EP2163842A1 - Élément d'échange thermique total et son procédé de fabrication - Google Patents

Élément d'échange thermique total et son procédé de fabrication Download PDF

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Publication number
EP2163842A1
EP2163842A1 EP07828155A EP07828155A EP2163842A1 EP 2163842 A1 EP2163842 A1 EP 2163842A1 EP 07828155 A EP07828155 A EP 07828155A EP 07828155 A EP07828155 A EP 07828155A EP 2163842 A1 EP2163842 A1 EP 2163842A1
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EP
European Patent Office
Prior art keywords
adhesive
heat exchange
water
total heat
moisture absorbent
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.)
Granted
Application number
EP07828155A
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German (de)
English (en)
Other versions
EP2163842B1 (fr
EP2163842A4 (fr
Inventor
Masaru Takada
Hidemoto Arai
Takanori Imai
Michio Murai
Shinya Tokizaki
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
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Publication of EP2163842A1 publication Critical patent/EP2163842A1/fr
Publication of EP2163842A4 publication Critical patent/EP2163842A4/fr
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Classifications

    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0025—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by zig-zag bend plates
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making

Definitions

  • the present invention relates to a total heat exchange element and a manufacturing method thereof, the total heat exchange element being used in a heat exchanger included in an air-conditioning apparatus or a ventilator and being configured so as to exchange latent heat as well as to exchange sensible heat between two types of air flows.
  • the present invention more specifically relates to a total heat exchange element used in a stationary-type heat exchanger and a manufacturing method thereof.
  • heat exchangers included in air-conditioning apparatuses and ventilators there are two types such as rotation-type heat exchangers and stationary-type heat exchangers.
  • total heat exchange elements are preferably used because total heat exchange elements have higher heat exchange efficiency than sensible heat exchange elements, which exchange only sensible heat.
  • a total heat exchange element is obtained by manufacturing a long product by using a single-face corrugated cardboard manufacturing apparatus (i.e., single-facer apparatus) and using the long product as a material for the heat exchange element, the long product having a structure in which a sheet-like partition member and a corrugated-plate-like spacing member are pasted together.
  • a total heat exchange element used in a rotation-type heat exchanger is manufactured by applying an adhesive to a predetermined surface of the long product described above and rolling the long product into a wheel-like configuration.
  • a total heat exchange element used in a stationary-type heat exchanger is manufactured by obtaining a plurality of element structuring units by cutting the long product described above into pieces of a predetermined size and stacking, in the manner of layers, the element structuring units oriented in predetermined directions (in other words, by stacking the element structuring units in the manner of layers in such a manner that the corrugation stripes of the spacing members included in the element structuring units that are positioned adjacent to each other in the layer stacking direction are substantially orthogonal to each other.) In this situation, the elements structuring units that are positioned adjacent to each other in the layer stacking direction are joined together by using an adhesive.
  • the functions that the partition members and the spacing members are expected to have are different, because operation principles of the heat exchangers are different. Roughly speaking, in the total heat exchange elements that are used in rotation-type heat exchangers, the partition members and the spacing members are expected to have heat storing and releasing properties as well as moisture storing and releasing properties.
  • the partition members are expected to have heat conductivity and moisture permeability, whereas the spacing members are expected to play a role of securing air flow passages by maintaining intervals between the partition members and to have a certain degree of gas blocking properties for the purpose of inhibiting leaks of the air flows.
  • the present invention relates to a total heat exchange element that is used in a stationary-type heat exchanger.
  • a water-soluble or non-water-soluble moisture absorbent moisture permeable agent
  • an alkali metal salt such as lithium chloride or an alkali earth metal salt such as calcium chloride
  • the non-water-soluble moisture absorbent for example, silica gel or powder of a strongly acidic ion-exchange resin or a strongly basic ion-exchange resin may be used.
  • Patent Document 1 describes a paper that can be used in a total heat exchange member.
  • the paper is obtained by applying a moisture absorbing/releasing coating layer of which the main components are moisture absorbing/releasing powder (i.e., a non-water-soluble moisture absorbent) and a binder, onto one or both surfaces of a flame-retardant base paper, and further applying a thermal-adhesion-type adhesive layer onto one of the surfaces of the flame-retardant base paper.
  • a moisture absorbing/releasing coating layer of which the main components are moisture absorbing/releasing powder (i.e., a non-water-soluble moisture absorbent) and a binder
  • Patent Document 2 describes an adsorbing sheet obtained by partially embedding granular adsorbing members into an adhesive layer formed on a base material for the sheet, and further covering the adhesive layer and the granular adsorbing members with an adsorbent layer containing a particulate adsorbent (i.e., a non-water-soluble moisture absorbent).
  • adsorbing sheet is used in, for example, a rotation-type total heat exchanger or a dehumidifying rotor.
  • Patent Document 3 describes a heat exchange element obtained by manufacturing a partition member (i.e., a flat plate) by using craft paper or a film having moisture permeability or moisture absorbing properties, and also, manufacturing a spacing member (i.e., a corrugated plate) by using a metallic foil on which a synthetic resin film is laminated or a synthetic resin film, and further adding a water-soluble moisture absorbent to the partition member.
  • Patent Document 4 describes a composite heat-transfer element obtained by manufacturing a partition member (i.e., a liner) by using a paper to which a water-soluble moisture absorbent or non-water-soluble moisture absorbent has been added, and also, manufacturing a spacing member (i.e., a corrugate) by using a metallic foil.
  • the composite heat-transfer element can be used in a total heat exchanger.
