JPH07265404A - Deodorizing device - Google Patents

Abstract

PURPOSE:To obviate heat radiation of a deodorizing element by blasting and to improve oxidative decomposition of smells and resetting of activity of adsorbents by making the smells adsorbed on the deodorizing element in a blast path, then stopping a fan in the blast path at the time of oxidatively decomposing the adsorbed components by energizing the deodorizing element. CONSTITUTION:The deodorizing element 1 consists essentially of conductive ceramics and is formed to a honeycomb structure having many through holes. The inside surface of the element is coated with the adsorbents and oxidation catalysts for adsorbing and oxidatively decomposing the smells and a pair of electrodes consisting of metal coating films are disposed on the outside surface thereof. The deodorizing element 1 is arranged via an insulating material 4 into the blast path 9 formed by installing the fan 11 into the deodorizing device. Further, terminals 5 for the power source of the electrodes 2 are connected together with the fan 11 via leads 6 and a switch 10 and circuit 8 for changing over of deodorization and regeneration to an output control circuit 7. The fan 11 is stopped at the time of oxidative decomposition of the adsorbed components by energizing the deodorizing element 1 after adsorption of the smells.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing device used for toilets, septic tanks, shoe boxes, cookers and the like.

[0002]

2. Description of the Related Art As a deodorizing element used in a conventional deodorizing device, there are activated carbon, zeolite type, ozone type and chemicals.

The above-mentioned activated carbon and zeolite type include those having a honeycomb shape, a fibrous felt, a granular shape and the like. In each case, the odor is brought into contact with the activated carbon by blowing air to physically adsorb odorous molecules into the pores of the activated carbon to deodorize. It is a thing. The ozone type is composed of a pressure generator, an ozonizer, and an ozone decomposing catalyst. Ozone is generated by applying a high voltage to the ozonizer to cause corona discharge, and the odor component is oxidatively decomposed by the ozone, and then it is left behind. The deodorized ozone and odor are treated by a manganese dioxide-based catalyst. In the above-mentioned chemicals, a non-combustible cloth or the like is usually impregnated with an alkaline or acidic water-soluble salt, and each odor is brought into contact therewith to deodorize by a neutralization reaction.

[0004]

The above-described conventional deodorizing device has the following problems.

That is, there is a problem that activated carbon and chemicals have a life and must be replaced after a certain period of use, and the ozone type generally requires a high pressure generator, an ozonizer, and an ozone decomposition catalyst, which makes the structure complicated. There is a problem that the cost becomes high, and there is also a problem that the decomposition and deodorizing effect on the odor of fatty acids such as isovaleric acid and acetic acid generated in a shoe box is poor.

[0006]

DISCLOSURE OF THE INVENTION The present invention has solved the above problems, and a deodorizing apparatus according to claim 1 is provided with an air blowing passage having a blower in the deodorizing equipment, and the air blowing passage is provided in the air blowing passage. It is composed of a conductive ceramic as a main component and has a honeycomb structure having a large number of through holes, the inner surface of which is covered with an adsorbent for adsorbing and oxidatively decomposing odors and a proliferative catalyst, and the outer surface of which is a metal. A deodorizing element provided with a pair of electrodes made of a film is provided, and after adsorbing an odor, the deodorizing element is energized to provide a control means for stopping the blower when the adsorbed components of the deodorizing element are oxidized and decomposed. .

Further, the deodorizing device according to claim 2 is used in summer
A winter setting means or a seasonal setting means is provided, and when deodorizing when the summer / winter setting means or season setting means is in the summer, the deodorizing element is deenergized, and in the winter, the deodorizing element is connected to the deodorizing element. An energization control means for energizing the device is provided. And the deodorizing device according to claim 3 is
There is provided time zone setting means for setting the time zone in which the deodorizing element is oxidized and decomposed to a time zone in which the frequency of deodorization is low. Further, in the deodorizing device according to the fourth aspect, the deodorizing element is formed of a conductive ceramic having a negative characteristic.

