US20100116483A1 - Heat exchange device and method of manufacturing the same - Google Patents
Heat exchange device and method of manufacturing the same Download PDFInfo
- Publication number
- US20100116483A1 US20100116483A1 US12/593,003 US59300308A US2010116483A1 US 20100116483 A1 US20100116483 A1 US 20100116483A1 US 59300308 A US59300308 A US 59300308A US 2010116483 A1 US2010116483 A1 US 2010116483A1
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- US
- United States
- Prior art keywords
- connecting pipe
- tubes
- heat exchange
- exchange device
- tightly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims description 22
- 238000005219 brazing Methods 0.000 description 10
- 239000000956 alloy Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 7
- 238000005338 heat storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0012—Brazing heat exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/005—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having bent portions or being assembled from bent tubes or being tubes having a toroidal configuration
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/14—Heat exchangers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
Definitions
- This invention relates to a heat exchange device for exchanging heat between a high temperature medium and a low temperature medium. More specifically, the present invention relates to a heat exchange device exchanging the heat through a partition wall by flowing the high temperature medium or the low temperature medium into a plurality of narrow tubes.
- Japanese Patent Laid-Open No. 2005-233597 discloses a heat storage heat exchanger having a plurality of tubes for letting through a heat medium. According to the heat storage heat exchanger taught by Japanese Patent Laid-Open No. 2005-233597, both ends of the tubes are gathered and connected with connecting pipes. Therefore, heat is exchanged between the heat medium flowing through the tubes and a heat storage material.
- the plurality of tubes are gathered at both end thereof.
- the end portions of the gathered tubes have to be aligned more accurately.
- the present invention has been conceived noting the technical problem thus far described, and its object is to provide a heat exchange device in which a plurality of tubes for flowing a heat medium therethrough are gathered at both ends, and a method for manufacturing the same.
- a heat exchange device comprising: a first heat medium and a second heat medium exchanging heat mutually; and a plurality of narrow tubes for letting through one of the heat media; characterized in that: end portions of the plurality of narrow tubes is gathered to seal a clearance among the tubes liquid-tightly or air-tightly; and the gathered ends of the narrow tubes are fitted into a connecting pipe whose diameter is larger than that of the gathered tubes liquid-tightly or air-tightly.
- the heat exchange device further comprises: a hollow header; and a plurality of holes formed on one of the surfaces of the header.
- the connecting pipe is fitted into the hole liquid-tightly or air-tightly.
- a method for manufacturing a heat exchange device having a plurality of narrow tubes comprising: end portions of the plurality of narrow tubes is gathered to seal a clearance among the narrow tubes liquid-tightly or air-tightly; and fitting the gathered ends of the narrow tubes into a connecting pipe liquid-tightly or air-tightly.
- the connecting pipe is contracted in a direction opposite to a direction toward a side in which the narrow tubes are inserted.
- the connecting pipe is contracted in a direction opposite to a direction toward a side in which the tubes are inserted by applying a tension in the axial direction of the connecting pipe.
- the connecting pipe is fitted into a hole formed on a surface of a header.
- the aforementioned hole comprises a circular flange so that the connecting pipe fitted therein can be held tightly.
- the end portion of the gathered tubes is thus fitted tightly into the connecting pipe whose internal diameter is larger at the side into which the gathered tubes are inserted. Therefore, a positional accuracy of the tubes fitted into the connecting pipe can be improved. Moreover, since the narrow tubes are used for letting through the first or the second heat medium, a clearance among the tubes can be narrowed. Therefore, a heat exchange portion where heat exchange takes place between the first heat medium and the second heat medium can be downsized.
- the plurality of connecting pipes is attached to the header. That is, in addition to the above advantages, a larger number of the narrow tubes can be attached to the header. As a result, a total surface area of the tubes for letting through the first heat medium or the second heat medium can be increased so that the heat exchange capacity of the heat exchange device can be enhanced.
- the inner diameter of the connecting pipe at one of the end side thereof is larger than that at the other end side, and the gathered narrow tubes are fitted into the connecting pipe from the side of the larger diameter. For this reason, the narrow tubes can be inserted into the connecting pipe easily and tightly.
- the connecting pipe After fitting the plurality of narrow tubes into the connecting pipe from the side of larger diameter, the connecting pipe is contracted with respect to the axial direction thereof. Since the connecting pipe is thus contracted with respect to the axial direction thereof, the plurality of narrow tubes fitted into the connecting pipe can be tightened easily.
- the connecting pipe can be contracted homogeneously in the direction perpendicular to the axial direction thereof.
- the tension will not be applied to the narrow tubes locally so that the narrow tubes can be prevented from being squeezed.
- the contracted connecting pipe is attached to the header, a larger number of the narrow tubes can be attached to the header.
