EP1132706A2 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- EP1132706A2 EP1132706A2 EP01105273A EP01105273A EP1132706A2 EP 1132706 A2 EP1132706 A2 EP 1132706A2 EP 01105273 A EP01105273 A EP 01105273A EP 01105273 A EP01105273 A EP 01105273A EP 1132706 A2 EP1132706 A2 EP 1132706A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- headers
- exchange tubes
- heat exchanger
- portions
- 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.)
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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
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
- F28D1/0316—Assemblies of conduits in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
- F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A heat exchanger comprises: a pair of headers (10, 10) which are provided in parallel
facing each other through a predetermined distance and a pathway of the fluid is respectively
provided therein; and a plurality of flat heat-exchange tubes (20,20...) which are provided
between the headers in parallel, both ends thereof are fastened to the headers, and a pathway of
the refrigerant for connecting the pathways of both headers is respectively provided therein. In
this heat exchanger, the heat-exchange tubes and the headers are air-tightly and liquid-tightly
fastened by inserting end portions (21,21...) of the heat-exchange tubes into insertion holes
(11,11...) which are bored on the headers. Furthermore, in the vicinity of opening ends (29)
of both end portions of the flat heat-exchange tubes, shape-holding portions (41) for preventing
deformation of the opening ends are provided.
Description
The present invention relates to a heat exchanger which is suitable for used as a heat
exchanger of a refrigerant and constitutes a condenser and an evaporator of an air conditioner.
In a cooling apparatus such as an air conditioner, a refrigerant (fluid) which has been
transformed into a compressed gas having high temperature and pressure, is liquefied in a
condenser, and the liquefied refrigerant is vaporized by removing heat of evaporation in an
evaporator. A heat exchanger which equips a plurality of heat-exchange tubes for flowing the
refrigerant in the inside thereof is used in the condenser and evaporator. In this heat exchanger,
the refrigerant which flows through the heat-exchange tubes radiates or absorbs heat through
the walls of the heat-exchange tubes.
Conventionally, the heat exchanger as shown in Figs. 23 to 26 is known as this type of
heat exchanger. The heat exchanger comprises: a pair of headers 10, 10 which are provided in
parallel facing each other through a predetermined distance, and a pathway of the refrigerant
(fluid) is respectively provided therein; a plurality of flat heat- exchange tubes 20, 20... which
are provided in parallel between the headers 10, 10, and both ends thereof are fastened to the
headers 10, 10 and a pathway of the refrigerant for connecting the pathways of both headers 10,
10 is respectively provided therein; and a plurality of fins 30, 30... which are provided between
the adjacent heat- exchange tubes 20, 20... to contact the outer surfaces of the heat- exchange
tubes 20, 20... which face each other. Furthermore, an inlet 13 of the refrigerant is provided on
one end of one of the headers 10, and an outlet 14 of the refrigerant which is approximately
located at the farthest position from the inlet 13 on a diagonal line toward the inlet 13, is
provided on the other header 10.
In addition, connecting structures between the headers 10, 10 and the heat- exchange
tubes 20, 20... are provided by inserting end portions 21, 21... of the heat- exchange tubes 20,
20... into insertion holes 11, 11... which are bored on the headers 10, 10, and air-tightly and
liquid-tightly fastening the headers 10, 10 and the heat- exchange tubes 20, 20....
Each heat-exchange tube 20 is constructed by bending a belt shaped metal plate 22 in
which solder is clad on both surfaces thereof at a folding portion 23 provided along the
longitudinal direction of the metal plate 22, and by forming a passage for the refrigerant
between wall portions 24, 25 which are located on one and the other sides of the bent metal
plate 22 by attaching connecting end portions 26, 26 which are formed at the ends of the wall
portions 24, 25 along the longitudinal direction of the bent metal plate 22. Here, in the heat-exchange
tube 20, to reduce the length of the time of heat transmission, the radius of curvature
of the folding portion 23 is smaller than the widths of the wall portions 24, 25, and therefore,
the heat-exchange tube 20 forms a flat shape in which the distance between the wall portions
24, 25 is shortened to the widths thereof.
Furthermore, to stir the refrigerant which flows in the heat- exchange tubes 20, 20... in
order to unify the temperature of the refrigerant, a plurality of bulging members 28, 28...
project from the wall portions 24, 25 toward the opposing wall portions. Each of these bulging
members 28, 28... has a truncated-cone shape, and a flat connecting portion 28a is provided on
the connecting end thereof. The connecting portions 28a, 28a... of the opposing bulging
members 28, 28... contact each other.
In addition, a notch 16 is provided on the connecting end portions 26, 26 of each end
portion 21 so as to unify the inserted length of the end portion 21 by attaching the notch 16 to
the edge of the insertion hole 11 when the end portion 21 is inserted into the insertion hole 11.
The heat exchanger is assembled by the following steps: producing the heat- exchange
tubes 20, 20... by forming a metal tube by press molding or roll molding and cutting both ends
of the metal tube; inserting the end portions 21, 21... of the heat- exchange tubes 20, 20... into
the insertion holes 11, 11... of the headers 10, 10...; providing fins 30, 30... between the
adjacent heat- exchange tubes 20, 20... by contacting the fins 30, 30... to both of the opposing
outer surfaces of the adjacent heat- exchange tubes 20, 20... in order to prevent the separation
of the connecting end portions 26, 26 of each heat-exchange tube 20 by a spring-back force,
and retaining these heat- exchange tubes 20, 20... and the fins 30, 30... which form multilayers,
by sandwiching them between a pair of holding plates 15, 15 from the outside.
The heat exchanger is temporarily assembled by using jigs, and braze-welded by
heating in a furnace. That is, joints between the insertion holes 11, 11... and the heat- exchange
tubes 20, 20... , and a joint between the opposing connecting end portions 26, 26 are
each air-tightly and liquid-tightly fastened by braze-welding. Furthermore, the connecting
portions 28a, 28a... of the opposing bulging members 28, 28... are also fastened by braze-welding.
In the above-mentioned conventional heat exchanger, the refrigerant flows into a header
10 from the inlet 13, branches off and passes through each heat-exchange tube 20, flows into
the opposite header 10, and flows out from the outlet 14. The refrigerant exchanges heat
toward an outer part through the wall surfaces of the heat- exchange tubes 20, 20....
