Compressor module and refrigeration device with same

Abstract

The invention discloses a compressor module and a refrigeration device with the same. The compressor module comprises a compressor and a control device; the compressor comprises a shell, first and second cylinders and a bypass channel; the shell is provided with an air sucking port and an exhaust port; the first cylinder is provided with a first exhaust port; a first air sucking port is connectedwith the air sucking port; the second cylinder comprises a second cylinder cavity, a second air sucking port and a second exhaust port; one end of the bypass channel is connected with the second cylinder cavity, and an on-off hole is formed between the end of the bypass channel and the second cylinder cavity; an on-off piece is arranged in the on-off hole; one end of the on-off hole communicates with the second cylinder cavity; the control device comprises first to fourth joints; the first joint is connected with the first exhaust port; the second joint is respectively connected with the otherend of the bypass channel and the second air sucking port; the third joint is connected with the other end of the on-off hole; and the fourth joint is connected with the exhaust port. The compressormodule can realize the switching operation between partial capacity and total capacity.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a compressor assembly and a refrigeration device having the same. Background technique [0002] In related technologies, two-stage compression has the advantages of small capacity attenuation and high energy efficiency in heating (especially (ultra) low-temperature heating). However, in terms of refrigeration, two-stage compression is due to the compressed refrigerant being compressed twice Exhaust valve plate of the machine, thus making the energy efficiency low. Independent compression has higher energy efficiency in refrigeration, but there is still a gap between two-stage compression and two-stage compression in terms of capacity improvement in (ultra) low temperature heating. [0003] At the same time, in order to ensure the best capacity and energy efficiency, the volume ratio of the two independently compressed cylinders during cooling operation is quite different f...

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Problems solved by technology

[0002] In related technologies, two-stage compression has the advantages of small capacity attenuation and high energy efficiency in heating (especially (ultra) low-temperature heating). However, in terms of refrigeration, two-stage compression is due to the compressed refrigerant being compressed twice Exhaust valve plate of the machine, resulting in low energy efficiency

Independent compression has higher energy efficiency in refrigeration, but there is still a gap between two-stage compression and two-stage compression in terms of (ultra) low-temperature heating.

[0003] At the same time, in order to ensure the best capacity and energy efficiency, the volume ratio of the two independently compressed cylinders during cooling operation is quite different from the two-stage compression ratio during heating operation. Switching between independent compression mode and two-stage compression mode, but it is difficult to guarantee that each can adopt a better cylinder ratio

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