- the heat exchange capacity of the heat exchange device can be enhanced in comparison with the conventional heat exchange devices.
- the hole formed on the surface of the header comprises the circular flange. Therefore, in addition to the above-mentioned advantages, the connecting pipe fitted into the hole can be held tightly from an outer circumference thereof by the circular flange. For this reason, the connecting pipe can be welded easily to be attached to the header.
- FIG. 1 is a view schematically showing a connecting pipe and tubes according to the present invention.
- FIG. 2 is a view showing one example of the heat exchange device according to the present invention.
- FIG. 3 is a view showing another example of the heat exchange device according to the present invention.
- FIG. 4 is a view showing a connection between the header and the connecting pipe.
- FIG. 5 is a view showing one example of attaching a plurality of the heat exchange device to the header.
- FIG. 6 is a view showing another example of attaching a plurality of the heat exchange device to the header.
- FIG. 7 is a view showing another example of attaching a plurality of the heat exchange device to the header.
- FIG. 8 is a view showing another example of attaching a plurality of the heat exchange device to the header.
- FIG. 9 is a view showing a step of fitting the tubes into the connection pipe.
- FIG. 10 is a view showing a shape of the connection pipe to which the tubes are inserted.
- FIG. 1 ( a ) is a conceptual diagram schematically showing a top view of a heat exchange device 1
- FIG. 1 ( b ) is a conceptual diagram schematically showing a side view of the heat exchange device 1
- the heat exchange device 1 comprises a plurality of narrow tubes 2 made of metal such as aluminum, and the heat exchange device 1 is adapted to exchange the heat between a first heat medium 3 or a second heat medium 4 flowing through the tubes 2 and another heat medium held in the heat exchange device 1 .
- the first heat medium 3 is a cooling medium functioning as a thermal input medium
- the second heat medium 4 is brine functioning as a thermal output medium.
- the first heat medium 3 is used to flow into the tubes 2 .
- the tubes 2 are gathered and both ends thereof are aligned.
- the end portions of the tubes 2 are individually inserted tightly in a connecting pipe 5 to be contacted with each other, and fixed with an inner circumference of the connecting pipe 5 by a brazing method or the like.
- the end portions of the tubes 2 are individually held in the connecting pipe 5 liquid tightly and air tightly.
- a diameter of the connecting pipe 5 is expanded at the side of holding the tubes 2 .
- a diameter of the connecting pipe 5 is reduced at the side of extension. Therefore, a positional accuracy of the leading ends of the tubes 2 can be improved when fitting the tubes 2 into the connecting pipe 5 .
- the heat exchange device 1 is depicted in more detail in FIGS. 2 and 3 .
- the plurality of narrow pipes 2 are held in a core 6 at certain intervals, and a heat medium other than the first heat medium 3 is also held in the core 6 .
- the core 6 may also be adapted to allow the second heat medium 4 around the heat exchange device 1 flowing into the core 6 . Therefore, heat is exchanged between the first heat medium 3 and said other heat medium or the second heat medium 4 .
- An outer shape of the core 6 should not be limited to a specific shape.
- a shape of an intermediate portion of the core 6 may be a rectangular column. In this case, each face of both ends of the core 6 is inclined toward the connecting pipe 5 to reduce the diameter of the core 6 gradually, and a leading end of the core 6 is inserted into the connecting pipe 5 .
- a shape of an intermediate portion of the core 6 is a cylinder. In this case, the diameter of the core 6 is reduced gradually toward the connecting pipes 5 at both ends thereof. That is, the end shape of the core 6 is a circular cone to be inserted into the connecting pipe 5 .
- FIGS. 4 ( a ) and ( b ) An example of attaching the heat exchange device 1 to a header 7 is shown in FIGS. 4 ( a ) and ( b ).
- the tubes 2 are held in the core 6 of the heat exchanger 1 , and the leading end of the tubes 2 is inserted into the connecting pipe 5 .
- one or more hole(s) 8 is/are formed by pressing or the like.
- a circular flange 9 is formed around the hole 8 .
- the connecting pipe 5 is inserted into the hole 8 and held by the circular flange 9 . Therefore, the connecting pipe 5 can be fitted in the hole 8 certainly.
- brazing alloy is applied to the connection between the tubes 2 and the connecting pipe 5 .
- both of the connections between the tubes 2 and the connecting pipe 5 and between the hole 8 and the connecting pipe 5 are fixed by heating the integrated heat exchange device 1 and the header 7 in a furnace.
- the heat exchange device 1 and the header 7 can be integrated easily without requiring any specific tool to hold the core 6 in the furnace.
- FIGS. 5 and 6 Examples of assembling the plurality of heat exchange devices 1 and the headers 7 are shown in FIGS. 5 and 6 .
