JPS644786B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD This invention relates to a simple deodorizer using ozone that is applied to general household use and other fields. Conventional technology Recently, deodorization using ozone has been in the spotlight, but such deodorization equipment requires an ozone generator, a reaction chamber, equipment for decomposing excess ozone, etc., which increases the size of the equipment and equipment costs. Furthermore, since highly concentrated ozone is used, the area around the ozone flow path must be made of ozone-resistant material, and from these points of view, its field of use has been limited to industrial use. However, since the effectiveness of ozone deodorization is remarkable, it is necessary to explore fields of use other than those mentioned above, and there is a strong desire to develop a deodorizer that is smaller and simpler and can be used in general households. Ta. Problems to be Solved by the Invention It is an object of the present invention to make ozone deodorizing equipment small and simple so that it can be applied in ordinary homes, and to expand its field of use. Means for Solving the Problems An ozone generating electric field device, a deodorizing body made of a porous filter as a carrier and a catalyst added thereto, or the deodorizing body and an insulating non-ventilating body, and the interior of the electric field device is and a deodorizer main body provided with an electric field space, and the electric field device is disposed within the space. Function Ozone generated by the electric field device in the electric field space of the simple deodorizer passes through the deodorizing body while decomposing and reacting due to the heat and kinetic energy obtained from the discharge, becoming oxygen and diffusing to the outside. As this diffusion occurs, external malodorous air is taken into the space through the deodorizing body, but the malodorous components are oxidized, decomposed, and deodorized through the space and the deodorizing body, and diffuse to the outside.
Given that diffusion and uptake occur in this way, the sealed space around the deodorizer takes time to circulate and deodorization progresses. Embodiment An embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. Fig. 1 is a cross-sectional and perspective view of the simple deodorizer of the present invention, Fig. 2 is an enlarged sectional view of the X and X lines in Fig. 1, Fig. 3 is a plan view of the electric field device, and Fig. 4 is the circle line in Fig. 3. FIG. 5 is an enlarged sectional view of another embodiment. In the figure, 1 is an ozone generating electric field device, 2 is a deodorizing body, and 3 is
is a non-ventilating body, 4 is an electric field space part, 5 is a deodorizer body,
6 is a simple deodorizer, and 7 is an ozone-resistant, breathable outer cover. The ozone generating electric field device 1 has wires or strip electrodes 1b and 1c buried in parallel in an insulating layer 1a, and a high voltage from an AC power source 8 is applied to the wires 8.
When it is applied through a, a silent discharge occurs in the gas in the space near the surface of the layer 1a, and ozone is generated from the oxygen in the gas. The deodorizer main body 5 has a porous filter with excellent adsorption properties that has continuous pores due to a three-dimensional skeleton structure as a carrier, and a deodorizer 2 which has been additionally treated with a catalyst for ozone decomposition, which will be described later, or the deodorizer 2. It is constructed of an insulating non-ventilated material 3 such as a ceramic plate, and is provided with an electric field space portion 4 having the required volume to house the electric field device 1 and generate ozone. That is,
A simple deodorizer 6 of the present invention has the electric field device 1 installed in the space 4 so as to be able to generate ozone. The simple deodorizer 6 exemplified in No. 1 and 2 consists of a deodorizing body 2 and a non-ventilating body 3, and an electric field space 4 for the interior of the electric field device 1 is provided inside the deodorizer main body 5.
