JP2015202135A - Air cleaning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaning system that generates heat by energization, has a positive resistance-temperature characteristic, can set the Curie point temperature at any temperature, and can heat-efficiently clean the air in a short period of time.SOLUTION: The air cleaning system comprises: a heating-element housing-device 300 in which a porous-resistance molded-body 100 having a porosity within a range of 5% to 50% and having a positive resistance-temperature characteristic, obtained by mixing aluminum powder, graphite powder, gairome clay powder, and wood flour into a sintering raw-material mixture, adding, to the whole sintering raw-material mixture, water and/or binder that does not cause movement due to the difference in density, kneading the same, subjecting to molding by applying pressure, and subjecting to sintering the same, and a platinum group catalyst 19 dissolved with inorganic solvent and/or organic solvent are integrated together by melt-spraying metal onto both sides of the porous-resistance molded-body 100 to make it into electrode and have it support the platinum group catalyst, and housed in a housing 310; and a heat exchanger 400 in which a high-temperature cleaned-air is introduced from the housing 310 of the heating-element housing-device 300, and during the period until the cleaned-air is discharged, heat-energy is supplied to the to-be-clean treated air supplied to the housing 310 of the heating-element housing-device 300.

Description

The present invention utilizes a porous resistance molded body having a positive temperature coefficient having the same characteristics as a PTC (Positive Temperature Coefficient) thermistor. This positive resistance temperature characteristic has a low resistance value at room temperature, It has a resistance temperature characteristic that the resistance value suddenly increases when it reaches a predetermined temperature, and this positive resistance temperature characteristic is a porous resistance molded body, a deodorant with a catalyst function that enhances the function as a catalyst, The present invention relates to an air purification device that purifies by sterilization and removal of specific substances. This air purification device is used for exhaust gas, drainage, dust collection, powder, dairy manure treatment, etc. of factory or vehicle, and deodorization and sterilization from such exhaust gas, drainage, dust collection, powder, dairy manure treatment, etc. Used to purify by removing certain substances.

Sintered bodies obtained by firing powders of metals, metal oxides, and nitrides can be used in various fields because of their denseness, and many techniques have been developed. In particular, an aluminum material as a metal material is lightweight, inexpensive, and has good workability. Therefore, an aluminum material has been conventionally studied as a raw material for producing a sintered body.
However, since aluminum materials are very easily oxidized and a stable and hard oxide film is easily formed on the surface thereof, it is difficult to obtain a sintered body having high mechanical strength even if it is sintered as it is.
Nevertheless, the present applicant has previously filed a patent application described in Patent Document 1 relating to the invention of a sintered body using aluminum powder. The invention of the sintered body described in Patent Document 1 contains aluminum fine particles and an organic binder and / or an inorganic binder, and a sintered raw material mixture in which these are uniformly mixed is press-molded at room temperature and non-oxidized. It was sintered at a temperature in the range of 1200 ° C. to 1800 ° C. in an atmosphere, and thereby a sintered body having excellent mechanical strength was obtained.

In Patent Document 1, since sintering is performed at a temperature in the range of 1200 ° C. to 1800 ° C., the obtained sintered body is mainly alumina, and does not generate heat and is used for resistors, resistance heating elements, and the like. There was no suitable conductivity. For this reason, the application field could not be expanded as a sintered body using an aluminum material.
Conventionally used heating elements have been developed that are made of a metal material such as a nichrome alloy or a cantal (nickel / chromium) alloy or a ceramic material such as silicon carbide (SiC). However, when a heating element made of a metal material is used as a heating element for liquid heating, an insulator such as magnesia needs to be disposed around the metal, and further, the whole needs to be wrapped with a metal sheath. In addition, the heat generation efficiency was low because the surface was radiated by a metal wire. On the other hand, a heating element made of a ceramic material is brittle and vulnerable to thermal shock caused by a rapid temperature change, and rapid heating and rapid cooling are difficult.

The present inventor pursued these problems, and in Patent Document 2, provided an invention of a heating element having a positive resistance temperature characteristic.
The heating element of the positive resistance temperature characteristic is provided with a plurality of through-holes together with outer shape molding by compression molding or extrusion molding of a sintering raw material mixture mainly composed of aluminum powder, graphite powder, and clay powder, It comprises a molded resistor obtained by sintering it and an electrode provided on the molded resistor, and the molded resistor has a low resistance at room temperature and a positive resistance whose resistance increases rapidly when the temperature rises to a predetermined temperature. Since it has temperature characteristics, by forming a sintered raw material mixture formed by mixing aluminum powder, graphite powder, and clay powder for ceramics under pressure, these sintered raw material mixtures are strong. It becomes a dense solid state. Therefore, a high resistance positive resistance temperature characteristic is obtained by sintering in this state.

In addition, because graphite powder is mixed with the porous resistance molded body, the graphite powder adheres to the surface of the aluminum powder, and the aluminum powder is covered with the graphite powder. Even if it reaches, no sintering failure occurs in which the aluminum melts and is ejected to the surface, and the sintering raw material mixture is compounded by firing to form a positive resistance temperature characteristic heating element having voids. The resistance temperature characteristic heating element generates heat when energized. As a result, a porous positive resistance temperature characteristic heating element having high mechanical strength and resistance heating upon energization becomes a resistance heating element that can rise to a specific temperature. Can be used as

In particular, the porous heating element having a positive resistance temperature characteristic obtained in this way has a high temperature rise rate by energization and a temperature decrease rate by energization release for a large volume, and the heat generation temperature becomes constant depending on the energization amount. Therefore, resistance control in the manufacturing process is easy. That is, by selecting the particle shape and particle size distribution of the raw material, adjusting its blending amount, and adjusting the pressure during molding to adjust the density of the positive resistance temperature characteristic heating element, Furthermore, by adjusting the sintering temperature to adjust the sintering density, the resistance value of the porous resistance molded body can be controlled to control the heat generation temperature due to energization. In addition, by adjusting the resistance distribution of the porous resistance molded body by adjusting the molding shape by the mold shape at the time of molding, adjustment of the filling amount at the time of molding, partial pressure adjustment at the time of molding, etc. A specific portion of the molded body can be heated to a specific temperature.
Therefore, the porous heating element having a positive resistance temperature characteristic according to the present invention is suitable for use as a resistance heating element, and particularly suitable for use as a heating element that is heated on the surface. In addition, it is chemically strong such as acid. In this way, a porous positive heating element having high mechanical strength and energizing heat generation and suitable for use as a resistance heating element is obtained. And, since it is resistant to heat shock and can be converted into water vapor instantly even when a water droplet is dropped, it can be used as a heat source for humidity control simultaneously with temperature control.

JP2012-36470 JP2013-4367

In particular, Patent Document 2 solves the problem of Patent Document 1. The voids in the heating element having a positive resistance temperature characteristic are the result of repeated experiments by the inventor. As a result, the voids in the porous resistance molded body are sufficiently strong even if they are used as a resistance heating element within a predetermined range. In addition, it was found that energization heat generation can be secured. That is, when there are few voids in the porous resistance molded body, the resistance value of the positive resistance temperature characteristic heating element is small, and the heat generation by energization is impaired. On the other hand, when there are too many voids in the porous resistance-molded body, the strength is not sufficient for use as a resistance heating element, and the electrical conductivity is impaired.
The voids of this porous resistance molded body are measured by measuring the volume and weight of the formed porous resistance molded body in a dry state, measuring the weight in a state impregnated with water, and measuring the weight after drying again. The change in weight is replaced with porosity. Moreover, the paraffin was impregnated in the place deaerated in a vacuum by the “paraffin permeation apparatus (ULVAC DA-15D)” and calculated from the change in the weight, as a result, there was no significant difference. Therefore, here, the former and the latter will be described without distinction. Therefore, a heating element having a positive resistance temperature characteristic with good heat dissipation efficiency can be obtained without generating heat by energization and increasing the temperature above a predetermined temperature.
In this way, although positive resistance temperature characteristics that can withstand high power with good heat dissipation efficiency can be obtained without generating heat above the predetermined temperature, the surface area due to the voids can be increased. However, its use was limited to electric heating. Further, it has not been utilized as a heating element having a positive resistance temperature characteristic.
Generally, problems with refrigerators and freezers, such as the progress of decay of stored fruits, vegetables, fresh flowers, etc. due to a small amount of ethylene gas released from fruits, vegetables, etc. stored in refrigerators, freezers However, if you try to purify the air in the refrigerator or freezer by deodorizing, sterilizing, or removing specific substances, if you try to treat it with a catalyst in a short time and heat efficiently, It was impossible to use the heat source inside.

Therefore, the present invention has been made to solve such a problem, has a positive resistance temperature characteristic, can set its Curie point temperature to an arbitrary temperature, and does not rise above a predetermined temperature. An object of the present invention is to provide an air purifying apparatus that can be used efficiently in a short time using a catalytic function capable of purifying air, and purifies by deodorization, sterilization, and removal of a specific substance.

  The air purification device according to claim 1 is a sintered raw material mixture mixed by blending aluminum powder 30-50 wt%, graphite powder 5-10 wt%, clay powder 30-50 wt%, wood powder 0-10 wt%, and the whole On the other hand, water that does not move due to a difference in specific gravity and / or a binder of 0 to 25 wt% is added and kneaded, pressure is applied to form, and it is sintered and voids in the range of 5% to 50% And having a positive resistance temperature characteristic in which the resistance is low at normal temperature and increases rapidly when the temperature rises to a predetermined temperature when energized, and metal on both sides of the porous resistance molding And a platinum group dissolved in an inorganic solvent and / or an organic solvent carried on the porous resistance molded body by heating the porous resistance molded body by supplying a voltage between the electrodes. Integrated with the catalyst A heating element housing device comprising a porous resistance molded body and the electrode and a housing for housing the platinum group catalyst, and high-temperature purified air is introduced from the housing of the heating body housing device, and the purified air is discharged. In the meantime, a heat exchanger for supplying heat energy to the air to be purified supplied to the housing of the heating element housing device is provided.

The porous resistance molded body is a sintered raw material mixture mixed by blending with aluminum powder, graphite powder, clay powder, and wood powder, and kneaded by adding water to the whole, compression forming or extrusion molding More precisely, when it is energized, it has a low resistance at room temperature and has a positive resistance temperature characteristic that increases rapidly when it rises to a predetermined temperature. It has characteristics.
A sintering raw material mixture mainly composed of aluminum powder, graphite powder, and clay powder is kneaded by adding water and formed into an arbitrary shape by compression molding or extrusion molding using a mold. For example, it is formed and sintered in a temperature controlled electric furnace within a range of 900 ° C. to 1200 ° C. Sintering in the temperature controlled electric furnace in the range of 900 ° C. to 1200 ° C. is a result of repeated experiments by the inventors, and as a result, sufficient sintering is not performed at temperatures lower than 900 ° C., resulting in poor sintering. It was confirmed that the lower limit of the sintering temperature was 900 ° C., and when it exceeded 1200 ° C., it was confirmed that the obtained formed body had a high probability of not having positive characteristics. The upper limit of the sintering temperature is 1200 ° C.
Here, by forming a sintered raw material mixture in which aluminum powder, graphite powder, and clay powder for ceramics are mixed according to a specific composition, by applying pressure, these sintered raw material mixtures are strong and dense. It becomes a solid state. Moreover, you may use it, melt | dissolving a binder with respect to water. Therefore, by sintering in this state, a high-strength porous resistance molded body can be obtained. Wood powder is not only related to porous voids but also effective in a reducing atmosphere during sintering, but if it is too much, the inside of the furnace may be deteriorated with soot, so it is better to use less.
The clay powder is a clay powder for ceramics as a mineral powder, and for example, glazed clay, kibushi clay, kaolin, feldspar, and ceramic stone powder are used. The powder of the above-mentioned clay, kibushi clay, kaolin, feldspar, and porcelain is usually called mineral powder and is a clay powder for ceramics.
A porous resistance molded body of a sintering raw material mixture mainly composed of aluminum powder, graphite powder, and clay powder has a low resistance at room temperature, and a positive resistance temperature at which the resistance rapidly increases when the temperature rises to a predetermined temperature. Has characteristics. Further, the one or more through-holes provided in the porous resistance molded body are not particularly limited in cross-sectional shape, but those having a small air resistance and a large surface area are suitable.

  Here, as the aluminum powder, for example, those having an irregular shape (needle shape, spindle shape, etc.) manufactured by an atomizing method (spray type) are used. The median diameter measured by the laser diffraction / scattering method is in the range of 30 μm to 75 μm and the particle diameter measured by the sieve test method is less than 150 μm, preferably the median diameter is in the range of 35 μm to 65 μm. Yes, the particle diameter is less than 100 μm.

By the way, according to definitions of terms in the text and explanation of JIS Z 8901 “Test Powder and Test Particles”, the median diameter is the number (or mass) larger than a certain particle diameter in the particle size distribution of the powder. ) is the particle diameter when occupying 50% of its Zenkonatai (diameter), i.e., a particle size of oversized 50%, usually expressed as the median diameter or 50% particle size and good D _50. By definition, the size of the particle group is expressed by the average particle diameter and the median diameter, but here, it is a value measured by the display of the product description and the laser diffraction / scattering method.
The “median diameter measured by the laser diffraction / scattering method” is a particle whose cumulative weight part is 50% in the particle size distribution obtained by the laser diffraction / scattering method using a laser diffraction particle size distribution measuring apparatus. This refers to the diameter (D ₅₀ ).
Of course, the above numerical value is a value including an error due to measurement or the like, and does not deny an error of several percent. From the viewpoint of this error, as long as it approximates a normal distribution, the difference from the average particle diameter is very small, and it can be considered that the average particle diameter is equal to the median diameter.

  The “sieving test (sieving test method)” is a test method for measuring the particle size distribution by sieving the powder to be measured using a standard sieve having openings defined by JIS-Z-8801. It means something. It is a method of measuring particle size and particle size distribution using a standard sieve. The expression of the particle size and the particle size distribution is expressed as a ratio of the used sieve opening (μm) and the remaining amount on the sieve (oversize) or the amount passing under the sieve (undersize) to the whole.

  As the carbon powder, for example, graphite powder that has low thermal conductivity and does not react with the aluminum powder even at high temperatures is selected. Here, any material that does not change its state at a temperature lower than the melting point (668 ° C.) of the aluminum powder may be used, and examples thereof include powdery materials such as graphite, carbon black, activated carbon, and carbon fiber. Carbonaceous material fibers can be synthesized from petroleum pitch. Further, the purity of the graphite powder is preferably 90% or more. The graphite powder may be artificial graphite or natural graphite. That is, the carbon powder used in the embodiment of the present invention contains a mixture other than carbon that does not change its state at a temperature lower than the melting point of the aluminum powder and carbon. 100% does not exist. In terms of purity, the purity of carbon decreases in the order of diamond, graphite, and graphite. In the present invention, it is the purity carried out with graphite or the like.

Furthermore, the sintering raw material mixture in which the aluminum powder, the carbon powder, and the powder of the inorganic oxide material are mixed with an amount of water and / or a binder that does not move due to the difference in specific gravity is formed by applying pressure, When the gap between 5% to 50% and the powder of the aluminum powder, the carbon powder, and the inorganic oxide material are roughly specified and energized as an electrical resistor This is a porous resistance molded body having a positive resistance temperature characteristic in which the resistance value is low at room temperature and the resistance value increases rapidly when the temperature rises to a predetermined temperature. The binder uses 30% of polyvinyl alcohol (PVA) aqueous solution as 0-25 wt% water.
In addition, the platinum group catalyst dissolved in the inorganic solvent and / or organic solvent filled in the porous resistance molded body is the fifth period, the sixth period, the eighth, ninth, tenth in the periodic table among the elements. It is a generic term for elements located in the group, that is, ruthenium, rhodium, palladium, osmium, iridium, platinum, etc., whose physical properties and chemical properties are very similar to each other, and here is a catalyst selected from them, It is dissolved in an inorganic solvent and / or an organic solvent.

The electrode formed by spraying metal on both sides of the porous resistance molded body is formed at the end of the porous resistance molded body, and is formed at an end face or a part of the outer surface and an end face or a part of the inner face and the end face. Or it can also be made into a part of end surface or an outer surface, and a part of inner surface. In any case, it is sufficient if an area capable of generating resistance is obtained.
Here, since the electrodes formed at both ends of the porous resistance molded body are electrode films formed by metal spraying, the connection with the porous resistance molded body can be formed by bonding under a large surface area. The resistance value on the film side can be reduced, and the electrode film hardly deteriorates even when used for a long time. The electrodes on both sides provided in the porous resistance molded body are formed by metal spraying, which means that at least an electrode film formed by metal spraying is required. Leads and electrode terminals can be omitted or connected.
Further, the heating element housing device is one in which the porous resistance molded body, the electrode, and the platinum group catalyst are integrated and accommodated in a housing, and the porous resistance molding is integrated in the housing. Any number of the body, the electrodes, and the platinum group catalyst may be accommodated, and any number of the platinum group catalysts may be bundled together. The housing at this time may be single or double. In particular, the heating element housing device is not installed inside a space to be purified, such as a freezer or a refrigerator, but can be eliminated from the heat energy by being installed outside.
The heat exchanger introduces purified air purified by high temperature deodorization, sterilization, and removal of a specific substance from the housing of the heating element housing device until the purified air is discharged from the heat exchanger. In the meantime, heat energy is given to the air to be purified which is supplied to the housing of the heating element housing device and which should be subjected to deodorization, sterilization and removal of specific substances. This heat exchanger is not installed inside the space to be purified, such as a freezer or a refrigerator, but it can eliminate heat energy loss by installing it outside.