  • Patent Document 5 describes a heat exchanger obtained by manufacturing a spacing member (i.e., a spacing plate) by using a material obtained by blending fiber (i.e., cellulose fiber) that has a high softening point with a resin that has a lower softening point than the fiber and making the blended material into the form of paper, and also, manufacturing an element structuring unit (i.e., a unit member) by joining, by way of thermal fusion bonding, the spacing member and a partition member together while using the same resin as a binder, and further stacking a predetermined number of element structuring units in the manner of layers by using an aqueous adhesive or by using the same resin as a binder.
  • a spacing member i.e., a spacing plate
  • a material obtained by blending fiber i.e., cellulose fiber
  • an element structuring unit i.e., a unit member
  • Patent Document 6 describes a heat exchanger obtained by manufacturing a partition member, by using a gas blocking product obtained by forming a moisture permeable film being capable of blocking air on one of the surfaces of a plate-like porous member, and also, forming a moisture absorbent layer on the other surface, and further joining the partition member and a spacing member together by using an aqueous adhesive.
  • Patent Document 7 describes a heat exchange element obtained by configuring a spacing member (i.e., a spacing plate) by disposing a thin film having air blocking properties so as to be in close contact with a porous member (i.e., woven cloth, nonwoven cloth, knitted cloth, paper, or the like), and also, manufacturing an element structuring unit (i.e., a unit member) by bonding the spacing member with a partition member (i.e., a partition plate) by using a thermal-adhesion-type adhesive layer formed on the entirety of one of the surfaces of the spacing member or the partition member, and subsequently stacking a predetermined number of element structuring units in the manner of layers by using an aqueous adhesive.
  • the partition member included in the heat exchange element is configured by, for example, disposing a moisture permeable film so as to be in close contact with a porous member, the moisture permeable film being capable of selectively allow water vapor to permeate therethrough.
  • the inventors of the present invention have placed their focus on a situation in which, when a partition member to which a water-soluble moisture absorbent has been added and a spacing member manufactured by using a water retentive material are joined together by using an aqueous adhesive, between the time at which the aqueous adhesive is applied and the time at which the aqueous adhesive has dried and the joining process is completed, the water, which is the solvent in the aqueous adhesive, seeps into both the partition member and the spacing member, so that a part of the water-soluble moisture absorbent in the partition member moves into the spacing member via the aqueous adhesive.
  • the partition member Because the water-soluble moisture absorbent moves from the partition member into the spacing member, when the partition member has been assembled into a total heat exchange element, the partition member is not able to maintain the moisture permeability that could be achieved when the partition member was by itself. It has been implied that, as a result, there is a possibility that the latent heat exchange efficiency may decrease.
  • a total heat exchange element according to the present invention has a stacked-layer structure in which sheet-like partition members added a water-soluble moisture absorbent thereto and spacing members are stacked alternately, the spacing members being joined with the partition members by using an adhesive so as to form air flow passages together with the partition members, wherein the spacing members have water retention properties, and the adhesive exhibits insolubility to the water-soluble moisture absorbent or an aqueous solution of the water-soluble moisture absorbent.
  • a manufacturing method of a total heat exchange element according to the present invention having a stacked-layer structure in which sheet-like partition members added a water-soluble moisture absorbent thereto and spacing members are stacked alternately, the spacing members being joined with the partition members by using an adhesive so as to form air flow passages together with the partition members, the manufacturing method includes a unit manufacturing step of obtaining a plurality of element structuring units in each of which one of the partition members and a corresponding one of the spacing members each being made of a water retentive material are joined together by using the adhesive; and a layer stacking step of joining the element structuring units together by using an adhesive and obtaining the total heat exchange element in which the plurality of element structuring units are stacked in layers, wherein the adhesive used at the unit manufacturing step and the adhesive used at the layer stacking step each exhibits insolubility to the water-soluble moisture absorbent or an aqueous solution of the water-soluble moisture absorbent.
  • an adhesive that exhibits insolubility to the water-soluble moisture absorbent or an aqueous solution of the water-soluble moisture absorbent is used as the adhesive used for joining the partition members and the spacing members together.
  • such an adhesive is used into which the water-soluble moisture absorbent is not able to dissolve, while the adhesive is in an unhardened state, and into which the water-soluble moisture absorbent or an aqueous solution of the water-soluble moisture absorbent is not able to seep, after the adhesive is hardened.
  • the total heat exchange element it is easy to enhance the latent heat exchange efficiency by adding a desired amount of moisture absorbent to the partition members. In addition, it is also easy to inhibit the latent heat exchange efficiency from decreasing over the course of time.
  • the spacing members has water retention properties, even if condensation has occurred so that the water-soluble moisture absorbent dissolves into the condensation water, it is possible to have the condensation water absorbed by the spacing members.
  • an air-conditioning apparatus or a ventilator is structured by using the total heat exchange element according to the present invention, it is possible to inhibit serious malfunctions such as the tracking phenomenon that may occur when the condensation water in which the water-soluble moisture absorbent has dissolved comes into contact with an electric power charging unit of such an apparatus.
  • Fig. 1 is a schematic perspective view illustrating an example of a total heat exchange element.
  • a total heat exchange element 20 shown in Fig. 1 is of a cross-flow type and has a stacked-layer structure in which sheet-like partition members 1 and corrugated-plate-like spacing members 5 are stacked in the manner of layers so as to alternate.
  • the stacked-layer structure is formed by stacking six element structuring units 10a to 10f in the manner of layers.
  • a top plate member 15 is further stacked on top of the element structuring unit 10f that is provided in the uppermost position.
