JP4804581B1 - humidifier - Google Patents

Abstract

The present invention provides a humidifier capable of securing an arbitrary amount of water vapor generation without imparting an excessive heat amount of dielectric heating to the transpiration of water.
A humidifier according to the present invention includes a lower portion including small pore graphite having fine pores capable of supplying moisture by capillary action, and a capillary phenomenon including large particle size graphite. A humidifying element made of a molded product of a carbon aggregate having hydrophilicity inside the pores, the boundary surface of which is formed by forming conical irregularities on the upper surface having large pores that do not depend on the bottom, In an aquarium having a dielectric coil on the outer surface, the upper part is held in a state where it is not immersed in water, and steam is dissipated by performing electromagnetic induction heating.
[Selection] Figure 2

Description

  The present invention relates to a humidifier including a humidifying element that generates heat by electromagnetic induction heating.

  The humidifier used for humidification in the living environment uses a humidifying element in which hydrophilic thin plates are cascaded to increase the surface area, and a desired humidifying capacity is achieved using an element that improves the evaporation efficiency of moisture retained on the surface of the thin plate. In addition to ensuring the above, there is one provided with a mechanism for heating this to promote vaporization of moisture. These humidifying elements promote water retention due to their high hydrophilicity, and have a fine pore in the base material in order to promote moisture diffusion, and ensure a moisture diffusing function by capillary action.

  For example, the vaporization filter of the humidifier supports the sintered particles on the surface of the filter substrate to form voids, or the voids are formed in the filter itself such as a sintered ceramic porous body. The thing which apply | coated the hydrophilic substance to is proposed (for example, refer patent document 1).

  In addition, an inorganic porous material obtained by impregnating alumina paper with alumina sol and then molding and sintering is used as a humidifying element (see, for example, Patent Document 2).

  The humidifying element used in these humidifiers is a part of the rotating disk that is submerged and vaporizes the thin film of water retained on the surface, while the moisture retained by the porous body is dissipated. I do.

  However, in the method of vaporizing moisture in a state where moisture is retained on the surface of the humidifying element in order to achieve improvement in humidification efficiency, the efficiency is lowered due to a decrease in water temperature due to heat of vaporization. In order to suppress this, there has been proposed one in which an electromagnetic induction coil is arranged and heated at a position close to a humidifying filter unit made of a water-absorbing fiber material and a magnetic material (see, for example, Patent Document 3).

  However, since the electromagnetic induction coil is disposed on the outer peripheral surface of the humidifying filter, the heating surface has to be made small, and the electromagnetic induction coil is held in a high humidity atmosphere, so it is difficult to ensure safety reliability. Had been forced to structure. On the other hand, a fuel cell which humidifies with water held inside the porous body by forming a water channel on one side of the porous metal body and storing water therein, and allowing air to pass through the opposite surface using the porous body as an air path A gas humidifier has been proposed (see, for example, Patent Document 4).

  In addition, an inorganic fiber layer is provided on the upper portion, and a water receiver is provided so that the sintered SiC porous body, which is a porous plate having a three-dimensional network structure in contact with it, is under the water surface, and the sintered SiC porous body is overheated. A humidifying element of an air humidifier having a mechanism for humidifying when air penetrates in a state has been proposed (see, for example, Patent Document 5).

  Also, in place of the porous plate-like body described above, an air humidifier is proposed in which a hollow fiber body that can be heated by wrapping a heating wire around the outer peripheral surface is provided and humidified by air diffusing from the inside of the hollow fiber (For example, see Patent Document 6).

JP 2007-198685 A Japanese Patent Application Laid-Open No. 08-021644 JP 2007-085692 A JP 2005-032473 A Japanese Utility Model Publication No. 05-094634 Japanese Patent Application Laid-Open No. 06-011160

  However, when humidification is performed, it is necessary to heat the water that is held to supply water to the humidifying element and is not subjected to evaporation. Adjustment and holding become difficult. On the other hand, an excessively small amount of water supply causes a shortage of water supply due to the rapid vaporization and evaporation of the water held in the humidifying element, and increases the concentration of chlorides such as calcium and magnesium dissolved in the water, making it porous as a scale. Since it remains in the body, the moisture retention of the humidifying element decreases and the humidifying performance deteriorates.

