WO2013061419A1 - 全熱交換素子およびその製造方法 - Google Patents
全熱交換素子およびその製造方法 Download PDFInfo
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- WO2013061419A1 WO2013061419A1 PCT/JP2011/074666 JP2011074666W WO2013061419A1 WO 2013061419 A1 WO2013061419 A1 WO 2013061419A1 JP 2011074666 W JP2011074666 W JP 2011074666W WO 2013061419 A1 WO2013061419 A1 WO 2013061419A1
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- WIPO (PCT)
- Prior art keywords
- partition member
- heat exchange
- heat
- exchange element
- flow path
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0015—Heat and mass exchangers, e.g. with permeable walls
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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
- 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
- F28D9/0031—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 for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0037—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 for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- 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
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- 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 heat exchange element having a laminated structure that is provided in an air conditioner and performs heat exchange between fluids, and a method for manufacturing the same.
- total heat exchange element for example, those disclosed in Patent Documents 1 and 2 are widely used. These total heat exchange elements have a partition member having heat conductivity and moisture permeability, and a spacing member that is sandwiched between the partition members and holds the spacing between the partition members.
- the total heat exchange element has a basic structure in which these partition members and spacing members are stacked in a plurality of layers.
- the partition member is, for example, a rectangular flat plate.
- the spacing member is a corrugated plate formed into a sawtooth, sinusoidal, or substantially triangular cross-sectional waveform whose projection plane coincides with the partition member.
- the partition member and the spacing member are overlapped so that the waveform directions of the spacing members that sandwich the partition member are alternately 90 degrees or an angle close thereto.
- two systems of fluid passages that is, a fluid passage for passing the primary airflow and a fluid passage for passing the secondary airflow, are alternately configured between the layers of the total heat exchange element. That is, the primary airflow passes along the one surface side of the partition member and the secondary airflow passes along the other surface side.
- the characteristics required for the partition member of the total heat exchange element are low air permeability between the fluid flow paths through which the primary air flow and the secondary air flow pass, and high heat transfer and moisture permeability. This is to prevent the mixing of fresh outside air sucked indoors from the outside and dirty air exhausted indoors to the outside when using the total heat exchanger, and between the primary air flow and the secondary air flow. This is so that latent heat can be exchanged simultaneously with sensible heat. Further, it is also required that the ventilation resistance (also referred to as pressure loss or static pressure loss) when each airflow passes is as low as possible. This is to reduce the power consumption of the blower (fan, blower, etc.) that allows the airflow to pass for ventilation and to reduce the operating noise of the total heat exchanger.
- Patent Document 3 discloses a configuration in which injection molding is applied and a partition member is insert-molded with a resin. With such a configuration, the air flow resistance is reduced by reducing the area ratio of the spacing member (resin portion) to the partition member to ensure heat exchange efficiency and making the flow passage cross section rectangular.
- Such a method by injection molding may cause the partition member to bend under a high humidity condition, the height of the flow path becomes uneven on the primary air flow side and the secondary air flow side, and the ventilation resistance may be increased. Especially when the flow path height is small, the ventilation resistance tends to be high, and as a means to improve heat exchange efficiency, it is an obstacle to increase the heat transfer area of the heat exchange element by reducing the flow path height. There was a case.
- Patent Document 4 uses a moisture-permeable polyethylene film having high crystallinity and good dimensional stability even under high-humidity conditions, and paper mixed with the same resin as a partition member, and the problem of an increase in channel resistance under high-humidity conditions. We are trying to solve it. However, when a moisture-permeable polyethylene film is used, there is a problem that warping and shrinkage are likely to occur after the molded product is taken out. Therefore, when the resin of the spacing member is deformed and contracted after releasing, the insert-molded partition member and the spacing member may bend and the ventilation resistance may be increased.
- Patent Document 5 an inorganic filler such as glass fiber or carbon fiber is added to a resin to be molded, or foam molding is performed in which a high-pressure fluid or a supercritical fluid is finely foamed in a resin using a physical foaming agent. Used. Further, Patent Document 6 proposes a method in which the partition member is bonded after the interval holding member is first injection molded and sufficiently contracted.
