Bulkhead heat exchanger

Patent metadata

Field	Value
Publication number	US-2021003351-A1
Application number	US-201916976223-A
Country	US
Kind code	A1
Filing date	Jan 24, 2019
Priority date	Feb 28, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

A bulkhead heat exchanger includes a first bulkhead, a second bulkhead, and a plurality of flow path walls which divide a space formed between the first bulkhead and the second bulkhead into a plurality of first flow paths, wherein the first bulkhead and the second bulkhead separate the plurality of first flow paths from a plurality of second flow paths through which a second fluid different from a first fluid flowing through the plurality of first flow paths flows, the plurality of flow path walls have the plurality of wall surfaces, and the plurality of wall surfaces conform to sine curves different from each other, respectively.

First claim

1 . A bulkhead heat exchanger comprising:
a first bulkhead; a second bulkhead; and a plurality of flow path walls which divide a space formed between the first bulkhead and the second bulkhead into a plurality of first flow paths, wherein the first bulkhead and the second bulkhead separate the plurality of first flow paths from second flow paths through which a second fluid different from a first fluid flowing through the plurality of first flow paths flows, the plurality of flow path walls have a plurality of wall surfaces, and the plurality of wall surfaces conform to sine curves different from each other, respectively.

2 . The bulkhead heat exchanger according to claim 1 ,
wherein each of the plurality of flow path walls includes a first wall surface, and a second wall surface which is formed on a side opposite to the first wall surface, the sine curves include a first sine curve and a second sine curve, the first wall surface conforms to the first sine curve and the second wall surface conforms to the second sine curve, a period and an amplitude of the first sine curve are equal to a period and an amplitude of the second sine curve, and the first sine curve and the second sine curve are located at positions translated by a predetermined offset value in respective amplitude directions.

3 . The bulkhead heat exchanger according to claim 1 ,
wherein each of the plurality of flow path walls includes a first wall surface, and a second wall surface which is formed on a side opposite to the first wall surface, the sine curves include a first sine curve and a second sine curve, the first wall surface conforms to the first sine curve and the second wall surface conforms to the second sine curve, a period of the first sine curve is equal to a period of the second sine curve, an amplitude of the first sine curve is smaller than an amplitude of the second sine curve, and the first sine curve and the second sine curve intersect each other at respective inflection points.

4 . The bulkhead heat exchanger according to claim 1 ,
wherein each of the plurality of flow path walls is divided into a plurality of flow path wall elements by forming notches at each period of the sine curves, the notches overlap inflection points of the sine curves, and the flow path wall elements overlap maximum points or minimum points of the sine curves.

5 . The bulkhead heat exchanger according to claim 4 ,
wherein the flow path wall element is formed so that a width thereof is gently reduced toward an end adjacent to the notches.

6 . The bulkhead heat exchanger according to claim 4 ;
wherein the flow path wall element is further divided by forming an in-element notch, and the in-element notch overlaps another inflection point of the sine curves which is different from the inflection points where the notches overlap.

7 . The bulkhead heat exchanger according to claim 6 ,
wherein the flow path wall element includes an intermediate flow path wall element disposed in the in-element notch.

8 . The bulkhead heat exchanger according to claim 1 , further comprising:
a sidewall which forms a sidewall surface on an end of the space, wherein the sidewall surface conforms to another sine curve having the same period as that of the sine curves.

9 . The bulkhead heat exchanger according to claim 1 ,
wherein a value obtained by dividing a minimum value of an interval between the plurality of flow path walls by an interval between the first bulkhead and the second bulkhead is larger than 2.5 and smaller than 6.

Assignees

• Fujitsu General Ltd

Inventors

• O Gaiken
• Takahashi Toshihiko
• Koizumi Akira

Classifications

• 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

• F28F2250/02

  Streamline-shaped elements · CPC title

• F28F13/08

  by varying the cross-section of the flow channels · CPC title

• F28F7/02

  Blocks traversed by passages for heat-exchange media {(F28D7/0008 takes precedence)} · CPC title

• F28F3/048

  in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels · CPC title