JPH03285802A - Ozonizer - Google Patents

Abstract

PURPOSE:To remove generated ozone from an electric discharge field and to efficiently generate ozone by providing the inlet and outlet for a raw gas, a power source circuit, a discharge electrode and a counter electrode to a case and combining the members to produce a specified effect. CONSTITUTION:A raw gas inlet 11 having a filter 12 is provided on the left or right side face of a case 10, and an outlet 13 having a fan for discharging the gas in the case 10 to the outside is furnished on the upper or lower face. A power source circuit 20 for converting a commercial power source into a high-voltage and high-frequency power source is provided in the case 10, and a discharge electrode 32 to be connected to the power source circuit 20 is furnished on the periphery of a horizontal cylindrical dielectric 31. The discharge electrode and a discharge reaction electrode 30 provided with a counter electrode 33 to be connected to the power source circuit 20 are horizontally arranged in the cylinder. This ozonizer is constituted in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an ozone generator, in particular a compact,
This invention relates to a simple discharge type ozone generator.

``Conventional technology'' Conventionally, the third type of compact, simple discharge-type ozone generator was developed.
Something like the one shown in the figure has been proposed.

The conventional example shown in Fig. 3 has a dielectric plate 31° within the 10° gas flow path.
A discharge electrode 32' is arranged on one side of this dielectric plate 31°, and a mating electrode 33' is arranged on the other side.
1° and the opposite electrode 33° are respectively connected to a power supply circuit 20" which is arranged outside the gas flow path 10' and converts commercial power into a high voltage/high frequency power supply, and this power supply circuit 2
When a high voltage and high frequency power source is applied between the dielectric plate 31" and the opposite electrode 33° due to 0°, a creeping discharge occurs on the surface of the dielectric plate 31", and the discharge in the raw material gas flowing in the gas flow path 10' is generated. Oxygen is turned into ozone by this creeping discharge.

``Problems to be Solved by the Inventionj'' However, it has been pointed out that this type of small-sized ozone generator has very low efficiency compared to large-sized devices.

Since it is a small device, the power supply has to be compact, and as a result, the power output is small (and cannot generate high concentration ozone), but in actual prototype production, the consumption It was found that the ozone generation rate with respect to electric power was extremely low in small equipment compared to large equipment.

Therefore, the inventor of the present invention diligently investigated the cause of the above-mentioned low efficiency and found that the main cause may be that the gas flow velocity is set slower in small equipment than in large equipment due to the small IT power output. I ended up doing it. It is said that the time required for oxygen to be ozonated in the discharge field is instantaneous, and generally, a high frequency power source of 3 to 10 KHz is used even in this type of small equipment, and as this frequency is raised, the ozonation efficiency increases. There also seems to be a commonly accepted theory that ozonation progresses and completes when the applied voltage rises, and that the electrical energy that is subsequently applied at a constant voltage is not effectively consumed for ozonation. That is, it is necessary to immediately extract the ozone generated in the discharge field from the discharge field and bring new raw material gas into contact with the discharge field to improve efficiency. In the conventional example shown in Fig. 3, the ozone generated on the upstream side is It moves along with the flow of raw material gas through the discharge field to the downstream side, which not only reduces the chance that oxygen will be newly converted into ozone, but also causes the generated ozone to enter the discharge field. By staying for a relatively long time,
It is also possible to predict with a high probability that it will be re-decomposed by the energy of the discharge field.

Therefore, it is possible to improve efficiency by increasing the flow rate of the raw material gas.In the conventional example shown in Figure 3, when air is used as the R feed gas and the flow rate is tripled, the efficiency is as high as 100%. I was able to measure the improvement. However, unnecessarily increasing the flow rate may result in obtaining a large amount of low-concentration ozone, which may not meet the intended use.To solve this problem, increase the flow rate only in localized areas near the discharge reaction electrode body. A special flow rate adjustment mechanism is required, and it is also possible to simply increase the flow rate. Additional equipment is required, which is undesirable for small devices, such as increasing the size of the I-equipment.

In addition, starting from the conventional example shown in FIG. 3, the power supply section is visually constructed separately. The power supply unit has heat generating sources such as resistors and transformers, and ozone decomposes when heated, so a separate power supply unit is provided, although consideration has been given to extracting the generated ozone in as stable a state as possible. This is a major hindrance to downsizing.

