U.S. patent application number 12/528236 was filed with the patent office on 2010-12-23 for method of making a heat exchanger and heat exchanger obtained according to this method.
Invention is credited to Pierre Aphecetche, Frederic Caramanos, Bernard Seosse, Pierre Vironneau.
Application Number | 20100319891 12/528236 |
Document ID | / |
Family ID | 38461189 |
Filed Date | 2010-12-23 |
United States Patent
Application |
20100319891 |
Kind Code |
A1 |
Vironneau; Pierre ; et
al. |
December 23, 2010 |
METHOD OF MAKING A HEAT EXCHANGER AND HEAT EXCHANGER OBTAINED
ACCORDING TO THIS METHOD
Abstract
The present invention relates to methods for producing a heat
exchanger comprising banks 2, 3, 4 each defining a fluid flow, each
bank comprising two solid plates 11, 12 and spacer pieces to hold
the two plates in position. The method is characterized in that, in
order to produce at least one of the banks, there are five steps: A
producing an insert plate 20 comprising strips, bridges of weakness
35, 36, 37 connecting the strips and capable of breaking under
tension, and orifices separated by the walls 28, 29 and delimiting
two lanes 31, 32; B interposing the insert plate 20 between the two
plates 11, 12; C inserting a binder 41, 42 between the face 33 of
the lanes 31 and the face 1-12 of the plate 11, and between the
face 34-1 of the lanes 32 and the face 1-12 of the plate 12; D
applying a force to bring the two plates 11, 12 into contact with
the insert plate 20; E applying a force to part the two, upper and
lower, plates 11, 12, to break the bridges 36, 37, 38 and bend the
dividing walls 28, 29 so that, together with the two lanes, they
form a Z shape. Another subject of the present invention is a heat
exchanger produced according to the method of the invention.
Inventors: |
Vironneau; Pierre; (Portet
Sur Garonne, FR) ; Seosse; Bernard; (Saint Lon Les
Mines, FR) ; Aphecetche; Pierre; (Saint Vicent De
Paul, FR) ; Caramanos; Frederic; (Bidart,
FR) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Family ID: |
38461189 |
Appl. No.: |
12/528236 |
Filed: |
February 22, 2008 |
PCT Filed: |
February 22, 2008 |
PCT NO: |
PCT/FR2008/000237 |
371 Date: |
August 21, 2009 |
Current U.S.
Class: |
165/167 ;
29/890.039 |
Current CPC
Class: |
Y10T 29/49366 20150115;
F28F 2275/025 20130101; F28F 3/12 20130101; F28F 2250/104 20130101;
F28F 3/08 20130101; Y02P 80/156 20151101; B21D 53/04 20130101; Y02P
80/10 20151101; F28D 9/0062 20130101; F28F 2255/10 20130101 |
Class at
Publication: |
165/167 ;
29/890.039 |
International
Class: |
F28D 9/00 20060101
F28D009/00; F28F 3/08 20060101 F28F003/08; B21D 53/02 20060101
B21D053/02 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 23, 2007 |
FR |
0701295 |
Claims
1. Method for producing a heat exchanger comprising a plurality of
interconnecting banks each defining a fluid flow, each bank
comprising two solid plates, respectively the top plate and the
bottom plate produced in an impervious material, and spacing means
to keep the two solid plates at a spacing one from the other,
characterized in that the production of at least one of the said
banks includes the following steps: (A) producing an insert plate
comprising: a plurality of strips, bridges of weakness
interconnecting said strips such that they are parallel to each
other, said bridges of weakness being capable of breaking under
tension, and a plurality of openings produced in each strip such
that said openings, along the two longitudinal edges of each strip,
delimit two continuous lanes respectively the left lane and the
right lane, the openings being separated from each other by
partition walls that connect the two lanes, each lane having a top
face and a bottom face, (B) interposing said insert plate between
the two solid impervious plates, i.e. the top and bottom plate, (C)
interposing binding means between, on the one hand, the top face of
each left lane of all the strips and the bottom face of the top
plate, and, on the other hand, the bottom face of each right lane
of all the strips and the top face of the bottom plate, (D)
applying a first force to bring the two solid plates, the top and
bottom plate, into contact with the insert plate, such that all the
top faces of the left lanes adhere to the bottom face of the top
plate and all the bottom faces of the right lanes adhere to the top
face of the bottom plate, and (E) applying a second force to part
the two plates, i.e. the top and bottom plate one from the other in
such a manner that the bridges of weakness are broken and until the
partition walls between the openings form a non zero angle with the
two plates, the top and bottom plates.