Furthermore, the heat- exchange tubes 20, 20... in which the high pressure refrigerant
flows, have a structure for improving the resistance against the pressure force which is exerted
on the wall portions 24, 25 of the flat heat- exchange tubes 20, 20.... That is, the wall portions
24, 25 which are positioned on the top and bottom facing each other, are connected by welding
the connecting portions 28a, 28a... of the opposing bulging members 28, 28... which are used
to stir the refrigerant.
However, the above-mentioned conventional heat exchanger has the following
problems.
No bulging members are provided around the opening ends which provide the
inlet/outlet portion for the refrigerant at both ends of the heat- exchange tubes 20, 20..., in
order to prevent problems such as pressure losses of the refrigerant caused by sudden
expansion/contraction of the refrigerant. However, when forming the opening ends by cutting
both ends of the roll-molded heat-exchange tube, the formed opening ends tend to be easily
deformed along the cutting direction of the tube because the bulging members which support
the opposing wall portions are not provided. The opening ends, which have deformations such
as bending or twisting, are difficult to insert into the insertion holes of the header. Moreover,
even if corrections of the deformations are performed, the deformations still remain in the end
portions of the tube which is easily deformed since the bulging members are not provided.
Therefore, there are problems in that spaces arise between the end portions and the insertion
holes, and sufficient braze-welding cannot be performed.
In addition, in the heat-exchange tube formed by bending a metal plate, a force, which
deforms the tube along the opening direction of the tube and which separates the upper and
lower wall portions which face each other, is produced by a spring back force. The
deformation is hindered by the fins which are provided between the adjacent tubes and which
hold the tubes from the outside along almost the entire portion of the heat exchanger.
However, in the vicinity of the end portions of the heat-exchange tube, since the fins cannot be
provided by constructive restriction, there are problems that spaces arise between the opposing
connecting portions or bulging members due to separation of the opposing wall portions
because the end portions are not supported by the fins, and sufficient braze-welding cannot be
performed.
As described above, in the conventional heat exchanger, there are problems in that the
sealing performance and resistance against the pressure of the heat exchanger are degraded due
to insufficient braze-welding. The present invention is achieved in consideration of the above
circumstances, and an object thereof is to provide a heat exchanger in which braze-welding can
be performed more properly and which possesses superior sealing performance and resistance
against the pressure.
A first aspect of the heat exchanger of the present invention comprises: a pair of
headers which are provided in parallel facing each other through a predetermined distance and
a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes
which are provided between the headers in parallel, both ends thereof are fastened to the
headers and a pathway of the refrigerant for connecting the pathways of both headers is
respectively provided therein; wherein connecting structures between the headers and the heat-exchange
tubes are provided by inserting the end portions of the heat-exchange tubes into
insertion holes which are bored on the header, and air-tightly and liquid-tightly fastening the
header and the heat-exchange tubes; and shape-holding portions for preventing the deformation
of the opening ends of the heat-exchange tube which are provided in the vicinity of the opening
ends of each heat-exchange tube.
In the heat exchanger, it is preferable that the shape-holding portions are provided by
reinforcement members which project from at least one of the opposing wall portions of the
heat-exchange tube toward the other opposing wall portion, and the connecting ends of the
opposing reinforcement members contact each other.
A second aspect of the heat exchanger of the present invention comprises: a pair of
headers which are provided in parallel facing each other through a predetermined distance and
a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes
which are provided between the headers in parallel, both ends thereof are fastened to the
headers, and a pathway of the refrigerant for connecting the pathways of both headers is
respectively provided therein, wherein connecting structures between the headers and the heat-exchange
tubes are provided by inserting end portions of the heat-exchange tubes into insertion
holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and
the heat-exchange tubes; and an insertion end portion, in which the width thereof between
opposing side walls of the heat-exchange tube becomes narrower as it approaches an opening
end of the heat-exchange tube, which is provided on each end portion of the heat-exchange
tubes.
In the heat exchanger, it is preferable that each insertion hole has a shape corresponding
to the shape of the insertion end portion.
It is further preferable that the insertion end portion has a contacting portion which is
inwardly or outwardly projecting from the outer surface thereof, and each insertion hole has a
shape corresponding to the shape of the insertion end portion in which the contacting portion is
provided.
A third aspect of the heat exchanger of the present invention comprises: a pair of
headers which are provided in parallel facing each other through a predetermined distance, and
a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes
which are provided between the headers in parallel, both ends thereof are fastened to the
headers, and a pathway of the refrigerant for connecting the pathways of both headers is
respectively provided therein, wherein connecting structures between the headers and the heat-exchange
tubes are provided by inserting end portions of the heat-exchange tubes into insertion
holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and
the heat-exchange tubes; and a comer of an opening end of each heat-exchange tube which is
partly cut off.
A fourth aspect of the heat exchanger of the present invention comprises: a pair of
headers which are provided in parallel to facing each other through a predetermined distance,
and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange
tubes which are provided between the headers in parallel, both ends thereof are fastened to the
headers and a pathway of the refrigerant for connecting the pathways of both headers is
respectively provided therein, wherein connecting structures between the headers and the heat-exchange
tubes are provided by inserting end portions of the heat-exchange tubes into insertion
holes which are bored on the header, and air-tightly and liquid-tightly fastening the header and
the heat-exchange tubes; and a removal prevention member which is fastened to opposing wall
portions of each heat-exchange tube for preventing the deformation of the heat-exchange tube
caused by removal of the wall portions, and which is provided on at least one of the wall
portions.
In the heat exchanger, it is preferable that the removal prevention member is provided
by bulging members which project from respective wall portions toward the opposing wall
portions, and the connecting ends of the opposing bulging members contact each other and are
welded by laser.
In the heat exchanger, it is also preferable that the removal prevention member is
provided with projections which project from respective wall portions toward the opposing
wall portions, a hole which is provided on one of the projections, a pipe member which is
provided on the other projection and passes through the hole, and a caulked portion which is
provided on the ends of the projections for fastening the projections by being turning
downward and caulking the end of the pipe member.
In the heat exchanger, it is also preferable that the removal prevention member is
provided by extending a part of one of the opposing wall portions from each opening end of the
heat-exchange tubes and bending toward the other wall portion so as to be fastened to the other
wall portion.
Fig. 1 is an enlarged cross-sectional view of the main part of the heat exchanger
according to the first embodiment of the present invention.
Fig. 2 is an enlarged perspective view of the main part of the heat-exchange tube
according to the first embodiment of the present invention.
Fig. 3 is an enlarged perspective view of the main part of the heat-exchange tube
according to the second embodiment of the present invention.