The electric field device 1 is installed on the non-ventilated body 3 with the upper surface of the layer 1a exposed in the space 4 so that ozone can be generated. The simple deodorizer 6 shown in FIG. 5 consists of only a deodorizer 2 and has an electric field space 4 for the interior of the electric field device 1 inside to form a deodorizer main body 5, and the electric field device is located in the middle of the space 4. 1 is placed. Examples of the porous filter include the product names Ceramic Foam (manufactured by Bridgestone Corporation) and Selmet (manufactured by Sumitomo Electric Industries, Ltd.), which have continuous pores formed by a three-dimensional skeleton structure, It has the property of adsorbing malodorous components (including hydrogen sulfide, ammonia, and other malodorous components). Suitable catalysts include transition metal oxides such as nickel oxide and copper oxide, noble metals such as platinum, or mixtures thereof. In FIG. 2, the simple deodorizer 1 of the present invention is
When a high voltage (2.1 to 3.5 KV) from the AC power supply 8 is applied to the electrodes 1b and 1c of the electric field device 1, a silent discharge occurs in the gas in the space 4a near the surface of the insulating layer 1a, and this causes the gas to Ozone is produced from the oxygen inside. O ₂ +e ^- →2O O+2O ₂ →O ₃ +O _2The generated ozone O ₃ is generated by the thermal and kinetic energy obtained from the discharge, for example, in the arrangement shown in Figure 2, within a fixed time. , while the decomposition reaction described below takes place in the pores of the deodorizing body 2, the chain line
It passes through as shown by the solid arrow and becomes oxygen and diffuses to the outside. As this diffusion occurs, the external malodorous air G
passes through the pores of the deodorizing body 2 as shown by the two-dot chain arrow while adsorbing and concentrating a part of the malodorous components, and enters the space 4.
It is taken into the interior, oxidized, decomposed and odorless, and diffused to the outside, as will be described later. Since the diffusion and uptake are performed slowly in this way, the sealed space around the deodorizer 6 is circulated as a whole over time, and deodorization progresses. Regarding the decomposition reaction of ozone, it decomposes into oxygen and becomes harmless by the time it reaches the surface of the deodorizing body 2 through the following process. That is, (i) self-decomposition reaction (2O ₃ → 3O ₂ ) in the space 4, (ii) ozone adsorbed on the deodorizing body 2 is decomposed by the ozone decomposition catalyst (O ₃ +M→O ₂ +O
+M, M is catalyst). Note that ozone in the space 4 is relatively stable with a half-life of several hours to more than ten hours, and most of it is decomposed during the process (ii).
The amount of ozone generated is related to the applied voltage, the volume of the space, etc., and the amount of ozone decomposed depends on the deodorizing body 2.
Since this depends on the thickness of the deodorizer and the amount of catalyst supported, if these are adjusted appropriately, ozone will not leak out of the deodorizer 6, and a highly concentrated ozone atmosphere can be created in the space 4. The oxidative decomposition and deodorization of the malodorous components is carried out by the following process. That is, (i) gas-phase oxidative decomposition with ozone in the space 4, (ii) oxidative decomposition with ozone or a catalyst after being adsorbed on the deodorizing body 2, (iii) ozone adsorbed on the deodorizing body or decomposition after adsorption. The ozone is decomposed by active species (nascent oxygen O) generated from the ozone, and deodorization progresses mainly through the processes (ii) and (iii). That is, the malodorous components partially adsorbed by the deodorizing body 2 are decomposed through the reaction process (ii). Note that when the oxidative decomposition and deodorization progress and the malodorous components in the malodorous air G are equal to zero, the ozone generated by the electric field device 1 is decomposed by repeating the same reaction as the ozone decomposition reaction. It becomes harmless and spreads outside. 6 to 8 demonstrate through experiments that the air in the sealed space around the deodorizer 6 of the present invention circulates through the deodorizer 6 as described above.
A deodorizer 6 is installed on the lower wall of a sealed box 9 having an internal volume of 15.5 cm as shown in FIG. 9, and potassium iodide-starch paper 10 is pasted on three side walls and the entire top wall, respectively. Next, a high voltage is applied to the electric field device 1 to generate ozone. Since the paper 10 begins to change color from the portion where it comes into contact with ozone, the process of ozone generation and diffusion becomes clear. The results are shown in Figures 6, 7, and 8, where the paper 10, 30, and 60 minutes after applying voltage
The difference in the intensity of discoloration is a, b, c (a<b<c)
It was divided into stages. That is, the generated ozone rises from the left side wall in Fig. 6 and contacts the upper wall, even though its specific gravity is greater than that of air, and then changes direction and contacts the right wall and flows backward and downward. The deodorizer 6 of the present invention is lowered to the wall surface.
Circulation as described above is carried out repeatedly without requiring any means for circulation. The deodorizing effect of the deodorizer 1 of this invention will be explained with reference to FIGS. 9 and 10.
