EP1314938B1 - Heat exchanger for stirling refrigerating machine, heat exchanger body, and method of manufacturing heat exchanger body - Google Patents

Heat exchanger for stirling refrigerating machine, heat exchanger body, and method of manufacturing heat exchanger body Download PDF

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Publication number
EP1314938B1
EP1314938B1 EP01963405A EP01963405A EP1314938B1 EP 1314938 B1 EP1314938 B1 EP 1314938B1 EP 01963405 A EP01963405 A EP 01963405A EP 01963405 A EP01963405 A EP 01963405A EP 1314938 B1 EP1314938 B1 EP 1314938B1
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EP
European Patent Office
Prior art keywords
corrugate fin
heat exchanger
linear
annular
endmost
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01963405A
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German (de)
English (en)
French (fr)
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EP1314938A1 (en
EP1314938A4 (en
Inventor
Hitoshi Mochizuki
Yoshiaki Ogura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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Filing date
Publication date
Priority claimed from JP2000265231A external-priority patent/JP3563679B2/ja
Priority claimed from JP2001042118A external-priority patent/JP3563703B2/ja
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of EP1314938A1 publication Critical patent/EP1314938A1/en
Publication of EP1314938A4 publication Critical patent/EP1314938A4/en
Application granted granted Critical
Publication of EP1314938B1 publication Critical patent/EP1314938B1/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/055—Heaters or coolers
    • 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
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/105—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being corrugated elements extending around the tubular elements
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • the present invention relates to a heat exchanger member, such as a heat absorber or heat rejector, provided in a Stirling cycle refrigerator, to a heat exchanger element for use in such a heat exchanger member, and to a method of manufacturing such a heat exchanger member.
  • a heat exchanger member such as a heat absorber or heat rejector
  • Fig. 29 is a diagram schematically showing a section, as seen from the side, of a free-piston-type Stirling cycle refrigerator.
  • a heat absorber 2 acting as a low-temperature portion, a regenerator 3, and a heat rejector 4 acting as a high-temperature portion are arranged in this order.
  • the heat absorber 2 and the heat rejector 4 are each built as a heat exchanger member composed of a tubular body 21 or 41 having a heat exchanger element 22 or 42 fitted on the inner surface thereof at one end.
  • the heat exchanger elements 22 and 42 are each contiguous to the regenerator 3.
  • a displacer 6 Inside the cylinder 1 are also arranged a displacer 6 firmly fitted to one end of a displacer rod 5, and a piston 7 through which the displacer rod 5 is placed. The other end of the displacer rod 5 is connected to a spring 8. Inside the cylinder 1, the displacer 6 and the piston 7 create an expansion space 9 in the heat absorber 2 and a compression space 10 in the heat rejector 4. The expansion space 9 and the compression space 10 communicate with each other through the regenerator 3, and thereby form a closed circuit.
  • the piston 7 is made to reciprocate along the axis of the cylinder 1 with a predetermined period by an external power source, such as a linear motor (not shown).
  • the compression space 10 is filled with working gas, such as helium, beforehand.
  • the working gas in the compression space 10 is compressed. This causes the working gas to flow through the heat exchanger element 42 then through the regenerator 3 into the expansion space 9 (as indicated by broken-line arrows A in the figure). Meanwhile, the working gas first releases heat in the heat rejector 4, by exchanging the heat produced therein as a result of compression with the air outside, and is then precooled as it passes through the regenerator 3, by receiving the cold accumulated in the regenerator 3 beforehand.
  • the working gas in the expansion space 9 flows through the heat exchanger element 22 of the heat absorber 2 and then through the regenerator 3 back to the compression space 10 (as indicated by solid-line arrows A'). Meanwhile, the working gas first absorbs heat in the heat exchanger element 22, by exchanging heat with the air outside, and is then preheated as it passes through the regenerator 3, by receiving the heat accumulated in the regenerator 3 beforehand. The working gas back in the compression space 10 is then compressed again by the piston 7.
  • cryogenic cold is obtained in the heat absorber 2.
  • this heat exchanger element 42 is built as an annular corrugate fin 421 produced by forming a corrugated sheet material into a cylindrical shape.
  • the heat exchanger element 42 has a rugged surface, with a large number of axially-extending straight V-shaped grooves 421a formed at regular intervals.
  • the portions of the heat exchanger element 42 which protrude toward the center of the body 41 of the heat rejector 4 are referred to as the bottoms 421b of the individual grooves 421a, and the portions of the heat exchanger element 42 which protrude toward the inner surface of the body 41 are referred to as the tops 421c between every two adjacent grooves 421a.
  • the diameter of the circle formed by smoothly connecting all the tops 421c together i.e. the external diameter of the annular corrugate fin 421
  • the body 41 and the annular corrugate fin 421 are arranged so as to be coaxial with each other.
  • Fig. 31 is an enlarged view of a portion of the annular corrugate fin 421 as seen axially, and shows how it is fixed with adhesive.
  • adhesive 11 is applied thinly to the inner surface of the body 41, and then the annular corrugate fin 421 is inserted into the body 41. Then, with the annular corrugate fin 421 held in the desired position for a while, the adhesive 11 is dried.
  • Fig. 32 shows how the annular corrugate fin 421 is fixed with solder.
  • the annular corrugate fin 421 is inserted into the body 41. Then, with the annular corrugate fin 421 held in the desired position, solder 12 is applied to where the inner surface of the body 41 makes contact with or comes close to the tops 421c of the annular corrugate fin 421.
  • Attached fixing the annular corrugate fin and the inner ring-shaped member helps increase the area of contact between them and thereby enhance heat conductivity. Moreover, their integration makes the handling of the heat exchanger element easy, and makes the repair, by replacement, of the heat exchanger element possible. This makes the heat exchanger element very economical and recycable.
  • the integration is achieved by a bonding means, such as brazing or soldering.
  • a heat exchanger member according to the present invention is produced by inserting a heat exchanger element for a Stirling cycle refrigerator into a hollow portion of a tubular body.
