JP2014142130A - Total heat exchange element partition member, total heat exchange element using the material, and heat exchange ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress reduction in the air volume of a total heat exchange element and suppress reduction in a ventilation amount even if the difference in temperature and humidity is large between an outside and inside of a room and dew condensation/freezing occur.SOLUTION: A total heat exchange element partition member 14 arranged between high-temperature air 15 and low-temperature air 16 includes two types of moisture permeable portions having different elongation percentages in a case of absorbing water. Out of the moisture permeable portions, a low elongation portion 17 lower in the elongation percentage is arranged near the high-temperature air. Out of the moisture permeable portions, a high elongation portion 18 higher in the elongation percentage is arranged near the low-temperature air.

Description

  The present invention relates to a partition member for a total heat exchange element having heat conductivity and moisture permeability, a total heat exchange element using the partition member for the total heat exchange element as a partition plate, and a heat exchange using the total heat exchange element The present invention relates to a shape ventilation device.

  2. Description of the Related Art Conventionally, a heat exchange type ventilator that exchanges heat between air supply and exhaust during ventilation is known as a device that can ventilate without impairing the effects of cooling or heating.

  The heat exchange type ventilator includes a heat exchange element for performing heat exchange, and the material has gas barrier properties (mainly carbon dioxide barrier properties) and heat transfer properties that prevent air supply and exhaust from intermingling. Desired. In particular, a total heat exchange element that exchanges humidity at the same time as temperature must also have high moisture permeability. In addition, when used in indoor and outdoor conditions such as cold or tropical areas, condensation and icing occur inside the element, so water resistance is also required.

  In order to realize these, the total heat exchange element partition member used for this type of total heat exchange element has the following configuration.

  That is, a partition member for a total heat exchange element disposed between a high-temperature high-temperature air flow and a low-temperature low-temperature air flow, wherein a hydrophilic polymer is converted into an aqueous solution as a hygroscopic substance to form a porous sheet. It became the structure made water-insoluble after coating.

  For example, see the following Patent Document 1 as a similar prior document.

JP 2008-14623 A

  The problem with the conventional example is that when the temperature and humidity difference is large both indoors and outdoors, dew condensation and icing occur in the air passage through which the high-temperature air inside the total heat exchange element flows, and the air passage is narrowed. Therefore, the air volume of high-temperature air is reduced with respect to low-temperature air, and the temperature of the entire total heat exchange element is reduced. As a result, the high-temperature air flowing inside the device is further cooled to increase condensation and icing, and a vicious cycle occurs in which the ventilation rate is reduced by reducing the air volume.

  Accordingly, an object of the present invention is to suppress a decrease in the air volume of the total heat exchange element and a decrease in the ventilation volume even when the temperature / humidity difference is large inside and outside and condensation or icing occurs.

  And in order to achieve this objective, this invention is a partition member for total heat exchange elements arrange | positioned between high temperature air and low temperature air, Comprising: When moisture is absorbed, two types of elongation ratios differ A moisture permeable portion, wherein, among the moisture permeable portions, the first moisture permeable portion having a low elongation rate is arranged on the high-temperature air side, and among the moisture permeable portions, the second moisture permeable portion having a high elongation rate is provided. It is characterized by being arranged on the low-temperature air side, thereby achieving the intended purpose.

  As described above, the present invention is a partition member for a total heat exchange element arranged between high-temperature air and low-temperature air, and includes two types of moisture-permeable portions having different elongation rates when moisture is absorbed, Among the moisture permeable portions, the first moisture permeable portion having a low elongation rate is arranged on the high temperature air side, and among the moisture permeable portions, the second moisture permeable portion having a high elongation rate is arranged on the low temperature air side. Even if the temperature / humidity difference is large indoors and outdoors, and condensation and icing occur, it is possible to suppress the decrease in the air volume of the total heat exchange element and the decrease in the ventilation volume. It can be done.

  That is, according to the present invention, since the partition member for total heat exchange elements includes two types of moisture-permeable portions having different elongation rates when moisture is absorbed, the partition member for total heat exchange elements absorbs moisture. Thus, it has the property of being distorted in an arc shape with the surface having a low elongation rate on the inside and the surface having a high elongation rate on the outside. That is, when the temperature / humidity difference is large inside and outside, and condensation and icing occur, the generated moisture is absorbed and the partition member for the total heat exchange element is distorted in an arc shape.

