# US 2018/0320995 A1 · Heat exchanger

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- Number: US 2018/0320995 A1
- Document ID: US20180320995A1
- Status: Published application
- Kind: A1
- Application number: 15/768,449
- Filed: 2016-09-06
- Published: 2018-11-08
- Earliest claimed: 2015-10-15
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Takahiro UNO; Takuya MITSUHASHI
- Web page: https://patentgrep.com/patent/US20180320995A1

## CPC

- F28F 9/0226: {with resilient gaskets}
- F28D 1/05366: {Assemblies of conduits connected to common headers, e.g. core type radiators}
- F28F 9/18: by welding
- F28F 9/182: {the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments}
- F28F 2225/02: for casings
- F28F 2225/08: for header boxes
- F28F 2265/26: for allowing differential expansion between elements
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)

## Abstract

A heat exchanger includes tubes and a header tank. The header tank includes a core plate and a tank body. The core plate includes a tube connection surface and a receiving portion that houses an end portion of the tank body. The receiving portion includes a bottom wall and an inner wall that connects the bottom wall to the tube connection surface. The tube connection surface and the inner wall are connected to a rib. The rib is located between adjacent two tubes and inclined with respect to a longitudinal direction of the tubes. The rib includes one end connected to the tube connection surface and an other end connected to the inner wall. The tubes includes lateral ends in the width direction, and a clearance, which has a specified dimension, is defined between the inner wall and the lateral ends in the width direction.

## Claims

### Claim 1

A heat exchanger comprising:
a plurality of tubes that are stacked and have a flat shape; and
a header tank that is positioned on a side of the plurality of tubes in a longitudinal direction of the plurality of tubes, the header tank being in communication with the plurality of tubes, wherein
the header tank includes
a core plate that is coupled with longitudinal ends of the plurality of tubes and
a tank body that is fixed to the core plate, the core plate includes
a tube connection surface that includes a plurality of tube insertion holes corresponding to the plurality of tubes, the plurality of tubes being inserted into the plurality of tube insertion holes and brazed to the tube connection surface and
a receiving portion that surrounds the tube connection surface and houses an end portion of the tank body which is located adjacent to the core plate,
the receiving portion includes
a bottom wall that faces the tank body across a sealing member and
an inner wall that connects the bottom wall to the tube connection surface,
the tube connection surface and the inner wall are connected to a rib, which is located between adjacent two tubes of the plurality of tubes and inclined with respect to the longitudinal direction,
the rib includes one end and an other end facing each other in a width direction of the plurality of tubes, the one end being connected to the tube connection surface, the other end being connected to the inner wall, and
the plurality of tubes include lateral ends in the width direction, and a clearance, which has a specified dimension, is defined between the inner wall and the lateral ends in the width direction.

### Claim 2 (depends on 1)

The heat exchanger according to claim 1, wherein
the other end of the rib is connected to a portion of the inner wall which is located between one end and an other end of the inner wall in the longitudinal direction.

### Claim 3

(canceled)

### Claim 4 (depends on 1)

The heat exchanger according to claim 1, wherein
the specified dimension is larger than 0.43 millimeters and smaller than 1.30 millimeters.

### Claim 5 (depends on 1)

The heat exchanger according to claim 1, wherein
the core plate includes a connection area where the longitudinal ends of the plurality of tubes are connected to the core plate, and a thickness of the core plate in the connection area is smaller than that of the core plate in other portion.

### Claim 6 (depends on 1)

The heat exchanger according to claim 1, wherein the rib includes at least one step portion in the width direction.

### Claim 7 (depends on 1)

The heat exchanger according to claim 1, wherein an inner surface of the tank body is located between lateral ends of the plurality of tubes and center portions of the plurality of tubes in the width direction.