[0008]

According to the present invention, in the above structure, the adsorbent coated on the inner surface for ventilating the odor-containing honeycomb adsorbs and deodorizes this odor component. However, when the adsorbent adsorbs a certain amount of odor, the adsorbent breaks through and the deodorizing performance deteriorates, like activated carbon. At this time, when a constant voltage is applied between the electrodes, an electric current flows in the honeycomb made of a conductive ceramic and is heated by Joule heat. At this time, the control means cuts off the power supply to the blower to stop the blower. Therefore, the deodorizing element does not release heat due to the air blow of the blower and is in a no-load energized state, and the temperature of the oxidation catalyst rises in a short time to oxidatively decompose the odorous molecules of the odor, and the adsorbent that has passed through is the original Return to the active state of.

Further, in the summer, when the high temperature cannot be generated, the deodorizing element is de-energized by de-energizing the deodorizing element only by blowing air from the blower, and in the winter, the deodorizing element is energized. Deodorize by raising the temperature of the deodorizing element. And
The deodorizing element is oxidatively decomposed and regenerated in the time zone set by the time zone setting means and in which the deodorizing frequency is low. Furthermore, since the deodorizing element is made of a conductive ceramic with negative characteristics, the blower is stopped and there is no wind when the odorous molecules are oxidatively decomposed, and this negative characteristic causes the deodorizing element to rapidly rise in temperature and oxidize in a short time. The temperature rises to the decomposition level, and oxidative decomposition (regeneration of the deodorizing element) is completed.

As described above, according to the present invention, it is possible to provide a deodorizing element which is maintenance-free (replacement of the deodorizing material is unnecessary) with respect to activated carbon, zeolite and chemicals and which is low with respect to the ozone type. In addition, a deodorizing device having a simple structure and a low cost can be provided by combining the structure of the blast system and the external power source for applying a voltage to the element.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an external view of the honeycomb deodorizing element of the present invention. In FIG. 1, 1 is a deodorizing element and 2 is an electrode. FIG. 2 is an enlarged view of the honeycomb portion of the deodorizing element of FIG. 1, and in FIG. 2, 1a is a cell (through hole), 1b is a rib, and 3 is a deodorizing film layer. The deodorizing film layer 3 is an adsorbent such as zeolite, sepiolite, alumina, and silica that has a deodorizing function by adsorption at normal temperature, manganese dioxide for peroxidative decomposition of odorous components when heated, perovskite-type metal oxide, and platinum group supported on alumina. It is composed of an oxidation catalyst such as metal and alumina sol or silica sol as a binder.

In the above-mentioned structure, the odorous component passing through the cell 1a due to the blowing of air continues to be adsorbed by the adsorbent in the deodorizing film layer 3 at room temperature, but reaches the breakthrough with the passage of time, and its function gradually increases. descend. At this time, when a voltage is applied between the electrodes 2, a current flows through the rib 1b and Joule heat is generated.

The oxidation catalyst contained in the deodorizing film layer 3 is also heated at the same time to oxidize and decompose the odor components adsorbed by the adsorbent and the odor components passing through the cell 1a to deodorize. It returns to the original state and the adsorption function is restored. In this case, an appropriate heating condition for the deodorizing element 1 is around 300 ° C. for 2 to 10 minutes. As described above, the deodorizing element 1 of the present invention has a permanent deodorizing function by being energized periodically.

The outer shape of the honeycomb as a deodorizing element may be circular, polygonal, rectangular parallelepiped or the like, but the rectangular parallelepiped is most suitable for conducting electricity as in the present invention, and the electrode is parallel to the through hole. It is easy to form the electrodes on opposite surfaces, and a uniform electrode can be made to flow over the entire deodorizing element, so that uniform heating can be achieved.

Further, as the conductive ceramics constituting the deodorizing element, the porous ceramics made of silicon carbide and silicon nitride also have an adsorbing performance by themselves, so that the deodorizing performance of the element is improved. Moreover, the catalyst is well supported, and the thermal shock resistance due to repeated heating is excellent. This is described in detail in Japanese Patent Application Laid-Open No. 4-132662, which is a prior application patent filed by the present inventor. The electrodes are usually formed by a sprayed coating of aluminum or nickel or a silver paste coating.

FIG. 3 is a schematic circuit diagram of a deodorizing device using the deodorizing element 1 of the present invention. In FIG. 3, the deodorizing element 1
Is installed inside the ventilation passage 9 via an insulating material 4, and is fixed to the ventilation passage 9 by a ventilation terminal 4. Energizing terminal 5
Is connected via a lead wire 5 to an output control circuit 7 including an output control section and a timer section. Reference numeral 8 is a deodorization / reproduction switching circuit having a clock function and a time setting function, and controls the switch 10 and the output control circuit 7. Reference numeral 11 is a blower provided in the air passage 9.

