US20070137844A1 - Plate heat exchanger - Google Patents

Plate heat exchanger Download PDF

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Publication number
US20070137844A1
US20070137844A1 US11/607,094 US60709406A US2007137844A1 US 20070137844 A1 US20070137844 A1 US 20070137844A1 US 60709406 A US60709406 A US 60709406A US 2007137844 A1 US2007137844 A1 US 2007137844A1
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US
United States
Prior art keywords
heat exchanger
header
cylinder jacket
shaped
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/607,094
Inventor
Herbert Aigner
Gabriele Engl
Thomas Hecht
Stefan Moller
Wolfgang Sussmann
Alfred Wanner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP05026404.3 priority Critical
Priority to EP20050026404 priority patent/EP1793192A1/en
Application filed by Linde GmbH filed Critical Linde GmbH
Assigned to LINDE AKTIENGESELLSCHAFT reassignment LINDE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANNER, ALFRED, MOLLER, STEFAN, HECHT, THOMAS, ENGL, GABRIELE, SUSSMANN, WOLFGANG, AIGER, HERBERT
Publication of US20070137844A1 publication Critical patent/US20070137844A1/en
Assigned to LINDE AKTIENGESELLSCHAFT reassignment LINDE AKTIENGESELLSCHAFT CHANGE OF ADDRESS Assignors: LINDE AKTIENGESELLSCHAFT
Abandoned legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/0243Header boxes having a circular cross-section

Abstract

In a plate heat exchanger having a heat exchanger block (1) with a number of heat exchange passages and a header (2) attached to the heat exchanger block, the header providing a flow connection between a portion of the heat exchange passages and a fluid connection (3), the header is defined by a cylinder jacket segment-shaped wall (7) and by a flat surface (12), which runs parallel to the axis of the cylinder (13) on a side (5) of the heat exchanger block. The length of the header extends over at least one portion of a side (5) of the heat exchanger block. At least one wall (7) of the header is connected to the side (5) of the heat exchanger block. The header is designed so that the axis (13) of the cylinder runs inside the header spaced at a distance (11) from the flat surface (12).

