Heat exchanger

Patent metadata

Field	Value
Publication number	US-2016282066-A1
Application number	US-201414778066-A
Country	US
Kind code	A1
Filing date	Mar 3, 2014
Priority date	Mar 18, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

Two or more cores ( 2 a, 2 b ) in each of which two more types of passage layers through which two or more fluids flow are layered alternately are welded together. The entire bottom portions of the cores ( 2 a, 2 b ) are covered with a lower header tank ( 3 ), thereby making the fluids flow into the cores ( 2 a, 2 b ). A dummy layer ( 14 ) through which none of the fluids flow is provided beside a weld side face of each core ( 2 a, 2 b ). A weld spacer ( 18 ) is welded to the entire peripheral edge of a side plate ( 16 ) of the dummy layer ( 14 ). A through-hole ( 16 a ) for draining water in the dummy layer ( 14 ) is made near the lower end of the side plate of the dummy layer ( 14 ). Further, a liquid drain hole ( 20 ) through which water is drained is made at a lower corner of the weld spacer ( 18 ).

First claim

1 . A heat exchanger including two or more cores welded together and each including two or more types of passage layers which are layered alternately and through which two or more fluids at different temperatures flow, the heat exchanger comprising:
a lower header tank which entirely covers bottom portions of the cores and makes the fluids flow into the cores; a dummy layer which is provided at least beside a weld side face of each core, and through which none of the fluids flow; a weld spacer which is fixed to an entire peripheral edge of a side plate of the dummy layer; a through-hole which is made near a lower end of the side plate of the dummy layer, and through which liquid in the dummy layer is drained into a space defined by the weld spacer; and a liquid drain hole which is made at a lower corner of the weld spacer, and through which the liquid in the space is drained.

2 . The heat exchanger of claim 1 , wherein
the weld spacer is comprised of a plurality of bar-like members, and the liquid drain hole is implemented as a clearance between two of the bar-like members.

3 . The heat exchanger of claim 2 , wherein
the liquid drain hole is made between obliquely-cut tips of two of the bar-like members, and extends toward a lower corner of the core.

4 . The heat exchanger of claim 1 , wherein
a cylindrical member is fixed to an outer peripheral edge of the liquid drain hole, and an inside of the cylindrical member communicates with the liquid drain hole.

5 . The heat exchanger of claim 1 , wherein
the cylindrical member is capable of receiving a plugging member which is detachable and capable of plugging the liquid drain hole.

Assignees

• Sumitomo Precision Prod Co

Inventors

• Shigemori Hideki
• Kitagishi Koichi
• Hotta Shozo

Classifications

• F28F2265/22

  for draining · CPC title

• F28D9/0037

  the conduits for the other heat-exchange medium also being formed by paired plates touching each other (F28D9/0043 takes precedence) · CPC title

• F28F2265/14

  for preventing damage by freezing, e.g. for accommodating volume expansion · CPC title

• F28F9/185

  with additional preformed parts · CPC title

• F28F2265/06

  by using means for draining heat exchange media from heat exchangers · CPC title