JP2022053090A - Chamber washing device and method - Google Patents

Abstract

To provide technical means capable of easily sterilizing a chamber space.SOLUTION: A chamber washing device comprises: a sterilization channel 20 in which ultraviolet radiation means 30 is arranged; a fan 60 for taking ambient air into the sterilization channel 20; ozone detoxifying means 53 for detoxifying ozone generated in the sterilization channel 20; a position adjusting device 50 for adjusting a position of the ozone detoxifying means 53; and a control unit 90. The control unit 90 can switch a mode between, a safe sterilization mode for discharging air to which ultraviolet is radiated in the sterilization channel 20, through the ozone detoxifying means 53, and a strong force sterilization mode for discharging the air to which the ultraviolet is radiated in the sterilization channel, without through the ozone detoxifying means 53.SELECTED DRAWING: Figure 1

Description

The present invention relates to an apparatus and a method for cleaning a room with ultraviolet rays and ozone generated by ultraviolet irradiation.

Conventionally, there is known a method of deodorizing and sterilizing air with O3 ₍ ozone) generated by decomposing oxygen by irradiation with ultraviolet rays and combining it with _O2 (oxygen molecules) in the atmosphere. For example, Patent Document 1 discloses an ultraviolet irradiation device that performs cleaning treatment with ultraviolet rays and ozone generated by ultraviolet irradiation by irradiating the air entering the ultraviolet treatment chamber with ultraviolet rays to deodorize and sterilize the air. Has been done.

Japanese Unexamined Patent Publication No. 2018-51106

Recently, due to the spread of new coronavirus infections, there is a demand for means for eradicating indoor spaces. Since the new coronavirus is highly infectious, it is necessary not only to clean the air in the room but also to sterilize the virus adhering to the surface of furniture. It is thought that the same problem may occur when a new type of virus is expressed in the future.

An object of the present invention is to provide a technical means capable of easily sterilizing an indoor space.

The indoor cleaning device according to the present invention has a sterilization flow path in which an ultraviolet irradiation means is provided, a fan that takes in outside air into the sterilization flow path, and ozone harmless that detoxifies ozone generated in the sterilization flow path. It is provided with a detoxifying means, a position adjusting device for adjusting the position of the ozone detoxifying means, and a control device. It is characterized by being able to switch between a safe sterilization mode that discharges through the sterilization flow path and a powerful sterilization mode that discharges air irradiated with ultraviolet rays in the sterilization flow path without going through the ozone detoxification means. do.
In the indoor cleaning device, the ultraviolet irradiation means may be configured to irradiate UV-C waves.
In the indoor cleaning device, the ultraviolet irradiation means may be configured to be a coil-shaped cold cathode fluorescent tube.
In the indoor cleaning device, the sterilization flow path may be a mirror-finished metal cylinder.
In the indoor cleaning device, the ultraviolet irradiation means may be configured to be an LED light emitting device or an excimer lamp.
In the indoor cleaning device, the ozone detoxifying means may be configured to be an activated carbon-containing filter.
In the indoor cleaning device, the control device may be configured to have a timer function for executing the safe sterilization mode or the strong sterilization mode at a preset time zone.
The indoor cleaning device is further provided with an occupancy detection sensor that detects the presence of a person, and when the occupancy detection sensor detects the occupancy of the room, the control device executes the powerful sterilization mode. It can be configured to be impossible.

The indoor cleaning method according to the present invention is an indoor cleaning method using the above-mentioned indoor cleaning device, and when a person is in the room, the air is sterilized by executing the safe sterilization mode, and the person is absent. By executing the strong sterilization mode at the time of the room, the air and the surface of the furniture in the room are sterilized.
In the indoor cleaning method, in the strong sterilization mode, the new coronavirus (COVID-19) can be sterilized by ejecting 1 ppm or more of ozone into the room.

According to the present invention, it is possible to provide a technical means capable of easily sterilizing an indoor space.

It is a block diagram of the room cleaning device which concerns on 1st Embodiment. It is a block diagram which shows the filter switching part which concerns on this embodiment. It is a block diagram of the room cleaning device which concerns on 2nd Embodiment. It is a figure which shows the filter switching part which concerns on other embodiment.

