Ozone generator

Abstract

To solve a problem of an ozone generator in practical use for space sterilization using ozone gas for measures for virus in a room, in which diffusibility is inhibited due to various obstacles in the room, an installation space of an ozone generator needs to be secured and a noise of the ozone generator needs to be addressed.SOLUTION: By providing an ultraviolet ray attenuation mechanism without using an agitator in an inside of an ozone generator, ultraviolet ray irradiated from the ozone generator is suppressed, safety and quietness are improved, and sterilization and deodorization of a room can be easily performed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an ozone generator. [Background technology]

[0002] Air sterilization and deodorization can be easily achieved by utilizing the oxidizing effect of ozone. Ozone can be generated using oxygen present in the air as a raw material, and ozone is ultimately reduced to oxygen without generating harmful residues. For this reason, ozone generators that can be used in living spaces are becoming widespread. Summary of the Invention [Problem to be solved by the invention]

[0003] Ozone generators are usually installed and used in the space where spatial sterilization, etc. is performed. In order to efficiently disperse ozone in the space, they have an agitator such as a fan motor, and even when ultraviolet rays are used to generate ozone, it is easy to realize a structure that suppresses the exposure of ultraviolet rays to the outside of the ozone generator and releases only ozone. However, when an agitator such as a fan motor is used, noise and reliability of the agitator become problems.

[0004] When configuring an ozone generator without using an agitator such as a fan motor for noise control or reliability improvement, it is necessary to exhaust and diffuse ozone from the ozone generator using limited convection. Therefore, there is a problem that irradiation of the ultraviolet light used for generating ozone to the outside of the ozone generator cannot be suppressed.

[0005] No stirring devices such as fan motors are used, and no harmful strong substances are emitted to the outside of the ozone generator. In order to release ozone without irradiating it with excessive ultraviolet light, it is necessary to reduce the ultraviolet light intensity after the generation of ozone to a level that is harmless to the human body. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention proposes an ozone generator that is safe and quiet, and is composed of an ultraviolet ray generation source 3, a circulation port 6, an ozone passage 4, and an ultraviolet ray attenuation plate 5, and generates ozone 9 in the ozone passage 4 by ultraviolet ray 7 generated by the ultraviolet ray generation source 3, and discharges the ozone 9 from the circulation port 6. The ultraviolet ray 7 that contributed to the generation of ozone is attenuated to a harmless level by the ultraviolet ray attenuation plate 5 provided in the ozone passage 4, and the ultraviolet ray 7 irradiated from the circulation port 6 is also attenuated to a harmless level by the ultraviolet ray attenuation plate 5 provided in the ozone passage 4, and the ozone generator that realizes spatial sterilization is also proposed. Effect of the Invention

[0007] The present invention makes it possible to realize an ozone generator that is safe and quiet. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing the configuration of a lighting device according to an embodiment of the present invention; [Diagram 2] 1 is a cross-sectional view of a lighting device according to an embodiment of the present invention; [Diagram 3] Ozone generation and UV path diagram in one embodiment of the present invention [Figure 4] Conditions for evaluating ozone performance in one embodiment of the present invention [Diagram 5] Conditions for evaluating ozone performance in one embodiment of the present invention [Figure 6] Conditions for evaluating ozone performance in one embodiment of the present invention [Figure 7] Ozone performance evaluation results in one embodiment of the present invention [Figure 8] The relationship between the amount of UV exposure and the duration of exposure that is generally considered to have no effect on the human body [Figure 9] FIG. 1 is a block diagram of a sterilization and deodorization system according to an embodiment of the present invention. [Figure 10] Evaluation results of the sterilization and deodorization system according to one embodiment of the present invention [Figure 11] Evaluation results of the sterilization and deodorization system according to one embodiment of the present invention [Figure 12] Evaluation results of the sterilization and deodorization system according to one embodiment of the present invention [Figure 13]Evaluation results of the sterilization and deodorization system according to one embodiment of the present invention DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] FIG. 1 shows an ozone generator 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the ozone generator 1 shown in FIG.

[0011] The ultraviolet light 7 generated by the ultraviolet light source 3 has a wavelength that generates ozone, and the ultraviolet light source 3 is composed of an ultraviolet light lamp 31 and a lamp case 32, and the lamp case 32 has an ultraviolet light irradiation port 33. It is preferable that the ultraviolet light lamp 31 for generating ozone has both wavelengths of 185 nm and 253.7 nm or only a wavelength of 185 nm.

