WO2013157056A1 - 熱交換素子 - Google Patents
熱交換素子 Download PDFInfo
- Publication number
- WO2013157056A1 WO2013157056A1 PCT/JP2012/003841 JP2012003841W WO2013157056A1 WO 2013157056 A1 WO2013157056 A1 WO 2013157056A1 JP 2012003841 W JP2012003841 W JP 2012003841W WO 2013157056 A1 WO2013157056 A1 WO 2013157056A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rib
- partition member
- heat exchange
- spacing
- shielding
- Prior art date
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Classifications
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/147—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
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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
- 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
- F28D9/0062—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 spaced plates with inserted elements
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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
- F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated conduits
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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
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
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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
- F28F2230/00—Sealing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2240/00—Spacing means
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Definitions
- the present invention relates to a heat exchange element having a laminated structure for exchanging heat and humidity between fluids in an air conditioner that performs air supply from the outside to the room and exhaust from the room to the outside at the same time.
- a conventional heat exchange element employs a structure in which a partition member having gas shielding properties, heat transfer properties, and moisture permeability is sandwiched between interval holding members having a corrugated cross section, and overlapped with a plurality of layers at predetermined intervals. It was.
- the partition member is a rectangular flat plate
- the spacing member is a corrugated plate having a triangular cross-sectional shape. The spacing member is reversed 90 degrees between the partition members for each corrugated direction.
- Patent Document 1 There are some in which two-way fluid passages that are alternately stacked and pass the primary air flow and the secondary air flow are formed between the respective layers.
- the spacing member is corrugated, the effective area of the ventilation path formed between the partition members is reduced by the corrugated plate thickness, and the contact area between the partition member and the spacing member is large. There is a problem that the total heat exchange efficiency is lowered because the effective area of the heat exchangeable partition member is reduced.
- the spacing member is made of paper or the like, there is a problem in that the cross-sectional shape of the ventilation path is liable to collapse and the ventilation resistance is increased.
- Patent Document 2 a method of integrally molding a partition member and a resin by using a resin molded product instead of a corrugated plate as a spacing member of a heat exchange element has been used.
- This structure increases the degree of freedom of the shape of the heat exchange element, and there are some which have improved total heat exchange efficiency and reduced ventilation resistance.
- partition members created with higher density and higher density have been developed mainly for the purpose of reducing the amount of air leakage of the total heat exchange element and improving the humidity exchange efficiency. These have low air permeability (air permeability), excellent moisture permeability, and have very good properties as a partition member for the total heat exchange element, but at the same time have a large amount of expansion and contraction, and surface irregularities and voids inside the material. There is also a feature that there are few. For this reason, when such a partition member is used, the resin cannot sufficiently enter the gap inside the partition member, and the anchor effect of the joint cannot be sufficiently obtained, so that sufficient joint strength cannot be obtained.
- Patent Document 3 a method in which only a spacing member is integrally formed and then a partition member is pasted with an adhesive or the like.
- Patent Document a projection in which a cylindrical shape or a triangular shape is provided on a mold for molding the spacing member, and the partitioning member is suppressed by the convex portion and embedded in the spacing member.
- the interval holding member needs to have a certain thickness. For this reason, it is necessary to make the spacing member thicker, and there is a problem that the ventilation resistance is increased by increasing the air passage blockage, and as a result, the total heat exchange efficiency is lowered.
- the present invention has been made in view of the above-described problems, and uses a dense and high-density partition member with high performance, and a partition member produced by a change in temperature and humidity even in a rib shape of a thin spacing member.
- An object of the present invention is to obtain a heat exchange element having low ventilation resistance and high total heat exchange efficiency by suppressing separation of the joint portion with the interval holding member caused by the deflection.
- the present invention provides a primary airflow that is formed by laminating unit constituent members each including a partition member having heat transfer properties and moisture permeability and a spacing member that holds the partition member at a predetermined interval, and passes through a surface side of the partition member.
- the spacing member is A first shielding rib provided in parallel with the direction in which the primary airflow flows on both sides of the surface of the partition member; A second shielding rib provided in parallel with the direction in which the secondary airflow flows on both sides of the rear surface of the partition member; A first spacing rib connected to the second shielding rib and provided in parallel between the first shielding ribs at predetermined intervals; A second spacing rib connected to the first shielding rib and provided in parallel at predetermined intervals between the second shielding ribs; A separation-suppressing rib is provided on the space-holding member and a semi-facing surface when viewed from the
- the heat exchange element according to the present invention has a structure in which the partition member is sandwiched between resins, a high-performance partition member having a high density and a high density is used. By suppressing the separation of the joint portion with the spacing member caused by the deflection of the partition member caused by the change, a heat exchange element having low ventilation resistance and high total heat exchange efficiency can be obtained.
- FIG. 1 is a perspective view of a heat exchange element according to Embodiment 1 of the present invention
- FIG. 2 is a perspective view of a unit component member according to Embodiment 1 of the present invention.
- the heat exchange element 1 includes a partition member 3 having heat conductivity, moisture permeability, and shielding properties for exchanging heat passing through the front and back, and a spacing member that holds the partition member 3 at a predetermined interval.