- a plurality of holes 8 is formed on one of the surfaces of the header 7 , and the connecting pipes 5 of the heat exchange devices 1 are individually inserted therein.
- the headers 7 are attached to both of the connecting pipes 5 , in other words, the headers 7 are attached to both ends of the heat exchange device 1 .
- the header 7 is a hollow structured plate material, and the connecting pipe 5 and the header 7 are communicated with each other. Therefore, the second heat medium 4 flowing in the hearer 7 is allowed to flow into the tubes 2 via the connecting pipe 5 .
- the plurality of heat exchange devices 1 holding the plurality of tubes 2 is attached to the header 7 . Therefore, the first heat medium 3 is allowed to flow into large number of the tubes 2 .
- the second heat medium 4 intervenes in a space among the heat exchange devices 1 . Therefore, the heat is exchanged between the first heat medium 3 flowing through the tubes 2 and the second heat medium 4 existing around the heat exchange device 1 through another heat medium held in the core 6 or through the second heat medium 4 flowing into the core 6 . In case the heat is exchanged between the first heat medium 3 and said another heat medium, the heat is transmitted from the first heat medium 3 to said another heat medium, and then, transmitted from said another heat medium to the second heat medium 4 .
- the shape of the core 6 should not be limited to the specific shape such as cylinder or column.
- FIGS. 7 and 8 An example of accommodating the heat exchange devices 1 and the headers 7 in a casing 10 is shown in FIGS. 7 and 8 .
- the casing 10 holds the second heat medium 4 therein.
- the header 7 and the tubes 2 are communicated with each other through the connecting pipe 5 . Therefore, the first heat medium 3 or the second heat medium 4 flowing thorough the header 7 is allowed to flow into the tubes 2 via the connecting pipe 5 .
- both of the connecting pipes 5 of both ends of the heat exchange device 1 are connected individually with the header 7 . Therefore, the first heat medium 3 or the second heat medium 4 flowing thorough one of the headers 7 is allowed to flow into the other header 7 through the connecting pipes 5 and the tubes 2 .
- FIG. 9 ( a ) schematically shows a step of inserting the plurality of narrow pipes 2 into the connecting pipe 5 .
- the plurality of narrow tubes 2 having a predetermined diameter are formed simultaneously while being aligned parallel to each other. Both ends of the tubes 2 are aligned and gathered.
- the tubes 2 may also be formed one by one. In this case, the tubes 2 are placed in a mold to align end portions thereof.
- the connecting pipe 5 is fitted on an outer face of each end of the tubes 2 .
- the inner diameter of the connecting pipe 5 is larger at the side to which the tubes 2 are inserted, and smaller at the other side to which the tubes 2 are not inserted.
- the connecting pipe 5 is then inserted into the hole 8 formed on the surface of the header 7 .
- a plurality of the holes 8 is formed on one of the surfaces of the header 7 . Therefore, a plurality of the heat exchange devices can be attached to the header 7 . For this reason, the heat exchange device excellent in heat exchange capacity can be manufactured by the method of the present invention.
- the connecting pipe 5 to be used in this method comprises a protrusion 12 on its inner surface. Therefore, the end portion of the tubes 2 inserted into the connecting pipe 5 is tightened by the protrusion 12 .
- the forming procedure of the tubes 2 is identical to that in the aforementioned manufacturing method, so further explanation about the forming of the tubes 2 is omitted.
- a brazing alloy is applied to a portion of the tubes 2 in the vicinity of the connecting pipe 5 holding the tubes 2 , and the heat exchange device 1 is heated in the furnace.
- a clearance still exists among the tubes 2 even after tightened in the connecting pipe 5 . Therefore, the brazing alloy heated in the furnace is allowed to enter into the clearance among the tubes 2 .
- the tubes 2 are brazed with the connecting pipe 5 , and the clearance among the tubes 2 is sealed by the brazing alloy.
- the tool for tightening the connection pipe 5 with the tubes 2 can be reduced. Therefore, the manufacturing method can be simplified.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
To provide a heat exchange device having tubes both ends thereof are fitted into a connecting pipe thereby exchanging heat at a surface of the tube, and a method of manufacturing the same.
In a heat exchange device 1, both ends of a plurality of tubes 2 for letting through a second heat medium 4 are fitted tightly into connecting tubes 5 while being contacted with a first heat medium 3 thereby exchanging heat between the first and the second heat media 3 and 4, and an inner diameter of the connecting pipe 5 is larger at the side in which the tubes 2 are fitted.
Description
- This invention relates to a heat exchange device for exchanging heat between a high temperature medium and a low temperature medium. More specifically, the present invention relates to a heat exchange device exchanging the heat through a partition wall by flowing the high temperature medium or the low temperature medium into a plurality of narrow tubes.
