhaust gas is no longer recycled, and the old and new air forms a good cycle.

Working principle of coil system

The working principle of a fan coil air conditioning system is to continuously circulate indoor air through the fan coil unit, cooling or heating it through the coil to maintain the required temperature and relative humidity of the room. The cold or hot water used by the coil is supplied by a centralized cold and heat source. At the same time, the fresh air processed by the fresh air conditioning room is sent to each air-conditioned room through specialized fresh air ducts to meet the hygiene requirements of the air-conditioned rooms.

Compared with centralized systems, fan coil air conditioning systems do not have large air ducts, only water pipes and smaller fresh air ducts. They have the advantages of easy layout and installation, small building space occupation, and good individual adjustment. They are widely used in comfort air conditioning systems with low temperature and humidity accuracy requirements, multiple rooms, small rooms, and the need for separate control

Shenzhen Shilin Refrigeration Equipment Engineering Co., Ltd

Contact: Liu Minghe

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electricity Words:pass Really:

net Station:http://www.slzlsb.com

grounds Address: Gongming Development Economic New Zone, Bao'an District, Shenzhen