WO2001063197A1

WO2001063197A1 - Heat-exchange pipe

Info

Publication number: WO2001063197A1
Application number: PCT/KR2000/000813
Authority: WO
Inventors: Yeon Mook Choi
Original assignee: Yoo-O T & C Corp Ltd
Current assignee: Yoo-O T & C Corp Ltd
Priority date: 2000-02-21
Filing date: 2000-07-27
Publication date: 2001-08-30
Anticipated expiration: 2002-08-21
Also published as: KR20000024564A; AU6185100A

Abstract

The present invention relates to a heat-exchange pipe with improved heat-exchanging efficiency. According to the present invention, a heat-exchange pipe is provided with an internal pin with a multiple of projecting parts contacting the internal wall of the pipe, thus transmitting the heat of fluid from inside to outside of the pipe through the internal pin. Therefore, an internal pin installed inside the pipe can reduce manufacturing costs, enhance heat-exchanging efficiency of fluid passing through the pipe, and easily remove impurities of fluid accumulated inside the pipe.

Description

HEAT-EXCHANGE PIPE

Technical Field

The present invention relates to a heat-exchange pipe and particularly to a heat-exchange pipe with improved heat- exchanging efficiency.

Background Art

In a conventional heat exchange pipe, fluid in a state of gas or liquid with a constant temperature flows through a heat-exchange pipe, thus cooling or heating areas surrounding the pipe. Such a conventional heat-exchange pipe is widely used in cooling cycle equipment, waste-gas treatment equipment, etc.

As seen in Figs la and lb, a conventional heat-exchange pipe (10) is formed with a multiple of grooves (12) so that an inside surface of the pipe (10) can be increased and the heat of fluid inside the pipe (10) can be easily transmitted to the outside of the pipe (10) . The pipe (10) is manufactured by a method of extrusion molding, a multiple of grooves (12) are formed inside the pipe, and the diameter of a projecting part formed between grooves (12) inside the pipe (10) is more than 1.0 mm in thickness. However, such a conventional heat-exchange pipe (10) is hard and expensive to manufacture because the diameter of a projecting part formed between a multiple of grooves (12) of a heat-exchange pipe (10) should be more than 1.0 mm. A conventional heat-exchange pipe (10) has a disadvantage to have limitation in increasing a heating surface area and not to improve heat-exchanging efficiency as desired because the number of the grooves (12) inside the pipe (10) is limited. A conventional heat-exchange pipe has a further disadvantage in that although impurities in fluid passing through a pipe (10) accumulate inside the grooves of the pipe (10), it is hard to remove impurities.

Disclosure of the Invention

It is therefore an object of this invention to provide a heat-exchange pipe which is easily manufactured and therefore more economical than a conventional device. Another object of this invention is to provide a heat- exchange pipe with improved heat-exchanging efficiency of fluid that is passing through the pipe.

It is a further object of this invention to provide a heat-exchange pipe whose accumulated impurities can be easily removed. In order achieve the above objects, a near-exchange pipe according to the present invention comprises a*^~- internal pin with a multiple of projecting parts so that the heat of fluid inside the pipe can be transmitted to the outsiαe of the pipe through the internal pin.

The internal pin is formed from pressuring an elastic plate with a multiple of projecting parts in one direction and thus overlapping the both ends of the elastic plate.

The internal pin can be installed when a multiple of elastic internal division pins are pushing eacr other because of their elastic property.

In order to increase a contact surface to fluid, more projecting parts m addition to the existing projecting parts can be formed on the internal pin.

Brief Description of the Drawings

Figure 1-a is a perspective view of a conventional heat- exchange pipe . Figure 1-b is a cross-sectional view of a conventional heat-exchange pipe.

Figures 2a to 6a are perspective views snowing a first embodiment of the heat-exchange pipe according to the present invention. Figures 2b to 6b are cross-sectional views showing a first embodiment of the heat-exchange pipe according to the present invention.

Figures 7a to 10a are perspective views showing a second embodiment of the heat-exchange pipe according to the present invention.

Figures 7b to 10b are cross-sectional views showing a second embodiment of the heat-exchange pipe according to the present invention.

Reference Numerals 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 : pipe

12 groove

22, 32, 42, 52, 62, 76, 86, 96, 106 internal pin

24, 34, 44, 54, 64, 74, 84, 94, 104 projecting part

72, 82, 92, 102 : internal division pin

Best Mode for Carrying out the Invention

Next, a detailed description will hereinafter be given of a heat-exchange pipe, with reference to the drawings and specific embodiments.

A heat-exchange pipe according to the present invention is provided with an internal pin so that a contact surface to the fluid inside pipe can be increased and the heat of fluid inside the pipe can be easily transmitted to the outside of the pipe. First Embodiment

Figures 2a to 6a are perspective views and Figures 2b to 6b are cross-sectional views showing a first embodiment of the heat-exchange pipe according to the present invention. In a first embodiment, a pipe is provided with an internal pin which is formed from pressuring an elastic plate with a multiple of projecting parts thereon in one direction, both ends of the plate being overlapped, thereby allowing part of the multiple of projecting parts to contact an internal wall of the pipe.

With reference to Figs. 2a and 2b, a pipe (20) is provided with an internal pin (22) , wherein an elastic plate with a multiple of cylinder-shaped projecting parts (24) is pressured m one direction and therefore, both ends of the plate are overlapped.

The internal pin may be made of less than 1 mm thick stainless steal, nonferrous metals, ferrous metals, etc. When the internal pin (22) is installed inside the pipe (20), some projecting parts (24) contact the internal wall of the pipe (20) because of their elastic property while others remain inside the pipe (20) .

