JPH119942A - Sheets and elements for dehumidification or total heat exchange - Google Patents

Abstract

(57) Abstract: A sheet for dehumidifying or total heat exchange, and a device for dehumidifying or total heat exchanging formed by laminating these sheets in a honeycomb shape to prevent mold from forming, and to provide a sheet or element. To prevent odor from being generated in the supply air obtained by the treatment. An Ag sheet having an acidic group chemically bonded to a molecule and a counter cation in a dehumidifying or total heat exchange sheet or element sheet, and a part or all of the counter cation has a bactericidal effect. An organic polymer adsorbent, which is an ion such as Cu, Zn or the like, is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an antibacterial A
The present invention relates to a dehumidifying or total heat exchanging sheet and an element for dehumidifying or total heat exchanging using an organic polymer electrolyte type hygroscopic agent containing ions such as g, Cu, Zn, etc., having excellent antifungal and deodorizing properties. Things.

[0002]

2. Description of the Related Art Honeycomb elements for dehumidification or total heat exchange using an inorganic moisture absorbent such as zeolite, molecular sieve, silica gel, and alumina gel have been used for many years. The applicant of the present application has disclosed in Japanese Patent Application Publication No. Hei. 25,614 / 1993 and Japanese Patent Application Publication No. Heisei 518/1831 a honeycomb laminated body made of low-density paper mainly made of inorganic fibers, and impregnated with water glass. A dehumidifying element was proposed in which silica gel or metal silicate gel was formed and bound by dipping in an acid or metal salt aqueous solution.

[0003] These dehumidifying elements are used for dehumidifying and controlling air in all fields, such as the semiconductor industry, the film industry, the food industry, buildings, buildings containing a large number of people, and warehouses. However, no particular attention has been paid to its antifungal and deodorant properties. In particular, silica gel, zeolite, and the like are inherently hygroscopic agents that have the property of adsorbing and accumulating odors, and the generation of mold increases, and when the humidity rises during operation, significant odors occur depending on the type of these hygroscopic agents. Often polluted the environment.

[0004]

Zeolite and other molecular sieves are crystals having micropores with a constant diameter, in which polar adsorption sites are present, and not only water molecules but also ammonia and other polar molecules are present. Adsorbs well. A dehumidifying element composed of a honeycomb laminate using this adsorbent has a high dehumidifying performance in a low humidity region, but has a low pore volume in a high humidity region, so that the dehumidifying performance is inferior. Further, the polar odor molecules adsorbed during the operation are replaced with water molecules and come out into the gas phase when the processing air becomes high in humidity. Further, when polymerizable VOC (volatile organic compound) vapor is contained in the air, it undergoes a catalytic reaction in the pores to cause a polymerization reaction, thereby closing the pores of the element and drastically reducing the moisture absorbing performance.

A dehumidifying element obtained by forming a honeycomb laminate from low-density inorganic fiber paper and synthesizing and fixing silica gel thereto has excellent dehumidifying performance, but uses the above-mentioned zeolite and other inorganic absorbents. As in the case of the above, there is a disadvantage that a large amount of heat energy is required at the time of desorption and regeneration because the heat capacity of the moisture absorbent is large. Furthermore, silanol groups (SiOH) contained in silica gel adsorb polar odor molecules containing not only water molecules but also OH groups, NH groups, SH groups, etc. in the form of hydrogen bonds in a relatively low humidity environment. Polar molecules may also be adsorbed by polar bonds.

When these hygroscopic agents are suddenly placed in a humid environment, capillary condensation occurs in silica gel (B type) having large pores. (Matsuaki Shirahama, Toshimi Kuma, Yujiro Sakuragi: "Odor transfer was prevented." Abstract of the research presentation of the 58th Annual Meeting of the Society of Chemical Engineers, Japan). Odor molecules are dissolved in water in the liquid phase, and are released to the outside through pores. This tendency is small because silica gel (A type) having small pores hardly causes capillary condensation, but the release of odor molecules cannot be completely suppressed.

