Plate heat exchanger

Patent metadata

Field	Value
Publication number	US-9927186-B2
Application number	US-201214344901-A
Country	US
Kind code	B2
Filing date	Sep 13, 2012
Priority date	Sep 14, 2011
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

To provide a plate heat exchanger free from degradation of gaskets which form a flow path through which a high-temperature fluid flows. In the plate heat exchanger, a plurality of heat transfer plates 20 each provided with passage holes 21, 22, 23 , and 24 in corners are stacked; a flow-path forming gasket 31 is interposed between peripheries of each adjacent ones of the heat transfer plates 20 ; communicating-path forming gaskets 32 are installed, surrounding the passage holes 21 in each adjacent ones of the heat transfer plates 20 alternately; and thereby a first flow path 1 adapted to pass a high-temperature fluid H, a second flow path adapted to pass a low-temperature fluid C, and communicating paths 3 adapted to cause the high-temperature fluid H and the low-temperature fluid C, respectively, to flow in and out of the first flow path 1 and the second flow path 2 are formed alternately on opposite sides of each of the heat transfer plates 20 . The flow-path forming gasket 31 is made up of an inner gasket member 31 a and an outer gasket member 31 b arranged in two parallel lines.

First claim

What is claimed is:

1. A plate heat exchanger comprising:
a plurality of heat transfer plates that have a rectangular shape and are stacked to each other in an upright posture, each heat transfer plate provided with a plurality of passage holes, each of the passage holes being arranged in each corner of the heat transfer plate;
flow-path forming gaskets, each flow-path forming gasket interposed between each adjacent ones of the heat transfer plates in periphery thereof; and
communicating-path forming gaskets, surrounding the plurality of passage holes in each adjacent ones of the heat transfer plates alternately, thereby a first flow path adapted to pass a high-temperature fluid, and a second flow path adapted to pass a low-temperature fluid are formed alternately on opposite sides of each of the heat transfer plates,
wherein a first communicating path adapted to cause the high-temperature fluid to flow in and out of the first flow path through a pair of upper and lower ones of the plurality of passage holes, and a second communicating path adapted to cause the low-temperature fluid to flow in and out of the second flow path through a pair of upper and lower ones of the plurality of passage holes, which are different from the first communicating path, are formed alternately in the stacked heat transfer plates,
wherein at least one of the flow-path forming gaskets comprises an inner gasket member and an outer gasket member arranged in two parallel lines,
wherein a space defined between the inner gasket member and the outer gasket member contains none of the plurality of passage holes,
wherein each of the plurality of heat transfer plates are double-grooved to correspond to the inner gasket member and the outer gasket member,
wherein the pair of upper and lower passage holes for causing the high-temperature fluid to flow in and out of the first flow path are surrounded by the flow-path forming gasket,
wherein the pair of upper and lower passage holes for causing the low-temperature fluid to flow in and out of the second flow path are surrounded by the flow-path forming gasket,
wherein a distance between the inner gasket member and the outer gasket member becomes gradually larger from a laterally outer side and a lower side of the corresponding passage hole surrounded by the flow-path forming gasket and formed on a side close to the corresponding lower corner of the heat transfer plate toward the corresponding lower corner of the heat transfer plate, and
wherein a drain hole is formed in a space between the inner gasket member and the outer gasket member to be located at a point on a laterally outer side of the heat transfer plate and a diagonally downward side relative to an axial center of the passage hole formed on a side close to the corresponding lower corner of the heat transfer plate.

2. The plate heat exchanger according to claim 1 , wherein the heat transfer plates have a gas supply hole formed between the inner gasket member and the outer gasket member between the flow-path forming gaskets; and an enclosed space surrounded by the inner gasket member, the outer gasket member, and the heat transfer plates is filled with an inert gas.

3. The plate heat exchanger according to claim 1 , further comprising a plurality of cassette plates stacked to each other, each cassette plate being made up of the two heat transfer plates of the stacked plurality of heat transfer plates which are permanently joined on peripheries,
wherein a flow-path forming gasket is interposed between peripheries of each adjacent ones of the cassette plates,
wherein the communicating-path forming gaskets are installed to surround the passage holes in adjacent ones of the cassette plates alternately so that the first flow path and the second flow path are formed alternately in the inside of each cassette plate and between the adjacent cassette plates.

Assignees

• Hiwatashi Isamu
• Iwaki Mana
• Kusunoki Kenji
• Matsumura Seiichi
• Ishihama Kiyoshi
• Takahisa Funabiki
• Hisaka Works Ltd
• Hitachi Ge Nuclear Energy Ltd

Inventors

• Hiwatashi Isamu
• Iwaki Mana
• Kusunoki Kenji
• Matsumura Seiichi
• Ishihama Kiyoshi
• Takahisa Funabiki

Classifications

• F28F2265/22

  for draining · CPC title

• F28D9/005

  the plates having openings therein for both heat-exchange media · CPC title

• F28F3/083

  capable of being taken apart · CPC title

• F28F2230/00

  Sealing means · CPC title

• F28F9/0251

  Massive connectors, e.g. blocks; Plate-like connectors · CPC title