JP2011143358A - Moisture absorption filter and humidifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To desorb water from a moisture absorption filter with warm air of 60°C or less and to supply the obtained humidified air into a room. <P>SOLUTION: A humidifier 10 includes in a casing thereof: the moisture absorption filter 16; a moisture absorption air passage 19 comprising an air sending/exhausting means 17 for passing room air 12 through the moisture absorption filter 16 and exhausting the air to the outside of the room; and a desorption air passage 22 comprising a heating means 11 and an air sending means 13 sending air to the moisture absorption filter 16 and sending air into the room. After adsorption of moisture into the moisture absorption filter 16 in the moisture adsorption air passage 19, the moisture absorption filter 16 slidingly moves to the desorption air passage 22, the air warmed in the heating means 11 passes through the moisture absorption filter 16 in which the moisture is desorbed, and the humidified air is supplied into the room. The moisture absorption filter 16 is formed into a ventilating honeycomb shape including a moisture absorbing material 24 in which calcium chloride 27 as a halide matter of an alkaline earth metals having deliquescence is attached to mesoporous silica 26 as a porous material. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a moisture absorption filter and a non-supply water humidifier equipped with the same.

  Conventionally, in the humidifier of non-water supply using this kind of moisture absorption filter, the thing of patent documents 1 is known, the moisture in the air is adsorbed with a moisture absorbent, and the moisture absorbent which adsorbed moisture is reproduced. 2. Description of the Related Art There is known an air conditioner that incorporates a humidifier that is heated by a heater and collects concentrated moisture and supplies it to the room. Hereinafter, the configuration of the humidifier will be described with reference to FIG.

  The humidifier includes a rotary moisture absorption filter 1 having a ventilation hole that adsorbs moisture in the air, a first blower 3 that blows indoor air 2 to the moisture absorption filter 1, and dry air that has passed through the moisture absorption filter 1. The outdoor air outlet 4 that discharges the air to the outside, the regeneration heater 5 that heats and regenerates the moisture absorption filter 1, and the ventilation air that blows indoor air 2 through both the regeneration heater 5 and the moisture absorption filter 1. It is used as a humidifier 8 composed of two blowers 6 and an indoor air outlet 7 for blowing air after humidification into the room.

  The indoor air is sucked in by the first blower 3. In the air passage of the first blower 3, the air blown as moisture-absorbed air, and moisture in the air is adsorbed by the moisture-absorbing filter 1. Also, the air that has been adsorbed with moisture and dried is discharged from the blower opening 4 to the outside of the room. The moisture absorption filter 1 moves by rotating by a rotating means 9 such as a gear motor, and eventually enters the air path of the second blower 6. In the air passage of the second blower 6, it is heated by the regeneration heater 5 upstream of the moisture absorption filter 1 in the humidification device 8 to become regeneration air, and the moisture adsorbed by the moisture absorption filter 1 by the regeneration air is desorbed and blown. The air is returned to the room through the mouth 7, and as a result, the humid air is sent into the room.

  When the outdoor humidity is low, the air supplied to the room is dried by natural ventilation, so that the moist air in the room escapes to the outside, the moisture in the room is reduced, and the room is dried. On the other hand, the presence of a humidifier removes moisture from the air exhausted from the room and returns the moisture to the room. Therefore, even if dry air is supplied by natural ventilation, the room has no humidifier. Difficult to dry or humidified.

  Moreover, in what was described in patent document 2, the ventilation to the moisture absorbent which was the said Unexamined-Japanese-Patent No. 10-47707 was performed with one fan, it was divided | segmented, one was made into moisture absorption air, and the other was carried out. A humidifier is shown that is passed through a regenerative heater and used as regenerated air.

Japanese Patent Laid-Open No. 10-47707 Japanese Patent Laid-Open No. 10-61977

  However, the conventional moisture absorption filter of the humidifying apparatus needs to desorb moisture by heating air to 80 ° C. or higher, preferably 100 ° C. or higher using a heater. For this reason, it is a matter of course that installation of a heater and a space around the heater are required, but there is also a problem that a large amount of electric power is required for regeneration by the heater. Moreover, since it desorbs by heating at a high temperature of 100 ° C. or higher, the resulting high-humidity air has a high temperature and must be supplied after being mixed with low-temperature air.