  Further, when the amount of water supply is excessive, an excessive amount of water is retained in the pores of the porous material and overflows from the pores of the humidifying element and stays on the surface, so that the evaporation area is significantly reduced. As a result, the heating efficiency required for moisture vaporization is deteriorated and the humidification performance is lowered.

  In addition, in cases where moisture is insufficiently released and forced to be used repeatedly, the invading bacteria will promote the growth associated with warming of the water, and the hyphae when the water supply to the substrate is stopped or during the drying process There was a possibility of incurring splashes.

  The present invention has been made to solve the above-described problems, and provides a humidifier capable of securing an arbitrary amount of water vapor generation without imparting an excessive amount of dielectric heating to the transpiration of water.

  The humidifier according to the present invention includes a lower part including small pore graphite having fine pores capable of supplying water by capillary action, and a large graphite particle having a large particle diameter not depending on capillary action. A humidifying element comprising a carbon aggregate molded product having a hydrophilicity inside the pores, wherein the boundary surface between the lower portion and the upper portion is formed by forming conical irregularities. Is held in a water tank in which a dielectric coil is disposed on the outer surface of the bottom part in a state where the upper part is not immersed in water, and steam is dissipated by performing electromagnetic induction heating.

  In the humidifier according to the present invention, since the small pores at the lower position where the humidifying element is submerged efficiently supplies water by capillary action up to the upper position, it is optional without giving excessive heat of dielectric heating to the transpiration of water. The amount of water vapor generated can be secured.

FIG. 5 is a diagram showing the first embodiment, and is a schematic partial cross-sectional view showing an aspect of pores provided in the carbon aggregate of the humidifying element. FIG. 5 shows the first embodiment, and is a schematic cross-sectional view showing an arrangement state of humidifying elements in the water tank. The figure which shows Embodiment 1, and is a figure which shows the result of having evaluated the emitted amount of water vapor | steam by the weight reduction | decrease of water in 15 minutes after 5 minutes after a heating start.

Embodiment 1 FIG.
The present embodiment relates to a humidifier using a porous plate (humidifying element) having a function of impregnating and retaining moisture as a carbon aggregate molded article capable of dielectric heating.

  Porous molded products that can be heated by dielectric heating have a molding material that is complexed with a small particle size graphite and a phenol resin that is a thermosetting resin containing carbon at a high concentration. This is a condensate obtained by firing a molded product obtained by heating / pressurizing such as compression molding in an oxygen-free high-temperature atmosphere by placing a molding material combined with the resin in the upper position.

  At the lower position, the porous molded product is submerged to obtain a capillary action and absorbs water, and at the upper position, the water vapor is smoothly diffused.

  A composite porous molded article obtained by curing a phenolic resin, which is a thermosetting resin phenol resin containing a large amount of graphite particles and carbon, by curing the phenol resin by heating at a low pressure load in a mold having an arbitrary shape, A carbon aggregate is obtained by firing treatment in a high temperature oxygen-free atmosphere. The pore content and size of the aggregate are determined by the size of the graphite particles and the mixing ratio of the phenol resin, and select the appropriate pore size related to the penetration and retention of moisture and the ease of water vapor scattering. .

  In particular, the present embodiment imparts novelty to the shape of the interface where both graphites are arranged, and only the moisture held inside the pores held is heated, and the inside of the molded product that promotes efficient diffusion is promoted. Characteristic in structure.

  In addition, organic fibers that have an arbitrary thickness and do not cause carbonization under the conditions of the firing process are likely to disperse and disappear, such as natural fibers such as pulp and synthetic fibers such as acrylic. In addition, pores communicating as traces after the firing treatment can be easily generated.