Fig. 4 is an enlarged front view of the main part of the header which has an insertion
hole according to the second embodiment of the present invention.
Fig. 5 is an enlarged perspective view of the main part of a variation of the heat-exchange
tube according to the second embodiment of the present invention.
Fig. 6 is an enlarged front view of the main part of a variation of the header which has
an insertion hole according to the second embodiment of the present invention.
Fig. 7 is an enlarged perspective view of the main part of another variation of the heat-exchange
tube according to the second embodiment of the present invention.
Fig. 8 is an enlarged front view of the main part of another variation of the header
which has an insertion hole according to the second embodiment of the present invention.
Fig. 9 is an enlarged perspective view of the main part of another variation of the heat-exchange
tube according to the second embodiment of the present invention.
Fig. 10 is an enlarged front view of the main part of another variation of the header
which has an insertion hole according to the second embodiment of the present invention.
Fig. 1 is an enlarged cross-sectional view of the main part of another variation of the
heat exchanger according to the second embodiment of the present invention.
Fig. 12 is an enlarged perspective view of the main part of another variation of the heat-exchange
tube according to the second embodiment of the present invention.
Fig. 13 is an enlarged front view of the main part of another variation of the header
which has an insertion hole according to the second embodiment of the present invention.
Fig. 14 is an enlarged cross-sectional view of the main part of another variation of the
heat exchanger according to the second embodiment of the present invention.
Fig. 15 is an enlarged perspective view of the main part of the heat-exchange tube
according to the third embodiment of the present invention.
Fig. 16 is an enlarged plan view of the main part of the heat exchanger according to the
third embodiment of the present invention.
Fig. 17 is an enlarged perspective view of the main part of the heat-exchange tube
according to the fourth embodiment of the present invention.
Fig. 18 is an enlarged cross-sectional view of the main part of the heat exchanger
according to the fourth embodiment of the present invention.
Fig. 19 is an enlarged perspective view of the main part of the heat-exchange tube
according to the fifth embodiment of the present invention.
Fig. 20 is an enlarged cross-sectional view of the main part of the heat exchanger
according to the fifth embodiment of the present invention.
Fig. 21 is an enlarged perspective view of the main part of the heat-exchange tube
according to the sixth embodiment of the present invention.
Fig. 22 is an enlarged cross-sectional view of the main part of the heat exchanger
according to the sixth embodiment of the present invention.
Fig. 23 is a front view of a conventional heat exchanger.
Fig. 24 is an enlarged perspective view of the main part of the heat exchanger shown in
Fig. 23.
Fig. 25 is an enlarged plan view of the main part of the heat exchanger shown in Fig.
23.
Fig. 26 is a cross-sectional view along the line A-A shown in Fig. 25.
The preferred embodiments of the present invention will be explained in the following
with reference to the figures.
Figs. 1 and 2 show a first embodiment of the heat exchanger of the present invention.
A heat exchanger denoted by the symbol "A" has a similar structure to the conventional heat
exchanger, which is disclosed in Fig. 23, and comprises: a pair of headers 10, 10 which are
provided in parallel facing each other through a predetermined distance, and a pathway of the
refrigerant (fluid) is respectively provided therein; a plurality of flat heat- exchange tubes 20,
20... which are provided in parallel between the headers 10, 10, both ends thereof are fastened
to the headers 10, 10 and a pathway of the refrigerant for connecting the pathways of both
headers is respectively provided therein; and a plurality of fins 30, 30... which are provided
between the adjacent heat- exchange tubes 20, 20... to contact the outer surfaces of the heat- exchange
tubes 20, 20... which face each other.
In the connecting structure between the headers 10, 10 and the heat- exchange tubes 20,
20..., end portions 21, 21... of the heat- exchange tubes 20, 20... are inserted into insertion
holes 11, 11... which are bored on the header 10, 10, and air-tightly and liquid-tightly fastened
to the header 10, 10.
Each heat-exchange tube 20 is constructed by bending a belt-shaped metal plate 22 on
which solder is clad on both surfaces thereof at a folding portion 23 provided along the
longitudinal direction of the metal plate 22, and by forming a passage 27 for the refrigerant by
attaching connecting end portions 26, 26 to the ends of the wall portions 24, 25 which are
formed by bending and which extend along the longitudinal direction of the metal plate 22.
Furthermore, to stir the refrigerant which flows in the heat- exchange tubes 20, 20... in
order to unify the temperature of the refrigerant, a plurality of bulging members 28, 28...
project from the wall portions 24, 25 toward the opposing wall portions. Each of these bulging
members 28, 28... has a truncated-cone shape, and a flat connecting portion 28a is provided on
the connecting end thereof. The connecting portions 28a, 28a... of the opposing bulging
members 28, 28... contact each other.
In addition, a notch 16 is provided on the connecting end portions 26, 26 of each end
portion 21 so as to unify the inserted length of the end portion 21 by attaching the notch 16 to
the edge of the insertion hole 11 when the end portion 21 is inserted into the insertion hole 11.
Furthermore, in the vicinity of opening ends 29 of both end portions 21 of the flat heat-exchange
tube 20, reinforcement members 40, 40..., which project from the wall portions 24,
25 toward the opposing wall portions, are formed. The connecting ends of opposed
reinforcement members 40, 40... contact each other and shape-holding portions 41 for
preventing the deformation of the opening ends 29 are provided by these contacted
reinforcement members 40, 40....
In the heat exchanger A which has the above-described structure, when the end portions
21 of the flat heat-exchange tubes 20 are cut along the surface which is perpendicular to the
wall portions 24, 25 to form the opening ends 29, the reinforcement members 40, 40..., which
project from the wall portions 24, 25 and which contact each other, support the wall portions
24, 25 along the cutting direction, and therefore, deformation of the wall portions 24, 25 is
prevented by the shape-holding portions 41. Furthermore, the shapes of the opening ends 29
are maintained by preventing the deformation of the wall portions 24, 25, since the opening
ends 29 are formed at the cutting surface of the end portions 21, and therefore, the end portions
21 are smoothly inserted and closely connected with the insertion holes 11.
Furthermore, the reinforcement members 40, 40... are composed of projections which
are smaller than the bulging members 28, 28... because they are not designed for stirring the
refrigerant which flows in the heat-exchange tube 20, and therefore, problems caused by
sudden expansion/contraction of the refrigerant can be prevented if the reinforcement members
40, 40... are provided adjacent to the opening ends 29.
