JPH06181973A - Deodorizing device - Google Patents

Abstract

PURPOSE:To provide an excellent deodorizing effect over a long term by constituting a deodorant creeping discharge element in such a way as burying a cylindrical electrode and a heating body separated from each other in the thick wall section of a ceramic dielectric, and providing an absorbing agent or the like such as activated carbon, an odor component absorber, ozone or the like at a position downstream of the element. CONSTITUTION:A cylindrical electrode 3b and a heating body 3d are embedded in the thick wall section of a plate type ceramic dielectric 3c in such a way as separated from each other, and a linear electrode 3a is fixed to the surface of the dielectric 3c, thereby constituting a plate type creeping discharge element 3. This type of element 3 is laid in a venturi tube type restricted section 2 where the air flows after drawn with a fan 15 from the inlet 14 of an air passage 1, thereby composing a deodorant creeping discharge element 5a. Then, creeping discharge is generated at the discharge zone 4 of the element 5a, thereby decomposing an odorous substance. At the same time, heat generated with the heating body 3d is used to prevent the occurrence of a phenomenon of stopping the creeping discharge due to high humidity. The air is, then, treated with a reaction section 6 such as an odorous substance absorbing agent or an ozone gas decomposing solvent, and discharged as the clean air from a flow passage outlet 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a living room, office, hotel, hospital, dining room, garbage storage area, automobile, train,
The present invention relates to a device for deodorizing an offensive odor with ozone gas when an offensive odor is generated in each room such as a ship, an airplane, and a container for freight due to various causes.
It also decomposes harmful gases such as CO, toluene, hydrogen sulfide, acetone, and aldehydes, and ethylene gas, which causes plants, vegetables, and fruits to wither.

[0002]

2. Description of the Related Art Conventionally, when a device of this type is used to deodorize a foul odor in each room, the air in the room is forcibly sucked and flowed by the fan of the device, and the air is directed toward the flowing air. The ozone gas generated by an ozonizer equipped with a creeping discharge element is ejected to deodorize, then passes through the ozone killer to remove the ozone gas, and the ozone gas is returned to the room again as a clean gas.

In this case, since only the ozone gas produced by the ozonizer is mixed with malodorous air and brought into contact therewith to cause a deodorizing reaction, the reaction rate is extremely slow peculiar to the gas phase reaction and the deodorizing effect is poor. In addition, it is difficult to uniformly mix a small amount of ozone gas into the air passage through which a large amount of malodorous air in the room is compared with that of malodorous air, and there is a portion where ozone gas is not mixed and is not deodorized.

In addition, while having a strong deodorizing effect such as NH, NH ₂ and OH locally generated locally in the discharge area of the discharge element constituting the ozonizer, it has a very short life, but it is a chemically active species (hereinafter referred to as radical). It is not possible to expect a high deodorizing effect because a considerable amount of parts are returned to the room as they are without being subjected to the deodorizing effect of (hereinafter collectively referred to as).

Further, in this case, when the malodorous air becomes moist and its humidity becomes high, no creeping discharge occurs in the discharge area of the creeping discharge element, and no ozone gas is generated there, which functions as a deodorizing device. Disappear.

Further, if the malodorous gas having a higher humidity is a gas containing hydrogen sulfide in particular, the linear discharge electrode exposed on the surface of the surface discharge element disappears, and a surface discharge occurs as described above. Not to do so, and shorten the life of the deodorizing device significantly.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to allow a large amount of malodorous air in a room flowing in the air passage of this device to pass near the discharge area of a creeping discharge type ozonizer, and to uniformly generate ozone gas generated therein. In addition to mixing, the radicals generated in the discharge area act evenly on the malodorous substance to decompose it, and even when high-humidity malodorous air is supplied to the vicinity of the creeping discharge type ozonizer discharge area, the creeping discharge is generated there. It is to obtain a high deodorizing effect by preventing the linear discharge electrode on the surface of the creeping discharge element from being damaged even when hydrogen sulfide is contained in the malodorous gas of high humidity.

