Method for controlling low-temperature heating start of air conditioner as well as air conditioner and storage medium

Abstract

The invention discloses a method for controlling low-temperature heating start of an air conditioner as well as the air conditioner and a storage medium. The method for controlling low-temperature heating start of the air conditioner comprises the following steps: responding to a heating start instruction, and obtaining outdoor environment temperature and compressor duration time of stopping operation; according to the outdoor environment temperature and the compressor duration time of stopping operation or according to the outdoor environment temperature and length of a connected tube of theair conditioner, determining that the air conditioner meets a condition of entering a low-temperature heating start control mode; performing at least one of the following: controlling compressor operation, and controlling a four-way valve to electrify while operation time length of the compressor reaches first preset time length; regulating rotation speed of an outdoor fan according to the outdoorenvironment temperature; and obtaining a compressor gas exhaust temperature, and controlling a heating state of an electric heating belt of the compressor according to the gas exhaust temperature andthe outdoor environment temperature. The method can increase gas suction pressure, under a low-temperature environment, of the compressor, and strengthens use reliability of the compressor.

Description

Technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a method for controlling the low-temperature heating start of an air conditioner, a non-temporary computer storage medium and an air conditioner. Background technique [0002] With the development of social economy, consumers' use temperature range of air conditioners is also increasing. Consumers hope that air conditioners can operate normally in a relatively wide temperature range. Some exporting countries have also explicitly required air conditioners to be at minus 25 degrees. It can start and run normally when heating. However, in a low temperature environment, the air conditioner is turned on again after it has been shut down for a period of time. At this time, due to the low outdoor temperature, a large amount of liquid refrigerant is deposited in the oil tank at the bottom of the compressor, and because of the high viscosity of the refrigerating oil, it starts...

AI Technical Summary

Problems solved by technology

However, in a low-temperature environment, after the air conditioner has been shut down for a period of time, it is powered on again to start. At this time, due to the low outdoor temperature, a large amount of liquid refrigerant is deposited in the oil tank at the bottom of the compressor. When the refrigerant and refrigerating oil circulate poorly, the low pressure of the air conditioning system is too low, and the cooling effect of the refrigerant on the motor becomes poor, resulting in overheating of the enameled wire of the motor winding and burning of the insulation layer, which affects the service life of the compressor, especially in low temperature environments The situation is more serious when the piping setting is long

[0003] In related technologies, when the air conditioner is heating and starting, some schemes temporarily shield the low-voltage protection function of the low-voltage switch through the CPU control logic. After the compressor runs for 3-5 minutes and the system pressure gradually increases, the low-voltage switch is used for normal detection. Judging the system pressure, but actually during this period of 3-5 minutes, the compressor has been running at an extremely low operating pressure, especially in the case of frequent starts and stops, which will seriously affect the reliability of the compressor

Or, some schemes add a heating belt to the oil tank at the bottom of the compressor to heat the refrigerated oil and liquid refrigerant at the bottom of the compressor, but this heating method cannot effectively distinguish the starting state of the compressor and the installation state of the long piping, so Can cause energy wastage due to insufficient or continuous heating

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