A heat exchanger and its header assembly

Abstract

The invention discloses a heat exchanger and a collecting pipe assembly of the heat exchanger. The collecting pipe assembly comprises a collecting pipe body, wherein a plurality of heat exchange tube insertion holes are axially formed in the collecting pipe body, the inner cavity of the collecting pipe body is axially divided into a plurality of independent chambers respectively and correspondingly communicated with the heat exchange tube insertion holes, the independent chambers are communicated with at least one heat exchange tube insertion hole, each independent chamber is communicated with an external heat exchange medium through corresponding pipelines, the pipelines are respectively communicated with the independent chambers, and the independent chambers are communicated with heat exchange tubes inserted into the heat exchange tube insertion holes in the independent chambers. Each independent chamber of the cavity of the collecting pipe body is small in space area, so that the falling route of the heat exchange medium from a channel inlet to the inner part of the inner is greatly shortened, and a gas-liquid separation phenomenon caused due to gravity action during the falling process of the heat exchange medium is slowed down; furthermore, the heat exchange medium does not need to be distributed from bottom to top after flowing into the independent chambers, so that the heat exchange medium in each heat exchange tube can be uniformly distributed, and the heat exchange efficiency of the heat exchanger is increased.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a heat exchanger and a header assembly thereof. Background technique [0002] A heat exchanger is a device that realizes heat transfer between cold and hot fluids, and is widely used in HVAC and other fields. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a typical heat exchanger in the prior art. [0004] A typical heat exchanger includes two headers parallel to each other, and between the two headers there are a plurality of substantially parallel heat exchange tubes 3', and between adjacent heat exchange tubes 3' there are Corrugated fins 2'. The two headers are provided with a plurality of heat exchange interfaces on the corresponding tube walls along the length direction, and the two ends of the heat exchange tube 3' are respectively inserted into the heat exchange interfaces on the headers to realize the two collectors. The f...

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Problems solved by technology

However, in actual use, the state of the refrigerant at the inlet of the heat exchanger is a gas-liquid two-phase state. Due to the large difference in density between the gas and liquid phase refrigerants, gas-liquid separation will occur under the action of gravity, which will cause the refrigerant to be in a heat exchange state. The uneven distribution in the tube 3', especially for the vertically placed heat exchanger, the gas-liquid separation phenomenon is more serious, resulting in a greatly reduced heat exchange efficiency of the heat exchanger; after the cold medium enters the header, due to the And the influence of the resistance of the heat exchange tube 3' will also cause the uneven distribution of the refrigerant in the heat exchange tube 3'

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