Heat exchanger

Patent metadata

Field	Value
Publication number	US-2018023898-A1
Application number	US-201615550992-A
Country	US
Kind code	A1
Filing date	Feb 29, 2016
Priority date	Mar 2, 2015
Publication date	Jan 25, 2018
Grant date	—

Abstract

A heat exchanger includes a duct, a stacked core, and a coupling plate. The duct includes a first plate that is disposed to face at least one of end faces of the stacked core in a core width direction, and a second plate that is disposed to face at least one of the end faces of the stacked core in a tube stacking direction. The second plate includes a second-plate end plate portion disposed to face the end face of the stacked core in the core width direction and brazed to a wall surface of the first plate, a second-plate center plate portion that is disposed to face the end face of the stacked core in the tube stacking direction, and a flange portion that extends in the tube stacking direction and is brazed to a bottom wall surface of a groove portion of the coupling plate.

First claim

What is claimed is:

1 . A heat exchanger, comprising:
a duct including at least two plates combined into a cylindrical shape, a first fluid flow channel provided inside the duct through which a first fluid passes, an inflow port for the first fluid on one end of the first fluid flow channel, and an outflow port for the first fluid on another end of the first fluid flow channel; a stacked core that is accommodated in the duct and includes a plurality of tubes having flat shapes and being stacked, a second fluid flow channel provided inside each of the plurality of tubes through which a second fluid passes, and outer fins arranged between adjacent tubes of the plurality of tubes, the tubes and the outer fins being brazed to each other; and a coupling plate that is brazed to the duct and has a groove portion defining a peripheral edge of the inflow port or the outflow port, wherein a direction intersecting with a tube stacking direction and a first fluid flow direction is defined as a core width direction, the duct includes a first plate disposed to face at least one of end faces of the stacked core in the core width direction, and a second plate disposed to face at least one of end faces of the stacked core in the tube stacking direction, and the second plate includes a second-plate end plate portion disposed to face the end face of the stacked core in the core width direction and brazed to a wall surface of the first plate, a second-plate center plate portion disposed to face the end face of the stacked core in the tube stacking direction, and a flange portion that extends in the tube stacking direction and is brazed to a bottom wall surface of the groove of the coupling plate.

2 . The heat exchanger according to claim 1 , wherein the flange portion has a surface extending outward of the duct from an edge portion of the second plate which is located on an end of the second plate in the flow direction of the first fluid.

3 . The heat exchanger according to claim 1 , wherein
the duct is formed into the cylindrical shape by combination of one first plate and one second plate, the first plate includes first-plate end plate portions disposed to face the respective end faces of the stacked core in the core width direction, and a first-plate center plate portion that is disposed to face one end face of the stacked core in the tube stacking direction and couples the first-plate end plate portions, and the second plate is disposed to face another end face of the stacked core in the tube stacking direction.

4 . The heat exchanger according to claim 1 , wherein
the duct is formed into the cylindrical shape by combination of two first plates and two second plates, one first plate of the two first plates is disposed to face one end face of the stacked core in the core width direction, and another first plate is disposed to face another end face of the stacked core in the core width direction, and one second plate of the two second plates is disposed to face one end face of the stacked core in the tube stacking direction, and another second plate is disposed to face another end face of the stacked core in the tube stacking direction.

5 . The heat exchanger according to claim 1 , wherein the first plate includes a sealing protrusion with which a meeting gap generated in a meeting portion between the first plate, the second plate and the coupling plate is filled.

6 . The heat exchanger according to claim 5 , wherein
a surface of the sealing protrusion facing the meeting gap is flat, and surfaces of the second plate and the coupling plate facing the meeting gap are rounded.

7 . The heat exchanger according to claim 6 , wherein
the first plate includes first-plate end plate portions that are disposed to face the respective end faces of the stacked core in the core width direction, and an angle of a surface of the sealing protrusion facing the meeting gap with respect to the first-plate end plate portion is 45 degrees or more.

8 . The heat exchanger according to claim 5 , wherein
a surface of the sealing protrusion facing the meeting gap is rounded, and surfaces of the second plate and the coupling plate facing the meeting gap are flat.

9 . The heat exchanger according to claim 5 , wherein
a surface of the sealing protrusion facing the second plate and the meeting gap is rounded, and a surface of the sealing protrusion facing the coupling plate and the meeting gap is flat, and surfaces of the second plate and the coupling plate facing the meeting gap are rounded.

10 . The heat exchanger according to claim 5 , wherein
a surface of the sealing protrusion facing the second plate and the meeting gap is flat, and a surface of the sealing protrusion facing the coupling plate and the meeting gap is rounded, and surfaces of the second plate and the coupling plate facing the meeting gap are rounded.

11 . The heat exchanger according to any one of claim 1 , further comprising a sealing member inserted into a gap generated in a meeting portion between the first plate, the second plate and the coupling plate such that the gap is filled with the sealing member.

12 . The heat exchanger according to claim 1 , wherein the first plate includes a positioning portion that contacts the bottom wall surface to set relative positions of the first plate and the coupling plate in the first fluid flow direction.

13 . The heat exchanger according to claim 1 , wherein at least one of the inflow port of the first fluid and the outflow port of the first fluid, in which the coupling plate is disposed, is substantially rectangular.

14 . The heat exchanger according to claim 1 , wherein the coupling plate includes: an inner wall surface that is erected from an inner peripheral side edge of the bottom wall surface, and a locking portion that protrudes from the inner wall surface toward the first fluid flow channel and is engageable with the end face of the first plate in the first fluid flow direction.

15 . The heat exchanger according to claim 14 , wherein the locking portion is provided over an entire circumference of the inner wall surface.

16 . The heat exchanger according to claim 14 , wherein the locking portion connects portions of the inner wall surface which face each other.

17 . A heat exchanger, comprising:
a duct including at least two plates combined into a cylindrical shape, a first fluid flow channel provided inside the duct through which a first fluid passes, an inflow port for the first fluid on one end of the first fluid flow channel, and an outflow port for the first fluid on another end of the first fluid flow channel; a stacked core that is accommodated in the duct and includes a plurality of tubes having flat shapes and being stacked, a second fluid flow channel provided inside each of the plurality of tubes through which a second fluid passes, and outer fins arranged between adjacent tubes of the plurality of tubes, the tubes and the outer fins being brazed to each other; and a coupling plate that is blazed to the duct and has a groove portion defining a peripheral edge of the inflow port or the outflow port, wherein the duct includes a first plate having a wall surface extending in a tube stacking direction, and a second plate disposed to face at least one of end faces of the stacked core in the tube stacking direction, and the second plate includes a second-plate end plate portion that extends in the tube stacking direction and is brazed to a wall surface of the first plate, a second-plate center plate portion disposed to face the end face

Assignees

• Denso Corp

Inventors

• Saitou Masafumi
• Yamanaka Akira
• Harada Masaki
• Yamada Kenji
• Suzuki Kazutaka
• Asano Taichi
• Terachi Shota

Classifications

• F28F9/001

  Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core · CPC title

• F28F9/0226

  with resilient gaskets · CPC title

• F28D9/0056 Primary

  with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates · CPC title

• F28F2275/122

  by crimping, caulking or clinching · CPC title

• F28F2275/04

  by brazing · CPC title