U.S. patent application number 14/517130 was filed with the patent office on 2015-04-23 for heat exchanger, set and method for forming the same.
The applicant listed for this patent is Dejatech Holding B.V.. Invention is credited to Jan Hubertus DECKERS, Paulus Mathijs Maria THIJSSEN.
Application Number | 20150107535 14/517130 |
Document ID | / |
Family ID | 49817226 |
Filed Date | 2015-04-23 |
United States Patent
Application |
20150107535 |
Kind Code |
A1 |
DECKERS; Jan Hubertus ; et
al. |
April 23, 2015 |
HEAT EXCHANGER, SET AND METHOD FOR FORMING THE SAME
Abstract
Heat exchanger comprising a first heat exchanging body having a
first end and an opposite second end, at least a flue gas channel
and at least a water channel, a longitudinal direction of the first
body extending between the first and second end thereof, and a
second heat exchanging body, having a first end and an opposite
second end, at least a flue gas channel and at least a water
channel, a longitudinal direction of the second body extending
between the first and second end thereof, wherein the first end of
the second body is connected to the second end of the first body,
wherein a burner chamber is provided at the first end of the first
body.
Inventors: |
DECKERS; Jan Hubertus;
(Belfeld, NL) ; THIJSSEN; Paulus Mathijs Maria;
(Belfeld, NL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Dejatech Holding B.V. |
Belfeld |
|
NL |
|
|
Family ID: |
49817226 |
Appl. No.: |
14/517130 |
Filed: |
October 17, 2014 |
Current U.S.
Class: |
122/18.4 ;
29/890.03 |
Current CPC
Class: |
Y10T 29/4935 20150115;
F24H 1/30 20130101; B21D 53/02 20130101; F24H 1/26 20130101; F24H
9/0026 20130101; F24H 1/145 20130101 |
Class at
Publication: |
122/18.4 ;
29/890.03 |
International
Class: |
F24H 1/14 20060101
F24H001/14; B21D 53/02 20060101 B21D053/02 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 18, 2013 |
NL |
2011646 |
Claims
1. Heat exchanger comprising a first heat exchanging body having a
first end and an opposite second end, at least a flue gas channel
and at least a water channel, a longitudinal direction of the first
body extending between the first and second end thereof, and a
second heat exchanging body, having a first end and an opposite
second end, at least a flue gas channel and at least a water
channel, a longitudinal direction of the second body extending
between the first and second end thereof, wherein the first end of
the second body is connected to the second end of the first body,
wherein a burner chamber is provided at the first end of the first
body.
2. Heat exchanger according to claim 1, wherein the at least one
flue gas channel of the first body is connected to the at least one
flue channel of the second body and the at least one water channel
of the first body is connected to the at least one water channel of
the second body.
3. Heat exchanger according to claim 1 wherein the at least one
flue channel of the first body has a main flue gas direction
extending substantially parallel to the longitudinal direction of
the first body and wherein preferably the at least one flue channel
of the second body has a main flue gas direction extending
substantially parallel to the longitudinal direction of the second
body.
4. Heat exchanger according to claim 1, wherein a third heat
exchanger body is provided having a first end and an opposite
second end, at least a flue gas channel and at least a water
channel, a longitudinal direction of the third body extending
between the first and second end thereof, wherein the first end of
the third body is connected to the second end of the second body,
wherein the at least one flue gas channel of the second body is
connected to the at least one flue channel of the third body and
the at least one water channel of the second body is connected to
the at least one water channel of the third body.
5. Heat exchanger according to claim 4, wherein the second and
third heat exchanger bodies are similar in shape and dimensions,
preferably identical.
6. Heat exchanger according to claim 1, wherein the burner space is
provided in the first heat exchanger body.
7. Heat exchanger according to claim 1, wherein the heat exchanger
bodies have been made from light metal, especially aluminum or
aluminum alloy.
8. Heat exchanger according to claim 1, wherein the or each water
channel in the first heat exchanger has an increasing cross section
in said main flow direction, wherein at least one of the second and
third heat exchanger body preferably has a substantially constant
cross section.
9. Set of a first heat exchanger body and at least one second heat
exchanger body, wherein the first heat exchanger body has first
coupling elements at a lower end and the or each second heat
exchanger has complementary second coupling elements at an upper
end, such that the or each second heat exchanger body can be
coupled to the first heat exchanger body or to a second heat
exchanger body at a downstream position for flue gasses.