  In addition, antibacterial effects can be obtained by using carbon aggregates obtained by firing a molding material obtained by pulverizing shells such as scallops and sea shells using a mixture of graphite particles and phenol resin as a molding material at 800 ° C. Can be provided.

  Carbon aggregates with the above properties are dried or heat-treated after impregnation by dipping in a chemical solution, such as forming a thin film with a surfactant or hydrolyzing a silane coupling agent such as silazane to form a siloxane. A mode in which a hydrophilic thin film is formed in the pores by, for example, performing an impregnation with water is provided. The humidifier has a structure in which a coil is disposed in the vicinity of the porous carbon aggregate to enable dielectric heating, and self-heats to release moisture held in the pores of the aggregate as vapor. At this time, the humidifying element is disposed in the water tank, and the lower part thereof is submerged and impregnated with moisture in the pores, and then electromagnetic induction heating can be performed by the dielectric coil provided at the bottom of the water tank. It is desirable that moisture impregnation is performed smoothly in order to provide a humidification function of the atmosphere by vaporization.

  The humidifying element used in the present embodiment is provided with a micropore and a lower position where water is supplied by a capillary tube, and water held inside efficiently dissipates water vapor due to dielectric heat generation, and is accompanied by a capillary phenomenon that forms the upper position. No large pores achieve efficient diffusion of water vapor and release to the outside air. The present invention uses a humidifying element having these pores and having different condensate interfaces formed into a shape such that a plurality of cones are arranged.

  In addition, by passing dry air in the atmosphere on the upper surface of the humidifying element and depressurizing the pores by the venturi effect, it is possible to smoothly discharge water vapor and supply moisture from the lower position of the humidifying element. .

  Specifically, an eddy current generated by an induction heating coil, which is a high-frequency magnetic field generator, is configured so that the carbon aggregate is heated, and efficient water supply by capillary action of fine pores provided at the lower position of the aggregate is provided. A humidifying element having a mechanism for reheating water vapor in a relatively large gap at the upper position and a humidifier to which the humidifying element is applied.

  The base material of the humidifying element is a carbon aggregate obtained by firing a molding material obtained by heating and pressurizing a molding material in which a phenol resin is applied on the surface of graphite powder in a mold in an oxygen-free atmosphere. A small graphite powder with a wide particle size distribution is arranged at the position to supply water by capillary action, and a large graphite powder with a narrow particle size distribution is arranged at the upper position to facilitate the diffusion of water vapor. Is.

  In order to improve the transpiration efficiency related to the heating of the moisture held in the fine pores by supplying water from the lower part of the submerged humidifying element, the temperature increase due to the dielectric heating is caused from the bottom. By providing a difference in the amount of water vapor generated by changing the amount of heat generated according to the distance, a condensate with fine pores was formed in a cone shape so as not to fall short of water supply.

  That is, water supply tends to be insufficient due to intense vaporization in the vicinity of the bottom of the cone, but the vaporization is slow and water is easily retained at the top because the temperature is low. In a state where water supply is insufficient, the amount of heat transfer to the top increases and the temperature rises, so that it is possible to avoid a rapid decrease in the amount of water vapor generated. In addition, in order to facilitate the diffusion of water vapor, the aggregate provided with pores of different sizes arranges cone-shaped irregularities and is complexed to increase the area for vaporization.

  In addition, a lower carbon content fiber material that has an arbitrary thickness and decomposes and scatters at a temperature lower than the decomposition temperature of the phenolic resin, for example, natural fibers such as pulp or synthetic fibers such as acrylic, is mixed, In order to form fine pores, they may be mixed with small graphite particles having a wide particle size distribution.

  In addition, the carbon agglomerate obtained by firing the molded product in an oxygen-free atmosphere is highly hydrophobic, and even when immersed in water, it retains bubbles and prevents water penetration, ensuring hydrophilicity that promotes water permeation. Indispensable, the present invention is a dilute solution in which silazane is dissolved in xylene, mineral terpene, or a high boiling point aromatic solvent, or a modified polyvinyl alcohol having a carbonyl group and a hydrazide-based cross-linking in order to ensure a sustained effect. After impregnating the solution containing the agent, the carbon agglomerate is heat-dried at 400 to 450 ° C. to immobilize a thin film that ensures water resistance.