Description

  • The invention relates to a plate heat exchanger comprising a heat exchanger block having a plurality of heat exchange passages, and a header attached to the heat exchanger block providing a flow connection between a portion of the heat exchange passages and a fluid connection, wherein the length of the header extends over at least one portion of a side of the heat exchanger block, and the header is defined by a cylinder jacket segment-shaped wall, and by a flat surface which runs parallel to the axis of the cylinder on the side of the heat exchanger block.
  • The general design of a plate heat exchanger is known from “The Standards of the Brazed Aluminum Plate-Fin Heat Exchanger Manufacturers' Association, ALPEMA,” Second Edition, 2000.
  • The heat exchanger block of a plate heat exchanger contains several layers of heat exchange passages, which are delimited from one another in each case by partitions. Cover strips as well as cover plates form the outer frame of the heat exchanger block. Additional separating edges that separate the heat exchange passages from one another for different substance flows can be provided within one layer.
  • Initially, the heat exchanger block is made of individual loose components which are then soldered in a soldering furnace, so that all components are tightly bonded to one another. Then, headers, which are provided with a fluid connection, are bonded via the inlet and outlet openings of the heat exchange passages. As headers, usually semi-cylindrical shells are used, but the headers can also have other shapes. The walls of the header generally form an exterior angle of 90° with the corresponding side of the block (see, for example, “The Standards of the Brazed Aluminum Plate-Fin Heat Exchanger Manufacturer's Association, ALPEMA,” Second Edition, 2000, FIGS. 1-5). A “fluid connection” is used for the entry of fluid into or the removal of fluid from the header. It is generally formed by a pipe socket, which is arranged in the semi-cylinder jacket of the header opposite the inlet or outlet openings; the pipelines for the incoming or outgoing streams of fluid are connected to these pipe sockets. Alternatively, the fluid connection can be arranged essentially perpendicular to the side of the heat exchanger block. In this arrangement, the connecting pipe extends the header, for example, over the edge of the block (see EP 1452817 A1, US 2005006076 A1, or U.S. Pat. No. 7,051,798) via which the header extends.
  • By a suitable arrangement of separating edges, plate heat exchangers can be used for the simultaneous heat exchange of many streams of fluid. For each of the streams of fluid, corresponding headers can then be provided via the respective inlet and outlet openings of the heat exchange passages and can be provided with pipelines (see, for example, “The Standards of the Brazed Aluminum Plate-Fin Heat Exchanger Manufacturer's Association, ALPEMA,” Second Edition, 2000, FIG. 1-1).
  • The term “side” of a heat exchanger block can be defined geometrically, i.e., it is an even surface of the heat exchanger block, which is generally designed in the shape of a parallelepiped. Generally, the “side” has a rectangular shape.
  • In headers used in plate heat exchangers, relatively high rates of flow often occur and cause a produce high pressure loss and/or an improper distribution of the fluid to the individual passages.
  • Therefore, one object of the invention is to provide a heat exchanger heaving improved flow characteristics within a header, particularly a header of a plate heat exchanger.
  • Upon further study of the specification and appended claims, further objects and advantages of this invention will become apparent to those skilled in the art.
  • These objects are achieved by designing a header so that the axis of the cylinder runs inside the cylinder segment. The cross-section of the header is thus formed by more than one semi-circle. Its opening angle on the side of the heat exchanger is less than 180°.
  • The cylinder jacket segment-shaped wall of the heater thus forms an exterior angle with the side of the heat exchanger block that is smaller than 90°. “Exterior angle” is defined here as the angle that lies outside the header. For the case where the wall section of the header in question is bonded exactly to the edge of the block, this exterior angle is formed outward by the angle of the wall with the conceptual extension of the block side over this edge.
  • The non-vertical connection of the header wall with the block side has the effect that the cross-section of the flow in the header can be enlarged without having to increase, in this case, its base area facing the heat exchanger block. Thus, an improved flow characteristic within the header is achieved, which in turn produces a reduced pressure loss and a more uniform dispersion of the fluid in the passages.
  • For example, according to the invention, instead of a semi-cylinder, more than half of a cylinder jacket is used as a header. If the cylindrical axis of the header shifts from the side of the heat exchanger with a uniform diameter by about 10% of the cylinder diameter, the pressure loss can be reduced by about 35%. This advantage is achieved even with the same nominal width of the header (i.e., the same connecting dimensions and the same wall strength) and even reduced base area. Moreover, this eccentricity can be infinitely variable. In contrast to the variation of the nominal width, which is possible only in large steps, the flow cross-section of the header can thus be adapted in a directed fashion to the respective application, and in particular an improper distribution can be efficiently avoided.
  • Thus, in one aspect of the inventor, there is provided:
  • A plate heat exchanger comprising:
