EP1047913B1 - A plate heat exchanger having a wedge-shaped gasket - Google Patents
A plate heat exchanger having a wedge-shaped gasket Download PDFInfo
- Publication number
- EP1047913B1 EP1047913B1 EP99900442A EP99900442A EP1047913B1 EP 1047913 B1 EP1047913 B1 EP 1047913B1 EP 99900442 A EP99900442 A EP 99900442A EP 99900442 A EP99900442 A EP 99900442A EP 1047913 B1 EP1047913 B1 EP 1047913B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- plate
- gasket
- gaskets
- openings
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
- F28F3/10—Arrangements for sealing the margins
Definitions
- the invention relates to a plate heat exchanger comprising a plurality of stacked heat exchanger plates which each have four through openings, and gaskets which, on one side of each plate, define a first flow area comprising two through openings for the first heat exchanger medium, while the two other openings are blocked, and, on the other side of the plate, define a second flow area which has essentially the same extent as the first flow area, and which comprises two other flow openings for the second heat exchanger medium, while the two first openings are blocked, so that the stacked heat exchanger plates form a plate heat exchanger having at least one area for each plate which is just provided with gaskets on one side.
- Such heat exchanger plates are generally known from e.g. WO 88/03253, which discloses a plate heat exchanger comprising a plurality of heat exchanger plates having through openings defining inlet ports and outlet ports for two heat exchanger media, and rubber gaskets arranged between the heat exchanger plates.
- Each rubber gasket defines a flow area between two heat exchanger plates, said flow area comprising two openings which constitute an inlet port and an outlet port for a first heat exchanger medium, while it seals off the flow area from the other openings in the heat exchanger plates.
- Each of these other openings is provided with a ring-shaped rubber gasket to define a flow opening between two heat exchanger plates.
- the rubber gasket sealing off the flow area may be connected with the ring-shaped rubber gaskets around the two other holes by means of connecting members, which, however, do not seal tightly between the plates.
- the plate heat exchanger just contains one gasket between every second heat exchanger plate. This means that the plates of the plate heat exchanger tend to deflect in this area when the plate heat exchanger is pressurized in operation, which, of course, leads to an increased risk of leakage in precisely this area. If a leakage occurs in the bridge area, the leaking medium will flow out in the area between the bridge area and the ring-shaped gasket, following which it will be conveyed to the outer side of the heat exchanger where it may be detected.
- the area between the bridge area and the ring-shaped gasket is therefore also called the drain area or the drained area.
- the gasket groove for the rubber gasket is corrugated so that this portion of the plate obtains a greater rigidity.
- This approach makes great demands on the structure of the gasket itself, as this must conform closely to the corrugations of the plate to obtain an optimum gasket, which means that the cost price of the gasket is relatively high.
- the plates are arranged so as to rest against each other on the sides where there are no gaskets in order to prevent the individual plate from deflecting in this area.
- some of the plate material is used for forming elevations on the side of the plate which is opposite the gasket, less material is available to form the gasket groove, which results in an increased risk of the gasket being pressed out of the gasket groove when pressure is applied to the plate heat exchanger.
- there is a limit to the amount of material that can extend into the area without a gasket since there must be a passage for a heat exchanger medium on this side of the heat exchanger plate.
- the object of the present invention is to provide a plate heat exchanger which minimizes the risk of leakage in the areas in which gaskets are just provided between every second heat exchanger plate.
- the plate heat exchanger When the plate heat exchanger is arranged in this manner, it is ensured that while an increased pressure from the heat exchanger medium will try to deflect the heat exchanger plates in the areas in which there is just a gasket on one side and try to press the gaskets out of the gasket grooves, the gaskets will merely wedge themselves even more firmly between the plates, since the gaskets in said areas are wedge-shaped and the gasket grooves are shaped complementarily. This minimizes the risk of leakage in these areas compared to the known plate heat exchangers.
- the most difficult place to obtain a leakage-proof gasket in the known plate heat exchangers in which the gaskets are positioned essentially directly opposite each other on each side of the heat exchanger plate, is in the so-called bridge area in which there just one gasket for every second plate heat exchanger.
- the gaskets are therefore just wedge-shaped in the bridge areas which adjoin the flow area in the areas at the blocked openings.
- the gaskets are also positioned essentially directly opposite each other on each side of the heat exchanger plates, and in this embodiment the gaskets are just wedge-shaped in the areas around the blocked openings which face the flow area, since also in this area there is just one gasket between every second heat exchanger plate.