  At this time, the first moisture permeable portion having a low elongation rate is arranged on the high temperature air side, and the second moisture permeable portion having a high elongation rate is arranged on the low temperature air side, so that the air path on the high temperature air side is expanded. The partition member for the total heat exchange element is distorted in an arc shape. As a result, the air passage on the high-temperature air side that is constricted due to condensation and icing can be expanded by the properties of the partition member for the total heat exchange element, and it is possible to suppress a reduction in the air volume of the high-temperature air. Therefore, even when condensation and icing occur, it is possible to suppress a decrease in the air volume of the total heat exchange element and a decrease in the ventilation rate.

Schematic diagram showing an installation example of the total heat exchange ventilator according to the first embodiment of the present invention. Diagram showing the structure of the total heat exchange type ventilator A perspective view showing a total heat exchange element of the total heat exchange type ventilator An exploded perspective view showing a total heat exchange element of the total heat exchange type ventilator A perspective view showing a partition member for a total heat exchange element of the total heat exchange type ventilator Sectional view showing the state of condensation and icing of the conventional total heat exchange element of the total heat exchange type ventilator Sectional drawing which shows the mode of dew condensation and icing of the total heat exchange element of the present invention of the total heat exchange type ventilator

  Hereinafter, an embodiment of the present invention will be described.

(Embodiment 1)
In FIG. 1, reference numeral 1 denotes a house, and a total heat exchange type ventilation device 2 is installed indoors.

  For example, in winter in Japan, indoor air (an example of high-temperature air) is discharged to the outside through the total heat exchange ventilator 2 as indicated by white arrows.

  In addition, outdoor air (an example of low-temperature air) is taken into the room through the total heat exchange ventilator 2 as indicated by a black arrow.

  And while ventilating by this, the heat of indoor air is transmitted to outdoor air at the time of this ventilation, and the discharge | emission of inadvertent heat is suppressed.

  As shown in FIG. 2, the total heat exchange type ventilator 2 has a total heat exchange element 4 disposed in the main body case 3, and drives the fan 5, thereby sucking indoor air from the interior air port 6, and the total heat exchange element 4. Then, the air is discharged from the exhaust port 7 to the outside via the fan 5.

  Further, by driving the fan 8, outdoor air is sucked from the outside air port 9 and taken into the indoor through the air supply port 10 via the total heat exchange element 4 and the fan 8.

  Further, as shown in FIGS. 3 and 4, the total heat exchange element 4 is formed by mounting the total heat exchange element partition member 14 on the rectangular opening of the frame body 11, the high-temperature air-air channel rib 12, and the low temperature. Air exchange ribs 13 are alternately arranged at predetermined intervals, and heat exchange is performed by flowing the above-described high-temperature air 15 between adjacent frames 11 and then the above-described low-temperature air 16 between adjacent frames 11. It has a structure that makes it.

  In the winter season, the hot air 15 is in a state containing moisture due to heating, exhalation of people, and the like, and the low temperature air 16 is in a dry state. The high-temperature air 15 and the low-temperature air 16 respectively flow on both surfaces of the partition member for total heat exchange element 14, whereby the heat of the high-temperature air 15 is transmitted to the low-temperature air 16 by heat transfer via the partition member for total heat exchange element 14. It is done. In addition, moisture in the high-temperature air 15 is transmitted to the low-temperature air 16 by moisture transmission via the total heat exchange element partition member 14.

  At this time, for example, when the outdoor temperature is extremely low, the high-temperature air 15 is cooled to the dew point or less by the low-temperature air 16, thereby forming dew condensation / freezing 20 on the surface of the partition member 14 for the total heat exchange element.

  When the conventional partition member 19 is used as the partition member 14 for the total heat exchange element, the air passage through which the high-temperature air 15 flows is narrowed by condensation / freezing 20 as shown in FIG. Since the air volume of the high-temperature air 15 is reduced, the ventilation amount of the house 1 is insufficient. Furthermore, the amount of heat flowing into the total heat exchange element 4 is reduced by reducing the air volume of the high-temperature air 15. For this reason, since the temperature of the total heat exchange element 4 as a whole decreases and an environment in which condensation and icing 20 are more likely to occur is generated, a vicious cycle in which the ventilation amount of the house 1 is increasingly insufficient has occurred.