[0012] 3 is a diagram showing ozone generation and ultraviolet ray paths in an embodiment of the present invention. The ozone passage 4 is a space connecting two circulation ports 6, and has an ultraviolet ray attenuation plate 5 installed inside, and is separated from the ultraviolet ray generation source 3 by an ultraviolet ray lamp case 32. The ultraviolet ray 7 generated by the ultraviolet ray lamp 31 is irradiated into the ozone passage 4 through an ultraviolet ray irradiation port 33 installed in the ultraviolet ray lamp case 32, and ozone 9 is generated from oxygen 8 present in the ozone passage 4. The generated ozone is discharged to the outside of the ozone generator 1 from the circulation port 6, and new oxygen 8 is supplied from the circulation port 6 to the inside of the ozone passage 4 of the ozone generator 1, and the indoor space is continuously sterilized and deodorized by the circulation of the ozone 9 and oxygen 8.

[0013] In this configuration, when used in a closed room, the ozone generator 1 does not have a stirring device, so the diffusion speed of the discharged ozone is slow. Therefore, the ozone concentration becomes high near the ozone generator 1, and the oxygen concentration decreases, so the amount of oxygen supplied to the ozone generator 1 decreases, and the amount of ozone generated decreases. As a result, the amount of ozone generated is limited according to the diffusion speed of ozone. By eliminating the stirring device, the amount of ozone generated can be expected to automatically adjust.

[0014] Ozone generator 1 at 45m 3 1 unit in the room, 90m 3 2 units on the ceiling of the room, 120m 3 Three units were installed in a room, and after 12 hours of continuous operation, the ozone concentration was measured at each measurement point shown in Figures 4, 5, and 6. The results shown in Figure 7 show that the ozone generator 1 in this embodiment can diffuse ozone 9 throughout the room. It can also be seen that rooms of various volumes can be accommodated by determining the number of ozone generators 1 according to the room volume. In this measurement, a gas sampler GV-100 manufactured by Gastec Corporation and an 18L ozone detector tube were used.

[0015] The ultraviolet rays 7 irradiated from the ozone generator 1 into the room must be kept at a level that is not harmful to the human body. The impact on the human body is considered based on the safety standard values ​​established by the American Conference of Officials in Industrial Hygiene, and the relationship between the amount of ultraviolet exposure and the duration of exposure is shown in Figure 8. The ultraviolet intensity at the circulation port 6 in the absence of the ultraviolet irradiation slit 34 and the ultraviolet attenuation plate 5 in Figures 1, 2, and 3 is 1.6 μW / cm. 2 It is judged that 30 minutes of use will have an effect on the human body. In order to efficiently suppress the ultraviolet light intensity to a level that is harmless to the human body, an ultraviolet light irradiation slit 34 and an ultraviolet light attenuation plate 5 are necessary. It is preferable to use a black material to obtain a sufficient ultraviolet light attenuation rate, but since the material is continuously exposed to ozone 9 and ultraviolet light 7, care must be taken when selecting a suitable material. In this embodiment, an aluminum material that has been black anodized was used. As a result, the ultraviolet light intensity at the circulation port when an ultraviolet light attenuation plate 5 made of an aluminum plate that has been black anodized was The degree is 0.004μW / cm 2 This means that there is no effect on the human body.

[0016] The configuration of this embodiment makes it possible to suppress the intensity of ultraviolet rays irradiated from the ozone generator 1 to a level that is harmless to the human body, while ensuring the ozone concentration necessary for space sterilization. It can be achieved.

[0017] As an example of the use of the ozone generator 1 according to the present invention, an evaluation was carried out using a sterilization and deodorization system shown in FIG.

[0018] As shown in Fig. 9, the ozone generator 1 of this embodiment is used as the sterilization and deodorization device 101 of the indoor sterilization and deodorization system, and a wall-mounted package air conditioner is used as the air conditioner 102, which has an intake port 103 on the top and sides and an exhaust port 104 on the bottom. Ozone is widely used for sterilization and deodorization purposes, and usually ozone generators are often used in relatively low places indoors, such as on the floor or on a table, but in order to efficiently sterilize the inside of the air conditioner 102, it is desirable to install it on the ceiling or wall near the intake port 103 of the air conditioner 102, and in this example, the ozone generator was installed on the ceiling.