[0008]

The ozone deodorizing apparatus of the present invention is provided with a narrow portion in the flow passage of the air forcedly sucked and flowing from the inlet by the fan, and is provided in the plate-shaped or cylindrical ceramic dielectric body. A deodorizing creeping discharge element, in which a planar electrode and a heating element are embedded apart from each other, and a linear electrode is fixed so as to face the planar electrode on the surface of the ceramic dielectric, is used for narrowing the flow passage. Provided on the downstream side of the deodorizing creeping discharge element, activated carbon, an absorbing agent for malodorous substances, a reaction section consisting of a catalyst for decomposing ozone gas, and an outlet are sequentially provided, and if necessary, the deodorizing creeping discharge element and A timer is connected to each fan.

Further, at least one of the upstream side of the deodorizing creeping discharge element, between it and the reaction section, or at the downstream side of the reaction section is a collector comprising a mini-pleat filter, an electrostatic mini-pleat filter, an electrostatic precipitator or the like. A dust part is provided to prevent the device and the reaction part from being contaminated by indoor dust and deteriorating their functions. Further, it collects fine particles of activated carbon, absorbent, catalyst, etc., which may be scattered from the reaction section, and prevents them from being mixed in the exhaust gas.

Further, an ozone sensor is provided on the downstream side of the reaction section so that the activated carbon, the absorbent, the catalyst and the like in the reaction section deteriorate in performance over time, so that ozone having a concentration of a predetermined safe value or more remains in the exhaust gas. When this occurs, it detects this and lights an alarm lamp to notify when it is time to replace these activated carbon, absorbent or catalyst, and if necessary, turns off the power of the creeping discharge ozonizer to stop the generation of ozone. Is.

[0011]

[Operation] Using this device, deodorize the bad odors in each room,
Further, when decomposing harmful gas or ethylene, this device is arranged and used in advance on the floor, ceiling, wall surface, etc. of the room.

A deodorizing creeping discharge for deodorizing a bad odor in the room and driving a fan for forcibly flowing the indoor air in the air passage when decomposing harmful gas or ethylene to embed a heating body. The element is activated, a creeping discharge is generated on the surface of the element, and the portion is dried by the heat generated by the heating element.

When the air in the chamber is sucked into the upper flow passage through the inflow port and passes through the narrow portion of the flow passage, a heated and dried discharge area of a creeping discharge element provided therein is provided. Ozone gas and O generated at that time
Radicals such as N, NH, NH ₂ and OH decompose most of the malodorous substances, toxic substances and ethylene contained in the malodorous air, and then, when passing through the reaction part, oxidation of these substances by ozone, After the removal of residual main decomposition products and ozone with an absorbent or catalyst, the odorless or harmless air is returned to the original room through the outlet.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. The narrow portion 2 of the air passage 1 formed into a Venturi tube for flowing the air forcibly sucked by the fan 15 from the inlet 14 of the air passage 1. Plate-shaped creeping discharge element 3 inside
The discharge area 4 is exposed to form the deodorizing creeping discharge element 5a.

A planar electrode 3b, a heating element 3d, and a plate-shaped ceramic dielectric 3c in which the plate-shaped creeping discharge element 3 is embedded in a wall-thickness t of a plate-shaped ceramic dielectric 3c with a distance tc therebetween.
Of the linear electrode 3a fixed to the surface of the flat electrode 3b so as to face the planar electrode 3b, and a ceramic protective layer 3e covering the surface of the linear electrode 3a and the plate-shaped dielectric 3c. A reaction section 6 made of activated carbon, a malodorous substance absorbent, or a catalyst for decomposing ozone gas, such as titania silica, is sequentially provided downstream of the creeping discharge element 5a, and an outlet 11 for clean air is provided downstream of the reaction section 6. Set up.

A timer 12 is provided on the linear electrodes 3a and the planar electrodes 3b of the plate-shaped creeping discharge element 3 constituting the deodorizing creeping discharge element 5a via a high frequency high voltage power supply 18 and a wiring 17, and a heating element 3d. 3f of the heating wire constituting the
An AC or DC heating power source 22 is connected to 3f, and the timer 12 is similarly connected to the motor 15a of the fan 15 via a wire 27.

Further, the ozone sensor 3 is provided downstream of the reaction section 6.
7, an output signal thereof is connected to the alarm lamp 39 via the wiring 38, and is connected to the high frequency high-voltage power supply 18 and the motor 15a of the fan 15 via the wirings 40 and 41, respectively.