  • the corrugation stripes of the spacing member 5 in any one of the element structuring units are substantially orthogonal, in a planar view, to the corrugation stripes of the spacing member 5 in another one of the element structuring units that is positioned above or below the one of the element structuring units.
  • the lengthwise directions of ridges or grooves of the corrugated-plate-like spacing member 5 in any one of the element structuring units are substantially orthogonal, in a planar view, to the lengthwise directions of ridges or grooves of the corrugated-plate-like spacing member 5 in another one of the element structuring units that is positioned above or below the one of the element structuring units.
  • Each of the partition members 1 includes a base material and a water-soluble moisture absorbent that has been added to the base material.
  • a base material for each of the partition members 1 such a material is used to which it is possible to add a water-soluble moisture absorbent and with which it is possible to join a corresponding one of the spacing members 5 by using an adhesive described below.
  • a material having a high level of air permeation resistance e.g., approximately 200 seconds or higher
  • a material having a low level of air permeation resistance e.g., the levels of air permeation resistance denote ones measured by using a Gurley tester.
  • a material having a low level of air permeation resistance it is desirable to impregnate the base material having the low level of air permeation resistance with a water-soluble polymer such as polyvinyl alcohol as a sealing agent.
  • an alkali metal salt that is deliquescent such as lithium chloride
  • an alkali metal salt that is deliquescent such as calcium chloride
  • alginic acid alginic acid
  • a salt of alginic acid a polysaccharide such as carrageenan or chitosan
  • urea a polysaccharide
  • any other substances having water solubility and moisture absorbing properties as the water-soluble moisture absorbent.
  • Deliquescent alkali metal salts and deliquescent alkali earth metal salts have higher capabilities of adsorbing water than other water-soluble moisture absorbents and are able to dramatically change the performance level of the total heat exchange element 20 according to an added amount thereof.
  • a deliquescent alkali metal salt or a deliquescent alkali earth metal salt is particularly desirable as the water-soluble moisture absorbent.
  • the water-soluble moisture absorbent to the base material by, for example, preparing an aqueous solution of the water-soluble moisture absorbent and impregnating the base material with the aqueous solution or by applying the aqueous solution to one or both surfaces of the base material by using equipment such as a gravure coater.
  • a binder component or a sealing agent to the aqueous solution.
  • the binder component may inhibit the base material from being impregnated with the water-soluble moisture absorbent, depending on what type of binder component is used.
  • each of the partition members 1 depends on the level of moisture permeability that the partition members 1 are expected to have and the material strength of the base material, it is generally desirable to configure the thickness of each of the partition members 1 so as to be approximately 20 ⁇ m to 100 ⁇ m, because when the partition members 1 are too thick, the moisture permeability of the partition members 1 decreases, whereas when the partition members 1 are too thin, the partition members 1 may be damaged during the manufacturing process of the element structuring units or the total heat exchange element due to an imbalance in the strength between the partition members 1 and the spacing members 5 or due to too low a material strength of the partition members 1. It is possible to manufacture the top plate member 15 by using the same material as the base material for the partition members 1.
  • the spacing members 5 have water retention properties, and a material having water retention properties (hereinafter, a "water retentive material”) is used as a material for the spacing members 5.
  • a material having water retention properties include materials obtained by impregnating paper, woven cloth, or nonwoven cloth made of cellulose fiber with a water-absorbing resin or by applying a water-absorbing resin to the same.
  • a material for the spacing members 5 it is also possible to use a material obtained by impregnating woven cloth or nonwoven cloth made of synthetic fiber having no water retention properties with a water-absorbing resin or by applying a water-absorbing resin to the same, or a material-blended paper made of cellulose fiber and a resin, because these materials also have water retention properties, although only slight. It should be noted, however, that the water retention amounts of the spacing members 5 become smaller when any of these materials is used.
  • each of the spacing members 5 so as to be thick.
  • the spacing members 5 alone are configured to be too thick, a problem will arise where the strengths of the spacing members 5 and the partition members 1 become imbalanced, so that deformation may occur during the manufacturing process of the element structuring units or the total heat exchange element.
  • configuring the spacing members 5 so as to be thick can be a cause of an increase in the costs.
  • a flame retardant to each of the spacing members 5, as long as the water retention properties thereof are not inhibited.
  • the flame retardant include materials that are often used in the process of arranging papers to be flame retardant, fire-proof or the like, such as guanidine salts e.g., guanidine hydrochloride, guanidine sulfate, guanidine sulfamate, and inorganic salts e.g., ammonium sulfamate, ammonium phosphate, ammonium sulfate, calcium chloride, and magnesium chloride.
  • guanidine salts e.g., guanidine hydrochloride, guanidine sulfate, guanidine sulfamate, and inorganic salts e.g., ammonium sulfamate, ammonium phosphate, ammonium sulfate, calcium chloride, and magnesium chloride.
  • Each of the element structuring units is formed by joining one partition member 1 and one spacing member 5 by using an adhesive.
  • the element structuring units that are positioned adjacent to each other in the layer stacking direction as well as the element structuring unit 10f provided in the uppermost position and the top plate member 15 are also joined together by an adhesive.
  • each of the partition members 1 is a sheet-like member and each of the spacing members 5 is a corrugated-plate-like member
  • air flow passages Ps are formed in the space between the partition member 1 and the spacing member 5 in each of the element structuring units 10a to 10f, the space between the spacing member 5 included in any one of the element structuring units 10a to 10e and the partition member 1 included in the one of the element structuring units 10b to 10f that is positioned above the element structuring unit, and the space between the spacing member 5 included in the element structuring unit 10f and the top plate members 15.
