US20120193072A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20120193072A1
US20120193072A1 US13/395,155 US200913395155A US2012193072A1 US 20120193072 A1 US20120193072 A1 US 20120193072A1 US 200913395155 A US200913395155 A US 200913395155A US 2012193072 A1 US2012193072 A1 US 2012193072A1
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United States
Prior art keywords
heat
transfer tube
tube
coiled
heat exchanger
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
Application number
US13/395,155
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English (en)
Inventor
Kaoru Enomura
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M Technique Co Ltd
Original Assignee
M Technique Co Ltd
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Filing date
Publication date
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Assigned to M. TECHNIQUE CO., LTD. reassignment M. TECHNIQUE CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENOMURA, KAORU
Publication of US20120193072A1 publication Critical patent/US20120193072A1/en
Abandoned legal-status Critical Current

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    • 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
    • F28D7/10—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 one within the other, e.g. concentrically
    • 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
    • F28D7/0008—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 one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0016—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 one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being bent
    • 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
    • F28D7/02—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 helically coiled
    • 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
    • F28D7/02—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 helically coiled
    • F28D7/024—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 helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical 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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • 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
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/127—Fastening; Joining by methods involving deformation of the elements by shrinking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts

Definitions

  • the present invention relates to a heat exchanger. More specifically, the present invention relates to a heat exchanger such as a heater or a cooler capable of performing low flow processing of a fluid to be processed, especially, for the use of chemical experiments.
  • Examples of performance generally required for the heat exchanger include heat exchanging performance, corrosion resistance, pressure tightness, robustness, cleaning properties, and downsizing.
  • the heat exchanger also requires low cost production thereof.
  • a multipipe heat exchanger, a double-pipe heat exchanger, a coiled heat exchanger, a plate heat exchanger, and the like are mainly used as the conventional heat exchanger.
  • Such heat exchangers however, have the complex structures or have difficulties in downsizing, is costly, and low cleaning properties.
  • examples of the heat exchanger to be used in low flow processing more specifically, in chemical experiments generally include a glass coil type heat exchanger and a glass double-pipe heat exchanger. In this case, the good heat exchanging performance is not expected because of low thermal conductivity of the glass itself.
  • Patent Document 1 conventionally known is a heat exchanger including a coiled heat-transfer tube placed in a space defined between an inner tube and an outer tube, wherein an inside space of the heat-transfer tube is used as one of flow paths, a coiled space between coiled sections of the heat-transfer tube in the space is used as the other flow path, and wherein an efficient heat exchange is achieved between one fluid and the other fluid.
  • the heat-transfer tube is not fixed to either one of an outer peripheral surface of the inner tube or an inner peripheral surface of the outer tube but the heat-transfer tube is only naturally mounted. Therefore, in a case of a high-viscosity fluid, the heat-transfer tube expands or contracts due to a flow resistance, which may cause, for example, pitches between coiled sections to be non-uniform and partially narrower or tighter.
  • Patent Document 1 JP2002-147976A
  • the present invention is to improve one type of heat exchangers, which includes a coiled heat-transfer tube placed in a space defined between an inner tube and an outer tube.
  • An inside space of the heat-transfer tube is used as one of flow paths, and a coiled space defined between coiled sections of the heat-transfer tube in the space is used as the other flow path.
  • Heat is exchanged between one fluid and the other fluid.
  • a purpose of the present invention is to provide a heat exchanger to/from which the heat-transfer tube can be attached or detached with ease.
  • another purpose of the present invention is to provide a heat exchanger capable of controlling a variation of the flow path area caused by a deformation of the heat-transfer tube due to a flow resistance.
  • the present invention is directed to provide the heat exchanger that can achieve either one of the above described purposes.
  • a more specific purpose of the present invention is to provide a heat exchanger that is small, has a good heat exchange property, and can perform low flow processing in which a fluid to be processed can be passed, especially, in various chemical experiments, with a cost less than those of the conventional heat exchangers.
  • the invention recited in claim 1 provides a heat exchanger.
  • the heat exchanger includes a coiled heat-transfer tube l placed in a space 7 defined between an inner tube 5 and an outer tube 6 .
  • An inside space of the heat-transfer tube 1 is used as one of flow paths, and a coiled space 4 between coiled sections of the heat-transfer tube 1 in the space 7 is used as the other flow path.