  • a heat exchanger block having a plurality of heat exchange passages; and
  • a header attached to the heat exchanger block providing a flow connection between a portion of the heat exchange passages and a fluid connection;
  • wherein the length of the header extends over at least one portion of a side of the heat exchanger block, and the header is defined by a cylinder jacket segment-shaped wall (7), and by a flat surface (12) which runs parallel to the axis (13) of the cylinder on the side of the heat exchanger block; and
  • wherein said axis (13) of said cylinder jacket (7) is spaced at a distance from said flat surface (12).
  • The distance between the axis (13) and the flat surface (12), will be sufficient to decrease the pressure loss in a comparable heat exchanger wherein the axis (13) is in the same plane as the flat surface (12).
  • The invention can also be applied to other header shapes, for example those with an oval, asymmetrical and/or square cross-section.
  • The exterior angle between the cylinder jacket segment-shaped wall of the header and the side of the heat exchanger block is preferably 87° or less, in particular 81° or less, in particular 75° or less, and is at least equal to 40°, in particular at least equal to 55°, and in particular at least equal to 65°.
  • The cylinder jacket segment-shaped wall (7) of the header (2) and/or the heat exchanger block are preferably produced from aluminum. In this case, the exchanger block is thus an aluminum plate heat exchanger, as it is basically described in, for example, “The Standards of the Brazed Aluminum Plate-Fin Heat Exchanger Manufacturer's Association, ALPEMA,” Second Edition, 2000. In this connection, it is advantageous if the cylinder jacket segment-shaped wall (7) of the header (2) and the heat exchanger block are connected to one another by friction, for example by a soldered or welded joint.
  • The entire disclosures of all applications, patents and publications, cited above and below and also including application's priority application EP 05026404.3 filed Dec. 2, 2005. are hereby incorporated by reference.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • Various other features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understood when considered in conjunction with the accompanying drawings wherein:
  • FIGS. 1 and 2 show a first embodiment of a plate heat exchanger with a lateral connection, designed according to the invention, in two different side views rotated with respect to one another by 90°; and
  • FIGS. 3 and 4 show a second embodiment of a plate heat exchanger with a central connection, designed according to the invention, in two different side views rotated with respect to one another by 90°.
  • In the Figures, the following general features of the invention are shown: a heat exchanger block 1 (e.g., square), a header 2 configured according to the invention, a fluid connection 3, and a pipeline 4 that connected to the fluid connection 3. The header 2 shown in the Figures can be a fluid intake header or a fluid discharge header.
  • Of course, the plate heat exchanger according to the invention will have headers additional to the header shown in the individual Figures. These additional headers can be designed conventionally, or can be designed like the header according to the invention. Any combination of the headers according to the invention and conventional headers is possible within the scope of the invention.
  • As shown in, for example, FIG. 1, header 2 is arranged on the side 5 of the heat exchanger block 1 and designed in the form of a cylinder segment with an opening angle 6 of more than 180°, for example about 200°. The header 2 is defined by a cylinder jacket segment-shaped wall 7 and a flat surface 12. The flat surface 12 runs to the side 5 of the heat exchanger block 1. The cylinder jacket segment-shaped wall 7 of the header 2 forms an exterior angle 8 with the side 5. (To make the exterior angle visible, a tangential surface 9 of the header wall 7 is indicated in FIG. 2.)
  • The axis of the cylinder 13, i.e., the axis of symmetry of the cylinder jacket 7, runs inside the header 2 at a distance 11 to the flat surface 12.
  • The two embodiments are distinguished by the orientation of the fluid connection 3. In FIG. 1, the fluid connection 3 is oriented perpendicular to the side 5 of the block 1. The fluid thus flows in and out via the pipeline 4 parallel to the side 5. In particular, if it is a feed pipe, a baffle 10 can be provided in the pipeline 4, as it is described in the prior German Patent Application 102005055676.0 (filed Nov. 22, 2005), U.S. patent application Ser. No. 11/589,710 (filed Oct. 31, 2006), and the applications corresponding thereto. The baffle in this case is not arranged on the axis of the cylinder of the pipeline, but rather at a distance 11 to the latter. The pipeline 4 has a cylindrical shape and extends toward the left (not shown in FIG. 1).
  • In the variant of FIGS. 3 and 4, the fluid connection 3, is oriented parallel to the side 5. In the drawings, the fluid flows in and out in vertical direction through the pipeline 4.
  • In an alternative embodiment of the invention, which is not shown in the drawings, the header 2 extends over the entire side 5 of the heat exchanger block. The two axial edges of the cylindrical wall of the header in this case run along two edges of the heat exchanger block.
  • The preceding examples can be repeated with similar success by substituting the generically or specifically described reactants and/or operating conditions of this invention for those used in the preceding examples.
  • From the foregoing description, one skilled in the art can easily ascertain the essential characteristics of this invention and, without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions.

