Novel micro channel evaporator

Abstract

The invention discloses a novel microchannel evaporator. A novel microchannel evaporator of the present invention comprises a working fluid inlet header, an intermediate gas-liquid separation header and a working fluid outlet header; one end of the working fluid inlet header is the working fluid inlet, with a fin Two ends of the flat tube are respectively connected to the middle gas-liquid separation header, one end of the middle gas-liquid separation header is connected to the working medium outlet pipe through a capillary, and the two ends of the flat tube with fins 2 are respectively connected to the middle gas-liquid separation header and the working medium. One end of the working medium outlet collecting pipe is connected to the working medium outlet pipe, and the sight glass is arranged on the working medium outlet pipe. The invention can eliminate the problems of uneven liquid separation and unbalanced pressure distribution of the microchannel heat exchanger, improve the uniformity of refrigerant distribution in the flat tube of the evaporator, make full use of the heat exchange area of ​​the heat exchanger, and improve the heat exchange performance of the system.

Description

technical field [0001] The invention relates to the technical field of refrigeration system evaporators, in particular to a novel microchannel heat exchanger. Background technique [0002] In the field of refrigeration, microchannel heat exchangers have been widely used as condensers, and have the advantages of low overall cost, high efficiency and energy saving, but the technology used as evaporators is still immature, mainly due to the growth of bubbles at the micro scale It will hinder the flow of liquid and affect the heat exchange effect, and will cause problems such as uneven liquid distribution between flat tubes, uneven liquid distribution between microchannels in each flat tube, and unbalanced pressure, resulting in micro The performance of the channel heat exchanger drops sharply when it works as an evaporator. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem of the gas-liquid two-phase flow in the existin...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of the gas-liquid two-phase flow in the existing microchannel evaporator, and to provide a new type of microchannel evaporator, which can discharge the gas working medium in the microchannel heat exchanger in time and eliminate the microchannel evaporator at the same time. Problems such as uneven liquid separation and unbalanced pressure distribution of the heat exchanger, improve the uniformity of the liquid supply distribution of the flat tube of the evaporator, make full use of the heat transfer area of ​​the heat exchanger, and improve the heat transfer performance of the system

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