An ammonia-resistant motor for a closed ammonia refrigeration compressor

Abstract

The invention provides an ammonia-resistant motor for a closed ammonia refrigeration compressor. The ammonia-resistant motor comprises a liquid inlet, a compressor, a transmission shaft, a liquid outlet, a ball bearing, an electromagnetic valve, a power line, a power connection terminal, a rotor, a stator, a pressure-relief one-way valve and a backflow pipe; when the motor works, the electromagnetic valve is opened and an ammonia refrigerant enters a right chamber to cool the rotor and the stator from a left chamber; and when the motor stops working, the electromagnetic valve is closed and theleft chamber does not communicate with the right chamber. The stator and the rotor of the motor have waste heat and ammonia has volatility, so that the ammonia is volatilized through the waste heat and the pressure intensity in the right chamber is gradually increased; and when the pressure intensity reaches a critical value, the pressure-relief one-way valve is jacked through the ammonia refrigerant, the ammonia refrigerant flows to a main pipe through a return passage and the liquid level of the ammonia refrigerant in the right chamber falls, so that the power connection terminal is not soaked into the corrosive ammonia refrigerant.

Description

technical field [0001] The invention relates to the field of motors, in particular to an ammonia-resistant motor for a closed ammonia refrigeration compressor. Background technique [0002] In recent years, due to the discovery that freon refrigerants have destructive effects on the atmospheric ozone layer and can produce environmental problems such as the greenhouse effect, a consensus has been reached internationally to completely ban CFCs and gradually limit the use of HCFC refrigerants. Nowadays, people begin to re-evaluate ammonia refrigerant, and have invested a lot of manpower and material resources in the research of ammonia safety performance, refrigeration system and equipment technology. [0003] At present, there are mainly two types of ammonia refrigeration compressors: open type and closed type. At present, open type refrigeration compressors are mostly used in ammonia refrigeration, that is, the compressor and power are two independent systems, and the motor a...

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Problems solved by technology

[0005] But the power terminal of the motor of the existing hermetic ammonia refrigerating compressor has been soaked in the ammonia refrigerant (as the hermetic ammonia refrigerating compressor disclosed in the patent document JP Unexamined 2006-118417), due to the The power terminal is soaked in ammonia liquid for a long time, and the power terminal is easily corroded by ammonia refrigerant

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