In the heat exchanger A shown in Figs. 1 and 2, deformation of the opening ends 29 can
be prevented, and therefore, the end portions 21 can be connected with the insertion holes 11,
braze-welding between the end portions 21 and the insertion holes 11 can be performed more
properly, and the sealing performance of the heat exchanger can be improved.
Figs. 3 and 4 show a second embodiment of the heat exchanger of the present
invention. A heat-exchange tube 20 constitutes a main part of the heat exchanger denoted by
the symbol "B" (refer to Fig. 11, for example) and comprises a pair of belt-shaped plates 22a,
22b which extend along the longitudinal direction of the heat-exchange tube 20. A passage 27
for the refrigerant is provided between the plates 22a, 22b, by attaching connecting end
portions 26a, 26b which project from both ends of plates 22a, 22b and extend along the
longitudinal direction of the plates 22a, 22b. Furthermore, an insertion end portion 50, in
which the width thereof between the opposing connecting end portions 26a, 26b (the width
between the opposing side walls of the heat-exchange tube 20) becomes narrower as it
approaches the opening end 29, is provided on each end portion 21 of the heat-exchange tube
20.
In addition, a contacting portion 60 is provided on wall portions 24, 25 of the insertion
end portion 50. The contacting portion 60 is constructed of a pair of grooves 61, 62 which
extends along the longitudinal direction of the heat-exchange tube 20. These grooves 61, 62
bulge toward the opposing wall portions 24, 25 at reference positions 24a, 25a on the wall
portions 24, 25, and return to the reference positions 24a, 25a in roughly V-shaped sections.
Here, the heights of the grooves 61, 62 are set to about one-fourth of the distance between the
opposing wall portions 24, 25, and the width of the grooves 61, 62 are set to about one-tenth of
the width between the opposing connecting end portions 26a, 26b. Furthermore, the increased
amount of the length along the perimeter of each end portion 21 resulting from the formation of
the contacting portion 60 is about one-tenth of the original length along the perimeter of the
end portion 21.
In addition, an insertion hole 11 in which the heat-exchange tube 20 is connected has a
shape corresponding to the shape of the insertion end portion 50 in which the contacting
portion 60 is provided. That is, the insertion hole 11 has the same shape as the sectional shape
of the insertion end portion 50 when the insertion end portion 50 is cut along a surface which is
parallel to the opening end 29 at a predetermined position. A pair of notches 11a, 11b, in
which the connecting end portions 26a, 26b are connected, is formed at both ends of the flat
insertion hole 11, and a pair of chevron-shaped projections 111, 112, in which the grooves 61,
62 are connected, is formed on the top and bottom of the flat insertion hole 11.
In Figs. 3 and 4, other parts which correspond to the parts in Figs. 1 and 2 are given the
same reference numbers, and an explanation is omitted.
In the heat exchanger B which has the above-described structure, the opening ends 29
are smaller than the insertion holes 11. Therefore, when the end portions 21 of the flat heat-exchange
tubes 20 are cut along the surface which is perpendicular to the wall portions 24, 25
to form the opening ends 29, the end portions 21 are smoothly inserted into the insertion holes
11 even if the opening ends 29 are deformed along the cutting direction thereof. These
deformations not only arise in the opening ends 29, but also in the end portions 21 in the
vicinity of the opening ends 29; however, the deformed end portions 21 can be entirely inserted
into the insertion holes 11 by including the entire deformed end portions 21 in the insertion end
portions 50, and therefore, the end portions 21 are closely connected with the insertion holes 11
at the predetermined position.
The insertion holes 11 are larger than the opening ends 29 and smaller than the cross-sectional
shape of the heat-exchange tubes 20, since the insertion holes 11 are formed in
compliance with the insertion end portions 50. Therefore, the heat-exchange tubes 20 make
contact with the insertion holes 11 at the insertion end portions 50, and the insertion end
portions 50 are closely connected with the insertion holes 11. Furthermore, since the width
between the opposing walls of each insertion end portion 50 enlarges as the distance from the
opening end 29 increases, when a force is applied on each heat-exchange tube 20 in order to
insert the heat-exchange tube 20 into the insertion hole more deeply, the insertion end portion
50 and the insertion hole 11 are elastically deformed, and the contact area between the insertion
end portion 50 and the insertion hole 11 is increased. In addition, the insertion end portion 50,
which presses against the insertion hole 11 in the enlarging direction, receives a reaction force
which tightens the insertion end portion 50 in the insertion hole 11.
Furthermore, even when each insertion end portion 50 is not completely connected with
the insertion hole 11 by reasons concerning their processing accuracy, for example, when
complicated deformations such as a warp or distortion of the insertion end portion 50 which is
not restricted a regular deformation in a certain direction or a defect of the insertion hole 11
which is caused by uneven cutting, exist, a point(s) at which the insertion end portion 50 and
the insertion hole 11 is definitely contacted can be ensured on the contacting portion 60. For
example, even when the insertion end portion 50 contacts adjacent to the corner of the insertion
hole 11 on a roughly diagonal line thereof, since the grooves 61, 62 of the contacting portion 60
which bulge to form V-shaped sections have inclined surfaces, the grooves 61, 62 definitely
contact the chevron-shaped projections 111, 112 of the insertion hole 11 at the inclined surface.
On the other hand, the increased amount of the length along the perimeter of the insertion end
portion 50 by the formation of the contacting portion 60 is about one-tenth of the original
length along the perimeter of the insertion end portion 50. Therefore, the amount of contact
between the insertion end portion 50 and the insertion hole 11 is definitely increased due to the
formation of the contacting portion 60.
In the heat exchanger B shown in Figs. 3 and 4, the opening end 29 and end portion 21
adjacent to the opening end 29 which are deformed as a result of cutting, are smaller than the
insertion hole 11, and therefore, the deformed end portion can be entirely inserted into the
insertion hole 11. As a result, the end portion 21 can be connected with the insertion hole 11 at
the insertion end portion 50, and therefore, braze-welding between the insertion end portion 50
and the insertion hole 11 can be performed more properly, and the sealing performance of the
heat exchanger B can be improved.
Furthermore, the numbers of contact points and the amount of contact between the
insertion end portion 50 and the insertion hole 11 can be increased through the formation of the
contacting portion 60. Therefore, braze-welding between the insertion end portion 50 and the
insertion hole 11 can be performed more properly, and the sealing performance of the heat
exchanger B can be improved.
