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Heat exchanger

A heat exchanger and header technology, applied in the field of micro-channel heat exchangers, can solve the problem of uneven secondary distribution of refrigerant, and achieve the effects of solving uneven secondary distribution, uniform refrigerant amount, and improving distribution uniformity

Inactive Publication Date: 2014-08-27
ZHEJIANG DUNAN THERMAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention proposes a heat exchanger, which solves the problem of uneven secondary distribution of refrigerant in the header, improves the uniformity of refrigerant distribution in the heat exchanger, thereby improving heat exchange performance

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] refer to figure 2 , 3 , for the above-mentioned heat exchanger, the refrigerant distributor 3 of the present embodiment has four liquid branch pipes 30, and each liquid branch pipe 30 has an insertion hole inserted into the inner space of the collector pipe 1 from the side wall of the collector pipe 1. Part 31, the insertion part 31 is provided with an opening 311, the refrigerant flows into the inner space of the header 1 through the opening 311, and the liquid outlet direction of the opening 311 forms an angle with the liquid inlet direction of the microchannel flat tube 2.

[0032] Generally, there are multiple openings 311, and these openings can be small holes or slits with small openings, which are only suitable for the circulation of refrigerant. The pipe diameter is much smaller, and the opening of the opening 311 is smaller than the pipe diameter of the insertion part 31, so the flow rate of the refrigerant flowing out of the opening 311 is faster, and the ef...

Embodiment 2

[0043] refer to Figure 4 , the difference of this embodiment is that: the side wall of the insertion part 31 is provided with a plurality of openings 311, and the plurality of openings 311 are arranged in a linear array along the axial direction of the insertion part 31, which can be one or more rows In this way, a plurality of refrigerant injection positions can be formed in the longitudinal direction and radial direction of the header 1; and, the liquid outlet direction of the openings in the same row is the same as the angle formed by the liquid inlet direction of the microchannel flat tube 2.

Embodiment 3

[0045] refer to Figure 5 , the difference of this embodiment is that: the side wall of the insertion part 31 is provided with a plurality of openings 311, and the plurality of openings 311 form a bidirectional helical distribution, wherein a row of helical distribution openings have different liquid outlet directions. Several openings form a plurality of refrigerant injection positions in the length direction and radial direction of the header 1, and the openings in another row of helical distribution only change the helical direction.

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PUM

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Abstract

The invention discloses a heat exchanger, in particular a micro-channel heat exchanger. The heat exchanger solves the problem of uneven secondary inner refrigerant distribution of an existing micro-channel heat exchanger. The heat exchanger comprises a collecting pipe and a micro-channel flat tube mounted on the collecting pipe in plug-in a mode. The heat exchanger further comprises a refrigerant distributor, the refrigerant distributor comprises a plurality of liquid separation branch pipes, every liquid separation branch pipe is provided with an insertion portion for being inserted into the interior space of the collecting pipe through the side wall of the collecting pipe, the insertion portion is provided with an opening, refrigerant flows into the interior space of the collecting pipe through the opening, and an included angle is formed between the liquid outlet direction of the opening and the liquid inlet direction of the micro-channel flat tube.

Description

technical field [0001] The invention relates to a heat exchanger, especially a microchannel heat exchanger. Background technique [0002] Microchannel heat exchangers are also called flat tube or parallel flow heat exchangers. This type of heat exchanger generally has an inlet header and an outlet header, which are distributed at intervals between the inlet header and the outlet header. Several flat tubes and fins in the middle of the flat tubes. In practical applications, the airflow flows through the surface of the heat exchanger and exchanges heat with the flat tubes and fins. During the heat exchange, the refrigerant evaporates or condenses, and the external airflow decreases. Appropriate temperature or increased temperature, such as air conditioners, freezers, etc. [0003] When the heat exchanger is working, the refrigerant fluid is distributed to each flat tube through the inlet header. The ideal state is: the refrigerant fluid is evenly distributed into each flat tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/00
Inventor 汪峰何国平章小剑
Owner ZHEJIANG DUNAN THERMAL SCI & TECH