- Patent Document 5 can suppress warping and shrinkage after taking out a molded product when they are added to the resin, the molding cycle is slowed down due to the decrease in fluidity of the molten resin, and mass productivity is reduced. There was a problem to do. Further, although the amount of resin used is reduced, there is a problem that the material cost is increased due to the additive. Moreover, since the contact surface of resin of a partition member and a space
- Patent Document 6 the one disclosed in Patent Document 6 is that when the partition member and the interval holding member are bonded together, the partition member must be sufficiently stretched to be bonded or welded, and the bonding process becomes complicated. There was a problem that productivity was lowered.
- the present invention has been made in view of the above, and can be molded with simple equipment, and by reducing the deflection of the partition member immediately after injection molding by a simple method as much as possible, reducing the draft resistance, heat
- An object of the present invention is to obtain a heat exchange element capable of improving exchange efficiency and productivity.
- the present invention provides a flow path formed by providing spacing members on both sides of a sheet-like partition member, and forming a flow path on one side of the partition member.
- a total heat exchange element that exchanges heat between an airflow flowing through a path and an airflow flowing through a flow path formed on the other side via a partition member, wherein the spacing member is partitioned using a resin
- the partition member is integrally formed with the member, and the partition member includes a functional layer having heat conductivity, moisture permeability, and gas shielding properties, and a heat shrink layer that shrinks at a predetermined temperature or more.
- the total heat exchange element according to the present invention can be molded with simple equipment, and by reducing the deflection of the partition member immediately after injection molding by a simple method as much as possible, reducing the ventilation resistance, improving the heat exchange efficiency, In addition, the productivity can be improved.
- FIG. 1 is a perspective view of a total heat exchange element according to the first embodiment of the present invention.
- FIG. 2 is a diagram illustrating a cross-sectional configuration of the partition member.
- FIG. 3 is an external perspective view of a unit component member including a spacing member and a partition member.
- 4A is a cross-sectional view taken along the line AA shown in FIG. 3 and shows a state immediately after forming the spacing member and releasing the mold.
- 4B is a cross-sectional view taken along the line AA shown in FIG. 3 and shows a state in which the partition member is heated after the mold is released.
- FIG. 5 is a diagram for explaining a heating member that heats the partition member.
- FIG. 6 is a flowchart showing a manufacturing procedure of the total heat exchange element according to the first embodiment of the present invention.
- FIG. 7 is a flowchart showing a manufacturing procedure of the total heat exchange element according to the second embodiment of the present invention.
- FIG. 1 is a perspective view of a total heat exchange element according to the first embodiment of the present invention.
- the total heat exchange element 100 includes a partition member 2 and a spacing member 3.
- the interval holding member 3 that holds the partition member 2 at a predetermined interval and the unit constituent members that are composed of the partition member 2 are alternately stacked so that the arrangement direction of the interval holding member 3 is different by 90 degrees. Configured.
- each layer sandwiched between the partition members 2 serves as a passage through which air passes, and a passage through which a primary airflow passes and a passage through which a secondary airflow passes are alternately configured for each layer. . Between the primary airflow and the secondary airflow, exchange of temperature and humidity is performed via the partition member 2.
- the partition member 2 is configured by bonding a highly air-permeable layer (heat-shrinkable layer) that contracts at a temperature higher than a certain temperature (functional layer) having heat conductivity, moisture permeability, and gas shielding properties.
- heat-shrinkable layer that contracts at a temperature higher than a certain temperature (functional layer) having heat conductivity, moisture permeability, and gas shielding properties.
- the partition member 2 is a medium that transmits heat and moisture when the temperature and humidity are exchanged between the primary airflow and the secondary airflow.
- the primary airflow passes along the one surface side of the partition member 2 and the secondary airflow passes along the other surface side by the configuration described above.