10. Set according to claim 9, further comprising a burner and/or a
burner lid and an end piece for connecting to a flue gas exhaust,
wherein an upper end of the first heat exchanger body and the
burner and/or the burner lid are provided with complementary
coupling elements for connecting the burner and/or the burner lid
to the upper end of the first heat exchanger body and wherein the
end piece is provided with second coupling elements complementary
to the first coupling elements of the first heat exchanger body and
wherein preferably the or each second heat exchanger body is also
provided with first coupling elements, such that the end piece can
be coupled to either the lower end of the first heat exchanger body
or the lower end of a second heat exchanger body.
11. Heating boiler comprising a heat exchanger according to claim
1.
12. Method for forming a heat exchanger, wherein a first heat
exchanger body is provided with a flue gas channel or part thereof
having a main flue gas flow direction, wherein a second heat
exchanger body comprising a flue gas channel or part thereof having
a main flue gas flow direction, wherein the second heat exchanger
body is connected at a downstream end of said first heat exchanger
body.
13. Method according to claim 12, wherein a desired capacity is
defined, and wherein based on said capacity a first a first and
second or a first and two second heat exchanger bodies are
selected, wherein a burner is provided at a first end of the first
heat exchanger and: when only a first heat exchanger body is
selected, an end piece is connected to the opposite second end of
the first heat exchanger body; or when a first and a second heat
exchanger body are selected, a first end of the second heat
exchanger body is coupled to a second end of the first heat
exchanger body and an end piece is connected to a second end of the
second heat exchanger; or when a first and at least two second heat
exchanger bodies are selected, a first end of a first second heat
exchanger body is coupled to a second end of the first heat
exchanger body and a first end of a second second heat exchanger
body is connected to a second end of the first second heat
exchanger, and wherein an end piece is provided for connecting to a
second end of the second second heat exchanger body.
14. Heating boiler constructed using a set according to claim 9.
Description
[0001] The invention relates to a heat exchanger comprising a first
heat exchanging body having a first end and an opposite second end,
at least a flue gas channel and at least a water channel, a
longitudinal direction of the first body extending between the
first and second end thereof, and a second heat exchanging body,
having a first end and an opposite second end, at least a flue gas
channel and at least a water channel, a longitudinal direction of
the second body extending between the first and second end
thereof
[0002] In such known heat exchanger the first and second heat
exchanger bodies are substantially identical and are positioned
side by side. Each of the first and second heat exchanger bodies
has a burner space and a flue gas exhaust connecting element. In
each burner space a burner is provided, wherein the burners are
coupled to the same gas supply . The exhaust connecting elements of
the first and second heat exchanging bodies are coupled to the same
flue gas exhaust. The water channels of the first and second heat
exchanger bodies are coupled in parallel to a common water supply
and a common water exhaust.
[0003] In this known heat exchanger each of the exchanger bodies
has the same capacity, each added heat exchanger body will increase
the overall capacity with the same mount. Such heat exchanger is
however complicated and expensive, especially since each added body
requires an extra burner or a burner adapted to the extended width
of the combined heat exchanger elements, whereas the flue gas
exhaust and gas supply, as well as the connecting water ducts have
to be adjusted for each number of heat exchanger bodies. Moreover
the different numbers of heat exchanger bodies in a heat exchanger
will require a different ground area.
[0004] An aim of the present disclosure is to provide an
alternative heat exchanger. Moreover an aim is to provide for a
heat exchanger which can relatively easily be amended for a
different capacity. An aim of the present disclosure is to provide
for a series of heat exchangers having different capacities but
substantially the same ground plane.
[0005] In a first aspect a heat exchanger according to the
disclosure can be characterized by comprising a first heat
exchanging body having a first end and an opposite second end, at
least a flue gas channel and at least a water channel, a
longitudinal direction of the first body extending between the
first and second end thereof, and a second heat exchanging body,
having a first end and an opposite second end, at least a flue gas
channel and at least a water channel, a longitudinal direction of
the second body extending between the first and second end thereof.
The first end of the second body is connected to the second end of
the first body, wherein a burner chamber is provided at the first
end of the first body.
[0006] The first and second heat exchanger bodies can be
substantially the same, except for a length measured in the
longitudinal direction thereof. In particular the longitudinal
length of the second body can be smaller than the longitudinal
length of the first body.