[0007] Further, the dehumidifying sheet and the dehumidifying element using the above-mentioned two kinds of inorganic absorbents are stopped when they are stopped for a long time, or when they are operated for a long time under high temperature and high humidity. It is not possible to prevent the occurrence of molds. Molds are a major source of moldy odor and give users discomfort.

[0008]

SUMMARY OF THE INVENTION The present invention eliminates the odor adsorption and desorption of the adsorbed odor at high humidity, which are the fatal drawbacks of the above-mentioned zeolite and silica gel-based hygroscopic agents. Suppress the occurrence,
Moreover, it is an object of the present invention to provide a dehumidifying or total heat exchanging sheet and a dehumidifying or total heat exchanging sheet using a hygroscopic agent which has excellent hygroscopicity, is lightweight, has a small heat capacity, and has a small regeneration heat energy. It is.

An object of the present invention is to provide an organic polymer hygroscopic agent having silver, copper, zinc or the like having an acidic group and a counter cation fixed in the molecule according to the present invention and having a bactericidal effect on part or all of the counter cation. To provide a dehumidifying or total heat exchange sheet in which fine particles of the above are uniformly contained and fixed over the entire surface of the sheet, and a dehumidifying or total heat exchange element obtained by laminating the sheets so as to have a large number of small holes. Is achieved by
Fine particles of the organic polymer moisture absorbent may be mixed together with the paper stock to make a paper to prepare a sheet for dehumidification or total heat exchange.

[0010] Examples of the organic polymer hygroscopic agent that can be used as a raw material of the hygroscopic agent in the present invention include Diaion SK1B Na type of Mitsubishi Chemical Corporation, Dowex Ion HCR-S Na type of Dow Chemical Company, and Sumitomo Chemical. Resin such as Duolite C-20S Na type of Agarite and Amberlite 1R-120B Na type of Organo. An organic polymer hygroscopic agent containing a metal ion such as Ag, Cu, or Zn having a bactericidal effect can be produced by ion-exchanging any of the above resins.

Resin ion exchanger RSO ₃ Na + Ag ⁺ = RSO ₃ Ag + Na ⁺ 2R-SO ₃ Na + Cu 2 ⁺ = (R-SO ₃ ) ₂ Cu + 2Na ⁺ 2R-SO ₃ Na + Zn ²⁺ = higher _{(R-sO 3) 2 Zn} + 2Na + ion exchange valence of the ion, and because valence proceeds to the right in the above equation as ion atomic number is large if the same, the above Ag , Cu, Zn exchangers are stable and Ag, Cu, Zn are not easily eluted even when washed with water.

These ion exchanger resins are finely pulverized, and the results of an antibacterial test by the Japan Food Research Laboratories are shown in Table 1. After adding the bacterial solution of Aspergillus niger and blue mold to the liquid medium containing 10%, 1% and 0.1% of the specimen, respectively, the cells were shake-cultured to confirm the presence or absence of the growth of the bacteria.
Mitsubishi Chemical Diaion S
Using the K1B-Na form, SK1B-
Ag, SK1B-Cu, and SK1B-Zn were used.

[0013]

[Table 1] As shown in Table 1, the antimicrobial activity tends to be strongest for silver exchangers, followed by copper, and then weakest by zinc. This SK1B
-Na as an example, SK1B-N must be used to impart antifungal properties to the dehumidifying sheet and the dehumidifying element according to the present invention.
a If SK1B-Ag is contained in the moisture absorbent, a small amount
It can be seen that -Cu is more than that, and SK1B-Zn must be used a little more.

SK1B-Ag, SK1B-Cu, SK1
There is no significant difference in the moisture absorption performance between B-Zn and SK1B-Na. Therefore, even if the amount of these fungicides is increased, the moisture absorption performance is not reduced. The dehumidifying performance of a dehumidifying sheet and a dehumidifying element using an organic moisture absorbing agent such as SK1B-Na has already been described in JP-A-7-204451.

