Serpentine tube microchannel heat exchanger

A technology of microchannel heat exchangers and serpentine tubes, applied in lighting and heating equipment, evaporators/condensers, refrigerators, etc. Problems such as large process flow, to achieve the effect of improving heat exchange efficiency, various layout methods, and increasing temperature difference

Active Publication Date: 2019-12-27
SANHUA(HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single flat tube of the micro-channel serpentine heat exchanger is longer, and the flow of the refrigerant is larger, so the serpentine heat exchanger often has an excessive pressure drop on the refrigerant side
When the compressor power of the refrigeration system is rated, the pressure drop on the refrigerant side will affect the refrigerant condensation temperature or evaporation temperature of the heat exchanger, the temperature difference between the refrigerant and the air side will be significantly reduced, the heat transfer efficiency will be reduced, and the heat transfer capacity will not meet the requirements , which limits the application occasions of the microchannel serpentine heat exchanger

Method used

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  • Serpentine tube microchannel heat exchanger
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  • Serpentine tube microchannel heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] figure 1 The structure of the serpentine tube microchannel heat exchanger 100 in the first embodiment is shown.

[0057] In Embodiment 1, the serpentine tube microchannel heat exchanger 100 includes an inlet header 11 and an outlet header 12 parallel to each other, and the two headers 1 are respectively formed as circular tubes.

[0058] Each header 1 is provided with a set of first hole groups A, the first hole group A includes two flow holes 13, and the central axes of the two flow holes 13 in each first hole group A are in the corresponding The projections on the central axis of the header 1 coincide. The long side of each flow hole 13 is substantially parallel to the axial direction of the corresponding header 1 .

[0059] The central axes of the two flow holes 13 are symmetrical to the central axis of the corresponding header 1 , or in other words, the included angle between the central axes of the two flow holes 13 on the cross section of the header 1 is 180 deg...

Embodiment 2

[0062] figure 2 and image 3 The structure of the header 1 of the serpentine tube microchannel heat exchanger 100 in the second embodiment is shown.

[0063] In the second embodiment, the collecting pipe 1 is formed as a round pipe, and the collecting pipe 1 is provided with a first hole group A, and the first hole group A includes two flow holes 13, and two of the first hole group A The projections of the central axes of the flow holes 13 on the central axes of the corresponding headers 1 coincide, and the long sides of each flow hole 13 are substantially parallel to the axial direction of the corresponding headers 1 . Therefore, the cross-section of the header 1 is not limited by the width of the flat tube 2, and the diameter of the header 1 can be as small as possible under the conditions of pressure bearing capacity and welding, so as to save the material cost of the header 1.

[0064] In the second embodiment, the included angle between the projections of the central a...

Embodiment 3

[0067] Figure 4 The structure of the header 1 in the third embodiment is shown, the structure of the header 1 is substantially the same as that of the header 1 of the second embodiment, the difference is that in the third embodiment, each header 1 A reinforcing rib 14 is connected between the two flow holes 13, and the shape of the reinforcing rib 14 can also be called a reinforcing rib to enhance the pressure bearing capacity.

[0068] The third embodiment is proposed for illustration. In the embodiments of the present invention (including the other eight embodiments), a reinforcing rib 14 is connected between at least two flow holes 13 on each header 1 .

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Abstract

The invention discloses a serpentine tube microchannel heat exchanger. The serpentine tube microchannel heat exchanger comprises two flow gathering tubes and a plurality of flat tubes. Each flow gathering tube is provided with a plurality of circulating holes, and at least two circulating holes in each flow gathering tube are arranged in a staggered mode in the circumferential direction. The multiple flat tubes are in parallel connection with the position between the two flow gathering tubes, at least a part of each flat tube extends in a serpentine mode or extends around the flow gathering tubes, the two ends of each flat tube are connected with the circulating holes in the two flow gathering tubes correspondingly, the multiple flat tubes and the multiple circulating holes in each flow gathering tube are arranged in one-to-one correspondence mode. According to the serpentine tube microchannel heat exchanger, the length of a single refrigerant flow path can be shortened to reduce the side flow resistance and pressure drop of a refrigerant of the heat exchanger. A refrigeration system using the heat exchanger can improve the heat exchanging efficiency. In addition, the arrangement form of the flat tubes of the heat exchanger is various according to the different environmental conditions such as the mounting space size, and the application occasion of the serpentine tube microchannel heat exchanger can be enlarged.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a serpentine tube microchannel heat exchanger. Background technique [0002] In recent decades, the air-conditioning industry has developed rapidly, and heat exchangers, as one of the main components of air-conditioning, also need to be improved and optimized according to market requirements. The micro-channel heat exchanger has the characteristics of high cooling efficiency, small size, light weight, and strong pressure resistance, which can well meet the requirements of the market. [0003] The microchannel heat exchanger is mainly composed of microchannel flat tubes, cooling fins and headers. There are headers at both ends of the microchannel flat tubes for distributing and collecting refrigerant. Corrugated or shutter-shaped cooling fins are arranged between adjacent microchannel flat tubes to enhance the heat exchange efficiency between the heat exchanger and the air...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/00
CPCF25B39/00
Inventor 王芳王艳红
Owner SANHUA(HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO LTD
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