JP2001227031A - Toilet deodorizing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the necessity of replacing a filter for cleaning indoor air by adsorbing an offensive smell component to an adsorbent such as an activated charcoal filter in a conventional toilet deodorizing machine as well as to eliminate the possibility of concentrating and redischarging a smell by separating without being oxidized and decomposed at heating regenerating time by a component of offensive smell gas while proposing a method of heating and regenerating an adsorbing part by periodically or nonperiodically carrying an electric current by adsorbing the offensive smell gas to a self-heating deodorizing catalyst at the normal temperature. SOLUTION: This toilet deodorizing machine is provided with an adsorbing part for forming an adsorbing layer on a surface of a metallic base material also serving as an adsorbing carrier and a heating element in a ventilating passage, a decomposing part including a catalytic heater for forming a catalyst layer on the surface of the metallic base material also serving as a catalyst carrier and the heating element and a ventilating means, and can regenerate the adsorbing part maintenance-free.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet deodorizer for purifying odor components generated from a toilet without maintenance.

[0002]

2. Description of the Related Art A conventional toilet deodorizer uses an adsorbent such as activated carbon or zeolite as a method for deodorizing odors generated during stool, but has not been recycled. In particular, activated carbon filters are generally widely used, but require regular replacement work, and activated carbon filters after adsorption saturation are disposable. In addition, a method of adsorbing and removing offensive odors using an adsorption-type oxidative decomposition catalyst has been proposed, but it is necessary to replace it with a new adsorbent after adsorption saturation. For example, JP-A-63-240923
Japanese Patent Application Publication No. JP-A-2003-177, discloses that various odors are adsorbed by a catalyst filter in which a platinum-based catalyst is supported on activated carbon, and when the adsorption capacity is reduced, the odor is removed from an air purifier and placed in an oven or the like.
Although a method for regenerating the deodorizing filter by heating at 0 ° C. for 10 to 30 minutes is disclosed, activated carbon has a risk of ignition when exposed to high temperatures. Also, as a deodorizing catalyst for vehicle air conditioning,
For example, in Japanese Patent Application Laid-Open No. 9-216928, an amorphous oxide of zinc oxide and silica, a hydrophobic zeolite having a silica / alumina ratio of 100 or more, and a self-heating type metal carrier having a heating portion that generates heat when energized are provided. Patent Document 1 discloses a deodorizing catalyst for vehicle air-conditioning in which an adsorbent layer made of a material is formed, and a catalyst component composed of manganese dioxide and copper oxide is supported on the surface thereof, and a method for regenerating the same. Japanese Unexamined Patent Publication No. Hei 10-80621 discloses a deodorizing apparatus and a deodorizing method for a public toilet. A deodorizing body is coated on a surface of a substrate processed into a corrugated shape that can be energized, and this is wound to form a corrugated structure. A method is disclosed in which a wiring connected to an AC power source is connected to the other end, and the substrate is heated by energization to regenerate the deodorant.

[0003]

However, the above-mentioned conventional apparatus is a system in which an odor component is adsorbed on an adsorbent such as activated carbon or zeolite and is discarded when the odor component is saturated, which is uneconomical. Further, a method of heating and regenerating a saturated adsorption catalyst has also been proposed, but there is a risk of ignition. Further, JP-A-9-216928 or JP-A-10-80621
Noxious odor gas is adsorbed at room temperature to a deodorizing catalyst in which an adsorbent layer of a specific composition and a specific catalyst component are carried on a self-heating type metal carrier such as the above, and the heating current is periodically or irregularly held in the same place Is applied to the heat-generating part and heated and regenerated at a regenerating temperature of 150 to 500 ° C. However, depending on the components of the odorous gas, it is released without being oxidized and decomposed during regenerating by heating, and the odor is concentrated and released again. Might be.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a suction unit including a suction heater having a suction layer formed on a surface of a metal base material serving also as an adsorption carrier and a heating element, in a ventilation path for sucking odor from the toilet. , A decomposition unit including a catalyst heater with a catalyst layer formed on the surface of a metal base material that also serves as a catalyst carrier and a heating element, and a ventilation means, usually adsorbs odorous gas in a single pass at room temperature, and heats and regenerates the adsorption unit Since the concentrated malodorous gas released from the adsorption section is sometimes oxidized and decomposed in the decomposition section, the deodorization capacity is extremely high, and the toilet deodorizer can easily and easily regenerate the adsorption section without maintenance.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 includes an adsorption heater in which an adsorption layer is formed on a surface of a metal base material which also functions as an adsorption carrier and a heating element, in a ventilation path for sucking odor from inside the toilet. An adsorbing section, a decomposition section including a catalyst heater in which a catalyst layer is formed on the surface of a metal substrate serving also as a catalyst carrier and a heating element, and a ventilation means are provided. At the same time, the air is adsorbed to the adsorption section at normal temperature. At the time of heating and regeneration of the adsorption section, the ventilation means is stopped, and the concentrated odor gas released from the adsorption section is oxidized and decomposed by the decomposition section. It is a toilet deodorizer that can be easily regenerated without maintenance.