  In the present invention, as shown in FIG. 5, when the partition member for total heat exchange element 14 absorbs moisture as the first moisture permeable portion, the low elongation portion 17 having a relatively low elongation rate and the second permeability As the wet part, a high extension part 18 having a relatively high extension rate is provided. For this reason, as shown in FIG. 7, the total heat exchange element partition member 14 absorbs the dew condensation / freezing 20 and is distorted in an arc shape with the low extension portion 17 on the inside and the high extension portion 18 on the outside. That is, since the air path through which the high-temperature air 15 flows is distorted, the constriction of the air path due to condensation / freezing 20 is alleviated, and the decrease in the air volume of the high-temperature air 15 is suppressed. Can do. Furthermore, since the air path through which the low-temperature air 16 flows is slightly narrowed, the air volume of the low-temperature air 16 is reduced. For this reason, it becomes difficult for the temperature of the whole heat exchange element 4 to fall, and unlike the case where the said conventional partition member 19 is used, it can suppress changing to the environment where condensation and icing 20 occur easily. Therefore, the shortage of ventilation in the house 1 can be suppressed.

  Further, the partition member for total heat exchange element 14 is a low-extension moisture-permeable sheet that does not change much when wetted with moisture as the low-extension part 17, and absorbs moisture and expands well. As the high elongation portion 18, the two different types of moisture permeable sheets may be bonded together.

  By using two different types of moisture permeable sheets together as described above, it becomes easy to adjust the difference in elongation rate between the low extension part 17 and the high extension part 18 depending on the material, so that the ventilation amount shortage of the house 1 is suppressed. In addition to the effect described above, there is an effect that the distortion of the partition member 14 for the total heat exchange element can be adjusted according to the use environment of the total heat exchange type ventilator 2.

  As a method for laminating the sheets, known methods such as heat welding, graft polymerization, and a method using an adhesive can be used.

  In addition, the partition member 14 for the total heat exchange element has a through hole in a direction perpendicular to the surface, absorbs moisture into a low-extension porous sheet that does not change much when wetted with moisture, and is a hygroscopic substance that expands well. The portion containing no hygroscopic substance may be used as the low extension portion 17, and the portion containing the hygroscopic substance may be constituted as the high extension portion 18.

  As described above, the base member of the low extension part 17 and the high extension part 18 becomes the same by using the low extension porous sheet as a base material and containing the hygroscopic substance as the high extension part 18 therein. For this reason, in addition to the effect of suppressing the shortage of ventilation in the house 1, the low extension part 17 and the high extension part 18 peel off due to the extension difference between the low extension part 17 and the high extension part 18 when moisture is absorbed. Can be suppressed.

  The hygroscopic substance can be contained in the low-stretch porous sheet by dissolving the hygroscopic substance and applying and drying the low-stretch porous sheet, or by adding the hygroscopic substance and the low-stretch porous sheet in layers. Known methods such as a method of thickly inserting the hygroscopic substance into the low-stretch porous sheet by pressing, and a method of synthesizing the hygroscopic substance in the pores of the low-stretch porous sheet can be used.

  Further, a hydrophilic polymer may be used as a material for the highly stretchable moisture-permeable sheet or the hygroscopic substance constituting the highly stretched portion 18.

  Hydrophilic polymers have the property of catching water molecules between their molecular chains, so they have good water absorption and can be used as hygroscopic agents to improve linear heat exchange efficiency, and the water molecules swell between the molecular chains. As a result, the volume can be expanded and expanded.

  In this case, for example, a hydrophilic polymer composed of a hydrocarbon having a hydroxyl group, a sulfonic acid group, a carboxylic acid group, an amide group, a quaternary ammonium group or the like as a hydrophilic group, or a fluorine-based polymer also having a hydrophilic group. Examples include hydrophilic polymers.

  The extensibility of the high elongation part is 101% or more and 200% or less, and more preferably 105% or more, when the length when dried at 20 ° C. is 100%, and when sufficiently immersed in water. 130% or less is preferable. Examples of such a material having extensibility include the hydrophilic polymer as described above.

  The extensibility of the low elongation portion is, for example, 80% or more and 105% or less, more preferably 95% or more, when the length when dried at 20 ° C. is 100% and when immersed in water and sufficiently absorbed. It is preferably 105% or less. As such a material having extensibility, for example, a material obtained by graft polymerization of a hydrophilic polymer such as starch and a thermoplastic resin, a material having an extensibility of 100% or less, such as sufficiently saponified polyvinyl alcohol, Examples thereof include hydrophobic materials such as polyethylene, polyethylene terephthalate, polytetrafluoroethylene, and polypropylene, and inorganic materials such as glass, alumina, and silica.

