Multi-temperature-zone refrigerator comprising work recovery pulse tube cryocooler and refrigerating method

Abstract

The invention provides a multi-temperature-zone refrigerator comprising a work recovery pulse tube cryocooler and a refrigerating method. The refrigerator comprises a refrigerator body and a refrigerating device. The refrigerator body comprises a first freezing chamber and a second freezing chamber. The refrigerating device comprises a refrigerating machine part, a cold guide part and a control part. The refrigerating machine part comprises a compression unit with a compression cavity, two cold finger units and a work recovery unit. An expansion cavity communicates with a first hot-end heat exchanger through a first expansion pipe and communicates with a second hot-end heat exchanger through a second expansion pipe. A first work recovery cavity communicates with a first compression pipe through a first work recovery pipe. A second work recovery cavity communicates with a second compression pipe through a second work recovery pipe. A first solenoid valve is arranged on the first compression pipe. A second solenoid valve is arranged on the second compression pipe. The first solenoid valve and the second solenoid valve are used for controlling the working conditions of the first coldfinger unit and the second cold finger unit correspondingly. The cold guide part comprises a first cold guide unit and a second cold guide unit. The control part comprises a controller connected withthe refrigerating machine part.

Description

technical field [0001] The invention belongs to the field of home appliances, and in particular relates to a multi-temperature-zone refrigerator combined with a heat recovery pulse tube refrigerator and a heat pipe, and a refrigeration method. Background technique [0002] With the advancement of science and technology and the development of the times, people's living standards continue to improve, and people's requirements for food are getting higher and higher. The freezing function of ordinary refrigerators is gradually unable to meet people's requirements for freezing some foods, such as some seafood at lower temperatures. Only when it is stored under low temperature can it maintain a fresh and tender taste. Usually, the storage temperature is required to be below -20°C. In addition, some foods such as meat are stored at a lower temperature, which can inhibit the reproduction of bacteria and enzyme activity, reduce the loss of nutrients, and preserve the freshness better...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of science and technology and the development of the times, people's living standards continue to improve, and people's requirements for food are getting higher and higher. The freezing function of ordinary refrigerators is gradually unable to meet people's requirements for freezing some foods, such as some seafood at lower temperatures. In order to keep the fresh and tender taste, it is usually required to be stored at a temperature below -20°C.

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