The air purification apparatus according to claim 2 further includes a blower that sucks purified air from the heat exchanger or supplies purified air to the heat exchanger.
Here, a blower that sucks purified air from the heat exchanger or supplies purified air to the heat exchanger is installed in the heat exchanger, so that the blower has an organic substance of 300 ° C. and an inorganic substance of 500 ° C. Since it is not used in a temperature environment, it can be used in an environment with a low temperature where insulation deterioration does not occur.

The heat exchanger of the air purification device according to claim 3 has a plurality of heat exchangers for one heating element housing device, and the air flow for heat exchange in the heat exchanger purifies with the purified air flow. This is set as heat exchange with the air flow.
Here, the two heat exchangers are independent of each other and prohibit heat conduction between the components constituting the heat exchanger, and exchange heat between the purified air flow and the air flow to be purified. Is to do. The heat exchange at this time is a temperature at which thermal equilibrium is maintained.

5. The heat exchanger of the air purification device according to claim 4, wherein a plurality of heat exchangers are provided for one heating element housing device, and the air flow that exchanges heat in the heat exchanger purifies the purified air flow. Heat exchange with the air stream to be cleaned and heat exchange between the outside air and the purified air stream or between the outside air and the air stream to be purified.
Therefore, at least one heat exchanger performs heat exchange between the purified air flow and the air flow to be purified with respect to one heating element housing device, and the other heat exchangers are connected to the outside air. The heat exchange between the purified air flow or the outside air and the air flow to be purified is performed. Since both heat exchangers have independent components, the heat conduction between them is cut off, and the heating element housing device is purified. Even if the air temperature is high, it can be lowered to the outside temperature. In particular, a heat exchanger for exchanging heat between the outside air and the purified air flow or between the outside air and the air flow to be purified can be simply interpreted as a heat dissipation means.

In the porous heating element with a catalytic function of the air purification device according to claim 5, the sintered raw material mixture is a mixture of metal silicon powder 5 to 10 wt% and iron powder 0 to 10 wt% as a semiconductor.
Here, the metal silicon powder of 5 to 10 wt% increases the current-carrying stability to ensure the current-carrying property as a material that does not oxidize. Moreover, 0-10 wt% of iron powder can be used for resistance value control which functions as a resistor, and can exhibit the stable performance as a heat generating body. However, the mixing of the metal silicon powder and the iron powder is not recommended to be mixed in a large amount because the property as a positive characteristic heating element having a positive temperature coefficient having the same characteristics as the PTC thermistor is deteriorated.

  The platinum group catalyst of the air purification device according to claim 6 is palladium, or an alloy composed of a combination containing palladium such as palladium and platinum, palladium and silver, palladium and ruthenium, palladium and rhodium, or palladium containing palladium. It can be set as the structure which comprises two layers which consist of platinum, palladium and silver, palladium and ruthenium, palladium and rhodium.

  The platinum group catalyst of the air purification device according to claim 7 is ethanol 40 to 50 wt%, normal propyl alcohol 5 to 10 wt%, palladium 5 wt% or less, methanol 0.5 to 3 wt%, dispersion resin 0.5 wt% or less, residual Is formulated as water.

  Here, platinum, which is a platinum group catalyst, uses ethanol, normal propyl alcohol, methanol, and water as solvents, so it can be easily applied and impregnated, and can be applied to the surface of the porous resistance molded body and dried. it can. Basically, any palladium may be used as long as it is dissolved in an inorganic solvent and / or an organic solvent.

The air purifying apparatus according to the invention of claim 1 is a sintered raw material mixture mixed by mixing aluminum powder, graphite powder, clay powder, and wood powder, and water that does not move due to a difference in specific gravity with respect to the whole. And / or a binder and kneading, forming by applying pressure, sintering and having a void in the range of 5% to 50%, and when energized, the resistance value is low at room temperature, A porous resistance molded body with a positive resistance temperature characteristic whose resistance value increases rapidly when the temperature rises, and a platinum group catalyst dissolved in an inorganic solvent and / or an organic solvent is supported and adhered, and then dried. It is.
Therefore, since the sintered porous resistance molded body has voids in the range of 5% to 50%, the surface area becomes wide and the surface is used as a platinum group catalyst. The reaction rate can be increased and the reaction efficiency can be increased. Also in the experiment, a deodorizing effect was confirmed for a substance on which a platinum group catalyst acts at room temperature, and it was possible to deodorize at high speed by heating the catalyst. Regarding the deodorizing effect, it was confirmed that the organic substance can be deodorized at 300 ° C. or less and the inorganic substance can be removed at 650 ° C. or less.

The porous resistance molded body is a sintered raw material mixture mixed by blending with aluminum powder, graphite powder, clay powder, and wood powder, and kneaded by adding water to the whole, by compression molding or extrusion molding Since it is molded, dried and then sintered, the following effects are obtained.
That is, in the sintered raw material mixture, for example, if the content of aluminum powder is less than 30 wt%, the aluminum powder is too small and the electrical conductivity is impaired. On the other hand, when the content of aluminum powder exceeds 50 wt%, the portion of the aluminum powder that is not covered with graphite powder increases, which tends to cause a sintering failure in which molten aluminum is ejected to the surface in the firing process. Become. Since it is 30-50 wt% of aluminum powder, electroconductivity can be maintained and it is hard to produce poor sintering.
Also, for example, if the content of graphite powder is less than 5 wt%, the portion of the aluminum powder that is too small to be covered with the graphite powder increases, so that the aluminum melted in the firing process becomes the surface. It becomes easy to produce the sintering defect which spouts. On the other hand, if the content of the graphite powder exceeds 10 wt%, the graphite powder is too much to reduce the strength and purity of the porous resistance molded body. Is missing. Since the content of the graphite powder is 5 to 10 wt%, the sintering failure in which aluminum is ejected to the surface and the strength of the porous resistance molded body do not decrease.
And if the content of clay powder for ceramics is less than 30 wt%, for example, there is too little clay powder for ceramics, the resistance value of the resulting molded resistor is reduced, and the resistance heating of the porous heating element When used as a body, the energization heat generation is insufficient. On the other hand, when the content of the clay powder for ceramics exceeds 50 wt%, the clay powder for ceramics is too much and the electrical conductivity is impaired. However, since the present invention is set within the range, those problems Does not occur.

Further, wood powder obtained by finely pulverizing wood chips with a pulverizer is used, but a whisker-like one is preferably used. For example, by using whisker-like wood powder, raw materials such as aluminum powder, graphite powder, and clay-like clay powder are entangled in whisker-like crevice-like gaps, so that the filling property of the raw material is increased and pressure is increased in the molding process. Although the product produced by applying is made strong and dense, a porous resistance molded body can be obtained even without wood powder. Usually, it is desirable to mix 0 to 10 wt%. Therefore, according to the heating element having the positive resistance temperature characteristic of the present invention, it is surely high in strength and energizing heat generation and high in purity.
In the sintered raw material mixture, the aluminum powder content is in the range of 40 wt% to 45 wt%, the graphite powder content is in the range of 5 wt% to 10 wt%, and the mineral powder ( Since the content of the clay powder for ceramics) is in the range of 40 wt% to 45 wt%, it is possible to more reliably ensure high strength and purity as well as energization exothermicity in a porous positive resistance temperature characteristic heating element. More preferred.

And, the platinum group catalyst dissolved in the inorganic solvent and / or organic solvent attached to the porous resistance molded body, ruthenium, rhodium, palladium, osmium, iridium, whose physical properties and chemical properties are similar to each other, Platinum or the like can be used, and here, the catalyst selected from them is dissolved in an inorganic solvent and / or an organic solvent, dipped, applied, and dried, so that the production is simple.
Furthermore, the heating element housing device including the integrated porous resistance molded body and the housing housing the electrode and the platinum group catalyst can control the temperature by applying a voltage between the electrodes, and Since the housing in which the porous resistance molded body, the electrode, and the platinum group catalyst are integrated is housed in a housing, heat loss can be reduced.
Furthermore, the heat exchanger introduces high-temperature purified air from the housing of the heating element housing device, and the purification process supplied to the housing of the heating element housing device until the purified air is discharged. Since heat energy is supplied to the air to be heated, only the inside of the heating element housing device is heated to a high temperature, so there is little loss of heat energy.
In addition, since the porous resistance molded body can use a high-temperature catalyst by energization, the speed of the chemical reaction of a specific substance to be treated with the catalyst can be increased. In addition, since the platinum group catalyst does not electrically short-circuit the porous resistance molded body, it can be used stably. In particular, the platinum group catalyst can be reduced in concentration and when the aluminum powder forms a porous resistance molded body, it becomes aluminum oxide and exhibits insulating properties, so that the platinum group catalyst is energized from the porous resistance molded body. There is nothing to do.
Further, since the catalyst can be used at a high temperature by energization, it is suitable for increasing the speed of the chemical reaction of the specific substance to be treated with the catalyst. In addition, since the platinum group catalyst does not electrically short-circuit the porous resistance molded body, it can be used stably. In particular, the platinum group catalyst can be reduced in concentration and when the aluminum powder forms a porous resistance molded body, it becomes aluminum oxide and exhibits insulating properties, so that the platinum group catalyst is energized from the porous resistance molded body. There is nothing to do.

In addition, in the deodorization test with the air purification device that purifies by deodorization, sterilization, and removal of specific substances of the present embodiment performed by the inventor, compared with the deodorization device using the electric heater of the same air volume of other companies. It was confirmed that the amount of power consumption was about 1/5 to 1/3, and the size of the air purifying device to be deodorized was also about 1/5 to 1/3. In particular, in the air purifying apparatus according to the embodiment of the present invention, since the portion where the temperature rises to a specific temperature is in a limited range, the power consumption can be reduced, and the contact area with the air to be purified passing therethrough is wide. Since it is performed in the area, it was possible to make the product downsized to about 1/5 to 1/3 compared with the products of other companies.
Therefore, it can be used to discharge odors in closed rooms to the outside, and can also be used to circulate air in rooms such as animal houses and nursing homes, and removes ethylene gas from the refrigerator. It was confirmed that it can be used for deodorization, removal of germs and the like. In particular, the catalyst is firmly supported by the enormous surface irregularities and fine vents of the porous resistance molded body, and harmful gases (bad odors), germs, and fungi passing through it are oxidized into water and carbon dioxide. It was confirmed that it was decomposed and disappeared. Although it is a well-known fact that platinum group catalysts have been used for the decomposition and purification of automobile exhaust gases (hydrocarbons, carbon monoxide, nitrogen oxides) and the like by this confirmation, toxic gases and microorganisms are It can be estimated that it also has a function of oxidizing and decomposing into carbon dioxide gas.

  Further, the voids of the sintered porous resistance molded body used in the air purification apparatus for purification by deodorization, sterilization, and removal of specific substances of the present embodiment are 5% to 50%. Sintered considering the practical mechanical strength of the molded body itself and the mechanical strength on which the catalyst is supported, the heat conduction in a partial range to raise the temperature, the wide contact area with the air to be purified, etc. The porosity of the porous resistance molded body is preferably in the range of 30% to 40%. And when energized, a porous resistance molded body having a positive resistance temperature characteristic that has a low resistance value at room temperature and suddenly increases when it rises to a predetermined temperature is uniquely determined by the relationship between temperature and resistance value. Since it can be set and no control is required to maintain the temperature, the air purification device can be manufactured at low cost.

  The air purification apparatus for purifying by deodorization, sterilization, and removal of a specific substance according to the invention of claim 2 further includes a blower that sucks purified air from the heat exchanger or supplies purified air to the heat exchanger Therefore, in addition to the effect of claim 1, the blower that sucks purified air from the heat exchanger or supplies purified air to the heat exchanger is repulsive to the heat exchanger. By installing it on the heat storage device side, the fan is not used in a high temperature environment without using a heat resistant electric motor or the like that can withstand high temperature conditions.

  The heat exchanger of the air purifying apparatus according to claim 3 includes a plurality of heat exchangers for one heating element housing device, and the air flow for heat exchange in the heat exchanger purifies with the purified air flow. Since the heat exchange with the air flow should be set, in addition to the effect according to claim 1 or 2, the heat conduction of the components of the heat exchanger is cut off, and one unit has a predetermined temperature or less. Even if the temperature does not decrease, the heat exchange efficiency can be increased by separating.

  5. The heat exchanger of the air purification device according to claim 4, wherein a plurality of heat exchangers are provided for one heating element housing device, and the air flow that exchanges heat in the heat exchanger purifies the purified air flow. The effect according to any one of claims 1 to 3, wherein the effect is set as heat exchange with an air stream to be cleaned and heat exchange with outside air and the purified air stream or between the outside air and the air stream to be purified. In addition, for at least one heating element housing device, at least one heat exchanger exchanges heat between the purified air flow and the air flow to be purified. Even when the temperature does not drop below a predetermined temperature due to heat conduction, the heat exchange efficiency can be increased by separation. In addition, the other heat exchanger exchanges heat between the outside air and the purified air flow or between the outside air and the air flow to be purified. Even if the temperature of the purified air in the heating element housing device is high, the outside air temperature Can be forcibly lowered. From the reverse viewpoint, even if the temperature of the purified air in the heating element housing device is low, it can be forcibly raised to the outside temperature.

Since the air purification apparatus according to the invention of claim 5 is a mixture of metal silicon powder 5 to 10 wt% and iron powder 0 to 10 wt% as the sintering raw material mixture, the air purification apparatus of claims 1 to 4 In addition to the effects corresponding to any one of them, 5 to 15 wt% of the metal silicon powder and 0 to 5 wt% of the iron powder are blended, so that the energization stability can be ensured. Moreover, since iron powder functions as a resistor when oxidized, it can be used for resistance value control. You can control whether or not.
In particular, a mixture of silicon powder (semiconductor) 5 to 10 wt% and iron powder 0 to 10 wt% can easily set the Curie point temperature.

  The platinum group catalyst of the air purifying apparatus according to the invention of claim 6 is palladium, an alloy composed of a combination containing palladium such as palladium and palladium, palladium and silver, palladium and ruthenium, palladium and rhodium, or palladium. In addition to the effects corresponding to any one of claims 1 to 5, the alloy includes a single palladium or a combination containing palladium, or palladium. Due to the two-layer structure, the platinum group catalyst contains palladium, which is dissolved in an inorganic solvent and / or an organic solvent, dipped, applied, and dried, so that it is easy to handle and easy to manufacture.

  The platinum group catalyst of the air purifying apparatus according to the invention of claim 7 is ethanol 40-50 wt%, normal propyl alcohol 5-10 wt%, palladium 5 wt% or less, methanol 0.5-3 wt%, dispersion resin 0.5 wt%. Hereinafter, since the remainder is blended as water, in addition to the effects corresponding to any one of claims 1 to 5, the palladium of the catalyst is ethanol, normal propyl alcohol, methanol, water as a solvent. Therefore, it can be easily supported by coating and impregnation, and the drying speed can be increased.

FIG. 1 is a flowchart showing a method for manufacturing a porous heating element with a catalytic function used in an air purification apparatus according to an embodiment of the present invention. FIG. 2 shows a porous heating element with a catalytic function used in the air purifying apparatus according to the embodiment of the present invention. (A) is a perspective view of a cylindrical porous resistance molded body, and (b) is a cylinder. (C) is a perspective view of a cylindrical porous resistance molded body provided with spray electrodes, and (d) is a perspective view of a porous heating element with a catalytic function. is there. FIG. 3 shows a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention. (A) is a perspective view of a rectangular tubular porous resistance molded body, and (b) is a perspective view. Square cylindrical metal-sprayed porous resistance molded body perspective view, (c) is a square cylindrical porous resistance molded body with a spray electrode disposed thereon, and (d) is a porous heating element with a catalytic function. It is a perspective view. FIG. 4 is a characteristic diagram of a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention, (a) is a temperature-resistance characteristic diagram, (b) is a time-current characteristic diagram, c) is a time-temperature characteristic diagram. FIG. 5 is a schematic perspective view of the overall configuration of an air purification apparatus with a blower using a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention. FIG. 6 is a schematic explanatory diagram of an air purification device showing a combination of a heat generator housing device containing a porous heating element with a catalytic function and a heat exchanger used in the air purification device according to the embodiment of the present invention. . FIG. 7 is an explanatory view showing another arrangement example of the porous heating element with a catalyst function used in the air purification device according to the embodiment of the present invention. FIG. 8 shows a porous heating element bundle with a catalytic function used in the air purifying apparatus according to Embodiment 1 of the present invention, (a) is a perspective view in which cylindrical porous resistance molded bodies are continuously connected; (B) is a perspective view of a cylindrical metal-sprayed porous resistance molded body bundle, (c) is a perspective view of a cylindrical porous resistance molded body continuously connected to form a square column, and (d) is a cylindrical shape. FIG. 3 is a perspective view of a porous heating element bundle with a catalyst function in which a rectangular column is formed with a cylindrical porous resistance molded body. FIG. 9 is an explanatory diagram showing an arrangement relationship of the porous heating element with a catalyst function used in the air purification device according to the embodiment of the present invention. FIG. 10 is a cross-sectional view showing the air moving path of the porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention. FIG. 11 is a perspective view showing the overall structure of the heat exchanger used in the air purification apparatus according to the embodiment of the present invention. 12A and 12B are heat exchangers used in the air purification apparatus according to the embodiment of the present invention. FIG. 12A is a plan view and FIG. 12B is a front view thereof. 13A and 13B are heat exchangers used in the air purification apparatus according to the embodiment of the present invention. FIG. 13A is a cross-sectional view taken along the cutting line AA in FIG. 12, and FIG. 13B is a cutting line BB in FIG. It is sectional drawing by. FIG. 14 is an explanatory diagram of the inside of the heat exchanger used in the air purification device according to the embodiment of the present invention. FIG. 15: is the perspective view (a) and sectional drawing (b) by the cutting line CC of the partition plate of the heat exchanger used with the air purifying apparatus concerning embodiment of this invention. FIG. 16 is a characteristic diagram of an ammonia deodorization test of a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention. FIG. 17 is a characteristic diagram of a hydrogen sulfide gas deodorization test using a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention. FIG. 18 is a characteristic diagram of an ethylene gas deodorization test of an air purification device using a porous heating element with a catalyst function according to an embodiment of the present invention. FIG. 19 is a characteristic diagram of an acetic acid gas deodorization test of an air purification apparatus using a porous heating element with a catalyst function according to an embodiment of the present invention. FIG. 20 is an explanatory perspective view showing a porous heating element bundle with a catalyst function of the porous heating element with a catalyst function used in the air purifying apparatus according to the embodiment of the present invention and an air moving path. FIG. 21 is an explanatory perspective view showing a housing of a porous heating element with a catalyst function used in the air purifying apparatus according to the embodiment of the present invention and an air moving path. FIG. 22 is a cross-sectional view showing the boundary plate of the porous heating element with a catalytic function used in the air purifying apparatus according to the embodiment of the present invention and the air moving path. FIG. 23A is a plan view, and FIG. 23B is a front view, showing a partition wall and a moving path of air of a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention. 24 is a cross-sectional view showing a boundary plate and a partition wall of a porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention, and (a) is a cross-sectional view taken along the cutting line AA of FIG. (B) is sectional drawing by the cutting line BB of FIG. FIG. 25 is a cross-sectional view showing a positional relationship among a boundary plate, a partition wall, and a porous heating element bundle with catalytic function of the porous heating element with catalytic function used in the air purification apparatus according to the embodiment of the present invention. FIG. 26 is a part development perspective view showing parts development of the porous heating element with a catalytic function used in the air purifying apparatus according to the embodiment of the present invention. FIG. 27 is an overall schematic perspective view of another example of the air purification apparatus with a blower using the porous heating element with a catalytic function used in the air purification apparatus according to the embodiment of the present invention.