Inside, a deodorizer 6 is installed, in which the thickness of the deodorizer 2 is t=10 mm, and the facing distance between the electric field device 1 and the deodorizer 2 is d=5 mm. The electric field device 1 of the deodorizer 6 is connected to a transformer 12, a slider 13, and a power source 14 via an electric wire 11.
are connected in this order. 15 is a pipe, 16 is a dryer, 17 is a blower, 18 is an exhaust hole, 19 is a measurement hole, and 20 is a stirring blade. After keeping the humidity in the box 9 constant using the dryer 16, high-concentration hydrogen sulfide is sealed in the box 9 using a syringe 21, and then stirred with a blade 20 to maintain a uniform concentration (30~
40ppm). When a voltage of 3.5 KV is applied to the electric field device 1, the hydrogen sulfide removal rate increases as time passes, as shown by the curve in FIG. The curve shows the result when the electric field device 1 is not applied and the other conditions are the same as above, and the curve shows the result when no catalyst is added to the porous filter and when the electric field device 1 is not applied and the other conditions are the same as above. It is.
It is thought that the curve indicates that hydrogen sulfide is adsorbed by the porous filter, and that the removal rate of hydrogen sulfide increases due to the reaction and decomposition of hydrogen sulfide and the catalyst in addition to the adsorption. When an electric field is applied thereto to generate ozone, hydrogen sulfide is decomposed by ozone and active species as described above, and the removal rate of hydrogen sulfide further increases as shown in the curve. The deodorizer 6 of this invention is safe as no ozone leaks out of the deodorizer 6, and this can be demonstrated by the following experiment and table. That is, the deodorizer 6 is installed in the sealed box 9 used in the above experiment. In this experiment, the concentration (ppm) of ozone flowing out of the deodorizer 6 was determined by changing the thickness t of the deodorizer 2, the applied voltage KV, the facing distance d between the electric field device 1 and the deodorizer 2, etc.
was measured. The measurement was carried out through the measurement hole 19 using an ozone gas detection tube. The following table shows the results.

【table】

[Table] The values in the table are the measured values of ozone concentration (ppm) in box 9 after 60 minutes of voltage application. That is, in order to prevent the outflow of ozone, it can be determined based on the appropriate values in the table. In addition, a deodorizer was constructed by using a non-catalyst-treated porous filter with a thickness of 10 mm instead of the deodorizing body, and setting the opposing distance between this and the electric field device to 5 mm, and when an applied voltage of 2.1 KV was applied to this, the
The ozone concentration after 5 minutes was 5.1 ppm. Effects of the Invention As described above, the present invention comprises an ozone generating electric field device, a deodorizing body using a porous filter as a carrier and a catalyst added to the deodorizing body, or the deodorizing body and an insulating non-ventilating body, and the electric field inside the ozone generating electric field device. The deodorizer body is provided with an electric field space for the interior of the device, and the electric field device is installed in the space so as to be able to generate ozone, so it can be easily made smaller and simpler, and its fields of use can be expanded. The effect is great when applied to general households.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional perspective view of the simple deodorizer of the present invention, Fig. 2 is an enlarged cross-sectional view of the An enlarged cross-sectional view, FIG. 5 is a cross-sectional view of another embodiment, Nos. 6, 7,
Fig. 8 is a schematic illustration of the process of ozone generation and diffusion, Fig. 9 is an experimental apparatus for the deodorizer of the present invention, and Fig. 10 is a graph showing the deodorizing effect. 1... Ozone generating electric field device, 2... Deodorizing body, 3
...Insulating non-ventilation material, 4...Electric field space part, 5...
Deodorizer body, 6...Simple deodorizer.

Claims (1)

[Claims] 1. An ozone generating electric field device and a deodorizing body made of a porous filter with continuous pores and excellent adsorption properties as a carrier and treated with an ozone decomposition catalyst, or the deodorizing body and an insulating non-ventilating body. and a deodorizer main body having an electric field space inside for the interior of the electric field device, and the ozone generating electric field device is installed to be able to generate ozone in the electric field space of the deodorizer main body. A simple deodorizer featuring: