JP2000039278A - Total heat exchanging element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge chemical substances generated in a room to outdoors by laminating sheets fixed with styrene based ion exchanging resin having a chemically bonded ionization group in a molecule as moisture absorbent so that a large number of small through holes are provided. SOLUTION: A corrugated aluminum sheet 1 sprayed with moisture absorbent and a flat liner sheet 2 are wound around a boss 3 while being overlapped. The corrugated sheet 1 is coated, at the crest of corrugate, with adhesive containing antimicrobial agent and a honeycomb body is made rigid. In such a total heat exchanging element 5, styrene based ion exchanging resin Na type fine powder functions as moisture absorbent and the corrugated sheet 1 functions as a heat storage material along with the liner sheet 2. Various ion exchanging resins can be selected appropriately depending on the gas contained in the air and when a plurality of kinds of ion exchanging resins are employed, a plurality of kinds of gas contained in the air can be dealt with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a total heat exchange element for recovering sensible heat lost when ventilation is performed during cooling and heating.

[0002]

2. Description of the Related Art A hygroscopic agent such as silica gel, activated carbon, zeolite or the like is fixed on a sheet constituting the above total heat exchange element in order to perform latent heat exchange, that is, adsorption of moisture.
In summer, for example, high-temperature, high-humidity outside air is passed through the air-intake zone of the total heat exchange element, and the temperature and humidity of the air are reduced and supplied to a cooled room. The heat and humidity given to the total heat exchange element from the high-temperature and high-humidity outside air are returned to the return air and discharged outside as outdoor air.

[0003] However, such a conventional total heat exchange element adsorbs various odorous substances and other harmful gases and other substances contained in the return air or outside air to the moisture absorbent of the total heat exchange element during heat exchange. And gradually accumulate. It was sent indoors, causing odors in the room and causing a problem that was perceived by human smell.

[0004] The total heat exchange element has a heat storage means for sensible heat exchange and a moisture adsorption means for latent heat exchange. The moisture adsorbing means cannot return the moisture to the room unless the moisture is quickly adsorbed and easily desorbed. However, moisture adsorbents that absorb moisture quickly and are easy to desorb are generally easy to absorb and desorb other substances besides water, so that odor components are also absorbed and desorbed, and the odor components are returned to the room. There was a problem that it would.

For this reason, various techniques have been proposed for reducing the transfer of odor components in the total heat exchange element, for example, techniques using zeolite having pores having a diameter substantially equal to the diameter of water molecules as a moisture adsorbent.

[0006]

In the above-mentioned conventional total heat exchange element, the transfer of the odor component is reduced, but is not sufficient.
In addition, it is not always sufficient in that a trace amount of a chemical substance is discharged from a room without being adsorbed.

That is, the conventional total heat exchange element uses silica gel or zeolite as a moisture adsorbent, and the principle of adsorbing these moistures is that the adsorbent and water molecules are bonded by hydrogen bonds on the low humidity side. . Therefore, if only water molecules are adsorbed by this principle, only water molecules are basically adsorbed, but at the same time, a phenomenon that water enters the pores formed in the adsorbent by capillary action also occurs. In this case, polar substances are also adsorbed, and such substances move to the indoor side by desorption from the adsorbent.

In recent years, many gaseous chemical substances have been present in a room, and it has been difficult to effectively prevent the transfer of these chemical substances by a conventional total heat exchange element.

In other words, many chemical substances are used in adhesives and insect repellents used for furniture, wallpaper, etc., and, in recent years, various trace amounts of chemical substances are generated from homes and offices. It has been reported that chemicals cause chemical sensitivity.

The present invention has been made in view of the above-mentioned problems, and has an advantage that the transfer of the odor component is extremely reduced and the total heat exchange element can be discharged from the room even if the amount of gas contained in the air is very small. It is intended to provide.

[0011]

Means for Solving the Problems A sheet in which a styrene ion exchange resin having an ionizing group chemically bonded in a molecule is fixed as a moisture adsorbent is laminated and formed so as to have a large number of small holes.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to the first aspect of the present invention provides a sheet in which a styrene-based ion exchange resin having an ionizing group chemically bonded in a molecule is fixed as a moisture adsorbent and has a large number of small holes. It is formed by lamination and has the effect of not adsorbing various chemical substances regardless of whether the gas contained in the air is an acidic gas or a basic gas.