  This humidifying element can efficiently perform the water supply from the carbon aggregate fine pores at the lower position and the diffused water vapor to be heated and diffused in the large pores at the upper position. In addition, since the minute water contained in the fine pores is efficiently heated and vaporized, a feature that enables quick and fine adjustment of the vaporization amount is imparted.

  In addition, the fine pores in the lower position can be easily eliminated without blocking the pores by inhibiting the intrusion of precipitates such as scales and dirt generated with the use of hard water or additional supply of water. Was granted.

  On the other hand, when a carbon aggregate obtained by mixing and baking a shell shell pulverized product is used, moisture for humidification has antibacterial properties, and a hygienic humidification mode can be ensured.

  Specifically, the small gap in the lower position where the humidifying element is submerged efficiently supplies water to the upper position by capillary action and does not supply an excessive amount of water, and the large pores in the upper position do not store water. An arbitrary amount of water vapor can be ensured without applying an excessive amount of heat for dielectric heating.

  In addition, the humidifying element has a configuration in which the interface of the aggregates having pores of different sizes is arranged with conical irregularities, so that even if water supply becomes insufficient due to rapid heating and water vapor dissipation, the height of the humidifying element is high. With the formation of temperature distribution in the direction, rapid decay of water vapor generation was avoided.

  In addition, the siloxane formed inside the pores or the modified polyvinyl alcohol insolubilized in water retains the thin film formed without blocking the pores and has hydrophilicity, so that water permeation into the pores is facilitated for vaporization. Water can be supplied smoothly.

  In addition, since the submerged portion of the humidifying element has fine pores, the calcium or magnesium ion concentration increases with repeated water replenishment when the hardness of the water used is high or without washing, and temporary hard water is removed. This is effective in preventing the occurrence of a problem that scale (scale) accompanying decarbonation of the formed hydrogen carbonate precipitates and enters and seals into pores provided on the outer wall surface of the carbon aggregate. Moreover, while inhibiting the penetration | invasion of a scale, this was able to be easily excluded about the scale adhering only to the surface.

  In addition, since organic fibers are mixed with the molding material, it forms continuous pores that are traces of decomposition and scattering in the firing stage to obtain carbon aggregates. The rate can be changed, and the water supply capacity to the humidifying element can be set arbitrarily.

  The mode of the pores provided in the carbon aggregate of the humidifying element according to the present embodiment will be described in detail with reference to the schematic partial sectional view of FIG. The carbon aggregate used as the humidifying element 6 of the humidifier 20 (see FIG. 2) is held by a carbon binding material obtained by carbonizing a contact portion between graphite particles by firing treatment in an oxygen-free atmosphere of phenol resin. , Voids formed between the particles can be secured. At the upper position of the humidifying element 6, graphite particles having a large particle diameter of 1 to 3 mm are formed, and the particles come into contact with each other to form voids of about 0.1 to 1 mm as the pores 3 a. The lower position is formed by filling graphite particles having a small particle size of 300 μm or less and holding pores 3b which are fine voids of 50 μm or less.

  As shown in FIG. 2, the humidifying element 6 is disposed in the water tank 7 of the humidifier 20 with the lower part submerged, and the supply and penetration of water 8 is supplied to the upper position by capillary action of the fine pores 3b in the lower part. Then, the pores 3a are filled and held. Further, the humidifier 20 is provided with an intake / exhaust duct 9 (ventilation duct) in an exposed portion provided on the upper portion of the humidifying element 6, allowing the indoor dry air 10 to pass through at an arbitrary speed and exhausting the water vapor. The air 11 is discharged from the humidifier 20. At this time, a negative pressure is generated by the venturi effect in the pores 3a located at the upper portion of the humidifying element 6 and arranged on the exposed surface, and the inside of the pores 3a is decompressed to generate water vapor. As a result, at the lower position of the humidifying element 6, the penetration of water 8 was promoted to enable continuous supply.