  • the internal diameter of the body may be made slightly smaller than the external diameter of the heat exchanger element. This makes it possible to fit the heat exchanger element into the body by press fitting, i.e. without bonding or welding.
  • at least one end of the body may be tapered so that the wall thickness of the body becomes smaller toward that end along the axis. This permits easy insertion of the heat exchanger element into the body.
  • wave-shaped projections may be formed so as to be in close contact with one another and at regular intervals overall, with wave-shaped depressions formed in the inner surface of the body so as to extend axially and correspond to the wave-shaped projections, so that, when the heat exchanger element is inserted into the body, the wave-shaped projections fit into the wave-shaped depressions. This prevents the heat exchanger element from rotating out of position inside the body.
  • the annular corrugate fin may be produced by forming a linear corrugate fin, of which the endmost sides of the inverted-V-shaped grooves at both ends are longer than the slant sides of the V-shaped grooves in between, into a cylindrical shape, then holding the endmost sides together so that the surfaces of those endmost sides are kept in contact with each other, and then fitting the resulting protruding portion that is formed at the tip of the endmost sides so as to protrude radially out of the outer periphery of the annular corrugate fin into a groove that is formed in the inner surface of the body so as to extend axially. This also prevents the heat exchanger element from rotating out of position inside the body.
  • This heat exchanger member can be manufactured, for example, by removably putting to the body one end of a tubular guide member tapered so that the internal diameter thereof at one end is substantially equal to the internal diameter of the body and that the wall thickness thereof becomes smaller toward another end, and then inserting the heat exchanger element for a Stirling cycle refrigerator into the body by guiding it through the guide member axially from the other end thereof.
  • the heat exchanger member manufactured in this way when the annular corrugate fin is guided through the guide member, its peripheral shape changes, increasing the area of contact with the inner surface of the body. This enhances the heat conduction efficiency of the annular corrugate fin, and thus makes it possible to realize a heat exchanger member excellent in heat exchange performance.
  • a heat exchanger member according to the present invention is produced by inserting the above-described heat exchanger element for a Stirling cycle refrigerator into a hollow portion of a tubular body.
  • the internal diameter of the body is made slightly smaller than the external diameter of the heat exchanger element. This makes it possible to fit the heat exchanger element into the body by press fitting, i.e. without bonding or welding.
  • at least one end of the body may be tapered so that the wall thickness of the body becomes smaller toward that end along the axis. This permits easy insertion of the heat exchanger element into the body.
  • the aforementioned annular corrugate fin is produced easily by forming a linear corrugate fin, having contiguous V-shaped grooves, into a cylindrical shape, and then engaging the endmost side of the V-shaped groove at one end of the linear corrugate fin with the endmost side of the inverted V-shaped groove at the other end thereof.
  • the annular corrugate fin is produced by forming a linear corrugate fin, having contiguous V-shaped grooves, into a cylindrical shape, and then coupling together the endmost side of the V-shaped groove at one end of the linear corrugate fin and the endmost side of the inverted-V-shaped groove at the other end thereof by performing spot welding on the surfaces of those endmost sides.
  • the annular corrugate fin is produced by forming a linear corrugate fin, having contiguous V-shaped grooves, into a cylindrical shape, and then coupling together the endmost side of the V-shaped groove at one end of the linear corrugate fin and the endmost side of the inverted-V-shaped groove at the other end thereof by bonding the surfaces of those endmost sides together.
  • the annular corrugate fin is produced by forming a linear corrugate fin, having contiguous V-shaped grooves, into a cylindrical shape, and then coupling together the endmost side of the V-shaped groove at one end of the linear corrugate fin and the endmost side of the inverted-V-shaped groove at the other end thereof by brazing the surfaces of those endmost sides together.
  • the annular corrugate fin is produced by forming a linear corrugate fin, having contiguous V-shaped grooves, into a cylindrical shape, then holding the endmost sides of the inverted-V-shaped grooves at both ends of the linear corrugate fin together so that the surfaces of those endmost sides are kept in contact with each other, and then fitting a coupling member having a C-shaped section on the tip ofthose endmost sides of which the surfaces are kept in contact with each other.
  • the annular corrugate fin is produced by forming a linear corrugate fin, having contiguous V-shaped grooves, into a cylindrical shape, and then coupling together the endmost sides of the inverted-V-shaped grooves at both ends of the linear corrugate fin by engaging together a slit that is formed in the endmost side at one end of the linear corrugate fin so as to extend from one flank halfway inward and a slit that is formed in the endmost side at the other end of the linear corrugate fin so as to extend from another flank halfway inward.
  • Fig. 1 is an external perspective view of the heat rejector 4 serving as a heat exchanger member in this embodiment.
  • Figs. 2A and 2B are an external perspective view and an exploded perspective view, respectively, of the heat exchanger element 42 of the heat rejector 4.
  • Fig. 3 is an enlarged plan view of a portion of the heat rejector, as seen axially.
  • This heat exchanger element 42 is composed of an annular corrugate fin 421 and an inner ring-shaped member 422.
  • the annular corrugate fin 421 is produced by forming a corrugated sheet material into a cylindrical shape with the individual grooves 421a thereof parallel to the axis of the cylindrical shape.
  • the inner ring-shaped member 422 is a cylindrical member made of a material having good thermal conductivity.
  • FIGs. 6A to 6C show the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 6A is a plan view of a linear corrugate fin 420
  • Fig. 6B is an enlarged plan view of the linear corrugate fin 420 in a rounded state with both ends thereof brought close together
  • Fig. 6C is an enlarged plan view of the annular corrugate fin 421 in its finished state.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At one end of the linear corrugate fin 420 is a V-shaped groove 420a, and at the other end thereof is an inverted-V-shaped groove 420b.
  • the endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 1 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 6A so as to be formed into a cylindrical shape. With the endmost sides 420c and 420d brought close together as shown in Fig. 6B, those endmost sides 420c and 420d are hooked on each other as shown in Fig. 6C, and thereby the annular corrugate fin 421 is formed. Thus, as the annular corrugate fin 421 tends to return to its original linear state, the endmost sides 420c and 420d so hooked on each other pull against each other, and thereby the annular shape of the annular corrugate fin 421 is maintained.