- the heat (or water vapor) in the air flow on the high temperature side (or the high humidity side in the case of moisture) is converted into the temperature difference (or water vapor partial pressure difference) via the partition member 2.
- the low temperature side or low humidity side
- the water vapor in the air stream on the high humidity side is transferred to the low humidity side through the partition member 2 using the water vapor partial pressure difference. Therefore, it is desirable that the partition member 2 is as thin as possible and has a high heat transfer rate and humidity transfer rate.
- the partition member 2 is required to prevent mixing of the primary airflow and the secondary airflow, and to suppress the transfer of carbon dioxide, odor components, etc. between the airflows.
- a material having air permeability resistance JIS P8628 of 200 sec / 100 cc or more as a partition member and having moisture permeability is preferable.
- a water-insoluble hydrophilic polymer thin film is used for the partition member 2 in order to satisfy these conditions.
- more specific materials include polyurethane resins containing moisture-permeable oxyethylene groups, polyester resins containing oxyethylene groups, sulfonic acid groups, amino groups, hydroxyl groups, and carboxyl groups at the terminals or side chains. Resin or the like is used.
- FIG. 2 is a diagram showing a cross-sectional configuration of the partition member 2.
- the partition member 2 is configured by bonding a heat shrinkable layer 2 a to the functional layer 2 b by a process such as adhesion or heat fusion.
- a film having normal heat transfer / moisture permeability and gas shielding is used for the functional layer 2b.
- a porous film having excellent tensile strength and dimensional stability is used for the heat shrink layer 2a.
- the partition member under the high humidity condition is supported by supporting the moisture permeable film at as small intervals as possible while maintaining the moisture permeability of the partition member 2 as much as possible. Can be prevented and air flow resistance can be reduced.
- a material having a function of contracting by heating in addition to the above-described function as the porous film is used as the heat-shrinkable layer 2a.
- a non-woven fabric containing a heat-shrinkable resin for example, a cyclic olefin resin or a polyolefin resin
- latent crimpable fibers in a woven fabric or a non-woven fabric can be used.
- the latent crimpable fiber is a fiber having a property that a helical crimp is developed and contracted by heating at a predetermined temperature.
- it is composed of an eccentric core-sheath type composite fiber or a side-by-side type composite fiber containing two types of thermoplastic polymer materials having different shrinkage rates as components. Examples thereof include those described in JP-A-9-296325 and Japanese Patent No. 2759331.
- the heat-shrinkable non-woven fabric may be a non-woven fabric containing other fibers such as rayon, cotton, hydrophilic acrylic fiber and the like together with latent crimpable fibers.
- the moisture-permeable material (functional layer 2b) is subject to expansion and contraction of the material itself due to environmental conditions (humidity, etc.). It is possible to improve the dimensional stability against changes. Further, when the partition member 2 is heated, the partition member 2 as a whole contracts by being pulled by the contraction of the heat shrink layer 2a.
- the compressive strength in the plane direction of the functional layer 2b is sufficiently weaker than the compressive strength of the heat shrinkable layer 2a so as not to hinder the heat shrinkable layer 2a from shrinking.
- the strength in the plane direction of the sheet-like member such as the heat shrink layer 2a and the functional layer 2b greatly depends on the thickness. Therefore, it is desirable that the functional layer 2b is sufficiently thinner than the heat-shrinkable layer 2a (as a guide, the film thickness of the functional layer 2b is less than half the film thickness of the heat-shrinkable layer 2a) and the material strength is also low.
- FIG. 3 is an external perspective view of a unit component member composed of the spacing member 3 and the partition member 2.
- interval holding member 3 has the shielding rib 3a and the space
- the shielding rib 3a has both ends in order to prevent air leakage from two sides (hereinafter referred to as both ends) perpendicular to the direction in which the airflow flows on the surface among the four sides in the plan view of the partition member 2.
- a plurality of the spacing ribs 3b are provided between the shielding ribs 3a at a predetermined spacing in parallel with the shielding ribs 3a.