In order to produce the above-mentioned organic polymer hygroscopic agent provided with the antifungal property, 100%
An ion exchanger ion-exchanged with silver, copper, zinc, or the like may be mixed with a base organic polymer desiccant in an appropriate ratio, or a part of the base organic polymer desiccant may be mixed with silver, copper, or the like. Alternatively, ion exchange may be performed with zinc or the like.

A dispersion obtained by dispersing a fine powder of the organic polymer hygroscopic agent provided with the antifungal property in an appropriate binder liquid is impregnated and fixed on a porous sheet having inorganic fibers as a main component and having a low density to remove moisture. Obtain a sheet. Alternatively, a fine powder of the organic polymer adsorbent provided with the above-mentioned antifungal property is mixed into a stock as a hygroscopic agent, and the paper is made to obtain a dehumidifying sheet. Alternatively, the dehumidifying sheet may be further impregnated and fixed with the above-mentioned organic polymer hygroscopic agent having antifungal properties. Further, powders of these organic polymer moisture absorbents may be appropriately attached to a metal sheet via an adhesive.

The dehumidifying element can be obtained as a laminate in which these dehumidifying sheets are stacked in a honeycomb shape or with an appropriate gap. Alternatively, a laminated body is formed by stacking porous sheets or metal sheets having a small density mainly composed of inorganic fibers with a honeycomb shape or other appropriate gaps, and an appropriate amount of a fine powder of an organic moisture absorbent is added to an appropriate binder solution. Is impregnated or coated with an emulsion and dried to obtain a dehumidifying element in which the organic polymer desiccant powder is fixed on all sheets constituting the laminate. As for the fixing amount of the organic polymer desiccant powder, for example, when the laminate is made of an aluminum sheet having a thickness of 0.1 mm, if the weight is set to about 20% of the weight of the laminate, the moisture for the rotor for total heat exchange is reduced. The ability to move is fully demonstrated.

The strongly acidic cation exchange resin will be described in more detail as an example of the organic polymer hygroscopic agent having an acidic group and a counter cation fixed in the molecule used in the present invention. This is a synthetic resin in which styrene and divinylbenzene are three-dimensionally copolymerized and has a sodium sulfonate group (—SO ₃ Na) as an ionizing group chemically bonded to some places on the benzene ring as shown in Chemical Formula _1. .

[0019]

Embedded image Ionizing groups can be generally represented by ^{_{(R-SO 3) nM n}} + [M n + ... cation, n = 1,2,3 ...]. R-S
Since Na ^{+ in} O ₃ —Na ⁺ can be easily replaced by various metal cations, it is easy to produce a resin having a structure such as Chemical Formula ² in which Na is replaced by Ag. In addition, there is an (R-COO) nMn ⁺ type acidic ionizing group.

[0020]

Embedded image These ionizing groups are generally hydrophilic, and the presence of these groups imparts hygroscopicity to the resin. These three-dimensionally polymerized resins are porous and have the ability to adsorb and retain water. The hygroscopicity of this organic polymer hygroscopic agent can be variously controlled by changing the raw materials, polymerization conditions, the type of ionizing group and the ratio thereof at the stage of synthesis. The organic polymer desiccant has considerable physical strength, is insoluble in water despite its hydrophilicity, and has heat resistance of 60 to 150 ° C.

As the metal having antifungal and antibacterial properties, silver,
Nickel, mercury, or the like can be used in addition to copper and zinc.

(Example 1) Production method of organic polymer hygroscopic agent containing 100% silver: Strong acidic resin (gel type) manufactured by Mitsubishi Chemical Corporation
DIAION SK1B-Na type (particle size range 1180
300 μ) 1000 ml is dispersed in an appropriate amount of pure water, poured into a glass long column, and filled without bubbles. From above, about 11.6% of a 3% aqueous solution of silver nitrate
kg (small excess than equivalent) is gradually added to perform complete ion exchange. The exchanger is thoroughly washed with water and 100% by silver ion
Obtain the exchanged resin. This is finely ground if necessary.