  • Reference numeral 421d represents the coupled portion.
  • the inner ring-shaped member 422 is placed in contact with the inner periphery of the annular corrugate fin 421 so that they are coaxial with each other (i.e. so that their axes coincide with each other).
  • the diameter of the circle formed by smoothly connecting all the bottoms 421b of the annular corrugate fin 421 i.e. the internal diameter of the annular corrugate fin 421 is made substantially equal to the external diameter of the inner ring-shaped member 422.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together with a ring-shaped brazing metal 13. Specifically, as Fig. 2B shows, the brazing metal 13 is placed where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other and is heated so that the molten brazing metal 13 flows down along the bottoms 421b of the annular corrugate fin 421.
  • the brazing metal 13 is applied substantially evenly to where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other.
  • the brazing metal 13 hardens, the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together and thereby integrated together.
  • soldering or the like may be used.
  • the heat exchanger element 42 described above is inserted into a body 41 shown in Fig. 1 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42 is inserted into the body 41 by the following mechanism. As shown in Fig. 4, which is a sectional outline of the body 41 and the heat exchanger element 42, both ends of the body 41 are tapered so that the wall thickness thereof becomes smaller towards the ends along the axis thereof (these portions are referred to as the tapered portions 41a).
  • the heat exchanger element 42 when the heat exchanger element 42 is inserted into the heat exchanger element 42 from one end thereof, the insertion requires a small force at first. Since the internal diameter of the body 41 gradually becomes smaller until it eventually becomes smaller than the external diameter R 1 of the heat exchanger element 42, as the heat exchanger element 42 is inserted, the force required to do so gradually increases. In this way, the heat exchanger element 42 can be inserted into the body 41 easily.
  • the annular corrugate fin 421 thus fitted into the body 41, of which the internal diameter R 3 is smaller than the external diameter R1 of the annular corrugate fin 421, is brought into a state in which the grooves 421a are so pressed as to be wider open, and this produces a resilient force acting radially outward.
  • the aforementioned resilient force presses the heat exchanger element 42 onto the inner surface of the body 41 with a uniform force all around and thereby keeps it in position.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are firmly fixed together, and thus are not deformed.
  • the inner ring-shaped member 422 can be fixed in the desired position inside the body 41 without the use of adhesive or solder. This helps simplify the manufacturing procedure and reduce the manufacturing cost, and also stabilize the heat exchange performance of the heat exchanger member.
  • the heat exchanger element 42 can be taken out of and removed from the body 41. This permits easy replacement as required, and thus helps alleviate the economic burden on the user in the event of repair and solve recycling problems.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing, soldering, or the like, and thus exhibit better thermal conductivity than where they are left unintegrated. This helps increase heat exchange efficiency.
  • Fig. 7 is an enlarged plan view of the heat rejector 4 of this embodiment, as seen axially.
  • the heat rejector 4 of this embodiment is composed of a heat exchanger element 42, consisting of an annular corrugate fin 421 and an inner ring-shaped member 422 brazed inside it, and a body 41 into which the heat exchanger element 42 is fitted.
  • FIGs. 8A to 8C show the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 8A is a plan view of the linear corrugate fin 420
  • Fig. 8B is an enlarged plan view of the linear corrugate fin 420 in a rounded state with both ends thereof brought close together
  • Fig. 8C is an enlarged plan view of a portion of the annular corrugate fin 421 in its finished state.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At one end of the linear corrugate fin 420 is a V-shaped groove 420a, and at the other end thereof is an inverted-V-shaped groove 420b.
  • the endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 2 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 8A so as to be formed into a cylindrical shape. With the endmost sides 420c and 420d brought close together as shown in Fig. 8B, spot welding is performed on parts of the surfaces of those endmost sides 420c and 420d so that these surfaces are joined together while they are kept in contact with each other. In this way, the annular corrugate fin 421 as shown in Fig. 8C is produced.
  • Reference numeral 421e represents the brazed or welded portion.
  • the inner ring-shaped member 422 is placed in contact with the inner periphery of the annular corrugate fin 421 so that they are coaxial with each other.
  • the diameter of the circle formed by smoothly connecting all the bottoms 421b of the annular corrugate fin 421 i.e. the internal diameter of the annular corrugate fin 421 is made substantially equal to the external diameter of the inner ring-shaped member 422.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together with a ring-shaped brazing metal 13. Specifically, as Fig. 2B shows, the brazing metal 13 is placed where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other and is heated so that the molten brazing metal 13 flows down along the bottoms 421b of the annular corrugate fin 421.
  • the brazing metal 13 is applied substantially evenly to where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other.
  • the brazing metal 13 hardens, the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together and thereby integrated together.
  • soldering or the like may be used.
  • the heat exchanger element 42 described above is inserted into a body 41 shown in Fig. 1 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42 is inserted into the body 41 by the following mechanism. As shown in Fig. 4, which is a sectional outline of the body 41 and the heat exchanger element 42, both ends of the body 41 are tapered so that the wall thickness thereof becomes smaller towards the ends along the axis thereof (these portions are referred to as the tapered portions 41a).
  • the heat exchanger element 42 when the heat exchanger element 42 is inserted into the heat exchanger element 42 from one end thereof, the insertion requires a small force at first. Since the internal diameter of the body 41 gradually becomes smaller until it eventually becomes smaller than the external diameter R 1 of the heat exchanger element 42, as the heat exchanger element 42 is inserted, the force required to do so gradually increases. In this way, the heat exchanger element 42 can be inserted into the body 41 easily.
  • the annular corrugate fin 421 thus fitted into the body 41, of which the internal diameter R 3 is smaller than the external diameter R1 of the annular corrugate fin 421, is brought into a state in which the grooves 421a are so pressed as to be wider open, and this produces a resilient force acting radially outward.
  • the aforementioned resilient force presses the heat exchanger element 42 onto the inner surface of the body 41 with a uniform force all around and thereby keeps it in position.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are firmly fixed together, and thus are not deformed.