2. Method according to claim 1, characterized in that the openings
in each strip are produced such that their edges delimiting the
left and right lanes are co-linear and parallel to the longitudinal
axis of said lanes.
3. Method according to, characterized in that said method consists
in using plates that are approximately between thirty and a
thousand microns thick.
4. Method according to, characterized in that the binding means
operate in accordance with at least one of the following functions:
bonding, brazing, welding.
5. Method according to claim 1, characterized in that said method
consists in applying said binding means by at least one of the two
following techniques, seriography and micro projection, on at least
one of the following elements: the top and bottom faces of the
lanes, the bottom face of the top plate and the top face of the
bottom plate.
6. Method according to claim 1, characterized in that said method
consists in producing said openings according to at least one of
the following techniques: micro cutting, stamping, laser cutting,
pressurized water jet spray, chemical milling or electrochemical
milling.
7. Method according to claim 1, characterized in that said method
consists in leaving a middle zone without any openings on at least
one of the two lateral strips of the insert plate.
8. Method according to claim 1, characterized in that said method
consists in producing the openings with one of the following forms:
rectangular, square, triangular or trapezoidal.
9. Method according to claim 1, characterized in that said method
consists in producing the openings with edges that do not include
sharp rims following a direction perpendicular to the plane of the
intermediary plate.
10. Method according to claim 1, characterized in that said method
consists in producing the plates (11, 12, 20) in at least one of
the following materials: aluminium, copper, aluminium-base alloy,
copper-base alloy.
11. Method according to claim 1, characterized in that said method
consists in parting the two plates, the top plate and the bottom
plate, from one another by applying a second force to them until
the partition walls between the openings form an angle
approximately equal to ninety degrees with the two plates, the top
plate and the bottom plate.
12. Method according to claim 1, characterized in that said method
includes a sixth step (F) that consists in producing a plurality of
interconnecting banks and in enclosing the plurality of banks in a
housing that includes the walls that seal partially at least one of
the sides of said banks, entries and exits for each bank of fluid
flow also being defined in the walls of the housing.
13. Method according to claim 12, characterized in that the inset
plates are arranged one in relation to another such that when the
bottom and top plates delimiting two consecutive banks are parted
from each other, the partition walls between the openings of one
bank are respectively situated in the same plane as the partition
walls between the openings of the other bank.
14. Heat exchanger, characterized in that said heat exchanger is
produced according to the method in accordance with at least claim
1.
15. Method according to claim 2, characterized in that said method
consists in using plates that are approximately between thirty and
a thousand microns thick.
16. Method according to claim 2, characterized in that the binding
means operate in accordance with at least one of the following
functions: bonding, brazing, welding.
17. Method according to claim 3, characterized in that the binding
means operate in accordance with at least one of the following
functions: bonding, brazing, welding.
18. Method according to claim 2, characterized in that said method
consists in applying said binding means by at least one of the two
following techniques, seriography and micro projection, on at least
one of the following elements: the top and bottom faces of the
lanes, the bottom face of the top plate and the top face of the
bottom plate.
19. Method according to claim 3, characterized in that said method
consists in applying said binding means by at least one of the two
following techniques, seriography and micro projection, on at least
one of the following elements: the top and bottom faces of the
lanes, the bottom face of the top plate and the top face of the
bottom plate.
20. Method according to claim 4, characterized in that said method
consists in applying said binding means by at least one of the two
following techniques, seriography and micro projection, on at least
one of the following elements: the top and bottom faces of the
lanes, the bottom face of the top plate and the top face of the
bottom plate.
Description
[0001] The present invention relates to methods for producing a
heat exchanger and also to heat exchangers produced according to
said methods, emphasizing that said heat exchangers can be used in
a particularly advantageous manner within the field of heat
exchangers that use gaseous liquids, such as air or similar.
[0002] Heat exchangers exist that comprise a plurality of
interconnecting banks each defining a fluid flow, each bank
comprising at least two solid plates produced in an impervious
material and kept at a spacing from one another by different types
of spacing means.