(Example 2) Production method of organic polymer hygroscopic agent partially containing silver (1): Strong acidic resin (gel type) manufactured by Mitsubishi Chemical Corporation
DIAION SK1B-Na type (particle size range 1180
300 μ) 1000 ml was added to an aqueous solution obtained by dissolving 10 g of silver nitrate in 1 liter of pure water and stirred at room temperature for about 1 hour,
The Na is partially replaced with Ag. Filter off, wash with water,
Thereafter, the mixture is appropriately pulverized to obtain a fungicidal organic polymer hygroscopic powder (mol fraction of silver = 0.0294).

(Example 3) Production method of organic polymer hygroscopic agent partially containing silver (2): Strong acidic resin (gel type) manufactured by Mitsubishi Chemical Corporation
DIAION SK1B-Na type (particle size range 1180
300 μm) is mixed with 1000 ml (containing 2 mol Na) of the unmilled DIAION SK1B-Ag form prepared in Example 1 and pulverized to 10 μm or less. It contains silver in approximately the same proportions as the sample of Example 2 (silver mole fraction 0.0291).

Example 4 Strongly acidic resin manufactured by Mitsubishi Chemical Corporation
(Gel type) DIAION SK1B-Na type (particle size range 1
180-300 μ) as a raw material, and 100% ion exchange is performed in the same manner as in Example 1 using a copper sulfate solution.
A B-Cu form is obtained. SK1B-Na form 900ml SK
100 ml of 1B-Cu type is added, mixed and pulverized to obtain an organic polymer hygroscopic agent.

(Example 5) Strongly acidic resin manufactured by Mitsubishi Chemical Corporation
(Gel type) DIAION SK1B-Na type (particle size range 1
Using the zinc sulfate solution as a raw material, 100% ion exchange was performed in the same manner as in Example 1, and S
A K1B-Zn form is obtained. This is pulverized to obtain an organic polymer moisture absorbent.

[0027] (Example 6) of the ceramic honeycomb Formula: 70 parts by weight ceramic fibers, 10 parts by weight of the pulp, consists composition of 20 parts by weight of the organic and inorganic mixed binder thickness 0.22 mm, a basis weight of 80 g / m ² papermaking As shown in FIG. 2, the corrugated paper 1 and the flat paper 2 are adhered to each other using the obtained inorganic fiber paper to form a single-wave molded body having a wavelength of P3.4 mm and a wave height of H1.8 mm. As shown in FIG. 1, a honeycomb-shaped laminate in which the small through-holes 3 penetrate on both surfaces is obtained. The bulk specific gravity of the honeycomb laminate after drying is about 110 kg / m ³ .
Next, this honeycomb-shaped laminate was placed in a firing furnace, and an oxygen content of 1 was obtained.
It is baked for about 5 hours by hot air at a temperature of 600 ° C. at 0% or less. The bulk specific gravity of the fired honeycomb laminate is about 90 kg /
become m ^3.

As a hygroscopic agent, SK1B-A was added to Diaion SK1B-Na (100 volumes) manufactured by Mitsubishi Chemical as shown in Example 3.
g (1 volume) is mixed and dispersed in a suitable aqueous organic binder to obtain a honeycomb-shaped laminate 100.
The concentration of the hygroscopic agent in the dispersion is adjusted so that the amount of the hygroscopic agent is about 50 parts by weight with respect to parts by weight. The honeycomb laminate is immersed in the dispersion for several minutes and then dried with hot air at about 120 ° C. for about 2 hours to obtain a dehumidifying element.

(Example 7) As shown in FIG. 2, a corrugated sheet 1 was formed by using an aluminum sheet having a thickness of 0.01 to 0.3 mm.
And the flat sheet 2 are bonded to each other so that the wavelength P is 3.4 mm and the wave height H is
A single-wave molded body having a thickness of 1.8 mm is formed, and the single-wave molded body is laminated to obtain a cylindrical honeycomb laminated body having small through holes 3 penetrated on both sides as shown in FIG. This aluminum honeycomb-shaped laminate is immersed in a dispersion in which the organic polymer hygroscopic agent partially containing silver obtained in Example 2 is dispersed in an aqueous organic binder emulsion. After immersion for several minutes, it is dried with hot air of about 120 ° C. for about 2 hours to obtain a total heat exchange element.

