variable segment compressor

Abstract

A variable-stage compressor is provided. The variable-stage compressor includes a first pressurizing assembly, a second pressurizing assembly, a driver and a switch mechanism. The first pressurizing assembly is provided with a first connecting shaft. The second pressurizing assembly is provided with a second connecting shaft. The tail end of the second connecting shaft is provided with a first external gear. The driver is disposed between the first and second pressurizing assemblies, and includes a transmission shaft. One end of the transmission shaft is fixedly connected to the first connecting shaft, and the other end is provided with a second external gear. The switch mechanism is disposed between the second pressurizing assembly and the driver and includes a coupling band. The coupling band sleeves and slides along the second connecting shaft. The inner wall of the coupling band is provided with an internal gear. The internal gear can be meshed with the first and second external gears or be separated from the second external gear.

Description

technical field [0001] The invention relates to a compressor structure, in particular to a variable section compressor. Background technique [0002] Existing compressors are not single-stage compressors, or multi-stage compressors. Multi-stage refrigerant compressors are suitable for low-temperature refrigeration systems with high compression ratios, or heat pump units at low ambient temperatures, but there are inherent limitations in practical applications. For example, in the working condition of low compression ratio, its compression efficiency obviously cannot exert the energy-saving benefits of the "two-stage theory", and is even inferior to single-stage compression. [0003] As an example, when the freezer is at normal temperature (15°C), the operating condition of the compressor at start-up is at a low pressure ratio, which cannot have high efficiency performance. When the freezer temperature drops to about -20°C, the two-stage compressor will It starts to show the ...

AI Technical Summary

Problems solved by technology

[0005] However, there is no screw compressor on the market with a single head and a shifting mechanism. The only practical way to achieve it is: two compressors are connected in series and parallel, combined with the complicated opening and closing of the shut-off valve. In order to realize the parallel connection of single-stage compression and serial connection of double-stage compression, the above-mentioned implementation method has the problems of high cost and difficult operation.

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