JP2022031589A - Sterilizer - Google Patents

Abstract

To provide a sterilizer that can prevent the discharge of ozone.SOLUTION: A sterilizer 1 has a passage formation part 5 that forms an air passage 4 to communicate between an air inlet 2 and an air outlet 3, and a germicidal lamp 7 that is provided in an external storage 6 of the passage formation part 5 and radiates ultraviolet rays. The passage formation part 5 has an ultraviolet passage part 8 that allows ultraviolet rays to pass therethrough. The ultraviolet rays from the germicidal lamp 7 pass through the ultraviolet passage part 8 to impinge on the air flowing in the air passage 4, making it possible to prevent the discharge of ozone.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fluid sterilizer by ultraviolet irradiation.

Conventionally, various sterilizing devices for fluids by irradiating ultraviolet rays have been developed. For example, in the sterilizing apparatus 100 of Patent Document 1, as shown in FIG. 7, a duct 104 through which sterilizing air flows is provided, an ultraviolet lamp 106 is provided at the center thereof, and the duct 104 includes a center line in the axial direction thereof. It is divided into two by a plane, and one set of a plurality of baffle plates is arranged in parallel in each of the two divided internal spaces, and the first set and the second set of a plurality of baffle plates 108-1 are provided. Each of ~ 108-n and 109-1 to 109-n is arranged with angles α and minus α with respect to the plane orthogonal to the dividing plane, and these baffle plates are viewed from the direction in which the dividing plane is viewed from the front. A plurality of X-shapes are arranged so as to be continuous, and a partition plate 110-is placed on both sides of a plurality of diamond-shaped spaces formed by these baffles on a divided plane, avoiding each ultraviolet lamp. 1a to 110- (n + 1) a and 110-1b to 110- (n + 1) b are provided. In the figure, reference numeral 105a is an intake port and 105b is an exhaust port.

By the way, in the conventional sterilizer 100, ozone is generated in the vicinity of the ultraviolet lamp 106, and this ozone may be discharged. Ozone discharged from the sterilizer 100 diffuses into the room where the sterilizer 100 is installed, and may adversely affect the human body and the like.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sterilizer capable of preventing ozone emission.

The present invention includes a passage forming portion that forms a fluid passage that communicates the suction port and the discharge port, and an ultraviolet radiation portion that is provided outside the passage forming portion and emits ultraviolet rays, and the passage forming portion is provided. The present invention relates to a sterilizer having an ultraviolet ray transmitting portion for transmitting ultraviolet rays, and the ultraviolet rays from the ultraviolet emitting portion are transmitted through the ultraviolet ray transmitting portion and irradiated to a fluid flowing in the fluid passage.

According to the present invention, the passage forming portion is provided with a passage forming portion forming a fluid passage communicating the suction port and the discharging port, and an ultraviolet radiating portion provided outside the passage forming portion and radiating ultraviolet rays. The unit has an ultraviolet transmitting portion that transmits ultraviolet rays, and the ultraviolet rays from the ultraviolet radiating portion pass through the ultraviolet transmitting portion and irradiate the fluid flowing in the fluid passage, so that the ultraviolet radiating portion and the fluid It is completely separated from the passage except for the point of UV transmission.

Therefore, even if ozone is generated in the vicinity of the ultraviolet radiating portion, there is no possibility that this ozone is discharged into the fluid passage. Therefore, the ozone discharged from the sterilizer does not diffuse into the room where the sterilizer is installed and has an adverse effect on the human body or the like.

As in the invention according to claim 2, it is preferable to further include an accommodating portion for airtightly accommodating the ultraviolet radiating portion.

According to the second aspect of the present invention, since the accommodating portion for tightly accommodating the ultraviolet radiating portion is further provided, even if ozone is generated in the vicinity of the ultraviolet radiating portion, the ozone is confined in the accommodating portion. Therefore, it can be surely prevented from spreading indoors.

As in the invention according to claim 3, it is preferable that a reflecting surface for reflecting ultraviolet rays from the ultraviolet radiating portion toward the fluid passage is provided.

According to the third aspect of the invention, since the reflecting surface for reflecting the ultraviolet rays from the ultraviolet radiating portion toward the fluid passage is provided, the ultraviolet rays from the ultraviolet radiating portion are used as the fluid flowing in the fluid passage. It can be irradiated efficiently and the fluid can be sterilized efficiently.

As in the invention of claim 4, it is preferable that the inner surface of the passage forming portion reflects ultraviolet rays.

According to the invention of claim 4, since the inner surface of the passage forming portion reflects ultraviolet rays, the ultraviolet rays from the ultraviolet radiating portion can be efficiently applied to the fluid flowing in the fluid passage, and the fluid can be sterilized efficiently. ..

As in the invention of claim 5, it is preferable that the fluid passage is meandering.