  Moreover, it is good also as a structure which at least any one of the high temperature air wind path rib 12 or the low temperature air wind path rib 13 has penetrated the partition member 14 for total heat exchange elements.

  Since at least one of the high temperature air air passage ribs 12 and the low temperature air air passage ribs 13 penetrates the total heat exchange element partition member 14, the total heat exchange element partition member 14 is deformed at a high temperature. It is fixed by the air air passage rib 12 or the low temperature air air passage rib 13. For this reason, since the wind path through which the high temperature air 15 flows is more reliably distorted, the narrowing of the wind path due to condensation / freezing 20 is alleviated and the decrease in the air volume of the high temperature air 15 is suppressed. There is an effect that can be suppressed.

  Moreover, it is good also as a structure using the partition member 14 for the total heat exchange elements of the said structure for the total heat exchange element 4. FIG.

  With this configuration, even when the temperature / humidity difference is large indoors and outdoors, even if condensation and icing occur, the total heat exchange element that can suppress the decrease in the air volume of the total heat exchange element 4 and the decrease in the ventilation rate 4 can be obtained.

  Moreover, it is good also as a structure which used the total heat exchange element 4 of the said structure for the total heat exchange type | formula ventilation apparatus 2. FIG.

  With this configuration, even when there is a large temperature / humidity difference indoors and outdoors, condensation and icing occur, a total heat exchange type that can suppress a decrease in the air volume of the total heat exchange element 4 and suppress a decrease in ventilation. A ventilation device 2 can be obtained.

  Note that either one of the low-extension moisture-permeable sheet and the high-extension moisture-permeable sheet may be a porous member, and if there is no through-hole penetrating the total heat exchange element partitioning member 14, The moisture permeable sheet and the highly extensible moisture permeable sheet may be a porous member.

  As described above, the partition member for the total heat exchange element according to the present embodiment suppresses a decrease in the air volume of the total heat exchange element even when the temperature / humidity difference is large inside and outside and condensation or icing occurs. Since it is possible to suppress a decrease in the amount, it is useful as a partition member for a total heat exchange element used in a total heat exchange element, a heat exchange type ventilator or the like.

DESCRIPTION OF SYMBOLS 1 House 2 Total heat exchange type ventilator 3 Main body case 4 Total heat exchange element 5 Fan 6 Inside air port 7 Exhaust port 8 Fan 9 Outside air port 10 Air supply port 11 Frame 12 Hot air air channel rib 13 Low temperature air air channel rib 14 Partition member for total heat exchange element 15 High-temperature air 16 Low-temperature air 17 Low extension part 18 High extension part 19 Conventional partition member 20 Condensation / freezing

Claims (8)

A partition member for a total heat exchange element arranged between high-temperature air and low-temperature air, comprising two types of moisture-permeable portions having different elongation rates when moisture is absorbed, and among the moisture-permeable portions, The first heat-permeable portion having a low elongation rate is disposed on the high-temperature air side, and the second moisture-permeable portion having the high elongation rate is disposed on the low-temperature air side among the moisture-permeable portions. Partition member for exchange element. As the partition member for the total heat exchange element, a low-extension moisture-permeable sheet is used as the first moisture-permeable portion, and a high-extension moisture-permeable sheet is used as the second moisture-permeable portion, and these two different types of moisture-permeable sheets are attached. The partition member for a total heat exchange element according to claim 1, wherein the partition member is configured together. As the partition member for the total heat exchange element, a low-stretch porous material that does not contain the hygroscopic substance by containing a hygroscopic substance in a part of the low-stretch porous sheet having through holes in a direction perpendicular to the surface. The partition for a total heat exchange element according to claim 1, wherein the sheet portion is the first moisture-permeable portion, and the low-extension porous sheet portion containing the hygroscopic substance is the second moisture-permeable portion. Element. The partition member for a total heat exchange element according to claim 1, wherein a hydrophilic polymer is used as a material of the second moisture permeable portion. The partition member for a total heat exchange element according to claim 3, wherein the hygroscopic substance is a hydrophilic polymer. The total heat exchange element using the partition member for total heat exchange elements as described in any one of Claims 1-5. The total heat exchange element is a total heat exchange element having a shape in which ribs forming a ventilation path for ventilating the total heat exchange element and the partition members for the total heat exchange element are alternately stacked. The total heat exchange element according to claim 6, wherein the rib penetrates the total heat exchange element. A total heat exchange type ventilator using the total heat exchange element according to claim 6 or 7.

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