- In order to improve heat transfer efficiency between heat media, a conventional heat exchanger, heat accumulator, cold accumulator or the like is provided with a plurality of tubes penetrating through heat storage material. For example, Japanese Patent Laid-Open No. 2005-233597 discloses a heat storage heat exchanger having a plurality of tubes for letting through a heat medium. According to the heat storage heat exchanger taught by Japanese Patent Laid-Open No. 2005-233597, both ends of the tubes are gathered and connected with connecting pipes. Therefore, heat is exchanged between the heat medium flowing through the tubes and a heat storage material.
- As described, according to the heat storage heat exchanger taught by Japanese Patent Laid-Open No. 2005-233597, the plurality of tubes are gathered at both end thereof. However, the end portions of the gathered tubes have to be aligned more accurately.
- The present invention has been conceived noting the technical problem thus far described, and its object is to provide a heat exchange device in which a plurality of tubes for flowing a heat medium therethrough are gathered at both ends, and a method for manufacturing the same.
- In order to achieve the above-mentioned object, according to the present invention, there is provided a heat exchange device, comprising: a first heat medium and a second heat medium exchanging heat mutually; and a plurality of narrow tubes for letting through one of the heat media; characterized in that: end portions of the plurality of narrow tubes is gathered to seal a clearance among the tubes liquid-tightly or air-tightly; and the gathered ends of the narrow tubes are fitted into a connecting pipe whose diameter is larger than that of the gathered tubes liquid-tightly or air-tightly.
- The heat exchange device further comprises: a hollow header; and a plurality of holes formed on one of the surfaces of the header. The connecting pipe is fitted into the hole liquid-tightly or air-tightly.
- According to another aspect of the present invention, there is provided a method for manufacturing a heat exchange device having a plurality of narrow tubes, comprising: end portions of the plurality of narrow tubes is gathered to seal a clearance among the narrow tubes liquid-tightly or air-tightly; and fitting the gathered ends of the narrow tubes into a connecting pipe liquid-tightly or air-tightly.
- According to the method of the present invention, after thus fitting the gathered end of the narrow tubes into the connecting pipe, the connecting pipe is contracted in a direction opposite to a direction toward a side in which the narrow tubes are inserted.
- More specifically, after thus fitting the gathered end of the narrow tubes into the connecting pipe, the connecting pipe is contracted in a direction opposite to a direction toward a side in which the tubes are inserted by applying a tension in the axial direction of the connecting pipe.
- In addition, according to the method of the present invention, the connecting pipe is fitted into a hole formed on a surface of a header.
- The aforementioned hole comprises a circular flange so that the connecting pipe fitted therein can be held tightly.
- Further, according to the present invention, the end portion of the gathered tubes is thus fitted tightly into the connecting pipe whose internal diameter is larger at the side into which the gathered tubes are inserted. Therefore, a positional accuracy of the tubes fitted into the connecting pipe can be improved. Moreover, since the narrow tubes are used for letting through the first or the second heat medium, a clearance among the tubes can be narrowed. Therefore, a heat exchange portion where heat exchange takes place between the first heat medium and the second heat medium can be downsized.
- According to the present invention, moreover, the plurality of connecting pipes is attached to the header. That is, in addition to the above advantages, a larger number of the narrow tubes can be attached to the header. As a result, a total surface area of the tubes for letting through the first heat medium or the second heat medium can be increased so that the heat exchange capacity of the heat exchange device can be enhanced.
- As described, the inner diameter of the connecting pipe at one of the end side thereof is larger than that at the other end side, and the gathered narrow tubes are fitted into the connecting pipe from the side of the larger diameter. For this reason, the narrow tubes can be inserted into the connecting pipe easily and tightly.
- After fitting the plurality of narrow tubes into the connecting pipe from the side of larger diameter, the connecting pipe is contracted with respect to the axial direction thereof. Since the connecting pipe is thus contracted with respect to the axial direction thereof, the plurality of narrow tubes fitted into the connecting pipe can be tightened easily.
- More specifically, after fitting the plurality of narrow tubes into the connecting pipe from the side of larger diameter, a tension is applied to the connecting pipe in the axial direction of the connecting pipe to elongate the connecting pipe in the direction opposite to the side in which the tubes are inserted. As a result, in addition to the above-mentioned advantages, the connecting pipe can be contracted homogeneously in the direction perpendicular to the axial direction thereof. Thus, the tension will not be applied to the narrow tubes locally so that the narrow tubes can be prevented from being squeezed.
- In addition to the above-mentioned advantages, since the contracted connecting pipe is attached to the header, a larger number of the narrow tubes can be attached to the header. As a result, the heat exchange capacity of the heat exchange device can be enhanced in comparison with the conventional heat exchange devices.