[0003] However, the known exchangers of this type are relatively
expensive and do not perform overly well, which has meant that they
have not been able to reach a wider audience and be used in all
types of technical areas, for example in the ventilation of
residential buildings and/or industrial buildings and/or commercial
buildings for the recovery of heat-energy conveyed, for example,
using equipment known by the initials VMC.
[0004] For example, U.S. Pat. No. 5,287,918 is known, relating to a
compact "fin-plate" heat exchanger and to a method for producing
such an exchanger. The exchanger comprises, for example, three flat
metal sheets, for example made in titanium, stacked one above the
other, interconnected in a partial manner by means of an adhesive
so as to allow the two outer sheets to be moved apart when a
pressurized gas is introduced between the sheets. The intermediate
sheet is produced in a super-plastic material which meets a precise
technical definition that can be summed up by a material with a
large plastic deformation phase at high temperature allowing for
large elongation at break. Once the outside sheets have been moved
apart, the intermediate sheet is deformed so as to define two
liquid flow channels on both sides of said intermediate sheet, and
between the two outside sheets of the stack, respectively.
[0005] US 2006/0070728 is also known and relates to a heat
exchanger intended for a ventilation system for a structure so as
to optimise the replacement of the inside air by the outside air.
This document notably describes a conventional exchanger which
includes a plurality of thin flat laminated plates between which
are disposed respectively smooth pleated plates. The outside air
passes between the pleats formed by a pleated plate between two
flat plates, forming a bank of air flow, whilst the inside air
passes between the pleats formed by the adjacent pleated plate of a
similar adjacent bank. Two adjacent banks form two air flows, the
inside flow and the outside flow respectively, in accordance with
two senses of direction at 90.degree.. The invention according to
this document consists in replacing the smooth pleated plates by
drilled pleated plated so as to increase the air turbulence when it
flows through the exchanger, and thus to improve the output of this
latter. In addition, the pleats can advantageously be disposed
offset with regard to the direction of the air flow. The sheets of
the exchanger can be produced in aluminium or paper and the
intermediate drilled sheets can be produced in a porous resin
film.
[0006] It is also an object of the present invention to implement a
method for producing a heat exchanger which, at least to a great
extent, alleviates the disadvantages referred to above of heat
exchangers of the prior art.
[0007] More particularly, it is the object of the present invention
to implement a method for producing a heat exchanger that weighs
less than exchangers of the prior art, with reduced pressure loss
in the fluid flows and costing less to produce, whilst at the same
time improving heat exchanges between the banks, throwing off the
dimensional restrictions imposed by the prior art and increasing
resistance to pressure differences between the banks of fluid
flow.
[0008] More precisely, the object of the present invention is a
method for producing a heat exchanger comprising a plurality of
interconnecting banks each defining a fluid flow, each bank
comprising two solid plates, respectively the top plate and the
bottom plate produced in an impervious material, and spacing means
to keep the two solid plates at a spacing one from the other,
characterized in that the production of at least one of the said
banks includes the following steps:
[0009] (A) producing an insert plate comprising: [0010] a plurality
of strips, [0011] bridges of weakness interconnecting said strips
such that they are parallel to each other, said bridges of weakness
being capable of breaking under tension, and [0012] a plurality of
openings produced in each strip such that said openings, along the
two longitudinal edges of each strip, delimit two continuous lanes,
respectively the left lane and the right lane, the openings being
separated from each other by partition walls that connect the two
lanes, each lane having a top face and a bottom face, [0013] (B)
interposing said insert plate between the two solid impervious
plates, i.e. the top and bottom plate, [0014] (C) interposing
binding means between, on the one hand, the top face of each left
lane of all the strips and the bottom face of the top plate, and,
on the other hand, the bottom face of each right lane of all the
strips and the top face of the bottom plate, [0015] (D) applying a
first force to bring the two plates, the top and bottom plate, into
contact with the insert plate, such that all the top faces of the
left lanes adhere to the bottom face of the top plate and all the
bottom faces of the right lanes adhere to the top face of the
bottom plate, and [0016] (E) applying a second force to part the
two plates, i.e. the top and bottom plate one from the other in
such a manner that the bridges of weakness are broken and until the
partition walls between the openings form a non zero angle with the
two plates, the top and bottom plates.
[0017] The object of the present invention is also a heat exchanger
obtained with the method defined above.