- the gaskets may also be wedge-shaped in both the bridge areas which adjoin the flow area in the areas at the blocked openings and in the areas around the blocked openings which face the flow area.
- the plate heat exchanger is arranged such that the gaskets are staggered with respect to each other on each side of the heat exchanger plates, they may be wedge-shaped over their entire length. It is ensured hereby that the plate heat exchanger is sealed in the same manner everywhere, and that, in principle, it therefore has no areas which are more critical with respect to leakage than others.
- the heat exchanger plates according to the invention are provided with a gasket groove shaped complementarily to the gasket.
- fig. 1 shows a traditional structure of a plate heat exchanger with heat exchanger plates and gaskets
- fig. 2 shows a heat exchanger plate with gaskets
- fig. 3 shows a section along the line A-A in fig. 2
- fig. 4 shows a heat exchanger plate with a staggered arrangement of gaskets
- fig. 5 schematically shows a section along the line B-B in fig. 4.
- Fig. 1 shows a traditional structure of a plate heat exchanger which comprises a row of identical heat exchanger plates 1 and a plurality of identical gaskets 2 arranged between the plates 1.
- Each plate 1 is provided with four through openings 3 and 4 which define inlet and outlet ports for a first heat exchanger medium and a second heat exchanger medium, respectively.
- the plates 1 consist of corrugated metal plates of e.g. stainless steel.
- the corrugations are shown in the flow area 5 of the plates 1, but the plates may also be provided with corrugations in the end areas around the inlet and outlet holes 3, 4. The corrugations serve to convey the heat exchanger media toward the flow areas 5 and to provide support for the plates 1 when these are stacked and clamped to form a plate heat exchanger.
- the plates 1 are provided with a gasket groove 6 on one side to hold a gasket 2 which will engage the opposite side of the gasket groove 6 when the plates 1 are clamped together to form the plate heat exchanger.
- the gasket groove 6 consists of a plane area between the corrugations of the plate 1.
- the plates 1 and the gaskets 2 are alternately turned 180°, so that a first heat exchanger medium flows on one side of each plate 1, while a second heat exchanger medium flows on the other side, thereby achieving heat exchange across the plates 1.
- Fig. 2 shows a heat exchanger plate 1 provided with a gasket 2 which extends around the flow area 5 and two inlet/outlet holes 3 so that a first heat exchanger medium has access to the flow area 5.
- the gasket 2 blocks the other two inlet/outlet holes 4 so that the second heat exchanger medium does not have access to this side of the plate 1.
- the gasket 2 (and the succeeding plate 1) is turned 180°, as shown in fig. 1, which means that the gasket 2 on this opposite side extends as shown in dashed line, so that it blocks the inlet/outlet holes 3, while the inlet/outlet holes 4 and the flow area 5 communicate.
- the gaskets 2 are preferably positioned directly opposite each other when the plate heat exchanger is assembled, but since the inlet/outlet holes 3, 4 alternately communicate with the flow area 5, there will be areas in which there are just gasket parts for every second plate 1. This applies to e.g. the so-called bridge area 7 and to the part 8 of the gasket 2 around the blocked inlet/outlet hole 4 which faces the flow area. Since, following assembly of the plate heat exchanger, the plates 1 are just supported in these areas between every second plate 1, the plates 1 tend to deflect in these areas when the plate heat exchanger is pressurized in operation. This is particularly problematic in connection with the bridge area 7 which has a relatively long extent.
- the deflection in the bridge area is minimized by corrugating the plate 1 close to the gasket 2, so that two plates 1 without a gasket 2 may adjoin each other in this area to compensate for the absence of a gasket 2.
- flow of the second heat exchanger medium must still be possible between the plates 1, which puts a limit to the degree of corrugation.
- this corrugation also has the effect that less material is available to hold the gasket 2, thereby increasing the risk of the gasket being pressed out of the gasket groove 6.
- Fig. 3 shows a section along the line A-A in fig. 2 when several plates 1 are stacked to form a plate heat exchanger in a preferred embodiment of the invention.
- the gasket 2 has a cross-section in the bridge area 7 which is substantially wedge-shaped over the entire width.
- the gasket 2 is positioned in a gasket groove 6 in the plates 1, and this gasket groove 6 has a shape complementary to the gasket 2.
- corrugations are shown on both sides of the gasket groove 6, which partly contribute to holding the gasket 2 in the gasket groove 6 and partly support the plates 1 against each other and impart rigidity to the plates 1.