According to the invention of claim 5, since the fluid passage is meandering, the passage forming portion can be miniaturized. As a result, it is possible to realize a sterilizer that is compact and can efficiently sterilize fluid.

According to the present invention, the passage forming portion is provided with a passage forming portion forming a fluid passage communicating the suction port and the discharging port, and an ultraviolet radiating portion provided outside the passage forming portion and radiating ultraviolet rays. The unit has an ultraviolet transmitting portion that transmits ultraviolet rays, and the ultraviolet rays from the ultraviolet radiating portion pass through the ultraviolet transmitting portion and irradiate the fluid flowing in the fluid passage, so that the ultraviolet radiating portion and the fluid It is completely separated from the passage except for the point of UV transmission.

Therefore, even if ozone is generated in the vicinity of the ultraviolet radiating portion, there is no possibility that this ozone is discharged into the fluid passage. Therefore, the ozone discharged from the sterilizer does not diffuse into the room where the sterilizer is installed and has an adverse effect on the human body or the like.

It is a perspective view which shows the whole structure of the sterilizer which concerns on one Embodiment of this invention. It is an exploded perspective view of this sterilizer. It is a top view of this sterilizer. It is a side view of this sterilizer. It is XX sectional view in the plan view of this sterilizer. It is an electric circuit diagram of this sterilizer. It is a perspective view which shows the whole structure in an example of the conventional sterilizer.

FIG. 1 is a perspective view showing the overall configuration of the sterilizer 1 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the sterilizer 1, FIG. 3 is a plan view of the sterilizer 1, and FIG. 4 is the sterilizer. It is a side view of the apparatus 1, (a) shows the front surface, (b) shows the rear surface. Further, FIG. 5 is a cross-sectional view taken along the line XX in FIG. Hereinafter, typical components of a plurality of existing components will be described.

As shown in FIGS. 1 to 5, the germicidal lamp 1 includes a passage forming portion 5 that forms an air passage 4 as a fluid passage that communicates an intake port 2 as an intake port and an exhaust port 3 as an exhaust port. , A germicidal lamp 7 is provided in an accommodating portion 6 outside the passage forming portion 5 and is provided as an ultraviolet emitting portion for radiating ultraviolet rays. The ultraviolet rays from the lamp 7 pass through the ultraviolet transmitting portion 8 and are irradiated to the air as a fluid flowing in the air passage 4.

The passage forming portion 5 is a metal box body having an opening at the upper side, and has a rectangular bottom plate 51 and a front wall 52, a rear wall 53, a left wall 54, and a right wall erected on the four sides of the bottom plate 51, respectively. It consists of 55. The box body shields ultraviolet rays. An intake port 2 is arranged on the left side of the front wall 52, and an exhaust port 3 is arranged in the center of the rear wall 53. A plurality of partition plates 56 extending from the left wall 54 to the front of the right wall 55 and a plurality of partition plates 57 extending from the right wall 55 to the front of the left wall 54 are alternately arranged at predetermined intervals. As a result, an air passage 4 that meanders between the intake port 2 and the exhaust port 3 and communicates the two is formed. Further, the inner surface of the passage forming portion 5 constitutes a reflecting surface of ultraviolet rays. The surfaces of the plurality of partition plates 56 and 57 form a reflection surface of ultraviolet rays. An ultraviolet ray transmitting portion 8 made of, for example, quartz glass is covered with an opening above the passage forming portion 5.

The accommodating portion 6 is a metal lid that is expanded downward, and is provided vertically or inclined on the four sides of a rectangular ceiling plate 61 that is narrower than the passage forming portion 5 and the ceiling plate 61, respectively. It is composed of a front wall 62, a rear wall 63, a left wall 64, and a right wall 65. The lid shields ultraviolet rays. Sockets 71 and 72 for attaching the germicidal lamp 7 in the front-rear direction are vertically installed on the ceiling plate 61. Further, the inner surface of the accommodating portion 6 also constitutes a reflecting surface of ultraviolet rays.

As shown in FIG. 2, the accommodating portion 6 in which the germicidal lamp 7 is attached to the sockets 71 and 72 is connected to the opening above the passage forming portion 5 via a gasket (not shown) and the ultraviolet ray transmitting portion 8 with a screw or the like. By fixing, when the present sterilizer 1 is assembled, it becomes as shown in FIG. 1, and the airtightness in the accommodating portion 6 can be maintained.

An intake fan 9 for taking in outside air is attached to the intake port 2. The intake fan 9 is, for example, a fan (DC fan) driven by a DC motor, and by controlling the rotation speed of the intake fan 9, the amount of air flowing in the air passage 4 and the wind speed can be adjusted. It has become. Further, the intake fan 9 is preferably one capable of controlling the rotation direction. This is because an exhaust fan is not attached to the exhaust port 3, but it can be used as an exhaust fan by switching the rotation direction of the intake fan 9.