[0018] Other characteristics and advantages of the invention will
appear during the following description given with respect to the
drawings provided for illustrative purposes only but being in no
way restrictive, in which:
[0019] FIGS. 1 and 2 represent two schematic views, a side view and
top view respectively of an embodiment of the heat exchanger
according to the invention, and
[0020] FIGS. 3 to 5 represent respectively three steps of the
implementation of the method according to the invention for
producing a heat exchanger according to the invention in accordance
with FIGS. 1 and 2.
[0021] First of all it must be stated that in the Figures the same
references designate the same elements, whatever the Figure on
which they appear and whatever form of representation these
elements may take. In the same way, if elements are not referenced
specifically on one of the Figures, their references can be easily
found by looking at another Figure.
[0022] It must also be stated that these Figures represent
essentially one single embodiment of the object according to the
invention, but there may be other embodiments that meet the
definition of this invention.
[0023] It must also be stated that when, according to the
definition of the invention, the object of the invention includes
"at least one" element with a given function, the embodiment
described can comprise a plurality of said elements. Reciprocally,
if the embodiment of the object according to the invention such as
is illustrated comprises a plurality of elements with an identical
function and if, in the description, it is not specified that the
object according to this invention must, in an obligatory manner,
comprise a specific number of said elements, the object of the
invention can be defined as comprising "at least one" of said
elements.
[0024] Finally it must be stated that when, in the present
description, one expression on its own, with no specific particular
mention concerning it, defines a set of structural characteristics,
these characteristics can be taken, for the definition of the
object of the protection requested, when this is technically
possible, either separately or in total and/or partial
combination.
[0025] First of all it must be pointed out again, by referring to
FIGS. 1 and 2, that a heat exchanger 1 according to the invention
comprises a plurality of interconnecting banks 2, 3, 4, each bank
defining a fluid flow 5, 6 and comprising two solid plates,
respectively the top plate 11 and bottom plate 12 produced in an
impervious material, and spacing means 14 to keep the two solid
plates at a spacing one from another. These spacing means 14 also
allow the flow of the fluid 5, 6 to be divided with the aim of
contributing better to the heat exchanges via the top and bottom
plates 11, 12 between the two fluids flowing in two consecutive
banks. As is shown in FIG. 2, the fluid flows 5, 6 between two
juxtaposed banks are advantageously counter-current so as to
participate in the improvement in the heat exchange output between
the two banks.
[0026] The method according to the invention is characterized
essentially in that the production of at least one of the banks 2,
3, 4 includes the five steps A to E defined below.
[0027] The first step A, more particularly with reference to FIG.
3, consists in producing an insert plate 20 that comprises a
plurality of strips 21, 22, 23, bridges of weakness 35, 36, 37 that
connect said strips 21, 22, 23 such that they are parallel to one
another, it being noted that said bridges of weakness are capable
of breaking under tension, and a plurality of openings 25, 26, 27
that are produced in each strip such that, along the two
longitudinal edges of the strip, they delimit two continuous lanes
31, 32 as represented, or discontinuous lanes (not represented),
respectively the left lane and the right lane; the openings 25, 26,
27 being separated from each other by partition walls 28, 29 that
connect the two lanes, each lane having a top face 33, 33-1 and a
bottom face 34, 34-1.
[0028] It must be noted that the insert plate 20 can be in the form
of a draughtboard (not represented), the squares of one of the
colours of the draughtboard would in fact be the openings and the
squares of the other colour on the draughtboard would be produced
from material, these latter being connected by corners constituting
in this way notably the bridges of weakness described above. Thus,
each of the strips 21, 22, 23 described above would be constituted
on their respective edges by two alignments of discontinuous
squares, defining the two lanes 31, 32 along the two longitudinal
edges of the strip, these two discontinuous lanes 31, 32 being
interconnected by an alignment of offset discontinuous squares
defining the partition walls 28, 29 described above and therefore
connecting the two lanes. According to this alternative embodiment,
the two lanes 31, 32 and the partition walls 28, 29, forming a
determined strip, and the two similar adjacent strips on both sides
of the same, would be connected by the corners of the squares of
the draughtboard constituted by material, and forming the bridges
of weakness.
[0029] These bridges of weakness can be constituted in different
ways, for example by tabs connecting the strips as illustrated in
the Figures, or by one single continuous tab between two strips
that can be obtained by producing a groove or a furrow in the
intermediate plate 20, or also by joints in the material between
two corners of two squares of a draughtboard as described
above.