FIG. 1 is a configuration diagram of an indoor cleaning device 1 according to the present embodiment. As shown in FIG. 1, the indoor cleaning device 1 according to the present embodiment includes an air suction port 10, a sterilization flow path 20, an ultraviolet irradiation unit 30, a dust filter 40, a filter switching unit 50, and a fan 60. It has a motor 70, an air discharge port 80, and a control device 90. The indoor cleaning device 1 according to the present embodiment is installed in an indoor room, a ventilation port, or the like, sucks indoor air or outdoor air, detoxifies foreign substances contained in the air sucked inside the device, and cleans the air indoors. It is a device that discharges to. The substances detoxified by the indoor cleaning device 1 according to the present embodiment are viruses and bacteria scattered in the air, carcinogens contained in cigarette smoke, allergens contained in dust and the like, PM2.5 and the like. It contains foreign substances such as pollutants. In addition, in FIG. 1, the direction in which air flows in the indoor cleaning device 1 is indicated by an arrow (the same applies to FIG. 3 described later).

A dust filter 40 is installed in the air suction port 10, and the air sucked from the air suction port 10 passes through the dust filter 40 and flows into the inside of the indoor cleaning device 1. The dust filter 40 is not particularly limited, and a commercially available dust filter can be used to shield relatively large-sized dust and dirt so that they do not flow into the indoor cleaning device 1. The air suction port 10 communicates with the sterilization flow path 20, and the air sucked from the air suction port 10 flows into the sterilization flow path 20.

The sterilization flow path 20 is a tubular member made of metal, and the material is not particularly limited, but the sterilization flow path 20 can be made of, for example, iron or aluminum. Further, in the present embodiment, the inner surface of the sterilization flow path 20 is mirror-finished. By mirror-finishing the inner surface of the sterilization flow path 20, the reflectance of ultraviolet rays in the sterilization flow path 20 can be increased, the amount of ultraviolet rays in the sterilization flow path 20 can be increased, and mold can be obtained. This is because it is possible to prevent bacteria, viruses, and the like from entering the unevenness of the inner surface of the sterilization flow path 20, and to enhance the bactericidal effect.

The indoor cleaning device 1 according to the present embodiment has an ultraviolet irradiation unit 30 in the sterilization flow path 20. The ultraviolet irradiation unit 30 irradiates the air flowing in the sterilization flow path 20 with ultraviolet rays to detoxify foreign substances contained in the air and purify the air. The ultraviolet irradiation unit 30 is not particularly limited, but it is preferable that the ultraviolet irradiation unit 30 can irradiate UV-C having the highest bactericidal effect among the ultraviolet light. The wavelength of UV-C is 100 to 280 nm, and it is easily absorbed by the DNA of molds, bacteria and viruses contained in the air, so it can be expected to have the effect of destroying and killing the DNA and genes of these molds, bacteria and viruses. Because. In the present embodiment, a cold cathode fluorescent tube that irradiates UV-C of 258 nm is used as the ultraviolet irradiation unit 30. The cold-cathode fluorescent tube is smaller in size and has a longer life than the hot-cathode fluorescent tube. Further, the cost of the cold cathode fluorescent tube is as low as 1/5 as compared with the ultraviolet LED light source, and the cost of the indoor cleaning device 1 can be reduced. Furthermore, the cold-cathode fluorescent tube does not have the directivity of ultraviolet light like an ultraviolet LED light source, and can irradiate ultraviolet light in all directions, so that it is possible to more efficiently detoxify foreign substances in the air. Become.