  Desorbing at a high temperature is a hygroscopic material used in conventional hygroscopic filters such as zeolite and silica gel, and 80 ° C or higher, preferably 100 ° C for regenerating so that moisture can be desorbed and absorbed again. This is because the above temperature is necessary, and it was a problem to obtain a low temperature regenerative type moisture absorbent capable of obtaining a difference in water content between adsorption and desorption even at low temperatures.

  The present invention solves the above-mentioned conventional problems, and moisture can be desorbed even when the air temperature for desorbing moisture of the moisture absorption filter is 60 ° C. or less, and 60 ° C. or less. An object of the present invention is to provide a non-water-supply type moisture absorption filter and a humidifying device that can be regenerated even with air.

In order to solve the above-described conventional problems, the present invention includes at least a porous body having a specific surface area of 300 m ² / g or more and a moisture-absorbing material in which an alkali metal or alkaline earth metal halide is mixed, and moisture in the air. And a humidifying device using the same.

  The moisture absorption filter according to the present invention and the humidifier without water supply equipped with the moisture absorption filter can obtain a difference in moisture amount between adsorption and desorption at a low temperature of 40 ° C. to 60 ° C., and the moisture absorption filter that absorbs moisture has a low temperature. Because water can be desorbed by a hot air source of, for example, 60 ° C. or less, heat sources such as energy efficient heat pump heating, exhaust heat of a fuel cell, exhaust heat of a gas turbine can be used. Therefore, energy saving performance can be improved as compared with a non-water-supply humidifying device regenerated by a heater. Moreover, since it desorbs at a low temperature of 60 ° C. or lower, the resulting air temperature is lowered, and it can be supplied as humidified air as it is outside the apparatus.

Schematic explanatory drawing of the humidifier in Embodiment 1 of the present invention (A) Schematic perspective view of corrugated honeycomb-shaped moisture absorption filter in Embodiment 1, (b) Schematic sectional view Schematic explanatory diagram of the hygroscopic material and the substrate in the first embodiment The flowchart which shows the manufacturing method of the moisture absorption filter in the same Embodiment 1. Explanatory drawing showing the concept of the thickness direction of the moisture absorption filter sheet in Embodiment 1 Explanatory drawing showing the concept of the ventilation direction of the moisture absorption filter in Embodiment 1 (A) Schematic explanatory drawing of the humidifier in Embodiment 5 of this invention, (b) Sectional drawing of the moisture absorption filter used for the humidifier Explanatory drawing which shows the relationship between the desorption temperature of the hygroscopic agent of Example 1 of this invention, and a moisture recovery rate. Schematic illustration of a conventional humidifier

The first invention includes, as the moisture absorbing material, a moisture absorbing material that is a mixture of a porous body having a specific surface area of 300 m ² / g or more and a halide of an alkali metal or an alkaline earth metal. Is a moisture absorption filter having a ventilation structure capable of adsorbing, and by adding a deliquescent material, which is a halide of alkali metal or alkaline earth metal such as calcium chloride, to the porous body, the alkali metal or alkaline earth The hygroscopic material absorbs moisture due to the liquefaction of metal halides, and even when the temperature is from 40 ° C. to 60 ° C., drying, that is, desorption of moisture occurs. it can. Further, when the alkali metal or alkaline earth metal halide absorbs moisture due to the deliquescence phenomenon, it liquefies, but the liquid is retained by the surface of the porous body. As a result, the mixture of the porous body and the alkali metal or alkaline earth metal halide is prevented from liquefying, and the halide deliquescent by desorption can be recrystallized and absorb moisture again. By repeating this, it is possible to perform dehumidification by continuously ventilating the moisture absorption filter, or conversely, moisture can be removed by desorption. From the above, in order to retain the deliquescent alkali metal or alkaline earth metal halide on the surface of the porous body, the specific surface area is desirably 300 m ² / g or more. Those having a hydrophilic group on the surface are desirable.

  According to a second aspect of the present invention, there is provided the moisture absorption filter, wherein the alkali metal or alkaline earth metal halide has a particle diameter smaller than that of the porous body. When the alkali metal or alkaline earth metal halide absorbs moisture due to the deliquescence phenomenon, it liquefies by deliquescence, but the liquid is retained by the surface of the porous body. The presence of alkali metal or alkaline earth metal halide particles on the surface of the porous body that are finer than the porous body reduces the possibility of the liquids aggregating when deliquescent, and the alkali metal or alkaline earth by drying again. The metal halide is crystallized and regenerated to absorb moisture.