[0030] The second step B consists in interposing the insert plate
20, which has the characteristics defined above and is obtained
during step A, between the two solid impervious plates, the top
plate and the bottom plate, as illustrated in FIG. 4.
[0031] A third step C consists in interposing the binding means 41,
42 between, on the one hand, the top face 33 of each left lane 31
of all the strips 21, 22, 23 and the bottom face 1-11 of the top
plate 11, and, on the other hand, the bottom face 34-1 of each
right lane 32 of all the strips 21, 22, 23 and the top face 1-12 of
the bottom plate 12.
[0032] However, it is stipulated that said third step C can be
executed before of after the first step A or after the second step
B defined above, although, according to an advantageous
characteristic of the method given below, this third step C is
preferably executed before the first step A or before the second
step B.
[0033] In FIG. 4, the binding means 41, 42 are represented
pre-positioned on the faces 33 and 34-1 respectively of the lanes
31, 32, but it is certainly clear that they can also be
pre-positioned directly on the bottom face 1-11 and top face 1-12
respectively of the two plates 11, 12 in the locations where the
top and bottom faces of the lanes come into contact with the bottom
and top faces of the two plates, as explained below during the
description of the following steps in the implementation of the
method according to the invention.
[0034] As for the fourth step D, it consists in applying a first
force, indicated in FIG. 4 by the arrows F, to bring the two
plates, the top 11 plate and the bottom 12 plate, into contact with
the insert plate 20 such that all the top faces 33 of the left
lanes 31 adhere fixedly 41 to the bottom face 1-11 of the top plate
11 and all the bottom faces 34-1 of the right lanes 32 adhere
fixedly 42 to the top face 1-12 of the bottom plate 12.
[0035] According to the nature of the binding means 41, 42, the
stack of three plates may be submitted to adapted heating.
[0036] The fifth step E of the method is executed when the
adherence between the lanes 31, 32 and the plates 11, 12 has been
completely obtained. It consists, with reference to the schematic
FIG. 5, by applying a second force (in effect a force in the
opposite direction to the first force defined above and indicated
by the arrows F in FIG. 4) to part the two plates, the top plate 11
and the bottom plate 12, one from the other in such a manner that
the bridges of weakness 36, 37, 38 are broken and until, by
folding, the partition walls 28, 29 between the openings 25, 26, 27
form an non zero angle with the two plates, the top plate and the
bottom plate 11, 12.
[0037] In a preferred manner, to obtain a rigid heat exchanger that
is not, for example, capable of vibrating and/or deforming notably
by swelling when put into operation in the fluid flow, the method
consists in parting the top plate and the bottom plate 11, 12 one
from the other by applying a second force to them, until the
partition walls 28, 29 between the openings form an angle
approximately equal to ninety degrees with the two plates, the top
plate and the bottom plate 11, 12.
[0038] At the end of executing the fifth step E, the heat exchanger
is provided as schematically illustrated in the side view
represented in FIG. 5, in which are visible the broken bridges of
weakness 35, 36, 37, the spacing means 14 separated by the width of
the openings 25, 26, 27 and which are provided approximately in the
form of a "Z" with their two horizontal bars at right angles to
their vertical bar, the horizontal bars corresponding to the two
lanes 31, 32 and the vertical linking bars corresponding to the
partition walls 28, 29 of the openings 25, 26, 27.
[0039] It must be noted that the two fold lines of the Z-shaped
strips are obtained on the two imaginary lines 101, 102 represented
by the broken lines that go through the two edges 51, 52 of the
openings that delimit the left and right lanes 31, 32. These folds
are promoted by the very existence of the openings and the small
width and thickness of the partition walls 28, 29 between said
openings. In fact, these two fold lines are made automatically when
the second force is applied.
[0040] According to a preferred characteristic of the method, the
openings 25, 26, 27 in each strip 21, 22, 23 are produced such that
their edges 51, 52 referred to above are co-linear 102, 102 and
parallel to the longitudinal axis of the lanes, with the aim of
making folding into a Z-shape as defined above easier to
accomplish.
[0041] The counter-current fluid flow between two juxtaposed banks
is advantageously established in the direction of the two imaginary
lines 101, 102 corresponding to the two fold lines of the Z-shaped
strips, and between the adjusted strips 21, 22, 23. The width of
the openings 25, 26, 27 of each strip 21, 22, 23 allows the flow of
a fluid 5, 6 to be controlled such that it is rather channeled
between the strips 21, 22, 23 of one bank when this width is small,
or can also be distributed across the openings 25, 26, 27 of each
strip 21, 22, 23, in a diverging manner, then a converging manner,
between the entry 5.sub.en, 6.sub.en and the exit 5.sub.ex,
6.sub.ex of the fluid for each bank considered.