Hereinafter, a porous heating element with a catalyst function according to an embodiment of the present invention will be described with reference to the drawings.
In the embodiments, the same symbols and the same reference numerals mean the same or corresponding functional parts of the embodiments, and the same symbols and the same reference numerals with the embodiments mean the functional parts common to the embodiments. Therefore, the detailed description which overlaps is abbreviate | omitted here.

[Embodiment]
First, a porous heating element with a catalytic function used in an air purification device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.
Positive porous pre-sintered compacts 10A and 20A constituting a porous heating element with a catalytic function used in the air purification apparatus according to the present embodiment are aluminum powder 2, graphite powder 3 as carbon powder, It is produced using a ceramic raw material powder 4 which is a clay powder for ceramics as an inorganic oxide material, and a sintering raw material mixture containing wood powder 5, water and / or a binder 6 as required. is there. Here, the wood powder 5 is useful for strengthening the heat shock after firing. Further, it is possible to omit the water and / or the binder 6 and fire it as a solidified powder. Wood flour turns into cocoons when fired, and this cocoon is presumed to be useful for strengthening heat shock. The wood powder 5 can be substituted by the graphite powder 3 because of its properties, and its components can be omitted.

As shown in the flowchart of FIG. 1, in the pre-sintered molded bodies 10 </ b> A and 20 </ b> A of the porous heating element with a catalytic function used in the air purification apparatus according to the present embodiment, first, the sintering raw material of step S <b> 1 is used. In the mixing process, the aluminum powder 2, the graphite powder 3, the square clay powder 4, the wood powder 5, water and / or the binder 6 are mixed to obtain a sintered raw material mixture 10 to be molded in the molding process of step S2. At this time, the binder applied a 30% aqueous solution of polyvinyl alcohol (PVA) to water and / or the binder 6 in a weight ratio of 15 to 25 wt%. Furthermore, 5-10 wt% of metal silicon powder and 0-10 wt% of iron powder were mixed as a resistance adjusting agent 7 in PVA in 30% aqueous solution.
Of course, when the sintered raw material mixture 10 is hardened only by powder, water becomes 0 wt%, and the resistance adjuster 7 is a component that does not mix metal silicon powder and iron powder.

  Here, as the aluminum powder 2, a commercially available aluminum powder can be used, and such aluminum powders are Minalco Co., Ltd., Nippon Light Metal Co., Ltd., Toyo Aluminum Co., Ltd., Daiwa Metal Powder Co., Ltd. Etc. are on sale. Further, the aluminum powder 2 can be used not only with 100% aluminum but also with a slight amount of impurities such as inorganic substances or recycled aluminum, and further contains a slight amount of metal such as iron or copper. It is also possible to use aluminum alloy powder or the like.

  The aluminum powder 2 preferably has a median diameter measured by a laser diffraction / scattering method in the range of 30 μm to 75 μm and a particle diameter measured by a sieve test method of less than 150 μm. That is, the filling property is improved by combining small particles and large particles. Further, if the median diameter of the aluminum powder 2 is less than 30 μm, the aluminum powder 2 may be easily melted at a low temperature during the firing process and may be ejected to the surface, while the median diameter of the aluminum powder 2 is 75 μm. When exceeding, the part which is not covered with the graphite powder 3 will increase, and it may become easy to produce the sintering defect by which the aluminum fuse | melted in the baking process ejects on the surface. Even when the particle diameter measured by the sieving test method of the aluminum powder 2 is 150 μm or more, the portion not covered with the graphite powder 3 increases, and as a result, the sintered aluminum in which molten aluminum is ejected to the surface during the firing process. Is likely to occur. More preferably, the median diameter of the aluminum powder 2 measured by the laser diffraction / scattering method is in the range of 35 μm to 65 μm, and the particle diameter measured by the sieve test method is less than 100 μm.

The graphite powder 3 as the carbon powder does not melt at a temperature lower than the melting point of the aluminum powder 2, and a commercially available graphite powder can be used as the graphite powder 3. And such graphite powder is marketed by Nishimura Graphite Co., Ltd., Nippon Graphite Industry Co., Ltd., Ito Graphite Industry Co., Ltd., Chuetsu Graphite Industry Co., Ltd., etc. Commercial graphite powder includes natural graphite such as scaly graphite and earthy graphite, and artificial graphite such as long columnar granulated graphite obtained by granulating scaly natural graphite powder into a long columnar shape. It is preferable to use natural scaly graphite, which is considered high. By using scaly graphite, it is easy to get entangled and adhered to the aluminum powder 2, and it is possible to effectively suppress the sintering failure in which aluminum is ejected to the surface due to the melting of the aluminum powder 2.

The graphite powder 3 preferably has a median diameter measured by a laser diffraction / scattering method in the range of 60 μm to 90 μm and a particle diameter measured by a sieve test method of less than 200 μm. This is also because the filling property is improved by combining the small-diameter particles and the large-diameter particles.
Further, if the median diameter of the graphite powder 3 is less than 60 μm, the graphite powder 3 is liable to be liquefied during the firing process, and a sintering failure in which aluminum is ejected to the surface is likely to occur. On the other hand, when the median diameter of the graphite powder 3 exceeds 90 μm, the graphite powder 3 becomes difficult to be uniformly dispersed and mixed, and the portion of the aluminum powder 2 that is not covered with the graphite powder 3 increases, Sintering defects in which aluminum is ejected to the surface during the firing process tend to occur. Even when the particle diameter of the graphite powder 3 measured by the sieving test method is 200 μm or more, the portion of the aluminum powder 2 that is not covered with the graphite powder 3 increases, resulting in poor sintering in which aluminum is ejected to the surface during the firing process. It becomes easy. More preferably, the median diameter of the graphite powder 3 measured by the laser diffraction / scattering method is in the range of 70 μm to 80 μm, and the particle diameter measured by the sieve test method is less than 150 μm.

Sasame clay powder 4 as a clay powder for ceramics is made from the weathered residual clay formed by weathering and depositing granite, which has been refined and powdered by elutriation (separation of silica sand and clay), aluminum This is a clay powder containing a main component of kaolin which is Al ₂ Si ₄ 0 ₁₀ (OH) ₈ , which is a mixture of quartz, feldspar, mica and the like. In general, according to chemical analysis, the amount of aluminum oxide Al ₂ O ₃ and silicon oxide SiO ₂ is the largest, and in addition, Fe ₂ O ₃ , TiO ₂ , CaO, MgO, Na ₂ O , K ₂ O and other components are contained, but the amount of the component varies depending on the place of production, etc. Therefore, if Al ₂ O ₃ and SiO ₂ are mainly contained, other components and composition ratios are not particularly limited. Absent. As this Sasame clay powder 4, for example, a commercially available Sasame clay powder marketed by Yamas Corporation, Kyoritsu Material Co., Ltd. or the like can be used.

In addition, this square clay powder 4 has a median diameter measured by a laser diffraction / scattering method in the range of 5 μm to 30 μm, and a particle diameter measured by a sieve test method is less than 100 μm. This is because the packing property is improved by combining the diameter particles.
Further, it is costly to obtain a fine powder having a median diameter of less than 5 μm, and when the median diameter of the mesh clay powder 4 is less than 5 μm, Changes in the components of the mesh clay powder 4 are likely to occur, and there is a possibility that performances such as stable strength and energization exothermicity cannot be secured in the porous resistance molded bodies 10C and 20C described later. On the other hand, if the median diameter of the Sasame clay powder 4 exceeds 30 μm, the Sasame clay powder 4 is difficult to be uniformly dispersed and mixed, resulting in an uneven distribution, or changes in the components of the Sasame clay powder 4 due to heat. As a result, there is a possibility that performances such as stable strength and energization exothermicity may not be ensured in the porous resistance molded bodies 10C and 20C.
Similarly, even when the particle size measured by the sieve test method of the square mesh powder 4 is 100 μm or more, the uniform clay powder 4 is hardly uniformly dispersed and mixed, resulting in uneven distribution, Changes in the composition of the eye clay powder 4 are likely to occur. As a result, there is a possibility that performance such as stable strength and energization exothermicity cannot be secured in the porous resistance molded bodies 10C and 20C.
More preferably, the median diameter of the square clay powder 4 measured by the laser diffraction / scattering method is in the range of 10 μm to 20 μm, and the particle diameter measured by the sieve test method is less than 70 μm.

The wood powder 5 is obtained by finely pulverizing wood chips such as large sawdust, thinned wood chips, small-diameter wood, lumber mill ends, and bark with a pulverizer, but is preferably a whisker. By using the whisker-like wood powder 5, raw materials such as aluminum powder 2, graphite powder 3 and glazed clay powder 4 are entangled in the whisker-like gaps of the whisker. What is generated by applying pressure in the molding process described later is strong and dense. And the porous resistance moldings 10C and 20C obtained by sintering this shaped sintering raw material mixture have very high strength.

The wood powder 5 preferably has a median diameter measured by a laser diffraction / scattering method in the range of 80 μm to 120 μm and a particle diameter by a sieve test method of less than 200 μm. This is because the filling property is improved by the combination of the small diameter particles and the large diameter particles. In addition, it is costly to obtain a fine powder having a median diameter of less than 80 μm of wood powder 5. On the other hand, if the median diameter of wood powder 5 exceeds 120 μm, the wood powder 5 is uniformly dispersed and mixed Therefore, there is a possibility that the distribution of voids due to burning is biased and stable strength is not ensured in the pre-sintered molded bodies 10A and 20A. Further, even when the particle diameter of the wood powder 5 by the sieve test method is 200 μm or more, the wood powder 5 is difficult to be uniformly dispersed and mixed, and the distribution of voids due to burning is biased. Stable strength is not ensured. More preferably, the median diameter of the wood powder 5 measured by the laser diffraction / scattering method is in the range of 50 μm to 100 μm, and the particle diameter measured by the sieve test method is less than 150 μm.

In order to economically obtain the wood powder 5 having a particle diameter of less than 200 μm, the wood chips such as thinned wood, small diameter wood, bark, sawn timber, and large sawdust are dried to a water content of 20 parts by weight or less and then pulverized. There is a need. This is because by drying the wood chips to a water content of 20 parts by weight or less, the pulverized product can be prevented from becoming a slurry and hindering fine pulverization. Further, in order to finely pulverize the dried wood chips to obtain a wood powder 5 having a particle diameter of less than 200 μm, it is preferable to use a fine pulverizer having a peripheral speed in the range of 50 m / sec to 80 m / sec. An example of such a fine pulverizer is a micron colloid mill manufactured by Kawamoto Tekko Co., Ltd.
Here, conifers such as cedar (Japanese cedar) and Japanese cypress (Japanese cypress) are widely distributed in Japan and are used in large quantities as building materials, etc., so it is easy to obtain large amounts of sawdust, thinned wood and bark. Can do. Furthermore, the fine structure of coniferous trees is whisker-like, and can be easily pulverized into wood powder 5. Therefore, in terms of raw material collection and national land conservation, it is preferable to use coniferous large sawdust or coniferous thinning chips or coniferous bark as large sawdust and thinned wood chips and bark.

In the air purification apparatus of the present embodiment, the amount of the raw material that does not move due to the difference in specific gravity (amount that does not cause gravity sedimentation) in the aluminum powder 2, the graphite powder 3, the glazed clay powder 4, and the wood powder 5. By mixing the water and / or the binder 6, the clay mesh powder 4 is a clay mineral substance, which functions advantageously to ensure moldability or shape retention, and the raw materials are bonded to each other. The sintered raw material mixture 10 can be obtained in a state that does not collapse even if it is held by hand. The sintered raw material mixture 10 thus obtained is in a state in which the graphite powder 3 is attached to the surfaces of the aluminum powder 2 and the wood powder 5.

  As the binder, 15 to 25 wt% of a 30% aqueous solution of polyvinyl alcohol (PVA) was used as water and / or binder 6. Moreover, 5-10 wt% of metal silicon powder and 0-10 wt% of iron powder were mixed and used for the binder for adjusting the resistance value of the porous pre-sintered compacts 10A, 20A. Iron powder and metal silicon powder increase or decrease depending on the management status of aluminum powder 2, wood powder 5, and graphite powder 3. Moreover, it changes also with the component of Sasame clay powder 4 as clay powder for ceramics. Iron powder is manufactured by Höganäs Japan, with a median diameter in the range of 20 μm to 180 μm. Metallic silicon powder (exactly semiconductor) is manufactured by Kinsei Tech Co., Ltd., with a median diameter in the range of 75 μm or less. did.

In the air purifying apparatus of the present embodiment, a precision dispersion mixer is used for mixing these raw materials, and the aluminum powder 2, graphite powder 3, glazed clay powder 4 and wood powder 5, and resistance adjuster 7 are uniform. Thus, a sintered raw material mixture 10 is obtained. In addition, as the precision dispersion mixer, it is preferable to use a high-speed stirring disperser within a peripheral speed range of 5 μm / second to 80 m / second, more preferably within a peripheral speed range of 20 m / second to 30 m / second. As such a high-speed stirring disperser, for example, a horizontal turbulizer (registered trademark) manufactured by Hosokawa Micron Corporation can be used.

Further, in the present embodiment, since the raw clay powder 4 is used as a raw material, the raw materials are easily bonded together by mixing a small amount of water (6). By simply pressurizing at room temperature, the pre-sintered molded bodies 10A and 20A can be molded and strengthened. However, when the present invention is carried out, an organic binder or an inorganic binder is used for bonding raw materials. It is also possible to use, and it is also possible to use water and a binder together.
Here, as the “organic binder”, for example, synthetic resin, starch, synthetic glue, sugar and the like can be used. Synthetic resins include thermoplastic resins and thermosetting resins, and polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, acrylic resins, polyurethane resins, etc. should be used as thermoplastic resins. As the thermosetting resin, phenol resin, epoxy resin, polyol resin, isocyanate resin, melamine resin, urea resin, unsaturated polyester resin, alkyd resin, urethane prepolymer and the like can be used. The binder of this embodiment used a 30% aqueous solution of polyvinyl alcohol (PVA). Of these, the polyol resin and the isocyanate resin react at room temperature to form a strong bond. In particular, the isocyanate resin reacts with the hydroxyl group (—OH) in the wood powder 5 or the like to form a strong urethane bond. Therefore, the molded body before sintering 10A and 20A is very strong and dense.

Inorganic binders include hydraulic materials such as cement, clay such as bentonite, which is a raw material for porcelain (tile) and earthenware, ρ-alumina (Al ₂ O ₃ · nH ₂ O: n≈0.5), sodium silicate Water-soluble alkali silicic acid, silica binder manufactured by Japan Nanocoat Co., Ltd., general-purpose binder FJ294, which is a silica binder manufactured by Grandex Co., Ltd., and the like can be used.
Note that the organic binder is burned off in the heating process to form voids, and the inorganic binder is baked without being burned out.

Furthermore, in the case of carrying out the present invention, the aluminum powder 2, the graphite powder 3, the square clay powder 4 and the wood powder 5 are added with water and / or a binder 6 (water, binder as required), a resistance adjusting agent 7 Is filled into a mold as a slurry-like sintered raw material mixture 10 and hardened, and then subjected to the molding process of step S2. In addition, as in the production of ceramics and porcelain (tile), the sintered raw material mixture 10 can be dried by a spray dryer and then subjected to the molding process in step S2. Further, the powdered sintering raw material mixture 10 can be solidified without using water and / or the binder 6. In any case, the means for adhering water and / or raw materials and the type of binder are not particularly limited as long as a solidified state can be produced so that the shape can be maintained in the firing process described later.