Therefore, the present invention was devised in view of the above-mentioned drawbacks, and by increasing the flow velocity, the shape of the discharge reaction electrode body and the flow direction of the raw material gas are set rationally, and the generated ozone is immediately removed from the discharge field. The purpose is to provide an efficient ozone generator.

Another object of the present invention is to provide an ozone generator in which a power supply section and a discharge reaction electrode body are housed in one case, thereby achieving miniaturization and minimizing the effects of the power supply section being crowded. It is intended to provide.

"Means for Solving the Problems" In line with the above object, the configuration of the present invention, which has the gist of the above-mentioned claims, is to solve the problems described above.
A raw material gas inlet 11 with a filter 12 is provided on either the left or right side of the case body 10, and a raw material gas inlet 11 with a filter 12 is provided on one side of the case body 10
A discharge port 13 is provided with a fan 14 for discharging the gas inside to the outside. Inside the case body 10, there is a power supply circuit 20 for converting commercial power into high voltage/high frequency power, and a cylindrical shape arranged horizontally. A discharge reaction electrode body 30 is provided with a discharge electrode 32 connected to the power supply circuit 2o on the outer peripheral surface of the dielectric body 31, and a counterpart electrode 33 connected to the power supply circuit 20 in the cylindrical portion. This technical means is characterized by the fact that they are housed side by side in the horizontal direction.

"Operation" Therefore, in the ozone generator of the present invention, when the fan 14 is operated, the gas in the case body 10 is discharged from the discharge 2013, and the raw material gas (air is used in the illustrated embodiment, but oxygen is also used). (of course, there is no problem) flows in from the raw material gas inlet 11. That is, in FIG. 2, when the fan 14 blows air upward, inside the case body 10,
A vertical upward flow will be generated, but since the raw material gas inlet 11 does not face the outlet 13, the raw material gas flows in a horizontal direction, and in the middle it changes to a vertical upward flow in a chain line shape. A flow of gas will be generated. When this gas flow is observed locally at the discharge reaction electrode body 30, the gas flowing in from the side or diagonal direction collides with or approaches each part and changes the flow direction vertically upward. Therefore, due to this change in flow direction, the discharge electrode 32
The flow of gas flowing along the discharge field decreases, and the source gas exhibits the effect of immediately leaving the discharge field after coming into contact with the discharge field.

Furthermore, when observing the above gas flow at the power supply circuit 20, efficient cooling is performed by the gas flow in the same flow direction as above, preventing resistance etc. from generating heat, and the generated thermal energy is transferred to nearby areas. Discharge reaction electrode body 30ff due to upward flow
It will be discharged from the outlet 13 without moving to the position.

Further, since the discharge reaction electrode body 30 is formed by disposing the discharge electrode 32 on the outer peripheral surface of a cylindrical dielectric body 31 disposed in the horizontal direction, even if only an upward flow exists in the temporary case body 10, Although the upward flow may flow along the half circumferential surface at the cross section, the distance is short, so the contact time between the discharge field and the raw material gas is short, and the raw material gas can avoid long-term contact with the discharge field. It is something that exhibits.

Embodiment 1 Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 10 is a case body, and a raw material gas inlet 11 having a filter 12 on either the left or right side of the case body 10 is used to discharge the gas inside the case body 10 to the outside on either the top or bottom side. An outlet 13 with a fan 14 is provided.

There are no particular restrictions on the shape of the case body 10, but in the illustrated example it is cubic, with a raw material gas inlet 1 on the left side.
1, a discharge port 13 is provided on the upper surface, and the raw material gas inlet 11 and discharge port 13 are provided on surfaces that are perpendicular to each other. In addition, the filter 12 and the fan 1
Reference numeral 4 uses a conventionally known one, and the structural parts for its attachment are omitted in the figure, but it goes without saying that conventionally known attachment methods such as screws for fastening can be used. In addition, in the illustrated example,
This fan 14 has blower blades 14b that are rotated by an electric motor 14a, and if necessary, a safety cover such as a wire mesh is provided.
4c is provided.

