Multi-flow-path heat exchanger, shunt adjusting method and refrigerant circulating system

Abstract

The invention relates to a multi-flow-path heat exchanger, a shunt adjusting method and a refrigerant circulating system. Throttle elements at inlets of a plurality of flow paths are fixed to the outlet positions of other flow paths in a mutually intersected mode, so that the temperatures of the interiors of the flow paths after working mediums are subjected to heat exchanging are fed back to thethrottle elements of the different flow paths; the throttle elements feel the temperatures of the interiors of the different flow paths after the working mediums are subjected to heat exchanging, andthen the flow of the working mediums in the flow paths which are in series connection with the throttle elements is adjusted; and finally, the outlet temperatures of all the flow paths after the working mediums are subjected to heat exchanging approach to the same. According to the multi-flow-path heat exchanger, dynamic balance of liquid supplying and the heat exchanging ability of all the flow paths in the heat exchanger can be achieved, then freely changed working conditions can be met, and the heat exchanging efficiency and the heat exchanging ability of the heat exchanger are improved.

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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