JP2009213759A - Kitchen air cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kitchen air cleaning apparatus capable of achieving space saving while securing excellent cleaning efficiency, permitting easy maintenance and management, and capable of suppressing the maintenance cost. <P>SOLUTION: The kitchen air cleaning apparatus sucks contaminated air generated from the cooking of foodstuffs using an electric cooker from an air intake, cleans the contaminated air, and discharges the cleaned air from an air outlet. The kitchen air cleaning apparatus has an inorganic porous filter and a deodorant filter which are disposed in the order from the upstream side in a pathway communicating with the air intake and the air outlet. The inorganic porous filter has hygroscopic property, oil adsorptive property and hydrophilic gas adsorptive property. The deodorant filter has hydrophobic gas adsorptive property. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a kitchen air purifier. More specifically, the present invention relates to a kitchen air purification apparatus that can exhibit excellent purification efficiency with a simple structure.

  Conventionally, gas cooking heaters such as a gas stove have been used for cooking food in a kitchen. However, this gas-fired heating appliance generates carbon dioxide and other combustion gases by cooking the ingredients, so it is necessary to discharge them outdoors using a large-volume ventilation fan so that they do not fill the room. was there.

  On the other hand, when an electric heater is used, combustion gas is not generated, and therefore, it is not always necessary to discharge the polluted air generated by cooking the food to the outdoors using a large-volume ventilation fan. And since the contaminated air in this case mainly contains oil mist, water vapor, and cooking odor (hydrophilic gas, hydrophobic gas), after removing these to purify the contaminated air, again An indoor circulation type air purification device for kitchen (hereinafter sometimes simply referred to as “purification device”) that discharges indoors has been used (see Patent Document 1).

  FIG. 12 is a schematic cross-sectional view for explaining one embodiment of a conventional purification device 1. As shown in FIG. 12, the conventional purification device 1 includes at least an inlet 4, an oil filter 8, a cooler 9, a heater 10, a blower 7, a deodorizing filter 3, and an outlet 5 in an outer case 11. It has the structure which it has, and purifies polluted air as follows. First, the polluted air generated by cooking with the electric heating appliance 12 of the food and rising above the cooking appliance 13 is sucked by the negative pressure obtained from the blower 7 and sucked into the purifier 1 from the suction port 4. A wire net-like oil filter 8 is disposed in the suction port 4, and contaminated air is passed through the oil filter 8 to remove oil mist. Next, the contaminated air that has passed through the oil filter 8 is forcibly cooled by the cooler 9 to condense water vapor contained in the contaminated air. Thereby, the water | moisture content in contaminated air adheres to the surface of the cooler 9, and is removed. Furthermore, after the dehumidified contaminated air is heated and dried by the heater 10 to reduce the relative humidity of the contaminated air, it is passed through the deodorizing filter 3 using activated carbon or the like to adsorb and remove the cooking odor. And the contaminated air purified in this way is discharged | emitted indoors through the blower outlet 5. FIG. Further, the oil mist and moisture that have been attached and removed are respectively stored in a dedicated tray and discarded, and the cooking odor that has been removed by adsorption is discarded by replacing the filter.

  However, when the contaminated air is purified by the method as described above, there are the following problems. That is, separate purification means such as an oil filter, a cooler, and a deodorizing filter are required to remove oil mist, water vapor and cooking odor from contaminated air. Moreover, in order to fully exhibit the adsorption | suction capability of a deodorizing filter, it was necessary to arrange | position a heater and to heat and dry contaminated air. For this reason, the purification apparatus becomes excessive, and there is a problem that not only a large installation cost is required, but also the space that can be used for storage and the layout of the kitchen are limited. In addition, in such a conventional purification device, maintenance such as the above-described devices such as a cooler and a heater, an oil filter, and individual disposal of removed pollutants is also difficult. In addition, maintenance costs such as electric power generated by the use of each device were also borne. In addition, activated carbon is widely used for deodorizing filters used for gas adsorption, but activated carbon is excellent in hydrophobic gas adsorption, but hydrophilic gas adsorption is inferior. A conventional purification device using a deodorizing filter cannot cope with every cooking odor.

  In order to solve such a problem, Patent Document 2 proposes that a purifier be installed inside the wall facing the kitchen, and Patent Document 3 includes an electric heating device. It has been proposed to install a purification device integrally with the cabinet in the cabinet (see FIG. 13). These proposals devise the position where the purification device is installed and the arrangement method of each component of the purification device, and the whole kitchen is smart even though it is a purification device that purifies contaminated air by the method described above. It is possible to make it look like.

  However, none of the proposals change the means for purifying the polluted air, so when trying to demonstrate sufficient purification performance, the purification device itself must be large, and space saving is achieved. There was a limit to doing it. For this reason, in the purification apparatus proposed in Patent Document 2, a large-scale installation work is required for installation in the wall, and on the other hand, the installation location of the purification apparatus is limited, so that the layout of the kitchen is required. There was also a problem that was limited. Moreover, in the purification apparatus proposed by patent document 3, there existed a problem in which the storage space in a cabinet was restrict | limited. Furthermore, since none of the purifying devices change the purifying means, there are still problems such as the above-described problems that require a large amount of maintenance and maintenance costs and various cooking odors cannot be purified. It was.

Japanese Utility Model Publication No. 9-196423 Japanese Patent Laid-Open No. 9-042730 JP 2005-283060 A

  Accordingly, an object of the present invention is to provide a kitchen air purifying apparatus that can achieve space saving while ensuring excellent purification efficiency, and that is easy to maintain and suppress maintenance costs. It is in.

  The above object is achieved by the present invention described below. That is, the present invention is a kitchen air purifying apparatus that sucks contaminated air generated by cooking of ingredients using an electric heating appliance from a suction port, purifies it, and discharges it from the blow outlet. In the passage communicating with the outlet, an inorganic porous filter having a hygroscopic property, an oil adsorbing property and a hydrophilic gas adsorbing property, and a deodorizing filter having a hydrophobic gas adsorbing property are sequentially arranged from the upstream side. This is a kitchen air purification apparatus.

