A multi-discharge pressure rolling rotor compressor

Abstract

The invention relates a multiple-exhaust-pressure rolling rotor type compressor, comprising an air cylinder mounted in a compressor shell and an eccentric rotor arranged in the air cylinder, wherein a crescent space is formed between the outer surface of the eccentric rotor and the inner surface of the air cylinder, the crescent space moves along with the rotation of the rotor, the air cylinder is provided with a slip sheet moving back and forth, the slip sheet tightly presses the outer surface of the eccentric rotor constantly and divides the crescent space into a high pressure cavity and a low pressure cavity, the air cylinder is provided with a suction passage communicated with the low pressure cavity and multiple exhaust passages communicated with the high pressure cavity, and an exhaust valve is arranged in each exhaust passage. Compared with the prior art, a function of providing multiple exhaust pressures by one rolling rotor type compressor is realized, the system compressor quantity is reduced, the cost is lowered, the occupied space is reduced, and the original advantages of the rolling rotor type compressor are kept.

Description

Technical field [0001] The invention relates to a rolling rotor compressor, in particular to a rolling rotor compressor with multiple exhaust pressures. Background technique [0002] Rolling rotor compressor is a positive displacement compressor, mainly composed of cylinder, eccentric rotor, sliding vane, exhaust valve and so on. The change of cylinder working volume is realized by the rolling of an eccentric rotor in the cylinder. The eccentric rotor is closely attached to the inner surface of the cylinder and rotates around the center line of the cylinder. A crescent-shaped space is formed between the outer surface of the eccentric rotor and the inner surface of the cylinder, which moves with the rotation of the rotor. The sliding plate is pressed against the outer surface of the rotor by spring or back pressure, and the reciprocating sliding plate divides the space range into two independent parts: a high pressure cavity and a low pressure cavity. One part directly communic...

AI Technical Summary

Problems solved by technology

[0004] At present, the common scrolling rotor compressors used in vapor compression refrigeration / heat pump systems can only provide a single discharge pressure, that is, the current vapor compression refrigeration / heat pump cycle using one scrolling rotor compressor can only have one condensing temperature (regardless of pressure drop)

Even if a system exists or requires multiple condensing temperatures, the discharge pressure of the compressor is usually determined by the highest condensing temperature, resulting in excessive power consumption of the compressor

Although multiple condensing temperatures can be achieved by using multiple compressors, the system will become more complicated and the cost will increase significantly

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