Two-stage ejection one-machine-and-two-temperature refrigeration system for expansion work recovery

Abstract

The invention discloses a two-stage ejection one-machine-and-two-temperature refrigeration system for expansion work recovery. According to the Two-stage ejection one-machine-and-two-temperature refrigeration system for expansion work recovery, a refrigeration compressor outlet and a condenser inlet are connected, one path of a condenser outlet is connected with a two-stage jetting and ejection device main fluid inlet, and the other path of the condenser outlet is connected with a heat regenerator high-pressure fluid inlet. A heat regenerator high-pressure fluid outlet is connected with a first expansion machine inlet, and a first expansion machine outlet is connected with a first evaporator inlet. A two-stage jetting and ejection device diffusion section outlet is connected with a gas-liquid separator mixed fluid inlet, and a gas-liquid separator gas outlet is connected with a heat regenerator low-temperature fluid inlet. A heat regenerator low-temperature fluid outlet is connected with a refrigeration compressor inlet, and a gas-liquid separator liquid outlet is connected with a second expansion machine inlet. A second expansion machine outlet is connected with a second evaporator inlet, and outlets of a first evaporator and a second evaporator are connected with first and second ejection fluid inlets of a two-stage jetting and ejection device correspondingly. The property ofthe refrigeration system can be improved.

Description

technical field [0001] The invention relates to the technical field of freezing and refrigeration of cold chain logistics, in particular to a two-stage injection one-machine dual-temperature refrigeration system for recovering expansion work. Background technique [0002] In the field of cold chain logistics refrigeration and refrigeration, the refrigeration device stores different items and requires different cold room temperatures. Two cold rooms with different evaporation temperatures can use a refrigeration system with one machine and two warehouses. Usually, a thermal expansion valve is used to adjust different evaporation temperatures. For the liquid supply of the evaporator, in order to ensure the unobstructed return air of each evaporator and prevent the high-pressure evaporator from passing gas to the low-pressure evaporator, it is necessary to install an evaporating pressure regulating valve at the outlet of the evaporator with a relatively low evaporation temperatu...

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Problems solved by technology

[0002] In the field of cold chain logistics refrigeration and refrigeration, the refrigeration device stores different items and requires different cold room temperatures. Two cold rooms with different evaporation temperatures can use a refrigeration system with one machine and two warehouses. Usually, a thermal expansion valve is used to adjust different evaporation temperatures. For the liquid supply of the evaporator, in order to ensure the unobstructed return air of each evaporator and prevent the high-pressure evaporator from passing gas to the low-pressure evaporator, it is necessary to install an evaporating pressure regulating valve at the outlet of the evaporator with a relatively low evaporation temperature. The outlet of the evaporator is equipped with a one-way valve, the system is relatively complex, the pressure of the low-temperature evaporator is low, the pressure ratio of the compressor is large, and the power consumption is large.

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