Furthermore, since the width between the opposing walls of each insertion end portion
50 is enlarged as the distance from the opening end 29 increases, the insertion end portion 50,
which presses against the insertion hole 11 in the enlarging direction, receives a reaction force
which tightens the insertion end portion 50 in the insertion hole 11, and therefore, the
deformation caused by the spring back force which acts to separate the wall portions 24, 25
which are positioned on the top and bottom facing each other, can be prevented. Consequently,
braze-welding between each of the connecting portions 26a, 26a, 26b, 26b, and the opposing
bulging members 28, 28... projecting from the end portion 21 of the heat-exchange tube 20 in
which the fins 30 cannot be provided, can be performed more properly, and the sealing
performance and resistance against the pressure of the heat exchanger B can be improved.
In addition, in the above-described embodiment, the grooves 61, 62 which bulge
inwardly from the wall portions 24, 25 of each insertion end portion 50 are provided as the
contacting portion 60; however, as shown in Figs. 5 and 6, bulging portions 63, 64 which bulge
outwardly from the wall portions 24, 25 may be provided on the outer surface of each insertion
end portion 50 as the contacting portion 60. The bulging portions 63, 64 have roughly
semicircular-shaped sections and sizes roughly the same as that of the grooves 61, 62 in their
lengths, heights, and widths. In this case, a pair of semicircular-shaped grooves 113, 114 in
which the bulging portions 63, 64 are connected, is formed at the top and bottom of each
insertion hole 11.
Furthermore, as shown in Figs. 7 and 8, in the heat exchanger B, bulging portions 65,
66 which bulge outwardly from the wall portions 24, 25, may also be provided on the outer
surface of each insertion end portion 50 as the contacting portion 60. The bulging portions 65,
66 have wide top or bottom end surface and heights roughly the same as that of the bulging
portions 63, 64. In this case, a pair of notches 115, 116, which have shapes so as to connect
with the bulging portions 65, 66, is formed at the top and bottom of each insertion hole 11.
Furthermore, as shown in Figs. 9, 10 and 11, in the heat exchanger B, curved portions
67, 68 which have curved surfaces curved inwardly toward the center portions of wall portions
24, 25 and which have heights roughly the same as that of the grooves 61, 62 may also be
provided on the tip portion of each insertion end portion 50 as the contacting portion 60. In this
case, a pair of curved edges 117, 118, which have shapes so as to connect with the curved
portions 67, 68, are formed at the top and bottom of each insertion hole 11.
Furthermore, as shown in Figs. 12, 13 and 14, in the heat exchanger B, an oval portion
69 which has a curved surface bulging outwardly from the outer surface of the wall portions 24,
25 along the perimeter thereof, may also be provided on the base portion of the insertion end
portion 50, that is, the position at which the width of the insertion end portion 50 becomes
equal to that of the heat-exchange tube 20, of each insertion end portion 50 as the contacting
portion 60. In this case, each insertion hole 11 forms an oval hole 119 in order to connect with
the heat-exchange tube 20 closely at the point at which the oval portions 69 are formed.
In these example, since the contacting portion 60 as described above is provided at the
outer surface of each insertion end portion 50, even when complicated deformations such as a
warp or distortion of the insertion end portion 50 which is not restricted a regular deformation
in a certain direction or a defect of the insertion hole 11 which is caused by uneven cutting
exist, a connection between the insertion end portion 50 and the insertion hole 11 can be
performed more certainly. Furthermore, the increased amounts of the lengths along the
perimeter of the insertion end portions 50 by the formation of the contacting portions 60 are
about one tenth of the original lengths along the perimeter of the insertion end portions 50.
Therefore, the amount of contact between each insertion end portion 50 and the insertion hole
11 is definitely increased through the formation of the contacting portion 60, braze-welding can
be performed more properly, and the sealing performance of the heat exchanger B can be
improved..
Furthermore, when the oval portion 69 is employed as the contacting portion 60, since
each insertion end portion 50 makes contact with the oval hole 119 on the oval portion 69 of
the curved surface which faces the opening end 29, when the oval portion 69 is inserted into the
oval hole 119, contact points between the oval portion 69 and the oval hole 119 are increased
by the elastic deformation thereof as the insertion force of the oval portion 69 is increased as
well as the reaction force from the oval hole 119 which tighten the oval portion 69, and
therefore, the deformation due to a spring back force which separates the wall portions 24, 25
which are positioned on the top and bottom facing each other, can be prevented.
Figs. 15 and 16 show a third embodiment of the heat exchanger of the present
invention. In a heat-exchange tube 20 constituting a main part of the heat exchanger denoted
by the symbol "C" shown in Figs. 15 and 16, a corner 29a of the opening end 29 is partly cut
off. Furthermore, one of the connecting portions 26, 26 is outwardly extended and bent to form
a U-shaped fastening plate 26c which fastens the connecting portions 26, 26.
In Figs. 15 and 16, other parts which correspond to the parts in Figs. 1 to 14 are given
the same reference numbers, and an explanation is omitted.
When cutting the end portion 21 along the surface which is perpendicular to the
opposing wall portions 24, 25 of the flat heat-exchange tube 20 in order to produce the opening
ends 29, even if the opening end 29 is deformed along the cutting direction thereof and the
width of the opening end 29 is extended, the width of an end of the opening end 29 becomes
narrower than the insertion hole 11 because the comer 29a of the opening end 29 is cut off, and
therefore, the end portion 21 is smoothly inserted into the insertion hole 11. Here, the cut-off
of the corner 29a beginning from the opening end 29 in order to prevent additional deformation
of the wall portions 24, 25. In actuality, deformations not only arise in the opening end 29, but
also in the end portion 21 in the vicinity of the opening end 29, and the width of the end portion
is also extended in the vicinity of the opening end 29, however, since the deformation of the
end portion 21 decreases with the distance from the opening end 29, the deformed end portion
21 is entirely inserted into the insertion hole 11 by including the entire deformed end portion 21
in the insertion hole 11, and therefore, the end portion 21 is closely connected with the
insertion hole 11 at the predetermined position in which the deformation does not arise.
In the heat exchanger C shown in Figs. 15 and 16, the end of the opening end 29 which
is deformed by cutting can be smoothly inserted into the insertion hole 11 because the width of
the opening end 29 becomes narrower than the insertion hole 11 by cut-off of the comer 29a of
the opening end 29. Then, the end portion 21 can be closely connected with the insertion holes
11, and therefore, braze-welding between the end portion 21 and the insertion hole 11 can be
performed more properly, and the sealing performance of the heat exchanger C can be
improved.