[0013]

EXAMPLE An adhesive was applied to the surface of an aluminum sheet coated with a melamine resin, and a powder of a styrene ion exchange resin having ionizing groups chemically bonded in the molecule was used as a moisture adsorbent from above the weight of the aluminum sheet. About 20-35%. For this production, a method disclosed in Japanese Patent Application Laid-Open No. 106396/1992 can be used.

Then, as shown in FIG. 1, a corrugated sheet 1 formed by waving an aluminum sheet sprayed with a moisture adsorbent and a flat liner sheet 2 are superposed and wound on a boss 3. At the time of this winding, corrugated sheet 1
Apply adhesive to the top of the wave. As a result, the corrugated sheet 1 and the liner sheet 2 are adhered to each other, and the wound honeycomb body becomes strong.

An antibacterial agent is mixed in the adhesive beforehand. Many antibacterial agents are commercially available, and among them, select one that is safe for the human body. For example, silver chloride is preferred since it has been used for a long time and its safety has been confirmed.

After being wound to a predetermined thickness, it is immersed in a thiabendazole solution as an antifungal agent, and thereafter, an outer peripheral plate 4 such as a galvanized steel sheet is wound around the outer peripheral portion, and the total heat exchange element 5
To complete. Thiabendazole is a safe fungicide that is also added to foods.

A styrene-based neutral ion exchange resin, Na type, can be used as the moisture adsorbent. As a more specific material, (DIAIO manufactured by Mitsubishi Chemical Corporation) can be used.
NSK 1B) or (Dowex ion HCR-S) manufactured by Dow Chemical Co., Ltd. can be used.

The styrene-based neutral ion-exchange resin is in a spherical state having a diameter of 0.4 to 0.6 mm immediately after it is produced. .

The total heat exchange element 5 of the present invention having the above structure is
The styrene-based neutral ion exchange resin Na-type fine powder functions as a moisture adsorbent. The corrugated sheet 1 and the liner sheet 2 made of an aluminum sheet function as a sensible heat storage material.

That is, among the conventional total heat exchange elements, those using silica gel or zeolite as a moisture adsorbent adsorb water molecules by hydrogen bonding or capillary action as a principle of adsorbing water. On the other hand, in the total heat exchange element 5 of the present invention, the moisture adsorbent is a styrene ion exchange resin having an ionizing group chemically bonded in the molecule, and the principle of moisture adsorption is hydration with the ion exchange group to adsorb. When a mixture of non-ion exchangeable substances such as hydrocarbon vapor and water vapor comes into contact with each other, only water molecules are selectively adsorbed. Here, the chemical formula of the styrene ion exchange resin having an ionizing group chemically bonded in the molecule used in the present invention is shown.

[0021]

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When a mixed gas of an ion-exchangeable substance and water vapor comes into contact, only the substance that can be ion-exchanged by ion exchange is selectively adsorbed together with water molecules. Then, the ion-exchangeable substance is adsorbed by the ionic bond without being easily desorbed.

In other words, in order to adsorb various substances and desorb the adsorbed substances, the ion exchange resin needs to be washed with a strongly acidic or strongly alkaline solution in a stoichiometrically large amount. Therefore, it does not desorb at the temperature at which it comes in contact with air at room temperature, and the ion-exchangeable substance gradually accumulates in the adsorbent, and is adsorbed until the adsorbing capacity becomes full. Then, only the water molecules are adsorbed thereafter.

In this way, the ion exchange resin as a moisture adsorbent does not adsorb and desorb substances other than water, and thus the transfer of odorous substances and chemical substances is extremely small.

The transfer of ammonia was tested for the total heat exchange element 5 of the present invention by the following method. That is, RA in FIG.
(Return gas) was charged with 35 ppm ammonia and passed through the total heat exchange element 5 to examine the amount of transfer to SA (air supply). The air conditions were such that the temperature of OA (outside air) was fixed at 35 ° C., the relative humidity was changed from 40% to 90%, the temperature of RA (return air) was fixed at 24 ° C., and the relative humidity was fixed at 55%.

The front wind speed of the total heat exchange element 5 was 3 m / s, and the rotation speed of the total heat exchange element 5 was 15 RPM. As a result, as shown in FIG. 2, the transfer rate of ammonia was extremely small. The flame-retardant paper in the graph of FIG. 2 is a paper obtained by impregnating a flame-retarded paper with a lithium chloride solution as a moisture absorbing agent. Indicated.