Further, in the present embodiment, as shown in FIG. 1, a spiral cold cathode fluorescent tube is used as the ultraviolet irradiation unit 30. For example, it is formed by spirally deforming a cold cathode fluorescent tube with a diameter of 5 mm and a length of 1 m, which makes it possible to irradiate ultraviolet light over a wider area with high output, and to make foreign substances more efficient. It is possible to make it harmless. For example, when a spiral cold cathode fluorescent tube is used on the same plane, the irradiation amount of general ultraviolet rays is 1.2 mW / m ₂ , whereas the spiral cold cathode according to the present embodiment is used. When a fluorescent tube is used, the general irradiation amount of ultraviolet rays is 2.0 mW / m ₂ , and the amount of ultraviolet rays in the sterilization flow path 20 is 2 due to the synergistic effect with the mirror surface processing of the inner surface of the sterilization flow path 20. It is expected that the amount will be up to 3 times. In this embodiment, the ultraviolet irradiation voltage conversion unit (not shown) for supplying the electric power supplied from the commercial power source to the ultraviolet irradiation unit 30 is provided, and the electric power supplied from the ultraviolet irradiation power source is provided. The ultraviolet irradiation unit 30 irradiates the ultraviolet light based on the above.

Further, in the present embodiment, the ultraviolet irradiation unit 30 can adjust the amount of ultraviolet rays to be irradiated by periodically repeating on / off of ultraviolet irradiation by the control device 90 and controlling the off time. The concentration of ozone generated in the sterilization flow path 20 can be adjusted. In particular, depending on the type of the ultraviolet irradiation unit 30, the life may be shortened by repeating on / off, but when a cold cathode fluorescent tube is used, the life is extended by repeating on / off. You can also do it.

In the present embodiment, as shown in FIG. 1, a fan 60 is interposed between the sterilization flow path 20 and the air discharge port 80. The fan 60 is rotationally driven by the motor 70 to suck air from the air suction port 10 and discharge the detoxified air in the disinfection flow path 20 to the outside from the air discharge port 80. The motor 70 can change the air volume (rotational speed) of the fan 60 stepwise (for example, in three steps) according to the instruction of the control device 90.

Further, in the present embodiment, as shown in FIG. 1, a filter switching unit 50 is installed between the fan 60 and the sterilization flow path 20. Here, FIG. 2 is a front view of the filter switching unit 50 according to the present embodiment. As shown in FIG. 2, the filter switching unit 50 according to the present embodiment has a first vent 51 provided with an ozone adsorption filter 53 and a second vent 52 not provided with a filter. Further, as the ozone adsorption filter 53 provided in the first vent 51, a commercially available activated carbon-containing filter (activated carbon-containing non-woven fabric) having an effect of temporarily adsorbing ozone can be used.

The filter switching unit 50 is driven in the Z-axis direction by a motor (not shown) based on the control of the control device 90. As a result, the filter switching unit 50 can be switched so that the air flowing from the sterilization flow path 20 to the air discharge port 80 flows through the first vent 51 or the second vent 52. For example, when the second vent 52 is located on the flow path, the sterilized air in the sterilization flow path 20 is discharged to the outside from the air discharge port 80 as it is. On the other hand, when the filter switching unit 50 is switched so that the first vent 51 is located on the flow path, the sterilized air in the sterilization flow path 20 passes through the ozone adsorption filter 53 of the first vent 51. , Is discharged to the outside from the air discharge port 80.

Here, when ultraviolet light is irradiated by the ultraviolet irradiation unit 30 in the sterilization flow path 20, ozone ₍ O3) may be generated in the air. In particular, in the present embodiment, the ultraviolet irradiation unit 30 emits UV-C having a short wavelength at which ozone is easily generated, so that ozone is easily generated. Ozone is known to have a bactericidal action and a deodorizing action due to its strong oxidizing power, but it is also known that when the concentration is high, it has an adverse effect on the human body such as irritation to the skin. However, in the indoor cleaning device 1 according to the present embodiment, the air is generated by irradiation with ultraviolet light by switching the filter switching unit 50 so that the air passes through the first vent 51 and the ozone adsorption filter 53. Ozone can be adsorbed by the ozone adsorption filter 53 to detoxify the air discharged from the air discharge port 80. In the following, the mode of switching the filter switching unit 50 so that the air passes through the first vent 51 and the ozone adsorption filter 53 is referred to as a "safe sterilization mode", and the air is referred to as the second vent. The mode in which the filter switching unit 50 is switched so as to pass through 52 is referred to as a "strong sterilization mode".