  • the inner ring-shaped member 422 can be fixed in the desired position inside the body 41 without the use of adhesive or solder. This helps simplify the manufacturing procedure and reduce the manufacturing cost, and also stabilize the heat exchange performance of the heat exchanger member.
  • the heat exchanger element 42 can be taken out of and removed from the body 41. This permits easy replacement as required, and thus helps alleviate the economic burden on the user in the event of repair and solve recycling problems.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing, soldering, or the like, and thus exhibit better thermal conductivity than where they are left unintegrated. This helps increase heat exchange efficiency.
  • Fig. 9 is a plan view of a portion of the heat rejector 4 of this embodiment, as seen axially.
  • the heat rejector 4 of this embodiment is composed of a heat exchanger element 42, consisting of an annular corrugate fin 421 and an inner ring-shaped member 422 brazed inside it, and a body 41 into which the heat exchanger element 42 is fitted.
  • FIGs. 10A and 10B show the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 10A is a plan view of the linear corrugate fin 420
  • Fig. 10B is an enlarged plan view of the linear corrugate fin 420 in a rounded state with both ends thereof brought close together
  • Fig. 10C is an enlarged plan view of a portion of the annular corrugate fin 421 in its finished state.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At one end of the linear corrugate fin 420 is a V-shaped groove 420a, and at the other end thereof is an inverted-V-shaped groove 420b.
  • the endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 3 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 10A so as to be formed into a cylindrical shape so that the endmost sides 420c and 420d are put together (Fig. 10B). Then, the surfaces of those endmost sides 420c and 420d, to which adhesive 16 such as instant adhesive has been applied beforehand, are held in contact with each other for a while so that they are bonded together. In this way, the annular corrugate fin 421 as shown in Fig. 10C is produced.
  • Reference numeral 421f represents the bonded portion.
  • the inner ring-shaped member 422 is placed in contact with the inner periphery of the annular corrugate fin 421 so that they are coaxial with each other.
  • the diameter of the circle formed by smoothly connecting all the bottoms 421b of the annular corrugate fin 421 i.e. the internal diameter of the annular corrugate fin 421 is made substantially equal to the external diameter of the inner ring-shaped member 422.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together with a ring-shaped brazing metal 13. Specifically, as Fig. 2B shows, the brazing metal 13 is placed where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other and is heated so that the molten brazing metal 13 flows down along the bottoms 421b of the annular corrugate fin 421.
  • the brazing metal 13 is applied substantially evenly to where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other.
  • the brazing metal 13 hardens, the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together and thereby integrated together.
  • soldering or the like may be used.
  • the heat exchanger element 42 described above is inserted into a body 41 shown in Fig. 1 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42 is inserted into the body 41 by the following mechanism. As shown in Fig. 4, which is a sectional outline of the body 41 and the heat exchanger element 42, both ends of the body 41 are tapered so that the wall thickness thereof becomes smaller towards the ends along the axis thereof (these portions are referred to as the tapered portions 41a).
  • the heat exchanger element 42 when the heat exchanger element 42 is inserted into the heat exchanger element 42 from one end thereof, the insertion requires a small force at first. Since the internal diameter of the body 41 gradually becomes smaller until it eventually becomes smaller than the external diameter R 1 of the heat exchanger element 42, as the heat exchanger element 42 is inserted, the force required to do so gradually increases. In this way, the heat exchanger element 42 can be inserted into the body 41 easily.
  • the annular corrugate fin 421 thus fitted into the body 41, of which the internal diameter R 3 is smaller than the external diameter R1 of the annular corrugate fin 421, is brought into a state in which the grooves 421a are so pressed as to be wider open, and this produces a resilient force acting radially outward.
  • the aforementioned resilient force presses the heat exchanger element 42 onto the inner surface of the body 41 with a uniform force all around and thereby keeps it in position.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are firmly fixed together, and thus are not deformed.
  • the inner ring-shaped member 422 can be fixed in the desired position inside the body 41 without the use of adhesive or solder. This helps simplify the manufacturing procedure and reduce the manufacturing cost, and also stabilize the heat exchange performance of the heat exchanger member.
  • the heat exchanger element 42 can be taken out of and removed from the body 41. This permits easy replacement as required, and thus helps alleviate the economic burden on the user in the event of repair and solve recycling problems.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing, soldering, or the like, and thus exhibit better thermal conductivity than where they are left unintegrated. This helps increase heat exchange efficiency.
  • Fig. 11 is a plan view of a portion of the heat rejector 4 of this embodiment, as seen axially.
  • the heat rejector 4 of this embodiment is composed of a heat exchanger element 42, consisting of an annular corrugate fin 421 and an inner ring-shaped member 422 brazed inside it, and a body 41 into which the heat exchanger element 42 is fitted.
  • Figs. 12A to 12C show the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 12A is a plan view of the linear corrugate fin 420
  • Fig. 12B is an enlarged plan view of the linear corrugate fin 420 in a rounded state with both ends thereof brought close together
  • Fig. 12C is an enlarged plan view of a portion of the annular corrugate fin 421 in its finished state.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At one end of the linear corrugate fin 420 is a V-shaped groove 420a, and at the other end thereof is an inverted-V-shaped groove 420b.
  • the endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 4 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 12A so as to be formed into a cylindrical shape so that the endmost sides 420c and 420d are put together (Fig. 12B). Then, the surfaces of those endmost sides 420c and 420d, to which solder in the form of paste has been applied uniformly beforehand, are held in contact with each other and heated for a while so that they are soldered together. In this way, the annular corrugate fin 421 as shown in Fig. 12C is produced.
  • Reference numeral 421g represents the soldered or welded portion.
  • the inner ring-shaped member 422 is placed in contact with the inner periphery of the annular corrugate fin 421 so that they are coaxial with each other.
  • the diameter of the circle formed by smoothly connecting all the bottoms 421b of the annular corrugate fin 421 i.e. the internal diameter of the annular corrugate fin 421 is made substantially equal to the external diameter of the inner ring-shaped member 422.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together with a ring-shaped brazing metal 13. Specifically, as Fig. 2B shows, the brazing metal 13 is placed where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other and is heated so that the molten brazing metal 13 flows down along the bottoms 421b of the annular corrugate fin 421.
