Heat exchanger and heat pump device

Patent metadata

Field	Value
Publication number	US-11549733-B2
Application number	US-202117562302-A
Country	US
Kind code	B2
Filing date	Dec 27, 2021
Priority date	Jun 28, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A heat exchanger includes heat transfer tubes and a header that forms a refrigerant flow path. The header includes: a first member that includes a first plate-shaped portion; a second member that includes a second plate-shaped portion; a third member that includes a third plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in a first direction that is a direction in which the first plate-shaped portion and the second plate-shaped portion are arranged; a fourth member that includes a fourth plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in the first direction and a second opening that constitutes a part of the refrigerant flow path, where a second is along a longitudinal direction of the second opening; and a fifth member.

First claim

The invention claimed is:

1. A heat exchanger comprising:
heat transfer tubes; and
a header that forms a refrigerant flow path,
wherein the header includes:
a first member that includes a first plate-shaped portion;
a second member that includes a second plate-shaped portion;
a third member that includes a third plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in a first direction that is a direction in which the first plate-shaped portion and the second plate-shaped portion are arranged;
a fourth member that includes:
a fourth plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in the first direction; and
a second opening that constitutes a part of the refrigerant flow path, where a second direction is along a longitudinal direction of the second opening; and

a fifth member that includes a fifth plate-shaped portion positioned between the third plate-shaped portion and the fourth plate-shaped portion in the first direction,

wherein the heat transfer tubes are connected to the first plate-shaped portion and are disposed along the second direction,
wherein the third plate-shaped portion has a first opening that constitutes a part of the refrigerant flow path, where the first opening:
extends in the second direction, and
includes a first region, a second region, and a third region that are arranged in this order in the second direction,

wherein a length of the second region in a third direction, the third direction being perpendicular to both of the first direction and the second direction, is:
shorter than a length of the first region in the third direction; and
shorter than a length of the third region in the third direction, and

wherein the fifth plate-shaped portion has:
a third opening that communicates with the third region and the second opening, and
a fourth opening that, at a position differing from a position of the third opening in the second direction, communicates with the third region and the second opening.

2. The heat exchanger according to claim 1 , wherein the length of the second region in the third direction is larger than or equal to a length of the third plate-shaped portion in the first direction.

3. The heat exchanger according to claim 1 , wherein Wf/Tf is less than or equal to 2.5, where Wf is the length of the third region in the third direction and Tf is a length of the third region in the first direction.

4. The heat exchanger according to claim 1 , wherein, in the first direction, the first plate-shaped portion, the fourth plate-shaped portion, the fifth plate-shaped portion, the third plate-shaped portion, and the second plate-shaped portion are arranged in this order.

5. The heat exchanger according to claim 1 , wherein the heat transfer tubes include a first heat transfer tube that guides a refrigerant to the third region and a second heat transfer tube that allows the refrigerant that has passed through the third region to flow.

6. The heat exchanger according to claim 1 , further comprising:
a refrigerant pipe connected to the header,
wherein the header forms the refrigerant flow path between the refrigerant pipe and the heat transfer tubes.

7. The heat exchanger according to claim 1 , wherein lengths of the first plate-shaped portion, the second plate-shaped portion, and the third plate-shaped portion in the first direction are each 3 mm or less.

8. The heat exchanger according to claim 1 , further comprising:
a liquid refrigerant pipe connected to the header,
wherein the header is connected to the first region and includes a flow path that extends in the header from the liquid refrigerant pipe, and
wherein, when viewed from the first direction, a connection portion between the first region and the flow path, the second region, and the third region are arranged in the second direction.

9. The heat exchanger according to claim 1 , wherein the second direction is a vertical direction of the heat exchanger.

10. The heat exchanger according to claim 9 ,
wherein the first region, the second region, and the third region are arranged in this order from a bottom of the heat exchanger, and
wherein a length of the third region in the vertical direction is longer than a length of the first region in the vertical direction.

11. A heat pump device comprising:
the heat exchanger according to claim 1 .

12. The heat pump device according to claim 11 , further comprising:
a fan that produces an air flow that passes through the heat exchanger,
wherein the header includes a plate-shaped portion that
is positioned between an end portion of each of the heat transfer tubes and the third plate-shaped portion, and
has openings, and

wherein the openings are disposed closer to a windward end portion of the plate-shaped portion than a leeward end portion of the plate-shaped portion in an air flow direction.

13. The heat exchanger according to claim 1 , wherein, in the first direction, the first plate-shaped portion, the third plate-shaped portion, the fifth plate-shaped portion, the fourth plate-shaped portion, and the second plate-shaped portion are arranged in this order.

14. The heat exchanger according to claim 13 , further comprising:
a liquid refrigerant pipe connected to the second plate-shaped portion,
wherein the fourth plate-shaped portion further has a sixth opening,
wherein the fifth plate-shaped portion further has a seventh opening, and
wherein a connection portion between the second plate-shaped portion and the liquid refrigerant pipe communicates with the first region via the sixth opening and the seventh opening.

15. The heat exchanger according to claim 13 , further comprising:
a sixth member that includes a sixth plate-shaped portion positioned between the first plate-shaped portion and the third plate-shaped portion in the first direction,
wherein the sixth plate-shaped portion has fifth openings that are arranged in the second direction to correspond with the heat transfer tubes.

16. The heat exchanger according to claim 15 ,
wherein, when viewed in the first direction, the first region and the fifth openings do not overlap each other, and
wherein the sixth member includes a wall portion that covers the first region in an entirety thereof from a side of connection positions of the heat transfer tubes.

17. The heat exchanger according to claim 15 , wherein, when viewed from the first direction, the fifth openings are positioned within a range of a region obtained by extending in a virtual manner the second region in the second direction.

18. A heat exchanger comprising:
heat transfer tubes; and
a header that forms a refrigerant flow path,
wherein the header includes:
a first member that includes a first plate-shaped portion;
a second member that includes a second plate-shaped portion; and
a third member that includes a third plate-shaped portion positioned between the first plate-shaped portion and the second plate-shaped portion in a first direction that is a direction in which the first plate-shaped portion and the second plate-shaped portion are arranged,

wherein the heat transfer tubes are connected to the first plate-shaped portion,
wherein the third plate-shaped portion has a first opening that constitutes a part of the refrigerant flow path, where the first opening:
extends in a second direction that is a direction in which the heat transfer tubes are arranged, and
includes a first region, a second region, and a third region th

Assignees

• Daikin Ind Ltd

Inventors

• Hirokawa Tomoki
• Andou Tooru
• Matsumoto Yoshiyuki
• Kusaka hideyuki
• Fujino Hirokazu
• Yamada Kouju

Classifications

• F28D1/05383

  with multiple rows of conduits or with multi-channel conduits (F28D1/05391 takes precedence) · CPC title

• F28D2021/0068

  for refrigerant cycles · CPC title

• F25B39/00 Primary

  Evaporators; Condensers · CPC title

• F28F9/0221

  Header boxes or end plates formed by stacked elements · CPC title

• F28F1/32

  the means having portions engaging further tubular elements · CPC title