CN202938678U

CN202938678U - Efficient two-channel foldable flat tube with small convex hulls

Info

Publication number: CN202938678U
Application number: CN 201220634347
Authority: CN
Inventors: 陈永鸿
Original assignee: DEERFU AUTOMOTIVE AIR-CONDITIONER SYSTEM Co Ltd SHANGHAI
Current assignee: Sdaac Automotive Air Conditioning Systems Co ltd Shanghai
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-05-15
Anticipated expiration: 2022-11-27

Abstract

The utility model discloses an efficient two-channel foldable flat tube with small convex hulls. A plurality of small convex hulls at certain intervals are punched on a sheet, the small convex hulls are arranged on the inner surface when the sheet is bent, the small convex hulls are arranged on the inner surface of the flat tube when the sheet is folded into the flat tube with the cross section in a B shape, intervals are reserved between the small convex hulls and the inner surface of the flat tube and between the small convex hulls to prevent the small convex hulls and the inner surface of the flat tube from interfering and bonding each other, and convex faces of the small convex hulls are arranged on a water layer of the inner surface of the small convex hulls to destroy a boundary layer of the water layer on the inner surface of the flat tube. Thus, the thickness of the boundary layer is reduced, heat exchange area is increased, water side heat exchange coefficient is improved, and heat exchange performance of a heat exchanger is improved. The efficiency two-channel foldable flat tube with the small convex hulls enables performance of an existing radiator to be improved by 10-15% and can be widely applied to heat exchangers of automobile water tanks, intercoolers, heat exchangers and the like.

Description

Little convex closure two passages of a kind of window fold flat tube

Technical field

The utility model relates to a kind of radiator flat tube, in particular, relates to the folding flat tube of little convex closure two passages of a kind of window, can be widely used in the heat exchangers such as radiator, charge air cooler, heater.

Background technology

Prior art is produced the radiator flat tube and is adopted ratio-frequency welded tube or extruded tube mode, also do not have a kind of easy, lower-cost technique way to manufacture little convex closure at the flat tube inner surface, to destroy flat tube inner surface water layer boundary layer, reduce boundary layer thickness, increase heat exchange area, to increase the water side coefficient of heat transfer, improve the flat tube heat exchange property.

Summary of the invention

The utility model, for the technical problem existed in prior art, provides little convex closure two passages of a kind of window to fold flat tube, effectively improves the radiating efficiency of flat tube.

For achieving the above object, the technical scheme that the utility model adopts is as follows:

Little convex closure two passages of a kind of window fold flat tube, described flat tube is to go out some little convex closures that have each other certain intervals on a sheet material, the convex surface of little convex closure is towards folding surface, at the flat tube inner surface, the arrangement of little convex closure is such, between adjacent little convex closure, some intervals is arranged, and when sheet material is folded into B shape pipe, the upper and lower inner surface of flat tube all has little convex closure, between little convex closure and flat tube inner surface and between little convex closure and little convex closure, some intervals are arranged, the mutually noninterfere adhesion.

Described sheet material folding surface spraying one deck FLUX scaling powder, then become the flat tube of cross section Type B by Bending Processing repeatedly.

At sheet material bending joint, adopt soldering synthetic, two interchannel fluids of Type B can not circulate, and after being folded into B shape pipe, are assembled into radiator core body with the slice postwelding, the folding flat tube of little convex closure two passages of window becomes the B shape pipe of firm welding, and two interchannel fluids can not circulate.

Described sheet material adopts the two-sided composite bed aluminum alloy plate materials that has.

In the utility model, little convex closure convex surface, on flat tube inner surface water layer, to destroy flat tube inner surface water layer boundary layer, reduces boundary layer thickness, increases heat exchange area, to increase the water side coefficient of heat transfer, improves the flat tube heat exchange property.The folding more existing radiator of flat-tube radiator performance of little convex closure two passages of the utility model window has improved 10～15%.

The accompanying drawing explanation

Fig. 1 is the utility model flat tube cross-sectional structure schematic diagram;

Fig. 2 is the structural representation of many little convex closures of going out before folding of sheet material;

Fig. 3 is with the folding schematic diagram of little convex closure sheet material;

Fig. 4 is the little convex closure schematic diagram of flat tube folding seam face of the utility model one embodiment;

Fig. 5 is the schematic cross-section of Fig. 4 along U-U;

Fig. 6 is that the flat tube of another embodiment of the utility model does not have the little convex closure schematic diagram of folded seam face.

The specific embodiment

Below in conjunction with specific embodiment, further set forth the utility model.

Shown in Fig. 1～Fig. 3, little convex closure two passages of window disclosed in the utility model fold flat tube (28mmX1.65mm, two passages) be by a width 60.68mm, thickness 0.25mm is two-sided the composite bed aluminum alloy plate materials, first on sheet material, go out many little convex closures 1, as shown in Figure 2, little convex closure 1 area 1.4mmX1.4mm, little convex closure height 0.4mm.The convex surface of little convex closure is towards folding surface, is at the flat tube inner surface.The arrangement of little convex closure is such, between adjacent little convex closure, some intervals are arranged, sheet material is folded between the little convex closure of the upper and lower inner surface of B shape when pipe flat tube and flat tube inner surface and between little convex closure and little convex closure, some intervals is arranged, the mutually noninterfere adhesion, at sheet material folding surface spraying one deck FLUX scaling powder, pass through repeatedly Bending Processing along the fold line 2 shown in Fig. 2, finally become the cross section Type B, as shown in Figure 1.At Al-alloy plate joint, adopt soldering synthetic, two interchannel fluids can not circulate, and are assembled into radiator core body with the slice postwelding, and the folding flat tube of little convex closure two passages of window becomes the B shape pipe of firm welding, and two interchannel fluids can not circulate.Fig. 4, Fig. 5 are the little convex closure schematic diagram of flat tube with folded seam face 3, and Fig. 6 is that flat tube is not with the little convex closure schematic diagram of folded seam face 3.Little convex closure convex surface, on flat tube inner surface water layer, to increase the water side coefficient of heat transfer, improves the radiator heat exchange property; The folding more existing radiator of flat-tube radiator performance of little convex closure two passages of the utility model window has improved 10～15%.

The folding flat tube width of little convex closure two passages of the window of the present embodiment is 10～40mm, thickness is 1.0～8.0mm, the flat tube cross section is two channel B shapes, little convex closure area and height can be adjusted according to actual needs, sheet metal thickness can be according to the actual conditions adjustment, can be in order to the folding flat tube of little convex closure two passages of upper method processing window, to meet different needs.

Should be appreciated that, above-described embodiment only is not used in restriction scope of the present utility model for the utility model is described.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims limited range equally.

Claims

1. little convex closure two passages of window fold flat tube, it is characterized in that, described flat tube is to go out some little convex closures that have each other certain intervals on a sheet material, on the inner surface of the convex surface of little convex closure when the flat tube bending, when described sheet material being folded into to cross section and being B shape flat tube, the flat tube inner surface has little convex closure, between little convex closure and flat tube inner surface and between little convex closure and little convex closure, some intervals is all arranged, the mutually noninterfere adhesion.

2. the folding flat tube of little convex closure two passages of window according to claim 1, is characterized in that, described sheet material adopts soldering synthetic at the bending joint, and the two interchannel fluids up and down of B shape flat tube can not be circulated.

3. the folding flat tube of little convex closure two passages of window according to claim 1, is characterized in that, described sheet material is the two-sided composite bed aluminum alloy plate materials that has.