[0042] As represented in FIG. 2, the counter-current character of
the relative flow of the two fluids 5, 6 of two adjacent banks, is
obtained, in co-operation with the guiding of the fluid flow
between the strips 21, 22, 23, by the symmetrical entries and exits
between the two banks, with respect to a plane at right angles to
the strips 21, 22, 23 and to the plane of the bank: for example, in
FIG. 2, the entry 5.sub.en of the fluid into a bank 3 is at the
bottom right-hand side of the surface of the bank 3 and the exit
5.sub.ex at the top left-hand side of the surface of the bank; and
the entry 6.sub.en of the fluid into an adjacent bank 2 is at the
top right-hand side of the bank 2 and the exit 6.sub.ex is at the
bottom left-hand side of the bank 2 (the positional references are
given with respect to the view in FIG. 2).
[0043] It must be noted that, in a known manner, the
counter-current character of the flow of the fluids between two
adjacent banks, will be all the more efficient given that, with
respect to FIG. 2, the distance between the entries 6.sub.en and
5.sub.en or between the exits 6.sub.ex and 5.sub.ex will be large
in relation to the distance between the entry 5.sub.en and the exit
6.sub.ex or between the entry 6.sub.en and the exit 5.sub.ex such
that the length of the channels of fluid flow defined between the
spacing means 14 is large in relation to the width of the bank
defined by the juxtaposition of these flow channels, forming the
width of the sides of the bank corresponding to the walls 70-3 or
70-4 of the housing 70.
[0044] The method according to the invention is particularly
interesting in terms of the goals to be obtained defined in the
preamble of the present description, i.e. notably to obtain an
exchanger that allows for very good heat exchanges whilst at the
same time not being too expensive to produce and or being too
heavy, as it is possible to use plates 11, 12, 20 that are
approximately between thirty and a thousand microns thick, produced
in materials such as aluminium, copper, aluminium-base alloys or
copper-base alloys, or any other material that is a good heat
conductor.
[0045] As for the binding means 41, 42, they can be of different
types. However, they will preferably be selected from those that
operate in accordance with at least one of the following functions:
bonding, brazing, welding.
[0046] In addition, still with the aim of obtaining the lowest
possible production cost, said binding means 41, 42 shall be
selected from those that can be applied by seriography or by micro
projection, for example flat, on at least one of the following
elements: the top and bottom faces of the lanes 33, 34-1, the
bottom face 1-11 of the top plate and the top face 1-12 of the
bottom plate 12; it is well known that said application techniques
can easily be applied in an automated manner.
[0047] With the same objective, the production of the openings 25,
26 27 can be effected according to at least one of the following
techniques: micro cutting, stamping, laser cutting, pressurized
water jet spray which can easily be automated, chemical milling or
electrochemical milling.
[0048] It has been mentioned, and can be seen in FIG. 3, that it is
possible to leave a middle zone 60 without any openings on at least
one of the two lateral strips 21 of the insert plate 20 with the
aim, for example, of sealing at least partially at the side, the
bank produced with such an insert plate 20 between the two plates
11, 12.
[0049] This middle zone 60 without any openings, in spite of
everything, can be edged at each of its ends by at least one
opening 25-26 to constitute the entry and the exit of the bank,
FIG. 2.
[0050] It is also possible for at least one of the two lateral
strips 21 not to have an openings, this allows, for example, a flow
bank totally sealed on one side and partially on the other to be
obtained, the entry and exit being on the same side in this
embodiment.
[0051] Although, on FIG. 3, the openings are all the same length,
it is possible to produce the openings 25, 26, 27 with different
lengths, and even to start producing the openings from a very edge
of the insert plate 20, as illustrated in FIG. 3 with the opening
1-25, with the aim, for example, of coping with distribution buffer
volumes of the fluid until it flows into the part of the bank
comprising the spacing means 14.
[0052] To facilitate bending the strips 21, 22, 23 into a Z-shape
as defined above, the method consists in producing the openings
25-26 with one of the following forms: rectangular, square,
triangular, trapezoidal, round, oval.