- 4 and the unit constituting member 2 formed by the deflection suppressing rib 7 that suppresses the deflection of the partition member 3 are inverted by 90 degrees for each sheet and alternately stacked, and passes the front side of the partition member 3.
- the primary airflow A and the secondary airflow B passing through the back side of the partition member 3 exchange heat and moisture via the partition member 3.
- the partition member 3 serves as a medium through which heat and moisture are transmitted when heat and humidity are exchanged between the primary airflow A and the secondary airflow B.
- the temperature difference (or water vapor partial pressure difference) of the heat (or water vapor) in the air flow on the high temperature side (or the humid side) is utilized on both sides of the partition member 3 to The temperature (humidity) is exchanged by shifting from the (high humidity side) to the low temperature side (or low humidity side) via the partition member 3.
- the partition member 3 needs to prevent mixing of the primary airflow A and the secondary airflow B, and to suppress the transfer of carbon dioxide, odor components, etc. between the airflows.
- the partition member 3 is a dense and high-density material having a density of 0.95 [g / cm 2 ] or more and an air permeability resistance (JIS: P8628) of 200 seconds / 100 cc or more. What has moisture permeability is good.
- the raw material is Japanese paper, flame retardant paper containing inorganic additives, other specially processed paper, paper mixed with resin and pulp, and the like.
- Moisture permeable membranes that have been treated with chemicals to impart functionality such as flame retardancy, polyurethane-based resins containing oxyethylene groups with moisture permeability, polyester-based resins containing oxyethylene groups, and terminal or side chains
- a porous sheet (nonwoven fabric, expanded PTFE membrane, etc.) bonded to a water-insoluble hydrophilic polymer thin film formed of a resin containing a sulfonic acid group, amino group, hydroxyl group, carboxyl group, etc. by heat or an adhesive.
- a sensible heat exchanger it is a resin sheet or resin film such as polystyrene-based ABS, AS, PS, polyolefin-based PP, PE, etc., which has only heat transfer and gas shielding properties.
- the partition member 3 thoroughly beats cellulose fiber (pulp) to fibrillate the fiber, and after making paper using the fiber, calendering with a super calendar or the like ( The manufacturing method which performs crushing) is used.
- the partition member 3 manufactured by this manufacturing method has a thickness of about 20 to 60 ⁇ m, a density of 0.9 g / cm 3 or more to almost 1 g / cm 3 or larger, and a normal paper is also available. Compared to (thickness of about 100 to 150 ⁇ m, density of about 0.6 to 0.8 g / cm 3 ), it has a dense and high-density structure.
- the spacing member 4 has a role of keeping the height of the ventilation path constant when the unit constituent members 2 are stacked.
- the spacing member 4 constitutes an outer frame of the heat exchange element 1, and in order to prevent air leakage from both ends of the heat exchange element 1, shields provided at both ends in parallel with the airflow direction.
- a plurality of ribs 5 and a plurality of spaced ribs 6 are provided in parallel with the shielding ribs 5 at predetermined intervals, and the interval ribs 6 keep the intervals of the partition members 3 in the stacking direction and form the ventilation paths when the heat exchange elements 1 are stacked. ing.
- the shielding rib 5 is formed at the peripheral edge of the unit component member 2, and the first shielding rib 5 a provided in parallel with the direction in which the primary airflow A flows on both sides of the surface of the partition member 3, It is comprised from the 2nd shielding rib 5b provided in parallel with the direction where the secondary airflow B flows on both sides of the back surface of the partition member 3, respectively.
- the spacing rib 6 is connected to the second shielding rib 5b, and is connected to the first shielding rib 5a and the first shielding rib 5a provided in parallel between the first shielding ribs 5a at predetermined intervals. It is comprised with the 2nd space
- a plurality of deflection suppressing ribs 7 are provided between the adjacent spacing ribs 6 at predetermined intervals in parallel with the spacing ribs 6 so as to suppress air passage blockage due to the deflection of the partition member 3.
- the deflection suppression rib 7 is connected to the second shielding rib 5b, and the first deflection suppression rib 7a provided in parallel between the first spacing ribs 6a at predetermined intervals, and the first shielding rib. 5a, and a second deflection suppressing rib 7b provided in parallel between the second spacing ribs 6b at predetermined intervals.
- the deflection suppressing rib 7 is formed to be lower and narrower than the spacing holding member 4, and the shielding rib 5, the spacing rib 6, and the deflection suppressing rib 7 are displayed on both the front and back sides of the partition member 3. And the back is formed 90 degrees apart.
- the deflection suppressing rib 7 has a thin and thin shape so as to suppress the pressure loss of ventilation as much as possible and not to disturb the heat transfer area and moisture permeable area of the partition member 3. Therefore, it is desired that the deflection suppressing rib 7 has a low rib height and a thin rib width.
- the rib height of the deflection suppressing rib 7 is preferably less than 1/2 of the rib height of the spacing rib 6 so as not to interfere (contact) with the upper and lower deflection suppressing ribs 7 at the time of lamination. Moreover, since the rib width of the deflection suppressing rib 7 becomes an impediment to the heat transfer area and the moisture permeable area, it is desirable that the bending suppression rib 7 be as thin as possible by molding.