  The Venturi effect is a “law of energy conservation that occurs along the flow” in which the flow velocity is increased by restricting the flow of the fluid, and a lower pressure is generated than in the low-speed portion. A device that uses water vapor or air as a fluid according to the present principle is generally called an ejector, and the air injected into the pipe creates a low pressure inside the tube by the principle of spraying, and sucks water.

  On the other hand, since the upper position is composed of large particles having a narrow particle size distribution, it is difficult to continue the water supply from the lower position to the large voids provided between the particles, but water vapor is easily discharged. . For this reason, the water vapor evaporated from the lower position is further heated and humidifies without containing steam as a medium for diffusing various bacteria, so that the periphery of the humidifier 20 is not wetted.

  Further, when the graphite particles and the phenol resin are mixed with the humidifying element 6, a molded product obtained by using a molding material obtained by mixing scallop shells as pulverized fine particles of 300 μm or less is fired in an oxygen-free atmosphere. I do. Calcium, which is the main component of the calcined shell, is characterized by low reactivity and low calorific value as compared with quick lime (CaO) and long-lasting alkali effect. That is, the strong alkalinity which shows a high PH value (hydrogen ion index) can be provided with an antibacterial effect for a long time on anaerobic bacteria that promote selective decay and aging.

  The alkali effect will be described. Shell calcined calcium is less reactive and less calorific than quick lime (CaO). Moreover, the alkali effect lasts for a long time compared with quicklime. The bactericidal effect due to the alkali effect is very strong, and a bactericidal effect appears when a strong alkali component passes through the cell wall and hydrolyzes the cytoplasm. In addition to sterilizing bacteria such as spoilage bacteria, it suppresses oxidation (rot) of substances in order to lower the redox potential. That is, having strong alkalinity can be expected to have a long-term antibacterial effect of sterilization of anaerobic bacteria that increases the PH value (hydrogen ion index) and promotes the spoilage and aging of selective substances. It is concluded that the antibacterial effect of scallop shell ceramic solution is not due to the lysis reaction seen in NaOH solution or KOH solution, but due to the aggregation reaction caused by Ca2 + contained in the solution binding to the protein fraction of cells. did.

  In addition, calcium carbonate, which is the main component of natural shells, has the effect of adsorbing formaldehyde, which causes sick house syndrome, VOC (volatile organic compounds), agricultural chemicals (saprol emulsions and phthalates, etc.), mercaptans, It is also effective for methane gas. In the present embodiment, scallops are used for the shells, but similar effects can be provided by using shells of oyster shells and oysters instead.

  VOC (volatile organic compound) is a general term for organic chemical substances that readily volatilize in the atmosphere at normal temperature and pressure. Specific examples include toluene, benzene, chlorofluorocarbons, dichloromethane, and the like, which are widely used because they are important substances as solvents and fuels. However, when released to the environment, it causes health damage such as pollution.

The obtained humidifying element 6 was formed with a thin film that imparts hydrophilicity to the pores so that the carbon aggregates of the main component exhibit strong water repellency so as to smoothly contain water. Perhydropolysilazane used here is a completely inorganic polymer composed only of Si—H, N—H, and Si—N bonds to prevent hydrolysis by reacting with a substance having an OH group. A dilute organic solvent solution dissolved in xylene is used as the coating solution. Here, after forming a thin film by impregnating at least the fine pores at the lower position, this is fired in a high-humidity and high-temperature atmosphere to react with moisture and oxygen, and dense high-purity silica at about 450 ° C. A thin film of (amorphous SiO ₂ ) was formed to obtain high hydrophilicity.