The transfer of isopropyl alcohol to the total heat exchange element 5 of the present invention was tested by the following method. That is, 35 ppm isopropyl alcohol was put into RA (return air) in FIG. 1 and passed through the total heat exchange element 5 to examine the amount of transfer to SA (air supply). The air conditions were such that the temperature of OA (outside air) was fixed at 35 ° C, the relative humidity was changed from 50% to 80%, the temperature of RA (return air) was 24 ° C, and the relative humidity was 5 ° C.
It was fixed at 5%. The wind speed in front of the total heat exchange element 5 was 3 m / s, and the rotation speed of the total heat exchange element 5 was 15 RPM.

As a result, as shown in FIG. 3, the transfer rate of isopropyl alcohol was 10% or less in the region where the relative humidity was 50% to 80%, which was extremely smaller than that of the conventional product.

As described above, the transfer rate of ammonia is about 36% or less in the range of relative humidity of 50% to 80%, which is lower than that of the conventional product using an adsorbent such as silica gel and that using a lithium chloride solution as an absorbent. Was extremely small.

When the total heat exchange element 5 is used as a total heat exchange element during ventilation in a room where cooling is performed in summer, the surface may be wet due to dew condensation. That is, when the room is being cooled, RA in FIG. 1 is low temperature and low humidity,
OA is high temperature and high humidity.

When the operation of the total heat exchange element 5 is stopped, the flow of air sent to the total heat exchange element 5 stops. R
The temperature immediately after moving from the zone in which A flows to the zone in which OA flows is low, and dew condensation may occur when touching OA.

If left in this state for a long period of time, it is considered that fungi may grow on the wetted portion due to dew condensation. However, since the fungicide is carried, the generation of fungi is prevented. In addition, a narrow gap is formed in the vicinity of the bonded portion between the corrugated sheet 1 and the liner sheet 2 because the two sheets are close to each other. Although the dew water accumulates in the gap, the bacteria do not propagate here because the antibacterial agent is mixed in the adhesive.

In the above embodiment, the corrugated sheet 1 and the liner sheet 2 are made of an aluminum sheet. However, a polyethylene terephthalate sheet, a polyester sheet, a flame-retarded paper or the like may be used.

Further, in the above embodiment, an example has been shown in which the pulverized moisture adsorbent is sprayed and adhered to the sheet material.
The moisture adsorbent may be dispersed in the liquid adhesive, and the sheet material may be immersed therein. This immersion may be performed before corrugating the sheet material, or may be performed after corrugating and processing into a honeycomb shape.

In the above embodiments, the styrene-based neutral ion exchange resin Na type fine powder was used as the moisture adsorbent.
A styrene-based ion exchange resin H-type, a styrene-based ion-exchange resin Li-type fine powder, a styrene-based ion-exchange resin K-type fine powder, or a styrene-based ion-exchange resin Ca-type fine powder can be used.

The above various ion exchange resins can be appropriately selected according to the atmosphere in which the total heat exchange element 5 is used, that is, according to the gas contained in the air. By using a mixture of a plurality of types of ion exchange resins instead of a single type, it is possible to cope with a plurality of types of gas contained in the air.

[0037]

As described above, the total heat exchange element of the present invention has a large number of small holes formed by fixing a styrene-based ion exchange resin having an ionizing group chemically bonded in a molecule as a moisture adsorbent. Since the moisture adsorbent selectively adsorbs only water molecules, the transfer of odorous substances and chemical substances is extremely reduced.

[0038] Therefore, the air passing through the total heat exchange element does not smell, and even if a chemical substance is generated in the room by operating the total heat exchange element, it can be discharged to the outside of the room. Substance hypersensitivity can be prevented.

Furthermore, there is no generation of molds and bacteria, and the mold and bacteria do not float in the air that has passed through the total heat exchange element, which is sanitary.

[Brief description of the drawings]

FIG. 1 is a perspective view of a total heat exchange element of the present invention.

FIG. 2 is a graph showing the transfer of odorous substances in the total heat exchange element of the present invention.

FIG. 3 is a graph showing the transfer of odorous substances in the total heat exchange element of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated sheet 2 Liner sheet 3 Boss 4 Peripheral plate 5 Total heat exchange element

Claims (4)

[Claims] 1. A total heat exchange method comprising laminating a sheet fixed with a styrene ion exchange resin having an ionizing group chemically bonded in a molecule as a moisture adsorbent so as to have a large number of small holes. element. 2. The total heat exchange element according to claim 1, wherein the sheets are laminated and formed into a honeycomb shape. 3. The total heat exchange element according to claim 1, further comprising a fungicide. 4. The total heat exchange element according to claim 1, wherein the sheet is laminated and formed with an adhesive, and the adhesive is mixed with an antibacterial agent.