Compression condensing unit, water chiller and refrigeration air conditioning unit using evaporative condenser and control method thereof

Abstract

The utility model relates to an evaporative type condenser. Inside the plenum chamber of the upper box body of the evaporative type condenser is provide with a second heat exchanger used for removing frog, the lower box body is provided with a first heat exchange connected in series and used for condensation. The invention also relates to an evaporative cooled condensing unit applies the evaporative type condenser and a water chilling unit, mainly to achieve the function of a first mode in the cooling and condensation of a refrigerating fluid and to achieve the function of a second mode and a controlling system in the suction and compression of the refrigerating fluid. Wherein the first mode integrated in parallel by at least one evaporative type condenser, the second mode comprises at least one compressor, and the first mode and the second mode are combinedly installed on a common base seat, the number of the evaporative type condensing devices comprises by the first mode corresponds to the number of the compressor comprises by the second mode corresponds or the power steps of at least one compressor. The invention controls the start of the evaporative type condenser and the fan and water pump of the evaporative type condenser through temperature; adjusting and controlling the working state of the evaporative type condenser and the fan and water pump of the evaporative type condenser through the environment temperature and the exhaust pressure value of the compressor to maintain the pressure of the compressor within the scope of the preset pressure value; minimizing the operating power of the fan and the water pump to achieve the dynamic match between the heat dissipation capacity of the evaporative condensing unit and the needed heat dissipation of the compressor in operation.

Description

technical field [0001] The invention relates to refrigeration and air-conditioning technology, in particular to a compression condensing unit using an evaporative condenser as a condensing device, a water chiller and a refrigeration and air-conditioning unit and a control method thereof. Background technique [0002] In the field of refrigeration and air-conditioning technology, it is generally divided into two categories: water-cooled refrigeration and air-conditioning units and air-cooled refrigeration and air-conditioning units according to the cooling medium. Among them, the air-cooled refrigeration and air-conditioning unit uses the air-cooled condenser as the cooling and condensing equipment for the high-pressure superheated refrigerant gas discharged from the compressor, uses the ambient air as the cooling medium, and improves the heat transfer of the air-cooled condenser through the forced convection cycle of the fan. Efficiency, because of its simple structure, conv...

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Problems solved by technology

[0009] However, since the evaporative condenser must have a high wind speed during the operation of the cooling water to take away the saturated water vapor generated by the evaporation of the cooling water on the surface of the heat exchanger, the heat exchange effect of the heat exchanger can be ensured. The wind speed of the type condenser passing the surface of the heat exchanger is close to 4m / s, and some wind speeds are as high as 5m / s or more. Due to the high wind speed, while taking away the saturated water vapor generated during the heat exchange process, part of it has not evaporated. The cooling water is also taken away as water droplets and discharged into the ambient atmosphere by the fan. The water droplets are discharged to the atmosphere to directly form the water mist discharge problem. It is because the existence of the water mist discharge problem of the evaporative condenser has brought great pollution to the environment, and severely corroded the surrounding buildings, steel structures, and equipment, which has limited the popularization and application of the evaporative condenser in practice. Therefore, for refrigeration and air-conditioning systems that use evaporative condensers on land, the evaporative condensers are usually installed on the roof and installed separately from the compressor unit and other equipment to alleviate the water mist problem caused by the evaporative condenser during operation. Environmental pollution and inconvenience to people's lives, avoiding corrosion problems caused by water mist to other equipment, complicate the cooling system of refrigeration and air-conditioning devices using evaporative condensers, and the initial investment cost also increases significantly

[0010] In view of this, it is indeed necessary to solve the problem that the existing evaporative condensation and cooling devices inevitably discharge water mist. For this reason, the inventor of the application has made unremitting efforts and careful research to propose a new mist removal device, which is used in Evaporative condensing and cooling device, and using this evaporative condensing and cooling device with demisting function, an evaporative condenser with no water mist discharge is designed as a cooling and condensing equipment for high-pressure superheated refrigerant gas discharged from the compressor , forming a brand-new energy-saving evaporative cooling refrigeration and air-conditioning unit, which overcomes the above-mentioned shortcomings and problems existing in the prior art, and breaks through the technical bottleneck

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