Next, in the air purifying apparatus of the present embodiment, the sintering raw material mixture 10 is pressed at room temperature in the molding process of step S2 and is formed into a solid and solid compact before sintering 10A, 20A. Become.
Here, in the molding step of Step S2, press molding in which the sintering raw material mixture 10 is put into a press molding die and molded by pressing at a predetermined pressure, and the pre-sintered molded bodies 10A and 20A are used as a pressure-resistant mold. It is possible to perform extrusion molding or the like in which extrusion is performed at a predetermined pressure.

Incidentally, in the present embodiment, because the raw clay powder 4 is used as a raw material, a small amount of water and / or binder 6 can be mixed or eliminated as described above, so that the raw materials can be easily bonded to each other. It will be in a state of being organized. For this reason, it can shape | mold by low pressure by pressurization at normal temperature. Therefore, it is not always necessary to use a press device with high pressure or heating equipment, and the cost can be reduced.
Specifically, if the sintering raw material mixture 10 obtained by mixing water and / or binder 6 is press-molded, the pressing pressure is preferably in the range of ^{10kg / cm 2 ~200kg / cm 2} . If the pressure of the press molding is less than 10 kg / cm ² , the sintered raw material mixture 10 is not sufficiently compressed, so that the strength of the obtained pre-sintered molded bodies 10A and 20A becomes weak and may be damaged in the firing process described later. There is. On the other hand, when the pressure of press molding exceeds 200 kg / cm ² , the pressure is applied to the sintering raw material mixture 10 so as to have a high density, and the resistance values of the pre-sintered compacts 10A and 20A become small, and step S3 There is a possibility that the energization exothermic property of the porous molded resistors 10B and 20B after firing may be impaired. Moreover, there is a possibility of sintering failure. More preferably, the pressure of press molding is in the range of ^{50kg / cm 2 ~150kg / cm 2} . In particular, as the amount of moisture increases, molding at a lower pressure becomes possible.

  As described above, in the present embodiment, molding can be performed by pressurization at room temperature, and uniform heating from the outside is not necessary. Therefore, in the case of press molding, the thick pre-sintered compacts 10A and 20A (for example, It is also possible to obtain a thickness of about 20 mm with a 150-ton press. Furthermore, since a heating mechanism is unnecessary, it is possible to obtain a large-area pre-sintered molded body 10A, 20A (for example, 1000 mm × 2000 mm) by simplifying the structure of the press molding machine and the mold. In addition, as a press molding machine at this time, the powder molding press machine of 150 tons or more can be used, for example. According to this press machine, since a mechanism capable of degassing is provided during molding, a high-strength one can be stably obtained by molding. Of course, as will be described later, for example, a mold having irregularities, a mold frame having curved portions, or the like is used, and irregularities are formed on the design surface of the sintering raw material mixture 10 by molding. 20A can be formed into a desired shape.

  On the other hand, in the case of extrusion molding, the sintered raw material mixture 10 can be formed into a complicated shape such as a curved cylindrical shape or rod shape. In particular, since the sintering raw material mixture 10 formed by mixing water and / or the binder 6 has good moldability, the cross-sectional circle, the cross-sectional oval, the cross-sectional oval, the cross-sectional triangle, the cross-sectional square, and the hexagonal cross-section are formed by extrusion molding. It is also possible to form into an extremely complicated shape such as (honeycomb shape). Moreover, the size of the cross-sectional shape of the through-holes 11 and 21 is also an arbitrary size, and a plurality of sizes can be combined. Moreover, the number can also be made into arbitrary numbers, and arbitrary shapes can also be selected also for the whole external shape. Thus, the extrusion-molded pre-sintered molded body 10A (see FIG. 2) and the injection-molded pre-sintered molded body 20A (see FIG. 3) according to the present embodiment shown in FIGS. ) Is obtained.

In carrying out the present invention, of course, the sintered raw material mixture 10 can be formed by heating and pressing. In particular, in the present invention, mineral powder such as Sasame clay powder 4 is used, and this functions advantageously to ensure moldability or shape retention. Molding is possible without mixing. Incidentally, the press molding pressure when heating and pressing without mixing water and binder is preferably in the range of ^{50kg / cm 2 ~300kg / cm 2} . If the pressure of the press molding is less than 50 kg / cm ² , the strength of the sintered raw material mixture 10 is not sufficiently compressed when water or a binder is not mixed, and the strength may be weakened and may be damaged in the firing process described later. . On the other hand, when the pressure of the press molding exceeds 300 kg / cm ² , the sintering raw material mixture 10 is excessively pressurized, resulting in a high density, and the resistance values of the obtained pre-sintered molded bodies 10A and 20A are reduced. Even if it does, the energization exothermic property of molding resistor 10B, 20B may be spoiled. More preferably, in the range of ^{100kg / cm 2 ~200kg / cm 2} . However, depending on the resistance value and the composite component, there may be used outside the range of ^{100kg / cm 2 ~200kg / cm 2} .

Subsequently, the sintering raw material mixture 10 formed in step S2 is sintered in a temperature controlled electric furnace within a range of 900 ° C. to 1200 ° C. in the sintering process of step S3.
Here, the sintering temperature is in the range of 900 ° C. to 1200 ° C. As a result of repeated experiments by the present inventors, when the temperature is lower than 900 ° C., a powder is obtained without sufficient firing. Since it was confirmed that the sintering was poor, the lower limit value of the sintering temperature was set to 900 ° C., and, on the other hand, when it exceeded 1200 ° C., the obtained molded resistors 10B and 20B had energization heat generation. Since it was found that there was no upper limit, the upper limit of the sintering temperature was set to 1200 ° C.
The temperature raising program for the sintering process is determined by experiments in advance according to the type, particle size, blending amount of each raw material, the resistance value required for the porous heating elements 100 and 200 with a catalytic function described later, the heating temperature, and the like. The optimum value is set.
Then, by sintering within the range of 900 ° C. to 1200 ° C. in this way, the molded resistors 10B and 20B having positive characteristics are obtained. The positive molded resistors 10B and 20B thus obtained have a resistance temperature characteristic that the resistance is low at room temperature, and the resistance rapidly increases when a predetermined temperature is reached. To do. In particular, since the molded resistors 10B and 20B dissipate heat over the entire surface and are porous, the surface area is increased.

After firing the positive molded resistors 10B and 20B in step S3, the electrode films 13, 14, 23, and 24 are formed by spraying metal (implemented with aluminum) at desired positions of the molded resistors 10B and 20B in step S4. Mold. Since the molding resistors 10B and 20B are porous, the electrode films 13, 14, 23, and 24 are more firmly bonded to the molding resistors 10B and 20B. The electrode films 13, 14, 23, 24 of the molded resistors 10B, 20B are molded on the end side in the length direction of the molded resistors 10B, 20B. Thereafter, in step S5, the plate-like or linear copper electrode leads 15 and 25 are superimposed on the electrode films 13 and 23, and the copper electrode leads 15 and 25 are superimposed on the electrode films 13 and 23, followed by thermal spraying again, thereby the electrode films 13 and 23. The copper electrode leads 15 and 25 and the electrode films 14 and 24 and the copper electrode leads 16 and 26 are fixed together.
Here, since the opposing surfaces of the electrode films 13 and 23 and the copper electrode leads 15 and 25 and the opposing surfaces of the electrode films 14 and 24 and the copper electrode leads 16 and 26 cannot be joined, they face the electrode films 13, 14, 23, and 24. It is desirable to form holes in the copper electrode leads 15, 16, 25, 26 to be formed, or to form irregularities in the shape of a leaf vein (rear coastline) on the outer peripheral silhouette line to increase the bonding force between them.
Further, the attachment of the copper electrode leads 15, 16, 25, 26 to the electrode films 13, 14, 23, 24 of the present embodiment is accommodated in the heating element accommodating device 300 as the porous heating elements 100, 200 with a catalytic function. Depending on the form, the copper electrode leads 15, 16, 25, 26 and the electrode terminals 17, 18, 27, 28 may be omitted. That is, the electrode films 13 and 23 on both sides provided on the porous resistance molded bodies 10C and 20C are formed by metal spraying, and at least the electrode films 13 and 23 formed by metal spraying are necessary. This means that the copper electrode leads 15, 16, 25, 26 and the electrode terminals 17, 18, 27, 28 can be omitted or connected.

Next, the entire porous resistance molded body 10C, 20C is immersed in a platinum group catalyst solution dissolved in an inorganic solvent such as water and / or an organic solvent such as alcohol, acetone, hexane, etc., and the porous resistance molded body 10C. , 20C is supported on the outer surface of the platinum group catalyst 19 and dried to fix the platinum group catalyst 19 to the surface of the porous portion.
Here, the platinum group catalyst 19 is an element located in the fifth and sixth periods, the eighth, ninth, and tenth groups in the periodic table, that is, physical properties and chemical properties are similar to each other. Ruthenium, rhodium, palladium, osmium, iridium, platinum and the like, and here, a catalyst selected from them, which is dissolved in an inorganic solvent and / or an organic solvent. The platinum group catalyst 19 that can be used in this embodiment is a single alloy or palladium made of a combination containing palladium Pd and platinum Pt, palladium Pd and silver Ag, palladium Pd and ruthenium Ru, palladium Pd and rhodium Rh, and palladium. A plurality of structures including a two-layer structure or more are included.
In the present embodiment, ethanol 40 to 50 wt%, normal propyl alcohol 5 to 10 wt%, palladium 5 wt% or less, methanol 0.5 to 3 wt%, and dispersion resin 0.5 wt% with respect to porous resistance molded bodies 10C and 20C. Hereafter, the remainder is mix | blended as water and the whole is immersed there.

FIG. 2A shows a sintering raw material mixture 10A having a cylindrical outer shape. As shown in FIGS. 2B and 2C, both end portions are sprayed to form an electrode film 13, a copper electrode lead 15, and an electrode film 14. And the copper electrode lead 16 are integrally provided, and the electrode terminals 17 and 18 are connected to the copper electrode leads 15 and 16. Then, as shown in FIG. 2D, a platinum group catalyst 19 is attached around the cylindrical molded resistor 10B to obtain a porous heating element 100 with a catalytic function.
Similarly, FIG. 3 (a) shows a sintering raw material mixture 20A having an outer shape of a square cylinder, and as shown in FIGS. The electrode film 24 and the copper electrode lead 26 are integrally provided, and further, as shown in FIG. 3 (d), a platinum group catalyst 29 is adhered around the square columnar molded resistor 20B, so that the porous porous structure having a catalytic function A heating element 200 is obtained.
In addition, with respect to the length direction of the columnar molded resistor 10B shown in FIG. 2, the electrode films 13 and 14 are provided on the opposite end face, and the end portions are alternately and instantaneously immersed in a molten aluminum bath. You can also. The current path of the molding resistor 10B at this time is determined by the thickness of the through hole 11.

As shown in FIGS. 2 and 3, the porous resistance molded bodies 10C and 20C have a cylindrical shape or a rectangular cylindrical shape by internal through holes 11 and 21, and are molded by metal spraying at both ends thereof. It consists of a pair of electrode films 13, 14, 23, 24. The pair of electrode films 13, 14, 23, 24 was formed by molding the sintered raw material mixture 10, and then forming one or more through-holes 11 using a mold in step S <b> 2 of the molding process. After firing the molded resistors 10B, 20B, the electrode films 13, 14, 23, 24, the copper electrode leads 15, 16, 25, 26, and the electrode terminals 17, 18, 27, 28 are formed by thermal spraying in steps S4 and S5. Molded. The electrode films 13, 14, 23, and 24 in this embodiment are aluminum films. Since the metal spraying is performed after the sintering process, it is not melted by being exposed to a high temperature, and therefore any metal can be used for the electrode films 13, 14, 23, and 24.
In the experiments conducted by the inventors, the copper electrode leads 15, 16, 25, 26 were made of aluminum, copper, brass, stainless steel or the like selected as a low resistance material.

  In the porous resistance molded bodies 10C and 20C used in the air purification apparatus according to the present embodiment, the pair of electrode films 13, 14, 23, and 24 are molded by metal spraying. However, when the present invention is carried out, May be formed by embedding electrodes (not shown) in the pre-sintered molded bodies 10A and 20A themselves, that is, in the pre-sintered molded bodies 10A and 20A, or by attaching electrodes to end surfaces, or before sintering. It is good also as a structure which presses strongly the molded object 10A, 20A. In any case, it is desirable that the terminal can be energized with a low contact resistance.

As shown in FIGS. 2 and 3, the pair of electrode films 13, 14, 23, 24 of the porous resistance molded bodies 10C, 20C of the porous heating elements 100, 200 with a catalyst function are formed into the molded resistor 10B, It can also be formed on both end sides in the length direction of 20B, and can also be formed on the opposing surface side in the direction perpendicular to the length direction, although not shown.
In particular, the pair of electrode films 13, 14, 23, 24 of the molded resistors 10B, 20B are provided on the molded resistors 10B, 20B by metal spraying, and the sprayed electrode films 13, 14, 23 are formed. , 24 and the copper electrode leads 15, 16, 25, 26 are integrally provided. After being provided on the molding resistors 10B, 20B by metal spraying, the electrode terminals 17, 18, 27, 28 can also be molded.
When the electrode films 13, 14, 23, 24 of the porous resistance molded bodies 10C, 20C of the porous heating elements 100, 200 with a catalyst function are disposed, the molded films are formed to improve finishing accuracy and mounting properties. The surfaces of the resistors 10B and 20B, in particular, the surfaces on which the electrode films 13, 14, 23, and 24 are formed can be polished to increase the accuracy. Even after mechanical polishing, the resistance value hardly changed.

According to the experimental study by the present inventors, the following characteristics have been confirmed for the porous heating elements 100 and 200 with a catalytic function used in the air purification apparatus according to the above embodiment.
It was confirmed that the resistance value of the porous heating elements 100 and 200 with a catalytic function varies depending on the particle shape, blending amount and type of raw material, and the pressure during molding. The reason seems to be that the density of the porous resistance molded bodies 10C and 20C changes depending on the particle shape, blending amount and type of the raw material and the pressure during molding. Specifically, for example, when coarse particles are used as the raw material, the resistance value becomes larger than when fine particles are used, and the resistance value increases as the press pressure at the time of molding increases.

  Therefore, according to the porous heating element with catalytic function 100, 200 used in the air purification apparatus according to the present embodiment, the porous resistance can be adjusted by adjusting the particle shape, blending amount and type of the raw material and the pressure during molding. By changing the density of the molded bodies 10C and 20C, it is possible to control the resistance values of the porous resistance molded bodies 10C and 20C. Incidentally, it has been confirmed by experimental studies by the present inventors that the resistance value of the porous resistance molded bodies 10C and 20C decreases when the density of the porous resistance molded bodies 10C and 20C is increased. Therefore, the heat generation only at a desired position to be heated can be increased.

  In particular, according to the porous heating elements 100 and 200 with a catalytic function used in the air purification apparatus according to the present embodiment, the wood powder 5 is used as a raw material, and this wood powder 5 is burned off during the firing process. As a result, the portion becomes a void, which greatly affects the denseness of the porous resistance molded bodies 10C and 20C. For this reason, the resistance value of the porous resistance molded bodies 10C and 20C can be easily controlled by adjusting the amount of the wood powder 5 added.

In addition, the resistance values of the porous resistance molded bodies 10C and 20C change by variously adjusting the sintering temperature in the range of 900 ° C. to 1200 ° C. of the sintering temperature by the inventors' experimental research. It has been found. This seems to be because the sintering density (the density of particles in the firing process) changes depending on the sintering temperature. Therefore, it is possible to control the resistance values of the porous resistance molded bodies 10C and 20C also by adjusting the sintering temperature.
Note that the porous heating elements 100 and 200 with a catalyst function change in resistance value or in accordance with the amount of energization depending on their shape. The resistance value as the characteristic heating element can be controlled.

  Further, as described above, according to the porous heating elements 100 and 200 with a catalytic function used in the air purifying apparatus according to the present embodiment, the resistance values of the porous resistance molded bodies 10C and 20C are the density, that is, Since it is influenced by the compression pressure, the resistance distribution can be controlled in the porous resistance molded bodies 10C and 20C by adjusting the density distribution when the sintered raw material mixture 10 is molded. That is, different heat generation temperatures can be set for the molded resistors 10B and 20B, and specific portions of the porous resistance molded bodies 10C and 20C can be heated to a specific temperature.

Moreover, what presses the sintering raw material mixture 10 using the metal mold | die which has a curve part in the case of press molding can obtain what changed the density largely in the curve part. Therefore, the resistance values of the molded resistor bodies 10B and 20B formed by sintering this change greatly at the curved portion, and the heat generation temperature due to energization of the porous resistance molded bodies 10C and 20C varies greatly depending on the part.
Then, during press molding, the press mold is filled by changing the filling rate of the sintering raw material mixture 10, and press molding is performed, and the thickness of the sintering raw material mixture 10 changes depending on the part. Since the density changes due to the difference in filling amount and thickness due to the press molding, the resistance values of the molding resistors 10B and 20B formed by sintering this also change greatly depending on the part, and the porous resistance molding is performed. The bodies 10C and 20C have greatly different heat generation temperatures depending on the part.