Furthermore, as the result of clipping the corner 29a, the area of the end portion 21
which is inserted into the header 10 through the insertion hole 1 and the amount of the
inserted area in the pathway of the refrigerant when the header 10 along the longitudinal
direction are decreased, and the loss of the refrigerant can be reduced in comparison with that
of when the the comer 29a is not cut off.
In addition, the corner 29a of the opening end 29 is cut off in a straight line in this
embodiment; however, a larger area can be cut off as long as the comer 29a is included.
Furthermore, it is not necessary to cut off the opening end 29 in a straight line. As a result of
these improvements, the opening end 29 which is deformed can be more smoothly inserted into
the insertion hole 11 because the width of an end of the opening end 29 becomes more narrow,
and the loss of the refrigerant can be reduced more.
Figs. 17 and 18 show a fourth embodiment of the heat exchanger of the present
invention. In heat-exchange tubes 20 constituting the main parts of the heat exchanger denoted
by the symbol "D" shown in Figs. 17 and 18, the contact ends of the opposing bulging
members 28, 28... projecting from the end portions 21 of the heat-exchange tubes 20 in which
the fins 30, 30... cannot be provided, are welded by laser, and these laser-welded bulging
members 28, 28... provide a removal prevention member 70.
In Figs. 17 and 18, other parts which correspond to the parts in Figs. 1 to 16 are given
the same reference numbers, and an explanation is omitted.
In the heat-exchange tubes 20 formed by bending a metal plate, forces which deform
the tubes along the opening direction of the tubes and which separate the upper and lower wall
portions 24, 25 which face each other, is produced by a spring back force. However, the
deformations caused by the spring back force are prevented as a result of the connection of the
wall portions 24, 25 by the laser-welding of the contact ends of the opposing bulging members
28, 28....
In the heat exchanger D shown in Figs. 17 and 18, the deformations of the wall portions
24, 25 of the flat heat-exchanges tubes 20 caused by the spring back force can be prevented by
the connection of the wall portions 24, 25 by the laser-welding of the contact ends of the
opposing bulging members 28, 28. Therefore, braze-welding between the connecting portions
28a, 28a..., which contact each other, and the opposing bulging members 28, 28..., can be
performed more properly, and resistance against the pressure of the heat exchanger D can be
improved; as braze-welding between the connecting end portions 26, 26 can be performed
more properly as well, and the sealing performance and resistance against the pressure of the
heat exchanger D can be improved.
Figs. 19 and 20 show a fifth embodiment of the heat exchanger of the present invention.
In heat-exchange tubes 20 constituting the main parts of the heat exchanger denoted by the
symbol "E" shown in Figs. 19 and 20, a pair of projections which face each other are provided
on the wall portions 24, 25 at the end portions 21 nearby. Each upper projection has a hole 71
and each lower projection has a pipe member 72. The end of the pipe member 72 which passes
through the hole 71 is turned downward and caulked, and therefore, a caulked portion 73 is
provided on the ends of the projections and the projections are fastened by this caulked portion
73. Namely, in this embodiment, the projections which are fastened by the caulked portion 73
provide a removal prevention member 70.
In Figs. 19 and 20, other parts which correspond to the parts in Figs. 1 to 18 are given
the same reference numbers, and an explanation is omitted.
In the heat-exchange tubes 20 formed by bending a metal plate, forces which deform
the tubes along the opening direction of the tubes and which separate the upper and lower wall
portions 24, 25 which face each other, are produced by a spring back force. However, the
deformations by the spring back force are prevented as a result of the connection of the wall
portions 24, 25 by the caulked portion 73.
In the heat exchanger E shown in Figs. 19 and 20, the deformations of the wall portions
24, 25 of the flat heat-exchange tubes 20 by the spring back force can be prevented by the
connection of the wall portions 24, 25 by the caulked portion 73. Therefore, braze-welding
between the connecting portions 28a, 28a... which contact each other, of the opposing bulging
members 28, 28..., can be performed more properly, and resistance against the pressure of the
heat exchanger E can be improved; as braze-welding between the connecting end portions 26,
26 can be performed more properly as well, and the sealing performance and resistance against
the pressure of the heat exchanger E can be improved.
In addition, in this embodiment, the projections of the wall portions 24, 25 are fastened
by caulking the ends thereof; however, the projections may be also fastened by welding or by
using a rivet, a stapler, or the like.
Figs. 21 and 22 show a sixth embodiment of the heat exchanger of the present
invention. In heat-exchange tubes 20 constituting the main parts of the heat exchanger denoted
by the symbol "F" shown in Figs. 21 and 22, a part of each lower wall portion 25 is extended
from the opening end 29. This extended part bends upward and toward the upper wall portion
24, and forms a fastening clip 74 which is fastened to the wall portion 24. Namely, in this
embodiment, the fastening clip 74, which is formed at the opening end 29, provides a removal
prevention member 70. Furthermore, an opening which has a shape corresponding to the
fastening clip 74 is provided at the upper end of each insertion hole 11 so as to engage with the
fastening clip 74.
In Figs. 21 and 22, other parts which correspond to the parts in Figs. 1 to 20 are given
the same reference numbers, and an explanation is omitted.
In the heat-exchange tubes 20 formed by bending a metal plate, forces which deform
the tubes along the opening direction of the tubes and which separate the upper and lower wall
portions 24, 25 which face each other, are produced by a spring back force. However, the
deformations by the spring back force are prevented as a result of the connection of the wall
portions 24, 25 by the fastening clip 74.
In the heat exchanger F shown in Figs. 21 and 22, the deformations of the wall portions
24, 25 of the flat heat-exchange tubes 20 by the spring back force can be prevented by the
connection of the wall portions 24, 25 by the fastening clip 74. Therefore, braze-welding
between the connecting portions 28a, 28a... which contact each other, of the opposing bulging
members 28, 28..., can be performed more properly, and resistance against the pressure of the
heat exchanger F can be improved; as braze-welding between the connecting end portions 26,
26 can be performed more properly as well, and the sealing performance and resistance against
the pressure of the heat exchanger F can be improved.
In addition, in the above-described embodiments, in order to achieve a high braze-welding
property of the heat exchanger for improving its sealing performance and resistance
against the pressure, one of the shape-holding portions 41, the insertion end portions 50 having
contacting portions 60, the opening ends 29 in which the comers 29a are partly cut off, or the
removal prevention members 70, is provided, however, these means can be simultaneously
provided within the same heat exchanger.
