Plate fin heat exchanger

Patent metadata

Field	Value
Publication number	US-8985192-B2
Application number	US-74886010-A
Country	US
Kind code	B2
Filing date	Mar 29, 2010
Priority date	Apr 20, 2009
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

A plate fin heat exchanger of the present invention includes a heat exchange part including a heat exchange part main body including layers of plural flow passages, and heat transfer members each of which is disposed within each flow passage of the heat exchange part main body to transfer the heat of fluid flowing in each of the flow passages to each partition walls opposed across the flow passage; and sensing parts connected to both the outsides of the heat exchange part respectively. Each of the sensing parts includes plural sealed spaces, and a sensor wall disposed to separate the outermost sealed space from the sealed space on the inner side thereof. The plate fin heat exchanger further includes a detection means for detecting damage of the sensor wall of the sensing part. According to such a structure, external leak of the fluid performing the heat exchange can be prevented while suppressing deterioration of performance or increase in size or weight.

First claim

What is claimed is:

1. A plate fin heat exchanger configured to perform heat exchange between plural fluids, comprising:
a heat exchange part main body including alternating layers of flow passages for carrying each of the plural fluids, the heat exchange main body includes partition walls each of which is arranged between each of two adjacent said flow passages respectively, the heat exchange part main body includes at least a first outer side and a second outer side, the second outer side provided on an opposite side of the main body from the first outer side, the flow passages are alternately arranged in an arrangement direction from the first outer side to the second outer side such that an axis of the main body part would extend through each alternating layer of the flow passages;
a plurality of side bars positioned between each opposed partition wall to thereby connect the opposed partition walls to each other and seal a space between the opposed partition walls;
heat transfer members each of which is disposed within each of said flow passages of said heat exchange part main body respectively, each of said heat transfer members connecting said partition walls opposed across each of said flow passages to transfer the heat of the fluid flowing in each of said flow passages to said opposed partition walls;
sensing parts including a first sensing part connected to the first outer side and a second sensing part connected to the second outer side of said heat exchange part main body in series along the arrangement direction of said flow passages, each of said sensing parts includes a plurality of sealed spaces including an outermost sealed space and an innermost sealed space provided immediately adjacent the outermost sealed space, the sealed spaces each being formed by a plurality of the opposed partition walls, one of the plurality of side bars, and one of the heat transfer members so as to seal an entire circumference of the sealed spaces, the sealed spaces being arranged in series along the arrangement direction of said flow passages, and a sensor wall disposed to separate the outermost sealed space from the innermost sealed space on the inner side of said outermost sealed space; and
a detection means connected to each sensing part for detecting damage of said sensor wall,
wherein the first sensing part is provided adjacent the first outer side, and the second sensing part is provided adjacent the second outer side.

2. The plate fin heat exchanger according to claim 1 , wherein said detection means includes a pressurizing means for pressurizing the inside of one of said two sealed spaces with said sensor wall therebetween, and a pressure measuring means for measuring pressure in the other sealed space.

3. The plate fin heat exchanger according to claim 1 , wherein said heat exchange part main body includes an outside partition wall which separates an outermost flow passage of said flow passages in the arrangement direction of said flow passages from the outside, and
each of said sensing parts is connected to said heat exchange part main body so that an innermost sealed space of said sealed spaces in the arrangement direction of said flow passages is adjacent to said outermost flow passage of said heat exchange part main body with said outside partition wall therebetween, and has strength enough to endure a situation such that the pressure within each of said sealed spaces is equal to the pressure within each of said flow passages with the fluid flowing therein of said heat exchange part main body.

4. The plate fin heat exchanger according to claim 1 , further comprising:
a fluid detection means for detecting the presence of the fluid in said innermost sealed space of said sealed spaces in the arrangement direction of said flow passages.

5. The plate fin heat exchanger according to claim 1 , wherein each of said sensing parts has two of said sealed spaces.

6. The plate fin heat exchanger according to claim 2 , wherein the pressurizing means pressurizes the inside of each of the sealed spaces by feeding nitrogen gas into the sealed spaces.

7. The plate fin heat exchanger according to claim 1 , wherein a detection means is provided for each of the sensing parts.

Assignees

• Mitsuhashi Kenichiro
• Terada Susumu
• Noishiki Koji
• Kobe Steel Ltd

Inventors

• Mitsuhashi Kenichiro
• Terada Susumu
• Noishiki Koji

Classifications

• F28D9/0062 Primary

  the conduits for one heat-exchange medium being formed by spaced plates with inserted elements (F28D9/0012, F28D9/0025, F28D9/0081, F28D9/04 take precedence) · CPC title

• F28F3/025

  the means being corrugated, plate-like elements · CPC title

• F28F27/00

  Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus (control arrangements in general G05) · CPC title

• F28D9/0093

  Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids · CPC title

• F25J2280/02

  Control in general, load changes, different modes ("runs"), measurements · CPC title