  Further, the kitchen air purification apparatus of the present invention is an inorganic porous filter in which rod-shaped bodies formed of a molding material containing an inorganic porous material are aggregated, and the rod-shaped bodies cross each other. And having a large number of contacts in contact with each other, and having a three-dimensional structure in which these contacts are scattered in a three-dimensional space and a gap is formed around each contact. Is preferred. In this embodiment, the inorganic porous filter is particularly preferably in the following form. The first is a form in which the rod-shaped body has a curved shape having a continuous straight portion, and the curve is folded back regularly or irregularly to form a three-dimensional structure, and the second is the shape of the rod The body has a curved or linear shape, and a plurality of the rod-like bodies are stacked in an irregular state to form a three-dimensional structure. Third, the rod-like body is a straight or curved shape A plurality of stripe layers having a configuration in which a plurality of the rod-shaped bodies are arranged on the same plane with gaps parallel to each other, and the stripe layers constitute each stripe layer. This is a form in which the rod-shaped bodies to be stacked are stacked so as to cross each other to form a three-dimensional structure. Moreover, the air purification apparatus for kitchens of this invention can also be made into embodiment in which the inorganic porous filter is formed of the aggregate | assembly of inorganic porous material particles.

In the kitchen air purification apparatus of the present invention, the inorganic porous material is a siliceous shale having an average pore radius of 2 to 8 nm, a specific surface area of 80 m ² / g or more, and a maximum moisture absorption of 15% or more. Moreover, it is preferable that a deodorizing filter is what contains activated carbon. Furthermore, it is preferable that the air purification apparatus for kitchen of this invention arrange | positions the nonwoven fabric filter for removing a coarse particle in the opening surface of a suction inlet.

  According to the present invention, it is possible to provide a kitchen air purifying apparatus that can realize space saving while ensuring excellent purification efficiency, and that is easy to maintain and suppress maintenance costs.

  More specifically, the purification apparatus of the present invention uses an inorganic porous material having excellent oil adsorptivity, hygroscopicity, and gas adsorptivity (especially hydrophilic gas adsorptivity). Since an inorganic porous filter formed in a structure that greatly improves is arranged, like a conventional purification device, a wire mesh oil filter, a cooler for dehumidification, heat drying after dehumidification It is not necessary to separately arrange a heater and a deodorizing filter for performing, and it is possible to realize a significant space saving as compared with the conventional purification device while ensuring the purification efficiency. In addition, the purification device of the present invention has a deodorizing filter, such as an activated carbon filter, particularly excellent in hydrophobic gas adsorption, disposed downstream of an inorganic porous filter excellent in gas adsorption (especially hydrophilic gas adsorption). Because of this configuration, it is possible to purify all cooking odors generated by cooking the ingredients using an electric heater. Moreover, since the purification apparatus of this invention purifies polluted air using a filter in this way, use of the apparatus which consumes electric power can be suppressed to minimum necessary, and a maintenance cost can be reduced. Furthermore, the purification apparatus of the present invention can be easily maintained and managed simply by replacing the filter.

Below, the purification apparatus of this invention is demonstrated in detail.
The purification apparatus of the present invention is an apparatus for purifying contaminated air that is installed in a kitchen and is generated by cooking food using an electric heater, and is the same as a conventional circulation-type kitchen air purification apparatus. In this way, the contaminated air is sucked from the suction port, the purified air is purified, and the purified air is again discharged into the room from the outlet.

  FIG. 1 is a schematic diagram for explaining the configuration of the purification device 1 of the present invention. As shown in FIG. 1, the purification device 1 of the present invention is characterized in that an inorganic porous filter 2 having a hygroscopic property, an oil adsorbing property and a hydrophilic gas adsorbing property is provided in a passage 6 communicating the suction port 4 and the air outlet 5. The deodorizing filter 3 having hydrophobic gas adsorptivity is arranged in order from the upstream side.

Here, the inorganic porous filter used in the present invention refers to a filter containing or supporting an inorganic porous material on a substrate. The inorganic porous material refers to an inorganic material having innumerable fine pores inside. Specific examples include diatomaceous mudstone, siliceous shale, allophane, imogolite, sepiolite, and zeolite. It is known that such an inorganic porous material has excellent hygroscopicity, and is also excellent in gas adsorbing property (particularly hydrophilic gas adsorbing property) and oil mist adsorbing property. In particular, in the present invention, an inorganic porous material having an average pore radius of 2 nm to 8 nm, a BET specific surface area by a nitrogen method of 80 m ² / g or more, and a maximum moisture absorption rate of 15% or more is preferable. An inorganic porous material having heat resistance up to is more preferable. Examples of such inorganic porous material include siliceous shale produced in Hokkaido. This siliceous shale has particularly excellent hygroscopicity (especially having high hygroscopicity in a high humidity region), gas adsorbing property and oil adsorbing property compared to other inorganic porous materials. Furthermore, it has a heat resistance of 900 ° C. or higher. Therefore, when such a siliceous shale is used, the purification efficiency of the inorganic porous filter becomes more excellent, so that the effect obtained by the purification apparatus of the present invention can be exhibited more effectively. In addition, the high heat resistance of 900 ° C. or higher enables regeneration of the inorganic porous filter by firing. Further, the siliceous shale may be one in which an alkali compound such as a hydroxide, carbonate or silicate of an alkali metal or alkaline earth metal is supported in the pores. Can be further enhanced.

  The “maximum moisture absorption rate” in the claims and the specification of the present invention means the mass of an object to be measured after being placed in a constant temperature and humidity chamber of 40 ° C. and 0% relative humidity for 72 hours. Then, the mass increase rate calculated from the mass of the object to be measured again after being placed in a constant temperature and humidity chamber of 25 ° C. and a relative humidity of 95% for 48 hours.

  The inorganic porous material having such a function is preferably contained within the range of 20 to 90% by mass in the inorganic porous filter. By setting it within this range, it is possible to ensure the strength and purification efficiency of the inorganic porous filter at a high level, and thus it can be suitably used for the purification device of the present invention. A more preferable content of the inorganic porous material is in the range of 60 to 80% by mass.