  Perhydropolysilazane, which is a hydrophilic agent, is composed only of Si—H, N—H, and Si—N bonds, and reacts with a substance having OH (hydroxyl group) to be hydrolyzed. Therefore, in addition to water and alcohol solvents, Solvents that dissolve water, such as ketones and esters, are also not preferred. Therefore, currently used solvents are mainly xylene, mineral terpenes, high-boiling aromatic solvents, etc., and it is preferable to select an optimum solvent according to matching with the substrate, application, purpose, construction environment, and the like.

  Next, the mechanism of vapor diffusion of the humidifying element 6 described above will be described with reference to the schematic cross-sectional view of FIG. As shown in FIG. 2, the humidifier 20 is provided with a dielectric coil 12 in proximity to the bottom surface, and a humidifying element with a lower part submerged in a water tank 7 having a mechanism for holding the water level within a certain range. 6 is placed.

  The humidifying element 6 is formed of graphite having a fine and wide particle size distribution that forms a lower position to be submerged and having conical irregularities on the upper surface, so that the amount of heat generated by the concave portion adjacent to the dielectric coil 12 is increased. On the other hand, the water vapor is actively diffused, but the water held in the convex portion relatively gently diffuses the water vapor and the water tends to remain. The amount of water held in the water tank 7 decreases and the temperature of the humidifying element 6 rises as the amount of water supply due to capillary action decreases, and the amount of water vapor dissipates a large amount of water remaining on the convex part. The tendency to aim for stabilization comes to be exhibited.

  A carbon aggregate, which is a porous body in a state where it is submerged and supplied to an arbitrary position in the water tank 7, generates heat by the dielectric coil 12 provided in the lower part. Therefore, only the amount of heat for vaporizing the small amount of water 8 held inside the humidifying element 6 is applied, and it is not necessary to boil a lot of water 8 held in the water tank 7, so that the humidifying function is achieved with extremely high efficiency. It is possible.

  In addition, the lower position of the humidifying element 6 is a carbon aggregate against the precipitation of scale (scale) due to decarboxylation of hydrogen carbonate, which forms temporary hard water, as the concentration of calcium and magnesium ions in the water increases with repeated use. This is effective in preventing the problem of intruding into the fine pores 3a and 3b provided on the outer wall surface of the outer wall and sealing it, and the scale attached to the surface has an aspect that can be easily eliminated simply by wiping it.

The temporary hard water will be described. Hard water can be divided into two types according to the contained ions: temporary hard water and permanent hard water. The former is river water, groundwater, etc. that flows through limestone topography, which contains a lot of calcium carbonate and can be softened by boiling. When boiling hard water temporarily, calcium carbonate can be precipitated.
Ca (HCO ₃ ) ₂ → CaCO ₃ + H ₂ O + CO ₂
In addition, the calcium salt can be precipitated by adding a water softening agent.
Ca (HCO ₃ ) ₂ + Na ₂ CO ₃ → CaCO ₃ + 2NaHCO ₃
The latter contains calcium and magnesium sulfates and chlorides and does not soften even when boiled. It was water that was not drinkable before, but now it can be easily softened with ion exchange resin.

  The humidifying element 6 uses a phenol resin as a binder for a small product having a particle size of 300 μm or less and a large product having a particle size of 1 to 3 mm, and heats the phenol resin by slightly pressing in a mold. Harden and mold.

  For small graphite products, phenol and formaldehyde are added while stirring so that water in which quaternary ammonium salt type cationic surfactant is dissolved is uniformly dispersed at any temperature, and the resulting emulsion changes transparently. Continue the reaction until. The phenol resin obtains a micelle structure by a surfactant having graphite particles as a core, and a polymerization reaction proceeds to form a composite 1 that retains a resin film on the outer surface of the graphite particles and is complexed. The composite 1 uses a forming raw material that forms a complex by performing a drying process under reduced pressure after collection by filtration and cleaning by washing with water.

  On the other hand, large particles of graphite are compounded by spraying a phenol / formaldehyde derivative and a curing agent diluted with a solvent such as ethanol and spraying them uniformly onto the surface. It was. This means that large size graphite cannot form a composite by forming a micelle structure of a surfactant, so that the phenol resin uncured product cannot hold the reaction product on the surface of the graphite particles in water. by.

