Control system of fixed-displacement compressor

Abstract

The invention discloses a control system of a fixed-displacement compressor. The control system comprises a vehicle control unit and an air conditioner box assembly. The control system further comprises a temperature sensor which is used for detecting the actual temperature of an evaporator, and an air conditioner controller, and the vehicle control unit, the air conditioner box assembly and the temperature sensor are all electrically connected with the air conditioner controller; the control system has a frosting temperature protection mode, and when the frosting temperature protection mode is started, the air conditioner controller is used for increasing the upper limit set temperature value of suction of the compressor to a protection starting temperature value after the compressor is disconnected and outputting an air door control instruction to the air conditioner box assembly at the same time, and the air conditioner box assembly adjusts a cold and warm air door towards a full-cooling position according to the air door control instruction. According to the control system of the fixed-displacement compressor, the time needed for re-suction of the compressor can be prolonged, frequent starting of the compressor and waste of part of power consumption are reduced, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of automobile air conditioner manufacturing, in particular to a control system for a fixed-displacement compressor. Background technique [0002] In order to reduce the cost of the whole vehicle, some vehicles equipped with automatic air conditioning still use fixed-displacement compressors, but when the heat load is low, the compressors are started and stopped relatively frequently due to frost protection. Sometimes (such as idling speed) the user will obviously perceive the start and stop action of the compressor, which reduces the user's comfort, and there is room for improvement. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a control system for a fixed-displacement compressor, which can avoid frequent startup and shutdown of the compressor and improve ...

AI Technical Summary

Problems solved by technology

[0002] In order to reduce the cost of the whole vehicle, some vehicles equipped with automatic air conditioning still use fixed-displacement compressors, but when the heat load is low, the compressor starts and stops relatively frequently due to the protection of frost.

Sometimes (such as idling speed) the user will obviously perceive the start and stop action of the compressor, which reduces the user's comfort, and there is room for improvement

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