Claims (10)
- A heat exchanger comprising:a pair of headers (10, 10) which are provided in parallel to face through a predetermined distance and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes (20, 20...) which are provided between said headers in parallel, both ends thereof are fastened to said headers and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, whereinconnecting structures between said headers and heat-exchange tubes are provided by inserting end portions (21, 21...) of said heat-exchange tubes into insertion holes (11, 11...) which are bored on said headers, and air-tightly and liquid-tightly fastening said headers and heat-exchange tubes; andshape-holding portions (41) for preventing the deformation of opening ends (29) of said heat-exchange tubes are provided in the vicinity of the opening ends of each heat-exchange tube.
- A heat exchanger according to claim 1, wherein said shape-holding portions are provided by reinforcement members (40, 40...) which project from at least one of opposing wall portion (24, 25) of said heat-exchange tube toward the opposing wall portion, and the connecting ends of opposing reinforcement members are in contact with each other.
- A heat exchanger comprising:a pair of headers (10, 10) which are provided in parallel facing each other through a predetermined distance and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes (20, 20...) which are provided between said headers in parallel, both ends thereof are fastened to said headers, and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, whereinconnecting structures between said headers and heat-exchange tubes are provided by inserting end portions (21, 21...) of said heat-exchange tubes into insertion holes (11, 11...) which are bored on said headers, and air-tightly and liquid-tightly fastening said headers and heat-exchange tubes; andan insertion end portion (50), in which the width thereof between opposing side walls of said heat-exchange tubes becomes narrower as it approaches an opening end (29) of said heat-exchange tubes, which is provided on each end portion of said heat-exchange tubes.
- A heat exchanger according to claim 3, wherein each of said insertion holes has a shape corresponding to the shape of said insertion end portion.
- A heat exchanger according to claim 4, wherein said insertion end portion has a contacting portion (60) which inwardly or outwardly projects from the outer surface thereof, and each insertion hole has a shape corresponding to the shape of said insertion end portion in which said contacting portion is provided.
- A heat exchanger comprising:a pair of headers (10, 10) which are provided in parallel facing each other through a predetermined distance and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes (20, 20...) which are provided between said headers in parallel, both ends thereof are fastened to said headers, and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, whereinconnecting structures between said headers and heat-exchange tubes are provided by inserting end portions (21, 21...) of said heat-exchange tubes into insertion holes (11, 11...) which are bored on the header, and air-tightly and liquid-tightly fastening said header and heat-exchange tubes; anda corner (29a) of an opening end (29) of each heat-exchange tube is partly cut off.
- A heat exchanger comprising:a pair of headers (10, 10) which are provided in parallel facing each other through a predetermined distance and a pathway of the fluid is respectively provided therein; a plurality of flat heat-exchange tubes (20, 20...) which are provided between said headers in parallel, both ends thereof are fastened to said headers, and a pathway of the refrigerant for connecting the pathways of both headers is respectively provided therein, whereinconnecting structures between said headers and heat-exchange tubes are provided by inserting end portions (21, 21...) of said heat-exchange tubes into insertion holes (11, 11...) which are bored on the header, and air-tightly and liquid-tightly fastening said header and heat-exchange tubes; anda removal prevention member (70) which is fastened to opposing wall portions (24, 25) of each heat-exchange tube for preventing the deformation of said heat-exchange tube caused by the removal of said wall portions, an which is provided on at least one of said wall portions.
- A heat exchanger according to claim 7, wherein said removal prevention member is provided by bulging members (28, 28...) which project from respective wall portions toward the opposing wall portions, and the connecting ends of said opposing bulging members contact each other and are welded by laser.
- A heat exchanger according to claim 7, wherein said removal prevention member is provided by projections which project from respective wall portions toward the opposing wall portions, a hole (71) which is provided on one of the projections, a pipe member (72) which is provided on the other projection and passes through the hole, and a caulked portion (73) which is provided on the ends of said projections for fastening said projections by turned downward and caulking the end of said pipe member.
- A heat exchanger according to claim 7, wherein said removal prevention member is provided by extending a part of one of the opposing wall portions from each opening end (29) of said heat-exchange tubes and bending toward the other wall portion so as to be fastened to the other wall portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000060914A JP2001248988A (en) | 2000-03-06 | 2000-03-06 | Heat exchanger |
| JP2000060914 | 2000-03-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1132706A2 true EP1132706A2 (en) | 2001-09-12 |
| EP1132706A3 EP1132706A3 (en) | 2003-03-19 |
Family
ID=18581151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01105273A Withdrawn EP1132706A3 (en) | 2000-03-06 | 2001-03-05 | Heat exchanger |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20010018970A1 (en) |
| EP (1) | EP1132706A3 (en) |
| JP (1) | JP2001248988A (en) |
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| FR2841641A1 (en) * | 2002-06-27 | 2004-01-02 | Valeo Climatisation | Tube e.g. for motor vehicle engine radiator has manifold plate retaining clip formed by local outer deformation on tube |