  • Heat is exchanged between one fluid and the other fluid.
  • the heat exchanger also includes a tensioning mechanism for keeping an expansion or contraction force for expanding or contracting a diameter of the coiled heat-transfer tube 1 than a diameter the heat-transfer tube 1 naturally has. The heat is exchanged between one fluid and the other fluid while the expansion and contraction force is applied to the heat-transfer tube 1 by the tensioning mechanism.
  • the invention recited in claim 2 provides the heat exchanger of claim 1 , wherein the heat-transfer tube 1 may not be fixed either one of an outer peripheral surface of the inner tube 5 or an inner peripheral surface of the outer tube 6 , and the tensioning mechanism may expand or contract a diameter of the coiled heat-transfer tube 1 than a diameter the tube naturally has, thereby bringing the heat-transfer tube 1 into close contact with or pressure contact against the inner tube 5 or the outer tube 6 .
  • the invention recited in claim 3 provides the heat exchanger of claim 1 or 2 , wherein a load in a coil axis direction applied may be equal to or less than 10 kg when the heat-transfer tube 1 varies a length of the coil in the coil axis direction by 10% in comparison with the length of the tube as it naturally has.
  • the invention recited in claim 4 provides the heat exchanger of claim 3 , wherein the heat-transfer tube 1 may be made of a material selected from the group consisting of metals such as stainless steel, hastelloy, inconel, titanium, copper, and nickel; acrylic resins such as ABS, polyethylene, polypropylene, and PMMA; fluorine based resins such as polycarbonate, PTFE, and PFA; and an epoxy resin.
  • metals such as stainless steel, hastelloy, inconel, titanium, copper, and nickel
  • acrylic resins such as ABS, polyethylene, polypropylene, and PMMA
  • fluorine based resins such as polycarbonate, PTFE, and PFA
  • an epoxy resin such as polycarbonate, PTFE, and PFA
  • the invention recited in claim 5 provides the heat exchanger of claim 4 , wherein an outer diameter of the heat-transfer tube 1 is equal to or less than 28 mm.
  • the invention recited in claim 6 provides a heat exchanger.
  • the heat exchanger includes a coiled heat-transfer tube 1 placed in a space 7 defined between an inner tube 5 and an outer tube 6 .
  • An inside space of the heat-transfer tube 1 is used as one of flow paths, and a coiled space 4 between coiled sections of the heat-transfer tube 1 in the space 7 is used as the other flow path.
  • Heat is exchanged between one fluid and the other fluid.
  • the coiled heat-transfer tube 1 is elastically deformed from its natural state so as to be brought into close contact with or pressure contact against the inner tube 5 or the outer tube 6 and the heat is exchanged between one fluid and the other fluid while the heat-transfer tube 1 is elastically deformed.
  • the heat exchanger according to the present invention keeps a state that the expansion or contraction force is applied to the heat-transfer tube 1 by the tensioning mechanism in use, i.e., at least during the heat exchange. Therefore, the heat-transfer tube always receives the force and thus a deformation of the heat-transfer tube due to the flow resistance hardly occurs even if the heat-transfer tube does not contact the inner tube 5 or the outer tube 6 . Therefore, a non-uniform deformation of the coiled heat-transfer tube 1 can be reduced.
  • the deformation occurs less by bringing the heat-transfer tube 1 to close contact with or pressure contact against the inner tube 5 or the outer tube 6 by an action of the tensioning mechanism.
  • Another operation and effect of the heat exchanger according to the present invention is to make the coiled heat-transfer tube 1 be easily attached or detached. More specifically, the heat-transfer tube 1 is placed freely with a suitable clearance defined between the inner tube 5 and the outer tube 6 . Then, the heat-transfer tube 1 is placed in a tensed state to generate the expansion and contraction force to be brought into contact with either one of the inner tube 5 or the outer tube 6 . The expansion and contraction force is then kept by the tensioning mechanism, thereby keeping the contacting state. Upon disassembly and the like, the expansion or contraction force is released to allow the heat-transfer tube to be detached with ease.
  • the heat-transfer tube is placed in a pressure contact state by applying the expansion or contraction force after it is attached without the clearance (i.e., in the contacting state). Then, the pressure contact state is kept by the tensioning mechanism. Upon disassembly, the expansion or contraction force is released to allow the heat-transfer tube to be detached relatively easier.