- the gasket 2 is shaped such that it closely matches the corrugations of the plates 1.
- Fig. 4 shows an alternative heat exchanger plate 11 with staggered gasket grooves on each side, so that on one side of the plate 11 (shown in solid line) the gasket 12 is staggered with respect to an identical gasket 12 turned 180° on the other side (shown in dashed line).
- the gasket 12 When the gasket 12 is positioned in this manner with respect to the plate 11, it may be wedge-shaped over its entire extent, it being possible to provide the plate 11 with oppositely directed inclined faces to form staggered gasket grooves on each side of the plate 11.
- fig. 5 shows a basic section along the line B-B in fig. 4 and illustrates the structure of a plate heat exchanger with staggered gaskets 12 positioned in staggered gasket grooves 13, 14 on each side of the plate 11 to support the gaskets 12.
- one side (the upper side) of the gaskets 12 extends in parallel with the extent of the heat exchanger plates 11, while the other side (the underside) extends obliquely with respect thereto, so that the cross-section as a whole is wedge-shaped.
Description
The invention relates to a plate heat exchanger comprising
a plurality of stacked heat exchanger plates which
each have four through openings, and gaskets which, on
one side of each plate, define a first flow area comprising
two through openings for the first heat exchanger medium,
while the two other openings are blocked, and, on
the other side of the plate, define a second flow area
which has essentially the same extent as the first flow
area, and which comprises two other flow openings for the
second heat exchanger medium, while the two first openings
are blocked, so that the stacked heat exchanger
plates form a plate heat exchanger having at least one
area for each plate which is just provided with gaskets
on one side.
Such heat exchanger plates are generally known from e.g.
WO 88/03253, which discloses a plate heat exchanger comprising
a plurality of heat exchanger plates having
through openings defining inlet ports and outlet ports
for two heat exchanger media, and rubber gaskets arranged
between the heat exchanger plates. Each rubber gasket defines
a flow area between two heat exchanger plates, said
flow area comprising two openings which constitute an inlet
port and an outlet port for a first heat exchanger
medium, while it seals off the flow area from the other
openings in the heat exchanger plates. Each of these
other openings is provided with a ring-shaped rubber gasket
to define a flow opening between two heat exchanger
plates. The rubber gasket sealing off the flow area may
be connected with the ring-shaped rubber gaskets around
the two other holes by means of connecting members,
which, however, do not seal tightly between the plates.
It is generally known that the most difficult place to
achieve a leakage-proof gasket is in the area between the
flow area and the blocked opening - the so-called bridge
area - as, in this area, the plate heat exchanger just
contains one gasket between every second heat exchanger
plate. This means that the plates of the plate heat exchanger
tend to deflect in this area when the plate heat
exchanger is pressurized in operation, which, of course,
leads to an increased risk of leakage in precisely this
area. If a leakage occurs in the bridge area, the leaking
medium will flow out in the area between the bridge area
and the ring-shaped gasket, following which it will be
conveyed to the outer side of the heat exchanger where it
may be detected. The area between the bridge area and the
ring-shaped gasket is therefore also called the drain
area or the drained area.
Many attempts have been made at reinforcing the heat exchanger
plates in the areas where there is just one gasket
between every second plate, with the purpose of minimizing
the deflection when the heat exchanger is pressurized.
In the plate heat exchangers shown in GB-A-2 128 726 and
US-A-4 635 714, the gasket groove for the rubber gasket
is corrugated so that this portion of the plate obtains a
greater rigidity. This approach, however, makes great demands
on the structure of the gasket itself, as this must
conform closely to the corrugations of the plate to obtain
an optimum gasket, which means that the cost price
of the gasket is relatively high.
In the plate heat exchangers shown in US-A-3 792 730, US-A-4
063 591 and US-A-4 660 633, the plates are arranged
so as to rest against each other on the sides where there
are no gaskets in order to prevent the individual plate
from deflecting in this area. As in this approach some of
the plate material is used for forming elevations on the
side of the plate which is opposite the gasket, less material
is available to form the gasket groove, which results
in an increased risk of the gasket being pressed
out of the gasket groove when pressure is applied to the
plate heat exchanger. Furthermore, there is a limit to
the amount of material that can extend into the area
without a gasket, since there must be a passage for a
heat exchanger medium on this side of the heat exchanger
plate.
The object of the present invention is to provide a plate
heat exchanger which minimizes the risk of leakage in the
areas in which gaskets are just provided between every
second heat exchanger plate.