- As also described, the hole formed on the surface of the header comprises the circular flange. Therefore, in addition to the above-mentioned advantages, the connecting pipe fitted into the hole can be held tightly from an outer circumference thereof by the circular flange. For this reason, the connecting pipe can be welded easily to be attached to the header.
-
FIG. 1 is a view schematically showing a connecting pipe and tubes according to the present invention. -
FIG. 2 is a view showing one example of the heat exchange device according to the present invention. -
FIG. 3 is a view showing another example of the heat exchange device according to the present invention. -
FIG. 4 is a view showing a connection between the header and the connecting pipe. -
FIG. 5 is a view showing one example of attaching a plurality of the heat exchange device to the header. -
FIG. 6 is a view showing another example of attaching a plurality of the heat exchange device to the header. -
FIG. 7 is a view showing another example of attaching a plurality of the heat exchange device to the header. -
FIG. 8 is a view showing another example of attaching a plurality of the heat exchange device to the header. -
FIG. 9 is a view showing a step of fitting the tubes into the connection pipe. -
FIG. 10 is a view showing a shape of the connection pipe to which the tubes are inserted. - Next, the present invention will be explained with reference to the accompanying drawings.
FIG. 1 (a) is a conceptual diagram schematically showing a top view of aheat exchange device 1, andFIG. 1 (b) is a conceptual diagram schematically showing a side view of theheat exchange device 1. As shown inFIGS. 1 (a) and 1 (b), theheat exchange device 1 comprises a plurality ofnarrow tubes 2 made of metal such as aluminum, and theheat exchange device 1 is adapted to exchange the heat between afirst heat medium 3 or asecond heat medium 4 flowing through thetubes 2 and another heat medium held in theheat exchange device 1. Specifically, thefirst heat medium 3 is a cooling medium functioning as a thermal input medium, and thesecond heat medium 4 is brine functioning as a thermal output medium. In the example to be explained hereinafter, thefirst heat medium 3 is used to flow into thetubes 2. - The
tubes 2 are gathered and both ends thereof are aligned. The end portions of thetubes 2 are individually inserted tightly in a connectingpipe 5 to be contacted with each other, and fixed with an inner circumference of the connectingpipe 5 by a brazing method or the like. Thus, the end portions of thetubes 2 are individually held in the connectingpipe 5 liquid tightly and air tightly. - As shown in
FIGS. 1 (a) and 1 (b), a diameter of the connectingpipe 5 is expanded at the side of holding thetubes 2. In other words, a diameter of the connectingpipe 5 is reduced at the side of extension. Therefore, a positional accuracy of the leading ends of thetubes 2 can be improved when fitting thetubes 2 into the connectingpipe 5. - The
heat exchange device 1 is depicted in more detail inFIGS. 2 and 3 . As shown inFIGS. 2 and 3 , the plurality ofnarrow pipes 2 are held in acore 6 at certain intervals, and a heat medium other than thefirst heat medium 3 is also held in thecore 6. Alternatively, thecore 6 may also be adapted to allow thesecond heat medium 4 around theheat exchange device 1 flowing into thecore 6. Therefore, heat is exchanged between thefirst heat medium 3 and said other heat medium or thesecond heat medium 4. - An outer shape of the
core 6 should not be limited to a specific shape. Specifically, as shown inFIG. 2 , a shape of an intermediate portion of thecore 6 may be a rectangular column. In this case, each face of both ends of thecore 6 is inclined toward the connectingpipe 5 to reduce the diameter of thecore 6 gradually, and a leading end of thecore 6 is inserted into the connectingpipe 5. Alternatively, as shown inFIG. 3 , a shape of an intermediate portion of thecore 6 is a cylinder. In this case, the diameter of thecore 6 is reduced gradually toward the connectingpipes 5 at both ends thereof. That is, the end shape of thecore 6 is a circular cone to be inserted into the connectingpipe 5. - An example of attaching the
heat exchange device 1 to aheader 7 is shown inFIGS. 4 (a) and (b). As described, thetubes 2 are held in thecore 6 of theheat exchanger 1, and the leading end of thetubes 2 is inserted into the connectingpipe 5. As shown inFIG. 4 (b), one or more hole(s) 8 is/are formed by pressing or the like. In case the hole 8 is formed by burring, a circular flange 9 is formed around the hole 8. The connectingpipe 5 is inserted into the hole 8 and held by the circular flange 9. Therefore, the connectingpipe 5 can be fitted in the hole 8 certainly. As described, brazing alloy is applied to the connection between thetubes 2 and the connectingpipe 5. Therefore, both of the connections between thetubes 2 and the connectingpipe 5 and between the hole 8 and the connectingpipe 5 are fixed by heating the integratedheat exchange device 1 and theheader 7 in a furnace. Thus, theheat exchange device 1 and theheader 7 can be integrated easily without requiring any specific tool to hold thecore 6 in the furnace. - Examples of assembling the plurality of