Example 8 The aluminum honeycomb-shaped laminate shown in Example 7 was replaced with the zinc obtained in Example 5 by 1%.
It is immersed in an aqueous organic binder emulsion containing a 00% ion-exchanged organic polymer moisture absorbent. After immersion for several minutes, it is dried with hot air of about 120 ° C. for about 2 hours. If necessary, repeat immersion drying. The carrying amount of the moisture absorbent is adjusted to be about 15 g / m ³ with respect to the volume of the honeycomb. Thus, a total heat exchange element is obtained.

Example 9 The organic polymer hygroscopic agent partially containing silver obtained in Example 2 was fixed to the inorganic fiber paper used in Example 6 via an aqueous vinyl acetate emulsion binder, , And adjusted to 35-45 parts by weight of the hygroscopic agent with respect to 100 parts by weight of the carrier sheet to obtain a moisture absorbing sheet.

Example 10 The sheet obtained in Example 9 was immersed in a 20% strength aqueous solution of sodium chloride for several minutes, and then dried by ventilation at about 120 ° C. to obtain a sheet for absorbing moisture containing sodium chloride.

(Example 11) The sheet obtained in Example 9 was immersed in an aqueous solution of sucrose having an appropriate concentration for several minutes.
It is air-dried at 0 ° C., and the sucrose content is 7-8% of the weight of the sheet.
% To obtain a sucrose-containing sheet for moisture absorption.

(Comparative Example 1) A ceramic honeycomb laminate manufactured in the same manner as in Example 6 was subjected to JIS in which the concentration was adjusted.
After sufficiently immersing in No. 1 water glass, it is dried at about 50 ° C. for 30 minutes. Next, heat treatment is performed for 3 hours in a 23% aqueous solution of aluminum sulfate at about 50 ° C., and after washing with water, 150 ° C.
For 2 hours to obtain a laminated body (rotor) for aluminum silicate gel ceramic dehumidification (patent application publication August 1993)
1831) [SSCR-M].

(Comparative Example 2) Silica gel aluminum rotor for total heat exchange: An aluminum sheet having a thickness of 0.01 to 0.3 mm is passed through a polyvinyl acetate adhesive, excess adhesive is removed by a squeezing roller, and infrared drying is performed. After drying in an oven, the adhesive layer is 5 to 60 μm thick (solids weight ratio to sheet: 20
To about 40%), and a jet jet of silica A gel fine particles is applied to both sides of the sheet to deposit about 10 to 40 parts by weight of silica gel fine particles with respect to 100 parts by weight of the aluminum sheet. Apply a vinyl emulsion (solid content: 10-20%) and heat dry at 150 ° C for 10 minutes before the emulsion is hardened to create many fine pores in a thin vinyl acetate film to obtain a material for total heat exchanger . Using this material, a honeycomb-shaped laminated body, that is, a total heat exchange element is obtained in the same manner as in Example 7 (1995 Patent Application Publication No. 16576).

(Odor transfer test) A total heat exchange element according to claim 5 obtained by the method of Example 7 and a conventional silica gel-supported total heat exchange element shown in Comparative Example 2 were prepared.
Both are rotors of exactly the same size and shape. As shown in FIG. 3, outside air O at a temperature of 35 ° C. and a relative humidity (RH) of 50 to 80%
A and a return air RA having a temperature of 27 ° C. and a relative humidity (RH) of 50% were introduced into each rotor to perform total heat exchange. The temperature and humidity are summer conditions within the specifications of the Japan Refrigeration and Air Conditioning Industry Association (JRA).

In the seventh embodiment, the rotation speed of the rotor is 16 r.p.
For the control example, the rotational speed at which the highest performance was obtained at 20 rpm was adopted. It should be noted that such a difference in the number of revolutions has a negligible effect on the odor transfer rate. Outside air OA
And the return air RA into the rotor are both 2 m / sec., And the static pressure loss due to passage through the rotor is 9 mmAq.

