Heat exchanger and multi-split system with the same

Abstract

The invention discloses a heat exchanger and a multi-split system with the same. The heat exchanger comprises a manifold and a collecting pipe, the manifold comprises a body, an inlet and a plurality of flow separating holes, the inlet is formed in the bottom of the body, the flow separating holes are distributed in the side wall of the body in the length direction of the body, from the bottom to top, the body comprises several segments of pipe bodies, according to each two adjacent segments of pipe bodies, the flow area of the downstream pipe body is smaller than the flow area of the upstream pipe body, the height of each segment of pipe body is less than or equal to 0.5 meters, and the number N of the pipe bodies is more than or equal to 2 and less than or equal to 3; the collecting pipe and manifold are communicated through a plurality of heat exchange pipes, the heat exchange pipes are distributed at intervals in the vertical direction, and the collecting pipe has a refrigerant discharge hole. According to the heat exchanger, two-phase refrigerant can be well distributed without a flow separating capillary.

Description

technical field [0001] The invention relates to the field of heat exchanger equipment, in particular to a heat exchanger and a multi-line system with the heat exchanger. Background technique [0002] The multi-connected system in the related art is composed of an outdoor unit, an indoor unit, and a refrigerant flow switching device between indoor and outdoor. According to the difference in the number of refrigerant pipes between the outdoor unit and the refrigerant flow switching device, it is divided into three control systems (that is, there are three refrigerant pipes). And two-pipe (that is, there are two refrigerant pipes). Although the refrigerant circuit of the two-pipe outdoor unit is relatively complicated, it has attracted attention because of its relatively simple construction and low cost. [0003] For the two-pipe multi-connected system, the heat exchanger of the outdoor unit must be designed so that the flow direction of the refrigerant is fixed, that is, the f...

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Problems solved by technology

[0002] The multi-connected system in the related art is composed of an outdoor unit, an indoor unit, and a refrigerant flow switching device between indoor and outdoor. According to the difference in the number of refrigerant pipes between the outdoor unit and the refrigerant flow switching device, it is divided into three control systems (that is, there are three refrigerant pipes). and two-pipelines (i.e. two refrigerant pipes), among which the two-pipeline outdoor unit is relatively complex in refrigerant circuits, but it has attracted much attention due to its relatively simple construction and low cost

[0003] For the two-pipe multi-connected system, the heat exchanger of the outdoor unit must be designed so that the flow direction of the refrigerant is fixed, that is, the flow direction of the refrigerant has nothing to do with cooling or heating. In order to reduce the flow resistance of the refrigerant when the outdoor unit is cooling, the flute tube is usually used instead of the traditional heat pump. Capillary tube design, which tends to cause the two-phase refrigerant bias flow during outdoor heating, resulting in low heating performance of the system

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