  The inorganic porous filter described above is particularly excellent in hydrophilic gas adsorptivity, while hydrophobic gas adsorptivity may not be sufficiently obtained. For this reason, in the purification apparatus of this invention, the deodorizing filter which has hydrophobic gas adsorption property is arrange | positioned in the downstream of an inorganic porous filter. Thereby, it becomes possible to adsorb and remove all kinds of gases. Here, as the deodorizing filter used in the present invention, any conventionally known deodorizing filter can be used as long as it has hydrophobic gas adsorptivity, but in the present invention, it contains charcoal such as activated carbon, Bincho charcoal or charcoal. It is preferable to use a filter that has been prepared. More preferably, it is a filter made of activated carbon or a filter containing or supported on activated carbon, that is, an activated carbon filter. The activated carbon filter may further carry alginic acid, calcium oxide, various catalysts, or the like.

  Contaminated air when cooking ingredients are cooked using an electric heater mainly contains oil mist, water vapor, and cooking odor (hydrophobic gas, hydrophilic gas). Oil mist, water vapor, and cooking odor (especially hydrophilic gas) are adsorbed and removed by an inorganic porous filter arranged on the upstream side. At this time, since the inorganic porous filter adsorbs a large amount of moisture, the hydrophobic gas may not be sufficiently adsorbed due to the influence of moisture. In view of this, the hydrophobic gas remaining in the deodorizing filter disposed downstream is adsorbed and removed (see FIG. 1). Since the purifying device of the present invention is obtained by functionally separating the components adsorbed for each filter, the following effects are further obtained. That is, it is possible to suppress a decrease in hydrophobic gas adsorption caused by the attachment of the hydrophilic gas to the surface of the deodorizing filter, and the deodorizing filter can be used more efficiently and with a long life. Thus, the purification device of the present invention can effectively purify contaminated air with a simple configuration.

  Hereinafter, the inorganic porous filter used in the purification apparatus of the present invention will be described in detail. In the purification apparatus of the present invention, the form of the inorganic porous filter that can be preferably used is a collection of rod-shaped bodies formed of a molding material containing an inorganic porous material, and the rod-shaped bodies cross each other. It has a large number of contacts in contact with each other, and has a three-dimensional structure in which these contacts are scattered in a three-dimensional space and a gap is formed around each contact. In this inorganic porous filter, the filter inner surface wind speed is preferably adjusted within the range of 0.1 to 5.0 m / s, preferably 1.0 to 5.0 m / s. It is preferable that the volume ratio of the filter is adjusted within a range of 30 to 80%.

  Since the inorganic porous filter 2 having such a structure has gaps in all directions, for example, up, down, left, and right, as shown in FIGS. 4 to 6, the contaminated air passing through the inorganic porous filter By disturbing the flow, it is possible to increase the chance of contact between the contaminated air and the surface of the rod-shaped body 2A, and it is possible to exhibit extremely excellent purification efficiency. Moreover, although the inorganic porous filter 2 having such a structure is excellent in purification efficiency, the ventilation resistance in the inorganic porous filter 2 can be kept low. Therefore, the purification apparatus of the present invention in which the inorganic porous filter having such a structure is arranged can adsorb and remove oil mist, water vapor, and gas contained in the contaminated air with a higher removal rate. Furthermore, the excellent air permeability of this inorganic porous filter makes it possible to reduce the size of the blower disposed in the purification device to the minimum necessary size.

  The rod-shaped body of the inorganic porous filter having such a structure may be either a linear shape or a curved shape, and the cross-sectional shape thereof may be, for example, a circular shape or a square shape. Preferably, it is a rod-shaped body having a circular cross section that has a high specific surface area and can improve the purification efficiency of contaminated air. The thickness of the rod-like body (diameter in the case of a circular cross section) is not particularly limited, but is preferably in the range of 0.5 mm to 10 mm. By setting the thickness (diameter) of the rod-shaped body within this range, it is possible to obtain a small inorganic porous filter with excellent productivity while having excellent purification efficiency with a fine structure. A more preferable thickness of the rod-shaped body is within a range of 0.7 mm to 3 mm.

  The inorganic porous filter having the above structure is particularly preferably in the following form. The first preferred form of the inorganic porous filter having the above structure is that the rod-shaped body has a curved shape having a continuous straight portion, and the curved line is regularly or irregularly folded to form a three-dimensional structure. It is the form which is doing. Specifically, as shown in FIG. 4, it has a shape like solid instant noodles. For example, the molding material is continuously extruded into a rod shape, and the obtained rod-shaped body is used as a receiver of the rod-shaped body. It can be obtained by filling the container while moving. In addition, the extruded continuous rod-shaped body can be once stirred in the liquid medium and then filled into the container. In this case, the rod-shaped body can be entangled in a more complicated manner. As the container used here, for example, a breathable container such as a wire mesh can be used. In this case, the porous porous filter can be used while the rod-shaped body is filled in the breathable container. Further, as will be described later, after the rod-like body is fired and solidified to be integrated, a product obtained by taking it out from the container may be used as the inorganic porous filter. The inorganic porous filter thus obtained is extremely productive.

  A second preferred embodiment of the inorganic porous filter having the above structure is that the rod-shaped body has a curved or linear shape, and a plurality of the rod-shaped bodies are stacked in an irregular state to form a three-dimensional structure. It is the form which is doing. That is, as shown in FIG. 5, a plurality of discontinuous rod-like bodies 2A are formed so as to have appropriate air permeability. Moreover, it is preferable that each rod-shaped body has a curved shape in a part so that an appropriate gap can be easily formed in the filter, and it is preferable that the rod-shaped bodies are irregular. Moreover, the inorganic porous filter of this form is formed by, for example, extruding a molding material and further filling a gas-permeable container with a rod-shaped body obtained by cutting into a length of 10 mm to 100 mm, or It can be obtained by solidifying by baking or applying an adhesive.

  According to a third preferred embodiment of the inorganic porous filter having the structure described above, the rod-shaped body has a straight or curved shape, and a plurality of the rod-shaped bodies are arranged on the same plane with gaps parallel to each other. The stripe layer has a plurality of stripe layers having the structure formed as described above, and the stripe layers are stacked in a state where the rod-like bodies constituting each stripe layer cross each other to form a three-dimensional structure.

