Direct refrigeration type magnetic suspension frequency-variable air conditioning unit

Abstract

The invention provides a direct refrigeration type magnetic suspension frequency-variable air conditioning unit, and relates to the technical field of refrigerating air conditioners. The unit comprises a compressor, a shell-tube type condenser, a throttling device and an air conditioning cabinet, wherein all the parts are sequentially connected to form a circuit. Heat of the shell-tube type condenser is exhausted outdoors through a cooling tower. The air conditioning cabinet sequentially comprises an air inflow section, a filter section, a cooling section and an air supply section from bottomto top. The unit is structurally characterized in that the magnetic suspension frequency-variable centrifugal compressor is adopted as the compressor, a direct evaporation type heat exchanger is arranged on the cooling section of the air conditioning cabinet, and a frequency-variable centrifugal fan is arranged on the air supply section of the air conditioning cabinet. Compared with the prior art,the unit can be flexibly adjusted according to the building load change, the energy efficiency of a refrigerating system can be improved, the structure of the system is simplified, and the operatingcost of an air conditioning system is reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to a direct refrigeration type magnetic levitation frequency conversion air conditioning unit. Background technique [0002] At present, in the ventilation and air conditioning system of large public building space, the form of chiller + air conditioning box terminal is often used for cooling and dehumidification. see figure 1 , This system includes a compressor 1, a shell-and-tube condenser 2, a throttling device 3, a shell-and-tube evaporator 4, and an air-conditioning box 6 that are sequentially connected to form a loop. The heat of the shell-and-tube condenser 2 is discharged to the outside through the cooling tower 7. The compressor 1 adopts a screw compressor. The cooling section is equipped with a surface cooler, and the air supply section is equipped with a centrifugal fan. The shell-and-tube evaporator 4 is connected to the surface cooler in th...

AI Technical Summary

Problems solved by technology

The pipeline configuration of the above system is complicated, and the chilled water system has poor load adjustment ability

At the same time, the part-load energy efficiency of the pipeline chiller is low, resulting in a low overall energy efficiency ratio and high operating costs when the system is running throughout the air-conditioning season

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