  A third invention is a moisture absorption filter using a moisture absorbent, wherein the porous body of the invention is any one or a mixture of zeolite, mesoporous silica, mesoporous alumina, or activated carbon. These porous bodies have a large amount of moisture absorption when the relative humidity is high. Therefore, even when the deliquescent material is deliquescent by prolonged moisture absorption and liquefied, that is, when the relative humidity is 100% on a micro level, these debris has a high specific surface area. Retained on the surface. Occurrence of dripping due to liquefaction of the alkali metal or alkaline earth metal halide, and the deliquescence aggregated as droplets, dried and recrystallized to become larger crystals than before moisture absorption, It is possible to prevent the moisture absorption capacity and the moisture absorption speed from decreasing. Even if the moisture absorption liquefaction, by drying, it is crystallized finely and regenerated so that it can absorb moisture.

  A fourth invention is a moisture absorption filter in which the alkali metal or alkaline earth metal halide is mixed in a ratio of 1% to 40% by weight with respect to the weight of the porous body. The moisture absorption capacity of the moisture absorption filter can be increased by attaching a deliquescent material that is an alkali metal or alkaline earth metal halide such as calcium to the porous body. In particular, when it exceeds 40%, it has been found that when the halides are deliquescent, the deliquescent halides agglomerate to form a large lump. On the other hand, when a large amount of deliquescent substances are contained, Since corrosion occurs, it is necessary to apply the powder in a state of 40% or less of the weight of the porous body and a finer powder than the porous body. Conversely, in order to increase the moisture absorption capacity, it must be mixed at a ratio of at least 1% by weight.

  In the fifth invention, the ventilation structure is a corrugated honeycomb shape, the surface area per volume can be increased, and the moisture passing through the moisture absorption filter and the moisture absorbing material can be brought into contact with each other with high efficiency to absorb moisture. Note that the corrugated shape is obtained by alternately laminating flat sheets (liners) and corrugated sheets (corrugated). In the present invention, the length of the wave in the wavelength direction is “pitch”, The length in the height direction is called “height”.

A sixth aspect of the present invention is the corrugated honeycomb moisture absorption filter, wherein the corrugated honeycomb has a pitch of 2.0 mm to 2.8 mm and a height of 0.8 mm to 1.3 mm, Therefore, the larger the corrugate pitch and height, the lower the ventilation resistance per unit volume and the smaller the surface area in contact with the gas. In the present invention, when the corrugated honeycomb pitch is 2.0 mm or less and the height is 0.8 mm or less, the pressure loss is high and the efficiency does not increase. In addition, when the pitch is 2.8 mm or more and 1.3 mm or more, the water recovery efficiency is lowered. Therefore, the corrugated honeycomb has a pitch of 2.0 mm or more.
It is desirably 8 mm or less and a height of 0.8 mm or more and 1.3 mm or less.

  In a seventh aspect of the present invention, the corrugated honeycomb of the moisture absorption filter has a base material composed of at least ceramic fibers and / or glass fibers, the base material has a corrugated shape, and the ceramic fibers By adsorbing a hygroscopic material, which is a mixture of the porous body and the halide, on the surface and the glass fiber surface via an inorganic binder such as colloidal silica, the hygroscopic material can be present on the corrugated honeycomb surface, Efficient contact and adsorption with moisture in the air. In addition, it can be efficiently reproduced even in the reproduction with warm air. Further, even if the halide is deliquescent and liquefied, the ceramic fiber and the glass fiber are not denatured by the liquid and can maintain the strength of the corrugated honeycomb.

  The eighth invention is characterized in that, in the corrugated honeycomb sheet of the moisture absorption filter, the adhesion concentration of an alkali metal or alkaline earth metal halide is higher near the surface in the thickness direction of the sheet than at the core of the sheet. Yes. As moisture passes through the honeycomb, it contacts the surface of the sheet. For this reason, the moisture absorption efficiency is higher when more alkali metal or alkaline earth metal halide is present on the surface. Therefore, it is desirable that the adhesion concentration of the alkali metal or alkaline earth metal halide is higher near the surface in the thickness direction of the sheet than in the core of the sheet.

