Stacked heat exchanger

Patent metadata

Field	Value
Publication number	US-2021239403-A1
Application number	US-201917054304-A
Country	US
Kind code	A1
Filing date	May 21, 2019
Priority date	Jun 6, 2018
Publication date	Aug 5, 2021
Grant date	—

Abstract

This stacked heat exchanger is provided with: a high temperature layer that comprises a plurality of channels into which a high temperature-side fluid is introduced; and a low temperature layer that is superposed on the high temperature layer and comprises a plurality of channels into which a low temperature-side fluid is introduced, said low temperature-side fluid being at a temperature that is lower than the temperature of the high temperature-side fluid. Each one of the plurality of channels of the low temperature layer has: an upstream-side part in which at least some of the low temperature-side fluid evaporates by being heated by the high temperature-side fluid that flows within the high temperature layer; and a downstream-side part in which the low temperature-side fluid that has evaporated in the upstream-side part is heated by the high temperature-side fluid that flows within the high temperature layer. The ratio of the areas of the plurality of upstream-side parts in a predetermined area of the low temperature layer is lower than the ratio of the areas of the plurality of downstream-side parts in the predetermined area of the low temperature layer.

First claim

1 . A stacked heat exchanger, comprising:
a high temperature layer that has a plurality of channels into which a high temperature-side fluid is introduced; and a low temperature layer that has a plurality of channels into which a low temperature-side fluid is introduced, the low temperature layer being stacked on the high temperature layer, and the low temperature-side fluid having a temperature lower than the high temperature-side fluid, wherein each of the channels of the low temperature layer has an upstream-side part in which at least a part of the low temperature-side fluid evaporates by being heated by the high temperature-side fluid that flows within the high temperature layer, and a downstream-side part in which the low temperature-side fluid that has evaporated in the upstream-side part is heated by the high temperature-side fluid that flows within the high temperature layer, and a ratio of an area of the plurality of upstream-side parts to a predetermined area in the low temperature layer is lower than a ratio of an area of the plurality of downstream-side parts to the predetermined area in the low temperature layer.

2 . The stacked heat exchanger according to claim 1 ,
wherein due to a difference in at least one of channel shape, channel pitch, channel width, and channel depth, the ratio of the area of the plurality of upstream-side parts to the predetermined area in the low temperature layer is lower than the ratio of the area of the plurality of downstream-side parts to the predetermined area in the low temperature layer.

3 . The stacked heat exchanger according to claim 1 , further comprising
a second high temperature layer that has a plurality of channels into which the high temperature-side fluid is introduced, the second high temperature layer being stacked on an opposite side of the high temperature layer from the low temperature layer.

4 . The stacked heat exchanger according to claim 1 ,
wherein the low temperature layer further includes a communication channel that is communicated with the upstream-side part of each of the channels and is communicated with the downstream-side part of each of the channels.

5 . The stacked heat exchanger according to claim 1 ,
wherein each of the upstream-side parts has the same length.

6 . The stacked heat exchanger according to claim 1 ,
wherein each of the upstream-side parts has a shape extending linearly, and each of the downstream-side parts has a shape extending in a wave shape or a zigzag shape.

7 . The stacked heat exchanger according to claim 1 ,
wherein each of the upstream-side parts has a shape extending linearly, and each of the downstream-side parts is different from the upstream-side part in at least one of channel pitch, channel width and channel depth, and has a shape extending linearly.

8 . The stacked heat exchanger according to claim 2 ,
wherein the low temperature layer further includes a communication channel that is communicated with the upstream-side part of each of the channels and is communicated with the downstream-side part of each of the channels.

9 . The stacked heat exchanger according to claim 3 ,
wherein the low temperature layer further includes a communication channel that is communicated with the upstream-side part of each of the channels and is communicated with the downstream-side part of each of the channels.

Assignees

• Kobe Steel Ltd

Inventors

• Noishiki Koji

Classifications

• F28F2275/061

  by diffusion bonding · CPC title

• F28F2260/02

  having microchannels · CPC title

• F28F2210/08

  Assemblies of conduits having different features · CPC title

• F28F3/08

  Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning · 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