  Molding resistors 10B and 20B used in the air purifying apparatus according to the present embodiment are blended with aluminum powder 30 to 50 wt%, graphite powder 5 to 10 wt%, clay powder 30 to 50 wt%, and wood powder 0 to 10 wt%. The resulting mixture is kneaded by adding water in an amount of 15 to 25 wt%, molded by compression molding or extrusion molding, dried, sintered, and porous heating element 100,200 with a catalytic function. The sintered molded resistors 10B and 20B have a positive resistance-temperature characteristic in which the resistance is low at room temperature and the resistance rapidly increases as the temperature rises to a predetermined temperature.

  The porous heating elements 100 and 200 with a catalytic function used in the air purifying apparatus according to the present embodiment thus obtained are lightweight, harder than aluminum and resistant to wear. Its mechanical strength was higher than that of the molded one, and it had high mechanical strength. In particular, the porous heating element 100, 200 with catalytic function of the present embodiment is not broken even by heat shock that is sprayed with water when the porous heating element 100, 200 generates heat, and this catalytic function is described later. Even when the attached porous heating elements 100 and 200 had a thermal gradient (temperature distribution), they were not cracked during heat generation. Furthermore, it has been found that it is chemically strong such as acid.

  According to the inventors' scanning electron microscope (SEM: secondary electron image), open pores are distributed in the porous heating elements 100 and 200 with a catalytic function used in the air purification apparatus according to the present embodiment. It was found to be porous. Furthermore, the size of the voids was several μm to several tens of μm as a result of measurement with a gas adsorption type pore distribution measuring device. The size and porosity can be controlled.

In the deodorization test conducted by the inventor, the amount of power consumption is 1/5 to 1/3 of that of a conventional electric heater as compared with a deodorizing device of the same air volume of another company, and the size of the device is also about 1 It was confirmed to be / 5 to 1/3. In particular, in the porous heating element with catalytic function of the present invention, power consumption is reduced because there are limited places where the temperature rises to a specific temperature, and the contact area with the air to be purified passing through is wide. Therefore, it was possible to make the product downsized to about 1/5 to 1/3 of the products of other companies.
Therefore, it can be used to discharge odors in closed rooms to the outside, and can also be used to circulate air in rooms such as animal houses and nursing homes, and removes ethylene gas from the refrigerator. It was confirmed that it can be used for deodorization, removal of germs and the like. In particular, the catalyst is firmly supported by the enormous surface irregularities and fine vents of the porous resistance molded body, and harmful gases (bad odors), germs, and fungi passing through it are oxidized into water and carbon dioxide. It was confirmed that it was decomposed and disappeared.

As shown in FIG. 4 (a), the porous heating elements 100 and 200 with a catalytic function having a positive resistance temperature characteristic have a low resistance at room temperature, and when a current is applied by applying a power source, the temperature is Although it rises, the resistance value gradually decreases. However, when a certain temperature (Curie point temperature) Cu is reached, the temperature rises rapidly and the resistance suddenly increases. At this time, the temperature and the resistance value are uniquely determined. If the Curie point temperature is equal to or higher than Cu, constant power characteristics are exhibited. Therefore, in order to output a specific temperature T ° C on the horizontal axis and a temperature 2T ° C that is twice that temperature, the resistance value is obtained from the characteristics shown in FIG. If RT is calculated and the product of the resistance value RT and the current at the specific temperature T ° C. on the horizontal axis is taken, the voltage to be applied can be uniquely determined.
When a voltage is supplied from a constant voltage power source, as shown in FIG. 4B, the initial current Is tends to increase, and reaches a peak current Ip when it slightly exceeds the resistance Rcu at the Curie point temperature Cu, and then gradually. To a constant constant current It. When the constant current It becomes constant, the heat generation amount and power are constant, and the porous heating elements 100 and 200 with catalytic function at that time generate heat at a specific temperature, and the catalyst temperatures of the platinum group catalysts 19 and 29 are It is determined.

At this time, the porous heating elements 100 and 200 with the catalyst function rapidly rise to the Curie point temperature Cu, and the current overshoots to enter the control of the constant current It. However, when the elapsed time is comprehensively seen, at a temperature equal to or higher than the Curie point temperature Cu, the resistance value change with respect to the temperature change becomes large and the constant current It state is easily entered.
Therefore, when a predetermined voltage is applied exceeding the Curie point temperature Cu (peak current Ip), the specific temperature is maintained, the platinum group catalysts 19 and 29 maintain the predetermined temperature, and the reaction rate of the catalyst is increased. The reaction efficiency can be increased. A deodorizing effect was confirmed for the substance on which the platinum group catalysts 19 and 29 act at normal temperature, and furthermore, the catalyst could be deodorized at high speed by heating the catalyst. Regarding the deodorizing effect, it was confirmed that the organic substance can be completely deodorized at 300 ° C. and the inorganic substance can be completely removed at 650 ° C.

A deodorizing effect was confirmed for the substance on which the platinum group catalysts 19 and 29 act at normal temperature, and furthermore, the catalyst could be deodorized at high speed by heating the catalyst. Regarding the deodorizing effect, it was confirmed that the organic substance can be completely deodorized at 300 ° C. and the inorganic substance can be completely removed at 650 ° C. Of course, some organic substances can be removed at 300 ° C. or lower, and inorganic substances can be removed at 650 ° C. or lower.
Since the platinum group catalysts 19 and 29 are attached to the porous surface of the outer peripheral surface of the porous heating elements 100 and 200 with a catalyst function and the porous surface of the through holes 11 and 21 which are the inner peripheral surface, the platinum group catalyst Since the surface area of the catalyst 19 is large and the catalyst temperature can be applied by applying a predetermined voltage, the time affected by the catalyst is determined by the length of the porous heating elements 100 and 200 with the catalyst function and the series thereof. Depending on the length, it can be placed at any temperature for any time, and the reaction time of the catalyst can be sufficient for the reaction. In particular, the reaction time of the catalyst can be arbitrarily set by providing a plurality of stages of porous heating elements 100 and 200 with a catalyst function. Moreover, since the catalyst is supported on the porous surfaces of the porous heating elements 100 and 200 with a catalyst function, the catalyst can efficiently react.

FIG. 5 is a schematic perspective view showing an overall configuration of an air purification device using the porous heating element 100 with a catalytic function used in the air purification device according to the present embodiment, and FIG. 6 is also a porous heat generation with a catalytic function. It is a schematic explanatory drawing which shows the combination of the air purification apparatus of the heat generating body accommodating apparatus 300 and the heat exchanger 400 which accommodated the body 100. FIG.
5 and 6, the air purifying apparatus of the present embodiment accommodates a porous heating element 100 with a catalytic function and activates the catalyst at a predetermined temperature to purify air and generate heat. It consists of a heat exchanger 400 that recovers the thermal energy of the body housing device 300 when the purified air is discharged and raises the temperature of the purified air, and further supplies the purified air or sucks the purified air. It has the air blower 500 which performs.

The heating element housing apparatus 300 is a unit in which the porous heating element 100 with a catalytic function is bundled and insulated from the housing 310 by a heat-resistant insulating material 313 having a high combustion temperature such as glass wool and ceramic rock wool. It is. Specifically, the heating element housing apparatus 300 includes a housing 311 (311a, 311b, 311c, 311d, 311e, 311f) of a housing 310 formed entirely of a stainless steel plate and a plurality of partition walls 312 that allow a fluid such as air to pass in a zigzag manner. , Connecting pipes 320 and 330.
The housing 311 is formed by a box having six sides, and is formed by a back plate 311a and a front plate 311b, and an upper plate 311c and a lower plate 311d which are frames, a right plate 311e and a left plate 311f. In addition, the partition 312 is formed by molding the casing 311 vertically into six sections. By providing the partition wall 312, the air flow in the present embodiment travels a distance six times the lateral width of the casing 311 (the width of the front plate 311 b), and as a result is purified.

  Between the upper surface plate 311c or the lower surface plate 311d of the housing 311 and the partition wall 312 and between the partition walls 312 is disposed a porous heating element 100 having a catalytic function insulated by a heat-resistant insulating material 313 such as glass wool or rock wool. ing. That is, the porous heating element 100 with a catalyst function of the present embodiment is bundled and electrically connected to each other so that the electrode terminals 17 and 18 can be energized. The body 100 is insulated and has a sealing property so as not to generate an air flow around it, so that an air flow is generated only in the through hole 11 of the porous heating element 100 with a catalytic function. A plurality of the porous heat generating elements 100 with catalyst function and bundled with the heat-resistant insulating material 313 are referred to as porous heat generating element bundles 301 to 306 with catalytic function.

At this time, the space between the upper surface plate 311c or the lower surface plate 311d and the partition wall 312, the distance between the partition walls 312 and the size of the through hole 11 of the porous heating element 100 with a catalyst function are determined by the processing ability of the catalyst.
The space formed by the housing 310 and the partition wall 312 accommodates the porous heating element bundles 301 to 306 with a catalytic function, and is explained on the assumption that an air flow flows through the through holes 11 of the porous heating element 100 with a catalytic function. However, an air flow also flows in the space formed by the outer periphery between the porous heating elements 100 with a catalyst function, and the action of the catalyst can be expected. In particular, when carrying out the present invention, if the outer periphery of the porous heating element 100 with a catalyst function is an air flow passage, an efficient catalyst reaction can be obtained.

FIG. 7 illustrates a part thereof. The accommodation frame members 54 facing in parallel are made of an electrical conductor or an electrical insulator, and collect the entire porous heating element 100 with a catalytic function. The zigzag electrode plate 51 is made of a copper plate or a brass plate formed into a zigzag, and is an elastic conductor, and the flat plate 52 made of an elastic body supports one surface of the zigzag electrode plate 51 and has a housing frame. Together with the material 54, it becomes a reference. The flat plate 52 and the zigzag electrode plate 51 constitute an elastic electrode plate 53 that makes the adjacent porous heating element 100 with a catalytic function conductive.
The plate 52 or the zigzag electrode plate 51 of the elastic electrode plate 53 can be energized directly from the electrode films 13 and 14 of the porous heating element 100 with a catalyst function. Therefore, it is desirable to form the electrode films 13 and 14 thickly in the case of thermal spraying. Of course, in the present embodiment, it is not necessary to provide the copper electrode leads 15 and 16 and the electrode terminals 17 and 18 shown in FIG.

Thus, in the embodiment of FIG. 7, in order to bundle the porous heating element 100 with catalytic function, the porous heating element 100 with catalytic function and the elastic electrode plate 53 are sandwiched between the pair of housing frame members 54, and the air Is a through hole 11 of the porous heating element 100 with a catalyst function and the periphery of the porous heating element 100 with a catalyst function. Therefore, the platinum group catalyst 19 attached to the inner peripheral surface of the through-hole 11 of the porous heating element 100 with a catalytic function and the outer peripheral surface of the porous heating element 100 with a catalytic function acts on both surfaces.
In the air purifying apparatus of the present embodiment, the heat-resistant insulating material 313 such as glass wool and rock wool disposed around the pair of housing frame members 54 is formed so that the space by the bolts and nuts 55 is not formed around. After forming the porous heating element bundles 301 to 306 with a catalyst function in units, they are encased in a heat-resistant insulating material 313 such as glass wool or rock wool so as to block a necessary amount of the flow path, or used for filling the surroundings. Of course, the surroundings of the pair of housing frame members 54 may be formed by covering them with heat and insulation.

As shown in FIG. 8, in FIGS. 2 and 3, the porous heating elements 100 and 200 with a catalyst function of the present embodiment have been described as individual manufactures. 100B can also be manufactured directly.
That is, the electrode films 13, 14, 23, 24 are formed on the porous resistance molded bodies 10C, 20C with electrodes. In the present embodiment, as shown in FIG. 8 (a), the stainless steel electrode leads 15, 16, 25, 26 made of stainless steel wire are wound 1 to 3 times on the electrode films 13, 14, 23, 24 ( In the figure, it is wound once) and weaved sequentially. After the last porous resistance molded bodies 10C, 20C with electrodes were wound, only the stainless electrode leads 15, 16, 25, 26 were pulled out, and pulled out so as to bundle the porous resistance molded bodies 10C, 20C with electrodes inside. The end portion is wound around and twisted by using both end portions, and electrode terminals 17, 18, 27, and 28 comprising crimp terminals are inserted into the end portions and fixed by crimping.
In this way, as shown in FIG. 8B, a cylindrical (columnar) porous heating element bundle 100A with a catalytic function can be manufactured. The same applies to the porous heating element bundle 100B with a catalyst function.

In addition, as shown in FIG. 8A of the present embodiment, the electrode-formed porous resistance molded bodies 10C and 20C on which the electrode films 13, 14, 23, and 24 are formed are also used. On the other hand, the stainless steel electrode leads 15, 16, 25, and 26 made of a stainless steel wire are wound 1 to 3 times (1 time in the figure) and are knitted sequentially. Then, a predetermined number of porous resistance molded bodies 10C, 20C with electrodes are arranged in a line, and a predetermined number of rows of porous resistance molded bodies 10C, 20C with electrodes are sequentially stacked as shown in FIG. 6 (c). . When specific vertical, horizontal, and height dimensions are reached, only the stainless steel electrode leads 15, 16, 25, and 26 are pulled out, and the electrode-attached porous resistance molded bodies 10C and 20C are placed inside and bundled into a rectangular shape. Then, the drawn end is wound around it, twisted using both ends, and the electrode terminals 17, 18, 27, 28, which are crimp terminals, are inserted therein and fixed by crimping.
Thus, as shown in FIG. 8D, a cylindrical (columnar) porous heating element bundle 100A with a catalytic function can be manufactured. The same applies to the porous heating element bundle 100B with a catalyst function.

FIG. 9 is an explanatory view of the arrangement of the upper and lower partition walls 312 when the back of the heating element housing device 300 is viewed from the front, and FIG. 10 is a central sectional view of the heating element housing device 300.
The porous heating element bundles 301 to 306 having a catalytic function, which are bundled and insulated by a heat-resistant insulating material 313 composed of a plurality of porous heating elements 100 having a catalytic function, have the necessary number of electrode terminals 17 and 18 formed on the electrode films 13 and 14. Connected in series or in parallel as required. In this state, the heat-resistant insulating material 313 is bundled, and the porous heating element bundles 301 to 306 with a catalyst function are provided between the upper surface plate 311c or the lower surface plate 311d of the housing 311 and the partition 312 and between the partition walls 312. Is disposed. At this time, the electrode terminals 17 and 18 are electrically connected in a state not shown.

  As shown in FIG. 9 and FIG. 10, when the required number of electrode terminals 17 and 18 provided on the electrode films 13 and 14 are connected in parallel and electric power is supplied thereto, a current value corresponding to the voltage flows, and the resistance The temperature is constant at a predetermined value, and the temperature does not fluctuate. For example, when the temperature of the air is set to 300 ° C. for an organic material and 650 ° C. for an inorganic material, the porous heating element 100 with a catalyst function is particularly similar to a PTC thermistor if the temperature is determined from the resistance value corresponding to the temperature By using a porous resistance molded body having a positive temperature coefficient having the above characteristics based on actual measurement values, it is not necessary to provide a large-scale control circuit outside only by making the relationship between temperature and voltage correspond. The temperature of 300 ° C. and the inorganic material of 650 ° C. for decomposing the organic matter in the air to be purified indicate that when the platinum group catalyst 19 is used, it can be purified at a temperature lower than that. Even if it is set at a low temperature, it does not mean that it cannot be purified even with a specific organic or inorganic substance.

  As described above, the porous heating element 100 with a catalytic function used in the air purifying apparatus when the present invention is carried out may be used in a bundle as shown in FIG. 5, or the porous with a catalytic function shown in FIG. The heat generating element 200 has a rectangular shape on the outside and has a porous inner and outer surface. Therefore, even if it is simply laminated, it is difficult to slide in the length direction, so that it can be easily assembled. become. However, the platinum group catalyst 29 applied to the outer surface of the porous heating element 200 with a catalyst function cannot be used. In such a case, when the zigzag electrode plate 51 is disposed in the vertical direction, the horizontal direction, the vertical direction, and the horizontal direction as a means for forming the space, the platinum group applied to the surface of the porous heating element 200 with a catalytic function. The catalyst 29 can be used.

In the present embodiment, the heating element housing apparatus 300 is entirely composed of the housing 311 (311a, 311b, 311c, 311d, 311e, 311f) of the housing 310 and a plurality of partition walls 312 that allow fluid such as air to pass in a zigzag manner. However, in the heating element accommodating device 300, for example, when it is affected by the room temperature or the outside temperature outside the heating element accommodating device 300, the heat loss increases. Therefore, it is desirable that the entire stainless steel plate of the housing 311 be insulated with a heat-resistant insulating material 313 such as glass wool or rock wool, and further be an outer layer insulated with a synthetic resin or the like.
This heating element housing apparatus 300 can be used alone under a specific temperature condition such as room temperature, the temperature inside a refrigerator or a freezer. However, in order to activate the platinum group catalysts 19 and 29 and increase the treatment capacity, for example, organic treatment is performed at 300 ° C., organic harmful gases (bad odor), miscellaneous bacteria, and fungi are oxidized into water and carbon dioxide gas. It is desirable to decompose and extinguish.