FIG. 4 is an explanatory diagram showing the temperature of the deodorizing element 1 and the energization of the deodorizing element 1 and the blower 11 during deodorization and oxidative decomposition (regeneration). In FIG. 4, during the deodorizing operation, the deodorization / regeneration switching circuit 8 turns on the switch 10 and the output control circuit 7 energizes the deodorizing element 1 and the blower 11. The temperature of the deodorizing element 1 rises due to this energization, but since the blower 1 operates to blow air, the temperature of the deodorizing element 1 becomes about 60 ° C., and the odorous molecules contained in the air blown by the blower 11 are adsorbed by the adsorbent. Adsorb with and deodorize. And when deodorizing,
The deodorization / regeneration switching circuit 8 turns off the switch 10 to cut off the power supply to the blower 11 and stop the blower 11. Then, the temperature of the deodorizing element 1 rises to about 3
The temperature rises to 00 ° C., the odorous molecules are decomposed by the oxidative decomposition of the oxidation catalyst, and the deodorizing element 1 is regenerated.

FIG. 5 is an explanatory view showing the operating state of the deodorizing device when the season is set by the output control circuit 7 which functions as the summer / winter setting means or the season setting means. In FIG. 5, when the season set by the output control circuit 7 is summer, the deodorizing element 1 is not energized during deodorization and only the blower 11 is energized to deodorize, and during oxidative decomposition (regeneration), the deodorizing element is deactivated. 1 is energized, the energization to the blower 11 is cut off, the blower 11 is stopped, and the deodorizing element 1 is regenerated. In the winter season, both the deodorizing element 1 and the blower 11 are energized to deodorize during deodorization, and during oxidative decomposition (regeneration), the deodorizing element 1 is energized to cut off the energization to the blower 11 to blow the air. 11 is stopped and the deodorizing element 1 is regenerated.

FIG. 6 shows a case in which the time zone is set by the deodorization / regeneration switching circuit 8 which functions as a time zone setting means for setting the time zone for oxidative decomposition of the deodorizing element to the time zone for which deodorization is less frequent. It is explanatory drawing which shows the operating state of a deodorizing apparatus. In FIG. 6, the deodorizing element 1 is not regenerated when the deodorizing device is frequently deodorized in the daytime, and the deodorizing element 1 is automatically regenerated when the deodorizing operation is low at night. Take action.

FIG. 7 is a flow chart for explaining the operation of the deodorizing device having the above structure.

FIG. 8 is a characteristic diagram showing the deodorizing effect of ammonia using the deodorizing apparatus of the present invention. In FIG.
The vertical axis represents the deodorization rate, which is the ratio of the ammonia concentration after deodorization to the ammonia concentration before deodorization, and the horizontal axis represents the SV value, which is the value obtained by dividing the air volume per hour by the volume of the deodorization element,
The deodorization rate with respect to the SV value of the deodorizing element using three types of honeycombs (A for 180 cells, B for 300 cells, and C for 400 cells) is shown. The ammonia concentration before deodorization is 28 ppm.

FIG. 9 shows the deodorizing rate with respect to time when the deodorizing apparatus of the present invention uses a 180-cell honeycomb deodorizing element, an air flow rate condition of SV30000, and 80 ppm of ammonia and is repeatedly deodorized for 10 minutes with no current applied and for 2 minutes with current applied. ing.
The deodorization rate decreases with the passage of time when there is no energization, but the deodorization rate recovers again by energizing for 2 minutes, and the deodorization rate is maintained at 90% or more permanently.

[0024]

As described above, in the deodorizing apparatus of the first aspect, the adsorbent and the oxidation catalyst are coated on the inner surface of the conductive ceramic honeycomb structure, and the outer surface is provided with the pair of electrodes. As a result, a deodorizing element and a deodorizing device having a permanently high deodorizing effect, structurally simple and low cost are provided.

