Variable frequency air conditioning system for dry working condition refrigeration and control method of variable frequency air conditioning system

Abstract

The invention discloses a variable frequency air conditioning system for dry working condition refrigeration and a control method of the variable frequency air conditioning system, and relates to thetechnical field of air conditioners. The variable frequency air conditioning system structurally comprises a fan, a compressor, an evaporator, an expansion valve, a condenser, a hot air bypass valve,a sensor used for obtaining the evaporation temperature, an air temperature sensor, an air humidity sensor and a controller, wherein the output end of the compressor is connected with the input end ofthe condenser, the output end of the condenser is connected with the input end of the expansion valve, the output end of the expansion valve is connected with the input end of the evaporator, and theoutput end of the evaporator is connected with the input end of the compressor; a controlled end of the compressor, the air humidity sensor, the air temperature sensor, the sensor used for obtainingthe evaporation temperature and the fan are correspondingly connected with the controller and are controlled by the controller; the sensor used for obtaining the evaporation temperature is arranged onthe evaporator, and the hot air bypass valve is arranged on a pipeline between an outlet of the compressor and an outlet of the expansion valve; and the compressor is a variable-frequency compressorcapable of achieving stepless regulation of output of the refrigerating capacity, the fan is an speed-adjustable fan capable of achieving stepless regulation of output of the air volume, and the hot air bypass valve is an electronic adjustable flow valve.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a frequency conversion air conditioning system for refrigeration in dry working conditions and a control method thereof. Background technique [0002] The cooling of the air conditioner in the computer room requires a high sensible heat ratio design. However, because the evaporation temperature of the air conditioner is uncontrollable, it is difficult to achieve a high sensible heat ratio. The necessary cooling capacity and excessive passive dehumidification need to be humidified by a humidifier, resulting in repeated loss of unnecessary humidification and dehumidification energy consumption, and the operation is not energy-saving. [0003] At present, in order to increase the sensible heat ratio, the existing technical solutions generally use the principle of large air volume and small enthalpy difference to increase the design air volume of the air conditioner in the c...

AI Technical Summary

Problems solved by technology

9 or so, it cannot completely avoid the unnecessary energy consumption of humidification and dehumidification caused by passive dehumidification, and it will significantly increase the energy consumption of the fan, reduce the energy efficiency ratio of the unit, and make the unit run more noisy

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