  • the heat-transfer tube can be replaced easily even when a clogging or adhesion occurs in the heat-transfer tube. Therefore, disposal of or expensive cleaning the heat exchanger itself is no longer necessary as it is required in the conventional heat exchangers. Further, an occurrence of the expansion or contraction of the heat-transfer tube due to a flow of heating medium can be avoided. Still further, since the structure can be simplified in comparison with the conventional ones, manufacturing steps can be reduced. As a result, the heat exchanger can be provided with lower cost.
  • FIG. 1(A) illustrates a configuration of a heat exchanger according to one embodiment of the present invention and FIG. 1(B) is a plan view thereof.
  • FIG. 2(A) illustrates a configuration of a heat exchanger according to another embodiment of the present invention and FIG. 2(B) is a plan view thereof.
  • FIG. 3(A) illustrates a configuration of a heat exchanger according to still another embodiment of the present invention and FIG. 3(B) is a plan view thereof.
  • FIG. 4(A) is an enlarged view of a substantial portion of the heat exchanger according to the embodiment of the present invention in assembling and FIG. 4(B) is an enlarged view of a substantial portion of the heat exchanger when the assembling processing is completed.
  • a heat exchanger of this embodiment includes an inner tube 5 and an outer tube 6 which have a substantially circular lateral cross section, wherein upper ends and lower ends of the inner tube 5 and the outer tube 6 are closed by an upper closing part 9 and a lower closing part 8 , respectively.
  • the inner tube 5 and the lower closing part 8 are integrally formed.
  • not the lower closing part 8 but the upper closing part 9 may be integrally formed with the inner tube 5 .
  • none of the lower closing part 8 or the upper closing part 9 is integrally formed with the inner tube 5 but may be formed detachably.
  • a coiled heat-transfer tube 1 is placed in the space 7 defined between the inner tube 5 and the outer tube 6 such that the coiled heat-transfer tube 1 closely contacts with or pressure contacts against at least either one of an outer perimeter of the inner tube 5 or an inner perimeter of the outer tube 6 .
  • the coiled heat-transfer tube 1 pierces through the upper closing part 9 and the lower closing part 8 , thereby being contactable with pipes outside the heat exchanger.
  • the heat-transfer tube 1 is not fixed to either one of the outer peripheral surface of the inner tube 5 or the inner peripheral surface of the outer tube 6 .
  • a coiled space 4 is defined between turns of the coiled heat-transfer tube 1 .
  • the coiled space 4 having predetermined intervals is enclosed by the vertically adjacent different turns of the heat-transfer tube 1 and the inner and outer tubes 5 , 6 .
  • the illustrated coiled heat-transfer tube 1 , inner tube 5 and outer tube 6 are implemented in a cylindrical shape having a vertically uniform diameter. However, they may be formed into a shape having a vertically varying diameter (i.e., a circular truncated cone shape or an inverted circular truncated cone shape).
  • a fluid 2 to be processed passes through an inside of the heat-transfer tube 1 .
  • a preferable material for the heat-transfer tube 1 can expand and contract and has a high corrosion and pressure resistance, and robustness against the target fluid to be processed through the heat-transfer tube.
  • the material for the heat-transfer tube include a metal such as stainless steel, hastelloy, inconel, titanium, copper, and nickel; an acrylic resin such as ABS, polyethylene, polypropylene, and PMMA; a fluorine based resin such as polycarbonate, PTFE, and PFA; and an epoxy resin.
  • the external section of the heat-transfer tube 1 as the coiled space 4 is a space for passing a heating medium 3 .
  • the heating medium 3 enters and exists through nozzles 10 formed in the upper closing part 9 and the lower closing part 8 , respectively. Accordingly, the heating medium 3 can be passed through the space 7 and the coiled space 4 .
  • the fluid 2 to be processed is passed upwardly (i.e., in a U direction) in FIG. 1 and the heating medium 3 is passed downwardly (i.e., in an S direction) to create an absolute counterflow. Accordingly, both of the fluid 2 to be processed and the heating medium 3 are prevented from an increase of a pressure loss, resulting in securing a large overall heat-transfer coefficient.