The germicidal lamp 7 is, for example, a mercury lamp, and the germicidal lamp 7 emits ultraviolet rays having a wavelength of 100 to 280 nm, which is called UV-C. Of these, ultraviolet rays with a wavelength of 200 nm or less react with oxygen in the air to generate ozone that is harmful to the human body, while ultraviolet rays with a wavelength of 253.7 nm, which has a strong bactericidal power that is called a sterilizing line, emits ozone. It is known not to generate. If the above-mentioned ultraviolet light transmitting portion 8 made of quartz glass is arranged above the passage forming portion 5, the ultraviolet rays having a wavelength of 200 nm or less that generate ozone are cut off, and the ultraviolet rays having a wavelength of 253.7 nm are transmitted. It is possible to irradiate the air passage 4 of the passage forming portion 5.

In general, the bactericidal effect of air by ultraviolet rays can be expressed by the illuminance of ultraviolet rays (W / m ² ) × irradiation time (sec). Therefore, in order to obtain a predetermined bactericidal effect, if the illuminance of ultraviolet rays is small, the irradiation time may be lengthened, and conversely, if the illuminance of ultraviolet rays is large, the irradiation time may be shortened. Therefore, as the germicidal lamp 7, various germicidal lamps are included, including not only specific mercury lamps that emit only ultraviolet rays having a wavelength of 253.7 nm, but also excimer lamps, ultraviolet LEDs, and other lamps that will be developed in the future. Will also be possible. Further, since the germicidal lamp 7 and the air passage 4 are completely separated except for the point of transmitting ultraviolet rays, maintenance such as replacement of the germicidal lamp 7 becomes easy.

FIG. 6 is an electric circuit diagram of the sterilizer 1. Hereinafter, the configuration and operation thereof will be briefly described.

As shown in FIG. 6, the germicidal lamp 7 uses an AC power source. This AC power supply is converted to obtain a DC power supply. The intake fan 9 uses this DC power supply. Further, it is confirmed that the airtightness in the accommodating portion 6 is ensured by correctly mounting the accommodating portion 6 above the passage forming portion 5 via the ultraviolet transmitting portion 8, for example, the passage forming portion 5 and the accommodating portion 6. The limit switches SW1 and SW2 provided at the connection portion 66 of the front walls 52 and 62 and the connection portion 67 of the rear walls 53 and 63 are used for detection.

When the power switch is turned on with the sterilizer 1 assembled, the alternating current from the AC power supply is supplied to the DC power supply via the fuse, where it is converted into a direct current and supplied to the intake fan 9. As a result, the intake fan 9 starts operating. Then, the outside air is sucked from the intake port 2 as shown by the arrow A in FIG. 2, and after passing between the partition plates 56 and 57 in the passage forming portion 5 in a meandering manner as shown by the arrow B in the figure. , As shown by the arrow C in the figure, the air is discharged as it is from the exhaust port 3.

Further, it is detected that the airtightness in the accommodating portion 6 is secured by turning on both the limit switches SW1 and SW2, and in that case, the AC current from the AC power supply is 50 Hz / 50 Hz / It is supplied to the germicidal lamp 7 via a 60 Hz changeover switch and a ballast. Then, the glow tube G connected in parallel to the germicidal lamp 7 works, and the germicidal lamp 7 is turned on. Then, ultraviolet rays are radiated from the germicidal lamp 7, and together with the ultraviolet rays reflected by the passage forming portions 5 and the partition plates 56 and 57, the air passing through the passage forming portions 5 is irradiated. The air efficiently sterilized by the irradiation of the ultraviolet rays is sequentially discharged from the exhaust port 3.

When the power switch is turned off, the alternating current from the AC power supply is cut, the germicidal lamp 7 is turned off, the direct current from the DC power supply is also cut, and the intake fan 9 is also stopped. When the life of the germicidal lamp 7 or the like has expired, the germicidal lamp 1 is disassembled, the germicidal lamp 7 or the like is replaced, and then reassembled in the reverse procedure of FIG.

As described above, according to the present sterilizer 1, the passage forming portion 5 forming the air passage 4 communicating the intake port 2 and the exhaust port 3 and the accommodating portion 6 outside the passage forming portion 5 are provided. The germicidal lamp 7 that radiates ultraviolet rays is provided, and the passage forming portion 5 has an ultraviolet transmitting portion 8 that transmits ultraviolet rays, and the ultraviolet rays from the germicidal lamp 7 pass through the ultraviolet transmitting portion 8 and are an air passage. Since the air flowing through the 4 is irradiated, the germicidal lamp 7 and the air passage 4 are completely separated except for the point of transmitting ultraviolet rays.