- the shielding rib 3 a and the spacing rib 3 b as the spacing member 3 are formed on both surfaces of the partition member 2. Further, the shielding rib 3a and the spacing rib 3b formed on the one surface side of the partition member 2 are provided so as to be orthogonal to each other on the one surface side and the other surface side of the partition member 2.
- the spacing member 3 is formed using a resin.
- the spacing member 3 is manufactured by integrally molding the partition member 2 and the spacing member 3.
- the spacing member 3 is directly resin-molded with respect to the partition member 2.
- the partition member 2 is manufactured by putting the partition member 2 into a mold in which the shape of the shielding rib 3a and the spacing rib 3b is carved and molding it before resin molding.
- maintains the space
- the shielding rib 3a and the spacing rib 3b formed on the one surface side of the partition member 2 may be provided so as to cross each other on the one surface side and the other surface side of the partition member 2.
- the resin used for the spacing member 3 is polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), polystyrene (PS), acrylonitrile-styrene (AS), polycarbonate (PC), and other general resins in a desired shape. Any material that can be molded may be used.
- the mold temperature does not exceed the heat shrink temperature of the heat shrink layer 2a of the partition plate. If the mold temperature exceeds the heat shrinkage temperature, the heat shrink layer 2a of the partition member shrinks before shrinkage after the molding of the spacing member 3 starts, and the aim of the present invention cannot be achieved. In other words, a material having a heat shrinkage starting temperature higher than the mold temperature at the time of molding the spacing member 3 is used for the heat shrinkable layer 2a.
- a flame retardant may be added to these resins to make them flame retardant, or an inorganic component may be added to improve dimensional stability and strength.
- a foaming agent physical foaming agent / chemical foaming agent may be added to foam the resin to reduce the amount of resin.
- FIG. 4A is a cross-sectional view taken along the line AA shown in FIG. 3, and shows a state immediately after the spacing member 3 is formed and the mold is released.
- 4B is a cross-sectional view taken along the line AA shown in FIG. 3 and shows a state in which the partition member 2 is heated after the mold is released.
- the partition member 2 may bend on its surface in the state immediately after the spacing member 3 is molded and the mold is released. Accordingly, the partition member 2 is heated to contract the heat-shrinkable layer 2a, thereby eliminating the deflection that has occurred immediately after the release, as shown in FIG.
- the heating method for the partition member 2 is not particularly limited as long as it is a method capable of heating at a temperature higher than the heat shrinkage temperature set for each substance constituting the heat shrinkable layer 2a.
- the interval holding member 3 is more than the partition member 2 when the heat shrinkage temperature of the heat shrinkable layer 2 a is equal to or higher than the softening temperature of the resin constituting the interval holding member 3. May soften first.
- the spacing member 3 may be deformed by the contraction force when the partition member 2 contracts. Therefore, it is desirable that the heat shrink temperature of the heat shrink layer 2 a of the partition member 2 is equal to or lower than the softening temperature of the spacing member 3.
- FIG. 5 is a view for explaining a heating member for heating the partition member 2.
- the heating member 50 shown in FIG. 5 is a metal plate in which irregularities are formed in accordance with the shape of the spacing member 3.
- the unevenness of the heating member 50 is such that when the heating member 50 is pressed against the partition member 2, only the tip 50 a of the convex portion contacts the partition member 2, and the heating member 50 hardly contacts the spacing member 3. It has become.
- the partition member can be heated without heating the spacing member 3. Therefore, if the partition member 2 can be heated without heating the spacing member 3 as in the heating member 50, the heat shrink temperature of the heat shrink layer 2 a is equal to or higher than the softening temperature of the resin constituting the spacing member 3. Even if it exists, the deformation
- the heat shrinkage rate of the heat shrinkable layer 2a is equal to or higher than the heat shrinkage rate after molding of the resin used as the spacing member 3.
- the heat shrinkage rate of the heat shrinkable layer 2a is small, it may not be possible to obtain the amount of shrinkage necessary to eliminate the deflection, and it may be difficult to eliminate the deflection of the partition member 2.
