A multi-flow heat exchanger, a split flow adjustment method and a refrigerant circulation system

Abstract

The invention relates to a multi-flow heat exchanger, a split flow adjustment method and a refrigerant circulation system. The throttling elements at the inlets of multiple flow paths are crossed and fixed at the outlet positions of other flow paths, so as to exchange the working medium in the flow paths. The heated temperature is fed back to the throttling elements of different flow paths, and the throttling element senses the temperature of the working medium after heat exchange in different flow paths, and then adjusts the flow of working medium in the flow paths connected with the throttling element in series. Finally, the outlet temperatures of the working fluids of each flow path after heat exchange tend to be consistent. The invention can realize dynamic balance between the liquid supply and the heat exchange capacity of each flow path in the heat exchanger, and further can satisfy any changing working conditions and improve the heat exchange efficiency and heat exchange capacity of the heat exchanger.

Description

technical field [0001] The present invention relates to an air-conditioning device, in particular to a multi-flow heat exchanger installed in the air-conditioning device, and at the same time relates to a split-flow adjustment method of the multi-flow heat exchanger and the multi-flow heat exchanger comprising the multi-flow heat exchanger refrigerant circulation system. Background technique [0002] In refrigeration, air conditioning and heat pump hot water equipment, in order to improve the heat exchange efficiency of the evaporator, a multi-flow path structure design is generally adopted, and the low-temperature and low-pressure refrigerant flowing out of the throttling element enters the evaporator from multiple flow paths at the same time Perform heat exchange. [0003] In order to distribute refrigerant to each flow path in the evaporator, a flow divider is installed at the inlet of the evaporator, the inlet of the flow divider is connected to the outlet of the thrott...

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Problems solved by technology

[0004] Although the structures and adjustment methods disclosed in the prior art can accurately control the refrigerant flow ratio of each flow path at the time of design, they have the disadvantages of high manufacturing costs, long time required for structural design and debugging, and when structural design, It can only be debugged based on the rated working condition, and the length of the capillary can only ensure the balance of the heat exchange of each flow path under the rated working condition. The refrigerant in the evaporator will continue to change, and there will be insufficient refrigerant in some flow paths, and there will be too much refrigerant in the other part of the flow path, resulting in an unbalanced refrigerant flow ratio in each flow path of the evaporator, which will cause the evaporator to exchange heat. The area cannot be fully utilized, resulting in insufficient heat transfer of the evaporator and a reduction in the cooling efficiency of the system

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