Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of manufacturing header tank for heat exchanger and heat exchanger having the header tank

Inactive Publication Date: 2008-05-29
DENSO CORP
View PDF1 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]The present invention is made in view of the foregoing matter, and it is an object of the present invention to provide a method of manufacturing a header tank for a heat exchanger, capable of improving assemblability, and a heat exchanger having the header tank manufactured by the method. It is another object of the present invention to provide a method of manufacturing a header tank for a heat exchanger, having sufficient durability, and a heat exchanger having the header tank manufactured by the method.
[0011]Namely, the first engagement portion is formed in the core plate before the first wall portion is moved toward the tank body. Therefore, it is less likely that the first engagement portion will interfere with a component part such as a pipe member of the tank body when the first wall portion is moved toward the tank body. Accordingly, assemblability of the header tank improves.
[0013]As another example, the first engagement portion is formed on the core plate, and a portion of the first wall portion is bent outwardly along a bending axis with the first engagement portion to be in a pre-bent condition. After the tank body is placed on the base portion, the portion of the first wall portion is moved toward the tank body about the bending axis such that the first engagement portion engages with the tank body. In this case, the bending axis is included within the first wall portion, and the portion of the first engagement portion is moved toward the tank body to engage the first engagement portion with the tank body about the bending axis. Thus, it is not necessary to form a weak portion, at which a strength is reduced for easing bending, on a corner portion between the first wall portion and the first engagement portion. Because the strength of the corner portion is not reduced, the core plate maintains durability even if the corner portion receives stress from the tank body due to an increase in an internal pressure of the header tank. Accordingly, the header tank maintains sufficient durability.

Problems solved by technology

In such a heat exchanger, because pipe members, such as inlet pipe and outlet pipe, for introducing and discharging an internal fluid, are coupled to the tank body, the engagement portions will interfere in the pipe members during the bending of the side wall portions.
In such a case, it will be difficult to properly bend the side wall portions toward the tank body.
Also, if the tank body is provided with members such as fixing parts for fixing a fan shroud, the engagement portions will interfere in the members.
Therefore, it will be difficult to properly bend the side wall portions toward the tank body.
Further, the durability of the heat exchanger will reduce.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of manufacturing header tank for heat exchanger and heat exchanger having the header tank
  • Method of manufacturing header tank for heat exchanger and heat exchanger having the header tank
  • Method of manufacturing header tank for heat exchanger and heat exchanger having the header tank

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0046]FIG. 1 shows a heat exchanger 1 of the first embodiment when viewed along a flow direction of air. The heat exchanger 1 is exemplarily employed to a radiator that is generally mounted in an engine compartment of a vehicle and performs heat exchange between an engine coolant and the air, the flow of which is for example generated by a blower, thereby to cool the engine coolant.

[0047]The radiator 1 generally includes tubes 2, fins 3, side plates 4a, 4b and header tanks 5a, 5b. The tubes 2 have generally flat tubular shapes, and form passages therein for allowing the engine coolant, which flows out from the engine, to pass through. The tubes 2 are, for example, made of light metals having high heat conductivity. In the present embodiment, the tubes 2 are exemplarily made of aluminum alloy. Also, the tubes 2 are formed of clad members, at least one of surfaces of which is coated with a filler material, such as a brazing material.

[0048]The fins 3 are joined to outer surfaces of the...

second embodiment

[0101]In the radiator 1 of the second embodiment, the core plate 50a has a shape slightly different from the core plate 50a of the radiator 1 of the first embodiment.

[0102]In a case that the tank body 50b and the core plate 50a are made of different materials, such as aluminum alloy and resin, the tank body 50b has a coefficient of linear expansion greater than that of the core plate 50a. Under a high temperature condition, the end wall portions 52c, 52d will be deformed by being pressed by the projected end 600 in the tank longitudinal direction D2 due to thermal expansion of the tank body 50b.

[0103]In the second embodiment, therefore, the core plate 50a includes support wall portions 610 for supporting the end wall portions 52c, 52d, as shown in FIGS. 12, 13A and 13B. The support wall portions 610 project from the lengthwise edges of the bottom wall portion 51, at positions adjacent to the longitudinal ends of the core plate 50a. In addition, the support wall portions 610 connect...

third embodiment

[0106]In the core plate 50a of the radiator 1 of the first embodiment, each of the side engagement portions 53a, 53b forms a generally right angle with the corresponding side wall portion 52a, 52b, as shown in FIG. 2. However, the angle between the side engagement portion 53a, 53b and the side wall portion 52a, 52b can be modified.

[0107]In the radiator 1 of the third embodiment, each side engagement portion 53a, 53b is engaged with the projected end 600 such that an angle +1 between the side engagement portion 53a, 53b and the side wall portion 52a, 52b is smaller than 90 degrees, as shown in FIG. 15. Therefore, an engagement force, that is, a force for joining the tank body 50b with the core plate 50a improves. Further, the sealing effect of the sealing member 54 improves.

[0108]The above engagement structure may be also employed to the end engagement portions 53c, 53d. That is, the end engagement portions 53c, 53d may be engaged with the projected end 600 such that the angle betwee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Angleaaaaaaaaaa
Angleaaaaaaaaaa
Widthaaaaaaaaaa
Login to View More

Abstract

A method of manufacturing a header tank for a heat exchanger includes forming a first engagement portion in a core plate, placing a tank body relative to a base portion of the core plate, and moving a first wall portion toward the tank body such that the first engagement portion is engaged with the tank body. In the forming, a portion of the core plate is bent, the portion extending from the first wall portion. In the placing, the tank body is placed such that an opening of the tank body is covered by the base portion such that a tank inner space is defined. The first engagement portion is engaged with the tank body by moving the first wall portion toward the tank body.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is based on Japanese Patent Applications No. 2006-321389 filed on Nov. 29, 2006 and No. 2007-104600 filed on Apr. 12, 2007, the disclosures of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a method of manufacturing a header tank for a heat exchanger and a heat exchanger having the header tank.BACKGROUND OF THE INVENTION[0003]In general, a heat exchanger such as a radiator has tubes and a header tank. The header tank is, for example, constructed of a tank body having a semi-tubular shape and a core plate to which the tubes are coupled. The core plate is, for example, fixed to the tank body through engagement portions. A heat exchanger having such a structure is described in Japanese Unexamined Patent Publications No. 2004-66283 and No. 2002-286396 (U.S. Pat. No. 6,892,804), for example.[0004]In the heat exchanger disclosed in the Publication No. 2004-66283, a core pl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F28F9/02B21D53/02
CPCB21D53/02Y10T29/4935F28F2275/122F28F9/0226
Inventor HAKAMATA, OSAMUOZAKI, TATSUONINAGAWA, TOSHIHIDE
Owner DENSO CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com