[0019] The operating modes of the air conditioner 102 include stop, fan, cooling, heating, and dehumidification. The basic principle is the same in dehumidification and cooling operations, in which the temperature of the air taken into the air conditioner 102 is lowered and the moisture in the air is removed and then the air is released to the outside. For this reason, the installation distance between the air conditioner 102 and the sterilization and deodorization device 101 was changed during fan operation, cooling operation, and heating operation, and the ozone concentration was measured in the indoor space 105, the air intake 103 and exhaust 104 of the air conditioner 102, and near the sterilization and deodorization device 101, and only the indoor ozone concentration was measured when the air conditioner 102 was stopped. The measurement results are shown in Figures 10 to 13.

[0020] From this result, when the air conditioner 102 was stopped, the average ozone concentration in the indoor space 5 was about 0.05 ppm, regardless of the installation distance between the air conditioner 102 and the sterilization and deodorization device 101. Since it is said that viruses can be inactivated at an ozone concentration of 0.025 ppm and that ozone concentrations of 0.1 ppm or less have no harmful effects on the human body, it can be said that there is no problem with the space sterilization ability when the air conditioner is stopped.

[0021] The average ozone concentration in the indoor space 105 during air blowing and heating operation of the air conditioner 101 increased as the distance between the air conditioner 102 and the sterilization and deodorization device 101 decreased, and increased as the distance increased, approaching the concentration when the air conditioner was stopped. This is because the shorter the distance between the air conditioner 102 and the sterilization and deodorization device 101, the greater the influence of convection by the air conditioner 102 becomes compared with the ozone concentration near the air intake 103 and exhaust 104 of the air conditioner 102 and the ozone concentration near the sterilization and deodorization device 101, and a lot of ozone is taken in by the air conditioner 102, and the ozone concentration near the sterilization and deodorization device 101 decreases, causing a relative increase in oxygen, resulting in an increase in the amount of ozone generated by the sterilization and deodorization device 101, and the amount of ozone consumed inside the air conditioner 102 is small.

[0022] When the air conditioner 102 is in cooling operation, the average ozone concentration in the indoor space 105 drops significantly. This is because there is a large difference in ozone concentration near the air intake 103 and exhaust 104 of the air conditioner 102 compared to when the air conditioner is in blowing or heating operation, and because the shorter the distance between the air conditioner 102 and the sterilization and deodorization device 101 is, the lower the indoor average concentration is, and therefore ozone is consumed inside the air conditioner 102.

[0023] From the results of this example, it is predicted that the average ozone concentration in the indoor space 5 will fall below 0.025 ppm when the distance between the air conditioner 102 and the sterilization and deodorization device 101 during cooling operation is less than 0.5 m, and at 2.0 m the ozone concentration near the exhaust port 104 of the air conditioner 101 will fall below 0.025 ppm. Therefore, by installing the air conditioner 102 and the sterilization and deodorization device 101 at a distance of 0.5 m or more and 1.5 m or less, it is possible to achieve both sterilization and deodorization of the inside of the air conditioner 2 and the indoor space 105 by the sterilization and deodorization device 101. [Explanation of symbols]

[0024] 1. Ozone generator 2. Control device 3. UV Sources 31. Ultraviolet lamp 32....Ultraviolet lamp case 33...Ultraviolet light outlet 34...UV irradiation slit 4. Ozone passage 5. UV attenuation plate 6...Circulation port 7. Ultraviolet Rays 8. Oxygen 9. Ozone 101....Sterilization and deodorization equipment 102...Air conditioner 103 Air intake 104...Exhaust port 105...indoor space

Claims

1. An ozone generating apparatus comprising: an ozone generating unit, the ozone generating unit having an ultraviolet ray generating source and an ozone passage, the ozone passage being separated from the ultraviolet ray generating source, the ozone passage having a circulation port and an ultraviolet ray attenuation plate.

2. 2. The ozone generator according to claim 1, further comprising an ultraviolet lamp case, said ultraviolet source and said ozone passage being separated by said ultraviolet lamp case, said ultraviolet lamp case being provided with a plurality of slits as ultraviolet irradiation ports.

3. 2. The ozone generator according to claim 1, which is embedded in a ceiling or wall.

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