Method for protecting compressor when air conditioner makes heat in high temperature environment

Abstract

The invention discloses a method for protecting a compressor when an air conditioner makes heat in the high temperature environment. The method can prolong the service life of the compressor, prolong the heat-making time of the air conditioner and shortens the interval time of the shutting-down of the air conditioner. When the temperature of a pipe coil of an indoor exchanger of the air conditioner is more than or equal to 52 DEG C, the wind velocity of an indoor blower is high; when the temperature of the pipe coil of the indoor exchanger of the air conditioner is more than or equal to 56 DEG C, a central microprocessor shuts down an outdoor blower of the air conditioner; when the temperature of the pipe coil of the indoor exchanger of the air conditioner is more than or equal to 65 DEG C, the central microprocessor shuts down the compressor of the air conditioner; when the temperature of the pipe coil of the indoor exchanger of the air conditioner is less than or equal to 50 DEG C, the air conditioner reverts to the working state before the moment when the temperature of the pipe coil of the indoor exchanger is more than or equal to 52 DEG C.

Description

Protection method for compressor used in air conditioner heating in high temperature environment technical field The invention relates to the technical field of air conditioners, in particular to a method for protecting compressors used for heating by air conditioners in high temperature environments. Background technique At present, air conditioners have two basic working modes, cooling and heating. Due to differences in user regions and installation environments, air conditioners work at different ambient temperatures. Regardless of whether the air conditioner is cooling or heating, its load The size is directly related to the ambient temperature. When the air conditioner still uses heating when the ambient temperature is as high as 20°C (such as a bathing place or a hot pot city), the suction pressure of the compressor increases. At this time, the discharge pressure of the compressor The higher the exhaust temperature, the higher the temperature rise of the compressor. ...

AI Technical Summary

Problems solved by technology

At present, air conditioners have two basic working modes, cooling and heating. Due to differences in user regions and installation environments, air conditioners work at different ambient temperatures. Regardless of whether the air conditioner is cooling or heating, its load The size is directly related to the ambient temperature. When the air conditioner still uses heating when the ambient temperature is as high as 20°C (such as a bathing place or a hot pot city), the suction pressure of the compressor increases. At this time, the discharge pressure of the compressor The higher the exhaust temperature, the higher the temperature rise of the compressor. The temperature rise of the compressor will lead to a decrease in the insulation performance of the compressor motor winding, resulting in a shortened service life of the compressor, or even burning the compressor. In this way, often Cause serious dissatisfaction, complaints, and withdrawals from users, which will bring huge losses to the company's brand and cause the company's economic burden

Existing protection methods for compressors used for air conditioning and heating in high-temperature environments generally use the self-protection device of the compressor to protect the compressor, but the self-protection device has the following defects, because the protection conditions of the self-protection device are set relatively High, generally when the operating temperature of the compressor is higher than 130°C, the self-protection device protects the compressor, that is, temporarily shuts down the compressor, and uses heating when the ambient temperature is as high as 20°C, the operating temperature of the compressor It will quickly rise to more than 130°C, the heating time of the air conditioner is short, and the compressor works at nearly 130°C, which will cause the insulation of the compressor motor winding to deteriorate and reduce the service life of the compressor; when the compressor is protected by itself After the protection of the device, since the self-protection device generally does not reset until the temperature of the compressor is about 50°C, and then the compressor can be restarted, the air conditioner must be shut down for a long period of time (usually more than half an hour) to use The compressor can only be restarted after the operating temperature drops, so the downtime of the air conditioner is relatively long, and the user obviously feels that the air conditioner has stopped. When this happens many times, the user will feel that the reliability of the air conditioner of this brand is poor. It cannot be used continuously, that is, poor user satisfaction, which will directly lead to brand loss and sales reduction of this brand of air conditioner