As described above, since the indoor cleaning device 1 according to the present embodiment can switch between the "safe sterilization mode" and the "strong sterilization mode", the method of using the indoor cleaning device 1 is as follows. is assumed. That is, when a person is present in the room, the filter switching unit 50 is switched to the "safe sterilization mode", and the air irradiated with ultraviolet light in the sterilization flow path 20 is passed through the ozone adsorption filter 53. The ozone generated in the sterilization flow path 20 is adsorbed by the ozone adsorption filter 53, and the ozone in the air discharged from the air discharge port 80 is reduced. As a result, even when a person is present in the room, the work can be performed indoors with peace of mind.

On the other hand, when no one is present in the room, the filter switching unit 50 is switched to the "strong sterilization mode", and the air irradiated with ultraviolet light in the sterilization flow path 20 is exhausted without passing through the filter. By discharging from the outlet 80, ozone generated in the sterilization flow path 20 can be discharged from the air discharge port 80. As described above, ozone has a strong bactericidal action and deodorizing action, so it has a function of providing purified air indoors by discharging ozone generated in the sterilization flow path 20 as it is from the air discharge port 80. In addition, it is possible to sterilize molds, bacteria, and viruses that float in the indoor space by the emitted ozone or adhere to furniture, walls, floors, and the like.

The indoor cleaning device 1 is provided with a switch for switching the filter switching unit 50, and when the user operates this switch, the control device 90 drives the filter switching unit 50 in the Z-axis direction. It is possible to switch between "safe sterilization mode" and "strong sterilization mode". Further, the indoor cleaning device 1 has a receiver for receiving a switching signal between the "safe sterilization mode" and the "strong sterilization mode", and when the user transmits the signal to the receiver, the receiver receives the signal. The control device 90 may be configured to switch between the "safe sterilization mode" and the "strong sterilization mode" based on the signal. Further, the indoor cleaning device 1 is provided with a timer, and the control device 90 executes the "safe sterilization mode" in advance in a time zone (for example, daytime) in which the execution of the "safe sterilization mode" is set, and "powerful" in advance. It is also possible to execute the "safe sterilization mode" in the time zone (for example, at night) in which the execution of the "sterilization mode" is set. Also, in this case, if the timer is linked with a notification system such as a chime or email to switch to the "safe sterilization mode", or if a certain time before the "strong sterilization mode" is implemented, the chime or email, etc. It may be configured to give a notification.

Further, the indoor cleaning device 1 has an occupancy detection sensor installed in the room from the viewpoint of safety, and the control device 90 receives a signal from the occupancy detection sensor that a person is in the room. If this is the case, the "strong sterilization mode" cannot be executed and the "safe sterilization mode" can be executed.

As described above, the indoor cleaning device 1 according to the first embodiment has a sterilization flow path 20 in which the ultraviolet irradiation unit 30 is arranged, a fan 60 that takes in outside air into the sterilization flow path 20, and a sterilization flow path. The ozone adsorption filter 53 for detoxifying the ozone generated in the 20 is provided, the filter switching unit 50 for adjusting the position of the ozone adsorption filter 53, and the control device 90 are provided, and the control device 90 is a sterilization flow path 20. A safe sterilization mode in which the air irradiated with ultraviolet rays is discharged through the ozone adsorption filter 53, and the air irradiated with ultraviolet rays in the sterilization flow path 20 is discharged without passing through the ozone adsorption filter 53. It has a powerful sterilization mode. This makes it possible to properly clean the room. That is, in the safe sterilization mode, in addition to being able to sterilize the sucked air in the sterilization flow path 20 and release the clean air into the room, it was generated in the sterilization flow path 20 by the ozone adsorption filter 53. Since ozone is adsorbed, even when a person is present in the room, it is possible to suppress the release of ozone into the room and prevent the ozone from affecting the human body. Further, in the strong sterilization mode, in addition to being able to sterilize the sucked air in the sterilization flow path 20 and release the clean air into the room, the ozone generated in the sterilization flow path 20 can be discharged into the room as it is. By releasing it, the furniture in the room can be strongly sterilized by ozone. In particular, ozone has a higher specific gravity than air, and ozone ejected upward by the indoor cleaning device 1 floats in the indoor space and then descends and adheres to furniture such as a table. This makes it possible to effectively sterilize molds, bacteria, and viruses adhering to furniture.