According to a second aspect of the present invention, at least one selected from the group consisting of zeolite, silica gel, zinc oxide, titanium oxide and silicon oxide and a metal oxide catalyst or a noble metal catalyst are provided on the surface of the metal substrate in the adsorption section. Since it is provided with an adsorbing section including an adsorbing heater having an adsorbing layer formed therein, the deodorizing machine for toilets has an extremely high adsorbing ability at room temperature.

According to a third aspect of the present invention, the surface of the metal substrate in the decomposition section contains a sintered oxide of aluminum and at least one selected from the group consisting of cerium, barium, lanthanum, and zirconium, and a noble metal catalyst. Because it carries a catalyst, it has excellent deodorizing decomposition ability during regeneration,
The toilet deodorizer has high energy use efficiency.

In the invention described in claim 4, since the metal base material of the adsorbing portion and the decomposing portion is made of expanded metal, the heat capacity is small, the temperature can be rapidly raised by direct energization, and the energy use efficiency is extremely high. It is used as a toilet deodorizer.

According to a fifth aspect of the present invention, when the adsorption section is regenerated, the ventilation means is stopped, and after the temperature of the decomposition section reaches the decomposition temperature, the adsorption heater of the adsorption section is energized to release the adsorption gas. Therefore, the desorbed gas is used as a toilet deodorizer that can be completely oxidized and decomposed in the decomposition section.

[0010]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described. FIG. 1 is a schematic diagram showing the configuration of the present embodiment. In this embodiment, the odor in the toilet 1 is sucked into the toilet deodorizer main body 6 through a connection portion 5 from an intake port 4 provided between the Western toilet 1 and the toilet seat 2. As shown in FIG. 2, the main body 6 of the toilet deodorizer is provided with an adsorption heater in which an adsorption layer is formed on a surface of a metal base material which also functions as an adsorption carrier and a heating element in a housing 11 formed of an electric insulator having a ventilation path 8 formed therein. An adsorbing section 1 comprising an adsorber 9 for adsorbing odorous components disposed on the downstream side of the flow of the processing gas passing through the adsorption heater 9.
3, a catalyst heater 10 having a catalyst layer formed on the surface of a metal substrate also serving as a catalyst carrier and a heating element, a decomposition section 15 including a catalyst body 14 supporting a catalyst for decomposing odor components and the like, and a ventilation means 16. It is constituted by. The adsorbent of the adsorption section 13 is zeolite, silica gel, titanium oxide, zinc oxide,
A catalyst containing at least one selected from the group consisting of silicon oxides and a transition metal oxide catalyst or a noble metal catalyst was used.

The catalyst used in the decomposition section 15 contains a noble metal catalyst containing a sintered oxide of aluminum and at least one selected from the group consisting of cerium, barium, lanthanum, and zirconium. The adsorption heater 9 and the catalyst heater 10 use a porous metal base material as a heater resistor, and have terminals 9a, 9b, 10
a and 10b are arranged. That is, the terminals 9a, 9b,
By supplying commercial power from 10a and 10b,
The adsorption heater 9 and the catalyst heater 10 are heated to generate heat.

