Spiral groove heat exchange tube

A technology of spiral grooves and heat exchange tubes, applied in the direction of heat exchangers, indirect heat exchangers, heat exchanger types, etc., can solve problems such as powerlessness, achieve large cooling effect, improve emission performance indicators, and meet high environmental protection emission requirements Effect

Inactive Publication Date: 2007-09-12
BEIJING U BRIDGE CHAOYANG
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Problems solved by technology

However, with the increasing requirements of environmental protection regulations on automobile exhaust emissions, the heat exchange effect of this circular spiral groove heat exchange tube can no longer meet the future restrictions on the generation and emission of nitrogen oxides in automobiles. The requirements increase by dozens or even hundreds of times. For the current increasingly stringent emission requirements and fierce competition in the economic market, in the engine exhaust gas recirculation cooling system with limited installation space, the circular cross-sectional shape of the spiral groove heat exchange The tube has become overwhelmed

Method used

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  • Spiral groove heat exchange tube
  • Spiral groove heat exchange tube
  • Spiral groove heat exchange tube

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Embodiment Construction

[0023] 3 and 4 are respectively a three-dimensional structural schematic diagram and a cross-sectional shape schematic diagram of the first embodiment of the present invention. In the figure, the heat exchange tube is a stainless steel tube body 2 with an inwardly protruding spiral groove 21 on the surface. 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, an arc-shaped transition connection with a radius of R is set between the adjacent two sides of the heat exchange tube, and the heat exchange tube Except the cross-sectional shape of the spiral groove, the cross-sectional shape of the stainless steel pipe body 2 is a rectangle, its height and width are not equal, and the adjacent two sides are connected by an arc transition, as shown in Figure 4, where a is the cross-section Height; the spiral protrusion can be more than one; the cross-sectional...

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Abstract

The invention relates to a kind of spiral groove heat-exchange pipe which includes stainless steel tube, and there are inward bossed spiral grooves in its surface. And the height and the width of the section shape of the stainless steel tube are unequal. In the circulation system of waste gas of automobile engine, the spiral groove whose section shape is unequal in the height and width is used in the heat-exchange tube of condenser so that making the condenser get high heat-exchange energy efficiency. Meanwhile, it's hard to accumulate filth in the tube of the inner and the outer, which greatly improves the emission performance index of automatic engine, and is satisfied with the higher requirement of environmental protection emission.

Description

technical field [0001] The invention relates to a spiral groove heat exchange tube, in particular to a spiral groove heat exchange tube with cross-sectional shapes with height and width not equal, which is applied in an exhaust gas recirculation cooling system of an automobile engine. Background technique [0002] Exhaust gas recirculation cooling technology is an effective and reliable technology for reducing the emission of nitrogen oxides from diesel engines. Its working principle is: after the temperature of exhaust gas is lowered by the cooler, it is returned to the combustion chamber of the engine to reduce combustion. The temperature of the chamber, thereby reducing the generation and emission of nitrogen oxides. Among them, the cooler is a key component in the exhaust gas recirculation system, and its heat exchange efficiency determines the temperature of the recirculated exhaust gas. Therefore, how to improve the heat exchange efficiency of the exhaust gas recircula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/02F28F1/10F28F13/08
CPCF02M25/0714F28D7/026F28F13/06F28D21/0003F28D7/106F02M25/0734Y02T10/121F28F1/06F28F1/02F02M26/11F02M26/29
Inventor 景建周景建坤杨晓瑗沈董浩
Owner BEIJING U BRIDGE CHAOYANG
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