Plate heat exchanger

Abstract

The invention provides a plate heat exchanger. The plate heat exchanger comprises a plurality of heat exchange plates, wherein the heat exchange plates are overlaid with one another, and each heat exchange plate is provided with a fluid inlet and a fluid outlet which are located in the two opposite ends of the heat exchange plate respectively in the lengthwise direction. A partition part is arranged on the upper surface and / or the lower surface of each heat exchange plate, so that fluid from the fluid inlets is divided at the fluid inlets, then flows into independent fluid passage zones partitioned by the partition parts, gathers at the fluid outlets and flows out of the fluid outlets at last.

Description

technical field [0001] The invention relates to the fields of HVAC, automobile, refrigeration and transportation, and in particular to a plate heat exchanger. Background technique [0002] For parallel-channel heat exchangers (evaporators), especially plate heat exchangers and micro-channel heat exchangers, refrigerant mal-distribution is a worldwide technical problem. Usually, the refrigerant entering the heat exchanger exists in the form of two phases. Due to the application conditions and the complexity of the two-phase flow, it is difficult to achieve uniform distribution of the refrigerant. In many cases, excess liquid refrigerant will flow into some channels, while too much gaseous refrigerant will flow into other channels, which will greatly affect the overall performance of the evaporator. [0003] However, since the heat exchange plate is too wide, it is difficult to obtain good fluid distribution for such a large heat exchange plate, for example along the lengthwi...

AI Technical Summary

Problems solved by technology

Usually the refrigerant entering the heat exchanger exists in the form of two phases, due to the application conditions and the complexity of the two-phase flow, it is difficult to achieve uniform distribution of the refrigerant

In many cases, excess liquid refrigerant will flow into some channels, while too much gaseous refrigerant will flow into other channels, which will greatly affect the overall performance of the evaporator.

[0003] However, it is difficult to obtain good fluid distribution for such a large heat exchange plate because the heat exchange plate is too wide, for example along the lengthwise direction of the heat exchange plate

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