  The quaternary ammonium salt type cationic surfactants used here are preferably alkyltrimethyl type and alkyldimethylbenzyl type cationic surfactants, and the alkyl part also has a high C number of 10 such as high-purity lauryl, palmityl, stearyl and behenyl. Those of about 20 are effective. Surfactants have protective colloid properties and exhibit polyelectrolyte behavior in solution to form ion complexes with anionic water-soluble resins, so that the resin dispersed in the solution is not excessively large. Particles of 0.3 mm or less, which are the same as the carbon powder particles used in the examples, are preferable because they have a function of forming a uniform coating film in a spherical shape and are excellent in fluidity.

  Next, a molding material using small graphite particles is put into a mold in which the above-described molding material is heated to 160 ° C. to form conical unevenness. At this time, a rugged shape having a height of about 10 to 25 mm is ensured by shaking a wooden mold provided with a reversed shape surface of the ruggedness to be formed on the molding material. The general shape is determined depending on the water supply ability by the capillary action of water, and those with small pores can supply water to a high position in the capillary action, but the amount of water supply decreases. Moreover, considering that the pores having excessively large pores are inferior in water supply capability, it is preferable to set a suitable shape and height to obtain the steam generation amount.

  Next, a molding material having a large particle size of graphite is placed and pressurized at a low pressure of 0.1 MPa, and the binder is cured by holding for an arbitrary time to obtain a molded product. A suitable pore shape with sufficient strength to withstand practical handling when the graphite particles are sufficiently bonded to each other can be obtained by increasing the pressure depending on the pressure load of the molded product. It is preferable to use a molding material holding a phenol resin of about 25 wt% for a small particle product and about 35 wt% for a large particle size product.

  Next, after the molded product is baked at 750 ° C. or more in an oxygen-free state, hydrophilic treatment is performed inside the pores 3a and 3b in order to smoothly permeate the water 8 into the pores 3a and 3b. Hydrophilicity imparted to water-repellent carbon aggregates is achieved by applying a dilute solution in which perhydropolysilazane is dissolved in xylene, removing excess coating liquid, and then baking it in a high-temperature atmosphere at about 450 ° C. Reacting with oxygen, a dense high-purity silica (amorphous SiO2) film was obtained. The retention of substances that express hydrophilicity is extremely low in the reliability of adhesion with carbon aggregates that do not have polar groups on the surface, so the anchor effect by impregnation into the pores of the pore walls provided in the aggregates In order to utilize this, it is preferable to use a low-viscosity solution.

  Next, using the manufacturing method described above, a submerged portion made of graphite with a small particle diameter is 25 mm, a cone-shaped unevenness height is 20 mm, and a large particle diameter graphite is laminated to form a block shape of 80 mm square with a total height of 50 mm. The humidifying element comprising the above-described humidifying element is immersed in a water tank to a depth of 30 mm, and a ventilation duct is disposed on the upper part, and the humidifying element comprising the embodiment of FIG. 2 is disposed so as to be placed on the dielectric coil via the water tank, The amount of water vapor diffused when heated while maintaining a 150 W energization amount was compared.

  The amount of water vapor diffused was evaluated based on the reduced weight of water from 15 minutes after the start of heating, and the results are shown in FIG.

  The evaluated samples are six types of Comparative Example 1 to Comparative Example 4, Example 1 and Example 2. As shown in FIG. 3, the others are compared on the basis of Example 1 (165 g) having the largest weight loss of water.

  The second embodiment is different from the first embodiment only in that the intake / exhaust duct 9 is not used. Since the intake / exhaust duct 9 is not used, the reduced weight of water is reduced to 110 g as compared with 165 g of the first embodiment. Also from this result, the effect of the intake / exhaust duct 9 is obvious.

  Comparative Example 1 is different from Example 1 only in the graphite configuration of the humidifying element 6. Whereas the graphite configuration of the humidifying element 6 of Example 1 is a laminated structure (# 4) having an interface shape with conical unevenness, the graphite configuration of Comparative Example 1 is a structure having only a small particle size (# 1) ). Thereby, the reduced weight of water is reduced to 30 g with respect to 165 g of Example 1.