| EP1596149A2 (en) * | 2004-05-13 | 2005-11-16 | Sanden Corporation | Heat exchangers |
| FR2980839A1 (en) * | 2011-10-04 | 2013-04-05 | Valeo Systemes Thermiques | PLATE FOR HEAT EXCHANGER AND HEAT EXCHANGER WITH SUCH PLATES |
| FR2989766A1 (en) * | 2012-04-19 | 2013-10-25 | Valeo Systemes Thermiques | Heat exchange beam for radiator for cooling engine of car, has heat exchange inserts connected to tubes, where each tube includes channel with corrugations to enhance capacity of tube to withstand internal pressure in transition zone |
| CN103502761A (en) * | 2011-02-18 | 2014-01-08 | 尼森斯公司 | A method of producing a heat exchanger and a heat exchanger |
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| DE10214467A1 (en) * | 2002-03-30 | 2003-10-09 | Modine Mfg Co | Exhaust gas heat exchanger for motor vehicles |
| MX2007009248A (en) * | 2005-02-02 | 2007-09-04 | Carrier Corp | Parallel flow heat exchanger with crimped channel entrance. |
| JP2007212084A (en) * | 2006-02-10 | 2007-08-23 | Denso Corp | Heat exchanger |
| JP5739603B2 (en) * | 2009-01-27 | 2015-06-24 | 株式会社小松製作所 | Heat exchanger |
| DE102009032782A1 (en) * | 2009-07-10 | 2011-01-13 | Behr Industry Gmbh & Co. Kg | Heat exchanger, in particular for an internal combustion engine |
| JP5517745B2 (en) * | 2010-05-24 | 2014-06-11 | サンデン株式会社 | Heat exchanger tubes and heat exchangers |
| JP5663413B2 (en) * | 2011-06-17 | 2015-02-04 | カルソニックカンセイ株式会社 | Serpentine heat exchanger |
| JP5772608B2 (en) * | 2012-01-12 | 2015-09-02 | 株式会社デンソー | Heat exchanger |
| EP2972036B1 (en) | 2013-03-14 | 2018-06-13 | Duramax Marine, LLC | Turbulence enhancer for keel cooler |
| KR101583921B1 (en) * | 2014-05-02 | 2016-01-11 | 현대자동차주식회사 | Method and apparatus for manufacturing heat exchanger for vehicle |
| GB2545109B (en) * | 2014-09-25 | 2020-09-30 | Mitsubishi Electric Corp | Refrigerant pipe, method of manufacturing the refrigerant pipe, and heat exchanger including the refrigerant pipe |
| US10697703B2 (en) | 2014-12-02 | 2020-06-30 | Duramax Marine, Llc | Marine heat exchanger |
| CN111366013A (en) * | 2018-12-26 | 2020-07-03 | 浙江盾安热工科技有限公司 | Flat pipe and heat exchanger |
| JP7230502B2 (en) * | 2018-12-27 | 2023-03-01 | 株式会社デンソー | Heat exchanger |
| CN112682500B (en) * | 2020-12-31 | 2023-05-26 | 南宁市安和机械设备有限公司 | Oil cooler made of staggered dotting oil cooler tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335830A (en) * | 1989-07-03 | 1991-02-15 | Calsonic Corp | Manufacture of aluminum heat exchanger |
| DE4340378A1 (en) * | 1992-11-27 | 1994-06-01 | Zexel Corp | Heat exchanger with ribs - has heat radiation ribs arranged between several tubes and two end parts of each tube connected to collecting conduits |
| GB2299037A (en) * | 1995-03-22 | 1996-09-25 | Behr Gmbh & Co | Flat tube for a soldered heat exchanger and a method for its production |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58221393A (en) * | 1982-06-18 | 1983-12-23 | Hitachi Ltd | Corrugate type heat exchanger |
| US4458749A (en) * | 1983-04-18 | 1984-07-10 | Ex-Cell-O Corporation | Radiator having reinforced tubes |
| JPH0612229B2 (en) * | 1986-07-29 | 1994-02-16 | Ｑ洋ラジエ−タ−株式会社 | Tube junction of heat exchanger |
| DE8801411U1 (en) * | 1988-02-05 | 1988-03-24 | Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co Kg, 7000 Stuttgart, De | |
| DE4015830C2 (en) * | 1990-05-17 | 2000-10-12 | Behr Gmbh & Co | Heat exchangers, especially water / air coolers |
| US5046555A (en) * | 1990-09-06 | 1991-09-10 | General Motors Corporation | Extended surface tube-to-header connection for condenser |
| JPH08145586A (en) * | 1994-11-24 | 1996-06-07 | Zexel Corp | Flat tube for heat exchanger |
| JP3433400B2 (en) * | 1995-02-17 | 2003-08-04 | カルソニックカンセイ株式会社 | Forming method of protruding hole |
| JPH09229584A (en) * | 1996-02-23 | 1997-09-05 | Sanden Corp | Tube unit for heat exchanger and heat exchanger using the same |
| KR100261006B1 (en) * | 1996-07-03 | 2000-07-01 | 오타 유다카 | Flat tube for radiator |
| JPH10206079A (en) * | 1997-01-14 | 1998-08-07 | Zexel Corp | Heat-exchanger |
| JPH10332294A (en) * | 1997-06-03 | 1998-12-15 | Calsonic Corp | Tube for heat exchanger |
-
2000
- 2000-03-06 JP JP2000060914A patent/JP2001248988A/en not_active Withdrawn
-
2001
- 2001-03-05 EP EP01105273A patent/EP1132706A3/en not_active Withdrawn
- 2001-03-06 US US09/798,901 patent/US20010018970A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0335830A (en) * | 1989-07-03 | 1991-02-15 | Calsonic Corp | Manufacture of aluminum heat exchanger |
| DE4340378A1 (en) * | 1992-11-27 | 1994-06-01 | Zexel Corp | Heat exchanger with ribs - has heat radiation ribs arranged between several tubes and two end parts of each tube connected to collecting conduits |
| GB2299037A (en) * | 1995-03-22 | 1996-09-25 | Behr Gmbh & Co | Flat tube for a soldered heat exchanger and a method for its production |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2841641A1 (en) * | 2002-06-27 | 2004-01-02 | Valeo Climatisation | Tube e.g. for motor vehicle engine radiator has manifold plate retaining clip formed by local outer deformation on tube |
| EP1596149A2 (en) * | 2004-05-13 | 2005-11-16 | Sanden Corporation | Heat exchangers |
| EP1596149A3 (en) * | 2004-05-13 | 2006-10-25 | Sanden Corporation | Heat exchangers |
| CN103502761A (en) * | 2011-02-18 | 2014-01-08 | 尼森斯公司 | A method of producing a heat exchanger and a heat exchanger |
| FR2980839A1 (en) * | 2011-10-04 | 2013-04-05 | Valeo Systemes Thermiques | PLATE FOR HEAT EXCHANGER AND HEAT EXCHANGER WITH SUCH PLATES |
| WO2013050393A1 (en) * | 2011-10-04 | 2013-04-11 | Valeo Systemes Thermiques | Plate for heat exchanger and heat exchanger equipped with such plates |
| CN103975215A (en) * | 2011-10-04 | 2014-08-06 | 法雷奥热系统公司 | Plate for heat exchanger and heat exchanger equipped with such plates |
| FR2989766A1 (en) * | 2012-04-19 | 2013-10-25 | Valeo Systemes Thermiques | Heat exchange beam for radiator for cooling engine of car, has heat exchange inserts connected to tubes, where each tube includes channel with corrugations to enhance capacity of tube to withstand internal pressure in transition zone |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1132706A3 (en) | 2003-03-19 |
| JP2001248988A (en) | 2001-09-14 |
| US20010018970A1 (en) | 2001-09-06 |
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