Energy-saving control device and control method for variable displacement compressor of air conditioner

Abstract

The invention relates to an energy-saving control device for a variable displacement compressor of an air conditioner. The energy-saving control device comprises an inside temperature control module, an outlet air temperature control module and a compressor control module, wherein the outlet air temperature control module comprises a base value computing unit which is used for acquiring a target value which is less than a target outlet air temperature according to the target outlet air temperature and the outside temperature, a dynamic value computing unit which is used for determining a first compensation value according to the temperature difference of the air-conditioner set temperature and the inside temperature, and a target evaporator temperature computing unit which is used for summing the target value and the first compensation value so as to acquire a target evaporator temperature which is close to the target outlet air temperature. By the energy-saving control device for the variable displacement compressor of the air conditioner, the adjustability of an external control variable displacement compressor is used fully, influence of the environment inside and outside an automobile on a refrigeration system is taken into account, and the target evaporator temperature can be adjusted in real time according to the current refrigeration needs inside the automobile, so that excellent energy-saving property of an automotive air conditioning system is ensured.

Description

technical field [0001] The invention relates to the control of a variable-displacement compressor of an air conditioner, in particular to an energy-saving control device and a control method of an externally controlled variable-displacement compressor of a vehicle-mounted air conditioner. Background technique [0002] With the rapid development of the automobile industry, people's requirements for the performance and comfort of automobile air conditioners are constantly increasing. The existing non-independent fixed-displacement compressor automotive air-conditioning system has been difficult to meet user requirements. On the one hand, in the case of large temperature fluctuations in the car, the irreversible loss caused by the frequent start and stop of the non-independent fixed-displacement compressor automotive air-conditioning system increases the system energy consumption; on the other hand, the fixed-displacement compressor Periodic clutching has seriously disturbed t...

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Problems solved by technology

[0004] The control device of the existing externally controlled variable displacement compressor only considers the influence of the environment on the refrigeration system when controlling it, so that the target evaporator temperature is fixed at a fixed value, making the externally controlled variable displacement compressor It is difficult to bring out the energy-saving characteristics of the machine

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