Compressor isolating motor stator from pump body

Abstract

The invention relates to a compressor isolating a motor stator from a pump body, which comprises an air suction pipe, the pump body, the motor stator, a steel cylinder and a shell, wherein one end of the air suction pipe is connected with an air suction port at the lower end of a compressor body, and the other end of the air suction pipe is connected with a low-pressure cavity at the upper end of the compressor body; the pump body and a motor rotor are arranged in the steel cylinder; the motor stator is arranged between the steel cylinder and the shell, and is isolated from the motor rotor by the steel cylinder; air entering the compressor flows upwards from the lower end face of the motor stator, and reaches the cavity on the upper part of the motor stator through an iron core of the motor stator to cool a motor; and then a coolant enters a cylinder from the cavity on the upper part, and is compressed and exhausted out of the compressor. Compared with the prior art, the compressor can effectively reduce the coiling temperature of the motor, is applied to occasions of high-pressure ratios, overloads and high exhaust temperatures, and can save a reservoir of the compressor and reduce the cost.

Description

technical field [0001] The invention relates to a compressor, in particular to a compressor which isolates a motor stator from a pump body. Background technique [0002] The gas in the existing high-pressure cavity rotary compressor enters the cylinder through the liquid receiver, and is compressed in the cylinder to become high-temperature and high-pressure gas and then discharged. The high-temperature and high-pressure gas refrigerant takes away the heat of the motor through the motor. The temperature of the motor must be higher than that of the refrigerant. The temperature of the gas refrigerant rises further, and it is discharged from the exhaust pipe into the air conditioning system. [0003] The high-pressure cavity rotary compressor uses high-temperature and high-pressure refrigerant to cool the motor. The temperature of the R22 or R410A refrigerant compressor motor exceeds 100°C under rated conditions, and is close to 130°C under overload, but the insulating varnish...

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Problems solved by technology

[0003] The high-pressure cavity rotary compressor uses high-temperature and high-pressure refrigerant to cool the motor. The temperature of the R22 or R410A refrigerant compressor motor exceeds 100°C under rated conditions, and is close to 130°C under overload, but the insulating varnish and insulating paper of the motor are all organic materials. At high temperature, the service life is halved for every 8°C increase, and the reliability of the high-pressure chamber structure is facing a severe test in the occasion of high pressure ratio and high exhaust temperature.

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