Method for producing a plate heat exchanger with multiple heat exchanger blocks connected by solder-coated supports

Patent metadata

Field	Value
Publication number	US-2016209129-A1
Application number	US-201414914662-A
Country	US
Kind code	A1
Filing date	Aug 14, 2014
Priority date	Aug 29, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

A method for producing a plate heat exchanger with at least two heat exchanger blocks which are produced separately from one another in a soldering furnace. Each heat exchanger block has multiple separating sheets arranged parallel to one another and which form a plurality of heat exchanger passages for fluids involved in a heat exchange process. At least one support provided with solder is heated in order to melt the solder, the support is arranged between opposing outer surfaces of the heat exchanger blocks to be connected which are placed one on top of the other or adjacently, the support(s) thus being fixed between the opposing outer surfaces. After the solder is hardened, a bonded and heat-conductive connection is produced between the heat exchanger blocks. Sheets or wire arrangement can be used as the supports.

First claim

1 . A method for producing a plate heat exchanger with at least two heat exchanger blocks, which are produced separately from one another in a brazing furnace, each heat exchanger block having multiple parting sheets, which are arranged parallel to one another and form a multiplicity of heat exchange passages for fluids involved in the heat exchange, characterized in that after separately producing the heat exchanger blocks in the brazing furnace, the following steps are taken: at least one support provided with solder is heated to melt the solder, the at least one support is arranged between opposing outer surfaces of heat exchanger blocks to be connected, and the heat exchanger blocks to be connected are placed one on top of the other or one against the other in such a way that the at least one support is secured between the opposing outer surfaces.

2 . The method as claimed in claim 1 , characterized in that the support is produced with metal.

3 . The method as claimed in claim 1 , characterized in that the support is a metal sheet.

4 . The method as claimed in claim 1 , characterized in that the support or the supports is or are constructed from an arrangement of metal wires, in particular form a wire grid.

5 . The method as claimed in claim 1 , characterized in that the support solder, with which the support is provided, has a lower melting point than the component solder, by which components within the heat exchanger blocks are connected.

6 . The method as claimed in claim 1 , characterized in that the support has an area extent that corresponds at least to the outer surfaces to be connected of the heat exchanger blocks.

7 . The method as claimed in claim 1 , characterized in that the support has a surface area that corresponds to a partial area of the outer surfaces of the heat exchanger blocks, multiple supports, in particular in the form of strips, being arranged next to one another.

8 . The method as claimed in claim 1 , characterized in that the support is provided with solder on one side or both sides.

9 . The method as claimed in claim 1 , characterized in that a solder layer is loosely placed or adhesively attached onto the support or the support is coated with the solder, in particular by cladding, dipping or spraying.

10 . The method as claimed in claim 1 , characterized in that the heat exchanger blocks are placed one on top of the other or one against the other as soon as the support has reached the melting temperature of the solder.

11 . The method as claimed in claim 1 , characterized in that the support, is heated by applying an electrical voltage or by an induction means, in particular an induction coil.

12 . The method as claimed in claim 1 , characterized in that at least one first support, which has multiple first solder-coated wire rods arranged parallel to one another in a first plane, and at least one second support, which likewise has multiple second solder-coated wire rods arranged parallel to one another in a second plane, are used, the first support and the second support being arranged in relation to one another in such a way that the first plane and the second plane are arranged parallel to one another and the first wire rods and the second wire rods are arranged at an angle to one another, the first wire rods and second wire rods in particular forming with one another an included angle of approximately 90°.

13 . A plate heat exchanger with at least two heat exchanger blocks, each heat exchanger block having multiple parting sheets, which are arranged parallel to one another and form a multiplicity of heat exchange passages for fluids involved in the heat exchange, and the heat exchanger blocks being outwardly delimited by cover sheets and having at least one common header for distributing a heat-exchanging fluid to the two heat exchanger blocks or for discharging a heat-exchanging fluid from the two heat exchanger blocks, characterized in that the heat exchanger blocks are respectively connected at opposing cover sheets by at least one flat support, which is connected to the cover sheets of the heat exchanger blocks by solder.

14 . The plate heat exchanger as claimed in claim 13 , characterized in that the cover sheets have a greater material thickness than the parting sheets located within the heat exchanger blocks.

15 . The plate heat exchanger as claimed in claim 13 , characterized in that the support or supports cover(s) the cover sheets of the heat exchanger blocks more or less completely.

16 . The plate heat exchanger as claimed in claim 13 , characterized in that multiple, in particular two to four, supports arranged parallel to one another, in particular in the form of planar metal sheets, are located between the cover sheets.

17 . The plate heat exchanger according claim 13 , characterized in that means for dividing the heat exchange passages into a multiplicity of channels, in particular corrugated sheets, are arranged in the heat exchange passages of the heat exchanger blocks.

Assignees

• Linde Ag

Inventors

• Dietrich Jörg
• Hölzl Reinhold

Classifications

• F28F3/08

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

• F25J2290/50

  Arrangement of multiple equipments fulfilling the same process step in parallel · CPC title

• F28D9/0068

  with means for changing flow direction of one heat exchange medium, e.g. using deflecting zones · CPC title

• Y10T29/49393

  with metallurgical bonding · CPC title

• B23K1/0012 Primary

  Brazing of heat exchangers · CPC title