  Hereinafter, this third preferred embodiment will be described in more detail. The length of the rod-shaped body in this form is not particularly limited, but is preferably 5 mm to 500 mm. The stripe layer has a configuration in which a plurality of such rod-like bodies are arranged in parallel to each other through a gap on the same plane. Further, as shown in FIG. 10, the stripe layer 2B has a structure in which the respective rod-shaped bodies 2A constituting the stripe layer 2B are connected and integrated at at least one end thereof, preferably at both end portions thereof. May be. Thus, when it is set as the stripe layer of the structure which each rod-shaped body was connected and integrated, as mentioned later, productivity of an inorganic porous filter can be made more excellent and it can be made low-cost. That is, it is possible to further reduce the maintenance cost of the purification device. In addition, the portion for integrally connecting each rod-shaped body may be formed wider than each rod-shaped body to facilitate the molding process, and the structure is integrally coupled at both ends of each rod-shaped body. When the stripe layer is used, the rod-like bodies located at both ends of the rod-like bodies constituting the stripe layer may be wider than the other rod-like bodies (see FIG. 10). By forming in this way, only these wide portions can be fixed, and an inorganic porous filter can be obtained more easily.

  Moreover, it is preferable that each of the distance between the adjacent rod-shaped bodies which comprise each stripe layer exists in the range of 0.5 mm-20 mm. When this distance is less than 0.5 mm, the ventilation resistance in the inorganic porous filter may be increased. On the other hand, when it exceeds 20 mm, the purification efficiency of the inorganic porous filter may be reduced. In the purification apparatus of the present invention, a more preferable distance between the rod-shaped bodies is in a range of 0.7 mm to 5 mm. In each stripe layer, the number of rod-like bodies arranged on the same plane is preferably in the range of 5 to 100/100 mm.

  Further, each of the distances between the adjacent rod-shaped bodies constituting each stripe layer may be equal width or non-equal width. When the width is equal, it is easy to adjust the ventilation resistance in the inorganic porous filter to an appropriate state, and when the width is not equal, the contaminated air passing through the inorganic porous filter is convected more complicatedly, The residence time of contaminated air can be made longer.

  The stripe layers having such a configuration are laminated so that the rod-shaped bodies of adjacent stripe layers are not parallel to each other, that is, so as to form a gap around each contact point of the rod-shaped body. In the purification apparatus of the present invention, it is preferable that the inorganic porous filter of this embodiment is a laminate in which five or more stripe layers, in particular, 30 layers or more, and further 60 layers or more are laminated. On the other hand, when it exceeds 200 layers, the strength of the inorganic porous filter may be inferior, or the inorganic porous filter may become large, and the purification device may not be downsized. However, in the present invention, the number of rod-like bodies arranged and the number of stripe layers stacked in the inorganic porous filter of this embodiment are not limited to the above-mentioned ranges, and the amount of air passing through the inorganic porous filter What is necessary is just to set so that appropriate purification efficiency may be obtained according to environmental conditions, such as a flow velocity and the magnitude | size of a purification apparatus.

  In addition, as shown in FIG. 8 or FIG. 9, the inorganic porous filter 2 of the third embodiment includes the arrangement positions of the rod-like bodies 2A in a certain stripe layer and the rod-like bodies in the stripe layer two layers ahead of the arrangement. The structure may be shifted from the arrangement position of 2A. By using such an inorganic porous filter, it becomes possible to convection the contaminated air passing through the filter in a more complicated manner, to increase the residence time of the contaminated air, and to further improve the purification efficiency of the purification device. Is possible.

  Moreover, as shown in FIGS. 6 to 9, the adjacent stripe-shaped rods 2A of the adjacent stripe layers are not necessarily orthogonal to each other, and the adjacent stripe-shaped rods 2A of the adjacent stripe layers may be non-parallel to each other. . For example, the stripe layer 2A is adjusted by adjusting the angle between the rod-like body 2A of the stripe layer as a base and the rod-like body 2A of the stripe layer laminated adjacent to the stripe layer to be in the range of 5 degrees to 175 degrees. Can be laminated. On the other hand, when the angle exceeds 0 degree and is less than 5 degrees, or when the angle exceeds 175 degrees and is less than 180 degrees, the ventilation resistance may increase due to the overlap between the rods of adjacent stripe layers. There is.

  Also, as shown in FIG. 10, by forming protrusions 2C on at least one surface of each stripe layer 2B, as shown in FIG. 11, adjacent stripe layers have a gap due to the protrusion 2C between their outermost surfaces. It is also possible to adopt a form adjacent to each other in a state in which the is formed. By adopting such a form, it becomes possible to convection the contaminated air passing through the inside of the inorganic porous filter more complicatedly, to make the residence time of the polluted air longer, and to a purification device having better purification efficiency It becomes possible to do. The gap formed between the stripe layers 2B is preferably 2.0 mm or less (see FIG. 11).

  Moreover, the form of the inorganic porous filter that can be used in the purification apparatus of the present invention may have a structure formed by an aggregate of inorganic porous material particles. Here, the inorganic porous material particles include particles formed by extruding a particle made of an inorganic porous raw material or a molding material containing the inorganic porous material, and granulated into particles. This form of the inorganic porous filter can be obtained by spreading particles in a breathable container. Further, the inorganic porous filter may be in other forms, and any inorganic porous filter can be used in the present invention as long as it contains the above-described inorganic porous material.

  The inorganic porous filter molding material used in the present invention may contain the following as a binder component. Examples thereof include clay minerals such as bentonite, Miraclay, Minamata clay, Kibushi clay, Sasame clay or activated clay, hydraulic materials such as cement, or synthetic resins such as nylon resin and polypropylene resin. Of these, clay minerals that are originally contained in inorganic porous materials obtained from natural minerals may be used as they are. In this case, the compounding quantity of the binder component contained in a molding material can be made into the range of 10-80 mass% in conversion of solid content in a molding material, for example. When the blending amount of the binder component is less than 10% by mass, a durable inorganic porous filter may not be obtained. On the other hand, when it exceeds 80% by mass, the function of the inorganic porous material is hindered. There is a case. The inorganic porous filter can be fired and solidified by containing a clay mineral, so that molded bodies such as rods or particles can be fixed to each other and integrated. Moreover, these molded bodies can be integrated by filling a gas-permeable container such as a wire mesh. Of course, in this case, the rod-shaped body may be fired and solidified. Furthermore, these may be integrated by applying an emulsion adhesive such as vinyl acetate resin, ethylene-vinyl acetate resin, or acrylic resin to the surface of these molded bodies.

