Stacked heat exchanger

Patent metadata

Field	Value
Publication number	US-2016010929-A1
Application number	US-201414770717-A
Country	US
Kind code	A1
Filing date	Feb 21, 2014
Priority date	Feb 27, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

A stacked heat exchanger including a core portion having a plurality of plates stacked on each other to define a flat refrigerant passage and a flat heat medium passage. A first connection member that provides an inlet and an outlet for allowing the refrigerant to flow into the refrigerant passage. A second connection member that provides an inlet and an outlet for allowing the heat medium to flow into the heat medium passage, in which the inlet and the outlet are configured in a state where the heat medium flowing into the heat medium passage flows in an opposite direction to that of the refrigerant flowing in the refrigerant passage. The core portion includes an offset fin disposed in at least the refrigerant passage.

First claim

What is claimed is:

1 . A stacked heat exchanger including a core portion having a plurality of plates stacked on each other in a stacking direction to define a plurality of flat refrigerant passages for refrigerant which flows in a refrigeration cycle, and a plurality of flat heat medium passages for heat medium which performs a heat exchange with the refrigerant, the stacked heat exchanger comprising:
a first connection member that provides an inlet and an outlet for allowing the refrigerant to flow into the refrigerant passage; and a second connection member that provides an inlet and an outlet for allowing the heat medium to flow into the heat medium passage, in which the inlet and the outlet are configured in a state where the heat medium flowing into the heat medium passage flows in an opposite direction to that of the refrigerant flowing in the refrigerant passage, wherein the core portion includes an offset fin disposed in at least the refrigerant passage, the core portion includes
a refrigerant inlet through passage extending in the stacking direction and providing an inlet by communicating with one end of the refrigerant passages;
a refrigerant outlet through passage extending in the stacking direction and providing an outlet by communicating with the other end of the refrigerant passages;
a heat medium inlet through passage extending in the stacking direction and providing an inlet by communicating with one end of the heat medium passages; and
a heat medium outlet through passage extending in the stacking direction and providing an outlet by communicating with the other end of the heat medium passages,
the refrigerant inlet through passage and the refrigerant outlet through passage are arranged on one diagonal of the core portion, the heat medium inlet through passage and the heat medium outlet through passage are arranged on another diagonal of the core portion, the plurality of plates include a partition plate that divides the refrigerant passage and/or the heat medium passage in the core portion into a plurality of groups, and that makes the groups to communicate with each other in series, and the core portion forms a U-turn shaped flow path along a horizontal direction orthogonal to the stacking direction.

2 . The stacked heat exchanger according to claim 1 , wherein
the core portion includes: a plurality of core plates defining the refrigerant passage and the heat medium passage; and an end plate disposed on both ends of a stacked member of the core plates, and the end plate is thicker than the core plate.

3 . (canceled)

4 . The stacked heat exchanger according to claim 1 , wherein
the partition plate has a closing portion that closes a through passage extending from at least one of the first connection member and the second connection member.

5 . The stacked heat exchanger according to claim 2 , wherein
the core plates other than the partition plate each have an opening that provides a through passage extending from at least one of the first connection member and the second connection member.

6 . (canceled)

7 . The stacked heat exchanger according to claim 2 , wherein
the core plates respectively have outer cylindrical portions located in an outer periphery of the core portion and the outer cylindrical portions are stacked on each other.

8 . The stacked heat exchanger according to claim 7 , wherein
the outer cylindrical portions are at least doubly stacked on each other in the outer periphery of the core portion.

9 . The stacked heat exchanger according to claim 8 , wherein
the outer cylindrical portions are partially triply stacked on each other in the outer periphery of the core portion.

10 . The stacked heat exchanger according to claim 1 , wherein
the core portion includes: a previous stage that provides a heat exchange between the refrigerant and a first heat medium when using the heat medium as the first heat medium; and a subsequent stage that provides a heat exchange between the refrigerant that performs the heat exchange in the previous stage and a second heat medium having a temperature different from that of the first heat medium.

11 . The stacked heat exchanger according to claim 10 , wherein
the refrigerant supplied to the previous stage and the subsequent stage is a refrigerant on a high pressure side of the refrigeration cycle, and the second heat medium is a heat medium that performs the heat exchange with the refrigerant on a low pressure side of the refrigeration cycle.

12 . The stacked heat exchanger according to claim 10 , wherein
the refrigerant supplied to the previous stage and the subsequent stage is a refrigerant on a low pressure side of the refrigeration cycle, and the second heat medium is a heat medium that performs the heat exchange with the refrigerant on a high pressure side of the refrigeration cycle.

13 . The stacked heat exchanger according to claim 10 , wherein
the refrigerant supplied to the previous stage and the subsequent stage is a refrigerant on a low pressure side of the refrigeration cycle, and the second heat medium is a refrigerant on a high pressure side of the refrigeration cycle.

14 . The stacked heat exchanger according to claim 10 , wherein
the refrigerant supplied to the previous stage and the subsequent stage is a refrigerant on a high pressure side of the refrigeration cycle, and the second heat medium is a refrigerant on a low pressure side of the refrigeration cycle.

15 . The stacked heat exchanger according to claim 1 , wherein
at least one of the first connection member and the second connection member includes: a first joint that is disposed around a passage for allowing the refrigerant or the heat medium to flow therein, and joined to the core portion; and a second joint that is disposed at a position closer to a center than the first joint and joined to the core portion, on an end surface of the core portion in the stacking direction.

16 . The stacked heat exchanger according to claim 1 , wherein
the refrigerant on the high pressure side of the refrigeration cycle and the refrigerant on the low pressure side of the refrigeration cycle are selectively supplied to the refrigerant passage.

17 . The stacked heat exchanger according to claim 1 , wherein
the core portion includes:
a high pressure side heat exchange portion to which the refrigerant on the high pressure side of the refrigeration cycle is supplied; and
a low pressure side heat exchange portion to which the refrigerant on the low pressure side of the refrigeration cycle is supplied.

18 . The stacked heat exchanger according to claim 17 , wherein
a plate disposed on an end of the high pressure side heat exchange portion and a plate disposed on an end of the low pressure side heat exchange portion are disposed back to back, and joined to each other.

19 . A stacked heat exchanger, comprising:
a heat exchanging unit that performs a heat exchange between a refrigerant of a refrigeration cycle and a heat medium, wherein the heat exchanging unit is formed by stacking a plurality of plate members on each other, and joining the plate members to each other, a plurality of refrigerant flow channels in which the refrigerant flows, and a plurality of heat medium flow channels in which the heat medium flows are defined between the respective plate members, the plurality of refrigerant flow channels and the plurality of heat medium flow channels are arranged side by side in a stacking direction of the pluralit

Assignees

• Denso Corp

Inventors

• Takahashi Eizo
• Tamada Isao

Classifications

• F28F2250/10

  Particular pattern of flow of the heat exchange media · CPC title

• F28F3/06 Primary

  the means being attachable to the element · CPC title

• F28F9/02

  Header boxes; End plates · CPC title

• F28F9/0251

  Massive connectors, e.g. blocks; Plate-like connectors · CPC title

• F28D9/005

  the plates having openings therein for both heat-exchange media · CPC title