This is achieved by arranging the plate heat exchanger
mentioned in the opening paragraph such that the gasket,
at least in an area in which gaskets are just provided
between every second plate, has a cross-section which is
wedge-shaped over a considerable part of the width of the
gasket with the widest side facing the heat exchanger medium
and the narrowest side facing away from the heat exchanger
medium, and that each heat exchanger plate in
this area has a complementarily shaped gasket groove to
support the gasket.
When the plate heat exchanger is arranged in this manner,
it is ensured that while an increased pressure from the
heat exchanger medium will try to deflect the heat exchanger
plates in the areas in which there is just a gasket
on one side and try to press the gaskets out of the
gasket grooves, the gaskets will merely wedge themselves
even more firmly between the plates, since the gaskets in
said areas are wedge-shaped and the gasket grooves are
shaped complementarily. This minimizes the risk of leakage
in these areas compared to the known plate heat
exchangers.
As mentioned previously, the most difficult place to obtain
a leakage-proof gasket in the known plate heat exchangers
in which the gaskets are positioned essentially
directly opposite each other on each side of the heat exchanger
plate, is in the so-called bridge area in which
there just one gasket for every second plate heat exchanger.
In a preferred embodiment for use in this type
of plate heat exchangers, the gaskets are therefore just
wedge-shaped in the bridge areas which adjoin the flow
area in the areas at the blocked openings.
In another embodiment, the gaskets are also positioned
essentially directly opposite each other on each side of
the heat exchanger plates, and in this embodiment the
gaskets are just wedge-shaped in the areas around the
blocked openings which face the flow area, since also in
this area there is just one gasket between every second
heat exchanger plate.
The gaskets may also be wedge-shaped in both the bridge
areas which adjoin the flow area in the areas at the
blocked openings and in the areas around the blocked
openings which face the flow area.
If the plate heat exchanger is arranged such that the
gaskets are staggered with respect to each other on each
side of the heat exchanger plates, they may be wedge-shaped
over their entire length. It is ensured hereby
that the plate heat exchanger is sealed in the same manner
everywhere, and that, in principle, it therefore has
no areas which are more critical with respect to leakage
than others.
It applies to all the mentioned embodiments that the heat
exchanger plates according to the invention are provided
with a gasket groove shaped complementarily to the gasket.
The invention will now be explained more fully with reference
to the drawing, in which
fig. 1 shows a traditional structure of a plate heat exchanger with heat exchanger plates and gaskets,
fig. 2 shows a heat exchanger plate with gaskets,
fig. 3 shows a section along the line A-A in fig. 2,
fig. 4 shows a heat exchanger plate with a staggered arrangement of gaskets, and
fig. 5 schematically shows a section along the line B-B in fig. 4.
fig. 1 shows a traditional structure of a plate heat exchanger with heat exchanger plates and gaskets,
fig. 2 shows a heat exchanger plate with gaskets,
fig. 3 shows a section along the line A-A in fig. 2,
fig. 4 shows a heat exchanger plate with a staggered arrangement of gaskets, and
fig. 5 schematically shows a section along the line B-B in fig. 4.
Fig. 1 shows a traditional structure of a plate heat exchanger
which comprises a row of identical heat exchanger
plates 1 and a plurality of identical gaskets 2 arranged
between the plates 1. Each plate 1 is provided with four
through openings 3 and 4 which define inlet and outlet
ports for a first heat exchanger medium and a second heat
exchanger medium, respectively. In the preferred embodiment,
the plates 1 consist of corrugated metal plates of
e.g. stainless steel. In fig. 1, the corrugations are
shown in the flow area 5 of the plates 1, but the plates
may also be provided with corrugations in the end areas
around the inlet and outlet holes 3, 4. The corrugations
serve to convey the heat exchanger media toward the flow
areas 5 and to provide support for the plates 1 when
these are stacked and clamped to form a plate heat exchanger.
In the preferred embodiment, the plates 1 are provided
with a gasket groove 6 on one side to hold a gasket 2
which will engage the opposite side of the gasket groove
6 when the plates 1 are clamped together to form the
plate heat exchanger. The gasket groove 6 consists of a
plane area between the corrugations of the plate 1.
As will appear from fig. 1, the plates 1 and the gaskets
2 are alternately turned 180°, so that a first heat exchanger
medium flows on one side of each plate 1, while a
second heat exchanger medium flows on the other side,
thereby achieving heat exchange across the plates 1.