  Comparative Example 2 is different from Example 1 only in the graphite configuration of the humidifying element 6. Whereas the graphite configuration of the humidifying element 6 of Example 1 is a laminated structure (# 4) having a spindle-shaped unevenness as an interface shape, the graphite configuration of Comparative Example 2 is a structure having only a large particle size (# 2). ). Thereby, the reduced weight of water is reduced to 25 g with respect to 165 g of Example 1.

  Comparative Example 3 is different from Example 1 only in the graphite configuration of the humidifying element 6. Whereas the graphite structure of the humidifying element 6 of Example 1 is a laminated structure (# 4) having an interface shape with pyramidal irregularities, the graphite structure of Comparative Example 3 is a laminated structure having a small particle size and a large particle size. Body (# 3). Thereby, the reduced weight of water is reduced to 40 g with respect to 165 g of Example 1.

  Comparative Example 4 differs from Example 1 only in that hydrophilicity is not imparted. Thereby, the reduced weight of water is reduced to 15 g with respect to 165 g of Example 1.

  From the above results, the humidifying element 6 in which the pores provided in the interior of the carbon aggregates in which the graphite having a small particle size and the large particle size formed a conical uneven structure is subjected to a hydrophilic treatment based on the present embodiment is provided. It was confirmed that the humidifier 20 provided had significantly higher water vapor diffusion and superior humidification performance than the comparative example provided with the humidifying element 6 that deviated from the above conditions.

  In the present embodiment, high-purity silica (amorphous SiO2) is used to impart hydrophilicity, but the same effect can be obtained by using water-insoluble PVA (polyvinyl alcohol) instead. For example, D polymer of Nippon Vinegar Bipovar Co., Ltd. has a highly reactive carbonyl group and is highly reactive with a hydrazide-based cross-linking agent (adipic acid dihydrazide). A hydrophilic thin film that is insoluble in hot water can be formed in the pores by impregnating a dilute solution of the mixture dissolved in 1 and then drying.

  PVA (polyvinyl alcohol) is represented by D-polymer of Nippon Vinegar Bipovar Co., Ltd., and has a highly reactive “carbonyl group” as a modifying group other than a hydroxyl group / acetic acid group and is reactive with hydrazide groups and amino groups. In particular, it is highly reactive with a hydrazide-based crosslinking agent (adipic acid dihydrazide), can form a coating film / film that does not dissolve in hot water, and can produce a highly transparent gel.

  Moreover, although the semi-hardened phenol resin was used as the binder of graphite, instead of this, a mixture of petroleum or coal tar and pitch may be used.

  DESCRIPTION OF SYMBOLS 1 Composite, 2 compound, 3a porosity, 3b porosity, 6 humidification element, 7 water tank, 8 water, 9 intake-exhaust duct, 10 indoor dry air, 11 air exhausted including water vapor, 12 dielectric coil, 20 humidifier .

Claims (3)

  A lower part comprising small pore size graphite having fine pores capable of supplying moisture by capillary action, an upper part comprising large grain size graphite and large pores independent of capillary action; A humidifying element made of a carbon aggregate molded product having a hydrophilic property inside the pores is formed in the water tank having a dielectric coil on the bottom outer surface. A humidifier, wherein the steam is held in a state where it is not immersed in water, and vapor is released by electromagnetic induction heating.   It is structured to allow indoor dry air to pass through an intake / exhaust duct disposed above the exposed portion provided above the humidifying element at an arbitrary speed, and the decompressed state in the pores due to the venturi effect (Venturi effect) The humidifier according to claim 1, wherein water vapor is discharged.   2. The humidifying element according to claim 1, wherein the molded product of the carbon agglomerate has a structure in which graphite particles having a wide particle size distribution are arranged with small particles in a portion submerged in the water tank. The humidifier described.

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