Control method for compressor exhaust temperature under heating conditions of air conditioner

Abstract

The invention relates to a control method for compressor exhaust temperature under heating conditions of an air conditioner. The control method includes the following steps that after the air conditioner is started, an electromagnetic valve runs for time t1 according to benchmark opening, detects coolant circulating flow and inquires a target discharge control table and sustaining time t2 of the coolant circulating flow within a zone corresponding to the target exhaust control table, and regulation of the electromagnetic valve is performed by taking initial standard opening corresponding to the coolant circulating flow zone in the target standard opening; when time t3 is sustained when the electromagnetic valve reaches the target standard opening, actual exhaust temperature of a compressor is detected, and opening of the electromagnetic valve is regulated according to difference between the actual exhaust temperature and the target exhaust temperature in the target exhaust control table. Under the same working condition and with the method, discreteness of the actual exhaust temperature of the compressor is lower than + / -30DEG C, consistency of heating air outlet temperature under the same working condition of the air conditioner is greatly improved, and heating performance of the air conditioner is improved.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning control, and in particular relates to a method for controlling the discharge temperature of a compressor in the low-temperature heating state of an air conditioner. Background technique [0002] At present, when the air conditioning system is in the heating mode, the degree of superheat is generally used to adjust the opening degree of the solenoid valve. However, when the air conditioner is heating, especially when heating at low temperature, the refrigerant cannot completely evaporate, resulting in no superheat. Therefore, it is very easy to cause the actual discharge temperature of the control compressor to be inconsistent with the target discharge temperature of the same system under the same working condition, that is, the temperature condition, and its discrete performance reaches ±10°C, resulting in the same air conditioner operating at the same temperature. Under working conditio...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for controlling the discharge temperature of the compressor under the heating state of the air conditioner, which solves the technical problem of inconsistent and high dispersion of the discharge temperature of the compressor under the same working conditions of the existing air conditioner

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