Claims (19)

1. A plate heat exchanger comprising:
a heat exchanger block having a plurality of heat exchange passages; and
a header attached to the heat exchanger block providing a flow connection between a portion of the heat exchange passages and a fluid connection;
wherein the length of the header extends over at least one portion of a side of the heat exchanger block, and the header is defined by a cylinder jacket segment-shaped wall (7), and by a flat surface (12) which runs parallel to the axis (13) of the cylinder on the side of the heat exchanger block; and
wherein said axis (13) of said cylinder jacket (7) is spaced at a distance from said flat surface (12).
2. A plate heat exchanger according to claim 1, wherein said axis (13) of said cylinder jacket (7) is parallel to said flat surface (12).
3. A plate heat exchanger according to claim 1, wherein the exterior angle (8) between said cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is 87° or less.
4. A plate heat exchanger according to claim 3, wherein the exterior angle (8) between said cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is 81° or less.
5. A plate heat exchanger according to claim 4, wherein the exterior angle (8) between said cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is 75° or less.
6. A plate heat exchanger according to claim 1, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 40°.
7. A plate heat exchanger according to claim 6, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 55°.
8. A plate heat exchanger according to claim 7, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 65°.
9. A plate heat exchanger according to claim 3, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 40°.
10. A plate heat exchanger according to claim 3, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 55°.
11. A plate heat exchanger according to claim 3, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 65°.
12. A plate heat exchanger according to claim 4, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 40°.
13. A plate heat exchanger according to claim 4, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 55°.
14. A plate heat exchanger according to claim 4, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 65°.
15. A plate heat exchanger according to claim 5, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 40°.
16. A plate heat exchanger according to claim 5, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 55°.
17. A plate heat exchanger according to claim 5, wherein the exterior angle (8) between the cylinder jacket segment-shaped wall (7) of the header and the side of the heat exchanger block is at least 65°.
18. A plate heat exchanger according to claim 1, wherein the cylinder jacket segment-shaped wall (7) of said header (2) and/or the heat exchanger block are produced from aluminum.
19. A plate heat exchanger according to claim 1, wherein the cylinder jacket segment-shaped wall (7) of the header (2) and the heat exchanger block are connected to one another by friction.
US11/607,094 2005-12-02 2006-12-01 Plate heat exchanger Abandoned US20070137844A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05026404.3 2005-12-02
EP20050026404 EP1793192A1 (en) 2005-12-02 2005-12-02 Plate heat exchanger

Publications (1)

Publication Number Publication Date
US20070137844A1 true US20070137844A1 (en) 2007-06-21

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US11/607,094 Abandoned US20070137844A1 (en) 2005-12-02 2006-12-01 Plate heat exchanger

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US (1) US20070137844A1 (en)
EP (1) EP1793192A1 (en)
JP (1) JP2007155317A (en)
CN (1) CN1982833A (en)

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US828807A (en) * 1904-11-02 1906-08-14 Andrew Bolton Apparatus for superheating steam.
US2267905A (en) * 1939-12-04 1941-12-30 Frantz Peter Heating apparatus
US2602647A (en) * 1951-03-30 1952-07-08 Standard Oil Co Tubular contactor with conical distribution plate
US2875986A (en) * 1957-04-12 1959-03-03 Ferrotherm Company Heat exchanger
US3216495A (en) * 1963-08-07 1965-11-09 Gen Motors Corp Stacked plate regenerators
US3255818A (en) * 1964-03-09 1966-06-14 Gen Motors Corp Involute plate heat exchanger
US3792842A (en) * 1972-05-06 1974-02-19 Kobe Steel Ltd Rectifying tower
US3852166A (en) * 1973-07-20 1974-12-03 Johnson & Co Inc A Process for separating hydrocarbon materials
US4276927A (en) * 1979-06-04 1981-07-07 The Trane Company Plate type heat exchanger
US4310960A (en) * 1973-04-16 1982-01-19 The Garrett Corporation Method of fabrication of a formed plate, counterflow fluid heat exchanger and apparatus thereof
US4569391A (en) * 1984-07-16 1986-02-11 Harsco Corporation Compact heat exchanger
US5088552A (en) * 1987-07-13 1992-02-18 Racert Oy Method of constructing a heat exchanger and a heat exchanger constructed by using that method
US5144809A (en) * 1990-08-07 1992-09-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Apparatus for production of nitrogen
US5261485A (en) * 1991-08-21 1993-11-16 Hpd, Incorporated Slurry distributor
US5324452A (en) * 1992-07-08 1994-06-28 Air Products And Chemicals, Inc. Integrated plate-fin heat exchange reformation
US5775412A (en) * 1996-01-11 1998-07-07 Gidding Engineering, Inc. High pressure dense heat transfer area heat exchanger
US6267176B1 (en) * 2000-02-11 2001-07-31 Honeywell International Inc. Weld-free heat exchanger assembly
US20030182785A1 (en) * 2002-03-28 2003-10-02 Harkins Bruce David Method for attaching an air duct to a recuperator core
US20050066524A1 (en) * 2003-02-25 2005-03-31 Stefan Moeller Method for producing a heat exchanger
US7051798B2 (en) * 2003-02-25 2006-05-30 Linde Aktiengesellschaft Heat exchanger
US7228892B2 (en) * 2001-03-27 2007-06-12 Rekuperator Svenska Ab Heat exchanger device and a method for manufacturing the same

