Laminated header, heat exchanger, and air-conditioning apparatus

Patent metadata

Field	Value
Publication number	US-2016178292-A1
Application number	US-201314910308-A
Country	US
Kind code	A1
Filing date	Sep 26, 2013
Priority date	Sep 26, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

A laminated header according to the present invention includes: a first plate-like body having a plurality of first outlet flow passages formed therein; and a second plate-like body laminated on the first plate-like body, the second plate-like body having a distribution flow passage formed therein, the distribution flow passage being configured to distribute refrigerant, which passes through a first inlet flow passage to flow into the second plate-like body, to the plurality of first outlet flow passages to cause the refrigerant to flow out from the second plate-like body. A branching flow passage of the distribution flow passage includes: a branching portion; an inflow passage extending toward the branching portion; and a plurality of outflow passages extending from the branching portion in directions different from each other. Curvature radii of bending portions of the plurality of outflow passages are different from each other.

First claim

1 . A laminated header, comprising:
a first plate-like body having a plurality of first outlet flow passages formed therein; and a second plate-like body attached to the first plate-like body, the second plate-like body having a first inlet flow passage,
the second plate-like body having at least a part of a distribution flow passage formed therein, the distribution flow passage being configured to distribute refrigerant, which passes through the first inlet flow passage to flow into the second plate-like body, to the plurality of first outlet flow passages to cause the refrigerant to flow out from the second plate-like body,
wherein the distribution flow passage comprises at least one branching flow passage,
wherein the at least one branching flow passage comprises
a branching portion,
an inflow passage extending toward the branching portion, and
a plurality of outflow passages extending from the branching portion in directions different from each other,

wherein each of at least two outflow passages of the plurality of outflow passages has one bending portion or a plurality of bending portions formed therein, and
wherein a curvature radius of the one bending portion formed in one outflow passage of the at least two outflow passages or a curvature radius of a bending portion having a largest bending angle among the plurality of bending portions formed in the one outflow passage of the at least two outflow passages is different from a curvature radius of the one bending portion formed in at least one outflow passage different from the one outflow passage of the at least two outflow passages or a curvature radius of a bending portion having a largest bending angle among the plurality of bending portions formed in the at least one outflow passage different from the one outflow passage of the at least two outflow passages.

2 . The laminated header of claim 1 , wherein the curvature radius comprises a curvature radius of an outer wall surface of each of the plurality of outflow passages.

3 . The laminated header of claim 1 , wherein the curvature radius comprises a curvature radius of an inner wall surface of the each of the plurality of outflow passages.

4 . The laminated header of claim 1 , wherein an end portion of the each of the at least two outflow passages on a side communicated to the branching portion extends in a direction perpendicular to a gravity direction.

5 . The laminated header of claim 1 , wherein the at least two outflow passages comprise
a first outflow passage communicating the branching portion and an end portion, which is higher than the branching portion in height in the gravity direction, and a second outflow passage communicating the branching portion and an end portion, which is lower than the branching portion in height in the gravity direction.

6 . The laminated header of claim 1 ,
wherein the second plate-like body comprises at least one first plate-like member having a groove formed therein, and wherein the at least one branching flow passage is formed by closing a region in the groove other than a region where the refrigerant is caused to flow in and a region where the refrigerant is caused to flow out.

7 . The laminated header of claim 6 ,
wherein the at least one first plate-like member is laminated through intermediation of a second plate-like member having a brazing material applied to one or both surfaces of the second plate-like member, and wherein the second plate-like member has a through hole formed therein so as to communicate with any one of each of end portions of the groove and a part of the groove between the end portions.

8 . The laminated header of claim 1 ,
wherein the first plate-like body has a plurality of second inlet flow passages and a plurality of turn-back flow passages formed therein, each of the plurality of turn-back flow passages being configured to turn back the refrigerant, which flows into the first plate-like body, to thereby cause the refrigerant to flow out from the first plate-like body, and wherein the second plate-like body has at least a part of a joining flow passage formed therein, the joining flow passage being configured to join flows of the refrigerant, which pass through the plurality of second inlet flow passages to flow into the second plate-like body, to thereby cause the refrigerant to flow into a second outlet flow passage.

9 . A heat exchanger, comprising:
the laminated header of claim 1 ; and a plurality of heat transfer tubes each connected to each of the plurality of first outlet flow passages.

10 . An air-conditioning apparatus, comprising the heat exchanger of claim 9 ,
wherein the distribution flow passage is configured to cause the refrigerant to flow out from the distribution flow passage toward the plurality of first outlet flow passages when the heat exchanger serves as an evaporator.

Assignees

• Mitsubishi Electric Corp

Inventors

• Matsui Shigeyoshi
• Higashiiue Shinya
• Okazaki Takashi
• Ishibashi Akira
• Ito Daisuke
• Mochizuki Atsushi

Classifications

• F28F3/086

  having one or more openings therein forming tubular heat-exchange passages · CPC title

• F28F9/0265 Primary

  by using guiding means or impingement means inside the header box · CPC title

• F28F9/0275

  with multiple branch pipes · CPC title

• F28F9/0221 Primary

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

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title