  • the brazing metal 13 is applied substantially evenly to where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other.
  • the brazing metal 13 hardens, the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together and thereby integrated together.
  • soldering or the like may be used.
  • the heat exchanger element 42 described above is inserted into a body 41 shown in Fig. 1 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42 is inserted into the body 41 by the following mechanism. As shown in Fig. 4, which is a sectional outline of the body 41 and the heat exchanger element 42, both ends of the body 41 are tapered so that the wall thickness thereof becomes smaller towards the ends along the axis thereof (these portions are referred to as the tapered portions 41a).
  • the heat exchanger element 42 when the heat exchanger element 42 is inserted into the heat exchanger element 42 from one end thereof, the insertion requires a small force at first. Since the internal diameter of the body 41 gradually becomes smaller until it eventually becomes smaller than the external diameter R 1 of the heat exchanger element 42, as the heat exchanger element 42 is inserted, the force required to do so gradually increases. In this way, the heat exchanger element 42 can be inserted into the body 41 easily.
  • the annular corrugate fin 421 thus fitted into the body 41, of which the internal diameter R 3 is smaller than the external diameter R1 of the annular corrugate fin 421, is brought into a state in which the grooves 421a are so pressed as to be wider open, and this produces a resilient force acting radially outward.
  • the aforementioned resilient force presses the heat exchanger element 42 onto the inner surface of the body 41 with a uniform force all around and thereby keeps it in position.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are firmly fixed together, and thus are not deformed.
  • the inner ring-shaped member 422 can be fixed in the desired position inside the body 41 without the use of adhesive or solder. This helps simplify the manufacturing procedure and reduce the manufacturing cost, and also stabilize the heat exchange performance of the heat exchanger member.
  • the heat exchanger element 42 can be taken out of and removed from the body 41. This permits easy replacement as required, and thus helps alleviate the economic burden on the user in the event of repair and solve recycling problems.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing, soldering, or the like, and thus exhibit better thermal conductivity than where they are left unintegrated. This helps increase heat exchange efficiency.
  • Fig. 13 is a plan view of a portion of the heat rejector 4 of this embodiment, as seen axially.
  • the heat rejector 4 of this embodiment is composed of a heat exchanger element 42, consisting of an annular corrugate fin 421 and an inner ring-shaped member 422 brazed inside it, and a body 41 into which the heat exchanger element 42 is fitted.
  • Figs. 14A to 14C show the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 14A is a plan view of the linear corrugate fin 420
  • Fig. 14B is an enlarged plan view of the linear corrugate fin 420 in a rounded state with both ends thereof brought close together
  • Fig. 14C is an enlarged plan view of a portion of the annular corrugate fin 421 in its finished state.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At both ends of the linear corrugate fin 420 are inverted-V-shaped grooves 420b. The endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 5 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 14A so as to be formed into a cylindrical shape so that the endmost sides 420c and 420d are put together (Fig. 14B). Then, the endmost sides 420c and 420d are, with the surfaces thereof held in contact with each other over their entire surfaces, coupled together with a coupling member 18 made of a highly resilient material and having a C-shaped section. In this way, the annular corrugate fin 421 as shown in Fig. 14C is produced.
  • the inner ring-shaped member 422 is placed in contact with the inner periphery of the annular corrugate fin 421 so that they are coaxial with each other.
  • the diameter of the circle formed by smoothly connecting all the bottoms 421b of the annular corrugate fin 421 i.e. the internal diameter of the annular corrugate fin 421 is made substantially equal to the external diameter of the inner ring-shaped member 422.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together with a ring-shaped brazing metal 13. Specifically, as Fig. 2B shows, the brazing metal 13 is placed where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other and is heated so that the molten brazing metal 13 flows down along the bottoms 421b of the annular corrugate fin 421.
  • the brazing metal 13 is applied substantially evenly to where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other.
  • the brazing metal 13 hardens, the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together and thereby integrated together.
  • soldering or the like may be used.
  • the heat exchanger element 42 described above is inserted into a body 41 shown in Fig. 1 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42 is inserted into the body 41 by the following mechanism. As shown in Fig. 4, which is a sectional outline of the body 41 and the heat exchanger element 42, both ends of the body 41 are tapered so that the wall thickness thereof becomes smaller towards the ends along the axis thereof (these portions are referred to as the tapered portions 41a).
  • the heat exchanger element 42 when the heat exchanger element 42 is inserted into the heat exchanger element 42 from one end thereof, the insertion requires a small force at first. Since the internal diameter of the body 41 gradually becomes smaller until it eventually becomes smaller than the external diameter R 1 of the heat exchanger element 42, as the heat exchanger element 42 is inserted, the force required to do so gradually increases. In this way, the heat exchanger element 42 can be inserted into the body 41 easily.
  • the annular corrugate fin 421 thus fitted into the body 41, of which the internal diameter R 3 is smaller than the external diameter R1 of the annular corrugate fin 421, is brought into a state in which the grooves 421a are so pressed as to be wider open, and this produces a resilient force acting radially outward.
  • the aforementioned resilient force presses the heat exchanger element 42 onto the inner surface of the body 41 with a uniform force all around and thereby keeps it in position.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are firmly fixed together, and thus are not deformed.
  • the inner ring-shaped member 422 can be fixed in the desired position inside the body 41 without the use of adhesive or solder. This helps simplify the manufacturing procedure and reduce the manufacturing cost, and also stabilize the heat exchange performance of the heat exchanger member.
  • the heat exchanger element 42 can be taken out of and removed from the body 41. This permits easy replacement as required, and thus helps alleviate the economic burden on the user in the event of repair and solve recycling problems.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing, soldering, or the like, and thus exhibit better thermal conductivity than where they are left unintegrated. This helps increase heat exchange efficiency.
  • Fig. 15 is a plan view of a portion of the heat rejector 4 of this embodiment, as seen axially.
