Motor cooling structure, air conditioner, and motor cooling method

Abstract

The invention provides a motor cooling structure, an air conditioner, and a motor cooling method. The motor cooling structure includes a motor, a refrigerant pipe, a control valve, a first temperature sensor, a second temperature sensor, and a controller, the refrigerant pipe is arranged on the motor, the first end of the refrigerant pipe is connected with an outlet main pipeline of a condenser of the air conditioner, the second end of the refrigerant pipe is connected with a gas-liquid separator of the air conditioner, the control valve controls the opening and closing of the refrigerant pipe, when the refrigerant pipe is opened, refrigerant of the air conditioner enters into the refrigerant pipe via the first end through the outlet main pipeline and flows into the gas-liquid separator via the second end after passing through the motor, the first temperature sensor detects the outlet pipe temperature of a cooling branch, the second temperature sensor detects the outlet pipe temperature of a four-way valve, and the controller adjusts the opening degree of the control valve based on the difference of the outlet pipe temperature of the cooling branch and the outlet pipe temperature of the four-way valve. According to the invention, the motor cooling effect of the air conditioner is improved, and the energy efficiency of the motor can be maximally performed based on the normal operation of the air conditioner.

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 ...

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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

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