Micro-channel flat tube, micro-channel heat exchanger and air conditioner

A technology of micro-channel and micro-porous channel, applied in evaporator/condenser, tubular element, heat exchange equipment, etc., can solve the problems of small number of micro-pores, uneven wall thickness, ineffective heat exchange, etc. The effect of deformation capacity, increasing total cross-sectional area, and improving heat exchange efficiency

Active Publication Date: 2021-11-30
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microchannel flat tubes used in microchannel heat exchangers are mostly made of aluminum. However, due to material and structural reasons, the strength of the microchannel flat tubes is low, causing deformation and other problems to occur frequently.
In addition, the heat exchange efficiency of the currently used microchannel heat exchangers such as rectangular micropores, oval micropores and triangular micropores is still low and needs to be further improved.
[0003] There is a microchannel flat tube with hexagonal micropores, but because it is only arranged in a single row, the wall thickness of each micropore is uneven, the heat transfer is not ineffective and the heat transfer effect is poor, and because of its arrangement The direction is arranged sequentially along the width direction of the flat tube, so the number of micropores in the flat tube is small and the heat transfer efficiency is low

Method used

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  • Micro-channel flat tube, micro-channel heat exchanger and air conditioner
  • Micro-channel flat tube, micro-channel heat exchanger and air conditioner
  • Micro-channel flat tube, micro-channel heat exchanger and air conditioner

Examples

Experimental program
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Effect test

no. 1 example

[0054] see Figure 1 to Figure 3 , The air conditioner in this embodiment includes a microchannel heat exchanger, and the microchannel heat exchanger includes a plurality of microchannel flat tubes 1 arranged in parallel.

[0055] The microchannel flat tube 1 includes a honeycomb micropore channel 10 , and the micropore channel 10 includes a first micropore unit 2 , a second micropore unit 3 , a third micropore unit 4 and a fourth micropore unit 5 .

[0056] The first microhole unit 2 includes a plurality of first microhole groups 21 and a plurality of second microhole groups 22, along the width direction Y (ie the second direction) of the microchannel flat tube 1, the first microhole groups 21 and The second microhole groups 22 are arranged alternately in sequence.

[0057] Each first microhole group 21 includes a first microhole 20 , and each second microhole group 22 includes a first microhole 20 . The first microholes 20 all extend along the length direction X (i.e. the ...

no. 2 example

[0078] As the description of the second embodiment of the microchannel flat tube, microchannel heat exchanger and air conditioner of the present invention, only the difference from the first embodiment of the above microchannel flat tube, microchannel heat exchanger and air conditioner will be given below illustrate.

[0079] see Figure 9 , in this embodiment, the first micropore unit 200 includes a plurality of first microhole groups 221 and a plurality of second microhole groups 222, and each first microhole group 221 includes a plurality of first microhole groups arranged along the thickness direction Z. Microholes 220 , each second microhole group 222 includes a plurality of first microholes 220 arranged along the thickness direction Z. The number of first microholes 220 in each first microhole group 221 is one more than the number of first microholes 220 in each second microhole group 222. In this embodiment, the number of first microholes 220 in each first microhole gr...

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PUM

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Abstract

The invention provides a micro-channel flat tube, a micro-channel heat exchanger and an air conditioner. The micro-channel flat tube comprises a honeycomb-shaped micro-pore channel, and the micro-pore channel comprises a first micro-pore unit, a second micro-pore unit and a third micro-pore unit; the first micro-pore unit comprises multiple first micro-pores, the first micro-pores extend in the first direction, and the cross section of each first micro-pore is in a regular hexagon shape; the second micro-pore unit comprises multiple second micro-pores which are arranged at intervals in the second direction; the third micro-pore unit comprises multiple third micro-pores which are arranged at intervals in the second direction; and the cross sections of the second micro-pores and the third micro-pores are in shapes of isosceles trapezoids, the second micro-pores and the third micro-pores extend in the first direction, and the second micro-pore unit and the third micro-pore unit are arranged on the two opposite sides, in the thickness direction of the micro-channel flat tube, of the first micro-pore unit correspondingly. The micro-channel flat tube can ensure the strength and meanwhile remarkably improve the heat exchange efficiency.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a microchannel flat tube, a microchannel heat exchanger and an air conditioner. Background technique [0002] Due to the excellent heat transfer characteristics and cost advantages of micro-channel heat exchangers, the usage rate of micro-channel heat exchangers in household and commercial air conditioners is increasing. The micro-channel flat tubes used in micro-channel heat exchangers are mostly made of aluminum, but due to material and structural reasons, the strength of the micro-channel flat tubes is low, resulting in frequent deformation and other problems. In addition, the heat exchange efficiency of the currently used microchannel heat exchangers such as rectangular micropores, oval micropores and triangular micropores is still low and needs to be further improved. [0003] There is a microchannel flat tube with hexagonal micropores, but because it is only arranged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/02F25B39/00
CPCF28F1/022F25B39/00
Inventor 李丽霞宋美琪
Owner GREE ELECTRIC APPLIANCES INC
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