Further, the indoor cleaning device 1 according to the present embodiment can generate ozone of 1 ppm or more, more specifically 5 ppm or more. Here, it has been confirmed that ozone has a decontamination effect on the new coronavirus (COVID-19) even at a concentration of 0.05 ppm or 0.1 ppm (Fujita Medical University, pre-released on August 26, 2020,). https://www.fujita-hu.ac.jp/news/j93sdv0000007394.html). Therefore, since the indoor cleaning device 1 according to the present embodiment can generate ozone of 1 ppm or more or 5 ppm or more, it is presumed that it is also effective for sterilizing the new coronavirus. In addition, it has been found that the new coronavirus has the property of easily adhering to furniture, etc., and by ejecting ozone into the room and adhering ozone to the furniture by the weight of ozone, the new coronavirus can be more efficiently attached. It is expected that the bacteria can be eradicated. Further, the indoor cleaning device 1 according to the present embodiment is effective not only for the new coronavirus but also for other viruses such as influenza virus and bacteria, and the symptom becomes severe due to infection with a plurality of viruses. Can also be expected to have the effect of suppressing.

<< Second Embodiment >>
Next, the indoor cleaning device 1a according to the second embodiment will be described. FIG. 3 is a block diagram of the indoor cleaning device 1a according to the second embodiment. As shown in FIG. 3, the indoor cleaning device 1a according to the second embodiment is characterized by having a flow path shielding plate 100 in addition to the configuration of the indoor cleaning device 1 according to the first embodiment.

The flow path shielding plate 100 can be made of a material of the same quality as the sterilization flow path 20 (for example, a metal such as iron or aluminum), and is preferably mirror-finished in the same manner as the sterilization flow path 20. The flow path shielding plate 100 shields a part of the sterilization flow path 20 to lengthen the air flow path in the sterilization flow path 20, and the time for the air to be irradiated with ultraviolet light by the ultraviolet irradiation unit 30. Can be lengthened.

As described above, the indoor cleaning device 1a according to the second embodiment can lengthen the flow path in the sterilization flow path 20 by having the flow path shielding plate 100, and the air is emitted by the ultraviolet irradiation unit 30. The time of irradiation with ultraviolet light can be lengthened. As a result, a higher bactericidal effect can be obtained against molds, bacteria and viruses in the air. Further, the flow path shielding plate 100 can be driven in the Z-axis direction based on the control of the control device 90. For example, the control device 90 enhances the sterilization effect of molds, bacteria, and viruses in the air by advancing into the sterilization flow path 20 only in the "strong sterilization mode", and increases the amount of ozone generated. You can do more.

Although the preferred embodiment of the present invention has been described above, the technical scope of the present invention is not limited to the description of the above embodiment. Various changes and improvements can be added to the above-described embodiments, and those in which such changes or improvements have been made are also included in the technical scope of the present invention.

For example, in the above-described embodiment, a configuration in which a spiral cold cathode fluorescent tube is used as the ultraviolet irradiation unit 30 is exemplified, but the configuration is not limited to this configuration, and for example, an LED light emitting device or an excimer lamp that emits ultraviolet light is used. It can also be configured to be used.

Further, as shown in FIG. 2, the filter switching unit 50 according to the above-described embodiment has a first vent 51 provided with an ozone adsorption filter 53 and a second vent 52 not provided with a filter. It is a configuration, and a configuration for switching between a "strong sterilization mode" and a "safe sterilization mode" by driving the entire filter switching unit 50 in the vertical direction is illustrated, but the configuration is not limited to this configuration, and for example, the figure. As shown in 4, the filter switching unit 50a has an ozone adsorption filter 53 and a first vent 51, and only the ozone adsorption filter 53 can be driven up and down. In this case, the "safe sterilization mode" can be executed by locating the ozone adsorption filter 53 so as to overlap with the first vent 51, and the ozone adsorption filter 53 is driven downward to drive the ozone adsorption filter 53 downward to the first vent 51. By setting the position so that it does not overlap with, the "strong sterilization mode" can be executed. 4A is a front view of the filter switching unit 50a according to another embodiment, and FIG. 4B is a side view of the filter switching unit 50a according to another embodiment.