  The ninth invention is characterized in that the moisture absorption filter has a gradient in the concentration of alkali metal or alkaline earth metal halide upstream and downstream of the ventilation structure. At the time of moisture absorption, there is a lot of moisture in the upstream of the ventilation, and the moisture is adsorbed upstream in the downstream of the ventilation, so the air is dried and it becomes difficult to absorb moisture. Therefore, in order to improve the moisture absorption capacity downstream of the ventilation, a gradient is given to the mixed concentration of alkali metal or alkaline earth metal halide, and the mixed concentration of alkali metal or alkaline earth metal halide is reduced downstream of the ventilation. It is desirable to arrange the moisture absorption filter so as to be higher.

  Further, when moisture is desorbed from the hygroscopic filter, that is, when humidifying the passing air, the temperature of the desorbed air decreases as it goes downstream because water evaporates. Therefore, it is desirable that a large amount of moisture can be desorbed upstream of the desorption air. Therefore, a gradient is applied to the mixed concentration of alkali metal or alkaline earth metal halide in the hygroscopic filter so that the mixed concentration of alkali metal or alkaline earth metal halide increases upstream of the ventilating air. It is desirable to arrange the moisture absorption filter.

  A tenth aspect of the present invention is the moisture absorption filter, a blowing means for blowing air to the moisture absorption filter and absorbing moisture to the moisture absorption filter, and then discharging a part or all of the ventilation to a predetermined place; A hygroscopic air passage having a heating device capable of producing air of 60 ° C. or lower and air blowing means for ventilating the heating device and ventilating the hygroscopic agent, and venting the air to the hygroscopic filter; The humidifier is configured to move the hygroscopic filter through a desorption air passage through which the air that has passed through the heating device passes through the hygroscopic filter, and the hygroscopic filter that has absorbed moisture in the hygroscopic air passage includes the desorption air In the road, moisture is desorbed by heating, and humidified air can be supplied indoors.

  For example, when the humidity outside the hygroscopic chamber is low, the air supplied to the room is dried by natural ventilation, so that the moist air in the room escapes to the outside, the moisture in the room is reduced, and the room is dried. In the humidifying device of the present invention, a part of the natural ventilation amount is forcibly ventilated through the moisture absorption filter and then exhausted to the outside. Since the air exhausted from the room is dehydrated and the moisture is returned to the room, even if dry air is supplied by natural ventilation or the like, the room is less likely to be dried or humidified than when there is no humidifier. The

  In addition, as a heating apparatus which can make the said 40 degreeC or more and 60 degrees C or less air, the condenser of a heat pump heat exchanger, the exhaust heat recovery apparatus of a micro gas turbine, the exhaust heat recovery apparatus of a fuel cell, etc. are mentioned.

(Embodiment 1)
FIG. 1 is a diagram showing an outline of a humidifying device according to a first embodiment of the present invention.

  In FIG. 1, the humidifier 10 has a heating means 11 such as a heat pump heat exchanger that can produce hot air of 40 ° C. or higher, and the room air 12 is passed through the heating means 11 by a blower means 13 such as a fan, so It is supplied into the room through the mouth 14.

  In the humidifier 10 housing, there is a moisture absorption filter 16 having a corrugated honeycomb shape as a ventilation structure, to which a moisture absorption material 15 is attached, and the indoor air 12 is passed through the moisture absorption filter 16 and the air is exhausted outside the room. For example, an air exhaust unit 17 such as a fan and an exhaust air passage 18 are provided, and the indoor air 12 is supplied to the moisture absorption filter 16 to adsorb moisture. This air passage is the moisture absorption air passage 19.

  When all or part of the moisture absorption filter 16 is present on the moisture absorption air passage 19 and the air blowing / exhausting means 17 is operating, the sucked air is absorbed, and the dried air is moved outside from the exhaust air passage 18 to the outside. Exhausted.

  The moisture absorption filter 16 has a drive path 20, and slides on each drive path using drive means 21 such as a gear motor. The moisture absorption filter 16 that has absorbed moisture in the moisture absorption air passage 19 moves along the drive route 20 and moves to the indoor air blowing port 14. At that time, warm air passes through the moisture absorption filter 16 by the air blowing means 13, whereby moisture is desorbed from the moisture absorption filter 16, and moisture can be supplied into the room together with the warm air. The air path for desorbing moisture at this time is the desorption air path 22.

  When the outdoor humidity is low, the air supplied to the room is dried by natural ventilation, so that the moist air in the room escapes to the outside, the moisture in the room is reduced, and the room is dried. On the other hand, the presence of a humidifier removes moisture from the air exhausted from the room and returns the moisture to the room. Therefore, even if dry air is supplied by natural ventilation, the room has no humidifier. Difficult to dry or humidified.