The plate-shaped creeping discharge element 3 is shown in FIGS.
As shown in FIG. 3, a high-purity alumina ceramic dielectric 3c is interposed between the linear electrode 3a made of tungsten and the planar electrode 3b, and a high-frequency high-voltage power supply 18 is applied to both electrodes 3a, 3b.
Is connected to generate high-frequency creeping discharge in the discharge region 4, and the AC power source 22 is connected to the heating element 3d to heat the creeping discharge element 3.

A screen 1 such as a wire mesh is provided at the inflow port 14.
3 is provided to remove foreign matter in the room air 8, and further, mini pre-filters 16a, 16b and 16c are detachably provided immediately below the screen 13 and upstream and downstream of the reaction section 6 to remove dust.

When deodorizing a bad odor in a room or decomposing harmful gas or ethylene by using this apparatus, the timer 12 is used.
After that, electric power is supplied to the motor 15a to drive the fan 15 so that the indoor air 8 flows in the air passage 1 in the direction of the arrow A1 to activate the deodorizing creeping discharge ozonizer 5, that is, the creeping discharge. A high frequency high voltage is applied between the linear electrode and the planar electrode 3b of the element 3 to generate a creeping discharge on the surface of the plate-shaped dielectric 3c, and the heating body 3d is heated by the AC power source 22 to generate the plate-shaped dielectric. The surface of the dielectric 3c is heated and dried to prevent the phenomenon of stopping the creeping discharge due to high humidity.

In this state, the air 8 in the room flows into the air passage 1, and when the mini pleated filter 16a removes dust and passes through the narrow portion 2 of the air passage 1, the creeping discharge element 3 provided therein is It intersects the discharge area 4 which is heated and dried on the surface.

Ozone gas generated in the heated and dried discharge area 4 and radicals such as O, NH, NH ₂ and OH cause a bad odor in the indoor air 8, even if the indoor air is highly humid. After deodorizing and decomposing, the dust is removed by the mini pre-filter 16b, the decomposition products and the ozone gas remaining in the reaction section 6 are removed, and the fine particles from the reaction section are further removed by the mini pre-filter 16c.
The clean air from the outlet 11 is returned to the original room.

Further, the ozone concentration of the downstream of the reaction section 6 is monitored by the ozone sensor 37, and when the concentration exceeds a predetermined threshold (for example, 0.05 ppm) which is safe for the human body, the high frequency and high voltage power supply 18 is turned off to generate ozone. And the motor 15a of the fan 15 are stopped to notify the arrival of the replacement time of the activated carbon, the absorbent, the catalyst and the like in the reaction section.

Therefore, according to this device, the fan 15
Since the discharge area 4 of the creeping discharge element 3 is formed on the inner surface of the narrow portion 2 of the air passage 1 which is forced to flow in the air passage 1
All of the indoor air 8 flowing in from the inflow port 14 of the air passes through the vicinity of the discharge region 4 of the creeping discharge element 3, and the ozone gas generated at that time and radicals such as O, NH, NH ₂ , OH, etc. It is possible to deodorize malodor in the air 8 without unevenness.

At this time, since the vicinity of the linear electrode 3a on the surface of the creeping discharge element 3 is heated and dried by the heating element 3d embedded in the wall thickness of the creeping discharge element 3, the indoor air 8 is highly humid. However, there is no possibility that the creeping discharge on the surface of the discharge element 3 will stop.

According to this apparatus, even if the room air 8 has high humidity, the bad odor can be deodorized and the room air 8 can be made clean without ozone gas. Further, it is possible to prevent the ozone concentration of the exhaust air from exceeding a safe level for the human body.

Further, since the timer 12 is connected to each of the deodorizing creeping discharge element 5 and the fan 15, the modes of deodorizing by ozone gas and its suspension are automatically switched to perform the following operation. You can

That is, when the apparatus is installed in an office or the like and the room is deodorized, the timer 12 is set to a predetermined time so that, for example, from midnight to 8:00, as shown in FIG. Even if the worker enters the room, the rest mode B is set as described above, and the deodorizing mode A is set as described above between 8 am and 9 am to remove the bad odor by ozone gas to make the room clean air. Keep it safe.