  • the total heat exchange element 20 performs a latent heat exchanging process and a sensible heat exchanging process via the partition members 1, between air flows flowing in the air flow passages P formed below the partition members 1 and air flows flowing in the air flow passages P formed above the partition members 1.
  • one is an airflow (i.e., a primary air flow) that is taken into the inside of a building from the outside of the building, whereas the other is an airflow (i.e., a secondary air flow) that is discharged to the outside of the building from the inside of the building.
  • air flows Af 1 and other air flows Af 2 between which the heat exchanging processes are performed via the partition member 1 included in the element structuring unit 10d are indicated with arrows drawn with solid lines.
  • the total heat exchange element 20 that is configured as described above is characterized with the adhesive described above that is used for joining the partition members 1 and the spacing members 5 together.
  • the adhesive will be explained in detail, with reference to Fig. 2 .
  • Fig. 2 is a schematic cross-sectional view illustrating a joint portion and the surroundings thereof between the element structuring unit 10a and the element structuring unit 10b that is positioned above the element structuring unit 10a both of which are included in the total heat exchange element 20 described above.
  • the partition member 1 and the spacing member 5 are joined together by adhesive 3 that is applied to the rear surface side of a corrugated groove portion R of the spacing member 5.
  • the element structuring unit 10a and the element structuring unit 10b are joined together by adhesive 13 that is applied to the upper surface side of a corrugated ridge portion T of the spacing member 5 included in the element structuring unit 10a.
  • the adhesive 3 and the adhesive 13 exhibits insolubility to the water-soluble moisture absorbent that has been added to the partition members 1 or an aqueous solution of the water-soluble moisture absorbent.
  • the adhesive while the adhesive is in an unhardened state, the water-soluble moisture absorbent with which the partition members 1 are impregnated is not able to dissolve into the adhesive. Also, after the adhesive is hardened, the water-soluble adhesive and an aqueous solution of the water-soluble moisture absorbent are not able to seep into the adhesive.
  • Specific examples of the adhesive include organic-solvent-based adhesives (including non-aqueous emulsion-type adhesives) that do not contain water as a solvent, solventless reactive adhesives, and hot-melt adhesives.
  • the total heat exchange element 20 in which the partition members 1 and the spacing members 5 are joined together by the adhesive 3 and the adhesive 13 it is possible to inhibit the water-soluble moisture absorbent from moving into the spacing members 5 from the partition members 1 via the adhesive 3 and/or the adhesive 13, during the manufacturing process thereof, needless to say, and also, even after the manufacturing process.
  • the water-soluble moisture absorbent is not contained in the adhesive 3 and the adhesive 13.
  • the adhesive 3 and/or the adhesive 13 may allow a very small amount of the water-soluble adsorbent to dissolve into the adhesive or may allow a very small amount of the water-soluble adsorbent to seep into the adhesive.
  • the "unhardened state" of a hot-melt adhesive denotes a state in which the hot-melt adhesive is softened or melted.
  • the partition members 1 and the spacing members 5 are joined together by using the adhesive 3 and the adhesive 13.
  • the adhesive 3 and the adhesive 13 it is easy to enhance the latent heat exchange efficiency by adding a desired amount of moisture absorbent to the partition members 1.
  • the moisture absorbent from moving from the partition members 1 into the spacing members 5
  • the spacing members 5 have water retention properties, even if condensation has occurred in the total heat exchange element 20 so that the water-soluble moisture absorbent dissolves into the condensation water, it is possible to have the condensation water absorbed by the spacing members.
  • an apparatus such as an air-conditioning apparatus or a ventilator that is structured by using the total heat exchange element 20, it is possible to inhibit serious malfunctions such as the tracking phenomenon that may occur when the condensation water in which the water-soluble moisture absorbent has dissolved comes into contact with an electric power charging unit of such an apparatus.
  • the total heat exchange element 20 is easy to obtain a total heat exchange element having high latent heat exchange efficiency. Further, it is also easy to constitute an air-conditioning apparatus, a ventilator, or the like that has high reliability by using the total heat exchange element 20. In the case where the total heat exchange element 20 is used in an apparatus that is installed indoor like an air-conditioning apparatus or a ventilator, it is desirable to use a solventless reactive adhesive or a hot-melt adhesive as the adhesive 3 and the adhesive 13 so that no organic solvent is emitted therefrom and no odor is released therefrom.
  • the total heat exchange element 20 that is able to achieve the technical advantageous effects as described above by using a method that includes, for example, a unit manufacturing step of obtaining a plurality of element structuring units in each of which a partition member is joined with a spacing member having water retention properties by using an adhesive; and a layer stacking step of joining the element structuring units together by using an adhesive and obtaining the total heat exchange element in which the plurality of element structuring units are stacked in the manner of layers.
  • an adhesive exhibits insolubility to the water-soluble moisture absorbent or an aqueous solution of the water-soluble moisture absorbent is used.
  • such an adhesive is used into which the water-soluble moisture absorbent is not able to dissolve, while the adhesive is in an unhardened state, and into which the water-soluble moisture absorbent or an aqueous solution of the water-soluble moisture absorbent is not able to seep, after the adhesive is hardened.
  • the unit manufacturing step into a first sub-step and a second sub-step.
  • a long material used for making the spacing members 5 (cf. Fig. 1 ) having water retention properties is shaped into a corrugated-plate form so as to obtain a long corrugated-plate-like product.
  • the adhesive 3 (cf. Fig. 2 ) in an unhardened state is applied to apex portions of the corrugated ridges on one side of the corrugated-plate-like product.