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US828807A (en) * 1904-11-02 1906-08-14 Andrew Bolton Apparatus for superheating steam.
US2267905A (en) * 1939-12-04 1941-12-30 Frantz Peter Heating apparatus
US2602647A (en) * 1951-03-30 1952-07-08 Standard Oil Co Tubular contactor with conical distribution plate
US2875986A (en) * 1957-04-12 1959-03-03 Ferrotherm Company Heat exchanger
US3216495A (en) * 1963-08-07 1965-11-09 Gen Motors Corp Stacked plate regenerators
US3255818A (en) * 1964-03-09 1966-06-14 Gen Motors Corp Involute plate heat exchanger
US3792842A (en) * 1972-05-06 1974-02-19 Kobe Steel Ltd Rectifying tower
US4310960A (en) * 1973-04-16 1982-01-19 The Garrett Corporation Method of fabrication of a formed plate, counterflow fluid heat exchanger and apparatus thereof
US3852166A (en) * 1973-07-20 1974-12-03 Johnson & Co Inc A Process for separating hydrocarbon materials
US4276927A (en) * 1979-06-04 1981-07-07 The Trane Company Plate type heat exchanger
US4569391A (en) * 1984-07-16 1986-02-11 Harsco Corporation Compact heat exchanger
US5088552A (en) * 1987-07-13 1992-02-18 Racert Oy Method of constructing a heat exchanger and a heat exchanger constructed by using that method
US5144809A (en) * 1990-08-07 1992-09-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Apparatus for production of nitrogen
US5261485A (en) * 1991-08-21 1993-11-16 Hpd, Incorporated Slurry distributor
US5324452A (en) * 1992-07-08 1994-06-28 Air Products And Chemicals, Inc. Integrated plate-fin heat exchange reformation
US5775412A (en) * 1996-01-11 1998-07-07 Gidding Engineering, Inc. High pressure dense heat transfer area heat exchanger
US6267176B1 (en) * 2000-02-11 2001-07-31 Honeywell International Inc. Weld-free heat exchanger assembly
US7228892B2 (en) * 2001-03-27 2007-06-12 Rekuperator Svenska Ab Heat exchanger device and a method for manufacturing the same
US20030182785A1 (en) * 2002-03-28 2003-10-02 Harkins Bruce David Method for attaching an air duct to a recuperator core
US6860011B2 (en) * 2002-03-28 2005-03-01 Solar Turbines Inc. Method for attaching an air duct to a recuperator core
US20050066524A1 (en) * 2003-02-25 2005-03-31 Stefan Moeller Method for producing a heat exchanger
US7051798B2 (en) * 2003-02-25 2006-05-30 Linde Aktiengesellschaft Heat exchanger
US7100280B2 (en) * 2003-02-25 2006-09-05 Linde Aktiengesellschaft Method for producing a heat exchanger

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Publication number Publication date
JP2007155317A (en) 2007-06-21
CN1982833A (en) 2007-06-20
EP1793192A1 (en) 2007-06-06

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