After 9 o'clock, an office worker enters the room to perform office work, and from 10 o'clock to 7 pm, various offensive odors are generated due to the behavior of the office worker who is in the room. The deodorization is performed by alternately repeating the mode A and the rest mode B every hour to maintain a comfortable environment.
From 7 pm to 8 am the next day, there are no workers, so it is possible to set the rest mode B again and repeat the above-mentioned modes the next day.

Although the embodiments of the present invention have been described above with reference to FIGS. 1 to 7, the present invention is not limited to these embodiments, and a mechanism may be appropriately added or changed within the scope of the present invention. It is possible to carry out.

For example, the plate-shaped deodorizing creeping discharge element 5a shown in FIG. 1 is for deodorizing a bad odor in the air flowing through the creeping discharge generated in the discharge region 4, but the creeping discharge shown in FIG. The element 3 is rolled up so that the linear electrode 3a is on the inner side to form a cylindrical deodorizing creeping discharge element 5b.
As shown in FIG. 3, a cylindrical counter electrode 21 is installed in the flow passage 1 so as to face the linear electrode 3 a of the cylindrical deodorizing creeping discharge element 5 b, and the counter electrode 21 is connected to a DC high-voltage power supply 25 via a switch 24. When connecting and further grounding the other end and the linear electrode 3a as shown in the drawing, a high-voltage electric field is formed between the linear electrode 3a and the counter electrode 21, and the linear electrode 3a is formed.
A unipolar ion flow (negative polarity in this example) is generated from the above toward the counter electrode 21, and dust in the air flowing between them is charged and can be attached to the counter electrode 21 and collected.

Further, since the dust which has not been collected is also charged, it becomes easy to be collected by the electrostatic action on the filter provided downstream thereof.

In FIG. 1, a mini-pleat filter 16a for removing dust in the air is provided upstream of the reaction section 6.
Instead of this, a plurality of dielectric layers 30 such as a plastic sheet having conductive film electrodes 31 attached to one side surface are arranged side by side with a gap 32 therebetween, as shown in FIG. It is also possible to form an electrostatic precipitator by connecting a direct current high voltage power supply 33 to each of the electrodes 31 via a switch 29 so that the polarities are alternately different.

Further, as shown in the embodiment of FIG. 9, electrodes 34 and 35 are provided on the upstream side and the downstream side of the upstream side mini-pleat filter 16b of the reaction section 6 of FIG. When connecting, an electric field is formed in the filter layer between the upstream side and the downstream side of the mini-pleat filter 16b, and the electric field between them forms the electrostatic mini-pleat filter 16d to further improve the filter function. can do.

Furthermore, as shown in the embodiment of FIG.
The inside of the air-conditioning duct 10 is divided into a plurality of parts by the frame body 9, and each is shown in FIG.
It is also possible to install a deodorizing unit 20 in which the air passage 1, the inflow port 4, the narrow portion 2, the deodorizing creeping discharge element 5, the filters 16a and 16b, and the reaction portion 6 are modularized.

In this case, since the indoor air 8 flowing through the air conditioning duct 10 can be divided into a plurality of deodorizing units 20 to be treated, a large amount of air can be deodorized in a short time.

[0037]

The present invention is as described above, and since the discharge area of the creeping discharge element is formed inside the narrow portion of the air passage forcibly flowing by the fan, it flows in from the inlet of the air passage. All of the room air passes near the discharge area of the creeping discharge element, and the on-gas, O, N, NH, and
Radicals such as NH ₂ and OH enable deodorization to be carried out evenly.

At this time, since the heating element is embedded within the wall thickness of the creeping discharge generating element, the surface of the ceramic dielectric can be heated and dried by the generated heat, and even if the stinking air supplied thereto has high humidity. Does not prevent the occurrence of creeping discharge.

Further, since the reaction portion is provided downstream of the deodorizing creeping discharge element, the inlet is provided upstream of the deodorizing creeping discharge element, and the outlet is provided downstream of the reaction portion. It is possible to decompose bad odor of air, harmful gas, ethylene, etc., and further remove ozone gas to return to clean air without ozone gas and return it to the room.