  In addition to the above, the inorganic porous filter used in the present invention can support or contain various functional materials on rods or particles. For example, by supporting natto and / or soil fungi on these surfaces, it is possible to decompose the oil adsorbed by them and obtain an inorganic porous filter that can be used for a longer period of time. Further, by supporting or containing titanium oxide on these surfaces, it is possible to impart a photocatalytic function to the inorganic porous filter. In this case, it is preferable to dispose an ultraviolet lamp for activating the photocatalyst in the purification device. Moreover, the inorganic porous filter can carry | support or contain the microcapsule which includes a normal paraffin in a molding material. Since the microcapsules enclosing the normal paraffin have a latent heat storage function utilizing solid-liquid phase change, it is possible to suppress a rapid temperature change of the inorganic porous filter. In other words, when used to purify high-temperature contaminated air, rapid heat generation of the inorganic porous filter can be suppressed, and the temperature of the contaminated air passing through the inorganic porous filter is controlled to a low temperature accordingly. Efficiency can be further improved. The content of the microcapsules enclosing the normal paraffin in the molding material is preferably in the range of 1.0 to 10% by mass in terms of solid content.

  In addition, the inorganic porous filter may contain other various additives in addition to the inorganic porous material or the binder component and the functional material described above in the base material. For example, a reinforcing agent, a dispersing agent, a bulking agent, a coloring agent, or the like can be contained.

  There is no restriction | limiting in particular about the method of manufacturing the inorganic porous filter used for this invention, For example, in addition to having demonstrated above, various methods can be used. In the case of producing an inorganic porous filter having a configuration in which a stripe layer 2B having a structure in which at least one end of each rod-like body 2A is connected and integrated as shown in FIG. 10 is laminated, It can be manufactured by the following method. First, a molding material containing an inorganic porous material and a binder component is press-molded using a mold capable of obtaining a stripe layer having this configuration, thereby producing a plurality of stripe layers. Alternatively, the stripe layer may be produced by forming a molding material into a flat plate shape and then punching it so as to obtain the stripe layer having the above configuration. Next, after laminating the obtained stripe layers, the laminated stripe layers are fixed by solidifying the binder component to obtain an inorganic porous filter.

  Moreover, in the case of manufacturing an inorganic porous filter having a configuration in which stripes having a configuration in which each rod-like body 2A is not integrally connected at the end thereof as shown in FIGS. It is possible to manufacture by this method. First, a molding material containing an inorganic porous material and a binder component is extruded into a rod shape and cut into a predetermined size to produce a plurality of rod-shaped bodies. Next, the plurality of rod-like bodies obtained are arranged to produce a plurality of stripe layers. Then, after laminating the obtained stripe layer, the laminated stripe layers are fixed by solidifying the binder component to obtain an inorganic porous filter.

  In these inorganic porous filter manufacturing methods, there are no particular limitations on the apparatus and method for press molding, stamping or extrusion molding, and conventionally known apparatuses and methods can be appropriately selected and used. Also, there is no particular limitation on the apparatus and method for granulating the inorganic porous material. Further, the shape of the die of the extrusion die used when obtaining the rod-shaped body by extrusion molding can be appropriately adjusted depending on the desired cross-sectional shape of the rod-shaped body. In this case, the number of die in the extrusion die may be one or plural.

  Moreover, in the method of manufacturing an inorganic porous filter as shown in FIGS. 6-9 using extrusion molding, the method of arranging a some rod-shaped body and obtaining a stripe layer, The method of laminating the obtained stripe layer Although there is no restriction | limiting in particular, For example, the following methods can be used. For example, by extruding a rod-shaped body using an extrusion die having a base corresponding to the number of rod-shaped bodies arranged per layer, a stripe layer in which these are arranged in parallel on the same plane is obtained. Next, the height of the stage on which the obtained stripe layer is placed is rotated by a predetermined angle. Thereafter, extrusion molding is resumed, and a new stripe layer is laminated on the stripe layer obtained earlier. This series of operations is repeated, and the stripe layers are sequentially stacked. Besides this method, a plurality of rods extruded one by one may be arranged to form a stripe layer, and the obtained stripe layer may be laminated, but in this case, the productivity may be inferior. . In addition, after laminating | stacking a predetermined number of stripe layers, you may provide the pressure for sticking each stripe layer as needed.

  Further, in the method for producing the inorganic porous filter, the method for solidifying the molded body (particles, rod-shaped body, stripe layer) of the unsolidified molding material is not particularly limited, and may be appropriately changed depending on the type of binder component used. can do. For example, when a clay mineral is used as the binder component, the rod-shaped body can be fired and solidified, or the rod-shaped body can be solidified by utilizing the self-hardness of the clay mineral. For example, when a molding material containing siliceous shale and clay mineral is used, it is preferably fired within a temperature range of 700 to 950 ° C. Moreover, when using a hydraulic material as a binder component, a rod-shaped body can be solidified by hydration hardening. Moreover, when using a synthetic resin as a binder component, a rod-shaped body can be solidified by cooling. Moreover, you may provide a drying process before solidifying as needed.

  The method for manufacturing the inorganic porous filter described above may include other steps in addition to the steps described above. For example, a step of cutting the obtained inorganic porous filter to have a desired size, a step of supporting a functional material, and the like can be included.