  • the heat rejector 4 of this embodiment is composed of a heat exchanger element 42, consisting of an annular corrugate fin 421 and an inner ring-shaped member 422 brazed inside it, and a body 41 into which the heat exchanger element 42 is fitted.
  • FIG. 16 shows the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 16A is a plan view of the linear corrugate fin 420
  • Fig. 16B is an enlarged plan view of the linear corrugate fin 420 in a rounded state with both ends thereof brought close together
  • Fig. 14C is an enlarged plan view of the annular corrugate fin 421 in its finished state.
  • Fig. 17 is a perspective view of a principal portion of Fig. 16B.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At both ends of the linear corrugate fin 420 are inverted-V-shaped grooves 420b. The endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 6 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between. Moreover, as Fig.
  • slits 19 are respectively formed in such a way that one slit extends from one flank 420g of the linear corrugate fin 420 halfway inward and the other slit extends from the other flank 420h of linear corrugate fin 420 halfway inward.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 16A so as to be formed into a cylindrical shape so that the endmost sides 420c and 420d are put together (Fig. 16B). Then, the endmost sides 420c and 420d are coupled together by engaging together the slit 19 formed in the endmost side 420c and the slit 19 formed in the endmost side 420d. In this way, the annular corrugate fin 421 as shown in Fig. 16C is produced.
  • the inner ring-shaped member 422 is placed in contact with the inner periphery of the annular corrugate fin 421 so that they are coaxial with each other.
  • the diameter of the circle formed by smoothly connecting all the bottoms 421b of the annular corrugate fin 421 i.e. the internal diameter of the annular corrugate fin 421 is made substantially equal to the external diameter of the inner ring-shaped member 422.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together with a ring-shaped brazing metal 13. Specifically, as Fig. 2B shows, the brazing metal 13 is placed where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other and is heated so that the molten brazing metal 13 flows down along the bottoms 421b of the annular corrugate fin 421.
  • the brazing metal 13 is applied substantially evenly to where the annular corrugate fin 421 and the inner ring-shaped member 422 make contact with each other.
  • the brazing metal 13 hardens, the annular corrugate fin 421 and the inner ring-shaped member 422 are joined together and thereby integrated together.
  • soldering or the like may be used.
  • the heat exchanger element 42 described above is inserted into a body 41 shown in Fig. 1 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42 is inserted into the body 41 by the following mechanism. As shown in Fig. 4, which is a sectional outline of the body 41 and the heat exchanger element 42, both ends of the body 41 are tapered so that the wall thickness thereof becomes smaller towards the ends along the axis thereof (these portions are referred to as the tapered portions 41a).
  • the heat exchanger element 42 when the heat exchanger element 42 is inserted into the heat exchanger element 42 from one end thereof, the insertion requires a small force at first. Since the internal diameter of the body 41 gradually becomes smaller until it eventually becomes smaller than the external diameter R 1 of the heat exchanger element 42, as the heat exchanger element 42 is inserted, the force required to do so gradually increases. In this way, the heat exchanger element 42 can be inserted into the body 41 easily.
  • the annular corrugate fin 421 thus fitted into the body 41, of which the internal diameter R 3 is smaller than the external diameter R1 of the annular corrugate fin 421, is brought into a state in which the grooves 421a are so pressed as to be wider open, and this produces a resilient force acting radially outward.
  • the aforementioned resilient force presses the heat exchanger element 42 onto the inner surface of the body 41 with a uniform force all around and thereby keeps it in position.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are firmly fixed together, and thus are not deformed.
  • the inner ring-shaped member 422 can be fixed in the desired position inside the body 41 without the use of adhesive or solder. This helps simplify the manufacturing procedure and reduce the manufacturing cost, and also stabilize the heat exchange performance of the heat exchanger member.
  • the heat exchanger element 42 can be taken out of and removed from the body 41. This permits easy replacement as required, and thus helps alleviate the economic burden on the user in the event of repair and solve recycling problems.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing, soldering, or the like, and thus exhibit better thermal conductivity than when they are left unintegrated. This helps increase heat exchange efficiency.
  • Fig. 18 is a plan view of the heat rejector 4 of this embodiment, as seen axially.
  • the heat rejector 4 of this embodiment is composed of a heat exchanger element 42, consisting of an annular corrugate fin 421 and an inner ring-shaped member 422 brazed inside it, and a body 41 into which the heat exchanger element 42 is fitted.
  • FIGs. 19A to 19C show the manufacturing procedure of the annular corrugate fin 421.
  • Fig. 19A is a plan view of the linear corrugate fin 420
  • Fig. 19B is a plan view of the annular corrugate fin formed by rounding the linear corrugate fin and putting both ends of thereof together
  • Fig. 19C is a top view of the cylindrical body 41.
  • the linear corrugate fin 420 has contiguous grooves 420e each having a V-shaped section. At both ends of the linear corrugate fin 420 are inverted-V-shaped grooves 420b. The endmost side 420c of the groove 420a and the endmost side 420d of the groove 420b are so formed that their length L 7 is shorter than the length L of the slant sides between the tops and bottoms 420f and 420f of the grooves 420e in between.
  • the linear corrugate fin 420 is bent in the directions indicated by arrows F1 and F2 in Fig. 19A so as to be formed into a cylindrical shape so that the endmost sides 420c and 420d are put together. Then, the linear corrugate fin 420 is held in a state in which the endmost sides 420c and 420d are kept in contact with each other at least at their tips. In this way, the annular corrugate fin 421 as shown in Fig. 19B is produced. As a result, the tip portions of the endmost sides 420c and 420d form a protruding portion 421h that protrudes radially out of the outer periphery of the annular corrugate fin 421 (i.e. the circle formed by smoothly connecting all the tops 421c).
  • the internal diameter of the cylindrical body 41 is made substantially equal to the external diameter of the annular corrugate fin 421. Moreover, as Fig. 19C shows, in one position in the inner surface of the body 41, a groove 41a into which to fit the protruding portion 421h of the annular corrugate fin 421 is formed so as to extend axially.