The heat exchanger 400 heats the purified air introduced through the connection line 340 by the purified air supplied via the connection line 330 and the purified air discharged via the connection line 350. The heat exchanger 400 recovers heat energy. As the heat exchanger 400, a commercially available heat exchanger can be used as long as the fluid loss is small.
Incidentally, the heat exchanger 400 used in the present embodiment was previously filed by the present applicant as Japanese Patent Application No. 2013-258149.
As shown in FIGS. 11 to 15, the basic configuration is that a side plate 401 made of a heat insulating material, a spacer 434, and an uneven shape or an uneven line 423 are formed on the surface to increase the surface area, and from a material having good heat conduction. After the necessary number of partition plates 402 and spacers 434 are repeatedly stacked, the other side plate 401 is stacked to form the whole. Then, between the side plates 401 and the partition plate 402, the partition plates 402 are connected to each other so that the opposing surfaces form one fluid path, and purified air is introduced from the outside along the partition plate 402. The path from the connection pipe line 340 to be moved to the connection pipe line 320, the purified air processed by the heating element housing device 300 is moved along the partition plate 402, and the path from the connection pipe line 330 to the connection pipe line 350 is changed. Provided. In addition, a connecting line 320 for introducing the air to be purified from the outside to the other between the side plate 401 and the partition plate 402 connected to every other one of the opposing surfaces between the partition plates 402, and a connecting line A connection pipe 350 is provided for discharging the fluid flowing in from 320 through the partition plate 402.

  Furthermore, a heat exchanger 400 used in the air purification apparatus according to the embodiment of the present invention will be described with reference to FIGS. 11 to 15. The two side plates 401 made of the heat insulating material shown in FIGS. 11 and 15 and arranged to face both sides are synthetic resin plates, and examples of the synthetic resin include engineering plastic and super engineering plastic. Can be used. Specific examples include polyamide (nylon, aromatic polyamide, etc.), polyacetal, polycarbonate, modified polyphenylene ether, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), glass fiber reinforced polyethylene terephthalate, and cyclic polyolefin. As the super engineering plastic, polytetrafluoroethylene (PTFE), polysulfone, polyethersulfone, amorphous polyarate, liquid crystal polymer, polyamideimide and the like can be used.

  Further, the partition plate 402 is formed by stacking a plurality of necessary materials such as copper, aluminum, brass, iron, and the like having good heat conduction in the plane direction between the side plates 401. As shown in FIG. 15, an uneven line 423 is formed on the surface to increase the surface area relative to the planar area, and the entire shape (silhouette line) of the partition plate 402 is usually formed in a rectangle. And 10-20% of the upper and lower sides are the flat surfaces 424 that are not processed, and the uneven line 423 is formed on the surface of 60-80% at the center. In this embodiment, the concave and convex lines 423 that are long in the vertical direction are used, but instead of the concave and convex lines 423 that are long in the vertical and horizontal directions, a plurality of concave and convex shapes such as a specific columnar shape or a truncated cone shape are used. can do. Moreover, the bolt through-hole 421 which lets a volt | bolt pass is provided in the plane 424 which does not process 10-20% of the upper and lower sides. The partition plate 402 of the present embodiment uses 0.3 mm of aluminum.

The spacer 434 shown in FIG. 13 forms a flow of fluid along the partition plate 402 between one side plate 401 and the partition plate 402, or between the partition plates 402, and is positioned by the bolt through holes 421. ing. The spacers 434 are attached so as to be in close contact with the upper and lower 10 to 20% of the unprocessed flat surface 424 of the partition wall plate 402 made of the fixed heat insulating material. The spacers 434 have the same thickness and are wedge-shaped when viewed from the front (maximum area side), and are disposed at the upper and lower ends of the partition plate 402. The thickness of the spacer 434 is set to 2 to 5 mm uniformly. In a narrow part and a wide part, it is about 1: 4 to 1: 5. The thickness and size of the spacer 434 vary depending on the ability of the heat exchanger. As the spacer 434, a spacer having a thickness of 2 to 5 mm such as aluminum, copper, or iron can be used. Even if a stainless steel plate is used, the overall efficiency is slightly reduced, but there is almost no influence depending on the temperature range introduced into the heat exchanger. The side plate 401 of the present embodiment uses a stainless steel plate of 2.0 mm, and the spacer 434 uses a 3.0 mm aluminum plate. Other parts are also made of aluminum.
The spacer 434 is attached by positioning with the bolt through-hole 421 and is in close contact with a flat surface of the partition plate 402 that is not processed. The adhesive used at this time is preferably a synthetic resin system or a synthetic rubber system. Although complete adhesion is desirable, alignment may be performed to the extent that temporary fixing is possible, and individual bonding may not be performed.

Next, assembly of the heat exchanger 400 used in the air purification apparatus according to this embodiment will be described.
First, as shown in FIGS. 11 to 15, substantially L-shaped spacers 434 are positioned on the four sides of the partition plate 402 by bolt through holes 421, and the plurality of partition plates 402 are attached. Then, as shown in FIGS. 13 and 14, the required number of partition walls 402 and spacers 434 are stacked.
When the lamination of the partition plate 402 and the spacer 434 is completed, the side plate 401 shown in FIGS. 13 and 14 is fastened to the both sides by the bolt through holes 421 through the spacers 434.
Therefore, the bolt 416 is inserted from the bolt through hole 421 which is the insertion hole of one side plate 401, and the nut 417 is rotated to the tip of the bolt 416 inserted in the opposite side plate 401 to be screwed. The screwing of the bolt 416 and the nut 417 determines the degree of adhesion with the spacer 434 disposed therebetween, and is tightened with appropriate adhesion.

A plurality of spacers 434 and partition plates 402 are disposed on the inner sides of the outer side plates 401 on the left and right sides of the duct connection plate 407 in FIG. 11. The plurality of spacers 434 and partition plates 402 are repeatedly arranged. It is installed. Here, the end portions of the pair of side plates 401, the plurality of spacers 434, and the plurality of partition plates 402 are sealed with the spacers 434 and the duct connection plates 406, 407, and the pair of side plates 401, the plurality of spacers 434, and the plurality of pieces of the partition plates 402 are sealed. The partition plate 402 has a closed end.
Since these duct connection plates 406 and 407 hold and press the spacer 434 having elasticity on the surface, the duct connection plate 406 is connected from the connection pipeline 340 to the connection pipeline 320 of the duct connection plate 407. . Further, the connection pipe line 330 of the duct connection plate 407 is connected to the connection pipe line 350 of the duct connection plate 406.

The heat exchanger 400 thus configured exchanges heat so that the heat energy of the high temperature purified air stream is transferred to the low temperature purified air stream. Specifically, the operation is as follows.
First, when a high-temperature purified air flow is introduced from the connection pipe line 330, the air gradually moves down the uneven line 423 of the partition plate 402 while being guided by the spacer 434, and the remaining temperature after the heat exchange is performed. Air is exhausted from the connecting line 350.
In addition, a low-temperature purified air flow to be purified is introduced from the connection pipe 340, and the introduced purified air flow is gradually moved downward by the concavo-convex wire 423 while being guided by the spacer 434, and is subjected to heat exchange. The air whose temperature has increased is guided to the connecting pipe 320.

At this time, one of the purified air flow and the purified air flow is the purified air flow with the one partition plate 402 interposed therebetween, and the other is the purified air flow. Since this configuration occurs for each partition plate 402, the capacity of the heat exchanger 400 depends on the area of the partition plate 402, the flow velocity of the fluid, the temperature of the purified air flow, the temperature of the purified air flow, the environmental temperature, and the like. It is determined.
However, since the purified air flow and the purified air flow are independent circuits, for example, if the purified air flow is -40 ° C. and the purified air flow is as high as 400 ° C., the low temperature side is warmed and moisture condenses. Water droplets may be generated. In such a case, if the water droplets are left as they are, an unfavorable state occurs because the efficiency of heat exchange is reduced, hot water is blown out, or water that chemically reacts flows in the air duct. In such a case, it is desirable to remove water drops during heat exchange.

As described above, the purified air flow shown in FIGS. 11 to 14 is supplied from the connection pipe 330 with the purified air flow having a high temperature output from the heating element housing device 300, and the supplied purified air flow is supplied to the partition plate 402. It guides to the connection pipe line 350, exchanging heat and exchanging heat. Similarly, the purified air flow is supplied from the outside with a low temperature purified air flow from the connection pipe 340, and the supplied purified air flow is moved along the partition plate 402 to guide the connection pipe 320. .
The connection pipeline 330 of the duct connection plate 407 and the connection pipeline 350 of the duct connection plate 406, the connection pipeline 340 of the duct connection plate 406 and the connection pipeline 320 of the duct connection plate 407 are provided on the opposite sides of the opposing surface. The purified air flow and the purified air flow are X-axis flow.
At this time, water droplets guided by the spacer 434 and liquefied can be collected and discharged. In particular, the width of the spacer 434 can be set as such in the starch flow areas 491 and 492 where the air flow stagnation occurs even when facing the partition plate 402.

Further, in the air purification apparatus according to the present embodiment, the purified air flow and the purified air flow to be heat exchanged between the pair of side plates 401 made of a heat insulating material and the outer wall plate 480 facing the side plate 401. The outer wall plate 480 is formed with a heat insulating layer containing a fluid other than the above fluid.
That is, the outer wall plate 480 is formed with a box-shaped container with stainless steel plate, aluminum, copper, synthetic resin, etc. on the outside of the pair of side plates 401 made of heat insulating material, and fixed with bolts 416, and the inside is paired with a pair of It is sealed between the side plate 401. Thereby, a heat insulating layer of air is formed, and the heat exchange efficiency can be improved.
Moreover, in this Embodiment, since the heat insulation layer of air is shape | molded out of a pair of side plate 401, when installing, it can prevent heating outside or cooling.

In this embodiment, the low-temperature fluid of the purified air stream to be heat exchanged and the air flow to be purified between the pair of side plates 401 made of heat insulating material and the pair of outer wall plates 480 facing the pair of side plates 401. A heat insulating layer containing a fluid other than air is formed. However, the side plate 401 and the outer wall plate 480 may be integrally formed and used as the outer wall plate 480 (also serving as a side plate) or the side plate 401 (also serving as an outer wall plate).
Further, at this time, the heat insulating layer of the outer wall plate 480 (also used as a side plate) or the side plate 401 (also used as an outer wall plate) may not be simply an air layer, but may be a foamed layer or may be filled with other members. It can also be a layer.
Note that these configurations can be used for both the heating element housing device 300 and the heat exchanger 400.

Since the fluid of the purified air flow and the purified air flow of the present embodiment flows from the upper side to the lower side across the partition plate 402, both flow in parallel, and the heat conversion efficiency of the heat exchanger Can also be improved. In addition, the water discharge path for collecting and discharging the liquefied water droplets can be formed in the lower cylindrical connection pipe 320 and / or the connection pipe 350, and desired discharge can be performed.
As shown in FIG. 13, the spacer 434 is formed in a substantially L shape and used as a pair, but the material may be formed of metal, rubber, synthetic resin, or wood. The surface of the spacer 434 in FIG. 13 and FIG. 14 where the purified air flow and the purified air flow are in contact with each other can be configured so that a liquefied water droplet flows easily by providing a taper.

The heat exchanger 400 having such a configuration supplies the air to be purified to be purified through the filter 510 by a blower fan (not shown) of the blower 500. The to-be-purified air sucked by the blower 500 becomes a refrigerated room, a freezer room, a residential room, a source of specific harmful gas, etc. depending on the equipment. The filter 510 removes substances that may burn, such as dust.
Dust and the like are removed from the intake air sucked by the blower 500 by the filter 510 and gradually heated from the connection line 340 through the heat exchanger 400, and the lowermost stage of the heating element housing device 300 is connected from the connection line 320. The air heated by the porous heating element 100 with the catalytic function 100 and treated with the catalyst, ascends the inside of the heating element housing apparatus 300, and finally treated with the catalyst is discharged from the connecting pipe 330. At this time, the temperature of the air discharged from the heating element housing device 300 is processed at a set temperature of 300 ° C. for the organic substance and 650 ° C. for the inorganic substance.

Although the organic matter or the organic matter and the inorganic matter are removed from the air exhausted from the heating element accommodation device 300, since it is at a high temperature, the heat exchanger 400 uses the connection pipe 340 of the heat exchanger 400 to connect the heating element accommodation device 300. The temperature of the air flowing through the connection pipe line 320 is heated to increase the temperature, and an air flow that has lost heat energy is also discharged from the connection pipe line 350.
Therefore, regardless of whether the source of the specific harmful gas is a refrigerated room, a freezer room, or a residential room, the thermal energy of the purified air is reduced, and the load on the equipment in the refrigerated room, freezer room, and residential room is increased. There is no increase.
The connecting pipes 320, 330, 340, 350 used here may be flexible pipes or fixed pipes.

  The inventor is the kind of odor, namely sweat odor (ammonia, isovaleric acid, acetic acid), aging odor (ammonia, isovaleric acid, acetic acid, nonenal), excretion odor (ammonia, acetic acid, methyl mercaptan, hydrogen sulfide, Indole), garbage odors (ammonia, methyl mercaptan, trimethylamine, hydrogen sulfide), tobacco odors (ammonia, acetaldehyde, acetic acid, pyridine, hydrogen sulfide), and ammonia and hydrogen sulfide among the four major odorous substances Attached data about. The same applies to the other methyl mercaptans and trimethylamines, and the description thereof is omitted. In particular, when carrying out the present invention, it was confirmed that the deodorization effect can be completely removed at 300 ° C. for organic materials and 650 ° C. for inorganic materials, but 200 ° C. for organic materials and 500 ° C. for inorganic materials. However, it has been confirmed that there has been a phenomenon that can be purified if the actual heating temperatures of the porous heating elements 100 and 200 with catalytic function are partially 300 ° C. organic and 650 ° C. inorganic.

In particular, since the performance of a metal catalyst increases by the square when the temperature rises by 10 ° C., the characteristics near normal temperature only indicate whether or not it is functioning.
Moreover, when decomposing | disassembling inorganic gas except sulfur, phosphorus, chlorine, etc. with a platinum catalyst, 250 degreeC is required. However, when the catalyst is platinum, the platinum of the catalyst is not oxidized and returned, so that maintenance replacement is necessary.
However, when palladium decomposes inorganic gases other than sulfur, phosphorus, chlorine, etc., palladium is oxidized once, but is more advantageous than platinum because it is metallized at a high temperature. In order to satisfy this condition, a catalyst temperature of 300 ° C. is required.
And as for the temperature which processes various gas with a catalyst, processing temperature changes with the kind of gas. Ethylene gas is about 80 ° C., and ammonia gas requires the highest temperature and is generally said to be 300 ° C.

The platinum group catalysts 19 and 29 used here have ethanol, normal propyl alcohol, methanol and water as solvents, so they can be easily impregnated and applied to the surfaces of the porous resistance molded bodies 10C and 20C. Can be dried. The platinum group catalyst 19 may basically be one obtained by dissolving palladium in an inorganic solvent and / or an organic solvent.
In this embodiment, the entire porous resistance molded bodies 10C and 20C are immersed in platinum group catalysts 19 and 29 dissolved in an inorganic solvent and / or an organic solvent, but only the outer periphery of the porous resistance molded bodies 10C and 20C. Alternatively, spraying or brushing may be applied only to the inner periphery.

In the present embodiment, the entire porous resistance molded body 10C, 20C is immersed in platinum group catalysts 19, 29 dissolved in an inorganic solvent and / or an organic solvent, and then the porous resistance molded body 10C is dried in step S7. , 20C, platinum group catalysts 19 and 29 are attached, and then fixed. The platinum group catalysts 19 and 29 supported and immobilized thereon are the porous heating elements 100 and 200 with a catalyst function of the present embodiment.
In this embodiment, a 30% aqueous solution of polyvinyl alcohol (PVA) is used as the binder and does not necessarily exhibit insulating properties, but in order to reduce electrical resistance, the electrode terminals 17, 18, 27, 28 are used. The surface was washed with ethanol, but may be subjected to a treatment such as polishing to remove the surface stain mechanically. Thereby, the contact resistance of the electrode terminals 17, 18, 27, 28 can be lowered.

The inventor conducted the following experiment in order to examine the ability of the catalyst.
Experiment. 1
The inventor rotates and circulates a fan in a space of a closed acrylic box (41 liters), puts three 20φ, 20 cm porous heating elements 100 with a catalytic function therein, and adds 4100 ppm of ammonia gas to it. Liter was injected. The measuring instrument is a Kitagawa gas detector tube 105SC (5 to 260 ppm). A voltage of 14 V was applied to the electrode films 13 and 14 between the porous heating element 100 with catalytic function, and 180 ° C. was obtained as the peak temperature of the porous heating element 100 with catalytic function.
Table 1 shows the ammonia deodorizing ability test results of the porous heating element 100 with a catalyst function, and Table 2 shows the blank test results. FIG. 16 is a characteristic diagram of an ammonia deodorization test using the porous heating element with a catalyst function of the present embodiment.

The ammonia concentration, which was 85 ppm at the time of injection, was less than 5 ppm, which is the lower limit of quantification, 45 minutes after the voltage application, and 0 ppm after 1.5 hours of voltage application. Moreover, in the blank test of acrylic BOX (room temperature), the ammonia concentration which was 80 ppm at the time of ammonia gas injection became 60 ppm after 2.5 hours of ammonia gas injection. And in the state which accommodated three porous heating elements 100 with a catalyst function in the acrylic box at normal temperature, the ammonia concentration which was 90 ppm at the time of ammonia gas injection becomes less than 5 ppm which is a minimum limit of quantification after 2.5 hours of gas injection. It was.
This result shows that even when a voltage of 14 V is applied between the electrode films 13 and 14 of the porous heating element 100 with a catalyst function, the platinum group catalyst 19 does not rapidly reach the peak temperature (180 ° C.). In the vicinity of the temperature (180 ° C.), it means that ammonia was rapidly decomposed by the catalyst.