heat exchange devices 1 and theheaders 7 are shown inFIGS. 5 and 6 . As described, a plurality of holes 8 is formed on one of the surfaces of theheader 7, and the connectingpipes 5 of theheat exchange devices 1 are individually inserted therein. As shown inFIGS. 5 and 6 , theheaders 7 are attached to both of the connectingpipes 5, in other words, theheaders 7 are attached to both ends of theheat exchange device 1. - Specifically, the
header 7 is a hollow structured plate material, and the connectingpipe 5 and theheader 7 are communicated with each other. Therefore, thesecond heat medium 4 flowing in thehearer 7 is allowed to flow into thetubes 2 via the connectingpipe 5. As explained above, the plurality ofheat exchange devices 1 holding the plurality oftubes 2 is attached to theheader 7. Therefore, thefirst heat medium 3 is allowed to flow into large number of thetubes 2. - According to the examples shown in
FIGS. 5 and 6 , thesecond heat medium 4 intervenes in a space among theheat exchange devices 1. Therefore, the heat is exchanged between thefirst heat medium 3 flowing through thetubes 2 and thesecond heat medium 4 existing around theheat exchange device 1 through another heat medium held in thecore 6 or through thesecond heat medium 4 flowing into thecore 6. In case the heat is exchanged between thefirst heat medium 3 and said another heat medium, the heat is transmitted from thefirst heat medium 3 to said another heat medium, and then, transmitted from said another heat medium to thesecond heat medium 4. In addition, as described, the shape of thecore 6 should not be limited to the specific shape such as cylinder or column. - An example of accommodating the
heat exchange devices 1 and theheaders 7 in acasing 10 is shown inFIGS. 7 and 8 . In addition, thecasing 10 holds thesecond heat medium 4 therein. As described, theheader 7 and thetubes 2 are communicated with each other through the connectingpipe 5. Therefore, thefirst heat medium 3 or thesecond heat medium 4 flowing thorough theheader 7 is allowed to flow into thetubes 2 via the connectingpipe 5. As also described, both of the connectingpipes 5 of both ends of theheat exchange device 1 are connected individually with theheader 7. Therefore, thefirst heat medium 3 or thesecond heat medium 4 flowing thorough one of theheaders 7 is allowed to flow into theother header 7 through the connectingpipes 5 and thetubes 2. - Next, here will be explained a manufacturing method of the
heat exchange devices 1 with reference toFIGS. 9 (a), (b) and (c). Specifically,FIG. 9 (a) schematically shows a step of inserting the plurality ofnarrow pipes 2 into the connectingpipe 5. First of all, although not especially shown, the plurality ofnarrow tubes 2 having a predetermined diameter are formed simultaneously while being aligned parallel to each other. Both ends of thetubes 2 are aligned and gathered. Alternatively, although not especially shown, thetubes 2 may also be formed one by one. In this case, thetubes 2 are placed in a mold to align end portions thereof. - Then, the end portions of the
tubes 2 thus aligned and gathered are inserted individually into the connectingpipe 5. In other words, the connectingpipe 5 is fitted on an outer face of each end of thetubes 2. As explained above, the inner diameter of the connectingpipe 5 is larger at the side to which thetubes 2 are inserted, and smaller at the other side to which thetubes 2 are not inserted. - As shown in
FIG. 9 (b), after inserting the end portion of thetubes 2 into the connectingpipe 5, a portion of the connectingpipe 5 where end portions of thetubes 2 and the connecting pipe are overlapped is tightened by atool 11 a. Then, atool 11 b is fixedly attached to the other side of the connectingpipe 5, that is, to a portion of the connectingpipe 5 not holding thetubes 2. After that, thetool 11 b is moved in a direction toward the end portion of the connectingpipe 5 not holding thetubes 2. As a result, the tapered portion of the connectingpipe 5 is elongated in its axial direction. In this situation, the inner diameter of the connectingpipe 5 is reduced so that thetubes 2 inserted therein are tightened. This procedure of fixing thetubes 2 with theconnection pipe 5 is also applied to other end portion of thetubes 2. Thus, a number of fixing tools to be used during the procedure of forming thecore 6 can be reduced so that procedure of forming thecore 6 can be simplified. - After thus tightening the connecting