  • annular corrugate fin 421 is then inserted axially into the body 41 with the center of the former aligned with the center axis of the latter and with the protruding portion 421h of the former fit into the groove 41a of the latter.
  • the annular corrugate fin 421 is inserted until one end thereof becomes flush with the open end of the body 41.
  • the protruding portion 421h of the annular corrugate fin 421 acts a force that tends to bring the annular corrugate fin 421 back into the original state of the linear corrugate fin 420.
  • the force converts to a force that tends to expand the annular corrugate fin 421 radially.
  • the annular corrugate fin 421 expands radially, and is thereby pressed onto the inner surface of the body 41. This makes it possible to keep the annular corrugate fin 421 in the desired position while maintaining its shape.
  • the external diameter of the cylindrical inner ring-shaped member 422 is made substantially equal to the internal diameter of the annular corrugate fin 421 (i.e. the diameter of the circle formed by smoothly connecting all the bottoms 2b).
  • the inner ring-shaped member 422 is inserted axially into the annular corrugate fin 421 with the center of the former aligned with the center axis of the latter.
  • the annular corrugate fin 421 and the inner ring-shaped member 422 are integrated together by brazing them together at where the inner periphery of the former makes contact with the outer surface of the inner ring-shaped member 422. In this way, the heat exchanger element 42 is fitted into the body 41, and thereby the heat rejector 4 is obtained as shown in Fig. 18.
  • Fig. 20 is an external perspective view of the heat rejector 4 serving as a heat exchanger member in this embodiment.
  • Fig. 21A is an external perspective view and an exploded perspective view, respectively, of the heat exchanger element 42' incorporated in the heat rejector 4.
  • This heat exchanger element 42' is composed of an annular corrugate fin 421 and an outer ring-shaped member 422'.
  • the annular corrugate fin 421 is produced by the same procedure as described earlier in connection with the first to seventh embodiments.
  • the outer ring-shaped member 422' is a cylindrical member made of a material having good thermal conductivity and resilience.
  • the outer ring-shaped member 422' is placed in contact with the outer periphery of the annular corrugate fin 421 so that they are coaxial with each other.
  • the external diameter of the annular corrugate fin 421 is made substantially equal to the internal diameter of the outer ring-shaped member 422'.
  • the annular corrugate fin 421 and the outer ring-shaped member 422' are, like the annular corrugate fin 421 and the inner ring-shaped member 422 of the first embodiment, bonded together and fixed together with a brazing metal 13 or solder.
  • the heat exchanger element 42' described above is inserted into a body 41 shown in Fig. 20 so that they are coaxial with each other, and thereby the heat rejector 4 is produced.
  • the heat exchanger element 42' is inserted into the body 41 by the following mechanism. As shown in Fig. 23, which is a sectional outline of the body 41 and the heat exchanger element 42', both ends of the body 41 are tapered in the same way as in the first embodiment (these portions are referred to as the tapered portions 41a).
  • the external diameter of the heat exchanger element 42' i.e. the external diameter of the outer ring-shaped member 422'
  • the tapered portions 41a permit the heat exchanger element 42' to be inserted into the body 41 easily. Moreover, the heat exchanger element 42' thus fitted into the body 41 is pressed onto the inner surface of the body 41 and is thereby kept in position by the resilience that occurs in the annular corrugate fin 421 and the outer ring-shaped member 422'.
  • the annular corrugate fin 421 and the outer ring-shaped member 422' are firmly fixed together, and thus are not deformed.
  • the heat exchanger element 42' can be fixed in the desired position inside the body 41 without the use of adhesive or solder. Moreover, since the heat exchanger element 42' and the body 41 are not fixed together, the former can be taken out of the latter freely. Moreover, since the annular corrugate fin 421 and the outer ring-shaped member 422' are integrated together, they exhibit still better thermal conductivity.
  • Fig. 24 is an enlarged plan view of a portion of the heat rejector 4 of the embodiment, as seen axially.
  • Fig. 25 shows part of the manufacturing procedure of the heat rejector 4; specifically, Figs. 25A and 25B are respectively sectional views of the heat rejector before and after the heat exchanger element 42 is inserted into it from the guide member side thereof.
  • a cylindrical body 41 is fixed, together with a guide member 14, to a jig 15, with the axis of the body 41 kept substantially horizontal.
  • the guide member 14 is provided so as to abut the body 41, and has an external diameter substantially equal to that of the body 41.
  • the guide member 14 is so formed as to have a tapered cross section inside, forming a tapered portion 14a, so that its internal diameter is equal to the internal diameter of the body 41 at the joint and increases away therefrom.
  • annular corrugate fin 421 is produced in the same manner as described earlier in connection with the first to sixth embodiments, i.e. by forming a linear corrugate fin 420 into a cylindrical shape and putting both ends thereof together.
  • the annular corrugate fin 421 is made of a highly flexible material that is easily deformed when an external force is applied thereto.
  • annular corrugate fin 421 is pushed gradually in through the tapered portion 14a of the body 41, i.e. from the portion thereof having a greater internal diameter to the portion thereof having a smaller internal diameter.
  • Fig. 25B shows, the insertion is stopped when one end surface of the annular corrugate fin 421 becomes flush with the joint between the body 41 and the guide member 14. Meanwhile, the tops 421c of the annular corrugate fin 421 rub against the inner surface of the guide member 14, and they are thereby deformed from arc-shaped to flat. The degree of this deformation is commensurate with how much the material of the guide member 14 is harder than the material of the annular corrugate fin 421. As Fig. 24 shows, this increases the area of contact between the annular corrugate fin 421 and the inner surface of the body 41. This helps enhance the efficiency with which heat is transmitted from the annular corrugate fin 421 to the body 41 and thereby enhance the heat exchange performance of the heat rejector 4.
  • Fig. 26 is a plan view of the heat rejector 42 of this embodiment
  • Fig. 27 is a plan view of the heat exchanger element 42
  • Fig. 28 is a plan view of the cylindrical body.
