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Heat exchanger and its manufacturing method

a heat exchanger and manufacturing method technology, applied in the field of heat exchangers, can solve the problems of increasing the cost of heat exchangers, and achieve the effects of improving the reliability of heat exchangers, providing inexpensively, and being easy to manufactur

Inactive Publication Date: 2010-03-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]In the heat exchanger of the present invention, substrates and other substrates are alternately stacked. The former substrates have a plurality of long plates arranged substantially in parallel and slits disposed between the long plates. The latter substrates have a plurality of long plates arranged substantially in parallel, slits disposed between the long plates, and recesses disposed longitudinally continuously in one-side main surfaces of long plates. Thus, about half the total number of substrates requires only simple drilling, so that the structure and manufacturing process of the heat exchanger are simplified.
[0033]The manufacturing method of the heat exchanger of the present invention can provide a heat exchanger that is easy-to-manufacture and has high quality and reliability.

Problems solved by technology

However, for manufacturing the thin circular tubes, a precise processing device is required, and hence the heat exchanger becomes expensive.
Therefore, even when the heat exchanging performance of such a heat exchanger is high, the heat exchanger is extremely expensive, the reliability against the leak of the used fluid is not sufficient, and hence problems remain.

Method used

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  • Heat exchanger and its manufacturing method
  • Heat exchanger and its manufacturing method
  • Heat exchanger and its manufacturing method

Examples

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first exemplary embodiment

[0103]FIG. 1 is a front view of a heat exchanger in accordance with exemplary embodiment 1 of the present invention. FIG. 2 is a sectional view of a heat exchanging section in the direction orthogonal to the tube axis in the heat exchanger. FIG. 3 is a sectional view of the heat exchanging section in the tube axis direction in the heat exchanger.

[0104]In FIG. 1 through FIG. 3, the heat exchanger has heat exchanging section 1, and header sections 2 disposed at opposite ends of heat exchanging section 1. Heat exchanging section 1 has tubes 3 arranged in a grid shape, tube internal flow channels 4, and tube external flow channels 5. Header sections 2 include branch flow channels 6, inflow tube 7, and outflow tube 8. Tube internal flow channels 4 are connected to branch flow channels 6. Each tube 3 has a substantially square cross section, and has band-like long plate 9 and long plate 10 having U-shaped cross section. Each branch flow channel 6 is formed by continuously interconnecting ...

second exemplary embodiment

[0118]FIG. 11 is a perspective view of a heat exchanging section in accordance with exemplary embodiment 2 of the present invention.

[0119]FIG. 12 is a front view of a first substrate in accordance with exemplary embodiment 2. FIG. 13 is a front view of a second substrate in accordance with exemplary embodiment 2. The heat exchanging section is formed by alternately stacking first substrates 26 and second substrates 28. A plurality of first slits 30 and a plurality of second slits 40 are alternately arranged substantially in parallel on each first substrate 26. Third slits 50 having the same shape as that of first slits 30 are disposed on each second substrate 28 at the same positions as the projection positions of first slits 30.

[0120]First slits 30 and third slits 50 overlap each other on the projection plane and communicate with each other, thereby forming tube external flow channels 60. The longitudinal size of third slits 50 disposed on second substrate 28 is shorter than that o...

third exemplary embodiment

[0132]FIG. 19 is a perspective view of a heat exchanging section in accordance with exemplary embodiment 3 of the present invention. The heat exchanging section is formed by stacking first substrates 126 and second substrates 128 so that first substrates 126 are sandwiched between second substrates 128. First slits 130 and third slits 150 form tube external flow channels 160 similarly to embodiment 2. Second slits 140 and second substrates 128 form tube internal flow channels 170. Three first substrates 126 are stacked between second substrates 128 on the inflow side of the external fluid, two first substrates 126 are stacked between them in the intermediate part, and one first substrate 126 is disposed between them on the outflow side thereof. Thus, tube internal flow channels 170 are enlarged in the substrate stacking direction on the inflow side of the external fluid.

[0133]Three rows of first substrates 126 are disposed in the flow direction of the external fluid in embodiment 3;...

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Abstract

A heat exchanger is provided which has an easy-to-manufacture structure, is inexpensive, and has high quality and reliability while keeping high heat exchanging performance. The heat exchanger has first substrates (26) having first slits (30) and second slits (40) disposed substantially in parallel, and second substrates (28) having third slits (50) with substantially the same shape as that of first slits (30). The longitudinal length of second substrates (28) is set shorter than that of second slits (40). First substrates (26) and second substrates (28) are stacked so that first slits (30) communicate with third slits (50). First slits (30) and third slits (50) form tube external flow channels (60). Second slits (40) and second substrates (28) form tube internal flow channels (70). The heat exchanging section including only tubes can be formed of substrates having a slit, so that the heat exchanger can be manufactured easily and inexpensively.

Description

TECHNICAL FIELD[0001]The present invention relates to a heat exchanger for a cooling system, a heat radiation system, and a heating system, and more particularly to a heat exchanger of liquid and gas used in a system such as an information device requiring compactness.BACKGROUND ART[0002]Conventionally, a heat exchanger formed of tubes and fins is generally used. For aiming at compactness, recently, the tube diameter and tube pitch have been decreased, and the tube density has been increased. For example, a heat exchanging section is formed of extremely thin tubes of which outer diameter is about 0.5 mm.[0003]FIG. 27 is a front view of a conventional heat exchanger disclosed in Japanese Patent Unexamined Publication No. 2001-116481. In the conventional heat exchanger, inlet tank 31 and outlet tank 32 are faced to each other at a predetermined interval as shown in FIG. 27. Core section 34 is formed between inlet tank 31 and outlet tank 32, and, in core section 34, a plurality of tube...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F28F3/00B21D53/02F28F3/04F28F3/12F28D1/053F28F3/08
CPCY10T29/4935F28F3/086
Inventor TANIGUCHI, MITSUNORIKIDO, OSAOMAMEMOTO, TOSHIAKI
Owner PANASONIC CORP
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