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WO-2026094666-A1 - HEAT EXCHANGER

WO2026094666A1WO 2026094666 A1WO2026094666 A1WO 2026094666A1WO-2026094666-A1

Abstract

This heat exchanger is provided with a tank part (120) formed by brazing flat surfaces of a plurality of flat plate-shaped members (123, 126) arranged in a stacked manner. The flat plate-shaped members include a first flat plate-shaped member (123) and a second flat plate-shaped member (126). The first flat plate-shaped member (123) has a wall surface (123B) extending in the stacking direction of the plurality of flat plate-shaped members and in the longitudinal direction of the first flat plate-shaped member (123). The wall surface (123B) is formed with a bent section (20) bent by a load in a predetermined direction including a component in a direction perpendicular to the wall surface (123B). The bent section (20) is in contact with the second flat plate-shaped member (126), thereby fixing the first flat plate-shaped member (123) and the second flat plate-shaped member (126).

Inventors

  • MATSUDA TAKUYA
  • MATSUDA YUTA
  • GOTO NAOTO
  • YOSHII SHINSAKU

Assignees

  • 株式会社デンソー

Dates

Publication Date
20260507
Application Date
20251017
Priority Date
20241031

Claims (13)

  1. The device includes a tank section (120) formed by brazing together the flat surfaces of multiple stacked flat plate-shaped members (123, 126), The aforementioned flat plate-shaped member includes a first flat plate-shaped member (123) and a second flat plate-shaped member (126). The first flat plate-shaped member has a wall surface (123B) that extends in the stacking direction of the plurality of flat plate-shaped members and in the longitudinal direction of the first flat plate-shaped member. The wall surface has a bent portion (20) formed by a load in a predetermined direction that includes a component perpendicular to the wall surface. A heat exchanger in which the bent portion abuts against the second flat plate-shaped member, thereby fixing the first flat plate-shaped member and the second flat plate-shaped member together.
  2. The heat exchanger according to claim 1, wherein the bend line (FL) when the bent portion is bent is non-parallel to the flat surface of the second flat plate-shaped member.
  3. The heat exchanger according to claim 1 or 2, wherein the surface pressure between the flat surface of the first flat plate member and the flat surface of the second flat plate member increases as the amount of bending of the bent portion increases.
  4. The heat exchanger according to claim 1 or 2, wherein the portion (20A) of the bent portion on the second flat plate-shaped member side, when viewed from a direction perpendicular to the wall surface before bending, forms a line that is at least partially non-parallel to the longitudinal direction of the first flat plate-shaped member.
  5. The heat exchanger according to claim 1 or 2, wherein the portion (20A) of the bent portion on the side of the second flat plate-shaped member, when viewed from a direction perpendicular to the wall surface before bending, draws a line inclined with respect to the longitudinal direction of the first flat plate-shaped member.
  6. The heat exchanger according to claim 1 or 2, wherein the bent portion has two parts (201, 202) when viewed from a direction perpendicular to the wall surface before being bent.
  7. The second flat plate-shaped member has a contact portion (30) that the bent portion abuts against, The heat exchanger according to claim 1 or 2, wherein the contact portion is formed on the flat surface of the second flat plate-shaped member.
  8. The second flat plate-shaped member has a contact portion (30) that the bent portion abuts against, The heat exchanger according to claim 1 or 2, wherein the contact portion has a surface inclined with respect to the flat surface of the second flat plate-shaped member.
  9. The portion (20A) of the bent portion on the side of the second flat plate-shaped member, in a cross-section perpendicular to the longitudinal direction before bending, draws a line non-parallel to the direction perpendicular to the wall surface, according to claim 1 or 2.
  10. The portion (20A) of the bent portion on the side of the second flat plate-shaped member, in a cross-section perpendicular to the longitudinal direction before bending, draws a line inclined with respect to the direction perpendicular to the wall surface, as described in claim 9.
  11. The heat exchanger according to claim 1 or 2, wherein a chamfered portion (20B) is formed on the cross section perpendicular to the longitudinal direction of the portion (20A) on the second flat plate-shaped member side of the bent portion.
  12. The second flat plate-shaped member has a contact portion (30) that the bent portion abuts against, The heat exchanger according to claim 1 or 2, wherein the contact surfaces of the bent portion and the contact portion are both bare surfaces on which no brazing material is placed.
  13. The heat exchanger according to claim 12, wherein the contact portion is formed at the end of the second flat plate-shaped member on the wall side.

