Cold-hot air conditioner with oil-free circulation pipeline

Abstract

The invention relates to a cold-hot air conditioner with an oil-free circulation pipeline. The cold-hot air conditioner is provided with a cold-hot circulation loop. The cold-hot circulation loop comprises a compressor. The compressor is an oil-gas separated type compressor. The compressor is composed of a driving motor and a compression device in transmission connection with the driving motor. The compression device is of an eccentric rotor type compression structure provided with a cylinder body, a main shaft, an eccentric rotor, a first sliding assembly and a second sliding assembly. The first sliding assembly, the eccentric rotor and the second sliding assembly divide a working hydraulic cavity into a suction cavity, a lubricating oil cavity and a discharge cavity which are sequentially arranged and made not communicated. Due to the fact that the compressor is the oil-gas separated type compressor, lubricating oil and a refrigerant are separated in the compressor, and the problem that the lubricating oil is attached to the inner walls of coppers pipes of a condenser and an evaporator is avoided. Accordingly, the heat exchange efficiency of the cold-hot air conditioner is greatly improved.

Description

technical field [0001] The invention belongs to the field of cooling and heating air conditioners, in particular to a cooling and heating air conditioner with oil-free circulating pipelines. Background technique [0002] The compressor plays a decisive role in performance in the existing air conditioner. Rotary compressors are widely used in the field of air conditioning due to their simple structure, reliable operation, and low cost. [0003] Existing rotary compressors use two lubrication methods for lubrication at the same time during operation. The first lubrication method is to deliver lubricating oil through an oil pump to achieve lubrication and sealing of the eccentric rotor, upper and lower end covers, and sliding baffles. However, using this This kind of lubricating method, only between the outer peripheral surface of the rotary sleeve and the inner wall of the cylinder body, the independent lubrication and sealing of the lubricating oil cannot be realized. There...

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Problems solved by technology

[0004] The air conditioner using the existing rotary compressor must have the following disadvantages during operation: (1), the lubricating oil is mixed in the compressor cylinder to occupy the volume of the compressor cavity element, because the volume of the compressor element is fixed, Relatively speaking, the space occupied by the refrigerant is correspondingly reduced, and for the same compressor, its refrigerant displacement is reduced; the higher the temperature of the compressor, the faster the lubricating oil vaporizes, and the larger the occupied space. The more lubricating oil that is taken away enters the pipeline; (2) Lubricating oil is viscous. When the compressor is working, the existence of lubricating oil will increase the damping of rotor rotation virtually, thereby increasing the power consumption of the compressor; (3) Lubricating oil and refrigerant mix and flow in the air conditioner pipeline, which will cause the lubricating oil to adhere to the inner wall of the copper tube to form an oil film insulation layer. The refrigerant needs to pass through the oil film insulation layer to perform heat exchange, so Will greatly affect the heat exchange of the refrigerant, thereby reducing the efficiency of the entire system

This is because the existing compressor cannot be reversed, because once the compressor is reversed, the oil in the system will enter the compressor and the compressor will not work

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