Energy-saving enthalpy difference laboratory heat exchange system with switchable mode

Abstract

The invention discloses a switchable mode energy-saving enthalpy difference laboratory heat exchange system, comprising a first heat exchanger, a second heat exchanger, a first switch assembly, a second switch assembly, a third switch assembly, and a fourth switch components, the first compressor, the second compressor, the condenser, the pressure regulating assembly and the fluorine tank, the first compressor, the condenser and the fluorine tank cycle in turn to form the first cycle, the second compressor, the condenser and the fluorine tank in turn The cycle forms a second cycle. The first heat exchanger can enter and output refrigerant at different positions of the first cycle or the second cycle through the first switch assembly, and the second heat exchanger can be used in the first cycle through the second switch assembly. Or different positions of the second cycle are connected to and output refrigerant, the second compressor can be connected to the outlet of the fluorine barrel or the outlet of the first heat exchanger through the third switch assembly, and the second compressor can be connected to the outlet of the first heat exchanger through the fourth switch assembly. The inlet of the condenser may be connected to the inlet of the fluorine barrel, and the pressure regulating component can adjust the pressure of the fluorine barrel.

Description

technical field [0001] The invention relates to the field of refrigeration systems, in particular to an energy-saving enthalpy difference laboratory heat exchange system with switchable modes. Background technique [0002] Existing air-conditioning laboratories are generally equipped with independent refrigeration systems indoors and outdoors, which can be used to control the temperature of the laboratory. [0003] However, the existing refrigeration system still has the following shortcomings: [0004] 1) Because the load of the air-conditioning laboratory has the characteristics of a heat pump, that is, when one side is in a cooling state, the other side must be in a heating state. Therefore, the coolers on both sides often do not need to reach their maximum capacity at the same time. Therefore, there will always be a part of the chiller in an idle state and cannot be fully utilized. [0005] 2) Most of the chillers are operated by manual start and stop method, and the ...

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Problems solved by technology

Therefore, there will always be a part of the cold machine in an idle state, which cannot be fully utilized

[0005] 2) Most chillers are operated by manual start-stop method, and the number of chillers that can be turned on cannot be automatically changed according to the system load

[0006] 3) At the same time, these independent chillers cannot realize the free conversion of cooling / heating due to the independence of the system structure

[0007] 4) Moreover, the general refrigeration system controls the expansion valve of the evaporator through the degree of superheat. This method makes the evaporation temperature not an independent control parameter, and cannot be adjusted in a wide range according to the working conditions and load requirements.

[0008] 5) Some laboratories use a unified cold source, such as a parallel chiller system to supply indoor and outdoor cooling, but because of the difference in indoor and outdoor working conditions, if the chiller meets the working conditions of the lower temperature side, the overall energy efficiency of the chiller will be greatly reduced , cannot provide enough cooling on the other side

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