  • a long material to which the water-soluble moisture absorbent has been added
  • the unhardened adhesive is hardened so that a long element structuring unit member is obtained by joining the long material used for making the partition members 1 with the corrugated-plate-like product.
  • the long element structuring unit member that has been obtained at the first sub-step is cut into pieces of a predetermined size, so as to obtain the plurality of element structuring units in each of which a partition member 1 and the spacing member 5 are joined together by the adhesive 3.
  • the obtained element structuring units correspond to the element structuring units 10a to 10f shown in Fig. 1 .
  • the adhesive 13 (cf. Fig. 2 ) in an unhardened state is applied to apex portions of the corrugated ridges of the spacing members 5 included in the element structuring units.
  • the element structuring units to which the unhardened adhesive i.e., the adhesive 13 in an unhardened state
  • the element structuring units to which the unhardened adhesive are sequentially stacked in the manner of layers, while determining the orientation of each of the element structuring units in such a manner that the corrugation stripes of the spacing member 5 in any one of the element structuring units are substantially orthogonal, in a planar view, to the corrugation stripes of the spacing member 5 in another one of the element structuring units that is positioned above or below the one of the element structuring units.
  • the top plate member 15 (cf. Fig. 1 ) is stacked on top of the uppermost element structuring unit.
  • the element structuring units that are positioned adjacent to each other in the layer stacking direction as well as the uppermost element structuring unit and the top plate member 15 are joined together so that the total heat exchange element 20 shown in Fig. 1 is obtained.
  • the long element structuring unit member one after another, by using, for example, equipment as shown in Fig. 3 .
  • the long material, used for making the spacing members and the long material used for making the partition members are shaped in rolls in advance, respectively.
  • Fig. 3 is a schematic'drawing illustrating an example of the equipment that is used to manufacture the long element structuring unit member one after another at the unit manufacturing step described above.
  • Equipment 120 shown in Fig. 3 is a single-facer apparatus.
  • the single-facer apparatus shapes a long material 5A used for making the spacing members 5 into a roll R 1 in advance, and also shapes a long material 1A used for making the partition members 1 (cf. Fig. 1 ) into a roll R 2 in advance.
  • the material 5A that is pulled out of the roll R 1 in the equipment 120 is first forwarded to a corrugator 101 including a pair of corrugating rollers 101a and 101b.
  • the corrugator 101 is configured so that the upper corrugating roller 101a in the form of a gear and the lower corrugating roller 101b also in the form of a gear rotate while being engaged with each other.
  • the material 5A is continuously shaped into the corrugated-plate form at the position where the corrugating roller 101a and the corrugating roller 101b are engaged with each other. As a result, a long corrugated-plate-like product 5B is manufactured one after another.
  • the corrugated-plate-like product 5B is forwarded in a predetermined direction by the lower corrugating roller 101b, and an adhesive 3a in an unhardened state is applied to the corrugated-plate-like product 5B by an application roller 103 while the corrugated-plate-like product 5B is being forwarded.
  • the adhesive 3a in the unhardened state is stored in an adhesive tank 107, while the circumferential surface of the application roller 103 is partially immersed in the adhesive tank 107. Also, the circumferential surface of the application roller 103 is substantially in contact with apex portions of gear teeth of the lower corrugating roller 101b.
  • the adhesive 3a in the unhardened state adheres to the circumferential surface of the application roller 103, so that the adhesive 3a is further applied to the one side of the corrugated-plate-like product 5B.
  • a squeezing roller 107 is disposed near the application roller 103. By adjusting the gap between the lower corrugating roller 101b and the squeezing roller 107, it is possible to adjust the amount of the adhesive 3a in the unhardened state to be applied to the corrugated-plate-like product 5B.
  • the adhesive tank 107 is provided with, for example, a heater (not shown), so that the hot-melt adhesive is melted by the heater, and the adhesive 3a in the unhardened state can be obtained.
  • the material 1A that is pulled out of the roll R 2 is introduced to a press roller 113 by two guide rollers 111a and 111b.
  • the press roller 113 is disposed so that the circumferential surface thereof is substantially in contact with apex portions of gear teeth of the lower corrugating roller 101b.
  • the press roller 113 forwards the material 1A in a predetermined direction, the material 1A is pressed so as to be in contact with the corrugated-plate-like product 5B.
  • the adhesive 3a in the unhardened state has been applied to the corrugated-plate-like product 5B as described above, the adhesive 3a in the unhardened state is hardened by using a predetermined means (not shown; e.g., a heater, an artificial light source that emits light in a predetermined wavelength range, an air blower that blows out warm air, or an air blower that blows out cold air) after the material 1A is pressed so as to be in contact with the corrugated-plate-like product 5B, so that the corrugated-plate-like product 5B and the material 1A are joined together by the hardened adhesive 3 (cf. Fig. 2 ).
  • a predetermined means not shown; e.g., a heater, an artificial light source that emits light in a predetermined wavelength range, an air blower that blows out warm air, or an air blower that blows out cold air
  • a long element structuring unit member 10A used for making the element structuring units is manufactured one after another.
  • the corrugating rollers 101a and 101b and the press roller 113 are heated to a predetermined temperature of, for example, approximately 150°C or higher so that it is easy to adjust the shape of the corrugated-plate-like product 5B.
  • a predetermined temperature for example, approximately 150°C or higher so that it is easy to adjust the shape of the corrugated-plate-like product 5B.
  • Fig. 3 the rotation directions of the rollers and the transport directions of the materials 1A and 5A are indicated with arrows drawn with solid lines.
  • the element structuring unit member 10A After that, by cutting the element structuring unit member 10A into pieces of the predetermined size, one by one, starting from an end of the element structuring unit member 10A while using a cutting machine, the element structuring units serving as the element structuring units 10a to 10f (cf. Fig. 1 ) are manufactured one after another.