Ideally, various odorous substances contained in the indoor air are discharged outside without being adsorbed and captured by the rotor. However, in practice, a part of the odorous substances is absorbed and captured and returns to the interior. It is desirable that this return phenomenon be as small as possible.

Isopropyl alcohol (IPA), toluene, and ammonia are mixed in the return air (RA) from the room, and these substances are supplied via the rotor to the supply air (SA).
As they migrated in and flowed indoors, their migration rates were measured. The relative humidity of the outside air (OA) was changed, and the change in the transfer rate due to the change in the outside air humidity was also measured.

A gas chromatograph GC-14A manufactured by Shimadzu Corporation was used to analyze the odor of IPA and toluene, and a Kitagawa gas detector was used to analyze the odor of ammonia. The results are shown in Tables 2, 3 and 4.

[0041]

[Table 2]

[Table 3]

[Table 4] As shown in Tables 2, 3, and 4, in all cases, the transfer rate of the odor component (the rate of recirculation indoors) was higher for the element for total heat exchange according to claim 5 of the present invention. It turns out that it is smaller than the element of Example 2. The transfer rate of odor components is IPA
In the case of ammonia, which is as low as about 9% and in toluene about 13%, which is very soluble in water, the element of the present invention is smaller than the element of the control example and the humidity is 70%. The device of the present invention accounts for 35.4% compared to 67.8% of the device of the control example.

Next, when the change in the transfer rate of the odorous substance due to the increase in the humidity in the outside air (OA) is observed, the transfer rate of the element of the control example clearly shows an increase, whereas the transfer rate of the control element of the present invention is clearly seen. In the device, there is almost no change in the transfer rate up to a humidity of 80%. That is, it is understood that the element of the present invention is hardly affected by the change in humidity.

Next, a mixed gas of ammonia, hydrogen sulfide, methyl mercaptan, and trimethylamine, which is called four major malodors, is adsorbed to the device of the present invention and the device of the comparative example, and the normal operation is performed until no odor is felt. Both rotors should still have accumulated odor components.

At this time, if the humidity during the supply increases suddenly,
The strongly adsorbed odor components must be released into the gas phase by displacing water molecules or dissolving into capillary condensate in the pores. To confirm this, an apparatus as shown in FIG. 4 was assembled, and the odor transfer was measured by the following test method. Table 5 shows the results.

Test method: 4 bad odors from RA for 60 minutes,
A certain amount flows in. At this time, the SA fan and rotor are stopped.

The rotor is rotated half a turn, and the other half is also made to emit four bad odors for 60 minutes.

Normal operation is performed without flowing odorous components.
(OA: 35 ° C / RH30%, RA: 27 ° C / RH30
%) Operate until no odor is sensed from SA • EA (exhaust).

When the odor is no longer felt, the rotor and S
Turn off the A / EA fan and set the OA to the air condition of 30 ° C. and 80% RH.

After the air condition was stabilized, the operation was resumed and the odor of SA was smelled with the nose, and the degree of odor was examined by five panelists (three males and two females) based on the six-stage odor intensity display method.

[0050]

[Table 5] As shown in Table 5, the device of the present invention hardly senses odor, but the device of Comparative Example senses some odor. FIG. 5 shows the performance of these two types as a total heat exchanger. In the figure, the horizontal axis is the wind speed [m / sec.] At the element entrance, and the vertical axis is the heat exchange efficiency [%].
And static pressure loss ΔP [mmAq].

The device of the comparative example is a conventional silica gel carrier, and the latent heat exchange efficiency of the organic moisture absorbent carrier of the present invention is higher than that of the device of the comparative example, and is about 12 at a wind speed of 2 m / sec. %high. This is because the device of the present invention has better hygroscopicity. The sensible heat exchange efficiency is slightly higher in the control device, but there is almost no difference. Therefore, the total heat exchange efficiency of the device of the present invention is better.