- the unit constituent member 2 has a substantially square shape (when the primary airflow A and the secondary airflow B are orthogonal to each other) or a parallelogram shape (when the primary airflow A and the secondary airflow B cross each other).
- the shielding rib 5 is generally designed wider than the spacing rib 6.
- the width of the rib be as narrow as possible. The narrow width also reduces the amount of resin used.
- the resin used for the spacing member 4 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. By forming the ribs with resin in this manner, it is possible to suppress deformation due to the humidity of the spacing member 4 and to configure a stable ventilation path. In addition, these resins can be made flame retardant by adding a flame retardant, or an inorganic component can be added to improve dimensional stability and strength. Further, depending on the purpose, it is possible to add a foaming agent (physical foaming agent / chemical foaming agent) to foam the resin to reduce the amount of resin.
- a foaming agent physical foaming agent / chemical foaming agent
- FIG. 3 is an enlarged view of a portion C in FIG. 2 according to Embodiment 1 of the present invention.
- the present invention has a structure in which both sides of the partition member 3 are sandwiched from both sides by the second deflection suppressing rib 7 b and the peeling suppressing rib 8.
- the peeling suppression rib 8 has a shape substantially equivalent to the second deflection suppression rib 7b sandwiched from the opposite side through the partition member 3. Further, one end portion of the peeling suppression rib 8 is joined to the first deflection restraining rib 7a, and the other end portion is joined to the first shielding rib 5a.
- the height of the separation suppressing rib 8 is not less than the thickness of the partition member 3 and not more than 15%, preferably not more than 10% of the height of one ventilation path. It is necessary to keep it down. In addition, it is desirable that not only the height but also the shape thereof does not have a large resistance to the airflow so as not to hinder the airflow contacting with the separation suppressing rib 8.
- the second deflection suppression rib 7b and the peeling suppression rib 8 do not have a sufficient anchor effect between the partition member 3, but the second deflection suppression rib 7b, the peeling suppression rib 8 and the partition member 3 are not Bonded by van der Waals force, hydrogen bond, chemical bond.
- FIG. 4 is a cross-sectional view of the peeling prevention rib 8 according to the first embodiment of the present invention.
- the cross-sectional square shape which is the pattern of FIG. 4A has been described.
- the cross-sectional shape in the flow direction of the airflow in contact with the separation suppressing rib 8 is a shape with less turbulence of the airflow, such as a mountain shape, a trapezoidal shape, or an elliptical shape.
- the partition member 3 is perpendicular to the joint surface.
- the peeling suppression rib 8 can hold the partition member 3 against the force in the direction of peeling off the acting partition member 3.
- one end portion of the peeling prevention rib 8 is joined to the first deflection restraining rib 7a, and the other end portion is joined to the first shielding rib 5a. The deformation of can be suppressed.
- one end of the peeling suppression rib 8 is joined to the first deflection restraining rib 7a, and the other end is joined to the first shielding rib 5a. It is not necessary to join the first deflection suppressing rib 7a and the first shielding rib 5a at the portion.
- the separation of the partition member 3 can be suppressed by the weight of the separation suppression rib 8 simply by sandwiching both surfaces of the partition member 3 with the separation suppression rib 8 and the second deflection suppression rib 7b.
- the partition member 3 is sandwiched between the second deflection suppression rib 7b and the peeling suppression rib 8.
- the partition member 3 is configured with the first deflection suppression rib 7a, the first shielding rib 5a, Even if the structure is sandwiched between the two shielding ribs 5b, the first spacing ribs 6a, the second spacing ribs 6b, and the peeling restraining ribs 8, the same effect can be obtained.
- the peeling suppression rib 8 is provided on all of the first shielding rib 5a, the second shielding rib 5b, the first spacing rib 6a, the second spacing rib 6b, the first deflection suppressing rib 7a, and the second deflection suppressing rib 7b. It may be provided in a part or part. By increasing the number of places where the separation suppressing ribs 8 are provided, the effect of suppressing separation increases.
- the heat exchange element according to the first embodiment has a structure in which the partition member is sandwiched between resins, a high-performance partition member having a high density and a high density is used. By suppressing the separation of the joint portion with the spacing member caused by the deflection of the partition member caused by the change in temperature and humidity, a heat exchange element with low ventilation resistance and high total heat exchange efficiency can be obtained.
- FIG. 5 is an enlarged view of a portion C in FIG. 2 according to Embodiment 2 of the present invention. Since the second embodiment is the same as the first embodiment except for the structure of the peeling suppression rib, the description will focus on only the structure of the peeling suppression rib.
- the partition member 3 is sandwiched between the second deflection suppression rib 7b and the peeling suppression rib 9, and partly penetrates (the second deflection suppression rib 7b across the partition member 3). And the peeling suppression rib 9 are integrated). However, if the peeling suppression rib 9 is too large, the point that obstructs the airflow flowing through the flow path is the same as in the first embodiment.
- FIG. 6 is a cross-sectional view of a mold in the manufacturing process of the peeling suppressing rib 9 according to the second embodiment of the present invention.
- the partition member 3 is set in the upper mold 10 provided with the upper mold recess 10a which is a recess having the shape of the peeling prevention rib 9 so that the upper mold recess 10a is closed ( S1, S2).