  It should be noted that using a heat pump heat exchanger as the heating means 11 is preferable because only low-temperature air can be obtained as compared to using a heater such as a nichrome wire, but the energy efficiency is high and the humidifier 10 can save energy.

  Note that the air supplied to the humidifying device 10 does not necessarily have to be the indoor air 12, and a part or all of the air may be supplied from the outside.

  FIG. 2A shows a moisture absorption filter 16 having a corrugated honeycomb structure. FIG. 2 (b) shows a corrugated honeycomb structure of a moisture absorption filter from the front of ventilation, where the corrugated wave length of the corrugated wave length is indicated by pitch 23 and the wave height is indicated by height 24. FIG. In order to increase the moisture recovery efficiency of the moisture absorption filter, the pitch 23 is desirably 2.0 mm or more and 2.8 mm or less, and the cell height 24 is desirably 0.8 mm or more and 1.3 mm or less.

FIG. 3 schematically shows the hygroscopic material 15 and the base material included in the corrugated honeycomb-shaped hygroscopic filter 16. The moisture-absorbing material 15 is obtained by adding calcium chloride 26 as a halide of an alkaline earth metal having deliquescence on a mesoporous silica 25 as a porous material.

As mesoporous silica 25 absorbs moisture material having deliquescent, deliquescent and, even if liquefied, by the liquid is absorbed in the surface area, since no liquid dripping from the hygroscopic agent, 300 meters 2 / ^g or more It is desirable to use a powder having a specific surface area.

  Further, it is desirable that calcium chloride 26 is attached at a ratio of 1% to 40% by weight of mesoporous silica 25 with respect to the weight of mesoporous silica 25. When it is added to 40% or more, when calcium chloride 26 is deliquescent and liquefied by long-term moisture absorption, it agglomerates on mesoporous silica 25 to cause dripping and corrode parts such as external metals. In addition, when aggregated and dried again to form calcium chloride 26 crystals, the crystals become larger than before aggregation, so that the amount of moisture absorption and the rate of moisture absorption decrease, and the amount of moisture humidified indoors decreases. Further, when the amount of attachment is less than 1% by weight, there is no difference in the amount of moisture absorption and the rate of moisture absorption of the moisture absorbent material 15 as compared with the case where the calcium chloride 26 is not used.

  Further, as the base material of the corrugated honeycomb, one composed of ceramic fibers 27 and / or glass fibers 28 is desirable. Moisture absorption that is a mixture of the mesoporous silica 25 and the calcium chloride 26 through colloidal silica made of sodium silicate or the like as an inorganic binder on the surface of the ceramic fiber 27 and the glass fiber 28 on the surface of the substrate. By adhering the material 15, the hygroscopic material 15 can be present on the surface of the corrugated honeycomb, and can efficiently contact and adsorb moisture in the air. In addition, it can be efficiently reproduced even in the reproduction with warm air. Even if the calcium chloride 26 is deliquescent and liquefied, the ceramic fibers 27 and the glass fibers 28 are not denatured by the liquid, and the strength of the corrugated honeycomb can be maintained.

  FIG. 4 is a flowchart showing an example of a method for manufacturing the moisture absorption filter 16.

  The manufacturing method will be described below according to the flowchart.

  A dispersion of mesoporous silica 25 as a porous body and colloidal silica as an inorganic binder is impregnated with a ceramic honeycomb processed into a corrugated honeycomb shape with a base sheet containing at least ceramic fibers 27 and / or glass fibers 28, and an excess liquid is impregnated. After blowing off, it is dried at a temperature of 100 ° C. or higher to produce a mesoporous silica honeycomb.

  The dried mesoporous silica honeycomb is impregnated with an aqueous calcium chloride solution, and excess liquid is blown off, followed by drying at 100 ° C. or higher to complete the hygroscopic agent of the mesoporous silica-calcium chloride honeycomb. At this time, by adjusting the solid fraction of the mesoporous silica 25 dispersion and the calcium chloride concentration of the calcium chloride 26 aqueous solution, the density of attachment to the ceramic honeycomb can be changed.

  Further, as shown in FIG. 5, more calcium chloride 26 is present on the surface 31 in the thickness direction of the sheet 30 of the corrugated honeycomb shaped moisture absorption filter 16 than the core portion 32 in the thickness direction of the sheet. It is desirable to create 26 concentration gradients in the thickness direction of the sheet 30.