Experiment. 2
Similarly, the inventor rotates and circulates a fan in the space of a closed acrylic box (41 liters), and uses three 20φ, 20 cm porous heating elements 100 with a catalytic function therein, and hydrogen sulfide therein. 1000 liters of 1000 liters were injected. The measuring instrument is a Kitagawa gas detection tube 120SE (0.5 to 40 ppm). A voltage of 20 V was applied to the electrode films 13 and 14 between the porous heating element 100 with a catalytic function, and 200 ° C. was obtained as the peak temperature of the porous heating element 100 with a catalytic function.
Table 3 shows the hydrogen sulfide gas deodorizing ability test results of the porous heating element 100 with a catalyst function, and Table 4 shows the blank test results.

In the blank test of acrylic BOX (room temperature), the hydrogen sulfide gas concentration, which was 17 ppm at the time of hydrogen sulfide gas injection, was maintained at 17 ppm even after 2 hours of hydrogen sulfide gas injection. The hydrogen sulfide gas concentration, which was 10 ppm at the time of hydrogen sulfide gas injection, became 0 ppm 30 minutes after the voltage application. Even when three porous heating elements 100 with a catalyst function were housed in an acrylic box at room temperature, the hydrogen sulfide gas concentration, which was 13 ppm at the time of hydrogen sulfide gas injection, became 0 ppm after 2 hours of hydrogen sulfide gas injection.
This result shows that even when a voltage of 20 V is applied between the electrode films 13 and 14 of the porous heating element 100 with a catalyst function, the platinum group catalyst 19 does not rapidly reach the peak temperature (200 ° C.). In the vicinity of the temperature (200 ° C.), it means that the hydrogen sulfide gas was rapidly decomposed by the catalyst. In particular, as shown in FIG. 17 and Table 4, hydrogen sulfide gas is decomposed by the platinum group catalyst 19 even at room temperature.

  The inventor asked the Fukui Prefectural University's Department of Biological Resources to cooperate in the deodorization test and conducted various gas removal tests. The ammonia removal test and the hydrogen sulfide gas removal test were almost the same, and FIG. An ethylene gas removal test was performed with a detector tube and an ethylene gas detector tube, and the acetic acid gas removal test was performed with a detector tube meter and an acetic acid gas detector tube in FIG. did it. Basically, even if various gases are changed, the performance of the metal catalyst increases by a square whenever the temperature of 10 ° C. rises. Therefore, if an organic gas is treated at 300 ° C., it can be processed in a short time.

Further, FIG. 20 to FIG. 26 show another example of the heating element housing device 600 using the porous heating elements 100 and 200 with a catalytic function used in the air purification apparatus according to the present embodiment.
In the figure, a heating element housing device 600 is an insulation of the porous heating element 100 with a catalyst function from a housing 650 by a heat-resistant heat insulating material 613 such as glass wool or rock wool (not shown).
Specifically, the heating element housing device 600 is composed of a casing 611 of a housing 650 formed entirely of a stainless steel plate, a boundary plate 620 that allows fluid such as air to pass in a zigzag manner, partition walls 625 and 626, and connection pipe lines 320 and 330. ing.
The casing 611 is formed by a box having six surfaces, and is formed by a back plate 611a and a front plate 611b, an upper plate 611c and a lower plate 611d as a frame, a right plate 611e, and a left plate 611f.
In addition, the partition walls 625 and 626 of the housing 611 are distinguished from the front side and the rear side, and each is formed into 10 sections vertically. By providing the partition walls 625 and 626, the air flow travels 10 times as much as the lateral width of the front plate 611b of the housing 611.

Between the partition walls 625 and between the partition walls 626, a porous heating element 100 with a catalytic function and porous heating element bundles 601 to 605 with a catalytic function insulated by any one of heat-resistant insulating materials 613 such as glass wool and rock wool are arranged. It is installed. That is, the porous heating element 100 with a catalyst function of the present embodiment is bundled and electrically connected to each other so that the electrode terminals 17 and 18 can be energized. The body 100 is insulated and at the same time the surrounding sealability is enhanced so that an air flow is generated only in the through hole 11 of the porous heating element 100 with a catalytic function.
Also in this modification, the porous heating element 200 with the catalyst function of the embodiment shown in FIG. 3 can be used, and another arrangement example of the porous heating element 100 with the catalyst function shown in FIG. 7 is shown. It can also be assembled as shown in the illustration.

At this time, there is a dead space between the upper surface plate 611c and the partition walls 625 and 626 of the heating element housing device 600 or between the lower surface plate 611d and the partition walls 625 and 626. Of course, in the dead space between the lower surface plate 611d and the partition walls 625 and 626, there is a heavy object such as a concrete or a porous heating element with a catalytic function that is not well baked, which allows the heating element housing device 600 to stand stably. You can pack it.
The distance between the other partition walls 625 and 626 and the size of the through hole 11 of the porous heating element 100 with a catalyst function are determined by the treatment capacity of the catalyst.
A space formed by the casing 611 (back plate 611a, front plate 611b, top plate 611c, bottom plate 611d, right plate 611e, left plate 611f) and partition walls 625, 626 is a porous heating element bundle 601 with a catalytic function. 605 is stored, and it has been described on the premise that the air to be purified flows through the through-hole 11 of the porous heating element 100 with a catalyst function. However, even when the present invention is implemented, as shown in FIG. When the outer periphery of the porous heating element 100 is an air flow permeation path, an efficient catalyst reaction can be obtained.

  In the air purification apparatus according to the embodiment shown in FIGS. 5 to 15, porous heating element bundles 301 to 306 with catalytic functions, in which six layers of porous heating elements 100 with catalytic functions are stacked in the vertical direction, are arranged. However, rather than setting the peak value at 300 ° C. for organic materials and 650 ° C. for inorganic materials as the heat source, the temperature atmosphere continues for a little longer, and the purified air passes through the temperature atmosphere of 300 ° C. for organic materials and 650 ° C. for inorganic materials. The reaction time of the catalyst is increased to increase the processing capacity.

  20 to 26, the porous heating element bundles 601 to 605 with catalyst function on one side and the porous heating element bundles 606 to 610 with catalyst function on the other side are stacked in two rows in the front and rear, and the catalytic function The porous heating element bundles 601 to 605 with catalyst and the porous heating element bundles 606 to 610 with catalyst function are set so that the upstream of the air is low and the downstream of the air is high, and the heated air rises by its buoyancy. And even if the ability to forcibly blow is reduced, there is no problem. Further, the entire temperature of the heating element housing device 600 can reach 300 ° C. for the target organic substance and 650 ° C. for the inorganic substance.

  The boundary plate 620 disposed between the porous heating element bundles 601 to 605 with catalyst function and the porous heating element bundles 606 to 610 with catalyst function is combined with the porous heating element bundles 601 to 605 with catalyst function and the catalytic function. The locations where the attached porous heating element bundles 606 to 610 are opposed to each other are sandwiched between a stainless steel plate 621, punching boards 622 and 624 welded to both ends thereof, and a partition wall 625 on the connection pipe 320 side. A shielding plate 623 is disposed only in the portion that is made. The punching boards 622 and 624 are flow paths that allow an air flow to pass between adjacent porous heating element bundles 601 to 605 with catalyst function and porous heating element bundles 606 to 610 with catalyst function, and are also shielded. The plate 623 is a guide for feeding an air flow only to the porous heat generating element bundle 601 with the catalyst function at the lowest stage. The punching boards 622 and 624 are for the purpose of causing a fluid flow on the front and back, and other structures may be employed.

  The upper and lower sides of the heating element housing device 600 are partitioned by a partition wall 626 opposite to the partition wall 625, and are provided with a porous heating element bundle 601 to 605 with a catalytic function and five porous layers with a catalytic function on one side and 10 levels on both sides. The heating element bundles 606 to 610 are passed. At this time, since a predetermined voltage is applied to the electrode films 13 and 14 of each porous heating element 100 with a catalytic function, the air to be purified is a porous heating element bundle 601 with a catalytic function under a predetermined temperature condition. When passing through 605, 606 to 610, the platinum group catalyst 19 carried on each porous heating element 100 with a catalytic function can be purified to clean air by the reaction of the catalyst.

  As described above, the porous heating elements 100 and 200 with a catalytic function used in the air purification apparatus according to the present embodiment are made of 30-50 wt% aluminum powder, 5-10 wt% graphite powder, The sintered raw material mixture 10 is mixed by mixing 30 to 50 wt% clay powder and 0 to 10 wt% wood powder, and water and / or binder 0 to 25 wt% that does not move due to the difference in specific gravity with respect to the whole. In addition, kneading is performed in step S1, pressure is applied in step S2, molding is performed in step S3, sintering is performed in step S3, and there is a void in the range of 5% to 50%. Porous resistance moldings 10C and 20C having a positive resistance temperature characteristic that is low and rises rapidly when the temperature rises to a predetermined temperature, and inorganic solvents and / or organics carried on the porous resistance moldings 10C and 20C Those having a platinum group catalyst 19 and 29 dissolved in agent.

The porous heating elements 100 and 200 with a catalytic function are prepared by mixing aluminum powder 2, graphite powder 3, glazed clay powder 4, wood powder 5 and resistance adjuster 7 as required, and mixing the mixture with a sintered raw material mixture 10. In addition, water and / or binder 6 that does not move due to the difference in specific gravity is added to and kneaded with respect to the whole, and pressure is applied to form, and the resultant is sintered to be within a range of 5% to 50%. A porous resistance molded body having a positive resistance temperature characteristic that has a void and has a resistance value that is low at normal temperature and suddenly increases when the temperature rises to a predetermined temperature when energized. The platinum group catalysts 19 and 29 dissolved in a solvent are attached and dried.
Therefore, since the sintered porous resistance molded bodies 10C and 20C have voids in the range of 5% to 50%, the surface area is widened, and the surface is used as the platinum group catalysts 19 and 29. Therefore, the reaction rate of the catalyst can be increased and the reaction efficiency can be increased. Also in the experiment, a deodorizing effect was confirmed for substances on which the platinum group catalysts 19 and 29 act at room temperature, and further, the catalyst could be deodorized at high speed by heating. Regarding the deodorizing effect, it was confirmed that the organic substance can be completely deodorized at 300 ° C. and the inorganic substance can be completely removed at 650 ° C.

The porous resistance molded bodies 10C and 20C were mixed with a mixture of aluminum powder 30 to 50 wt%, graphite powder 5 to 10 wt%, clay powder 30 to 50 wt%, wood powder 0 to 10 wt%, etc. Since it is made into the binder raw material mixture 10, 0-25 wt% of water is added to the whole, kneaded, molded by compression molding or extrusion molding, dried and then sintered in step S3. The effect of.
That is, in the sintered raw material mixture 10, for example, if the content of aluminum powder is less than 30 wt%, the aluminum powder is too small and the electrical conductivity is impaired. On the other hand, when the content of aluminum powder exceeds 50 wt%, the portion of the aluminum powder that is not covered with graphite powder increases, which tends to cause a sintering failure in which molten aluminum is ejected to the surface in the firing process. Become. However, in the present embodiment, since the aluminum powder is 30 to 50 wt%, it is possible to maintain electrical conductivity and hardly cause poor sintering.

Further, for example, if the content of the graphite powder 3 is less than 5 wt%, the graphite powder 3 is too small and the portion of the aluminum powder 2 that is not covered with the graphite powder 3 increases, thereby melting in the firing process. It becomes easy to produce the sintering defect which the aluminum which ejected on the surface. On the other hand, when the content of the graphite powder 3 exceeds 10 wt%, the graphite powder 3 is too much, and the strength and purity of the porous resistance molded bodies 10C and 20C are lowered, so that the porous heating element can be used as a resistance heating element. Insufficient strength and energization heat generation. However, in the present embodiment, since the graphite powder content is 5 to 10 wt%, the sintering failure in which aluminum is ejected to the surface and the strength of the porous resistance molded body do not decrease.
And, if the content of clay powder such as glazed clay powder 4 for ceramics is, for example, less than 30 wt%, there is too little clay powder for ceramics, and the resistance value of the resulting molded resistor becomes small, When the porous heating element is used as a resistance heating element, the current-generating heat generation is insufficient. On the other hand, when the content of the ceramic clay powder 4 for ceramics exceeds 50 wt%, the ceramic clay powder 4 for ceramics is too much, and the electrical conductivity is impaired. Therefore, those problems do not occur.

  Further, the wood powder 5 is obtained by finely pulverizing wood chips with a pulverizer, and it is preferable to use a whisker-like one. For example, by using the whisker-like wood powder 5, raw materials such as aluminum powder 2, graphite powder 3, and glazed clay powder 4 are entangled in whisker-like crevice-like gaps. What is generated by applying pressure in the molding step of Step S2 is strong and dense, but the porous resistance molded bodies 10C and 20C can be obtained even if the wood powder 5 is not contained. Usually, it is desirable to mix 0 to 10 wt%. Therefore, according to the heating element having a positive resistance temperature characteristic according to the present invention, it is surely high in strength and energizing heat generation and high in purity.

In the sintered raw material mixture 10, the content of the aluminum powder 2 is in the range of 40 wt% to 45 wt%, the content of the graphite powder 3 is in the range of 5 wt% to 10 wt%, and the mineral powder (ceramics) When the content of the clay mesh powder 4) for use is in the range of 40 wt% to 45 wt%, it is possible to more reliably ensure high strength and purity as well as energization exothermicity in a porous positive resistance temperature characteristic heating element. Therefore, it is more preferable.
The platinum group catalysts 19 and 29 dissolved in an inorganic solvent and / or an organic solvent attached to the porous resistance molded bodies 10C and 20C are ruthenium, rhodium and palladium having similar physical properties and chemical properties. , Osmium, iridium, platinum, etc. can be used. In this case, the catalyst selected from them is dissolved in an inorganic solvent and / or an organic solvent, dipped, applied, and dried, so that the production is simple.

  The air purification apparatus according to the embodiment of the present invention is a sintered raw material mixture mixed by blending aluminum powder 30-50 wt%, graphite powder 5-10 wt%, clay powder 30-50 wt%, and wood powder 0-10 wt%. 10 and water and / or binder 0-25 wt% that does not move due to the difference in specific gravity with respect to the entire sintering raw material mixture 10 and kneaded in step S1, and by applying pressure in step S2, forming, It is sintered in step S3 and has a void in the range of 5% to 50%. When energized, the resistance value is low at normal temperature, and the resistance value increases rapidly when the temperature rises to a predetermined temperature. A voltage is supplied between the electrode films 13, 14 and the porous resistance molded bodies 10C, 20C having temperature characteristics, the electrode films 13, 14 formed by spraying metal on both sides of the porous resistance molded bodies 10C, 20C. Porous The porous resistance integrated with the platinum group catalysts 19 and 29 dissolved in the inorganic solvent and / or organic solvent carried on the porous resistance moldings 10C and 20C in step S6 by heating the resistance moldings 10C and 20C. From the heating element housing devices 300 and 600 including the molded body and the electrode films 13 and 14 and the housings 311 and 611 housing the platinum group catalysts 19 and 29, and the housings 611 of the heating body housing devices 300 and 600, respectively. A heat exchanger that supplies thermal energy to the air to be purified supplied to the housing 611 of the heating element housing devices 300 and 600 before the purified air is introduced and discharged. 400.

As described above, the air purification apparatus according to the embodiment of the present invention is a sintered raw material mixture 10 mixed by blending with aluminum powder 2, graphite powder 3, glazed clay powder 4, and wood powder 5, and the entirety thereof. On the other hand, water and / or binder 6 that does not move due to the difference in specific gravity is added and kneaded in step S1, and pressure is applied in step S2 to form it. In contrast to porous resistance molded bodies 10C and 20C having positive resistance-temperature characteristics in which, when energized, the resistance value is low at normal temperature and the resistance value increases rapidly when the temperature rises to a predetermined temperature. The platinum group catalysts 19 and 29 dissolved in an inorganic solvent and / or an organic solvent are supported and adhered, and dried.
Therefore, the heating element housing device including the integrated porous resistance molded bodies 10C and 20C and the electrode films 13 and 14 and the casings 311 and 611 for housing the platinum group catalysts 19 and 29 includes the electrode films 13 and 14 and the copper film. A temperature can be controlled by applying a voltage between electrodes consisting of electrode leads 15 and 16 and electrode terminals 17 and 18, and the porous resistance molded body, the electrode and the platinum group catalyst are integrated. Since it is accommodated in the casings 311 and 611, heat loss can be reduced.
Further, the heat exchanger 400 introduces high-temperature purified air from the housing 311 of the heating element housing device 300 and is supplied to the housing 311 of the heating element housing device 300 until the purified air is discharged. Since heat energy is supplied to the air to be purified, only the inside of the heating element housing device 300 is heated to a high temperature, so that there is little loss of heat energy.
In addition, since the porous resistance molded bodies 10C and 20C can use a high-temperature catalyst when energized, the speed of the chemical reaction of the specific substance to be treated with the catalyst can be increased. Moreover, since the platinum group catalysts 19 and 29 do not electrically short-circuit the porous resistance molded bodies 10C and 20C, stable use is possible. In particular, the concentration of the platinum group catalysts 19 and 29 can be lowered, and when the aluminum powder 2 forms the porous resistance moldings 10C and 20C, it becomes aluminum oxide and exhibits insulating properties. , 20C is not energized to the platinum group catalysts 19, 29.
And since a catalyst can be used at high temperature by electricity supply, it is suitable when increasing the speed | rate of the chemical reaction of the specific substance processed with a catalyst. Moreover, since the platinum group catalysts 19 and 29 do not electrically short-circuit the porous resistance molded bodies 10C and 20C, stable use is possible. In particular, the concentration of the platinum group catalysts 19 and 29 can be lowered, and when the aluminum powder 2 forms the porous resistance moldings 10C and 20C, it becomes aluminum oxide and exhibits insulating properties. , 20C is not energized to the platinum group catalysts 19, 29.