[0007] In an aspect a further second heat exchanger body can be
connected to the second end of the second heat exchanger body
connected to the first heat exchanger body. In an aspect a series
of second heat exchanger bodies can be connected in series to the
second end of the first heat exchanger body.
[0008] In an aspect a third heat exchanger body can be provided
having a first end and an opposite second end, at least a flue gas
channel and at least a water channel, a longitudinal direction of
the third body extending between the first and second end thereof,
wherein the first end of the third body is connected to the second
end of the second body, wherein the at least one flue gas channel
of the second body is connected to the at least one flue channel of
the third body and the at least one water channel of the second
body is connected to the at least one water channel of the third
body. The third heat exchanger body can be substantially equal to
the first and/or second heat exchanger body except for its
longitudinal length between the opposite first and second end,
which may be shorter of longer than the longitudinal length of the
first and/or second heat exchanger bodies.
[0009] In an aspect the disclosure can comprise a set of a first
heat exchanger body and at least one second heat exchanger body,
wherein the first heat exchanger body has first coupling elements
at a lower end and the or each second heat exchanger has
complementary second coupling elements at an upper end, such that
the or each second heat exchanger body can be coupled to the first
heat exchanger body or to a second heat exchanger body at a
downstream position for flue gasses.
[0010] A heat exchanger according to the disclosure can be
comprised in a boiler such as a central heating boiler or a tap
water boiler or a combined central heating and tap water boiler.
Such boiler can for example be a condensing boiler, a high
efficiency boiler or a an improved efficiency boiler.
[0011] In an aspect the present disclosure can be directed to a
method for forming a heat exchanger, wherein a first heat exchanger
body is provided with a flue gas channel or part thereof having a
main flue gas flow direction, wherein a second heat exchanger body
comprising a flue gas channel or part thereof having a main flue
gas flow direction, wherein the second heat exchanger body is
connected at a downstream end of said first heat exchanger
body.
[0012] In further elucidation of the present disclosure embodiments
of a heat exchanger, set, heating boiler and method will be
described, with reference to the drawings, which are only shown in
elucidation and should not be understood as limiting the disclosure
in any way. The drawings show:
[0013] FIG. 1 a heat exchanger comprising a first heat exchanger
body and two further heat exchanger bodies, in cross sectional side
view;
[0014] FIG. 2 a heat exchanger comprising a first heat exchanger
body and one further heat exchanger body, in cross sectional side
view;
[0015] FIG. 2A the cross section along the line IIA-IIA;
[0016] FIG. 3 in cross sectional view a first and second heat
exchanger body are shown, spaced apart from each other;
[0017] FIG. 4 in cross sectional side view a thing boiler
comprising a heat exchanger according to FIG. 1, connected to a
heating circuit and a flue gas exhaust.
[0018] In this description different embodiments of heat exchangers
and parts thereof, as well a heating circuit equipped therewith are
disclosed and described by way of example only. In these
embodiments the same or similar parts have the same or similar
reference signs. Combinations of parts of the embodiments shown are
also considered to have been disclosed herein. In this description
a heat exchanger has to be understood as an exchanger for
exchanging heat between heated flue gasses from a burner and water
flowing through one or more water channels within said heat
exchanger. Preferably a burner space is provided into which a
burner can be inserted, such that said heated flue gasses are
actively created, during use, within said heat exchanger. In an
alternative the burner can be at least partly integrated in the
heat exchanger, for example by extrusion, casting and/or machining
Such heat exchangers are especially, but not exclusively suitable
in domestic and commercial heating systems such as boilers and
central heating systems, such as for space heating and/or tap water
heating systems.
[0019] In the following description molding or casting, possibly
combined with machining of extruded parts, shall be described as an
advantageous means for manufacturing parts of such heat exchanger.
Nevertheless, some or all of these parts can also be made
differently, such as but not limited to injection moulding, sand or
otherwise lost core moulding or casting or the like, possibly
combined with machining, such as but not limited to grinding,
turning, milling, drilling and the like known machining methods.
Parts of heat exchangers according to this disclosure can be made
differently, for example by pressing, setting, folding, welding or
any other suitable means known to skilled person.
[0020] In this disclosure embodiments of heat exchangers shall be
disclosed by way of example only. In general terms an element of
the present disclosure is that heat exchanger bodies can be
connected in series in a longitudinal direction of the heat
exchanger bodies, especially of a main flow direction of flue
gasses through the heat exchanger bodies.
