One drag multiple air conditioner, air conditioner antifreeze protection method and air conditioner antifreeze protection system

Abstract

The invention provides a multi-slit air conditioner, an air conditioner anti-freezing protection method and an air conditioner anti-freezing protection system. The multi-split air conditioner comprises a plurality of indoor units, temperature sensors and an outdoor unit, wherein each indoor unit is connected with the outdoor unit of the multi-slit air conditioner through a low-pressure valve air return pipe, each temperature sensor is arranged on the corresponding low-pressure valve air return pipe, and is used for detecting the temperature of a coolant output of the corresponding indoor unit connected with the corresponding low-pressure valve air return pipe in a refrigeration mode or a dehumidifying mode, and sending the detection result to the outdoor unit, and the outdoor unit is used for receiving the detection result from each temperature sensor, and judging whether the temperature of the coolant outlet of each indoor unit meets the preset anti-freezing condition or not according to the detection result, and decreasing the efficiency of a compressor of the outdoor unit when the temperature of the coolant outlet of each indoor unit meets the preset anti-freezing condition. By adopting the technical scheme, the multi-slit air conditioner has the advantage that the efficiency of the compressor of the outdoor unit can be decreased according to the temperature of the coolant outlet of each indoor unit, so the freezing of an evaporator of the corresponding indoor unit is prevented, and the corresponding compressor does not need to stop running.

Description

technical field [0001] The invention relates to the technical field of terminals, in particular to a one-driver-multiple air conditioner, an air conditioner antifreeze protection method and an air conditioner antifreeze protection system. Background technique [0002] At present, the evaporator and outdoor piping of the outdoor unit of the one-to-many air conditioner on the market are prone to frost when cooling. In the prior art, a temperature sensor is generally installed on the evaporator of the indoor unit, and when the temperature sensor detects that the temperature of the evaporator is lower than freezing point, the indoor unit will be periodically deiced. During this deicing process, the compressor of the outdoor unit will stop working, and the indoor unit will automatically dissolve the frost under the blowing of natural wind. [0003] However, the one-to-many air conditioner has the characteristics of using many rooms. The temperature required for different rooms i...

AI Technical Summary

Problems solved by technology

[0003] However, the one-to-many air conditioner has the characteristics of using many rooms. The temperature required for different rooms is different, and the user's usage habits are also different. If the temperature of one indoor unit reaches freezing point, the compressor of the outdoor unit will stop running. , it will cause the indoor units installed in other rooms to be unable to continue cooling

However, if frost occurs in an indoor unit and the compressor of the outdoor unit continues to run, the refrigerant returned to the compressor will be in a liquid return state for a long time, making the compressor prone to liquid shock

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