The operation of this embodiment will be described below. The toilet deodorizer 6 of this embodiment purifies odor gas generated in the toilet 1 by almost 100% in one pass.
The odor component is sucked by the ventilation means 16 through the connection portion 5 and the odor component is almost completely absorbed by the suction portion 13 including the suction heater 9, so that the odor is not discharged outside the toilet deodorizer 6, and the odor is always in the toilet room. It is an environment that is almost odorless.

Further, in the regeneration of the adsorption section 13 saturated by absorbing the odor component, the adsorption gas is separated by energizing and heating the adsorption heater 9 at predetermined intervals, and the adsorption section 13 can be used repeatedly. That is, first, the ventilation device 16 is stopped by the control device mounted on the toilet deodorizer, and then the terminal 10 of the catalyst heater 10 of the disassembly section 15 is turned off.
A current is supplied from a commercial AC power supply between a and 10b to raise the temperature of the decomposition section 15 to a decomposition temperature or higher. Next, when current is supplied from a commercial AC power supply between the terminals 9a and 9b of the adsorption heater 9 of the adsorption unit 13 at an appropriate timing, the odor component adsorbed on the adsorption unit 13 by the heat generated by the adsorption heater 9 is released. The separated odorous gas is decomposed and purified by the decomposing unit 15 heated to the decomposition temperature in advance, and the adsorption unit 13 is regenerated at the same time.

As described above, according to the present embodiment, the adsorption carrier and the heating element are provided in the housing 11 made of an electrical insulator having the ventilation path 8 communicating with the connection section 5 from the intake port 4 provided in the toilet 1. An adsorbing section 9 comprising an adsorbing heater 9 having an adsorbing layer formed on a surface of a metal base material also serving as an adsorber 12 and adsorbing members 12 adsorbing odor components disposed downstream of the flow of the processing gas passing through the adsorbing heater 9; A catalyst heater 10 having a catalyst layer formed on the surface of a metal substrate which also serves as a catalyst carrier and a heating element, and a decomposition section 15 comprising a catalyst body 14 carrying a catalyst for decomposing odor components and the like.
And the ventilation means 16, the use of energy is greatly reduced, and the toilet odor can be absorbed and decomposed in a maintenance-free manner.

Next, the adsorption section 1 of the toilet deodorizer of the present invention.
A third embodiment will be described with reference to FIG.

The adsorbing section 13 comprises an adsorbing heater 9 and an adsorbing body 12. The adsorbing heater 9 forms an adsorbing layer 17 on the surface of a permeable metal base material such as a punching metal, and has terminals 9a and 9b at both ends thereof. Provided. The adsorption body 12 is the adsorption heater 9
Similarly to the above, the adsorption layer 17 is formed on a permeable metal base material. As the adsorption layer 17, an adsorbent containing at least one selected from the group consisting of zeolite, silica gel, titanium oxide, zinc oxide, and silicon oxide and a transition metal oxide catalyst or a noble metal catalyst is used. With such a configuration, dimethyl disulfide, methyl mercaptan, hydrogen sulfide,
It is possible to obtain the adsorbing section 13 that effectively adsorbs odor components such as ammonia, acetaldehyde, toluene, and xylene at room temperature.

Next, the results of tests on the ability to remove various adsorbent materials are shown in Table 1.

[0018]

[Table 1]

From the results shown in Table 1, oxides and composite oxides of manganese, copper, iron, cobalt, nickel are excellent as adsorbents for removing sulfur-based odors (hydrogen sulfide, methyl mercaptan). Was revealed. However, it was revealed that methyl mercaptan was converted to dimethyl disulfide by the catalytic action of the above adsorbent. From the experimental results, zeolite, silica gel, titanium oxide, and silicon oxide were excellent as adsorbents for adsorbing nitrogen-based odor (ammonia) and dimethyl disulfide.

Next, the disassembling section 1 of the toilet deodorizer of the present invention.
The fifth embodiment will be described with reference to FIG. The decomposition section 15 is disposed on the upstream side of the adsorption section 13. The catalyst heater 10 forms a catalyst layer 18 on the surface of a gas-permeable base material such as an energizable expanded metal.
0b is provided.