This is because moisture is in contact with the surface of the sheet 30 when passing through the honeycomb, so that the moisture absorption efficiency is greater when calcium chloride 26 as a halide of alkali metal or alkaline earth metal is present on the surface. This is because of the increase. For that purpose, hot air of 100 ° C. or higher, preferably 150 ° C. or higher is applied to the honeycomb body by utilizing the fact that the calcium chloride 26 migrates and moves after impregnation with the calcium chloride 26 aqueous solution at the time of manufacturing the hygroscopic filter 16. It is desirable to dry.

  Further, as shown in FIG. 6, it is desirable to provide a concentration gradient of calcium chloride 26 attachment at the ventilation upstream 34 and the ventilation downstream 35 of the ventilation structure in the ventilation direction 33 of the corrugated honeycomb shaped moisture absorption filter 16.

  This is because a humidity gradient can be formed between the upstream and downstream of the ventilation hole of the honeycomb vent during moisture absorption and desorption, and the amount of calcium chloride 26, which is a hygroscopic agent, can be efficiently absorbed. It is desirable that there is a gradient. In order to create a concentration gradient of the calcium chloride 26, after impregnating the calcium chloride aqueous solution at the time of manufacturing the hygroscopic filter 16, the honeycomb body is placed on a wire mesh or the like with the ventilation direction of the honeycomb body vertical, preferably 100 ° C. or higher from above, preferably Drying by applying hot air of 150 ° C. or higher is desirable in order to have a gradient of the calcium chloride 26 adhesion concentration.

  In addition, it is desirable that the concentration of calcium chloride is low upstream of the hygroscopic air. When the hygroscopic air is high humidity, the upstream calcium chloride is liable to be liquefied by the deliquescence phenomenon. Therefore, in order to prevent liquefaction, it is preferable to arrange the moisture absorption filter in the apparatus so that the calcium chloride adhesion concentration increases from the upstream side toward the downstream side.

  However, if there is no fear of liquefaction due to deliquescence due to aeration conditions or the amount of calcium chloride attached, and the capacity as a humidifier increases, the concentration of calcium chloride attached decreases from the upstream side to the downstream side. Also good.

(Embodiment 2)
In the first embodiment, the hygroscopic material 15 on which the mesoporous silica 25 and the calcium chloride 26 are attached is used as the hygroscopic material 15 on the hygroscopic filter 16, but the hygroscopic material 15 is used for a sheet of nonwoven fabric or paper. Or corrugated with a hygroscopic sheet obtained in this way into a corrugated shape and a flat liner. Alternatively, a corrugated honeycomb may be laminated to form a moisture absorption filter.

(Embodiment 3)
In the first embodiment, the hygroscopic material 15 is obtained by adding calcium chloride 27 as a deliquescent alkaline earth metal halide on the mesoporous silica 26 as the porous material shown in FIG. Instead of mesoporous silica, it may be a porous adsorbing material such as zeolite, silica gel, mesoporous alumina, activated carbon or the like, and the hygroscopic material 15 does not liquefy when alkali metal or alkaline earth metal halide is liquefied. It is sufficient that the deliquescent halide is held on the surface of the porous body. Further, a mixture of a plurality of the aforementioned porous adsorbent materials may be used.

(Embodiment 4)
In Embodiment 1, calcium chloride 26 is impregnated as the alkaline earth metal halide having deliquescence on the mesoporous silica 25 as the porous material shown in FIG. 3 as the hygroscopic material 15. It may be a halide of an alkali metal or alkaline earth metal as a material having, and more preferably at least one metal chloride or bromide composed of calcium, lithium and magnesium. Specifically, in addition to calcium chloride, Examples thereof include lithium chloride, magnesium chloride, calcium bromide, lithium bromide, magnesium bromide, and hydrates thereof.

  Here, calcium chloride, lithium chloride, and lithium bromide are preferable from the viewpoint of obtaining the effect of the present invention more reliably, and lithium bromide is particularly preferable from the viewpoint of low corrosivity.

(Embodiment 5)
In the first embodiment, the hygroscopic filter 16 is alternately replaced with the hygroscopic air passage 19 and the desorption air passage 22 so as to adsorb the moisture in the room and exhaust the dried air. The moisture is released into the room, and this may be a rotor-shaped rotor-type moisture absorption filter 36 as shown in FIG.