Therefore, even if ozone is generated in the vicinity of the germicidal lamp 7, there is no possibility that this ozone is discharged into the air passage 4. Therefore, the ozone discharged from the sterilizer 1 diffuses into the room where the sterilizer 1 is installed, and does not adversely affect the human body or the like.

Further, the temperature and the flow velocity of the air flowing in the air passage 4 away from the germicidal lamp 7 do not change significantly, and the ultraviolet rays emitted from the germicidal lamp 7 through the ultraviolet transmitting portion 8 enter the air passage 4. A nearly uniform bactericidal effect can be obtained in the flowing air.

Further, according to the present sterilizer 1, since the accommodating portion 6 for airtightly accommodating the germicidal lamp 7 is provided, even if ozone is generated in the vicinity of the germicidal lamp, the ozone is confined in the accommodating portion. It can surely prevent it from spreading indoors.

Further, since the reflective surface for reflecting the ultraviolet rays from the germicidal lamp 7 toward the air passage 4 is provided, the ultraviolet rays from the germicidal lamp 7 can be efficiently irradiated to the air flowing in the air passage 4, and the air is efficient. Can be sterilized well.

Further, since the inner surface of the passage forming portion 5 reflects ultraviolet rays, the ultraviolet rays from the germicidal lamp 7 can efficiently irradiate the air flowing in the air passage 4, and the air can be sterilized efficiently.

Further, since the air passage 4 is meandering, the passage forming portion can be miniaturized. As a result, it is possible to realize a sterilizer that is compact and can efficiently sterilize air.

In the above embodiment, the intake fan 9 is provided only in the intake port 2, but a similar exhaust fan may be provided in the exhaust port 3 instead of or together with the intake fan 9.

Further, in the above embodiment, only one germicidal lamp 7 is provided in the accommodating portion 6 in the front-rear direction, but a plurality of germicidal lamps 7 may be provided in appropriate places in the accommodating portion 6.

Further, in the above embodiment, both the passage forming portion 5 and the accommodating portion 6 are made of metal, but specifically, aluminum made of aluminum which easily reflects ultraviolet rays and easily dissipates heat, stainless steel having weather resistance, and the like. Is preferable. Further, the entire passage forming portion 5 and the accommodating portion 6 do not necessarily have to be made of the same material. For example, the passage forming portion 5 may be made of stainless steel and the inner surface thereof may be covered with a material that easily reflects ultraviolet rays. Further, if it is not a material that is easily deteriorated by irradiation with ultraviolet rays such as a specific synthetic resin, it may be made of a non-metal material. The same applies to the gasket material for airtightly holding the accommodating portion 6.

Further, in the above embodiment, the front walls 52 and 62 of the passage forming portion 5 and the accommodating portion 6 of the sterilizer 1 are arranged sideways with the front walls 52 and 62 on the left side and the rear walls 53 and 63 on the right side. May be placed in. Further, the front walls 52 and 62 of the passage forming portion 5 and the accommodating portion 6 of the sterilizer 1 may be arranged vertically with the front walls 52 and 62 on the lower side and the rear walls 53 and 63 on the upper side, and there is no functional problem. As long as you can choose any arrangement. As for each shape of the passage forming portion 5 and the accommodating portion 6, any shape can be selected as long as there is no functional problem.

Further, in the above embodiment, the sterilizer 1 sterilizes air, but gas other than air may be sterilized, and a fluid other than gas, for example, a liquid such as water may be sterilized.

1 Sterilizer 2 Intake port (corresponds to the intake port)
3 Exhaust port (corresponds to the exhaust port)
4 Air passage (corresponds to a fluid passage)
5 Passage forming part 6 Accommodating part 7 Germicidal lamp (corresponds to the ultraviolet radiation part)
8 Ultraviolet ray transmitting part 9 Intake fan

Japanese Unexamined Patent Publication No. 2016-32620

Claims (5)

A passage forming portion that forms a fluid passage that communicates the suction port and the discharge port,
It is provided with an ultraviolet radiating portion provided outside the passage forming portion and radiating ultraviolet rays.
The passage forming portion has an ultraviolet transmitting portion that transmits ultraviolet rays, and the passage forming portion has an ultraviolet transmitting portion.
A sterilizer in which ultraviolet rays from the ultraviolet radiating portion pass through the ultraviolet transmitting portion and irradiate a fluid flowing in the fluid passage. The sterilizing apparatus according to claim 1, further comprising an accommodating portion for airtightly accommodating the ultraviolet radiating portion. The sterilizing apparatus according to claim 1 or 2, wherein a reflecting surface for reflecting ultraviolet rays from the ultraviolet radiating portion toward the fluid passage is provided. The sterilizer according to any one of claims 1 to 3, wherein the inner surface of the passage forming portion reflects ultraviolet rays. The sterilizer according to any one of claims 1 to 4, wherein the fluid passage is meandering.

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