Multi-cycle variable flow refrigerating system

Abstract

The invention discloses a multi-cycle variable flow refrigerating system and aims at providing a system capable of reducing the initial investment and operating cost. A first exhaust port of a refrigerating compressor unit is connected with a second port of a heat exchanger through a second valve. A third port of the heat exchanger is connected with a first port of a three-way valve. A second portof the three-way valve is connected with one end of a second throttle valve and one end of a third valve correspondingly. The other end of the second throttle valve is connected with a first suctionport through an evaporator. The other end of the third valve is connected with a first port of the heat exchanger and one end of a first valve. The other end of the first valve is connected with a third port of the three-way valve in parallel and then is connected with a second suction port. A fourth port of the heat exchanger is connected with a second exhaust port through a first throttle valveand a condenser. The multi-cycle variable flow refrigerating system is flexible and convenient to switch, the initial investment of the system can be reduced, the system operation cost can be lowered,and the system is more stable in operation.

Description

technical field [0001] The invention relates to the technical field of refrigeration, and more specifically relates to a multi-cycle variable flow refrigeration system. Background technique [0002] When cooling at a lower temperature is required, the refrigeration system mainly has three circulating refrigeration systems according to different working conditions: [0003] Single-stage cycle refrigeration system: mainly suitable for winter cooling needs. In winter, the outdoor ambient temperature is not high, and the temperature difference between the heat sources of the refrigeration system is small, and single-stage compression can be realized. Generally, multi-head parallel connection is adopted, and the flow adjustment is realized by controlling the number of compressors put into operation. [0004] Two-stage cycle refrigeration system: suitable for working conditions with large temperature differences between heat sources in summer. In summer, the outdoor ambient temp...

AI Technical Summary

Problems solved by technology

At present, the corresponding refrigeration cycle method is generally adopted according to the main needs, which cannot be changed according to the change of working conditions, and the operating cost is high and the temperature fluctuates greatly.

Especially for the comparative experiments of the experimental system, they are designed separately, and the experimental results are affected by the system composition.

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