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 properties of ozone. Ozone can be generated using oxygen present in the air as a raw material, and is ultimately reduced to oxygen without generating any 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 typically installed in spaces where sterilization is to be performed. They have an agitator such as a fan motor to efficiently disperse ozone within the space. Even when ultraviolet light is used to generate ozone, it is easy to create a structure that suppresses UV radiation from the ozone generator and only emits ozone. However, when an agitator such as a fan motor is used, noise and reliability become issues.

[0004] When configuring an ozone generator without using a stirring device such as a fan motor for noise control and reliability improvement, it is necessary to use limited convection to exhaust and diffuse ozone from the ozone generator. Therefore, there is a problem that the irradiation of 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 air is emitted outside the ozone generator. In order to release ozone without irradiating it with excessive ultraviolet light, it is necessary to reduce the ultraviolet light after ozone generation to a level that is harmless to the human body. [Means for solving the problem]

[0006] To solve the above problems, we propose an ozone generator that is safe and quiet, and that achieves spatial sterilization, and is composed of an ultraviolet source 3, a circulation port 6, an ozone passage 4, and an ultraviolet attenuation plate 5, and that generates ozone 9 in the ozone passage 4 using ultraviolet rays 7 generated by the ultraviolet source 3, and then discharges the ozone 9 from the circulation port 6. The ultraviolet rays 7 that contributed to the generation of ozone are attenuated to a harmless level by the ultraviolet attenuation plate 5 provided in the ozone passage 4, and the ultraviolet rays 7 irradiated from the circulation port 6 are attenuated to a harmless level by the ultraviolet attenuation plate 5 provided in the ozone passage 4. [Effects of the Invention]

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

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

[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 rays 7 generated by the ultraviolet source 3 have a wavelength that generates ozone, and the ultraviolet source 3 is composed of an ultraviolet lamp 31 and a lamp case 32, and the lamp case 32 has an ultraviolet irradiation port 33. It is preferable that the ultraviolet 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 light paths in an embodiment of the present invention. Ozone passage 4 is a space connecting two circulation ports 6, and has an ultraviolet attenuation plate 5 installed inside. It is separated from the ultraviolet source 3 by an ultraviolet lamp case 32. Ultraviolet light 7 generated by ultraviolet lamp 31 passes through ultraviolet irradiation port 33 installed in ultraviolet lamp case 32 and is irradiated into the inside of ozone passage 4, generating ozone 9 from oxygen 8 present in ozone passage 4. The generated ozone is released to the outside of ozone generator 1 through circulation port 6, and new oxygen 8 is supplied from circulation port 6 into ozone passage 4 of ozone generator 1. The circulation of ozone 9 and oxygen 8 continuously sterilizes and deodorizes the indoor space.

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

[0014] Ozone generator 1 45m 3 1 unit in the room, 90m 3 Two 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 example can diffuse ozone 9 throughout the room. It also shows that rooms of various volumes can be accommodated by determining the number of ozone generators 1 according to the room volume. The measurements were carried out using a gas sampler GV-100 manufactured by Gastec Corporation and an 18L ozone detector tube.

[0015] The ultraviolet light 7 emitted from the ozone generator 1 into the room must be kept at a level that is harmless to the human body. The impact on the human body is considered based on the safety standard values ​​established by the American Conference of Government Occupational Hygienists, and the relationship between the amount of ultraviolet light exposure and exposure time is shown in Figure 8. When the ultraviolet light irradiation slit 34 and ultraviolet light attenuation plate 5 in Figures 1, 2, and 3 are not present, the ultraviolet light intensity at the circulation port 6 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 intensity to a level that is harmless to the human body, an ultraviolet irradiation slit 34 and an ultraviolet attenuation plate 5 are necessary. To obtain a sufficient ultraviolet attenuation rate, it is desirable to use a black material, but since the material is continuously exposed to ozone 9 and ultraviolet rays 7, care must be taken in selecting a suitable material. In this example, an aluminum material that has been subjected to black anodizing treatment was used. As a result, when an ultraviolet attenuation plate 5 made of an aluminum plate that has been subjected to black anodizing treatment is used, the ultraviolet intensity at the circulation port The intensity 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 emitted 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] The ozone generator 1 of this embodiment is used as the sterilization and deodorization device 101 of the indoor sterilization and deodorization system shown in Figure 9, and a wall-mounted package air conditioner is used as the air conditioner 102, which has air intakes 103 on the top and sides and an exhaust vent 104 on the bottom. Ozone is widely used for sterilization and deodorization purposes, and although ozone generators are usually installed in relatively low places indoors, such as on the floor or on a table, in order to efficiently sterilize the inside of the air conditioner 102, it is desirable to install the ozone generator on the ceiling or wall near the air intake 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 during dehumidification and cooling operations: the temperature of the air taken into the air conditioner 102 is lowered, the moisture in the air is removed, and the air is then 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. When the air conditioner 102 was stopped, only the ozone concentration in the room was measured. The measurement results are shown in Figures 10 to 13.

[0020] From these results, when the air conditioner 102 was stopped, the average ozone concentration in the indoor space 5 was approximately 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 do not have a harmful effect 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 when the air conditioner 101 is operating in ventilation and heating mode increased as the distance between the air conditioner 102 and the sterilization and deodorization device 101 decreased, and as the distance increased, the average ozone concentration in the indoor space 105 increased, and as the distance increased, the concentration approached 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, compared to the ozone concentration near the air intake 103 and exhaust vent 104 of the air conditioner 102 and the ozone concentration near the sterilization and deodorization device 101, and more ozone is taken in by the air conditioner 102, which decreases the ozone concentration near the sterilization and deodorization device 101 and relatively increases the oxygen concentration, resulting in an increase in the amount of ozone generated by the sterilization and deodorization device 101 and a decrease in the amount of ozone consumed inside the air conditioner 102.

[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 it is in fan or heating operation, and because the shorter the distance between the air conditioner 102 and the sterilization and deodorization device 101, the lower the indoor average concentration, 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 when the distance is 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 for the sterilization and deodorization device 101 to sterilize and deodorize both the inside of the air conditioner 2 and the indoor space 105. [Explanation of symbols]

[0024] 1. Ozone generator 2. Control device 3. UV Source 31. Ultraviolet lamp 32. Ultraviolet lamp case 33. Ultraviolet irradiation port 34. Ultraviolet 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 generator comprising an ozone generating unit, the ozone generating unit having an ultraviolet light generating source and an ozone passage, the ozone passage being separated from the ultraviolet light generating source, the ozone passage having a circulation port and an ultraviolet light attenuation plate.

2. 2. The ozone generator according to claim 1, further comprising an ultraviolet lamp case, the ultraviolet source and the ozone passage being separated by the ultraviolet lamp case, and the 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 installed in a ceiling or wall.

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