Next, with respect to the moisture absorbing sheets according to the third embodiment, ie, Examples 10 and 11, which further contain another electrolyte or a non-electrolyte, VOC (ethyl alcohol,
Methyl ethyl ketone and toluene). The test yielded results through the following procedure. The dried adsorption test sheet is weighed, placed in a desiccator, and evacuated. A certain amount of VOC is injected with a syringe, and then dry air is sent to return the pressure in the desiccator to normal pressure. About 24
After standing at room temperature for a period of time, the sheet for adsorption test is taken out and weighed quickly.

The concentration of the VOC in the desiccator before and after the adsorption test is checked by a gas chromatograph, and adjusted so that the VOC concentrations before the test become substantially constant. Saturation of the adsorption is confirmed by no decrease in the VOC concentration at the end of the test. Table 6 shows the test results. The adsorption ratio [%] indicates the ratio of the adsorption weight of VOC to the weight of the adsorption sheet, and the adsorption ratio [g / m ² ] indicates the ratio of the adsorption amount [g] of VOC to the unit area [m ² ] of one surface of the adsorption sheet. Show.

[0054]

[Table 6] (Comparative Example 3) The inorganic fiber paper shown in Example 6 was placed in a baking furnace and calcined with hot air at a temperature of 600 ° C for an oxygen content of 10% or less for about 5 hours. JIS1 which adjusted the density of this sheet
After fully immersing in water glass, it is dried at about 50 ° C. for 30 minutes. Next, heat treatment is performed for 3 hours in a 23% aqueous solution of aluminum sulfate at about 50 ° C., and after washing with water, 150 ° C.
For 2 hours to obtain a dehumidifying sheet in which aluminum sulfate gel is fixed to the fiber gap and the sheet surface.

The dehumidifying element as shown in Embodiment 6 and the total heat exchange element as shown in Embodiments 7 and 8 are, for example, a semiconductor factory, a film factory, a food factory, a building, and a building accommodating a large number of people. It is used for dehumidification drying and humidity control when the generation of odor is a problem especially in objects and other enclosed spaces.

For dehumidification, it has excellent dehumidification properties, and for total heat exchange, it has higher latent heat exchange efficiency than conventional products, recovers energy and contributes to humidity control. In addition to these effects, the dehumidifier and the total heat exchanger using the organic polymer desiccant according to the present invention prevent the generation of mold, which is a cause of mold odor, and adsorb various odors that enter the air,
It has a remarkable effect of suppressing divergence.

In a silica or zeolite dehumidifier and a total heat exchanger which are currently mainly used, when the humidity of the environment is high, particularly when the temperature is high, the device emits offensive odor, which is a major problem worldwide. I have. Therefore, a desiccant which adsorbs moisture but does not adsorb odor components as much as possible has been desired.

[0058]

The sheet and device for dehumidification or total heat exchange of the present invention use an organic polymer having an acidic group chemically bonded to a molecule and a counter metal cation as an adsorbent as described above. The mechanism is very different from that of silica gel and zeolite. As described above, silica gel and zeolite adsorb water well as well as odor components. Therefore, it causes odor in a high humidity environment.

The hygroscopicity of the organic polymer desiccant according to the present invention is caused by hydration and osmotic pressure of fixed ions and counter ions in the resin, and does not have an adsorption site for adsorbing odor molecules. Therefore, no odor molecules are adsorbed and accumulated. However, since the desiccant absorbs and retains a large amount of water, it is inevitable that a small amount of a water-soluble odor component is dissolved in the absorbed water. However, the hygroscopic agent itself is an organic substance, but it is a kind of salt.When this hygroscopic agent absorbs moisture, it contains cations in the adsorbed water, so unlike the phenomenon in which the odor component is dissolved in pure water, The solubility of the odor component in this adsorbed water is much smaller than in pure water.

A theoretical analysis has been made on the phenomenon that the solubility of a gas generally decreases when an electrolyte or a non-electrolyte is added to water (for example, edited by the Chemical Engineering Association, Revised 5th Edition Chemical Engineering Handbook, Maruzen Co., Ltd.). 62-63 (19
88)). This is as seen from the effects of the embodiments 9-11.