Fig. 2 shows a heat exchanger plate 1 provided with a
gasket 2 which extends around the flow area 5 and two inlet/outlet
holes 3 so that a first heat exchanger medium
has access to the flow area 5. The gasket 2 blocks the
other two inlet/outlet holes 4 so that the second heat
exchanger medium does not have access to this side of the
plate 1. On the opposite side of the plate 1, the gasket
2 (and the succeeding plate 1) is turned 180°, as shown
in fig. 1, which means that the gasket 2 on this opposite
side extends as shown in dashed line, so that it blocks
the inlet/outlet holes 3, while the inlet/outlet holes 4
and the flow area 5 communicate.
The gaskets 2 are preferably positioned directly opposite
each other when the plate heat exchanger is assembled,
but since the inlet/ outlet holes 3, 4 alternately communicate
with the flow area 5, there will be areas in which
there are just gasket parts for every second plate 1.
This applies to e.g. the so-called bridge area 7 and to
the part 8 of the gasket 2 around the blocked inlet/outlet
hole 4 which faces the flow area. Since, following
assembly of the plate heat exchanger, the plates 1
are just supported in these areas between every second
plate 1, the plates 1 tend to deflect in these areas when
the plate heat exchanger is pressurized in operation.
This is particularly problematic in connection with the
bridge area 7 which has a relatively long extent.
Traditionally, the deflection in the bridge area is minimized
by corrugating the plate 1 close to the gasket 2,
so that two plates 1 without a gasket 2 may adjoin each
other in this area to compensate for the absence of a
gasket 2. However, flow of the second heat exchanger medium
must still be possible between the plates 1, which
puts a limit to the degree of corrugation. Moreover, this
corrugation also has the effect that less material is
available to hold the gasket 2, thereby increasing the
risk of the gasket being pressed out of the gasket groove
6.
Fig. 3 shows a section along the line A-A in fig. 2 when
several plates 1 are stacked to form a plate heat exchanger
in a preferred embodiment of the invention. As
will appear, the gasket 2 has a cross-section in the
bridge area 7 which is substantially wedge-shaped over
the entire width. The gasket 2 is positioned in a gasket
groove 6 in the plates 1, and this gasket groove 6 has a
shape complementary to the gasket 2.
In fig. 3, corrugations are shown on both sides of the
gasket groove 6, which partly contribute to holding the
gasket 2 in the gasket groove 6 and partly support the
plates 1 against each other and impart rigidity to the
plates 1. In addition to being wedge-shaped over most of
its width, the gasket 2 is shaped such that it closely
matches the corrugations of the plates 1.
Fig. 4 shows an alternative heat exchanger plate 11 with
staggered gasket grooves on each side, so that on one
side of the plate 11 (shown in solid line) the gasket 12
is staggered with respect to an identical gasket 12
turned 180° on the other side (shown in dashed line).
When the gasket 12 is positioned in this manner with respect
to the plate 11, it may be wedge-shaped over its
entire extent, it being possible to provide the plate 11
with oppositely directed inclined faces to form staggered
gasket grooves on each side of the plate 11.
This is shown in more detail in fig. 5, which shows a basic
section along the line B-B in fig. 4 and illustrates
the structure of a plate heat exchanger with staggered
gaskets 12 positioned in staggered gasket grooves 13, 14
on each side of the plate 11 to support the gaskets 12.
As will appear, in the embodiment shown, one side (the
upper side) of the gaskets 12 extends in parallel with
the extent of the heat exchanger plates 11, while the
other side (the underside) extends obliquely with respect
thereto, so that the cross-section as a whole is wedge-shaped.
Claims (5)
- A plate heat exchanger comprising a plurality of stacked heat exchanger plates (1; 11) which each have four through openings (3, 4), and gaskets (2; 12) which, on one side of each plate (1; 11), define a first flow area (5) comprising two through openings (3) for a first heat exchanger medium, while the two other openings (4) are blocked, and, on the other side of the plate (1; 11), define a second flow area which has essentially the same extent as the first flow area (5), and which comprises two other through openings (4) for a second heat exchanger medium, while the two first openings (3) are blocked, so that the stacked heat exchanger plates (1; 11) form a plate heat exchanger having at least one area (7, 8) for each plate (1; 11) which is just provided with gaskets (2; 12) on one side, characterized in that the gasket (2; 12), at least in an area in which gaskets (2; 12) are just provided between every second plate (1; 11), has a cross-section which is wedge-shaped over a considerable part of the width of the gasket with the widest side facing the heat exchanger medium and the narrowest side facing away from the heat exchanger medium, and that each heat exchanger plate (1; 11) in this area has a complementarily shaped gasket groove (6; 14, 15) to support the gasket (2; 12).