- the heat shrinkage rate of the heat shrinkable layer 2a is large, it becomes easy to obtain a shrinkage amount necessary for eliminating the deflection.
- the amount of shrinkage can be adjusted by adjusting the heating time to the heat-shrinkable layer 2a, so that the deflection is eliminated more completely. Is possible.
- FIG. 6 is a flowchart showing a manufacturing procedure of the total heat exchange element 100 according to the first embodiment of the present invention.
- the partition member 2 and the spacing member 3 are integrally formed to produce a unit component member (step S1).
- the partition member 2 is heated using the heating member 50 for each unit constituent member to eliminate the deflection (step S2).
- the unit constituent members are stacked and fixed by adhesion or heat fusion (step S3). Thereby, the total heat exchange element 100 as shown in FIG. 1 is manufactured.
- the unit constituent members are stacked so that the direction in which the spacing members extend (direction of the fluid passage) differs 90 degrees (orthogonal) for each layer.
- the interval holding member 3 is integrally formed on both surfaces of the partition member 2 to form a unit component member. Therefore, in step S3, the interval holding member 3 is formed.
- the partition members 2 and the unit constituent members that are not present are stacked alternately.
- the interval holding member 3 is integrally formed on only one side of the partition member 2 to form a unit constituent member, only the unit constituent members may be laminated.
- the unit component member When the unit component member is heated and contracted too much, even if the spacing member 3 is not softened by heat, the unit component member is elastically deformed and warped. When the unit constituent member is warped, the laminated adhesion surface is not flat, and a part of the laminated surface that is not partially bonded may occur depending on the shape of the warp.
- the part where the adhesion is not made becomes a gap of the fluid passage, and the fluid escapes to another fluid flow path. If the primary air flow and the secondary air flow are mixed with each other due to the escape of the fluid to other fluid flow paths, odors, carbon dioxide, and other undesirable gas bodies are supplied from the exhaust air to the living room for the total heat exchanger. Since it becomes cloudy to air, it is not preferable. Therefore, it is necessary to adjust the heating time of the partition member as appropriate.
- the total heat exchange element 100 manufactured in this way has fluid passages through which a primary air flow and a secondary air flow pass as shown in FIG. 1, and each fluid passage has an approximately rectangular shape whose cross section is large and small. It becomes a collective structure in which small passages are alternately arranged.
- the cross-sectional shape of the flow path becomes a rectangular shape. Therefore, the equivalent diameter (the size of the circular tube when replaced with a circular tube with equivalent pressure loss.
- S is the cross-sectional area of the channel and the circumference of the channel is greater than the triangular channel with the same layer height and the same mountain pitch.
- L is obtained by 4S / L when L is set), and the pressure loss is reduced.
- the deflection of the partition member 2 due to the shrinkage of the resin after molding can be eliminated by the heat shrinkage of the partition member 2, the pressure loss is reduced as compared with the state in which the deflection is left.
- the partition member 2 may not be able to fully exert the function of total heat exchange.
- the surface of the partition member 2 is more effectively utilized, It is possible to improve the exchange efficiency and the humidity exchange efficiency.
- the total heat exchange element illustrated below was manufactured with the said manufacturing method.
- a polyurethane resin (thickness: about 20 ⁇ m) containing 30% oxyethylene groups was used.
- latent crimpable fiber core-sheath composite fiber having heat-shrinkability with ethylene-propylene random copolymer (EP) as a core component and polypropylene (PP) as a sheath component, Daiwa A heat-shrinkable non-woven fabric was used as a raw material manufactured by Boshin Co., Ltd., having a heat shrink start temperature of about 90 ° C.
- the functional layer 2b and the heat shrinkable layer 2a were laminated with heat to form a partition member 2, and cut into appropriate dimensions.
