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Finned tube type heat exchanger inner lining with foam metal

A technology of metal foam and finned tubes, which is applied in the direction of tubular elements, heat transfer modification, heat exchange equipment, etc., can solve the problems that the heat exchange area cannot be greatly increased, and the enhanced heat exchange in the tube encounters bottlenecks, etc., to achieve reduction The effect of small volume, increased cost and material saving

Inactive Publication Date: 2008-07-23
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the heat exchange area in the tube cannot be greatly increased, so that the enhanced heat transfer in the tube encounters a bottleneck

Method used

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  • Finned tube type heat exchanger inner lining with foam metal

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specific Embodiment approach

[0025] Cut the cylindrical metal foam 2 whose length is the same as that of the metal pipe 1 and whose diameter is slightly larger than the inner diameter of the metal pipe 1 (the axial section is shown in Figure 1a). Fix the metal tube 1, push the cylindrical metal foam 2 into the metal tube 1 along the axial direction of the tube, and at the same time use a wire to connect with the end of the columnar metal foam 2 entering the metal tube 1, and help overcome the problem by pulling the metal wire. The frictional resistance between the metal foam 2 and the pipe wall until the metal foam 2 is completely embedded in the metal pipe 1. Since the diameter of the columnar metal foam 2 is slightly larger than the inner diameter of the metal tube 1, the edge of the metal foam 2 will be squeezed and deformed, so as to be more tightly combined with the inner wall of the metal tube 1. Of course, other methods can also be used to fill the metal foam 2 In the metal tube 1, as long as the t...

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Abstract

The invention relates to a finned tube heat exchanger of lining foam metal in the refrigeration technical field, which comprises exterior metal fins, metal tubes and foam metal; wherein the inner tube is filled with the foam metal so as to improve the heat exchange performance of the inside of the heat exchange tube. The inside of the foam metal is provided with a hole for the circulation of the air or liquid medium. The lining shape of the foam metal inside the metal tube can be one, two or three among the total cross-section shape, inner ring shape or the shape of thinness at the upward side and thickness at the lower part. The finned tube heat exchanger of lining foam metal in the refrigeration technical field has the advantages that: the heat transfer effect is obviously better than that of the prior finned tube heat exchanger; thereby the area of the heat exchanger is reduced; the material is saved; the volume and material consumption of the heat exchanger can be reduced by 20 percent to 40 percent respectively; moreover, compared with the prior widespread use finned tube heat exchanger, the cost increase is less.

Description

technical field [0001] The invention relates to a heat exchanger in the technical field of refrigeration, in particular to a finned tube heat exchanger lined with foam metal. Background technique [0002] Finned tube heat exchanger is a form of heat exchanger widely used in refrigeration, air conditioning, chemical and other industrial fields. The finned tube heat exchanger is composed of metal fins and metal tubes. Multiple metal fins with the same shape are distributed in parallel. Multiple metal tubes pass through all the metal sheets. The fluid in the tubes flows in their respective tubes, and the tubes do not interact with each other. Blending, the fluid (usually gas) outside the tube flows in the space formed by the tube and the metal sheet. Taking the application in room air conditioners as an example, finned tube heat exchangers have been widely used as evaporators and condensers. When used as an evaporator, the refrigerant evaporates into gas in the tube, and the ...

Claims

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Application Information

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IPC IPC(8): F25B39/00F28F1/42
CPCF28F1/40F28F1/42F28F13/003
Inventor 丁国良朱禹
Owner SHANGHAI JIAO TONG UNIV
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