- die 11 provided with the lower metal mold
- the lower mold 11 has a resin injection port 12 through which molten resin can be injected.
- a space formed by the partition member 3 and the lower mold recess 11a is referred to as a space A13
- a space formed by the partition member 3 and the upper mold recess 10a is referred to as a space B14.
- a molten resin obtained by melting the thermoplastic resin is injected from the resin injection port 12 provided in the lower mold 11 (S4). As the molten resin is poured, the space A13 gradually fills with the molten resin.
- the partition member 3 Since the injection pressure of the molten resin at the time of injection molding is sufficiently high, a force is applied toward the space B14 where the pressure is low, and the partition member 3 is pierced (S5). At this time, the partition member 3 breaks the vicinity of the center of the partition member 3 that partitions the space A13 and the space B14 which are the most pressure-applied portions. When the partition member 3 is broken, the pressure in the space A13 is released in the direction of the space B14, and the molten resin is injected into the space B14 and gradually fills up (S6). Thereby, the bending suppression rib 7 is shape
- the partition member 3 becomes a structure where a part penetrates and is pinched
- FIG. 1 when the partition member 3 is pierced with the molten resin, the high-pressure molten resin first pushes the partition member, the partition member 3 gradually expands, and finally reaches or exceeds the breaking elongation of the partition member 3. Torn. If the height of the upper mold concave portion 10a is low, the molten resin adheres to the wall surface of the upper mold concave portion 10a when the partition member 3 extends, and the molten resin does not break the upper mold concave portion 10a. Will be filled.
- the partition member 3 be torn.
- the height of the upper mold recess 10a in other words, the separation suppressing rib 9
- the relationship between the height H and the width of the contact portion of the upper mold recess 10a with the partition member 3, in other words, the minimum width dimension W of the contact surface with the partition member 3 of the separation suppressing rib 9, is important. It is desirable that / W is large, and it is more preferable that H / W ⁇ 0.5.
- FIG. 7 is a cross-sectional view of the peeling suppressing rib 9 according to the second embodiment of the present invention.
- the cross-sectional shape in the flow direction of the airflow in contact with the airflow is preferably a shape with less turbulence of the airflow such as a mountain shape.
- the trapezoidal cross section as shown in FIG. 7C can improve the releasability from the mold in addition to the effect of reducing the resistance of the air flowing through the ventilation path.
- views (d) to (f) as viewed from the H direction in FIG. (D) is a so-called conical shape in which the shape of the portion where the partition member 3 and the peeling suppression rib 9 are in contact is circular, and the highest sectional shape of the peeling suppression rib 9 is circular.
- (E) is a so-called elliptical cone shape in which the shape of the portion where the partition member 3 and the peeling suppressing rib 9 are in contact is elliptical, and the cross-sectional shape of the highest point of the peeling suppressing rib is also elliptical.
- the elliptical cone shape is a longitudinal shape with respect to the air flow.
- (f) is a so-called mixed cone-elliptical cone type in which the shape of the portion where the partition member 3 and the peeling suppression rib 9 are in contact is circular, and the cross-sectional shape of the highest point of the peeling suppression rib 9 is elliptical.
- the elliptical cone shape is a longitudinal shape with respect to the air flow. Since the peeling suppression rib 9 is provided on the deflection suppression rib 7, the spacing rib 6, and the shielding rib 5, it cannot protrude from these ribs.
- the partition member 3 is sandwiched between the second deflection suppression rib 7b and the separation suppression rib 9, so that the partition member 3 extends and deforms in a high-humidity environment and is perpendicular to the joint surface.
- the peeling suppression rib 9 can hold the partition member 3 against the force in the direction of peeling the acting partition member 3.
- the partition member 3 In addition to the structure in which the partition member 3 is sandwiched between the second deflection suppression rib 7b and the peeling suppression rib 9, a part of the structure penetrates (the second deflection suppression rib 7b and the peeling suppression rib 9 are integrated with the partition member 3 in between). Therefore, compared with the case where the partition member 3 is sandwiched between the second deflection suppression rib 7b and the peeling suppression rib 8 as in the first embodiment, the anchor effect due to the resin entering the unevenness of the pierced surface is more effective. There is an effect that a strong bond is obtained and a stronger bond is possible. Moreover, since the volume of the resin used as the peeling suppression rib 9 is also smaller than that of the first embodiment, the amount of resin used is also reduced.
- Resin is flame retardant by adding a flame retardant, or by adding inorganic components to improve dimensional stability and strength, or depending on the purpose, a foaming agent (physical foaming agent, chemical foaming agent) can be added to add resin It is the same as in the first embodiment in that it is possible to reduce the amount of resin by foaming.
- a foaming agent physical foaming agent, chemical foaming agent
- the partition member 3 is sandwiched between the second deflection suppression rib 7b and the stripping suppression rib 9, and partly penetrates (the second deflection suppression rib 7b and the stripping suppression across the partition member 3).
- the partition member 3 is divided into the first deflection suppression rib 7a, the first shielding rib 5a, the second shielding rib 5b, the first spacing rib 6a, the second spacing rib 6b, and the peeling restraining rib 9. Even if the structure is sandwiched between and partially penetrated, the same effect can be obtained.