  • the layer stacking step that is performed to obtain the total heat exchange element by stacking, in the manner of layers, the plurality of element structuring units that have been manufactured in this manner, it is possible to apply the adhesive to the element structuring units by using, for example, equipment of which a schematic drawing is shown in Fig. 4 .
  • Equipment 130 shown in Fig. 4 includes a pair of rollers 121a and 121b, an adhesive tank 123 in which an adhesive 13a in an unhardened state is stored, a squeezing roller 125 that is disposed near the roller 121b, and a transporting device (not shown).
  • Each of the element structuring units 10 is transported to the pair of rollers 121a and 121b by the transporting device, while being positioned in such a manner that the partition member 1 is on top, while the spacing member 5 is on the bottom.
  • the adhesive 13a in the unhardened state is applied to each of the element structuring units 10 at the pair of rollers 121a and 121b.
  • the plurality of element structuring units 10 are transported to the pair of rollers 121a and 121b at predetermined intervals.
  • the roller 121a on the upper side functions as a transporting roller that transports each of the element structuring units 10 in the predetermined direction.
  • a roller 120b on the lower side is partially immersed in the adhesive tank 123 and functions as an application roller for applying the adhesive 13a in the unhardened state to each of the element structuring units 10.
  • the adhesive 13a in the unhardened state adheres to the circumferential surface of the roller 121b, so that the adhesive 13a is further applied to the spacing member 5 included in each of the element structuring units 10.
  • the squeezing roller 125 is disposed near the roller 121b and removes excessive adhesive 13a in the unhardened state that has been adhered to the circumferential surface of the roller 121b.
  • the gap between the roller 121b and the squeezing roller 125 it is possible to adjust the amount of the adhesive 13a in the unhardened state to be applied to each of the element structuring units 10.
  • the adhesive tank 123 is provided with, for example, a heater (not shown), so that the hot-melt adhesive is melted by the heater, and the adhesive 13a in the unhardened state can be obtained.
  • the element structuring units 10 to which the adhesive 13a in the unhardened state has been applied by the equipment 130 are stacked in the manner of layers while being oriented in the predetermined directions, as explained above, and further, the top plate member 15 (cf. Fig. 1 ) is stacked on top of the uppermost element structuring unit.
  • a process of hardening the adhesive 13a that has been in the unhardened state is performed by using a predetermined means (not shown; e.g., a heater, an artificial light source that emits light in a predetermined wavelength range, an air blower that blows out warm air, or an air blower that blows out cold air).
  • a predetermined means not shown; e.g., a heater, an artificial light source that emits light in a predetermined wavelength range, an air blower that blows out warm air, or an air blower that blows out cold air.
  • a feed roller 133 that is disposed so as to be in contact with the circumferential surface of the application roller 103 and supplies the adhesive 3a in the unhardened state (i.e., the hot-melt adhesive that has been melted) to the circumferential surface of the application roller 103; a supply pipe 135 that supplies the melted hot-melt adhesive to an area in which the application roller 103 and the feed roller 133 rub against each other while being in contact with each other, from above the area; and an adhesive supply source (not shown) that sends the melted hot-melt adhesive into the supply pipe 135.
  • the configuration of the equipment 140 is the same as the configuration of the equipment 120 shown in Fig. 3 .
  • some of the constituent elements shown in Fig. 5 that are the same as the constituent elements shown in Fig. 3 are referred to by using the same reference characters as in Fig. 3 , and the explanation thereof will be omitted.
  • a hot-melt adhesive is used at the layer stacking step
  • the equipment 150 shown in Fig. 6 The equipment 150 shown in Fig.
  • a pair of rollers 141a and 141b includes: a pair of rollers 141a and 141b; a feed roller 143 that is disposed near the roller 141b and supplies the adhesive 13a in the unhardened state to the circumferential surface of the roller 141b; a supply pipe 145 that supplies the melted hot-melt adhesive to a border area between the roller 141b and the feed roller 143, from above the border area; an adhesive supply source (not shown) that sends the melted hot-melt adhesive into the supply pipe 145; and a transporting device (not shown).
  • the roller 141a on the lower side functions as a transporting roller that transports each of the element structuring units 10 in the predetermined direction.
  • the roller 141b on the upper side functions as an application roller for applying the adhesive 13a in the unhardened state to each of the element structuring units 10.
  • Each of the element structuring units 10 is transported to the pair of rollers 141a and 141b by the transporting device, while being positioned in such a manner that the partition member 1 is on the bottom, while the spacing member 5 is on top.
  • the adhesive 13a in the unhardened state is applied to each of the element structuring units 10 at the pair of rollers 141a and 141b.
  • Fig. 7 is a schematic cross-sectional view illustrating a joint portion and the surroundings thereof between an element structuring unit and another element structuring unit that is positioned above the element structuring unit both of which are included in an example of the total heat exchange element where the joining mode described above is used.
  • an element structuring unit 40a and another element structuring unit 40b that is positioned above and joined with the element structuring unit 40a are shown.
  • Some of the constituent elements shown in Fig. 7 that are the same as the constituent elements shown in Fig. 2 are referred to by using the same reference characters as in Fig. 2 , and the explanation thereof will be omitted.
  • Each of the element structuring units 40a and 40b includes the partition member 1 and a spacing member 35 that is joined with the partition member 1.
  • Each of the spacing members 35 includes: a base material 35A that is manufactured by using a water retentive material; and a thermal-adhesion-type resin layer 35B that is provided on the entirety of a lower surface of the base material 35A.