The heat-exchange pipe of the present invention enhances heat-exchanging efficiency because the internal pin (22) is installed inside the pipe (20) and projecting parts (24) are formed on the internal pin (22) to increase a heating surface to fluid. The heat of the fluid inside the pipe (20) is transmitted to the outside of the pipe (20) through the pipe (20), and the heat transmitted to the internal pin (22) is transmitted through projecting parts (24) of the internal pin (22) to the outside of the pipe (20) .

Although the number of projecting parts (24) is defined in the embodiment, more projecting parts (24) can be formed, thus increasing a heating surface area of the internal pin (22) to fluid and improving heat-exchanging efficiency of fluid.

The heat-exchange pipe in the embodiment can be easily and economically manufactured because the internal pin (22) is installed inside the cylinder-shaped pipe (20) . According to the heat-exchange pipe in the embodiment, as grooves are not formed inside the pipe (20) as i a conventional device, impurities can be easily removed. Further, if impurities in fluid are accumulated inside or outside the internal pin (22), they can be easily removed by pulling the internal pin (22) out of the pipe (20) .

With reference to Figs 3-a to 6-a and 3-b to 6-b, each case has a different shape of a projecting part (34, 44, 54, 64) but has similar effects in that an internal pin (32, 42, 52, 62) is installed inside a pipe (30, 40, 50, 60) . As seen in Figs 3-a and 3-b, the lower part cf a projecting part is rounded while the upper part thereof is folded at right angles into the shape of tr . ] _s seen in Figs 4-a and 4-b, a projecting part (44) is in the shape of a folded line at a regular angle. As seen in Figs 5-a and 5-b, a projecting part (54) is in the shape of trapezoid. As seen in Figs 6-a and 6-b, the lower and upper parts of a projecting part are respectively in the shape of tr _at right angles.

Second Embodiment Figs. 7a to ICa are perspective views showing a second embodiment of the heat-exchange pipe according to the present invention and Figs. 7b to 10b are cross-sectional views thereof. In a second embodiment, an internal pin (76, 86, 96, 106) comprises a multiple of elastic internal division pins (72, 82, 92, 102) which are installed inside of a pipe (70, 80, 90, 100) and push each other because of elastic property.

With reference to Figs 7-a and 7-b, a pipe (70) is provided with a multiple of elastic internal division pins

(72) made of less than 1 mm thick stainless steel, nonferrous metals, ferrous metals, etc., having projecting parts (74) in the shape of a folded line with a regular angle, thereby forming an internal pin with a large heating surface area to fluid. Herein, the projecting parts (74) of the internal division pins (72) are positioned toward the center of the pipe, the lower part of the internal division pins (72) is toward the inside wall of the pipe (70), and adjacent internal division pins (72) form the internal pm (76) by pushing each other because of elastic property. The internal division pins (72) contacting the inside wall of the pipe (70) are adjacent to other internal division pins (72), thus forming another projecting part.

The heat-exchange pipe of the present invention enhances heat-exchanging efficiency because the internal pin (76) is installed inside the pipe (70) and projecting parts contact the inside wall of the pipe (70) to increase a heating surface to fluid. The heat of the fluid inside the pipe (70) is transmitted to the outside of the pipe (70) through the pipe (70) , and the heat transmitted to the internal pin (76) is transmitted to the outside of the pipe (70) through projecting parts which are formed from contact between the lower parts of the internal division pm (72) .

The heat-exchange pipe in the embodiment is easy and economical to manufacture by installing a multiple of internal division pins (72) m the shape of a folded line with a regular angle inside the pipe (70) .

According to the heat-exchange pipe m the embodiment, impurities can be easily removed since grooves are not formed inside the pipe (70), as opposed to a conventional device. Further, if impurities in fluid are accumulated inside or outside an internal pin (76) , they can be easily removed oy pulling the internal pm (76) out of the pipe (70) .

Next with reference to Figs 8-a to 10-a and 8-b to 8-b, each case has a different shape of a projecting part (84, 94,

104) of an internal division pin (82, 92, 102) but has similar effects in that an internal pin (86, 96, 106) is installed inside a pipe (80, 90, 100) .

As seen m Figs 8-a and 8-b, a projecting part (84) of an internal division pm (82) is the shape of trapezoid. As seen Figs 9-a and 9-b, a projecting part (94) of an internal division pm (92) is in the shape of ^c and each end of the projecting part (94) is folded. As seen in Figs 10-a and 10-b, a projecting part (104) of an internal division p (102) is in the shape of arc.

Industrial Applicability

As apparent from the above description, a heat-exchange pipe according to the present invention can be easily manufactured and produced by installing internal pm inside the pipe, have improved heat-exchangmg efficiency of fluid by increasing a heating surface area contacting fluid passing through a pipe, and remove impurities accumulated inside the pipe by separating internal pm from the pipe.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims .

Claims

Claims :

1. A heat-exchange pipe comprising an internal pin with a multiple of projecting parts contacting the inside wall of the pipe, thus transmitting heat of fluid inside the pipe to the outside through said internal pin.

2. A heat-exchange pipe as set forth in Claim 1, wherein an elastic plate having a multiple of said projecting parts thereon is pressured in one direction to overlap both ends of said plate, thereby forming said internal pin.

3. A heat-exchange pipe as set forth in Claim 1, wherein said internal pin comprises a multiple of elastic internal division pins which are pushing each other because of their elastic property.

4. A heat-exchange pipe as set forth in Claims 2 and 3, wherein more projecting parts can be formed in addition to said projecting parts on said internal pin, thereby increasing a contact surface of said fluid.