- the peeling suppression rib 9 is provided on all of the first shielding rib 5a, the second shielding rib 5b, the first spacing rib 6a, the second spacing rib 6b, the first deflection suppressing rib 7a, and the second deflection suppressing rib 7b. It may be provided in a part or part. By increasing the number of places where the peeling suppression ribs 9 are provided, the effect of suppressing peeling increases.
- FIG. 8 is an explanatory diagram of an arrangement interval of the separation suppressing ribs of the heat exchange element according to the second embodiment of the present invention.
- 8 is a cross-sectional view of the second deflection suppression rib 7b and the peeling suppression rib 9 as viewed from the direction F of FIG.
- FIG. 8A is a diagram in which a unit component member 2 having three peeling suppression ribs 9 is laminated on a second deflection suppression rib 7b that connects between the first shielding rib 5a and the nearest first deflection suppression rib 7a. is there.
- the height of the ventilation path is g [mm]
- the arrangement interval of the separation suppressing ribs 9 is p [mm]
- the dimensional change rate when the partition member 3 is expanded is ⁇ .
- the dimensional change rate ⁇ is obtained by dividing the length of expansion of the partition member 3 by the reference of the partition member before expansion.
- the dimension of the expansion part of the partition member is defined as the dimension of the expanded part when the partition member 3 is fully expanded after being left in an environmental condition where the relative humidity is as close as possible to 100% RH.
- the separation suppressing rib 9 is arranged in the direction of the air flow as much as possible in one ventilation path as shown in FIG. .
- the separation suppressing ribs 9 are also arranged in a straight line parallel to the side wall of the ventilation path.
- the peeling suppression ribs 9 in the flow path in which a curved part exists, it is desirable to arrange the peeling suppression ribs 9 side by side on a straight line substantially parallel to the wall surface of these ventilation paths. Even when the ventilation path expands and contracts stepwise, it is desirable to provide the separation suppressing rib 9 along the flow line of the flowing fluid.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
前記間隔保持部材は、
前記仕切部材の表面の両側にそれぞれ前記一次気流が流れる方向と並行に設けられた第一遮蔽リブと、
