Semi-closed piston refrigeration compressor motor cooling mechanism

Abstract

The invention discloses a semi-closed piston refrigeration compressor motor cooling mechanism which comprises a motor rotor connected with a crankshaft and a motor stator matched with the motor rotor,wherein the motor rotor can rotate relative to the motor stator. An annular motor stator cavity is formed in the motor stator, and a through hole is formed in the top of the motor stator cavity and connected with a gas connecting pipe; the upper side wall of the motor stator cavity is provided with a through hole connected with a liquid connecting pipe; an annular motor rotor cavity is arranged in the motor rotor; and the motor rotor cavity is communicated with the motor stator cavity through a channel. Refrigerant liquid can be sprayed into the cavities of the stator and the rotor of the motor and absorbs heat emitted by the stator and the rotor of the motor to cool the motor, and thus the thermal performance and reliability of a refrigeration compressor are effectively improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to a motor cooling mechanism for a semi-hermetic piston refrigeration compressor. Background technique [0002] Semi-hermetic refrigeration compressors are widely used in small and medium-sized refrigeration devices. The motor cooling of existing semi-hermetic refrigeration compressors relies on the suction gas or liquid sprayed into the body space of the motor for cooling. The refrigerant directly contacts the motor. If the windings are in contact, some refrigerants will corrode the motor windings, causing short circuit or open circuit of the motor, resulting in the failure of the refrigeration compressor to work normally; the motor cooling method of sucking gas or discharging gas will increase the exhaust temperature of the refrigeration compressor and increase the pressure ratio. Large, resulting in a decrease in output gas volume, a decrease in volumet...

AI Technical Summary

Problems solved by technology

[0002] Semi-hermetic refrigeration compressors are widely used in small and medium-sized refrigeration devices. The motor cooling of existing semi-hermetic refrigeration compressors relies on the suction gas or liquid sprayed into the body space of the motor for cooling. The refrigerant directly contacts the motor. If the windings are in contact, some refrigerants will corrode the motor windings, causing short circuit or open circuit of the motor, resulting in the failure of the refrigeration compressor to work normally; the motor cooling method of sucking gas or discharging gas will increase the exhaust temperature of the refrigeration compressor and increase the pressure ratio. Large, resulting in a decrease in output gas volume, a decrease in volumetric efficiency, a decrease in the thermal performance of the refrigeration compressor, and ultimately a decrease in the performance of the refrigeration system

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