Further, since the timer is connected to each of the deodorizing creeping discharge element and the fan, the above-mentioned deodorization by ozone gas can be continuously and automatically switched and operated according to a predetermined time schedule.

Further, the ozone gas concentration in the exhaust air is constantly monitored by an ozone sensor, and if it exceeds a human body safety value, ozone generation is stopped, so that the safety of the human body is always guaranteed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a portion of FIG.

FIG. 3 is a front view of the portion of FIG.

FIG. 4 is a rear view of the portion of FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a cross-sectional view taken along the line VI-VI in FIG.

FIG. 7 is a diagram showing the state of each mode with respect to the passage of time when deodorizing the room using the embodiment of FIGS. 1 and 2.

FIG. 8 is a vertical sectional view of another embodiment of the present invention.

9 is an enlarged cross-sectional view of another embodiment of a portion of FIG.

FIG. 10 is a vertical sectional view of still another embodiment of the present invention.

[Explanation of symbols]

 1 Air passage 2 Narrow part 3 Plate-shaped creeping discharge element 3a Linear electrode 3b Surface electrode 3c Dielectric 3d Heating element 4 Discharge area 5a Plate-shaped deodorizing creeping discharge element 5b Cylindrical deodorizing creeping discharge element 6 Reaction part 8 Indoor Air 9 Frame 10 Air-conditioning duct 11 Outlet 12 Timer 14 Inlet 15 Juan 15a Motor 16a Mini-pleats filter 16b Mini-pleats filter 16c Mini-pleats filter 16d Electrostatic mini-pleats filter 17 Wiring 18 High-frequency high-voltage power supply 21 20 Deodorization unit 21 AC power supply 23a Wiring 23b Wiring 25 DC high voltage power supply 30 Dielectric layer 31 Membrane electrode 32 Void 33 DC high voltage power supply 34 Electrode 35 Electrode 36 DC high voltage power supply 37 Ozone sensor 38 Wiring 39 Alarm lamp 40 Wiring 41 Wiring

Claims (9)

[Claims] 1. A planar electrode and a heating element are embedded in the thickness of a plate-shaped or cylindrical ceramic dielectric so as to be spaced apart from each other, and a wire is provided on the surface of the ceramic dielectric so as to face the planar electrode. A creeping discharge element having a fixed electrode is provided in a narrow portion of a flow passage of air flowing in a fan to form a creeping discharge element for deodorization, and activated carbon and an absorbent for a malodorous component are provided downstream of the creeping discharge element for deodorization. , Ozone absorber, ozone decomposition catalyst 4
A deodorizing device characterized in that a reaction part having at least one of them and an outlet are sequentially provided. 2. The deodorizing device according to claim 1, wherein a protective layer is formed over the surface of the linear electrode of the creeping discharge element and the surface of the ceramic dielectric. 3. The deodorizing device according to claim 1, wherein a timer is connected to each of the deodorizing creeping discharge element and the fan. 4. The deodorizing device according to claim 1, wherein the flow passage of the air flowing in the fan and the narrow portion thereof are formed in a Venturi tube. 5. A mini pleated filter is provided on at least one of the upstream side of the deodorizing creeping discharge element, the element and the reaction section, or the downstream side of the reaction section. Deodorizing device. 6. An ozone sensor for detecting the ozone concentration is provided on the downstream side of the reaction part, and the output signal thereof is connected to an alarm lamp and the power source part of the deodorizing creeping discharge element so that the ozone concentration has a predetermined threshold value. The deodorizing device according to claim 1, wherein when the temperature exceeds the threshold, at least one of supplying the ozone by turning on the alarm lamp and stopping the power supply unit is performed. 7. The deodorizing apparatus according to claim 1, further comprising a counter electrode facing the discharge area of the deodorizing creeping discharge element and connected to a DC high-voltage power supply. 8. A plurality of dielectric layers, each having a conductive film electrode attached to one side surface thereof, are arranged side by side on the upstream side of the reaction section with a gap therebetween, and a DC high-voltage power source is alternately applied to each electrode. The deodorizing device according to claim 1, further comprising an electrostatic precipitator that is connected differently. 9. The deodorizing device according to claim 1, wherein electrodes are provided on the upstream side and the downstream side of the mini pre-filter, and a DC high voltage power source is connected between the electrodes.