  • a flow of both fluids in the same direction should not be excluded from consideration.
  • the heat-transfer tube 1 is assembled with the lower closing part 8 and the inner tube 5 which are integrally formed.
  • the above attachment can be performed smoothly by defining a suitable clearance 4 c between the inner tube 5 and the heat-transfer tube 1 (See FIG. 4(A) ).
  • the heat-transfer tube 1 is fixed to the lower closing part 8 .
  • the fixation is performed with what having a tensioning mechanism 11 .
  • the tensioning mechanism 11 keeps the expansion or contraction force for expanding or contracting the diameter of the coiled heat-transfer tube 1 than the diameter the coiled heat-transfer tube 1 naturally has.
  • an interlocking joint 11 is employed as the tensioning mechanism 11 .
  • the tensioning mechanism may include a clamp, a saddle band, a strap, and a bracket.
  • the tensioning mechanism may be a fixation by, for example, welding or bonding (not illustrated).
  • the tensioning mechanism 11 may be configured only to keep the expansion or contraction force, whereas, generation of the expansion or contraction force may be performed by another mechanism. However, in a case of the interlocking joint 11 , it generates as well as keeps the expansion or contraction force.
  • the heat-transfer tube 1 is pulled in the U direction to reduce the diameter of the coiled heat-transfer tube 1 , thereby bringing the heat-transfer tube 1 into close contact with or pressure contact against the inner tube 5 ( FIG. 4(B) ).
  • the outer tube 6 slightly spaced by a gap 4 d from the outer diameter of the assembled coiled heat-transfer tube 1 , and the upper closing part 9 are assembled therewith.
  • the outer tube 6 and the upper closing part 9 may be integrally formed or may be formed so as to be disassembled.
  • the slight gap 4 d is kept while the heat-transfer tube 1 is pulled in the U direction.
  • the outer tube 6 is then mounted to the outside of the heat-transfer tube 1 and the upper closing part 9 is temporally attached thereto.
  • an upper end of the heat-transfer tube 1 is fixed to the upper closing part 9 , thereby completing the attachment between the outer tube 6 and the upper closing part 9 .
  • the tensioning mechanism 11 of the upper closing part 9 may be configured to be adjustable of an upper end position of the outer tube 6 in the same manner as the interlocking joint 11 of the lower closing part 8 or may be an unadjustable fixing mechanism.
  • the load is preferably equal to or less than 10 kg.
  • the outer diameter of the heat-transfer tube 1 is preferably equal to or less than 28 mm.
  • the above example is suitable for the heat-transfer tube 1 naturally having an inner diameter larger than the outer diameter of the inner tube 5 .
  • the following method is employable.
  • the tensile force in the U direction is released.
  • the coiled heat-transfer tube 1 attempts to resume its natural size.
  • the coiled heat-transfer tube 1 is brought into close contact with or pressure contact against the inner peripheral surface of the mounted outer tube 6 .
  • the upper end of the heat-transfer tube 1 is fixed to the upper closing part 9 to complete the attachment between the outer tube 6 and the upper closing part 9 .
  • the heat-transfer tube 1 is attached with a suitable clearance 4 c between the inner tube 5 and the heat-transfer tube 1 , and the outer tube 6 having a slight gap with the outer coil diameter of the heat-transfer tube 1 is assembled with the upper closing part 9 .
  • the heat-transfer tube 1 is pulled in the vertical direction so that the upper end and the lower end thereof separate from each other by, for example, operating the interlocking joint 11 to generate the expansion or contraction force (i.e., a contraction force in this case).
  • the diameter of the coiled heat-transfer tube 1 is reduced to bring the heat-transfer tube 1 into close contact with or pressure contact against the inner tube 5 .
  • the expansion or contraction force is then kept to secure the close contact or pressure contact state.
  • the heat-transfer tube 1 is brought into close contact with or pressure contact against the inner tube 5 .
  • the heat-transfer tube 1 is pushed downwardly into the outer tube 6 from above, i.e., in the S direction (in other words, the upper end is brought closer to the lower end) to increase the coiled diameter, thereby bringing the heat-transfer tube 1 into close contact with or pressure contact against the outer tube 6 .
  • the upper end and the lower end of the heat-transfer tube 1 is pushed or pulled in the coil axial direction.