  • an annular corrugate fin 421' round, wave-shaped projections 421k are formed so as to be in close contact with one another and at regular intervals overall.
  • a body 41 is produced by pouring a molten metal into a mold and then cooling it. As Fig. 28 shows, the body 41 has wave-shaped depressions 41m formed at regular intervals all around its inner surface so as to extend axially. These depressions 41m are so shaped that the aforementioned wave-shaped projections 421k of the annular corrugate fin 421' fit into them.
  • FIG. 2A shows, in advance, an inner ring-shaped member 422, of which the external diameter is made slightly substantially equal to the internal diameter of the annular corrugate fin 421', has been inserted into the annular corrugate fin 421', and they have been brazed together at where they make contact with each other, in order to produce the heat exchanger element 42 shown in Fig. 27.
  • the heat exchanger element 42 is inserted axially into the body 41, with the center of the former aligned with the center axis of the latter.
  • the projections 421k of the annular corrugate fin 421' fit into the depressions 41m of the body 41.
  • a heat exchanger element does not require bonding by hand when fitted into a body. This helps enhance the productivity of a heat exchanger member and reduce its manufacturing cost. Moreover, the heat exchanger member thus manufactured is less prone to variations in quality, and therefore offers stable heat exchange performance.
  • a corrugate fin and an inner or outer ring-shaped member are integrated together. This enhances heat conductivity and thus heat exchange efficiency.
  • a heat exchanger element is kept in position inside the body of a heat exchanger member by press fitting. This makes it possible to take the heat exchanger element out of the body and remove it therefrom. Thus, even if the corrugate fin is damaged, lowering the quality of the heat exchanger element, it is possible to replace the corrugate fin easily as required. This makes the heat exchanger element very economical and recyclable.
  • a heat exchanger element can be inserted into it smoothly even when the external diameter of the heat exchanger element is greater than the internal diameter of the body.
  • annular corrugate fin need not be fitted into a cylindrical body by hand by means of bonding or welding, but can be securely kept in position by press fitting simply by inserting the former into the latter. This helps enhance the productivity of the heat exchanger member. Moreover, uniform contact is achieved all around the annular corrugate fin. This makes it possible to manufacture the heat exchanger member stably with excellent performance.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP01963405A 2000-09-01 2001-08-30 Heat exchanger for stirling refrigerating machine, heat exchanger body, and method of manufacturing heat exchanger body Expired - Lifetime EP1314938B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2000265231A JP3563679B2 (ja) 2000-09-01 2000-09-01 スターリング冷凍機用熱交換器及び熱交換器体
JP2000265231 2000-09-01
JP2001042118 2001-02-19
JP2001042118A JP3563703B2 (ja) 2001-02-19 2001-02-19 スターリング冷凍機用熱交換器及びその製造方法
PCT/JP2001/007515 WO2002021056A1 (fr) 2000-09-01 2001-08-30 Echangeur thermique pour appareil refrigerant de stirling, dispositif echangeur thermique, et procede de fabrication d'un dispositif echangeur thermique

Publications (3)

Publication Number Publication Date
EP1314938A1 EP1314938A1 (en) 2003-05-28
EP1314938A4 EP1314938A4 (en) 2004-05-12
EP1314938B1 true EP1314938B1 (en) 2005-05-11

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EP01963405A Expired - Lifetime EP1314938B1 (en) 2000-09-01 2001-08-30 Heat exchanger for stirling refrigerating machine, heat exchanger body, and method of manufacturing heat exchanger body

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Country Link
EP (1) EP1314938B1 (ko)
KR (1) KR100523776B1 (ko)
CN (1) CN1206489C (ko)
BR (1) BR0114038B1 (ko)
CA (1) CA2419724C (ko)
DE (1) DE60110813T2 (ko)
ES (1) ES2240502T3 (ko)
TW (1) TW552384B (ko)
WO (1) WO2002021056A1 (ko)

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PL220684B1 (pl) 2011-06-10 2015-11-30 Aic Spółka Akcyjna Rurka wymiennika ciepła
CN102305391A (zh) * 2011-08-29 2012-01-04 环雅环保科技(上海)有限公司 翅片散热器
CN102425971B (zh) * 2011-11-10 2014-02-19 上海交通大学 带交错翅片的热交换器管、制作方法及其应用
TWI534403B (zh) * 2013-12-10 2016-05-21 建準電機工業股份有限公司 熱交換管
CN103775240B (zh) * 2014-01-24 2015-11-18 宁波荣捷特机械制造有限公司 一种斯特林循环装置内的散热片
CN103791764A (zh) * 2014-01-27 2014-05-14 南京航空航天大学 一种非接触式涡流发生器强化换热方法及其装置
CN105043143B (zh) * 2015-08-27 2017-03-22 西安交通大学 一种环形通道内管式气‑气换热器
CN106051482A (zh) * 2016-06-07 2016-10-26 浙江嘉熙科技有限公司 相变抑制翅片式散热器led灯
CN108453452A (zh) * 2017-10-31 2018-08-28 山东中科万隆电声科技有限公司 斯特林机换热器翅片焊接结构及其焊接方法
CN107976101B (zh) * 2017-12-22 2023-07-14 上海发电设备成套设计研究院有限责任公司 一种外翅片换热管的使用方法
CN108195098B (zh) * 2018-01-10 2020-01-10 中国科学院上海技术物理研究所 同轴型脉冲管制冷机的分体焊接式热端换热器的制造方法
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DE60110813T2 (de) 2006-02-02
CN1206489C (zh) 2005-06-15
KR20030028830A (ko) 2003-04-10
KR100523776B1 (ko) 2005-10-26
CA2419724A1 (en) 2003-02-19
CN1483129A (zh) 2004-03-17
EP1314938A1 (en) 2003-05-28
DE60110813D1 (de) 2005-06-16
CA2419724C (en) 2005-10-11
ES2240502T3 (es) 2005-10-16
BR0114038A (pt) 2003-07-22
TW552384B (en) 2003-09-11
BR0114038B1 (pt) 2010-11-30
EP1314938A4 (en) 2004-05-12

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