  Using the rotating means 37 such as a gear motor, the rotor type moisture absorption filter 36 can be rotated and alternately replaced with the moisture absorption air path 19 and the desorption air path 22. Therefore, the drive path 20 shown in the first embodiment is not necessary, the number of parts can be reduced, and the manufacturing can be performed at low cost. FIG. 7B shows a cross-sectional view of the rotor type moisture absorption filter 36 portion.

(Embodiment 6)
In Embodiment 1, although the heat exchanger of the heat pump condenser was used as a heating means, the heating means by the heat exchanger using the exhaust heat emitted from a micro gas turbine, or the heat using the heat emitted from the fuel cell Heating means using an exchanger may be used. In addition, although heating means, such as a nichrome wire and a PTC heater whose temperature can be adjusted to 40 ° C. to 60 ° C., may be used, it is desirable to use the heating means because it is excellent in energy saving.

(Embodiment 7)
In the first embodiment, a corrugated honeycomb filter is shown as the moisture absorption filter 16. However, any filter having a ventilation structure may be used, and a foam such as urethane foam may be used as the shape, and an adhesive may be applied to the urethane foam. Alternatively, the moisture absorbing material 15 may be attached thereto.

(Example)
A 70 mm square, 10 mm thick ceramic honeycomb is impregnated with a dispersion of mesoporous silica and colloidal silica, and the excess liquid is blown off and dried at 180 ° C. to prepare a mesoporous silica honeycomb. The ceramic honeycomb is obtained by processing glass fibers or ceramic fibers into a corrugated honeycomb shape. As shown in FIG. 2B of the first embodiment, the ceramic honeycomb cell is expressed by the pitch 23 and the height 24. Three types of honeycomb cells shown in Table 1 were prepared and evaluated.

  The dried mesoporous silica honeycomb is impregnated with an aqueous calcium chloride solution, and the excess liquid is blown off, followed by drying at 180 ° C. to complete the hygroscopic agent of the mesoporous silica-calcium chloride honeycomb. At this time, by adjusting the solid content ratio of the mesoporous silica dispersion and the calcium chloride concentration of the calcium chloride aqueous solution, the amount of attachment was changed as shown in Table 1.

  This amount of impregnation was calculated from the weight measurement before and after impregnating each dispersion and aqueous solution and drying.

  The sample thus obtained was evaluated by the following experimental method. The experimental method will be described below.

(1) First, air is heated by a heater in a room at 20 ° C. and 40%, and air heated to 40 ° C., 45 ° C., or 50 ° C. is supplied into the duct A. In addition, the temperature of 40 degreeC to 50 degreeC is a temperature which can be produced by the exhaust heat of a heat pump heat exchanger, a micro gas turbine, or a fuel cell.

  (2) A sample of the hygroscopic agent is placed in the duct A and dried until the weight is stabilized.

  (3) Thereafter, the dried sample is taken out, and the test air is passed through another duct B for 120 seconds with the passing air volume adjusted so that the surface air velocity is 0.112 m / second, thereby absorbing moisture. Let The weight change of the hygroscopic agent before and after moisture absorption at this time is defined as a moisture absorption amount.

  (4) On the other hand, the total moisture content contained in the air, that is, the total moisture content that has passed through the sample is calculated from the absolute humidity of air at 20 ° C. and 40%.

(5) Divide the amount of moisture absorbed by the hygroscopic agent of (3) by the total amount of moisture passed through (4), and evaluate the moisture recovery rate in the room.
(Comparative Example 1)
As Comparative Example 1, a hygroscopic polymer honeycomb obtained by corrugating a sheet to which a high molecular hygroscopic polymer was attached was prepared and evaluated in the same manner as in the example.
(Comparative Example 2)
As Comparative Example 2, a zeolite honeycomb was prepared by impregnating the ceramic honeycomb of the example with zeolite, and a similar experiment was conducted without adding a deliquescent material such as calcium chloride.

  The prepared sample and the evaluation result of the sample are shown in Table 1, and a graph of the moisture recovery rate is shown in FIG. Although it was confirmed that moisture could be recovered in both Example and Comparative Examples 1 and 2, the mesoporous silica-calcium chloride honeycomb of Example could achieve a higher water recovery rate than Comparative Examples 1 and 2. It was.

That is, the adhesion density of mesoporous silica as a porous material is 0.039 g / cm ³ or more and 0.084 g / cm ³ or less, and the adhesion density of calcium chloride as a deliquescent halide is 0.012 g / cm ³ or more. It was found that 0.027 g / cm ³ or less was good, and it was confirmed that the ratio of mesoporous silica and calcium chloride may be 23% or more and 37% or less.