As the catalyst layer 18, a catalyst containing a sintered oxide of aluminum and at least one selected from the group consisting of cerium, barium, lanthanum, and zirconium and a noble metal catalyst was used.

Hereinafter, an embodiment of a method for manufacturing the catalyst layer 18 will be described. First, the sintered oxide forming the catalyst layer 18 will be described. The sintered oxide was prepared as follows. After mixing 720 parts by weight of aluminum hydroxide, 217 parts by weight of cerium nitrate hexahydrate, 38 parts by weight of barium carbonate, and 1520 parts by weight of ion-exchanged water, 10 parts were mixed.
After drying at 0 ° C. and sintering continuously at 1000 ° C. for 60 minutes, it was cooled and pulverized to obtain a sintered oxide. In this example, the adjustment of the sintered oxide of aluminum and cerium was described. However, the same effect can be obtained for the sintered oxide of barium, lanthanum, and zirconium.

Next, adjustment of the catalyst slurry will be described. 400 parts by weight of sintered oxide, 50 parts by weight of aluminum nitrate nonahydrate, 80 parts by weight of colloidal alumina,
4.5% by weight dinitrodiammineplatinic nitric acid aqueous solution 68
136 parts by weight of a 4.5 parts by weight dinitrodiammine palladium nitric acid aqueous solution and 256 parts by weight of ion-exchanged water were pulverized with a 2 liter ball mill for 5 hours.
105CP / 2 using a rotary viscometer (manufactured by Tokyo Keiki)
A catalyst slurry having a temperature of 5 ° C. and an average particle size distribution of 4.1 μm (a particle size measuring device manufactured by Shimadzu Corporation) was obtained. Next, the catalyst layer 18
The method for forming the layer will be described.

After a predetermined amount of the catalyst slurry is applied to the metal substrate of the catalyst heater 10, the catalyst slurry is dried at 130 ° C. for 20 minutes.
Firing at 20 ° C. for 20 minutes provided a catalyst heater 10.

Since the decomposition section 15 thus produced has a high catalytic activity, it was possible to remove almost 100% of the odor components generated during the regeneration by heating the electric current. Also,
It is possible to provide an economical deodorizing device having heat resistance and durability.

(Embodiment 2) A second embodiment of the present invention will be described. FIG. 5 shows an embodiment of a control method of the adsorption heater 9 and the catalyst heater 10 at the time of regeneration of the adsorption section 13 of the present embodiment.

As a method for regenerating the adsorption section 13, first, the ventilation means 16 is stopped, and then the catalyst heater 10 is energized. The adsorption heater 9 is energized by detecting that the temperature of the catalyst heater 10 has reached the activation temperature or by setting the time. When the odor components and the like adsorbed on the adsorption section 13 are desorbed by the heat generated by the adsorption heater 9, the catalytic heater 10 already at the activation temperature
Is decomposed by the disassembly unit 15 including.

Next, the power of the adsorption heater 9 is turned off when the completion of the desorption of the adsorption gas is detected or the time is set. Next, the regeneration of the adsorption unit 13 is terminated by detecting that the temperature of the adsorption unit 13 has dropped to a predetermined temperature or by turning off the power of the catalyst heater 10 at a set time.

When the adsorption heater 9 and the catalyst heater 10 are controlled in the above sequence, since the ventilation means 16 is stopped, the processing gas amount is reduced, and the adsorption section 13 is regenerated without discharging odor. , Which can be used repeatedly.

FIG. 5B shows a state in which the electric capacity of the adsorption heater 9 is made smaller than that of FIG.
A method of regenerating the adsorption section 13 by simultaneously supplying current to 0 is shown. This is based on the time difference of the rise,
And the end is the same as in FIG. 5 (a). The same effect can be obtained by such a method.

[0031]

According to the first aspect of the present invention, the suction section including the suction heater having the suction layer formed on the surface of the metal base material serving as the suction carrier and the heating element is provided in the ventilation path for sucking the odor from the toilet. And a decomposition unit including a catalyst heater having a catalyst layer formed on the surface of a metal base material that also serves as a catalyst carrier and a heating element, and a ventilation unit. Adsorbed at normal temperature to the adsorbing section, the ventilation means is stopped during heating and regeneration of the adsorbing section, and the concentrated odorous gas released from the adsorbing section is oxidized and decomposed in the decomposing section. It also has a toilet-free deodorizer that is easy to maintain and easy to maintain.

