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Crossing spiral recess heat-exchanging pipe

A technology of spiral grooves and heat exchange tubes, which is applied in heat exchange equipment, tubular elements, lighting and heating equipment, etc., can solve the problem that the heat exchange effect cannot meet the requirements, achieve a large cooling effect, and improve the effect of emission performance indicators

Active Publication Date: 2009-03-18
辽宁联友博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the reality that environmental protection regulations have doubled the generation and emission of nitrogen oxides in automobile exhaust, the heat exchange effect of this circular spiral groove heat exchange tube can no longer meet the requirements; in order to achieve Emission standards and increasing strength in the increasingly fierce market competition require improvements to this commonly used spiral groove heat exchange tube with a circular cross-sectional shape

Method used

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  • Crossing spiral recess heat-exchanging pipe
  • Crossing spiral recess heat-exchanging pipe
  • Crossing spiral recess heat-exchanging pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention, figure 2 It is a schematic cross-sectional shape diagram of the first embodiment of the present invention. Such as figure 2 As shown, in order to make full use of the surface of the heat exchange tube to achieve heat exchange with maximum efficiency, and to facilitate production and processing, in this embodiment, when the spiral groove is removed from the heat exchange tube body, the opposite long sides and opposite sides in the section of the heat exchange tube The short sides are all arranged in an arc shape, and the long sides are smoothly connected with the short sides. The outer surface of the tube body 1 of the heat exchange tube has inwardly recessed intersecting spiral grooves 2 and 3, while the inner surface of the tube body 1 has indented intersecting spiral recesses corresponding to the grooves on the outer surface. The two ends of 1 a...

Embodiment 2

[0027] image 3 , 4 Shown are the three-dimensional structure schematic diagram and the cross-sectional shape schematic diagram of the second embodiment of the present invention respectively. The difference between this embodiment and the above-mentioned first embodiment is that the cross-sectional shape of the stainless steel pipe body is flat, the two opposite long sides are straight lines, and the opposite short sides are arc-shaped recessed semicircular arc surfaces from the inside to the outside, such as Figure 4 Shown; Other parts are identical with embodiment one. Such a setting can improve heat exchange efficiency.

[0028] Compared with the round tube, the flat tube is not centrosymmetric. The distance between the geometric center of the flat spiral tube and the tube wall is smaller than the distance between the circular spiral tube and the tube wall. Most of the fluid in the tube can participate in heat exchange. Moreover, the shape of the flat tube enhances the ...

Embodiment 3

[0030] Figure 5 , 6 Shown are the three-dimensional structure schematic diagram and the cross-sectional shape schematic diagram of the third embodiment of the present invention respectively. This embodiment is a modification on the basis of the first embodiment. The entire cross-section of the heat exchange tube is smoothly connected, that is, for the convenience of processing, the cross-sectional shape of the spiral groove is removed, and the The cross-sectional shape is set to an ellipse; other parts are the same as the first embodiment.

[0031] The non-central symmetry of the flat spiral tube is different from that of the circular spiral tube. Different arrangements can produce different effects. Therefore, according to different needs, there are many ways to arrange the heat exchange tubes. The tubes are arranged in parallel, staggered, or both in parallel and staggered. Different arrangements make the flow of the coolant outside the tubes disturbed differently, which ...

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Abstract

The invention relates to a cross screw groove heat-exchanger, which comprises the following parts: a stainless steel tube body and a screw groove, wherein the tube body is equipped with the screw groove, the screw groove isn't less than two cross screw grooves, the screw groove is equipped continuously or discontinuously, the cross section of the screw groove is U shape, V shape or circular arc, the cross section of the tube body is circular or ribbon with the different height and width, two ends of the tube body is equipped with smooth section. The invention is fit for the exhaust gas recirculation chiller of the car engine, which improves the heat-transfer efficiency of the chiller, improves the discharge performance index of the car engine, and reduces the maintenance cost and the change rate.

Description

technical field [0001] The invention relates to a cross-helical groove heat exchange tube, which is especially suitable for being applied to an exhaust gas recirculation cooler of an automobile engine or an intercooler of a turbocharger, and has a flat cross-sectional shape with unequal height and width Cross spiral groove heat exchange tubes. Background technique [0002] Exhaust gas recirculation cooling system is one of the key high-tech technologies for automobile engines to meet the increasingly stringent world environmental protection standards to control nitrogen oxide (NOx) emissions, and it will surely become a necessary equipment for automobile engines at home and abroad to meet emission requirements. [0003] Exhaust gas recirculation cooling technology is to cool part of the exhaust gas emitted by the automobile engine through the exhaust gas recirculation cooler, and then return it to the combustion chamber of the engine for recycling, which not only introduces ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/06F28F1/12
Inventor 景建周景建坤杨晓瑷汤俊洁沈董浩
Owner 辽宁联友博科技有限公司
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