1 ... Indoor cleaning device 10 ... Air suction port 20 ... Bactericidal flow path 30 ... Ultraviolet irradiation part 40 ... Dust filter 50 ... Filter switching part 51 ... 1st ventilation port 52 ... 2nd ventilation port 53 ... Ozone adsorption filter 60 ... Fan 70 ... Motor 80 ... Air outlet 90 ... Control device 100 ... Flow path shielding plate

The indoor cleaning device according to the present invention has a sterilization flow path in which an ultraviolet irradiation means is provided, a fan that takes in outside air into the sterilization flow path, and ozone harmless that detoxifies ozone generated in the sterilization flow path. It is provided with a detoxifying means, a position adjusting device for adjusting the position of the ozone detoxifying means, and a control device. It is possible to switch between a safe sterilization mode in which the air is discharged via the sterilization flow path and a strong sterilization mode in which the air irradiated with ultraviolet rays in the sterilization flow path is discharged without the ozone detoxification means. The irradiation means is a coiled cold cathode fluorescent tube, and the sterilization flow path is composed of a mirror-processed tubular member .
In the indoor cleaning device, the ultraviolet irradiation means may be configured to irradiate UV-C waves.
In the indoor cleaning device, a shielding plate that shields a part of the sterilization flow path may be arranged in the sterilization flow path .
In the indoor cleaning device, the ozone detoxifying means may be configured to be an activated carbon-containing filter.
In the indoor cleaning device, the control device may be configured to have a timer function for executing the safe sterilization mode or the strong sterilization mode at a preset time zone.
The indoor cleaning device is further provided with an occupancy detection sensor that detects the presence of a person, and when the occupancy detection sensor detects the occupancy of the room, the control device executes the powerful sterilization mode. It can be configured to be impossible.

Claims (10)

A sterilization flow path in which ultraviolet irradiation means are arranged, and
With a fan that takes in outside air into the sterilization flow path,
Ozone detoxification means for detoxifying ozone generated in the sterilization flow path,
A position adjustment device that adjusts the position of ozone detoxification means,
Equipped with a control device,
A safe sterilization mode in which the control device discharges air irradiated with ultraviolet rays in the sterilization flow path via the ozone detoxification means.
An indoor cleaning device characterized in that it can switch between a powerful sterilization mode in which air irradiated with ultraviolet rays in the sterilization flow path is discharged without going through the ozone detoxification means. The indoor cleaning device according to claim 1, wherein the ultraviolet irradiation means irradiates a UV-C wave. The indoor cleaning device according to claim 1 or 2, wherein the ultraviolet irradiation means is a coiled cold cathode fluorescent tube. The indoor cleaning device according to claim 3, wherein the sterilization flow path is a mirror-finished metal cylinder. The indoor cleaning device according to claim 1 or 2, wherein the ultraviolet irradiation means is an LED light emitting device or an excimer lamp. The indoor cleaning device according to any one of claims 2 to 5, wherein the ozone detoxifying means is an activated carbon-containing filter. The indoor cleaning device according to any one of claims 2 to 6, wherein the control device has a timer function for executing the safe sterilization mode or the strong sterilization mode in a preset time zone. .. In addition, it is equipped with an occupancy detection sensor that detects the presence of a person.
The indoor cleaning device according to any one of claims 2 to 7, wherein when the control device detects the presence of a room, the strong sterilization mode cannot be executed. An indoor cleaning method using the indoor cleaning device according to any one of claims 1 to 8.
When a person is in the room, the air is sterilized by executing the safe sterilization mode.
An indoor cleaning method comprising performing sterilization of air and the surface of furniture in a room by executing the strong sterilization mode when a person is absent. The indoor cleaning method according to claim 9, wherein in the strong sterilization mode, the new coronavirus (COVID-19) can be sterilized by ejecting 1 ppm or more of ozone into the room.

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