pipe 5 holding thetubes 2, a brazing alloy is applied to a portion of thetubes 2 in the vicinity of the connectingpipe 5 holding thetubes 2, and theheat exchange device 1 is heated in the furnace. As shown inFIG. 9 (c), a clearance still exists among thetubes 2 even after tightened in the connectingpipe 5. Therefore, the brazing alloy heated in the furnace is allowed to enter into the clearance among thetubes 2. As a result, thetubes 2 are brazed with the connectingpipe 5, and the clearance among thetubes 2 is sealed by the brazing alloy. Thus, no specific fixing tools or the like is required during the procedure of brazing thetubes 2 with the connectingpipe 5 so that the brazing procedure can be simplified. - The connecting
pipe 5 is then inserted into the hole 8 formed on the surface of theheader 7. As described, a plurality of the holes 8 is formed on one of the surfaces of theheader 7. Therefore, a plurality of the heat exchange devices can be attached to theheader 7. For this reason, the heat exchange device excellent in heat exchange capacity can be manufactured by the method of the present invention. - Next, another example of the manufacturing method of the heat exchange device will be explained hereinafter with reference to
FIG. 10 . As shown inFIG. 10 , the connectingpipe 5 to be used in this method comprises aprotrusion 12 on its inner surface. Therefore, the end portion of thetubes 2 inserted into the connectingpipe 5 is tightened by theprotrusion 12. Here, the forming procedure of thetubes 2 is identical to that in the aforementioned manufacturing method, so further explanation about the forming of thetubes 2 is omitted. - Then, a brazing alloy is applied to a portion of the
tubes 2 in the vicinity of the connectingpipe 5 holding thetubes 2, and theheat exchange device 1 is heated in the furnace. As described, a clearance still exists among thetubes 2 even after tightened in the connectingpipe 5. Therefore, the brazing alloy heated in the furnace is allowed to enter into the clearance among thetubes 2. As a result, thetubes 2 are brazed with the connectingpipe 5, and the clearance among thetubes 2 is sealed by the brazing alloy. Thus, according to this manufacturing method, the tool for tightening theconnection pipe 5 with thetubes 2 can be reduced. Therefore, the manufacturing method can be simplified.
Claims (11)
1. A heat exchange device, comprising: a first heat medium and a second heat medium exchanging heat mutually; and a plurality of narrow tubes for letting through one of the heat media; wherein:
end portions of the plurality of narrow tubes is gathered to seal a clearance among the tubes liquid-tightly or air-tightly; and
the gathered ends of the narrow tubes are fitted into a connecting pipe whose diameter is larger than that of the gathered tubes liquid-tightly or air-tightly; and
an inner diameter of an end portion of the connecting pipe to which the narrow tubes are fitted is larger than that of the other end portion thereof.
2. The heat exchange device as set forth in claim 1 , further comprising:
a hollow header; and
a plurality of holes formed on one of the surfaces of the header;
wherein the connecting pipe is fitted into the hole liquid-tightly or air-tightly.
3. A method for manufacturing a heat exchange device having a plurality of narrow tubes, comprising:
gathering end portions of the plurality of narrow tubes to seal a clearance among the narrow tubes liquid-tightly or air-tightly; and
fitting the gathered ends of the narrow tubes into a connecting pipe while contracting the connecting pipe diametrically.
4. The method for manufacturing a heat exchange device as set forth in claim 3 , comprising:
contracting the connecting pipe diametrically by stretching the connecting pipe in its axial direction, after fitting the gathered end of the narrow tubes into the connecting pipe.
5. The method for manufacturing a heat exchange device as set forth in claim 3 , wherein:
after fitting the gathered end of the narrow tubes into the connecting pipe, the connecting pipe is contracted diametrically by applying a tension in an axial direction of the connecting pipe.
6. The method for manufacturing a heat exchange device as set forth in claim 3 , comprising:
fitting the connecting pipe into a hole formed on a surface of a header.
7. The method for manufacturing a heat exchange device as set forth in claim 6 , wherein:
the hole comprises a circular flange for holding the connecting pipe fitted therein tightly.
8. The method for manufacturing a heat exchange device as set forth in claim 4 , comprising:
fitting the connecting pipe into a hole formed on a surface of a header.
9. The method for manufacturing a heat exchange device as set forth in claim 5 , comprising:
fitting the connecting pipe into a hole formed on a surface of a header.
10. The method for manufacturing a heat exchange device as set forth in claim 8 , wherein:
the hole comprises a circular flange for holding the connecting pipe fitted therein tightly.