前記仕切部材の裏面の両側にそれぞれ前記二次気流が流れる方向と並行に設けられた第二遮蔽リブと、
前記第二遮蔽リブと接続され、前記第一遮蔽リブの間を所定間隔ごとに並行して設けられた第一間隔リブと、
前記第一遮蔽リブと接続され、前記第二遮蔽リブの間を所定間隔ごとに並行して設けられた第二間隔リブと、で構成され、
前記間隔保持部材と前記仕切部材の接合部分の仕切部材からみて前記間隔保持部材と半対面に剥離抑制リブを設け、前記仕切部材を前記間隔保持部材と剥離抑制リブで挟み込んだことを特徴とする。
本発明の実施の形態1について図面を参照して説明する。図1は本発明の実施の形態1に係る熱交換素子の斜視図であり、図2は本発明の実施の形態1に係る単位構成部材の斜視図である。
間隔リブ6は、第二遮蔽リブ5bと接続され、前記第一遮蔽リブ5aの間を所定間隔ごとに並行して設けられた第一間隔リブ6aと、第一遮蔽リブ5aと接続され、第二遮蔽リブ5bの間を所定間隔ごとに並行して設けられた第二間隔リブ6bとで構成される。
なお、この遮蔽リブ5と間隔リブ6の高さは仕切部材3が湿気を含んで膨張しても風路が閉塞されない高さにする必要がある。
具体的には、たわみ抑制リブ7は、第二遮蔽リブ5bと接続され、第一間隔リブ6aの間を所定間隔ごとに並行して設けられた第一たわみ抑制リブ7aと、第一遮蔽リブ5aと接続され、第二間隔リブ6bの間を所定間隔ごとに並行して設けられた第二たわみ抑制リブ7bとで構成される。
本発明は図3に示すように、仕切部材3の両面を第二たわみ抑制リブ7bと剥離抑制リブ8で両側から挟む構造となっている。
剥離抑制リブ8は仕切部材3を介して反対側から挟み込む第二たわみ抑制リブ7bとほぼ同等の形状を有している。また、この剥離抑制リブ8の一端部は第一たわみ抑制リブ7aと接合し、他端部は第一遮蔽リブ5aと接合している。
ただし、剥離抑制リブ8が大きすぎると、流路を流れる気流の妨げとなるため、極力薄いことが望ましい。但し薄すぎても仕切部材3の変形する力に勝てなくなるので、剥離抑制リブ8の高さは仕切部材3の厚さ以上でかつ1つの通風路高さの15%以下、望ましくは10%以下に抑える必要がある。また、剥離抑制リブ8と接触する気流の妨げにならないために、高さだけでなくその形状も気流に対して大きな抵抗を持たないようにすることが望ましい。
なお、第二たわみ抑制リブ7b、剥離抑制リブ8は仕切部材3との間には十分なアンカー効果は有さないが、第二たわみ抑制リブ7b、剥離抑制リブ8と仕切部材3の間はファンデルワールス力や、水素結合、化学結合によって接着されている。
また仕切部材3をたわみ抑制部材7bと剥離抑制リブ8で挟み込むことにより湿気を吸収する面積が小さくなるため、接合面の仕切部材3の伸び縮み量も小さくでき、変形に伴い発生する力も小さくなる。なお、この剥離抑制リブ8で仕切部材3を挟んだ(覆った)ことにより仕切部材3面積が減少しても、その部分の反対側は第二たわみ抑制リブ7bが存在するため熱交換可能面積が減少するわけではない。このため挟み込むことで熱交換効率が悪くなることはない。
なお、本実施の形態1で示した図3では、剥離抑制リブ8の一端部は第一たわみ抑制リブ7aと接合し、他端部は第一遮蔽リブ5aと接合しているが、必ずしも両端部で第一たわみ抑制リブ7a、第一遮蔽リブ5aと接合しなくてもよい。剥離抑制リブ8と第二たわみ抑制リブ7bで仕切部材3の両面を挟み込むだけでも剥離抑制リブ8の重みにより仕切部材3の剥離を抑制することができる。
本発明の実施の形態2について図面を参照して説明する。図5は本発明の実施の形態2に係る図2のC部分の拡大図である。なお、本実施の形態2は実施の形態1と剥離抑制リブの構造以外は同じであるため、剥離抑制リブの構造のみに着目して説明する。
ただし、剥離抑制リブ9は大きすぎると、流路を流れる気流の妨げとなる点は実施の形態1と同じであるため、極力小さいことが望ましい。
図6に示すように、まず、剥離抑制リブ9の形状をした凹部である上金型凹部10aを備えた上金型10に、仕切部材3を上金型凹部10aが塞がるようにセットする(S1、S2)。そして、たわみ抑制リブ7の形状をした凹部である下金型凹部11aを備えた下金型11をセットする(S3)。なお、この下金型11には溶融樹脂を注入できる樹脂注入口12を有している。このとき、上金型凹部10aと下金型凹部11aによって出来る空間が仕切部材3によって仕切られるようにセットする必要がある。また、仕切られた空間のうち仕切部材3と下金型凹部11aで構成された空間を空間A13、仕切部材3と上金型凹部10aで構成された空間を空間B14とする。続いて、熱可塑性樹脂を溶融した溶融樹脂を下金型11に設けられた樹脂注入口12から注入する(S4)。そして、溶融樹脂を注入していくと、次第に空間A13内に溶融樹脂で一杯になる。射出成形時の溶融樹脂の注入圧力は十分高いため、圧力が低い空間B14に向けて力がかかり、仕切部材3は突き破られる(S5)。このとき仕切部材3は一番圧力のかかる部分である空間A13と空間B14を仕切る仕切部材3の中心近傍部が破られる。そして仕切部材3が破れることで空間A13内の圧力は空間B14方向に開放され溶融樹脂は空間B14内に注入され、次第に一杯になる(S6)。これにより、空間A13によりたわみ抑制リブ7が成形され、空間B14により剥離抑制リブ9が成形される。そして仕切部材3はたわみ抑制リブ7と剥離抑制リブ9に一部分が貫通して挟まれる構造になる。但し、溶融樹脂で仕切部材3を突き破る際には、まず高圧の溶融樹脂が仕切部材を押し、仕切部材3が徐々に伸びていき、最終的に仕切部材3の破断伸び以上となった場合に破れる。仮に上金型凹部10aの高さが低い場合には、仕切部材3が伸びたときに上金型凹部10aの壁面へ付着してしまい仕切部材3が破れないまま溶融樹脂が上金型凹部10aに充填されることになる。このため、より確実に仕切部材3と溶融樹脂を接合するためには仕切部材3が破れるようにすることが望ましいが、そのためには上金型凹部10aの高さ、言い換えると剥離抑制リブ9の高さHと、上金型凹部10aの仕切部材3との接触部の幅、言い換えると剥離抑制リブ9の仕切部材3との接触面の最小幅寸法Wの関係が重要で、それらの比H/Wが大きいほうが望ましく、さらにはH/W≧0.5であることが好適である。