According to the second aspect of the present invention, at least one selected from the group consisting of zeolite, silica gel, zinc oxide, titanium oxide and silicon oxide and a metal oxide catalyst or a noble metal catalyst are formed on the surface of the metal substrate in the adsorption section. Since it is provided with an adsorbing section including an adsorbing heater having an adsorbing layer formed therein, the deodorizing machine for toilets has an extremely high adsorbing ability at room temperature.

According to the third aspect of the present invention, since the metal base material of the adsorption section and the decomposition section is made of expanded metal, the heat capacity is small, the temperature can be rapidly raised by direct energization, and the energy use efficiency is extremely high. It has a high toilet deodorizer.

According to the fourth aspect of the present invention, since the metal base material of the adsorption section and the decomposition section is made of expanded metal,
The heat capacity is small, the temperature can be raised rapidly by direct energization, and the energy use efficiency is extremely high.

According to the fifth aspect of the present invention, at the time of regeneration of the adsorption section, the ventilation means is stopped, and after the temperature of the decomposition section reaches the decomposition temperature, the adsorption heater of the adsorption section is energized to release the adsorption gas. Therefore, the desorbed gas is used as a toilet deodorizer that can be completely oxidized and decomposed in the decomposition section.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of a toilet deodorizer according to the present invention.

FIG. 2 is a sectional view showing an embodiment of a toilet deodorizer main body of the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of the suction unit of the present invention.

FIG. 4 is a sectional view showing an embodiment of the disassembly section of the present invention.

FIG. 5 (a) is a diagram showing a control method for regenerating the adsorbing section of the deodorizing apparatus of the present invention. (B) A control method for regenerating the adsorbing section of the deodorizing apparatus of the present invention. Figure showing

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Western-style toilet 2 Toilet seat 4 Inlet 5 Connection part 8 Ventilation path 9 Adsorption heater 9a, 9b terminal 10 Catalyst heater 10a, 10b terminal 11 Housing 13 Adsorption part 15 Decomposition part 16 Ventilation means 17 Adsorption layer 18 Catalyst layer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kunikazu Kuchino 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Shiro Takeshita 1006 Kazuma Kadoma, Kadoma-shi, Osaka F-term in Matsushita Electric Industrial Co., Ltd. BA41Y BB07 CA07 CC40 CD01 CD08 DA01 DA02 DA08 DA13 DA20 4G066 AA02C AA15B AA18B AA22B AA23B AA26B AA27B AA61B BA02 CA02 CA22 CA29 DA03 GA02 GA27

Claims (5)

[Claims] 1. An adsorption section including an adsorption heater having an adsorption layer formed on the surface of a metal substrate which also functions as an adsorption carrier and a heating element, and also serves as a catalyst carrier and a heating element in a ventilation path for sucking odor from the toilet. A toilet deodorizer comprising a decomposition section including a catalyst heater having a catalyst layer formed on a surface of a metal substrate, and a ventilation means. 2. A zeolite on a surface of a metal substrate in an adsorption section.
The toilet deodorizer according to claim 1, wherein an adsorption layer containing at least one selected from the group consisting of silica gel, zinc oxide, titanium oxide and silicon oxide and a metal oxide catalyst or a noble metal catalyst is formed. 3. A catalyst comprising a sintered oxide of aluminum and at least one selected from the group consisting of cerium, barium, lanthanum, and zirconium, and a catalyst containing a noble metal catalyst, on a surface of the metal substrate in the decomposition section. Item 1
Or the toilet deodorizer described in 2. 4. The toilet deodorizer according to claim 1, wherein the metal base material of the adsorption section and the decomposition section is an expanded metal. 5. The ventilation means is stopped during regeneration of the suction unit,
The toilet deodorizer according to claim 1, wherein after the temperature of the decomposition section reaches the decomposition temperature, the adsorption heater of the adsorption section is energized to desorb the adsorption gas.