In the case body 10, a commercial power source is connected to a high voltage.
A power supply circuit 20 for converting into a high frequency power supply and a discharge electrode 32 connected to the power supply circuit 20 are arranged on the outer peripheral surface of a horizontally arranged cylindrical dielectric 31, and a discharge electrode 32 connected to the power supply circuit 20 is provided in the cylindrical portion. A discharge reaction electrode body 30 provided with a mating electrode 33 to be connected is housed side by side in the horizontal direction.

The power supply circuit 2o is not shown in the drawings because it can be any conventionally known circuit as long as it converts the commercial power source into a high voltage/high frequency power source. This DC current is converted into a high frequency current using a frequency conversion circuit consisting of a diode and a capacitor, and then the voltage is boosted using a transformer.

Further, in the discharge reaction electrode body 30, a cylindrical ceramic having a dielectric constant of 5 to 10 is used as the dielectric body 31, and a conductive wire is spirally wound around the outer peripheral surface of the dielectric body 31 as a discharge electrode 32. Further, a rod-shaped mating electrode 33 is fitted into the central cavity of the dielectric 31, and the discharge electrode 32 and the mating electrode 33 are connected to the power supply circuit 20, respectively.

Then, the power supply circuit 20 and the discharge reaction electrode body 30 are connected to each other.
Storing them side by side means arranging them so that they do not overlap vertically. In the figure, they are arranged at approximately the same height, but all of the discharge reaction electrode bodies 30 do not overlap vertically. If it is, the vertical positional relationship between the two does not pose a particular problem.

In the figure, 1 is a power outlet, 2 is a fuse, 3 is a power switch (the illustrated example uses a residual contact type push button switch), and 4 is a TFI lamp, which is located on one side of the power outlet 1. After connecting the fuse 2 and the power switch 3 in series to the circuit C1, connect it to one side input terminal of the power supply circuit 20, and connect the other side circuit of the power outlet 1 to the 02
is directly connected to the other input terminal of the power supply circuit 20. Further, as shown in FIG. 2, the fan 14 and the power lamp 4 are connected in parallel to the output side portion of the power switch 3 of the left side circuit C1 and the other side circuit C2, respectively.

Since the present invention is as described above, the time during which the raw material gas contacts the discharge field of the electric reaction electrode body 30 is short, and new raw material gas is always in contact with the discharge field, resulting in efficient ozone generation. The device can be provided.

In particular, in the present invention, the raw material gas inlet 11 and the outlet 13 are not set in opposite directions, but are provided on one side of either the left or right side and one surface of the upper or lower side, so that the raw material gas changes its flow direction midway. , the raw material gas does not flow in the discharge field for a long time along the discharge reaction electrode body 30, and the discharge reaction electrode body 30 is made into a cylindrical shape, and this cylindrical discharge reaction electrode body 30 is However, since the discharge reaction electrode body 30 is arranged in a horizontal direction, the discharge reaction electrode body 30 is located at a portion where the raw material gas flowing horizontally from the raw material gas inlet 11 changes into an upward flow toward the outlet 13, so that the raw material gas is further It is possible to provide an ozone generator that can shorten the time of contact with a discharge field.

Furthermore, in the present invention, due to the flow of the raw material gas as described above, new raw material gas always comes into contact with the power supply circuit 20, thereby exhibiting an efficient cooling effect. Accordingly, it is possible to provide an ozone generator that can greatly contribute to compactness without causing a decrease in ozone generation efficiency.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of the ozone generator of the present invention, FIG. 2 is a vertical cross-sectional view, and FIG. 3 is a vertical cross-sectional view of a conventional device. 10 - case body 12 - filter 14 - fan 30 - discharge reaction electrode body 32 - discharge electrode

Claims (1)

[Claims] A filter 1 is provided on either the left or right side of the case body 10.
2, and an outlet 13 having a fan 14 for discharging the gas inside the case body 10 to the outside is provided on either the upper or lower side. A power supply circuit 20 for converting into a high voltage/high frequency power supply, and a discharge electrode 32 connected to the power supply circuit 20 are arranged on the outer peripheral surface of a horizontally arranged cylindrical dielectric 31, and the power supply An ozone generator characterized in that a discharge reaction electrode body 30 provided with a counterpart electrode 33 connected to a circuit 20 is housed side by side in the horizontal direction.