[0021] A heat exchanger 1 is shown in the embodiments comprising a
first heat exchanging body 2 having a first end 3 and an opposite
second end 4. At least a flue gas channel 5 is provided extending
through the first heat exchanging body 2 and at least a water
channel 6. The first heat exchanger body has a longitudinal
direction L.sub.1 extending between the first and second end 3, 4
thereof. A second heat exchanging body 7 is shown, having a first
end 8 and an opposite second end 9, at least a flue gas channel 10
extending through the second heat exchanger body 7, and comprising
at least a water channel 11. The second heat exchanger body 7 has a
longitudinal direction L.sub.2 of extending between the first and
second end 8, 9 thereof. The first end 8 of the second body 7 is
connected to the second end 4 of the first body 2. A burner chamber
12 is provided at the first end 3 of the first body 2. In the
embodiments shown a burner 13 is shown extending at least partly
into the burner space 12.
[0022] In the embodiments shown the at least one flue gas channel 5
of the first body 2 is connected to the at least one flue channel
10 of the second body 7 and the at least one water channel 6 of the
first body 2 is connected to the at least one water channel 11 of
the second body 7.
[0023] In embodiments shown the at least one flue channel 5 of the
first body 2 has a main flue gas direction D.sub.1 extending
substantially parallel to the longitudinal direction L.sub.1 of the
first body 2. The at least one flue channel 10 of the second body 7
has a main flue gas direction D.sub.2 extending substantially
parallel to the longitudinal direction L.sub.2 of the second body
7.
[0024] In the embodiments shown the first and second heat exchanger
bodies 2, 7 can have a substantially block shaped outer
configuration with substantially flat first and second ends 3, 4;
8, 9; 18, 19, substantially flat front 14 and back 15 and
substantially flat sides 16 with a width W1 and a depth W2.
[0025] In the embodiment shown in FIG. 1 a third heat exchanger
body 17 is provided. It is shown substantially identical to the
second heat exchanger body 7. It has a first end 18 and an opposite
second end 19, at least a flue gas channel 20 and at least a water
channel 21. It has a longitudinal direction L.sub.3 extending
between the first 18 and second end 19 thereof. The first end 18 of
the third body 17 is connected to the second end 9 of the second
body 7. At least one flue gas channel 10 of the second body 7 is
connected to the at least one flue channel 20 of the third body 17
and the at least one water channel 11 of the second body 7 is
connected to the at least one water channel 21 of the third body
17. Thus at least one continuous flue gas channel and at least one
continuous water channel can be provided through the heat exchanger
can be obtained.
[0026] The second and third heat exchanger bodies 7, 17 can be
similar in shape and dimensions, preferably identical, but can also
be different, for example have a longitudinal length L.sub.2,
L.sub.3, which in turn may be different from the longitudinal
length L.sub.1 of the first heat exchanger body 2. In embodiments
the ratio of the longitudinal lengths L.sub.1 and L.sub.2 of the
first and second heat exchanger bodies 2, 7 can for example be
about 2:1 or 3:1. The ratio of the longitudinal lengths L.sub.2,
L.sub.3 of the second and third heat exchanger bodies 7, 17 can for
example be about 1:1 or 2:1. The ratio of the longitudinal lengths
L.sub.1, L.sub.2, L.sub.3 of the first, second and third heat
exchanger bodies 2, 7, 17 can for example be 2:1:1, 3:2:1, 4:2:1 or
4:3:2 or any other suitable ratio. By choosing a suitable ratio
between the longitudinal lengths L of the different bodies 2, 7
and/or 17 different heat exchangers with different heat capacities
can be constructed using one, two or more of the first, second
and/or third bodies. For example but not limited to a series of
heat exchangers having a capacity of 60 kW, 90 kW and 120kW, 40, 60
and 80 kW or 80, 120 and 140 kW.
[0027] In embodiments the burner space 12 is provided in the first
heat exchanger body 2, which can form part of or comprise a burner
13. Depending on the capacity wanted the burner capacity and type
can be chosen.
[0028] The heat exchanger bodies have been made from light metal,
especially aluminum or aluminum alloy. Other suitable light metal
can for example be magnesium or magnesium alloy. Light metal is
considered to be non-ferro metal having a density of less than
about 4500 kg/m.sup.3. According to the invention for example
aluminum or aluminum alloy can be used having a density of about
2800 kg/m.sup.3 or less.