Description

heat exchanger Cross-reference of related applications This application is based on Japanese Patent Application No. 2024-192366, filed on October 31, 2024, and its contents are incorporated herein by reference. This disclosure relates to a heat exchanger. Conventionally, heat exchangers comprising a tank section formed by joining multiple components are known. For example, the tank section of the heat exchanger described in Patent Document 1 is formed by brazing multiple components together while their bare surfaces at both longitudinal ends are temporarily fixed. A bare surface is a surface where brazing material has not been applied. Here, a heat exchanger is known that includes a tank section formed by overlapping the flat surfaces of multiple flat plate-shaped members and brazing them together. In this type of heat exchanger, even if the tank section is temporarily fixed at two points at both ends in the longitudinal direction, as in Patent Document 1, if loosening occurs in the longitudinal center, the flat surfaces of the plate-shaped members may separate in the stacking direction, potentially leading to brazing defects. In view of the above points, this disclosure aims to provide a heat exchanger capable of suppressing brazing defects. To achieve the above objective, a heat exchanger according to one aspect of the present disclosure comprises a tank section formed by brazing together the flat surfaces of a plurality of stacked flat plate members, The flat plate-shaped member includes a first flat plate-shaped member and a second flat plate-shaped member. The first flat plate-shaped member has a wall surface that extends in the stacking direction of the plurality of flat plate-shaped members and in the longitudinal direction of the first flat plate-shaped member. The wall surface has a bent portion formed by a load in a predetermined direction that includes a component perpendicular to the wall surface. The bent portion abuts against the second flat plate-shaped member, fixing the first flat plate-shaped member and the second flat plate-shaped member together. According to this method, the first and second flat plate members are fixed together by being pressed down by the bent portion, thus preventing them from separating in the lamination direction. This makes it possible to suppress brazing defects. This is a perspective view of the heat exchanger in the first embodiment before the bent portion is bent.This is a perspective view showing the tank portion before the bent portion is bent in the first embodiment.This is a view from arrow III in Figure 2.This is a view from arrow IV in Figure 2.This is a perspective view showing the tank section in the first embodiment.This is an enlarged front view showing a modified example of the header plate in the first embodiment before the bent portion is bent.This is an enlarged front view showing a modified example of the header plate in the first embodiment before the bent portion is bent.This is an enlarged front view showing a modified example of the header plate in the first embodiment before the bent portion is bent.This is an enlarged front view showing a modified example of the header plate in the first embodiment before the bent portion is bent.This is an enlarged front view showing a modified example of the header plate in the first embodiment before the bent portion is bent.This is an enlarged front view showing the header plate in the second embodiment before the bent portion is folded.This is a view from arrow XII in Figure 11.This is an enlarged front view showing the tank section before the bent portion is folded in the third embodiment.This is an enlarged front view showing the header plate before the bent portion is folded in the fourth embodiment.This is a view from arrow XV in Figure 14.This is a partially enlarged view showing a modified example of the header plate before the bent portion is bent, according to the fourth embodiment.This is a side view showing the tank header in the fifth embodiment.This is a side view showing a modified example of the tank header in the fifth embodiment.This is an enlarged front view showing the tank section before the bent portion is folded in the sixth embodiment. The following describes several embodiments for implementing this disclosure, with reference to the drawings. In each embodiment, parts corresponding to those described in a previous embodiment may be denoted by the same reference numerals, and redundant explanations may be omitted. If only a part of the configuration is described in each embodiment, other embodiments described previously may be applied to the remaining parts of the configuration. It is possible to combine parts that are explicitly shown as being combinable in each embodiment. Furthermore, if there are no particular problems with the combination, it is also possible to partially combine embodiments even if it is not explicitly shown as being combinable. Unless otherwise specified,