上記した図5の説明に際しては図7の(a)の断面楕円形状パターンの図を用いたが、通風路の空気の抵抗を考慮すると、を図7(b)のように、剥離抑制リブ9と接触する気流の流れ方向の断面形状が山型形状等、気流の乱れが少ない形状にするのが良い。特に、図7(c)のような断面台形形状にすると、通風路を流れる空気の抵抗を低減する効果に加えて、金型からの離型性の向上が図ることができる。
剥離抑制リブ9はたわみ抑制リブ7、間隔リブ6、遮蔽リブ5の上に設けられているため、これらのリブからはみ出る事は出来ない。このため、仕切部材3と剥離抑制リブ9が接する部分の形状が円形の場合には、楕円形の場合と比べ、仕切部材3を挟み込む面積が大きくすることが出来るため、(d)及び(f)が仕切部材を挟み見込む面積が大きくなり、接着力が大きい。また、いわゆる円錐型の剥離抑制リブ9よりも、通風路内を流れる空気の流れに対して長手形状(Lf>Lw)となっているいわゆる楕円錐型、円錐-楕円錐型の剥離抑制リブのである(e)、(f)の場合に通風抵抗が小さくなる。このため、仕切部材3の接着力と通風抵抗の低減の両方を満たすためには(f)である円錐-楕円錐混合型がより好適である。
なお、この剥離抑制リブ9は、第一遮蔽リブ5a、第二遮蔽リブ5b、第一間隔リブ6a、第二間隔リブ6b、第一たわみ抑制リブ7a、第二たわみ抑制リブ7bの全てに設けてもいいし一部に設けてもよい。剥離抑制リブ9を設ける箇所を増やすことで、剥離抑制の効果は大きくなる。
図8(a)は第一遮蔽リブ5aと直近の第一たわみ抑制リブ7aの間をつなぐ第二たわみ抑制リブ7b上に剥離抑制リブ9を3個備えた単位構成部材2を積層した図である。なお、本説明では第一遮蔽リブ5aと第一たわみ抑制リブ7aの間をつなぐ第二たわみ抑制リブ7b上の剥離抑制リブに着目しているがこれに限らない。
通風路の高さをg[mm]、剥離抑制リブ9の配置間隔をp[mm]、仕切部材3の膨張時の寸法変化率をσとする。寸法変化率σとは、仕切部材3の膨張分の長さを膨張する前の仕切部材の基準で割ったものである。なお、仕切部材の膨張分の寸法とは、相対湿度が100%RHに限りなく近い環境条件に仕切部材3を充分な時間放置した後の膨張しきった際の膨張した分の寸法と定義する。
直近の剥離抑制リブ9間を流れる空気の温度及び湿度は略同じであると考えることが出来るため、直近の剥離抑制リブ9間の上面と下面を構成する仕切部材3の対面する位置での伸びは同じであると考えることが出来る。そのため、上面及び下面を構成する仕切部材3が通風路の半分までそれぞれ閉塞してしまうと直近の剥離抑制リブ9間全体は完全に閉塞してしまう。このように上面又は下面の仕切部材3が通風路の半分までそれぞれ閉塞してしまう条件を以下に示す。
直近の剥離抑制リブ9間の上面又は下面の仕切部材3が十分膨張した後の仕切部材3の長さはp(1+σ)である。また仕切部材3により風路の半分を閉塞するのに必要な長さはp+2(g/2)である。このため、
(数1) p(1+σ)=p+2(g/2)
すなわち、
(数2) p=g/σ
の関係を満たすときに仕切部材3が通風路を完全に塞いでしまう。よって、仕切部材2が通風路を完全に塞がないためには、
(数3) p<g/σ
の関係を満たす必要がある。
上記(数3)の要件を満たすように剥離抑制リブ9を配置することで、仕切部材3が通風路を完全に閉塞してしまうという事態を回避することが出来る。
また、直近の剥離抑制リブ9間の上下面を構成する仕切部材3が完全に通風路を閉塞しなくても、仕切部材3同士が接着してしまうと、表面に施されたコーティングが剥がれるといった問題や、環境が変化し、仕切部材3がもとの長さに戻ろうとするときの回復速度が遅くなってしまうという問題が生じる。このため、好ましくは、直近の剥離抑制リブ9間の上下面を構成する仕切部材2が互いに接着しないように剥離抑制リブ9を配置することが望ましい。
仕切部材3が一番たわむのは、剥離抑制リブ9から距離が一番離れた位置である剥離抑制リブ9間の中間地点であるため、この中間地点が風路の高さg[mm]の中間地点に達したときに仕切部材2同士の接触が開始する可能性がある。一つの通風路の上面又は下面の仕切部材が十分膨張した後の仕切部材2の長さはp(1+σ)である。このため、
(数4) g/2=
すなわち、
(数5) p=
の関係を満たすときに通風路の上下面を構成する仕切部材3が互いに接着し始める。よって仕切部材3が互いに接着しないようにするためには、
(数6) p<
の関係を満たす必要がある。(数3)及び(数6)に示すように、剥離抑制リブ9の配置間隔は通風路の高さgに比例して、寸法変化率σに反比例する。このため、通風路の高さが高い場合は配置間隔を広げることができ、寸法変化率が大きい仕切部材を用いた場合は配置間隔を狭くする必要がある。
2 単位構成部材
3 仕切部材
4 間隔保持部材
5 遮蔽リブ
5a 第一遮蔽リブ
5b 第二遮蔽リブ
6 間隔リブ
6a 第一間隔リブ
6b 第二間隔リブ