  The orientation of the inorganic porous filter obtained in this manner is not particularly limited in the direction in which the inorganic porous filter is disposed in the passage that connects the suction port and the outlet of the purification device, but the surface of the stripe layer faces the ventilation direction. It is preferable to arrange in such a manner. The size of the inorganic porous filter is appropriately adjusted according to the size of the passage in the purification device and the necessary purification performance. Furthermore, the inorganic porous filter having the above-described structure may be attached to the side surface with a frame material adapted to the sectional shape of the passage. In addition, the number of inorganic porous filters disposed in the passage may be one or two or more, and can be appropriately changed according to the required purification performance. In the present invention, when the adsorption capability of such an inorganic porous filter reaches a saturated state, the purification capability of the purification device can be easily maintained by replacing it with a new one.

  Hereinafter, the form of the deodorizing filter used for this invention is demonstrated. In the present invention, the form of the deodorizing filter is not particularly limited, and may be any conventionally known form. An example of the activated carbon filter is as follows: a honeycomb activated carbon filter in which activated carbon is supported on a honeycomb substrate, a felt activated carbon filter in which activated carbon is supported on a felt substrate, and a nonwoven fabric folded in a pleat shape. A pleated activated carbon filter in which activated carbon is supported on a base material can be used. In addition, a granular activated carbon filter in which activated carbon particles are spread in a breathable container may be used, and further, a structure similar to the above-described inorganic porous filter may be formed.

  In the purification device of the present invention, the size of the deodorizing filter can be adjusted according to the required adsorption capacity of the hydrophobic gas, and is required by arranging a plurality of deodorizing filters. You may satisfy | fill the adsorption | suction capability of hydrophobic gas. In the present invention, when the adsorption capacity of such a deodorizing filter reaches a saturated state, the purification capacity of the hydrophobic gas can be easily maintained by replacing it with a new one.

  As described above, the purification device of the present invention can be freely designed as long as the inorganic porous filter and the deodorizing filter are arranged in this order from the upstream side. Therefore, materials other than the inorganic porous filter and the deodorizing filter, such as the suction port, the air outlet, the blower, and the outer case, can adopt the same material and structure as those of the conventional purification device, and suitable ones are appropriately used. It can be selected and used.

  Moreover, the purification apparatus of the present invention can be freely designed with respect to its installation position and appearance. That is, the present invention can be applied to any type of purification device known in the art. The purification device of the present invention can realize space saving while ensuring excellent purification efficiency when applied to any conventional type of purification device. Below, it demonstrates using the specific embodiment of the purification apparatus of this invention.

  FIG. 2 is a schematic cross-sectional view showing an embodiment of the purification device 1 of the present invention. According to the embodiment shown in FIG. 2, first, the contaminated air generated using the electric heater 12 is sucked into the purification device 1 from the suction port 4. At this time, the blower 7 is used to efficiently suck contaminated air into the purification device 1. Moreover, the nonwoven fabric filter (not shown) for removing the coarse particle contained in contaminated air may be arrange | positioned at the suction inlet 4. FIG. The contaminated air sucked into the purification device 1 then passes through the inorganic porous filter 2 having the above-described structure, whereby oil mist, water vapor, gas (especially in the contaminated air) , Hydrophilic gas) with high removal efficiency. The contaminated air that has passed through the inorganic porous filter 2 further passes through the deodorizing filter 3, whereby the hydrophobic gas remaining in the contaminated air is adsorbed and removed, and the contaminated air is purified. The purified contaminated air is discharged again from the blowout port 5 into the room. Thus, the purification apparatus of the present invention can greatly simplify the structure of the purification apparatus as compared with the conventional purification apparatus shown in FIG. 12 described above.

  FIG. 3 is a schematic cross-sectional view showing another embodiment of the purification device of the present invention. Also in the embodiment shown in FIG. 3, the contaminated air generated by cooking the food using the electric heating appliance 12 is sucked from the suction port 4 and purified by passing it through the inorganic porous filter 2 and the deodorizing filter 3. And it becomes the structure discharged | emitted from the blower outlet 5. FIG. FIG. 13 is a schematic cross-sectional view showing an embodiment of the conventional purification device 1, which is of the same type as the embodiment shown in FIG. As shown in FIGS. 3 and 13, the purification device of the present invention can greatly simplify its structure even when applied to such a type of purification device.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated further more concretely, unless the summary is exceeded, this invention is not limited by the following Example.

<Preparation of inorganic porous filter>
(Inorganic porous filter 1)
As a molding material, 80% by mass of siliceous shale of Hokkaido Wakkanai Formation and 20% by mass of clay mineral (specific surface area 40.8 m ² / g) were used. After these molding materials are mixed and wet pulverized, a rod-shaped body having a circular cross section with a diameter of 1 mm is continuously extruded using a vacuum extrusion molding machine, and the rod-shaped body is folded back to be 50 mm long × 50 mm wide × An inorganic porous filter 1 was produced by filling a wire mesh container having a length of 150 mm and baking and solidifying the container at 850 ° C. In addition, the filling amount of the rod-shaped body in the obtained inorganic porous filter 1 was adjusted so that the differential pressure measured by the method mentioned later may be 42 Pa, and the filled rod-shaped body was 130 g.

  In addition, the differential pressure of the inorganic porous filter is determined by placing the pressure of the suction port and the pressure of the air outlet after the inorganic porous filter 1 is arranged in a passage made of a stainless steel tube (length 50 mm × width 50 mm × length 150 mm). Each was measured by a manometer and obtained by calculating from the obtained actual measurement values.

(Inorganic porous filter 2)
As the molding material, 80% by mass of siliceous shale in the Wakkanai layer of Hokkaido and 20% by mass of clay mineral (specific surface area 40.8 m ² / g) were used. These molding materials are mixed and wet pulverized, then extruded using a vacuum extruder, cut to a length of 30 mm to 50 mm, and then fired and solidified at 850 ° C. to form a rod-shaped body. Was made. The obtained rod-shaped body has a curved shape or a straight shape, and has a circular cross section with a diameter of 1 mm. These rod-shaped bodies were filled into a wire mesh container having a length of 50 mm, a width of 50 mm, and a length of 150 mm to produce an inorganic porous filter 2. In addition, the filling amount of the rod-shaped body in the obtained inorganic porous filter 2 was adjusted so that the differential pressure measured by the method similar to the above was 42 Pa, and the filled rod-shaped body was 128.7 g. .