11. The method for manufacturing a heat exchange device as set forth in claim 9 , wherein:
the hole comprises a circular flange for holding the connecting pipe fitted therein tightly.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007098358A JP2008256253A (en) | 2007-04-04 | 2007-04-04 | Heat exchanger and manufacturing method of heat exchanger |
JP2007-098358 | 2007-04-04 | ||
PCT/JP2008/056731 WO2008123599A1 (en) | 2007-04-04 | 2008-03-28 | Heat exchanger, and method for manufacturing the heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100116483A1 true US20100116483A1 (en) | 2010-05-13 |
Family
ID=39831056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/593,003 Abandoned US20100116483A1 (en) | 2007-04-04 | 2008-03-28 | Heat exchange device and method of manufacturing the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100116483A1 (en) |
EP (1) | EP2138795A1 (en) |
JP (1) | JP2008256253A (en) |
CN (1) | CN101652621A (en) |
WO (1) | WO2008123599A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012014825A1 (en) * | 2012-07-27 | 2014-01-30 | Schmöle GmbH | Surface heat exchanger element has support plate and pipe line system which is thermally connected with support plate under utilization of heat transfer elements, such as heat conducting foils in partial manner |
CN107178796A (en) * | 2017-06-27 | 2017-09-19 | 杨全瑞 | A kind of radiating stove radiating combustion chamber of heat from wind |
US20190301808A1 (en) * | 2016-12-13 | 2019-10-03 | The Texas A&M University System | Sensible and Latent Heat Exchangers with Particular Application to Vapor-Compression Desalination |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011129625A (en) * | 2009-12-16 | 2011-06-30 | Toppan Printing Co Ltd | Resin material for electronic apparatus housing, and electronic apparatus housing |
JP5802006B2 (en) * | 2010-11-22 | 2015-10-28 | 株式会社日本イトミック | Heat exchanger and connection method thereof |
EP2584301B1 (en) * | 2011-10-19 | 2014-08-13 | WS-Wärmeprozesstechnik GmbH | High temperature heat exchanger |
JP6194700B2 (en) * | 2013-08-30 | 2017-09-13 | 富士通株式会社 | Radiator and method of manufacturing radiator |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60259898A (en) * | 1984-05-29 | 1985-12-21 | Nippon Valqua Ind Ltd | Heat exchanger made from fluorine resin and manufacture thereof |
JPS6221524A (en) * | 1985-07-23 | 1987-01-29 | Nichias Corp | Manufacture of synthetic resin tube bundle for heat exchanger |
JPS63167083U (en) * | 1987-04-17 | 1988-10-31 | ||
JPS641520A (en) * | 1987-06-24 | 1989-01-05 | Nippon Valqua Ind Ltd | Manufacture of bundle of tubes |
JPS6474471A (en) * | 1987-09-17 | 1989-03-20 | Fujitsu Ltd | Diagnostic system |
JPH01178483A (en) * | 1988-01-11 | 1989-07-14 | Hitachi Ltd | Printing density control system |
JPH01178483U (en) * | 1988-06-06 | 1989-12-20 | ||
JPH0387076A (en) * | 1989-08-30 | 1991-04-11 | Nec Corp | Piezoelectric actuator and manufacture thereof |
JP2876548B2 (en) * | 1993-07-30 | 1999-03-31 | 新日本製鐵株式会社 | Gas separator |
JP3017683B2 (en) * | 1996-07-15 | 2000-03-13 | 日本ピラー工業株式会社 | Heat exchanger |
JP2005233597A (en) | 2004-01-19 | 2005-09-02 | Daikin Ind Ltd | Heat storage heat exchanger |
JP2006145130A (en) * | 2004-11-22 | 2006-06-08 | Matsushita Electric Ind Co Ltd | Heat exchanger, and its manufacturing method |
-
2007
- 2007-04-04 JP JP2007098358A patent/JP2008256253A/en active Pending
-
2008
- 2008-03-28 CN CN200880011108A patent/CN101652621A/en active Pending
- 2008-03-28 US US12/593,003 patent/US20100116483A1/en not_active Abandoned
- 2008-03-28 EP EP08739838A patent/EP2138795A1/en not_active Withdrawn
- 2008-03-28 WO PCT/JP2008/056731 patent/WO2008123599A1/en active Application Filing
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012014825A1 (en) * | 2012-07-27 | 2014-01-30 | Schmöle GmbH | Surface heat exchanger element has support plate and pipe line system which is thermally connected with support plate under utilization of heat transfer elements, such as heat conducting foils in partial manner |
US20190301808A1 (en) * | 2016-12-13 | 2019-10-03 | The Texas A&M University System | Sensible and Latent Heat Exchangers with Particular Application to Vapor-Compression Desalination |
CN107178796A (en) * | 2017-06-27 | 2017-09-19 | 杨全瑞 | A kind of radiating stove radiating combustion chamber of heat from wind |
Also Published As
Publication number | Publication date |
---|---|
EP2138795A1 (en) | 2009-12-30 |
CN101652621A (en) | 2010-02-17 |
WO2008123599A1 (en) | 2008-10-16 |
JP2008256253A (en) | 2008-10-23 |
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