Further, since the honeycomb structure is a rectangular parallelepiped and the electrodes are provided on the outer surface parallel to the through holes, the electrodes can be formed easily, and a uniform current can be passed through the deodorizing element when energized. That is, the entire element can be heated uniformly and the adsorption function can be efficiently recovered. Moreover, since switching between deodorization and regeneration can be performed by turning on and off the blower, deodorization and regeneration can be performed with a simple structure, and deodorization and regeneration operations can be easily automated. Further, in the deodorizing device of claim 2, in the summer, when the high temperature cannot be generated, the deodorizing element is de-energized by de-energizing only by the blower, and in the winter,
It is possible to energize the deodorizing element and raise the temperature of the deodorizing element to perform deodorization.In the summer, warm air is blown when warm air is not needed and the user does not feel uncomfortable that it is hot. It is possible to obtain the deodorized state that was there.

In the deodorizing device of claim 3,
Since the deodorizing element is oxidatively decomposed and regenerated during the time when the deodorizing is set less frequently by the time zone setting means, the deodorizing element cannot be deodorized because the deodorizing element is being regenerated when deodorizing is required. It can be prevented as much as possible.

Further, in the deodorizing device of claim 4,
Since the deodorizing element is formed of a conductive ceramic with negative characteristics, the blower is stopped and there is no wind when the odorous molecules are oxidatively decomposed, and due to this negative characteristic, the deodorizing element causes a rapid temperature rise and oxidative decomposition in a short time. As the temperature rises and oxidative decomposition (regeneration of deodorizing element) can be completed,
It is possible to provide a deodorizing device that prevents abnormal temperature rise of the deodorizing element and is safe against high temperature oxidation.

[Brief description of drawings]

FIG. 1 is an external perspective view of a deodorizing element according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of a honeycomb portion of the deodorizing element shown in FIG.

FIG. 3 is a schematic circuit diagram of a deodorizing device in one embodiment of the present invention.

FIG. 4 Deodorizing time and oxidative decomposition (regeneration) of the deodorizing apparatus of the present invention
It is explanatory drawing which shows the temperature of the deodorizing element 1 at the time, and the electricity supply to the deodorizing element 1 and the air blower 11.

FIG. 5 is an explanatory diagram showing an operating state of the deodorizing device when the season is set by the output control circuit 7 functioning as the summer / winter setting device or the season setting device of the deodorizing device of the present invention.

FIG. 6: The time zone is set by the deodorization / regeneration switching circuit 8 which functions as a time zone setting means for setting the time zone for oxidative decomposition of the deodorizing device of the deodorizing apparatus of the present invention to the time zone for which the frequency of deodorization is low. It is explanatory drawing which shows the operating state of the deodorizing device at the time of doing.

FIG. 7 is a flowchart explaining the operation of the deodorizing device of the present invention.

FIG. 8 is an explanatory diagram of a deodorizing rate-SV value when the deodorizing device in one example of the present invention is used.

FIG. 9 is an explanatory diagram of a deodorizing rate-time when the non-energizing-energizing is repeated by using the deodorizing device in one embodiment of the present invention.

[Explanation of symbols]

 1 Deodorizing Element 1a Cell 1b Rib 2 Electrode 3 Deodorizing Film Layer 4 Insulating Material 5 Power Supply Terminal 6 Lead Wire 7 Output Control Circuit 8 Deodorizing / Regeneration Switching Circuit 9 Air Duct 10 Switch 11 Blower

Claims (4)

[Claims] 1. A deodorizing device is provided with an air blow passage having a blower, and the air blow passage is made of a conductive ceramic as a main component and has a honeycomb structure having a large number of through holes, and an odor is adsorbed and oxidized on the inner surface thereof. A deodorizing element provided with an adsorbent for decomposing and a prosthesis catalyst and having a pair of electrodes made of a metal film on the outer surface thereof is provided, and after adsorbing the odor, the deodorizing element is energized. A deodorizing device comprising a control means for stopping the blower when the adsorbed component of the deodorizing element is oxidatively decomposed. 2. A summer / winter setting means or a season setting means is provided, and when deodorizing when the summer, winter setting means or season setting means is summer, the deodorizing element is de-energized, and in the case of winter. 2. The deodorizing device according to claim 1, further comprising an energization control means for energizing the deodorizing element during deodorization. 3. The deodorizing device according to claim 1, further comprising a time zone setting means for setting a time zone in which the deodorizing element is oxidatively decomposed to a time zone in which the deodorizing frequency is low. 4. The deodorizing device according to claim 1, wherein the deodorizing element is formed of a conductive ceramic having a negative characteristic.