- the partition member 2 was set in a mold, and the spacing member 3 was integrally formed by injection molding of acrylonitrile-butadiene-styrene resin (ABS) [UMB ABS EX120, heat distortion temperature of about 80 ° C.].
- ABS acrylonitrile-butadiene-styrene resin
- the unit constituent members were formed so that the shielding ribs 3a and the spacing ribs 3b extend (orthogonal) in directions different by 90 degrees between the front and back of the partition member 2.
- the completed unit component is heated by the heating member 50.
- the tip 50a of the heating member 50 was pressed against the heat-shrinkable layer 2a of the partition member 2 for an arbitrary time, and the heat-shrinkable layer 2a was thermally contracted to eliminate the deflection of the partition member 2.
- the unit structural member was laminated
- MEK methyl ethyl ketone
- FIG. FIG. 7 is a flowchart showing a manufacturing procedure of the total heat exchange element according to the second embodiment of the present invention.
- the materials to be used are almost the same as those in the first embodiment.
- ABS resin is used for forming the spacing member 3, but instead, a unit constituent member is produced using PP resin. did.
- the thermal deformation temperature of the ABS resin is approximately the same as the thermal contraction start temperature (about 90 ° C.) of the thermal contraction layer 2 a of the partition member 2. Therefore, in the first embodiment, only the partition member 2 is heated using the heating member 50 to suppress the deformation of the spacing member 3.
- the thermal deformation temperature of the PP resin used for the spacing member 3 in the second embodiment is higher than the thermal shrinkage start temperature (about 90 ° C.) of the heat shrink layer 2a (about 115 ° C.).
- the thermal contraction temperature of the spacing member 3 is higher than the thermal contraction temperature of the thermal contraction layer 2a. If the entire unit component member is heated at a temperature lower than the heat deformation temperature, the deflection of the partition member 2 can be eliminated while suppressing the deformation of the spacing member 3.
- the total heat exchange element is manufactured by the following procedure. First, a unit constituent member is prepared (step S11), and the unit constituent members are laminated and bonded prior to the heating step (step S12), thereby completing the entire configuration of the total heat exchange element.
- Step S13 air that is equal to or higher than the heat shrinkage temperature of the heat shrink layer 2a and lower than the heat deformation temperature of the spacing member 3 flows down to the first flow path and the second flow path of the completed total heat exchange element 100. (Step S13), the deflection of the partition members 2 of a plurality of layers can be eliminated together.
- the control of the deflection amount of the partition member 2 can be adjusted by the time during which high-temperature air flows. Since heating is performed after the entire configuration of the total heat exchange element is completed, that is, after ensuring the rigidity of the entire total heat exchange element, the time for flowing high-temperature air becomes long, and even when the partition member 2 is contracted too much, Each layer becomes difficult to deform.
- the total heat exchange element illustrated below was manufactured with the said manufacturing method.
- a polyurethane-based resin film thickness: about 20 ⁇ m
- latent crimpable fiber core-sheath composite fiber having heat-shrinkability with ethylene-propylene random copolymer (EP) as a core component and polypropylene (PP) as a sheath component
- EP ethylene-propylene random copolymer
- PP polypropylene
- Daiwa A heat-shrinkable non-woven fabric was used as a raw material manufactured by Boshin Co., Ltd., having a heat shrink start temperature of about 90 ° C.
- the functional layer 2b and the heat shrinkable layer 2a were laminated with heat to form the partition member 2, and cut into appropriate dimensions.
- the partition member 2 was set in a mold, and the spacing member 3 was integrally formed by injection molding of polypropylene resin (PP) [manufactured by Nippon Polypro Co., Ltd., MA3H, thermal deformation temperature of about 115 ° C.].
- PP polypropylene resin
- the unit constituent members were formed so that the shielding ribs 3a and the spacing ribs 3b extend (orthogonal) in directions different by 90 degrees between the front and back of the partition member 2.
- the completed unit constituent members were laminated, and methyl ethyl ketone (MEK) was applied and welded to the contact portions when the four outer sides of the unit constituent members were laminated, thereby completing the entire configuration of the total heat exchange element.