  • the upper end and the lower end of the heat-transfer tube 1 may be pushed or pulled in a direction in which a helical structure of the coil extends.
  • the pushing or pulling direction can be changed, as required, provided that the expansion or contraction force can be generated.
  • the vertical orientation is exemplified, but the orientation may be inverted. More specifically, up and down can be interpreted as one side and the other side, respectively.
  • the heat-transfer tube 1 can be placed in the space 7 defined between the inner tube 5 and the outer tube 6 so as to be on a concentric circle of the inner and the outer tubes. Therefore, the coiled space 4 sandwiched between the adjacent coiled sections of the heat-transfer tube 1 in the space 7 can be used as a flow path of the heating medium 3 .
  • the heat exchanger according to the present invention can be disassembled with ease according to a reversed procedure of the above assembling method.
  • the heat-transfer tube 1 may expand or contract due to the flow resistance of the heating medium 3 , which may invite a case that the pitches between the coiled sections of the heat-transfer tube 1 become tight.
  • the flow resistance of the heating medium 3 causes the coiled sections of the heat-transfer tube 1 become closer to each other and finally the coiled heat-transfer tube 1 may move to a direction the coiled space 4 is eliminated.
  • the heating medium 3 becomes not to pass smoothly in the coiled space 4 , there arises a problem that the heat exchange cannot work at all, that the effective/efficient heat exchange cannot be performed, or that breakage or short-life of the heat-transfer tube 1 may be induced.
  • the heat-transfer tube 1 although the heat-transfer tube 1 is not fixed, the heat-transfer tube 1 close contacts with or pressure contacts against at least either one of the outer perimeter of the inner tube 5 or the inner perimeter of the outer tube 6 . Therefore, the coiled heat-transfer tube 1 can be prevented from the displacement caused due to the flow resistance that is generated by the flow of the heating medium 3 . As a result, the above described problems can be solved.
  • the heat-transfer tube 1 may include a plurality of heat-transfer tubes.
  • the number of the heat-transfer tubes 1 to be assembled together is not particularly limited. The number is determined according to a necessary flow rate of the fluid to be processed or the number of types of fluids to be treated. Examples of assembling the plurality of heat-transfer tubes are illustrated with reference to FIGS. 2(A) and 2(B) , and FIGS. 3(A) and 3(B) . For example, as illustrated in FIG.
  • the heat-transfer tube 1 a and the heat-transfer tube 1 b are assembled with the lower closing part 8 (or the upper closing part 9 ) and the inner tube 5 , which are integrally formed, and are fixed at different positions on the lower closing part 8 . Then, the heat-transfer tube 1 a and the heat-transfer tube 1 b are brought into close contact with or pressure contact against the inner tube 5 by the above described mechanism, followed by being further assembled with the outer tube 6 and the upper closing part 9 (or the lower closing part 8 ). Accordingly, the plurality of heat-transfer tubes 1 can be assembled.
  • the coiled heat-transfer tubes 1 may be implemented in a manner that the diameters of the coiled heat-transfer tubes are located on concentric circles.
  • the heat-transfer tube 1 a is assembled with the lower closing part 8 (or the upper closing part 9 ) and the inner tube 5 which are integrally formed.
  • the heat-transfer tube 1 a is then brought into close contact with or pressure contact against the inner tube 5 by the above described mechanism.
  • the outer tube 6 a spaced from the outer diameter of the coiled heat-transfer tube 1 a by the slight gap is assembled therewith.
  • the heat-transfer tube 1 b is assembled with the lower closing part 8 (or the upper closing part 9 ) to bring the heat-transfer tube 1 b into close contact with or pressure contact against the outer peripheral surface of the outer tube 6 a by the above described mechanism. Then, the outer tube 6 b and the upper closing part 9 (or the lower closing part 8 ) are assembled therewith. Accordingly, the plurality of heat-transfer tubes 1 can be assembled. In the embodiment illustrated in FIG. 3 , the coiled spaces 4 a and 4 b are defined. Even in a case where more than three heat-transfer tubes are assembled together, this configuration can be implemented using a material and an assembling method similar to those described above. In this case, the assembly can be performed by a combination of the assembly based on the same diameter and the assembly based on the concentric circles.