(Inorganic porous filter 3)
As the molding material, 70% by mass of clayey siliceous shale (15% by mass of clay mineral, 85% by mass of siliceous shale) and 30% by mass of Minamata clay in the Wakkanai Wakkanai Formation were used. These molding materials were mixed and wet pulverized, and then molded using a press molding machine to obtain a striped layer molded body as shown in FIG. Here, the upper and lower molds used in the press molding are cylindrical rods having a diameter of 1 mm and a length of 45 mm (however, the rods located at both ends are a rectangular parallelepiped having a thickness of 1 mm, a width of 2.5 mm, and a length of 45 mm). 24) are arranged in parallel with an equal width through a gap of 1 mm, and further, a striped layer formed body in which both sides of each rod-shaped body are integrally coupled (each rod-shaped body is coupled). The portion to be used is a rectangular parallelepiped having a thickness of 1 mm, a width of 2.5 mm, and a length of 50 mm. Next, 150 stripes of the obtained stripe layer were laminated so that the rod-like bodies constituting the adjacent stripe layers were perpendicular to each other, and then these were dried and fired and solidified at 850 ° C. for 3 hours to obtain a rod-like body. The inorganic porous filter 3 was obtained by fixing them together.

  The obtained inorganic porous filter 3 has an overall size of 50 mm in length, 50 mm in width, and 150 mm in length. When the external appearance of the obtained inorganic porous filter 3 was confirmed visually, molding defects such as defects were not generated. Moreover, in the inorganic porous filter 3, when the differential pressure was measured by the same method as described above, it was 42 Pa.

<Deodorizing filter>
An activated carbon filter 1 having a length of 50 mm and a width of 50 mm in which activated carbon is supported by a clay-based binder on the surface of a nonwoven fabric substrate folded in a pleat shape was used.

<Purification device>
The inorganic porous filter 1 was placed in a passage made of a stainless steel pipe (length 50 mm × width 50 mm × length 150 mm) to obtain a purification device of Reference Example 1. Further, the inorganic porous filters 2 and 3 were also arranged in the same manner as described above to obtain the purification devices of Reference Examples 2 and 3, respectively. Moreover, the inorganic porous filter 1 and the activated carbon filter 1 were arrange | positioned in order from the upstream in the said channel | path, and the purification apparatus of Example 1 was obtained. A standard gas generator is disposed at the suction port of these purifiers, and a gas component or oil mist adjusted to a constant concentration is mixed with room air and sucked from the suction port. In addition, a sirocco fan (maximum air volume 150 m ³ / hr) is arranged at the outlet of the purification device, and the ventilation air volume in the measuring device is 1.0 to 2.5 m ³ / hr (surface in the purification filter). The wind speed is controlled to 0.1 to 0.24 m / s).

(Purification efficiency test)
・ Gas adsorption test (ammonia)
Contaminated air containing ammonia was passed through the purification devices of Reference Examples 1 to 3, respectively. The gas concentration (A1) at the suction port of the purifier and the gas concentration (B1) at the outlet were measured, and the ammonia purification efficiency ((A1-B1) / A1) was calculated. In addition, the density | concentration in the suction port of ammonia is adjusted to 15-20 ppm. Measurement is performed under low humidity conditions (temperature 25 ° C., relative humidity 20%, air flow rate 2.32 m ³ / hr) and high humidity conditions (temperature 25 ° C., relative humidity 70%, air flow rate 2.32 m ³ / hr). I went there. Under the low-humidity conditions, in all of the purification apparatuses of Reference Examples 1 to 3, the ammonia purification efficiency was 67% or more after 5 minutes, and the purification efficiency was maintained even after 1 hour. In addition, under the high humidity condition, in any of the purification apparatuses of Reference Examples 1 to 3, the ammonia purification efficiency ((A1-B1) / A1) was 70% or more after 5 minutes, and even after 1 hour. The purification efficiency was maintained.

・ Gas adsorption test (acetaldehyde)
Contaminated air containing acetaldehyde was passed through the purification devices of Reference Examples 1 to 3, respectively. The gas concentration (A2) at the suction port of the purification device and the gas concentration (B2) at the outlet were measured, and the purification efficiency of acetaldehyde ((A2-B2) / A2) was calculated. In addition, the density | concentration in the blower outlet of acetaldehyde is adjusted to 15-20 ppm. Measurement is performed under low humidity conditions (temperature 25 ° C., relative humidity 20%, air flow rate 2.32 m ³ / hr) and high humidity conditions (temperature 25 ° C., relative humidity 70%, air flow rate 2.32 m ³ / hr). I went there. Under low-humidity conditions, all of the purification devices of Reference Examples 1 to 3 have an acetaldehyde purification efficiency ((A2-B2) / A2) of 40% or more after 5 minutes, and the purification efficiency is 1 hour later. Maintained. Moreover, under the high-humidity conditions, all of the purification apparatuses of Reference Examples 1 to 3 have acetaldehyde purification efficiency ((A2-B2) / A2) of 60% or more after 5 minutes, and even after 1 hour. The purification efficiency was maintained.

-Oil mist adsorption test The filter paper which measured the weight was installed in the inner wall surface of the suction inlet and blower outlet of the purification apparatus of the reference examples 1-3, respectively. Next, 50 ml of salad oil is put into a 100 ml beaker and heated to about 160 ° C. with a hot stirrer. The polluted air containing the oil mist generated at this time was passed through the purifiers of Reference Examples 1 to 3 at an air volume of 2.2 m ³ / hr for 1 hour. Then, the filter paper installed in the suction inlet and the blower outlet was removed, these weights were measured, and the weight of the oil mist adhering to the filter paper was computed. The oil mist purification efficiency ((a1-b1) / a1) was calculated from the oil mist adhesion amount (a1) at the suction port of the purification device and the oil mist adhesion amount (b1) at the outlet. The test was performed under conditions of a temperature of 25 ° C. and a relative humidity of 30%. In any of the purification devices of Reference Examples 1 to 3, the oil mist purification efficiency ((a1-b1) / a1) was 70% or more.