[0053] To avoid the appearance of tears in the intermediate plate
20 when adjusting the partition walls 28, 29, it is advantageous to
produce the openings 25, 26, 27 with the edges not having any sharp
rims following a direction at right angles to the plane of the
intermediate plate 20. In the case, for example, of the possible
forms mentioned above, it is advantageous for the openings to have
rounded corners.
[0054] A method of implementing the method according to the
invention has been described above to produce one of the banks of
the heat exchanger according to the invention, but it is very clear
that all the banks of a same exchanger can be produced in the same
way, and at the same time, emphasizing that one of the two solid
plates delimiting one bank is used as one of the two solid plates
for the consecutive bank, and so on.
[0055] In this case, all the banks 2, 3, 4 will be produced at
once. Such an embodiment is in the field of expertise of the expert
who, having become familiar with the description given above, will
know how to implement the method to produce an exchanger according
to the invention with a plurality of banks. The implementation of
the method to produce an exchanger according to the invention with
a plurality of banks will therefore not be described in any more
detail here purely with the aim of trying to simplify the present
description.
[0056] In this case, however, as is illustrated schematically in
FIG. 1 and is more visible in FIG. 5, the method according to the
invention shall consist in an advantageous manner in producing the
insert plates 20 and in fitting them one relative to the other
between the bottom plate and the top plate 11, 12 such that, when
the top and bottom plates 11, 12 delimiting at least two
consecutive banks are parted one from the other, the partition
walls 28, 29 between the openings 25, 26, 27 of one bank are
respectively situated in the same plane as the partition walls 28,
29 between the openings 25, 26, 27 of the other bank.
[0057] It is of course the same for all the insert plates 20. That
is to say all the partition walls 28, 29 between the openings 25,
26, 27 of one bank will be respectively situated in the same plane
as all the partition walls 28, 29 of all the other banks.
[0058] The exchanger 1, obtained in this manner, will be more
resistant to pressure both outside and inside, with the partition
walls 28, 29 one above the other aligned forming the individual
spacer units for all the banks. These individual spacer units
prevent, for example, the top and bottom plates 11, 12 from
deforming at the ends of the partition walls 28, 29, which could
occur if they were, for example, offset staggered in rows.
[0059] This advantageous configuration with a plurality of banks is
illustrated schematically in FIGS. 1 and 5.
[0060] However, in an advantageous manner, the method can comprise
a supplementary sixth step F which consists, after producing a
plurality of interconnecting banks, in enclosing this plurality of
banks 2, 3, 4 in a housing 70, FIGS. 1 and 2, that includes the
partition walls 70-1, 70-2, 70-3, 70-4 that partially seal at least
one of the sides of the banks, the entries and exits 5.sub.en,
6.sub.en, 5.sub.ex 6.sub.ex for each bank 2, 3, 4 of fluid flow 5,
6 also being defined in the wall of the housing.
[0061] For reasons, for example, of integration in more complex
systems, certain ends of the banks can be sealed by fixed or
detachable plugs so as to facilitate cleaning of the same.
[0062] The present invention also relates to a heat exchanger 1
produced according to the method described above.
[0063] In the above description, it emerges that the method
according to the invention for producing a heat exchanger is very
economical as, apart from the fact that it can be implemented with
little material, nearly all of the stages of the different steps
can be easily automated, for example by using robots with grippers
(no-load suction cups) notably to handle the plates 11, 12, 20,
cutting robots and robots for applying the binding means 41, 42,
functioning according to the techniques mentioned throughout the
present description explaining the different steps of the
implementation of the method according to the invention.
[0064] Finally, it must be stated and emphasized that, in terms of
the present description, the adjectives "top" and "bottom", "right"
and "left" are only used to facilitate differentiation, purely with
respect to the plane of the Figures, of the positions of the two
solid plates 11, 12 one with respect to the other, the respective
positions of the lanes 21, 32 of a same strip, and the respective
faces of the lanes. In no way, for example, must the adjectives
"top" and "bottom" be understood purely as defining a position of
the horizontal plates 11, 12 at the respective levels in accordance
with a vertical. These plates 11, 12 can be positioned according to
any direction whatsoever with respect to the ground.
[0065] Translation on FIG. 2 [0066] 5.sub.so has been translated as
5.sub.ex [0067] 6.sub.so has been translated as 6.sub.ex
* * * * *