Motor cooling structure, air conditioner and motor cooling method

Abstract

The invention provides a motor heat dissipation structure, an air conditioner and a motor heat dissipation method. The motor heat dissipation structure comprises a motor, a refrigerant pipe and a second control valve; a first control valve is arranged on the refrigerant pipe and is used for controlling the refrigerant pipe to be on and off; the second control valve is arranged on an outlet branch of a four-way valve, is in parallel connection with the refrigerant pipe and is used for controlling connection and disconnection of the outlet branch, wherein when the opening degree of the first control valve is maximum and the opening degree of the second control valve is zero, the refrigerant pipe is on, and the outlet branch is disconnected; and refrigerants flowing out from the interior of the four-way valve enter the refrigerant pipe from the first end, and after passing through the motor, the refrigerants flow into a gas-liquid separator through the second end. Through the technical scheme, when the temperature of the motor is too high, the refrigerants flowing out of the four-way valve can be utilized for carrying out heat dissipation and cooling on the motor, so that the cost for cooling and heat dissipation of the motor is saved, waste of the refrigerants is avoided, and the working cost of the air conditioner is saved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a motor heat dissipation structure, an air conditioner and a motor heat dissipation method. Background technique [0002] At present, with the improvement of people's living standards and the enhancement of energy-saving awareness, inverter air conditioners have entered the vast number of ordinary families and have been more and more widely used. Existing air conditioners generally all take the method of opening heat sinks in different ways on the surface of the motor, and cooling the motor with the air volume flowing through its surface. Due to its energy saving, flexible control, and easy installation and maintenance, DC variable frequency motors are more and more used in air conditioning systems, which greatly improve the heat exchange effect and efficiency of the air conditioning system. [0003] However, as the indoor and outdoor temperature rises, the motor speed ...

AI Technical Summary

Problems solved by technology

[0003] However, as the indoor and outdoor temperature rises, the motor speed increases and the heat generation increases. If it is in this state for a long time, the working efficiency of the motor will be reduced, and in severe cases, the motor may be burnt out. This forced convection The effect of heat exchange is relatively poor. When the air conditioner is running under some harsh conditions, the heat generated by the motor will continue to rise, which may eventually cause the motor to burn out. Speed ​​and other methods to reduce the heat generated by the motor during operation, which will cause the energy of the motor to not be used effectively, affect the normal operation of the air conditioner, and also reduce the safety and reliability of the air conditioner

Images