- A plate heat exchanger according to claim 1,
characterized in that the gaskets (2) are positioned essentially directly opposite each other on each side of the heat exchanger plates (1), and that they are just wedge-shaped in the bridge areas (7) which adjoin the flow area (5) in the areas at the blocked openings (4). - A plate heat exchanger according to claim 1,
characterized in that the gaskets (2) are positioned essentially directly opposite each other on each side of the heat exchanger plates (1), and that they are just wedge-shaped in the areas (8) around the blocked openings (4) which face the flow area (5). - A plate heat exchanger according to claim 1,
characterized in that the gaskets (2) are positioned essentially directly opposite each other on each side of the heat exchanger plates (1), and that they are wedge-shaped in both the bridge areas (7) which adjoin the flow area (5) in the areas at the blocked openings (4), and in the areas (8) around the blocked openings (4) which face the flow area (5). - A plate heat exchanger according to claim 1,
characterized in that the gaskets (12) are staggered with respect to each other on each side of the heat exchanger plates (11), and that they are substantially wedge-shaped over their entire length.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK2898 | 1998-01-12 | ||
| DK2898A DK174780B1 (en) | 1998-01-12 | 1998-01-12 | Plate heat exchanger with wedge shaped gasket |
| PCT/DK1999/000012 WO1999035457A1 (en) | 1998-01-12 | 1999-01-11 | A plate heat exchanger having a wedge-shaped gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1047913A1 EP1047913A1 (en) | 2000-11-02 |
| EP1047913B1 true EP1047913B1 (en) | 2003-08-27 |
Family
ID=8088932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99900442A Expired - Lifetime EP1047913B1 (en) | 1998-01-12 | 1999-01-11 | A plate heat exchanger having a wedge-shaped gasket |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1047913B1 (en) |
| AU (1) | AU1960599A (en) |
| DE (1) | DE69910729T2 (en) |
| DK (1) | DK174780B1 (en) |
| WO (1) | WO1999035457A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE528847C2 (en) * | 2005-01-28 | 2007-02-27 | Alfa Laval Corp Ab | Gasket assembly for plate heat exchanger |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH204604A (en) * | 1936-04-22 | 1939-05-15 | Aluminium Plant & Vessel Co | Component for heat exchangers. |
| CH284574A (en) * | 1947-02-24 | 1952-07-31 | Cherry Burrell Corp | Plate for an apparatus of the kind in which the plates are kept parallel to one another with joints between them to form a sealed circulation space between two neighboring plates. |
| US2790627A (en) * | 1955-01-03 | 1957-04-30 | Creamery Package Mfg Co | Plate type heat exchanger |
| DE1149027B (en) * | 1961-03-14 | 1963-05-22 | Basf Ag | Sealing arrangement for plate heat exchangers, consisting of softer seals that are between harder seals |
| US3195625A (en) * | 1961-11-08 | 1965-07-20 | Meredith C Thomson | Heat exchanger plate and seal |
| DE1952802A1 (en) * | 1969-10-21 | 1971-04-29 | Theodor Beck | Vario indicator for vehicles |
| EP0526679B1 (en) * | 1991-07-08 | 1995-09-13 | Apv Baker As | Heat exchanger with multi-walled plate elements |
-
1998
- 1998-01-12 DK DK2898A patent/DK174780B1/en not_active IP Right Cessation
-
1999
- 1999-01-11 AU AU19605/99A patent/AU1960599A/en not_active Abandoned
- 1999-01-11 EP EP99900442A patent/EP1047913B1/en not_active Expired - Lifetime
- 1999-01-11 DE DE69910729T patent/DE69910729T2/en not_active Expired - Fee Related
- 1999-01-11 WO PCT/DK1999/000012 patent/WO1999035457A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| DE69910729T2 (en) | 2004-06-17 |
| WO1999035457A1 (en) | 1999-07-15 |
| DE69910729D1 (en) | 2003-10-02 |
| AU1960599A (en) | 1999-07-26 |
| EP1047913A1 (en) | 2000-11-02 |
| DK174780B1 (en) | 2003-11-03 |
| DK2898A (en) | 1999-07-13 |
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