Since the organic polymer moisture absorbent according to the present invention is used to suppress the adsorption and release of odor as much as possible and to prevent generation of odor sources, the organic moisture absorbent of the present invention shown in Table 6 has the lowest possible VOC adsorption rate. Is desirable. First, it can be seen that the VOC adsorption rate of the sheet using the organic polymer absorbent according to the present invention is much lower than the VOC adsorption rate of the moisture absorbing sheet using silica gel used in the control example.

As shown in Examples 10 and 11, when the organic polymer moisture absorbent contains an electrolyte (NaCl) and a non-electrolyte (sucrose), the adsorption rate (solubility) of VOC is further reduced. I understand. When an electrolyte is contained, care must be taken since ion exchange may occur between metal ions contained in the electrolyte and metal ions contained in the organic polymer absorbent. Depending on the selection of these electrolytes and non-electrolytes, the adsorption of VOC can be reduced and the moisture absorption performance can be enhanced. Lithium chloride, sucrose and the like are examples.

Next, the dehumidifying performance of the honeycomb rotor for dehumidification according to the present invention and the conventionally used silica gel rotor was measured at the air velocity of 2 m / sec. At the entrance of the processing zone and at the entrance of the regeneration zone, and the cross-sectional area between the regeneration zone and the processing zone. Ratio 1
/ 3, temperature of processing air at rotor inlet 30 ° C, rotor diameter 320mm, rotor width 100mm, regeneration temperature 10
FIG. 6 shows the result of comparison under the condition of 0 ° C.

The SK1B rotor and the silica gel rotor according to the present invention have essentially no significant difference in dehumidification performance. The organic polymer desiccant according to the present invention has an excellent effect of having a high hygroscopicity equivalent to that of silica gel and a high effect of suppressing generation of mold and adsorption and release of odor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a honeycomb laminate.

FIG. 2 is a perspective view showing a part of a half-wave molded body.

FIG. 3 is a perspective view showing conditions of an odor transfer test of a total heat exchange rotor.

FIG. 4 is an explanatory perspective view showing an odor transfer test of the total heat exchange rotor.

FIG. 5 is a graph showing the performance of the present invention and a conventional total heat exchange rotor.

FIG. 6 is a graph showing the performance of the present invention and a conventional dehumidifying honeycomb rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated sheet 2 Flat sheet 3 Small through hole

Claims (8)

[Claims] 1. A dehumidifier for fixing an organic polymer hygroscopic agent having an acidic group chemically bound in a molecule and a counter cation, wherein a part or all of the counter cation is a metal ion having a bactericidal effect. Or a sheet for total heat exchange. 2. The method according to claim 1, wherein the metal ions are silver and / or copper and / or
The sheet for dehumidification or total heat exchange according to claim 1, which is a zinc ion. 3. The sheet for dehumidification or total heat exchange according to claim 1, wherein another electrolyte or a non-electrolyte is fixed together with the organic polymer hygroscopic agent. 4. Fine particles of an organic polymer hygroscopic agent having an acidic group chemically bonded in the molecule and a counter cation, and a part or all of the counter cation is a metal ion having a bactericidal effect. A sheet for dehumidification or total heat exchange made by mixing and making paper. 5. The honeycomb laminated body having a large number of small pores has, on the surface of the small pores, an acidic group chemically bonded to a molecule and a counter cation, and part or all of the counter cation is present. An element for dehumidification or total heat exchange in which an organic polymer hygroscopic agent, which is a metal ion having a bactericidal effect, appears. 6. The method according to claim 1, wherein the metal ions are silver and / or copper and / or
6. The element for dehumidification or total heat exchange according to claim 5, which is a zinc ion. 7. The element for dehumidification or total heat exchange according to claim 5, wherein another electrolyte or a non-electrolyte is present on the surface of the small through-hole together with the organic polymer hygroscopic agent. 8. An element for dehumidification or total heat exchange, wherein the sheet according to claim 4 is formed into a honeycomb laminate having a large number of small through holes.