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Inner fin and flat tube including an inner fin

a technology of flat tubes and inner fins, which is applied in the direction of tubular elements, lighting and heating apparatus, stationary conduit assemblies, etc., to achieve good inner pressure resistance of flat tubes, good heat transfer, and cost-effective manufacturing

Inactive Publication Date: 2021-08-12
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an inner fin for a flat tube that allows for better heat transfer and pressure resistance compared to previous designs. The inner fin can be manufactured cost-effectively while still maintaining its strength. The flat tube with the inner fin is also cost-effective while providing good inner pressure resistance and heat transfer.

Problems solved by technology

In this context, however, the focus is on the flat tube in terms of the cost and the weight of the heat exchanger, due to the flat tube's frequent use in a heat exchanger.

Method used

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  • Inner fin and flat tube including an inner fin
  • Inner fin and flat tube including an inner fin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

1 shows a sectional view of a flat tube 1, including a tube wall 2 and a tube interior 3. Tube wall 2 is formed, for example, from a sheet material strip 4, which is deformed. Sheet material strip 4 may thus be designed as a folding tube and be soldered, as illustrated, or the flat tube may alternatively also be designed as a welded tube.

[0025]Tube wall 2 has two oppositely situated wide sides 5 and two oppositely situates narrow sides 6, which are arranged alternately in a circumferential manner. Flat tube 1 in the illustrated exemplary embodiment is closed on one of the two narrow sides 6, an overlap of end areas of sheet material strip 4 being formed, which overlap each other and are soldered in this location.

[0026]An inner fin 7 is arranged in tube interior 3. Inner fin 7 is formed from a metallic flat strip, which is, for example, rolled to form its structure. For example, metallic strip is formed from aluminum, an aluminum alloy, from steel, etc.

[0027]Inner fin 7 is provided w...

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PUM

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Abstract

An inner rib, in particular for a flat tube, in particular of a heat exchanger, made from a metallic flat strip, which is shaped in a wavy modulated manner, having a large number of wave crests and wave troughs, which are each arranged alternately in a longitudinal direction of the inner fin, an essentially straight, web-like fin area being provided between one wave crest and an adjacent wave trough and connecting the wave crest to the wave trough, the metallic flat strip having a first strip thickness L1, which is essentially constant in the area of the wave crests and the wave troughs, the flat metallic strip having a second strip thickness L2, which is provided in the area of the web-like fin area, L2 being smaller than L1.

Description

[0001]This nonprovisional application claims priority under 35 U.S.C. § 119(a) to German Patent Application No. 10 2020 201 556.2, which was filed in Germany on Feb. 7, 2020 and which is herein incorporated by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to an inner fin and a flat tube, in particular for a heat exchanger, in particular for a motor vehicle.Description of the Background Art[0003]In heat exchanges for motor vehicles, flat tubes are known, in which an inner fin is inserted or introduced into the tube interior of the flat tube, which abuts and is soldered on the oppositely situated wide sides of the flat tube, so that the flat tube achieves an increased inner pressure resistance. For this purpose, the inner fin is modulated, for example in a wavy manner, including a large number of wave crests and wave troughs, which are each alternately soldered to the wide sides of the flat tube in an abutting manner.[0004]The inner fin...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F28F1/40F28D1/053
CPCF28F1/40F28F2275/06F28F2275/025F28D1/0535F28F1/022F28F21/081F28D1/0391F28D1/05366F28D2021/008F28F1/02F28F2275/04F28F2275/02
Inventor SCHENK, FRANK-HEINERSEITZ, MATTHIAS
Owner MAHLE INT GMBH