7 たわみ抑制リブ
7a 第一たわみ抑制リブ
7b 第二たわみ抑制リブ
8 剥離抑制リブ
9 剥離抑制リブ
10 上金型
10a 上金型凹部
11 下金型
11a 下金型凹部
12 樹脂注入口
13 空間A
14 空間B
A 一次気流
B 二次気流
Claims (14)
- 伝熱性と透湿性を有する仕切部材と、前記仕切部材を所定間隔に保持する間隔保持部材と、を備えた単位構成部材を積層し、前記仕切部材の表面側を通過する一次気流と前記仕切部材の裏面側を前記一次気流と交差して通過する二次気流とが前記仕切部材を介して熱と湿度を交換する熱交換素子において、
前記間隔保持部材は、
前記仕切部材の表面の両側にそれぞれ前記一次気流が流れる方向と並行に設けられた第一遮蔽リブと、
前記仕切部材の裏面の両側にそれぞれ前記二次気流が流れる方向と並行に設けられた第二遮蔽リブと、
前記第二遮蔽リブと接続され、前記第一遮蔽リブの間を所定間隔ごとに並行して設けられた第一間隔リブと、
前記第一遮蔽リブと接続され、前記第二遮蔽リブの間を所定間隔ごとに並行して設けられた第二間隔リブと、で構成され、
前記仕切部材の両面を前記間隔保持部材とで挟み込む剥離抑制リブを備えたことを特徴とする熱交換素子。
- 前記剥離抑制リブは前記間隔保持部材のうち第一遮蔽リブ、第二遮蔽リブ、第一間隔リブ及び第二間隔リブの少なくともいずれか一つに設けたことを特徴とする請求項1記載の熱交換素子。
- 伝熱性と透湿性を有する仕切部材と、前記仕切部材を所定間隔に保持する間隔保持部材と、前記仕切部材のたわみを抑制するたわみ抑制リブと、を備えた単位構成部材を積層し、前記仕切部材の表面側を通過する一次気流と前記仕切部材の裏面側を前記一次気流と交差して通過する二次気流とが前記仕切部材を介して熱と湿度を交換する熱交換素子において、
前記間隔保持部材は、
前記仕切部材の表面の両側にそれぞれ前記一次気流が流れる方向と並行に設けられた第一遮蔽リブと、
前記仕切部材の裏面の両側にそれぞれ前記二次気流が流れる方向と並行に設けられた第二遮蔽リブと、
前記第二遮蔽リブと接続され、前記第一遮蔽リブの間を所定間隔ごとに並行して設けられた第一間隔リブと、
前記第一遮蔽リブと接続され、前記第二遮蔽リブの間を所定間隔ごとに並行して設けられた第二間隔リブと、で構成され、
前記たわみ抑制リブは
前記第二遮蔽リブと接続され、前記第一間隔リブの間を所定間隔ごとに並行して設けられた第一たわみ抑制リブと、
前記第一遮蔽リブと接続され、前記第二間隔リブの間を所定間隔ごとに並行して設けられた第二たわみ抑制リブと、で構成され、
前記仕切部材の両面を前記たわみ抑制部材とで挟み込む剥離抑制リブを備えたことを特徴とする熱交換素子。
- 前記剥離抑制リブは前記たわみ抑制リブのうち第一たわみ抑制リブ及び第二たわみ抑制リブの少なくともいずれか一つに設けたことを特徴とする請求項3に記載の熱交換素子。
- 前記間隔保持部材と前記剥離抑制リブとが、前記仕切部材を一部貫通して一体で繋がっていることを特徴とする請求項1乃至2のいずれかに記載の熱交換素子。
- 前記剥離抑制リブは、前記間隔保持部材のうち前記第一遮蔽リブ、前記第二遮蔽リブ、前記第一間隔リブ及び前記第二間隔リブの少なくともいずれか一つと、前記仕切部材を一部貫通して一体で繋がっていることを特徴とする請求項1乃至2のいずれかに記載の熱交換素子。
- 前記第一たわみ抑制リブ及び前記第二たわみ抑制リブの少なくてもいずれか一つと前記剥離抑制リブとが、前記仕切部材を一部貫通して一体で繋がっていることを特徴とする請求項3乃至4のいずれかに記載の熱交換素子。
- 前記剥離抑制リブと前記仕切部材との接触する部分の最小幅寸法をWとし、
前記剥離抑制リブの前記仕切部材からの高さをHとした場合において、
前記H及び前記Wは、H/W≧0.5
の関係を満たすことを特徴とする請求項5乃至7のいずれかに記載の熱交換素子。
- 前記剥離抑制リブの仕切部材と接触する部分の断面形状は略円形状で、
前記剥離抑制リブの最高点の断面形状は略円形状であることを特徴とする請求項5乃至8のいずれかに記載の熱交換素子。
- 前記剥離抑制リブの仕切部材と接触する部分の断面形状は略楕円形状で、
前記剥離抑制リブの最高点の断面形状は略楕円形状であり、
これらの略楕円形状は、空気の流れに沿って長手形状となっていることを特徴とする請求項5乃至8のいずれかに記載の熱交換素子。
- 前記剥離抑制リブの仕切部材と接触する部分の断面形状は略円形状で、
前記剥離抑制リブの最高点の断面形状は略楕円形状であり、
前記最高点の略楕円形状は、空気の流れに沿って長手形状となっていることを特徴とする請求項5乃至8のいずれかに記載の熱交換素子。
- 前記単位構成部材を積層することにより形成される通風路の高さをg、
前記仕切部材が膨張したときの膨張した分の長さを膨張する前の基準寸法で割った寸法変化率をσ、
前記剥離抑制リブの配置間隔をpとしたときに、
前記pは、p<g/σの関係を満たすことを特徴とする請求項5乃至11のいずれかに記載の熱交換素子。
- 前記剥離抑制リブを、通風路を流れる流体の流れに沿って配置することを特徴とする請求項5乃至13のいずれかに記載の熱交換素子。
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US14/386,614 US9664452B2 (en) | 2012-04-20 | 2012-06-13 | Heat exchange element |
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