[0029] The or each water channel 6 in the first heat exchanger body
2 can have an increasing cross section in a main flow direction. In
embodiments the or each water channel of at least one of the second
and third heat exchanger body 7, 17 can have a substantially
constant cross section.
[0030] In the embodiment shown in FIG. 1 the heat exchanger has a
first and two second heat exchanger bodies 2, 7, 7. In the
embodiment shown in FIG. 2 the heat exchanger 1 has a first and a
second heat exchanger body 2, 7. In an embodiment a heat exchanger
can comprise only one heat exchanger body 2, for example only a
first heat exchanger body 2. A series of three such heat exchangers
could for example have capacities of 60, 90 and 120 kW, 60, 90 and
110 kW, 80, 120 and 160 kW or any other range. Also more or less
heat exchangers can be comprises in such series built with the same
bodies as modules.
[0031] FIG. 3 shows a set 25 of a first heat exchanger body 2 and
two further heat exchanger bodies. Such set will preferably
comprise at least a first heat exchanger body and at least one
second heat exchanger body. The first heat exchanger body has first
coupling elements at a lower end 4 and the or each second heat
exchanger 7 has complementary second coupling elements at an upper
end 8, such that the or each second heat exchanger body 7 can be
coupled to the first heat exchanger body 2 or to a second heat
exchanger body 7 at a downstream position for flue gasses.
[0032] A set 25 can further comprise a burner 13 and/or a burner
lid 27 and an end piece 26 for connecting to a flue gas exhaust 28.
An upper end 3 of the first heat exchanger body 2 and the burner 13
and/or the burner lid 27 can be provided with complementary
coupling elements for connecting the burner 13 and/or the burner
lid 27 to the upper end 3 of the first heat exchanger body 2. The
end piece 28 can be provided with second coupling elements
complementary to the first coupling elements of the first heat
exchanger body 2. The or each second heat exchanger body 7 can also
be provided with first coupling elements, such that the end piece
28 can be coupled to either the lower end 4 of the first heat
exchanger body 2 or the lower end 9 of a second heat exchanger body
7.
[0033] In embodiments the complementary first and second coupling
means can for example be formed by adjacent ends 3, 4; 8, 9; 18, 19
of heat exchanger bodies 2, 7, 17, burner 13 or burner plate 27
and/or end piece 26, such that they can be adhere, for example
glued to each other. Preferably a heat resistant, elastic bonding
agent is used. By way of example only, bonding can for example be
achieved by glue, for example but not limited to acrylic glue, two
or more component glue, PLEXUS MA 420, PERMABOND ES 550 or DOW
CORNING 7091. In alternative embodiments and/or additionally other
coupling means can be provided, such as nuts and bolts, screws,
clamps or the bodies can be welded to each other or in any other
suitable way be interconnected.
[0034] The water channel 6, 11 and/or 21 through the heat exchanger
1 can have a main flow direction W contrary to the main flow
direction D of flue gas through the flue gas channel 5, 10 and/or
20. This can for example be understood as that a water inlet 40 is
provided at a lower end of the heat exchanger 1 and a water exit 41
is provided at an upper end of the heat exchanger 1, with the
burner 13 provided at an upper end of the heat exchanger and a gas
exhaust at the lower end of the heat exchanger.
[0035] FIG. 4 shows schematically a heating boiler comprising a
heat exchanger according to the disclosure. The burner 13 is
connected to a gas supply line 30. A flue gas exhaust 31 such as a
chimney is connected to the end piece 28, and thus to the lower end
of the flue gas channel. A water circuit 32, for example comprising
at least a radiator 33 and/or a tap water heating system 34 such as
a tap water boiler is connected between the water inlet 40 and the
water outlet 41 of the water channel 6, 11 and/or 21.
[0036] As can be seen in FIG. 1-4, heat transferring surface
increasing elements 35 can be provided at least in part of the flue
gas channels 5, 10, and/or 20. These elements 35 can for example be
ribs, notches, pins or the like which can extend for example in
rows and/or columns and can have a main height extending
perpendicular to a main flow direction through the flue gas
channel. In a burner space, if present, the height of the elements
35 can increase in the flow direction D of flue gasses, such that
closest to the first end 3 the distance between facing free ends 36
of the pins on two opposite sides of the flue gas channel 6 is
larger than further down the flue gas channel 6.