  • the fluid 2 to be processed such as water, organic solvent, solution that is produced by dissolving solute, and microparticle dispersion liquid to be used in the low flow processing, more specifically, used in various chemical experiments. Therefore, the heat-transfer tube 1 often needs to be replaced depending on experiment descriptions. Furthermore, in a case where solid and powder contained in the fluid 2 to be processed, or solute dissolved in the fluid 2 to be processed is precipitated due to a change of temperature or concentration or due to drying, such solid matters may adhere or clog inside the heat-transfer tube 1 to invite a necessity of replacement of the heat-transfer tube 1 .
  • the structure of the heat exchanger according to the present invention solves the above problems of the submerged heat exchanger and the double-pipe heat exchanger. Further, as described above, in a case when the heat-transfer tube 1 is required to be replaced, the heat exchanger according to the present invention is characterized in that it can be assembled or disassembled very easily because the heat exchanger according to the present invention has a very simple structure in comparison with the multipipe heat exchanger and the plate type heat exchanger.
  • the heat exchanger in addition to the easy replacement of the heat-transfer tube, the heat exchanger can be easily disassembled and cleaned, so that it is not necessary to dispose the heat exchanger itself or perform a costly cleaning of the heat exchanger as it is done in the conventional heat exchanger.
  • the inner diameter ⁇ of the coiled heat-transfer tube 1 is larger than or equal to the outer diameter a of the inner tube 5 ( ⁇ )
  • the outer diameter a of the inner tube 5 comes to be equal to the inner diameter ⁇ of the heat-transfer tube 1 by the external force to bring the heat-transfer tube 1 into close contact with or pressure contact against the inner tube 5 .
  • the inner diameter ⁇ may be increased by compressing the heat-transfer tube 1 in order to facilitate the insertion.
  • the inner tube 5 is inserted while the heat-transfer tube 1 is compressed to expand the inner diameter ⁇ . After the insertion, when the compressing force is released and the heat-transfer tube 1 is then pulled, as required, the outer diameter a of the inner tube 5 becomes equal to the inner diameter ⁇ of the heat-transfer tube 1 due to the elastic deformation of the heat-transfer tube 1 , thereby bringing the heat-transfer tube 1 into close contact with or pressure contact against the inner tube 5 .
  • the heat-transfer tube 1 in its natural state is inserted into the outer tube 6 and, the heat-transfer tube 1 is then compressed after the insertion, the inner diameter ⁇ of the outer tube 6 comes to be equal to the outer diameter ⁇ of the heat-transfer tube 1 by the external force, thereby bringing the heat-transfer tube 1 into close contact with or pressure contact against the outer tube 6 .
  • the heat-transfer tube 1 may be pulled to reduce the outer diameter ⁇ thereof in order to facilitate the insertion.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US13/395,155 2009-11-24 2009-11-24 Heat exchanger Abandoned US20120193072A1 (en)

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US11249268B2 (en) * 2017-09-08 2022-02-15 Commscope Technologies Llc Heat dissipation enclosure
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WO2018158843A1 (ja) * 2017-02-28 2018-09-07 株式会社巴商会 熱交換器
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Cited By (8)

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Publication number Priority date Publication date Assignee Title
WO2016055458A1 (de) * 2014-10-08 2016-04-14 Mahle International Gmbh Verfahren zur montage einer wärmetauschereinrichtung und wärmetauschereinrichtung
US20170307262A1 (en) * 2014-10-08 2017-10-26 Mahle International Gmbh Method for mounting a heat exchanger device and a heat exchanger device
US11249268B2 (en) * 2017-09-08 2022-02-15 Commscope Technologies Llc Heat dissipation enclosure
US20220186881A1 (en) * 2020-07-13 2022-06-16 Ivys Inc. Hydrogen fueling systems and methods
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KR101358271B1 (ko) 2014-02-05
EP2505951A4 (en) 2016-06-15
JP4517248B1 (ja) 2010-08-04
US20180259266A1 (en) 2018-09-13
JPWO2011064839A1 (ja) 2013-04-11
CN102472594A (zh) 2012-05-23
WO2011064839A1 (ja) 2011-06-03
EP2505951B1 (en) 2020-12-23
EP2505951A1 (en) 2012-10-03
KR20120067975A (ko) 2012-06-26
CN102472594B (zh) 2014-08-20

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