  • the thermal-adhesion-type resin layer 35B is formed by, for example, attaching a film or a sheet made of a thermal-adhesion-type resin such as polyethylene or ethylene-vinyl acetate copolymer (EVA), onto the one of the surfaces of the base material 35A by way of thermal fusion bonding.
  • a thermal-adhesion-type resin such as polyethylene or ethylene-vinyl acetate copolymer (EVA)
  • the sheet or the film may be porous or may not be porous.
  • the thermal-adhesion-type resin layer 35B is formed by using a porous film or a porous sheet, it is easy to enhance the water retention properties of the spacing member 35.
  • the thermal-adhesion-type resin layer 35B is formed by using a non-porous film or a non-porous sheet, it is easy to enhance the level of air permeation resistance of the spacing member 35.
  • the partition member 1 and the spacing member 35 included in each of the element structuring units 40a and 40b are joined together on the rear surface side of the corrugated groove portion R of the spacing member 35, by using the thermal-adhesion-type resin layer 35B as a hot-melt adhesive.
  • the element structuring unit 40a and the element structuring unit 40b are joined together by the adhesive 13 that is applied to the upper surface side of the corrugated ridge portion T of the spacing member 35 included in the element structuring unit 40a.
  • the thermal-adhesion-type resin layers 35B that function as the hot-melt adhesive exhibit insolubility to the water-soluble moisture absorbent that has been added to the partition members 1 or an aqueous solution of the water-soluble moisture absorbent.
  • the thermal-adhesion-type resin layers 35B are in an unhardened state, the water-soluble moisture absorbent with which the partition members 1 are impregnated is not able to dissolve into the thermal-adhesion-type resin layers 35B.
  • the thermal-adhesion-type resin layers 35B are hardened, the water-soluble adhesive and an aqueous solution of the water-soluble moisture absorbent is not able to seep into the thermal-adhesion-type resin layers 35B.
  • the element structuring units 40a and 40b are manufactured by using a single-facer apparatus, it is possible to melt the thermal-adhesion-type resin layers 35B by using a corrugator or a press roller included in the single-facer apparatus as a heat source.
  • resins expand or shrink only a little when absorbing moisture.
  • the thermal-adhesion-type resin layers 35B are configured so as to be thick, it is possible to inhibit deformation caused by expansion or shrinkage of the spacing members 35.
  • the total heat exchange element in which the joining mode for the partition members 1 and the spacing members 35 as described above is used, for the same reasons that are explained in the first embodiment about the total heat exchange element 20, it is easy to obtain a total heat exchange element having high latent heat exchange efficiency. Further, it is also easy to structure an air-conditioning apparatus, a ventilator, or the like that has high reliability by using the total heat exchange element. In addition, it is easy to reduce the time required to manufacture the total heat exchange element and to reduce the input energy required to manufacture the total heat exchange element. Consequently, it is easy to reduce the costs and to reduce environmental burdens on the surrounding environment.
  • a long element structuring unit member was manufactured by using equipment that is the same as the equipment 120 shown in Fig. 3 , while using, as a material for partition members, a long product obtained by impregnating a specially-processed paper with a predetermined amount of lithium chloride, which is a water-soluble moisture absorbent, the specially-processed paper having been obtained as a result of a process of crushing cellulose fiber (pulp) and having a thickness of approximately 300 ⁇ m and an air permeation resistance level of 5000 seconds or higher, and also using, as a material for spacing members, a long product made of white single-side-glazed high-quality paper having a thickness of approximately 80 ⁇ m.
  • an adhesive used for joining a corrugated-plate-like product obtained by shaping the material for the spacing members by using a corrugator and the material for the partition members together an ethylene-vinyl acetate copolymer resin (EVA)-based hot-melt adhesive having an open time (i.e., a usable time) of a number of seconds was used.
  • EVA ethylene-vinyl acetate copolymer resin
  • a melted substance obtained by heating the hot-melt adhesive to approximately 150°C was applied to the corrugated-plate-like product so that the application amount was approximately 25 g/m 2 .
  • the element structuring unit member was cut into pieces of a predetermined size so that a plurality of element structuring units were obtained.
  • a hot-melt adhesive having been made of a styrene-ethylenebutylene-styrene block copolymer (SEBS)-based elastomer and having an open time of approximately 20 seconds to 30 seconds was applied to the element structuring units by using equipment that is the same as the equipment 130 shown in Fig. 4 . In this situation, a melted substance was obtained by heating the hot-melt adhesive to approximately 180°C, and the application amount was approximately 45 g/m 2 .
  • SEBS styrene-ethylenebutylene-styrene block copolymer
  • the element structuring units were sequentially stacked in the manner of layers in such a manner that the corrugation stripes of the spacing member in any one of the element structuring units were substantially orthogonal, in a planar view, to the corrugation stripes of the spacing member in another one of the element structuring units that was positioned above or below the one of the element structuring units.
  • the top plate member was stacked on top of the uppermost element structuring unit.
  • the melted substance of the hot-melt adhesive made of the SEBS-based elastomer was hardened so that a total heat exchange element that had the same exterior appearance as the total heat exchange element 20 shown in Fig. 2 was obtained.
  • the partition members and the spacing members were joined together by using the same joining mode as shown in Fig. 2 .
  • a long product was prepared by impregnating a specially-processed paper with a predetermined amount of lithium chloride, which is a water-soluble moisture absorbent, the specially-processed paper having been obtained as a result of a process of crushing cellulose fiber (pulp) and having a thickness of approximately 300 ⁇ m and an air permeation resistance level of 5000 seconds or higher.