・ Cooking odor adsorption test Odor generated by burning saury is collected in a gas bag using a pump, and a gas chromatograph mass spectrometer (Shimadzu Corporation, GCMS2010, DB-WAX, 100-160 ° C. (4 ° C./min. )) Qualitative analysis of odor components. Further, the odor collected in the gas bag was passed through the purifiers of Reference Examples 1 to 3, respectively, and then collected in the gas bag again. In the qualitative analysis performed before passing through the purification device, aldehydes were the most, followed by organic acids and alcohols, and further oils derived from fatty acids, whereas the purification devices of Reference Examples 1-3 were used. In the qualitative analysis performed after passing, no peaks of these odor components could be detected.

-Moisture adsorption test Each of the inorganic porous filters 1 to 3 was placed in a constant temperature and humidity chamber having a temperature of 25 ° C and a relative humidity of 50% for 48 hours, and then the mass was measured. Next, these were placed in a constant temperature and humidity chamber at a temperature of 25 ° C. and a relative humidity of 90% and held for 24 hours, and the mass was measured again. When the increase rate of the measured mass was calculated, the inorganic porous filters 1 to 3 all showed a mass increase of 10% or more.

(Long-term use test)
After the oil mist adsorption test described above, the pressures at the suction port and the outlet of the purifiers of Reference Examples 1 to 3 were measured with a manometer, and the differential pressures of the inorganic porous filters 1 to 3 were calculated. The differential pressure of each of the obtained inorganic porous filters 1 to 42 was 42 Pa, and there was no difference from the differential pressure of each inorganic porous filter before the oil mist adsorption test.

(Hydrophobic gas adsorption test)
Contaminated air containing methyl sulfide was passed through the purification device of Reference Example 1. The gas concentration (A3) at the suction port of the purification device and the gas concentration (B3) at the outlet were measured, and the purification efficiency of methyl sulfide ((A3-B3) / A3) was calculated. The concentration of methyl sulfide at the suction port is adjusted to 15 to 20 ppm. The measurement was performed under low humidity conditions (temperature 25 ° C., relative humidity 20%, aeration air volume 2.1 m ³ / hr). Under low humidity conditions, the purification efficiency ((A3-B3) / A3) of methyl sulfide of the purification apparatus of Reference Example 1 was about 20% after 30 minutes.

  Contaminated air containing methyl sulfide was passed through the purification apparatus of Example 1 by the same method as in the hydrophobic gas adsorption test described above. The purification efficiency of methyl sulfide ((A3-B3) / A3) was 75% after 30 minutes. That is, it was confirmed that the purification device of Example 1 has an improved hydrophobic gas adsorbing power compared to the purification device of Reference Example 1.

The schematic diagram for demonstrating the structure of the purification apparatus of this invention. The schematic sectional drawing which shows one Embodiment of the purification apparatus of this invention. The schematic sectional drawing which shows other embodiment of the purification apparatus of this invention. The perspective view which shows one Embodiment of an inorganic porous filter. The perspective view which shows other embodiment of an inorganic porous filter The front view which shows other embodiment of an inorganic porous filter. The partial top view of the inorganic porous filter shown in FIG. The front view which shows other embodiment of an inorganic porous filter. The partial top view of the inorganic porous filter shown in FIG. Explanatory drawing explaining the stripe layer which comprises an inorganic porous filter. The front view explaining other embodiment of an inorganic porous filter. The schematic sectional drawing which shows one Embodiment of the conventional purification apparatus. The schematic sectional drawing which shows other embodiment of the conventional purification apparatus.

Explanation of symbols

1: Kitchen air purification device 2: Inorganic porous filter 2A: Rod-like body 2B: Stripe layer 2C: Projection 2D: Container 3: Deodorizing filter 4: Suction port 5: Air outlet 6: Passage 7: Blower 8: Oil filter 9 : Cooler 10: Heater 11: Exterior case 12: Electric heating appliance 13: Cooking appliance 14: Cabinet 15: Wall

Claims (9)

  An air purification device for a kitchen that sucks contaminated air generated by cooking of ingredients using an electric heater from the suction port, purifies it, and discharges it from the blower outlet, in a passage that connects the suction port and the blower outlet An air purification device for a kitchen comprising an inorganic porous filter having hygroscopicity, oil adsorbing property and hydrophilic gas adsorbing property and a deodorizing filter having hydrophobic gas adsorbing property in order from the upstream side .   The inorganic porous filter is formed by assembling rod-shaped bodies formed of a molding material containing an inorganic porous material, and further has a number of contacts in a state where the rod-shaped bodies are in contact with each other. 2. The kitchen air purifier according to claim 1, wherein the air cleaner has a three-dimensional structure in which these contacts are scattered in a three-dimensional space and a gap is formed around each contact.   The kitchen air purification apparatus according to claim 2, wherein the rod-like body has a curved shape having a continuous straight portion, and the curved line is folded back regularly or irregularly to form a three-dimensional structure.   The kitchen air purification apparatus according to claim 2, wherein the rod-shaped body has a curved or linear shape, and a plurality of the rod-shaped bodies are stacked in an irregular state to form a three-dimensional structure.   The rod-shaped body has a straight or curved shape, and has a plurality of stripe layers having a configuration in which a plurality of the rod-shaped bodies are arranged on the same plane with gaps parallel to each other. The air purification apparatus for a kitchen according to claim 2, wherein the layers are stacked in a state in which rod-shaped bodies constituting each stripe layer cross each other to form a three-dimensional structure.   The kitchen air purification apparatus according to claim 1, wherein the inorganic porous filter is formed of an aggregate of inorganic porous material particles. The inorganic porous material is a siliceous shale having an average pore radius of 2 to 8 nm, a specific surface area of 80 m ² / g or more, and a maximum moisture absorption rate of 15% or more. Kitchen air purifier.   The air purification apparatus for kitchen according to any one of claims 1 to 7, wherein the deodorizing filter contains activated carbon.   Furthermore, the air purification apparatus for kitchens of any one of Claims 1-8 which arrange | positioned the nonwoven fabric filter for removing a coarse particle in the opening surface of a suction inlet.

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