  The cell pitch may be 2.0 mm or more and 2.8 mm or less, and the cell height may be 0.8 mm or more and 1.3 mm or less. In particular, the cell pitch is 2.5 mm and the cell height is 1.1 mm. It was found that the water recovery rate was high. In particular, the tendency appears remarkably when the desorption air temperature rises.

  Further, the higher the temperature of the desorption air, the higher the water recovery rate, and it was confirmed that the recovery rate was improved by about 1.5% for every 1 ° C increase between 40 ° C and 50 ° C. Thus, it is possible to control the water supply amount by controlling the heat supply from a heating device such as a heat pump.

  As described above, according to the present invention, moisture can be desorbed at a relatively low temperature, so that energy-saving humidification is possible. For example, the air is humidified indoors by using a heat source for supplying hot air when supplying hot air. It is possible to supply air and improve the comfort level of the room by adjusting the humidity, and it is possible to suppress the deterioration of the house due to drying and the propagation of viruses in the air. In particular, when it is desired to maintain a low temperature, the humidification method of the present invention that can be humidified at low temperature and without water supply is excellent, and it is possible to maintain humidity in a refrigerator, a drying cabinet, a selective dryer, a wine cellar, and the like.

DESCRIPTION OF SYMBOLS 1 Hygroscopic filter 2 Indoor air 3 1st air blower 4 Outdoor air outlet 5 Regeneration heater 6 2nd air blower 7 Indoor air outlet 8 Humidifier 9 Rotating means 10 Humidifier 11 Heating means 12 Indoor air 13 Air blower 14 Indoor air vent 15 Moisture absorption Material 16 Moisture absorption filter 17 Ventilation exhaust means 18 Exhaust air path 19 Absorption air path 20 Drive path 21 Drive means 22 Desorption air path 23 Pitch 24 Height 25 Mesoporous silica 26 Calcium chloride 27 Ceramic fiber 28 Glass fiber 29 Flowchart 30 Sheet 31 Thickness Directional surface 32 Thickness direction core 33 Ventilation direction 34 Ventilation upstream 35 Ventilation downstream 36 Rotor type moisture absorption filter 37 Rotating means

Claims (10)

Ventilation structure capable of adsorbing moisture in the air, comprising a porous material having a specific surface area of 300 m ² / g or more as a hygroscopic material and a hygroscopic material which is a mixture of an alkali metal or alkaline earth metal halide. A moisture absorption filter characterized by having a body. The moisture absorption filter according to claim 1, wherein particles of the alkali metal or alkaline earth metal halide are smaller than a particle diameter of the porous body. 3. The moisture absorption filter according to claim 1, wherein the porous body is one or a mixture of zeolite, mesoporous silica, mesoporous alumina, or activated carbon. The alkali metal or alkaline earth metal halide is mixed at a ratio of 1% to 40% by weight with respect to the weight of the porous body. Hygroscopic filter. The moisture absorption filter according to any one of claims 1 to 4, wherein the ventilation structure has a corrugated honeycomb shape. 6. The moisture absorption filter according to claim 5, wherein the corrugated honeycomb has a pitch of 2.0 mm to 2.8 mm and a height of 0.8 mm to 1.3 mm. The moisture absorption filter according to claim 5 or 6, wherein the substrate of the corrugated honeycomb is composed of at least ceramic fibers or glass fibers or both. 8. The adhesion concentration of an alkali metal or alkaline earth metal halide is higher in a portion closer to the surface in the thickness direction of the sheet than in a core portion of the sheet. Moisture absorption filter. The moisture absorption filter according to any one of claims 1 to 8, wherein there is a gradient in the concentration of alkali metal or alkaline earth metal halide upstream and downstream of the ventilation structure. The moisture absorption filter according to any one of claims 1 to 9, and an air blowing unit that blows air to the moisture absorption filter and absorbs moisture to the moisture absorption filter, and then discharges part or all of the ventilation to a predetermined place. And a heating device capable of producing air of 40 ° C. or more and 60 ° C. or less, and a blowing means for ventilating the heating device and ventilating the hygroscopic agent, and venting the air to the hygroscopic filter. A humidifier configured to move the moisture absorption filter through a moisture absorption air passage and a desorption air passage through which air that has passed through the heating device passes through the moisture absorption filter.