[0037] Since the heat exchanger bodies 2, 7, 17 in a heat exchanger
1 according to the description are connected in series, one on top
of the other, a surface area P occupied by the heat exchanger can
be defined largely by the cross section of the heat exchangers,
irrespective of the number of heat exchanger bodies forming the
heat exchanger and thus irrespective of the capacity of the heat
exchanger. Such cross section can for example be substantially
perpendicular to the main direction of flow of flue gasses through
the flue gas channel extending through the bodies 2, 7 and/or 17.
Moreover only one burner 13 and one exhaust 31 are necessary.
[0038] In the disclosure each heat exchanger body 2, 7, 17 can be
made integrally, for example by an appropriate lost core method
such as but not limited to sand die casting, whereas they can
alternatively be made of two or more pieces, connected to each
other, for example again by gluing, welding, bonding, screwing or
any such known and suitable means. In the drawings such embodiments
are shown as examples. The water channels 6, 11, 21 preferably
spiral around the flue gas channels 5, 10, 20, such that water can
flow all around the heat exchanger bodies. Alternatively the water
channels can be provided differently, for example on two opposite
sides 14, 15 of each body 2, 7, 17, zig-zagging up or down. As can
be seen the elements 35 can extend across the full width of the
flue gas channel or such that a space is left between their ends
36.
[0039] The end piece 26 and the cap 27 can be made by any suitable
means and from any suitable material, such as but not limited to
cast or forged from metal, such as light metal. According to a
method for forming a heat exchanger, a first heat exchanger body is
provided with a flue gas channel or part thereof having a main flue
gas flow direction and a second heat exchanger body comprising a
flue gas channel or part thereof having a main flue gas flow
direction, wherein the second heat exchanger body is connected at a
downstream end of said first heat exchanger body. If so desired
further heat exchanger bodies can be coupled downstream from the
second heat exchanger body, in series.
[0040] In designing a heat exchanger in embodiments a desired
capacity of a heat exchanger or heating boiler is defined, wherein
based on said capacity a first or first and second or a first and
two or more further heat exchanger bodies are selected, for example
tow or more second heat exchanger bodies. A burner is provided at a
first end of the first heat exchange. In such method when only a
first heat exchanger body is selected, an end piece 28 can be
connected to the opposite second end 4 of the first heat exchanger
body 2. When a first 2 and a second heat exchanger body 7 are
selected, a first end 8 of the second heat exchanger body 7 is
coupled to a second end 4 of the first heat exchanger body 2 and an
end piece 28 is connected to a second end 9 of the second heat
exchanger body 7. When a first 2 and at least two second heat
exchanger bodies 7 are selected, a first end 8 of a first second
heat exchanger body 7 is coupled to a second end 4 of the first
heat exchanger body 2 and a first end 8 of a second second heat
exchanger body 7 is connected to a second end 9 of the first second
heat exchanger body 7. An end piece 28 can be provided for
connecting to a second end 9 of the second second heat exchanger
body 7. Obviously if more heat exchanger bodies are necessary they
can be coupled similarly in series with the heat exchanger bodies
2, 7 as discussed.
[0041] The invention is by no means limited to the embodiments as
shown and/or described in this description. Many variations thereof
are possible within the scope of the claims, including at least all
combinations of parts and elements of the embodiments and parts
thereof shown, in any combination or permutation. For example the
first and/or second and/or further heat exchanger can have other
cross sections and can for example have different cross sections,
as long as they can be connected to each other as indicated, for
forming at least one continuing flue gas path through the heat
exchanger. The bodies can be attached to each other using different
means, such as screws, fasteners, clamps, welds or the like. Also
other bonding agents can be used, for example two or more component
agents. Moreover, an even thickness of the bonding layers and heat
conducting properties through the connection thus formed can be
achieved in another way, for example by gluing tools and moulds
used for exact positioning of the parts during bonding, and/or by
providing heat conducting elements connected to both parts, such as
but not limited to pins, strips or similar, preferably metal
elements inserted in between the bonded parts or to them, crossing
said bonding connection. Shapes and dimensions, as well as
positions of the different parts can be changed within the scope of
the claims as pending.
[0042] These and other alterations and modifications are supposed
to be disclosed within the scope of the claims.
* * * * *