- MEK methyl ethyl ketone
- the total heat exchange element according to the present invention is useful for a total heat exchange element in which a partition member and a spacing member are integrally formed.
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Abstract
Description
図1は、本発明の実施の形態1にかかる全熱交換素子の斜視図である。全熱交換素子100は、仕切部材2と、間隔保持部材3を備える。全熱交換素子100は、仕切部材2を所定間隔に保持する間隔保持部材3と、仕切部材2とからなる単位構成部材が、間隔保持部材3の配列方向が90度ずつ異なるように交互に積層されて構成される。
図7は、本発明の実施の形態2にかかる全熱交換素子の製造手順を示すフローチャートである。使用する材料等は上記実施の形態1にほとんど順ずるが、異なる点として実施の形態1では間隔保持部材3の成形にABS樹脂を用いたが、代わりにPP樹脂を用いて単位構成部材を作製した。
2a 熱収縮層
2b 機能層
3 間隔保持部材
3a 遮蔽リブ
3b 間隔リブ
50 加熱部材
50a 先端
100 全熱交換素子
Claims (7)
- シート状の仕切部材の両側にそれぞれ間隔保持部材を設けて流路を形成し、前記仕切部材の一方の側に形成された流路を流通する気流と他方の側に形成された流路を流通する気流との間で前記仕切部材を介して熱交換を行う全熱交換素子であって、
前記間隔保持部材は、樹脂を用いて前記仕切部材に一体成形され、
前記仕切部材は、伝熱性と透湿性と気体遮蔽性を有する機能層と、所定の温度以上で収縮する熱収縮層とを有して構成されることを特徴とする全熱交換素子。 - 前記熱収縮層として、不織布を用いることを特徴とする請求項1に記載の全熱交換素子。
- 前記不織布の熱収縮率は、前記間隔保持部材として使用する樹脂の熱収縮率よりも大きいことを特徴とする請求項1または2に記載の全熱交換素子。
- 前記仕切部材の熱収縮開始温度は、前記間隔保持部材の成形時の金型温度より高く、前記間隔保持部材用として使用する樹脂の軟化温度より低いことを特徴とする請求項1~3のいずれか1つに記載の全熱交換素子。
- シート状の仕切部材の両側にそれぞれ間隔保持部材を設けて流路を形成し、前記仕切部材の一方の側に形成された流路を流通する気流と他方の側に形成された流路を流通する気流との間で前記仕切部材を介して熱交換を行う全熱交換素子の製造方法であって、
伝熱性と透湿性と気体遮蔽性を有する機能層と、所定の温度以上で収縮する熱収縮層とを重ねて前記仕切部材を作製するステップと、
前記仕切部材に対して樹脂を用いて前記間隔保持部材を一体成形して単位構成部材を作製するステップと、
前記単位構成部材のうち前記熱収縮層を前記所定の温度以上に加熱するステップと、
前記所定の温度以上に加熱するステップの後に、前記単位構成部材を積層するステップと、を備えることを特徴とする全熱交換素子の製造方法。 - 前記熱収縮層を前記所定の温度以上に加熱するステップは、前記単位構成部材のうち前記熱収縮層のみに接触する加熱部材を用いて行われることを特徴とする請求項5に記載の全熱交換素子の製造方法。
- シート状の仕切部材の両側にそれぞれ間隔保持部材を設けて流路を形成し、前記仕切部材の一方の側に形成された流路を流通する気流と他方の側に形成された流路を流通する気流との間で前記仕切部材を介して熱交換を行う全熱交換素子の製造方法であって、
伝熱性と透湿性と気体遮蔽性を有する機能層と、所定の温度以上で収縮する熱収縮層とを重ねて前記仕切部材を作製するステップと、
前記単位構成部材を積層するステップと、
前記単位構成部材を積層するステップの後に、前記所定の温度以上の空気を前記流路に通過させるステップと、を備えることを特徴とする全熱交換素子の製造方法。
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