Cold storage heat exchanger

Patent metadata

Field	Value
Publication number	US-10696128-B2
Application number	US-201615765101-A
Country	US
Kind code	B2
Filing date	Sep 23, 2016
Priority date	Oct 1, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A cold storage heat exchanger includes: a plurality of refrigerant tubes disposed at intervals, each of the refrigerant tubes including a refrigerant passage that allows a refrigerant to flow therethrough; a cold storage material adjacent to the refrigerant tubes; and a heat transfer suppressor that suppresses heat transfer from the refrigerant tubes to the cold storage material in an overheated area of the refrigerant formed in the refrigerant passage.

First claim

What is claimed is:

1. A cold storage heat exchanger comprising:
a plurality of refrigerant tubes disposed at intervals, each of the refrigerant tubes including a refrigerant passage that allows a refrigerant to flow therethrough;
a cold storage material adjacent to the refrigerant tubes;
a cold storage material container adjacent to the refrigerant tubes, the cold storage material container storing the cold storage material; and
an inner fin disposed inside the cold storage material container, wherein
a shape of the cold storage material container is formed such that a joining ratio between the inner fin and the cold storage material container or a joining ratio between the cold storage material container and the refrigerant tube is different between a part corresponding to an overheated area and a part corresponding to an area other than the overheated area, and
the inner fin contacts an inner surface of the cold storage material container forming inner fin-container contact surface areas, an inner fin-container contact surface area in the overheated area is less than an inner fin-container contact surface area in the area other than the overheated area.

2. The cold storage heat exchanger according to claim 1 , wherein:
the cold storage material container is disposed between two of the refrigerant tubes with a longitudinal direction of the cold storage material container aligned with an extending direction of the refrigerant tubes and joined to the two refrigerant tubes; and
an air passage formed in a space between another one of the refrigerant tubes and each of the two refrigerant tubes joined to the cold storage material container at a side opposite to the cold storage material container for heat exchange between air flowing through the space and the refrigerant.

3. The cold storage heat exchanger according to claim 2 , wherein
heat transfer from the refrigerant tubes to the cold storage material in the overheated area formed by evaporation of the refrigerant near an outlet of the refrigerant passage is suppressed.

4. The cold storage heat exchanger according to claim 3 , wherein
the inner fin that extends in a longitudinal direction that is the extending direction of the refrigerant tubes inside the cold storage material container,
the inner fin is configured in such a manner that, in the cold storage material container joined to the refrigerant tube having the overheated area,
a heat transfer amount from the refrigerant tube to the cold storage material through the inner fin is relatively small in a part that is in contact with the overheated area of the refrigerant tube and
a heat transfer amount from the refrigerant tube to the cold storage material through the inner fin is relatively large in a part that is in contact with an area other than the overheated area of the refrigerant tube.

5. The cold storage heat exchanger according to claim 4 , wherein
in the cold storage material container joined to the refrigerant tube having the overheated area,
the inner fin has a relatively low joining ratio with an inner wall of the cold storage material container in a part that is in contact with the overheated area of the refrigerant tube and
the inner fin has a relatively high joining ratio with the inner wall of the cold storage material container in a part that is in contact with an area other than the overheated area of the refrigerant tube.

6. The cold storage heat exchanger according to claim 4 , wherein
in the cold storage material container joined to the refrigerant tube having the overheated area,
the inner fin is not joined to an inner wall of the cold storage material container in a part that is in contact with the overheated area of the refrigerant tube and
the inner fin is joined to the inner wall of the cold storage material container in a part that is in contact with an area other than the overheated area of the refrigerant tube.

7. The cold storage heat exchanger according to claim 6 , wherein:
the plurality of refrigerant tubes include at least two refrigerant tubes disposed in an airflow direction of the air in the air passage;
the cold storage material container is joined to the at least two refrigerant tubes disposed in the airflow direction;
the inner fin overlaps the at least two refrigerant tubes when viewed in an array direction of the refrigerant tubes and the cold storage material container; and
in the cold storage material container joined to the at least two refrigerant tubes including a refrigerant tube having the overheated area,
the inner fin is not joined to the inner wall of the cold storage material container in an area that includes a part that is in contact with the overheated area of the refrigerant tube and overlaps the part in contact with the overheated area of the refrigerant tube when viewed in the airflow direction and
the inner fin is joined to the inner wall of the cold storage material container in the other area.

8. The cold storage heat exchanger according to claim 6 , wherein:
the plurality of refrigerant tubes include at least two refrigerant tubes disposed in an airflow direction of the air in the air passage;
the cold storage material container is joined to the at least two refrigerant tubes disposed in the airflow direction;
the inner fin overlaps the at least two refrigerant tubes when viewed in an array direction of the refrigerant tubes and the cold storage material container; and
in the cold storage material container joined to the at least two refrigerant tubes including a refrigerant tube having the overheated area,
the inner fin is joined to the inner wall of the cold storage material container over the entire area in the longitudinal direction that is the extending direction of the refrigerant tubes in an area overlapping a refrigerant tube having no overheated area, and
the inner fin is not joined to the inner wall of the cold storage material container in a part that is in contact with the overheated area of the refrigerant tube and joined to the inner wall of the cold storage material container in the other part in an area overlapping the refrigerant tube having the overheated area.

9. The cold storage heat exchanger according to claim 3 , wherein:
the cold storage material container joined to the refrigerant tube having the overheated area is configured in such a manner that
a heat transfer amount from the refrigerant tube to the cold storage material through the cold storage material container is relatively small in a part that is in contact with the overheated area of the refrigerant tube and
a heat transfer amount from the refrigerant tube to the cold storage material through the cold storage material container is relatively large in a part that is in contact with an area other than the overheated area of the refrigerant tube.

10. The cold storage heat exchanger according to claim 9 , wherein
the cold storage material container joined to the refrigerant tube having the overheated area
has a relatively low joining ratio with the refrigerant tube in a part that is in contact with the overheated area of the refrigerant tube and
has a relatively high joining ratio with the refrigerant tube in a part that is in contact with an area other than the overheated area of the refrigerant tube.

11. The cold storage heat exchanger according to claim 9 , wherein
the cold storage material container joined to the refrigerant tube having the overheated area is separated from the refrigerant tube without being joined to the refrigerant tube in a part that is in contact with the overheated area of the refrigerant tube and joined to the refrigerant tube in a part that is in contact with an area othe

Assignees

• Denso Corp

Inventors

• Abei Jun
• Nagasawa Toshiya
• Torigoe Eiichi
• Ishizaka Naohisa
• Kawachi Norihide
• Kitou Yuusuke
• Nishimura Ken
• Nagaya Masakazu

Classifications

• B60H1/00335 Primary

  of the gas-air type (B60H1/18 takes precedence) · CPC title

• Y02E60/14

  Thermal energy storage · CPC title

• B60H1/3227 Primary

  characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator (condensed liquid drainage means B60H1/3233) · CPC title

• B60H1/005 Primary

  Regenerative cooling means, e.g. cold accumulators · CPC title

• Y02E60/145

  Cross-Sectional Technologies · mapped topic