  The air purification apparatus according to the present embodiment is further designed to be an air purification apparatus that purifies by deodorization, sterilization, and removal of a specific substance. Further, the purified air is sucked from the heat exchanger 400 or the purified air is supplied to the heat exchanger 400. Since the blower 500 to be supplied is disposed, the blower 500 that sucks the purified air from the heat exchanger 400 or supplies the purified air to the heat exchanger 400 is provided on the side of the heat exchanger 400 opposite to the non-heating element housing device. By installing, the blower 500 is not used in a high temperature environment without using a heat-resistant electric motor that can withstand high temperature conditions.

  In the air purification device of the above embodiment, one heat exchanger 400 is associated with one heating element housing device 300, but a plurality of heat exchangers may be connected. At this time, there is a method of passing only the flow of the purified air and the purified air through a plurality of heat exchangers 400. This method simply increases the heat exchange surface area inside the heat exchanger 400. However, with one heat exchanger 400, it is difficult to obtain a temperature difference that is extremely wide due to the heat conduction of the components constituting the heat exchanger 400.

FIG. 27 shows an air purification apparatus according to an embodiment that solves such a problem.
In the figure, the basic configuration is not different from that of the air purification device of FIG. 5 until the heating element housing device 300 and the heat exchanger 400 are connected. The difference is that the connection line 720 of another heat exchanger 700 is connected to the connection line 350 of the heat exchanger 400 so that the purified air further passes through the heat exchanger 700. The purified air in the heat exchanger 700 is sucked by the blower 800 connected to the connecting pipe 740 and supplied as purified air.
In addition, outside air is sucked into the connection pipe line 730 of the heat exchanger 700, outside air is taken in from the connection pipe line 730, passes through the heat exchanger 700, and is discharged from the connection pipe line 760. A blower 900 is attached to the connection pipe line 760, and the air of the connection pipe line 720 is sucked.

  Therefore, in the heat exchanger 700, the purified air supplied from the connection pipe 350 of the heating element housing device 300 enters the heat exchanger 700 through the connection pipe 720, and is sucked by the blower 800 through the connection pipe 740. Supply purified air to the specified space. On the other hand, outside air is supplied from the connection pipe line 730 of the heat exchanger 700. This outside air may be indoor air or outdoor air, but means air that is not used for air purification. This is treated as outside air from normal usage. The outside air supplied from the connection pipe line 730 is heat-exchanged by the heat exchanger 700 and discharged from the blower 900 connected to the connection pipe line 760 to the outside air side. Normally, the outside air supplied from the connection pipe line 730 is stopped at 30 to 40 ° C., so that the temperature of the purified air can be drastically decreased.

In addition, since the heat generator housing device 300 separates the heat exchanger 400 and the heat exchanger 700 separately, a range in which heat can be conducted through the components is determined, and the purified air and the object to be purified are affected by the heat exchange. Even if the temperature reaches an intermediate temperature with the air, the heat exchanger 700 is heat-exchanged by the air flow flowing from the connection pipe line 730 to the connection pipe line 760, so that an efficient temperature drop is performed.
Of course, the heat generator housing device 300 may be configured such that the heat exchanger 400 and the heat exchanger 700 are connected, and the connection line 340 of the heat exchanger 400 is directly connected to the connection line 730 of the heat exchanger 700. Even in this case, since the heat exchanger 400 and the heat exchanger 700 can be isolated, heat conduction is blocked through the components.

That is, the heat exchangers 400 and 700 of the air purification apparatus according to the present embodiment include two or more heating element accommodating devices 300, and heat exchange in the heat exchangers 400 and 700. Since the air flow to be performed is set as heat exchange between the purified air flow and the air flow to be purified, the heat conduction of the components of the heat exchangers 400 and 700 is cut off, and one unit is below a predetermined temperature. Even when the temperature does not decrease, the heat exchange efficiency can be increased by separation.
Further, the heat exchangers 400 and 700 are provided in a plurality with respect to one of the heating element accommodating devices 300, and the air flow that exchanges heat in the heat exchangers 400 and 700 should be purified with the purified air flow. Since the heat exchange with the air flow and the heat exchange between the outside air and the purified air flow or between the outside air and the air flow to be purified are set, the heat conduction of the components of the heat exchangers 400 and 700 causes a temperature lower than a predetermined temperature. Even if the temperature does not decrease, the heat exchange efficiency can be increased by separating. In addition, the other heat exchanger 700 exchanges heat between the outside air and the purified air flow or between the outside air and the air flow to be purified. Even if the temperature of the purified air in the heating element housing device 300 is high, It can be forcibly lowered to the temperature. From the opposite viewpoint, even if the temperature of the purified air in the heating element housing device 300 is low, it can be forcibly raised to the outside temperature.

The porous heating elements 100 and 200 with a catalyst function used in the air purification apparatus according to the above embodiment are aluminum powder 30 to 50 wt%, graphite powder 5 to 10 wt%, clay powder 30 to 50 wt%, and wood powder 0 to 10 wt%. In addition, 0 to 25 wt% of water is added to the whole and kneaded in step S1, molded by compression molding or extrusion molding in step S2, and dried as necessary. After that, sintering is performed in step S3.
The sintered raw material mixture 10 mainly composed of the aluminum powder 2, the graphite powder 3, and the square clay powder 4 is kneaded by adding water in step S1, and then pressed or extruded by a mold in step S2. It is formed into an arbitrary shape by extrusion molding with a molding machine, and is sintered in a temperature controlled electric furnace within a range of 900 ° C. to 1200 ° C., for example. Sintering in the temperature controlled electric furnace in the range of 900 ° C. to 1200 ° C. is a result of repeated experiments by the inventors, and as a result, sufficient sintering is not performed at temperatures lower than 900 ° C., resulting in poor sintering. It was confirmed that the lower limit of the sintering temperature was 900 ° C., and when it exceeded 1200 ° C., it was confirmed that the obtained molded body had a high probability of not having positive characteristics. The upper limit of the sintering temperature is 1200 ° C.
Here, by forming the sintered raw material mixture 10 in which the aluminum powder 2, the graphite powder 3, and the ceramic clay powder 4 for ceramics are mixed by a specific blending, these are formed by applying pressure in step S2. The sintering raw material mixture 10 becomes a strong and dense solid state. Moreover, you may use it, melt | dissolving a binder with respect to water. Therefore, by sintering in this state, high-strength porous resistance molded bodies 10C and 20C can be obtained. Further, the wood powder 5 is not only related to the porous voids, but also effective in a reducing atmosphere during sintering.
In addition, the clay mesh powder 4 is a clay powder for ceramics as a mineral powder. For example, aluminum oxide and silicon oxide, composite oxide of aluminum oxide and silicon oxide, aluminum silicate What is necessary is just to contain at least 1 sort (s) of them, for example, Sasame clay, Kibushi clay, kaolin, feldspar, ceramic stone powder, etc. are used. The powder of the above-mentioned clay, kibushi clay, kaolin, feldspar, and porcelain is usually called mineral powder and is a clay powder for ceramics.
When the porous resistance moldings 10C and 20C of the sintering raw material mixture 10 mainly composed of the aluminum powder 2, the graphite powder 3, and the square clay powder 4 have a low resistance at room temperature and rise to a predetermined temperature. It has a positive resistance temperature characteristic in which the resistance rapidly increases. Further, the plurality of through holes 11 and 21 provided for the porous resistance molded bodies 10C and 20C are not particularly limited in cross-sectional shape, but those having a small air resistance and a large surface area are preferable. It is.

  As the aluminum powder, for example, those having an irregular shape (needle shape, spindle shape, etc.) manufactured by an atomizing method (spray type) are used. The median diameter measured by the laser diffraction / scattering method is in the range of 30 μm to 75 μm and the particle diameter measured by the sieve test method is less than 150 μm, preferably the median diameter is in the range of 35 μm to 65 μm. Yes, the particle diameter is less than 100 μm.

  In the porous heating elements 100 and 200 with a catalytic function used in the air purification apparatus according to the above embodiment, the porous resistance molded bodies 10C and 20C are further provided with electrode films 13 and 14 by metal spraying on both sides thereof. Since it is provided, the catalyst can be used at a high temperature, which is suitable for increasing the speed of the chemical reaction of a specific substance to be treated with the catalyst. Moreover, since the platinum group catalysts 19 and 29 do not electrically short-circuit the porous resistance molded bodies 10C and 20C, stable use is possible. In particular, the concentration of the platinum group catalysts 19 and 29 can be lowered, and when the aluminum powder 2 forms the porous resistance moldings 10C and 20C, it becomes aluminum oxide and exhibits insulating properties. The platinum group catalysts 19 and 29 are not energized from 20C.

  The porous heating elements 100 and 200 having a catalytic function used in the air purifying apparatus according to the above embodiment are further provided with electrode films 13 and 14 by metal spraying on both sides of the porous resistance molded bodies 10C and 20C. It is a thing. Here, since the electrode films 13 and 14 formed on both ends of the porous resistance molded bodies 10C and 20C are molded by metal spraying, the connection with the porous resistance molded bodies 10C and 20C has a large surface area. Bonding molding can be performed under conditions, the resistance value on the electrode films 13 and 14 side can be reduced, and the electrode films 13 and 14 are not easily deteriorated even when used for a long time.

Since the sintering raw material mixture 10 is a mixture of metal silicon powder 5 to 10 wt% and iron powder 0 to 10 wt%, it is possible to ensure current-carrying stability. Moreover, since iron powder functions as a resistor when oxidized, it can be used for resistance value control. You can control whether or not. In particular, a mixture of silicon powder (semiconductor) 5 to 10 wt% and iron powder 0 to 10 wt% can easily set the Curie point temperature.
The metal silicon powder of 5 to 10 wt% increases the current-carrying stability that ensures the current-carrying property as a material that does not oxidize. Moreover, 0-10 wt% of iron powder can be used for resistance value control which functions as a resistor by oxidation, and can exhibit stable performance as a heating element. However, the mixing of the metal silicon powder and the iron powder is not recommended to be mixed in a large amount because the property as a positive characteristic heating element having a positive temperature coefficient having the same characteristics as the PTC thermistor is deteriorated.

Further, the platinum group catalysts 19 and 29 have a single alloy composed of a combination of palladium and platinum, palladium and silver, palladium and ruthenium, palladium and rhodium, or a two-layer structure containing palladium.
Therefore, the platinum group catalysts 19 and 29 of the porous heating elements 100 and 200 with catalytic functions are composed of palladium or a combination containing palladium such as palladium and platinum, palladium and silver, palladium and ruthenium, palladium and rhodium, and the like. Since the alloy or the two-layer structure containing palladium is used, the platinum group catalysts 19 and 29 contain palladium and are dissolved in an inorganic solvent and / or an organic solvent, dipped, applied, and dried. It is easy to handle and easy to manufacture.

Platinum group catalysts 19 and 29 are blended with ethanol 40-50 wt%, normal propyl alcohol 5-10 wt%, palladium 5 wt% or less, methanol 0.5-3 wt%, dispersion resin 0.5 wt% or less, and the balance as water. It is.
Here, palladium of the platinum group catalysts 19 and 29 uses ethanol, normal propyl alcohol, methanol, and water as solvents, so it can be easily applied and impregnated, and applied to the surface of the porous resistance molded body and dried. can do. Basically, any palladium may be used as long as it is dissolved in an inorganic solvent and / or an organic solvent.

  In the air purification apparatus according to the above-described embodiment, the embodiment has been described as the use of the porous heating elements 100 and 200 with a catalytic function. However, when the present invention is carried out, the firing performed in the molding process of step S2 is performed. The pre-bonded molded bodies 10A and 20A can be fired into an arbitrary shape. In particular, when a plurality of porous resistance molded bodies 10C and 20C are used like the porous heating elements 100 and 200 with a catalyst function of the present embodiment, one existing due to an abnormality in the porous resistance molded bodies 10C and 20C. However, since it is possible to operate with other porous resistance molded bodies 10C and 20C, it is better to combine a plurality of porous heating element bundles 301 to 306 with a catalyst function or porous heating element bundles 601 to 610 with a catalyst function. High reliability can be achieved.

  In the use of the air purification apparatus according to the above embodiment, glass wool as the heat-resistant insulating materials 313 and 613 is used to bundle the porous heating element bundles 301 to 306 with catalytic function or the porous heating element bundles 601 to 610 with catalytic function. An electrical insulator was used with heat-resistant insulating materials 313 and 613 having a high heat-resistant temperature such as rock wool. However, when the present invention is carried out, when the porous resistance molded bodies 10C and 20C are formed, the surface is formed with an aluminum oxide film and is in an insulating state. , Normal propyl alcohol, palladium, methanol, dispersion resin, and the remainder as water, and even if it is supported on the porous resistance molded bodies 10C and 20C, the electrical insulation between the casing 611 is maintained. Therefore, it is not always necessary to use an electrical insulator. However, since there are individual differences in the handling of the heating element accommodating devices 300 and 600, the specifications of the heat resistant insulating materials 313 and 613 are higher in safety.

The porous heating elements 100 and 200 with a catalytic function used in the air purifying apparatus according to the present embodiment are air purifying apparatuses that purify the air to be purified such as exhaust gas, drainage, dust collection, and powder of a factory or a vehicle. As described above, the porous heating elements 100 and 200 with a catalyst function of the present embodiment are used when a specific component is deleted from a component in which an organic substance and an inorganic substance are mixed. It can also be used as a device for removing odors by attaching it to a human waste processing device owned by a livestock farmer.
Moreover, although the porous heating element 100,200 with a catalyst function used in the air purification apparatus according to the present embodiment has been described as an example in which only one through hole 11, 12 is provided, when the present invention is implemented, Can also be made into the porous resistance moldings 10C and 20C in which two or more through-holes 11 and 12 are provided for one molding body 10A and 20A before sintering.

2 Aluminum powder 3 Graphite powder (graphite powder)
4 Clay clay powder 5 Wood powder 6 Water / binder 7 Resistance adjusting agent 10 Sintering raw material mixture 11, 21 Through holes 10A, 20A Pre-sintered molded bodies 10B, 20B Molded resistors 10C, 20C Porous resistance molded body 13, 14, 23, 24 Electrode films 15, 16, 25, 26 Copper electrode leads 17, 18, 27, 28 Electrode terminals 19, 29 Platinum group catalyst 100, 200 Porous heating element 300, 600 with catalytic function Heating element accommodating device 312 Partition 310 Housing 313,613 Heat-resistant insulating material 301-306 Porous heating element bundle 400 with catalyst function 400 Heat exchanger 500 Blower 601-610 Porous heating element bundle with catalyst function

Claims (7)

Aluminum powder 30 to 50 wt%, graphite powder 5 to 10 wt%, clay powder 30 to 50 wt%, wood powder 0 to 10 wt% mixed with a sintering raw material mixture, and the entire sintering raw material mixture, Add water and / or binder 0-25 wt% that does not move due to the difference in specific gravity, knead, shape by applying pressure, sinter it and have voids in the range of 5-50%, When energized, a porous resistance molded body having a positive resistance temperature characteristic in which the resistance value is low at room temperature and the resistance value increases rapidly when the temperature rises to a predetermined temperature;
An electrode formed by spraying metal on both sides of the porous resistance molded body;
A platinum group catalyst dissolved in an inorganic solvent and / or an organic solvent supported on the porous resistance molded body;
A heating element housing device comprising a housing for housing the porous resistance molded body and the electrode and the platinum group catalyst integrally;
Heat energy is supplied to the air to be purified supplied to the housing of the heating element housing device until high temperature purified air is introduced from the housing of the heating element housing device and the purified air is discharged. An air purification device comprising:   The air purifier according to claim 1, wherein the heat exchanger further includes a blower that sucks air purified from the heat exchanger or supplies air to be purified to the heat exchanger. apparatus.   The heat exchanger includes a plurality of heat generator housing devices, and the air flow for heat exchange in the heat exchanger is heat exchange between the purified air flow and the air flow to be purified. The air purifier according to claim 1 or 2, wherein the air purifier is set.   The heat exchanger includes a plurality of heat generator housing devices, and the air flow for heat exchange in the heat exchanger is configured to exchange heat between the purified air flow and the air flow to be purified. The air purification device according to any one of claims 1 to 3, wherein the air purification device is set as heat exchange between the atmosphere and the purified air flow or between the atmosphere and the air flow to be purified.   The purification apparatus according to any one of claims 1 and 4, wherein the sintered raw material mixture is further mixed with 5 to 10 wt% of metal silicon powder and 0 to 10 wt% of iron powder.   2. The platinum group catalyst according to claim 1, wherein the platinum group catalyst has a single alloy composed of a combination including palladium and platinum, palladium and silver, palladium and ruthenium, palladium and rhodium, or a two-layer structure including palladium. The air purification apparatus as described in any one of Claim 5.   The platinum group catalyst is blended with ethanol 40-50 wt%, normal propyl alcohol 5-10 wt%, palladium 5 wt% or less, methanol 0.5-3 wt%, dispersion resin 0.5 wt% or less, and the remainder as water. The air purifier according to any one of claims 1 to 5.

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