  • a material for spacing members a long product was prepared in which a film of which the main component was polyethylene and had a thickness of approximately 15 ⁇ m was attached, by way of thermal fusion bonding, to one of the surfaces of a base material made of a water-resistant paper having a thickness of approximately 85 ⁇ m.
  • the film functioned as a thermal-adhesion-type resin layer.
  • the material for the spacing members was shaped into a corrugated-plate-like product by using a corrugator, starting from an end of the material.
  • the film By using the film as a hot-melt adhesive, the material for the spacing members was joined with the material for the partition members, in such a manner that any portion of the material for the spacing members that had been shaped into the corrugated-plate-like product was subsequently joined with the material for the partition members.
  • a long element structuring unit member was obtained.
  • the element structuring unit member was cut into pieces of a predetermined size so that a plurality of element structuring units were obtained.
  • the element structuring units were stacked in the manner of layers under the same condition as the one used in Example 1, so that a total heat exchange element having the same exterior appearance as the total heat exchange element 20 shown in Fig. 1 was obtained.
  • the partition members and the spacing members were joined together by using the same joining mode as shown in Fig. 7 .
  • a long piece of flame-retardant paper (corresponding to Grade 2 Flame Retardancy defined in the Japanese Industrial Standards [JIS]) having a thickness of approximately 70 ⁇ m was used as a material for spacing members.
  • the adhesive used for manufacturing a long element structuring unit member and as the adhesive used for stacking a plurality of element structuring units in the manner of layers a substance obtained by adding water, for the purpose of adjusting the viscosity, to a vinyl-acetate-based emulsion adhesive, which is a water-solvent-type adhesive, was used. Except for these features, a total heat exchange element was manufactured under the same condition as the one used in Example 1.
  • the application amount of the adhesive used for manufacturing the long element structuring unit member was 14 g/m 2 .
  • the application amount of the adhesive used for stacking the plurality of element structuring units in the manner of layers was 29 g/m 2 .
  • Example 1 For each of the total heat exchange elements that were manufactured as Example 1, Example 2, and Comparative Example, temperature exchange efficiency (i.e., sensible heat exchange efficiency), moisture exchange efficiency (i.e., latent heat exchange efficiency), and total heat exchange efficiency in a high-humidity environment as well as temperature exchange efficiency, moisture exchange efficiency, and total heat exchange efficiency in a low-humidity environment were measured.
  • temperature exchange efficiency i.e., sensible heat exchange efficiency
  • moisture exchange efficiency i.e., latent heat exchange efficiency
  • total heat exchange efficiency in a high-humidity environment as well as temperature exchange efficiency, moisture exchange efficiency, and total heat exchange efficiency in a low-humidity environment were measured.
  • the levels of exchange efficiency in the high-humidity environment were measured under a condition that was compliant with an exchange efficiency measuring condition (i.e., a summer condition) according to JIS B8628 (total heat exchangers), whereas the levels of exchange efficiency in the low-humidity environment were measured under a condition that was compliant with an exchange efficiency measuring condition (i.e., a cooled-room condition) according to Standard 1060 Rating Air-to-Air Energy Recovery Ventilation Equipment defined by the Air-conditioning and Refrigeration Institute (ARI) in the USA, while using a method that was compliant with JIS B8628 (total heat exchangers).
  • the measured results are shown in a table in Fig. 8 .
  • each of the spacing members is able to hold two partition members with a predetermined interval therebetween, sheets that have been shaped into rectangular corrugations or triangular corrugations or a plurality of plate pieces may be used as the spacing members.
  • the overall shapes of each of the element structuring units and the total heat exchange element it is possible to select any shape, as necessary, according to the applications of the total heat exchange element to be manufactured and the performances that the total heat exchange element is expected to achieve.
  • the present invention is applicable to a total heat exchange element in any mode as long as the total heat exchange element is used in a stationary-type heat exchanger. It is possible to use the total heat exchange element according to the present invention in any of various apparatuses that are used for the purpose of air-conditioning or ventilating buildings, automobiles, vessels, and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Laminated Bodies (AREA)
EP07828155.7A 2007-06-29 2007-06-29 Élément d'échange thermique total et son procédé de fabrication Active EP2163842B1 (fr)

Applications Claiming Priority (1)

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PCT/JP2007/063166 WO2009004695A1 (fr) 2007-06-29 2007-06-29 Élément d'échangeur thermique total et son procédé de fabrication

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EP2163842A1 true EP2163842A1 (fr) 2010-03-17
EP2163842A4 EP2163842A4 (fr) 2013-07-03
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EP (1) EP2163842B1 (fr)
JP (1) JP5503285B2 (fr)
KR (2) KR20120051756A (fr)
CN (1) CN101688761B (fr)
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TWI600545B (zh) 2015-07-17 2017-10-01 財團法人工業技術研究院 除濕基材、除濕基材成形裝置及其成形方法
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Publication number Publication date
CN101688761B (zh) 2011-09-14
HK1139726A1 (en) 2010-09-24
JPWO2009004695A1 (ja) 2010-08-26
KR101160398B1 (ko) 2012-06-26
TW200900176A (en) 2009-01-01
EP2163842B1 (fr) 2014-10-08
CN101688761A (zh) 2010-03-31
JP5503285B2 (ja) 2014-05-28
US20100175859A1 (en) 2010-07-15
WO2009004695A1 (fr) 2009-01-08
KR20120051756A (ko) 2012-05-22
TWI313626B (fr) 2009-08-21
EP2163842A4 (fr) 2013-07-03
KR20100032376A (ko) 2010-03-25

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