JP6878663B1 - Room cleaning device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technical means capable of easily sterilizing an indoor space. SOLUTION: A sterilization flow path 20 in which an ultraviolet irradiation means 30 is arranged, a fan 60 that takes in outside air into the sterilization flow path 20, and ozone harmless that detoxifies ozone generated in the sterilization flow path 20. The sterilization means 53, the position adjusting device 50 for adjusting the position of the ozone detoxification means 53, and the control device 90 are provided, and the control device 90 blows the air irradiated with ultraviolet rays in the sterilization flow path 20 into ozone. It is possible to switch between a safe sterilization mode in which the air is discharged via the detoxification means 53 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 53. An indoor cleaning device characterized by being present. [Selection diagram] Fig. 1

Description

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

Conventionally, the oxygen to decompose upon irradiation with ultraviolet rays, a method of performing an air deodorizing and disinfecting are known by O ₃ produced by binding and O _{2 (oxygen} molecules) in the air _(ozone). For example, Patent Document 1 discloses an ultraviolet irradiation device that performs cleaning treatment with ultraviolet rays and ozone generated by the 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, means for sterilizing indoor spaces are required. Since the new coronavirus is highly infectious, it is necessary not only to clean the indoor air 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 arranged, a fan that takes in outside air into the sterilization flow path, and ozone harmless that detoxifies ozone generated in the sterilization flow path. The sterilization means, the position adjusting device for adjusting the position of the ozone detoxification means, and the control device are provided, and the control device uses the air irradiated with ultraviolet rays in the sterilization flow path to the ozone detoxification means. and safety disinfection mode for discharging through the irradiated with ultraviolet light disinfection flow path air, and strong sterilization mode to discharge without passing through the ozone detoxification unit, Ri switchable der, said ultraviolet The irradiation means is a coiled cold cathode fluorescent tube, and the sterilization flow path is composed of a mirror-finished 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 further includes an occupancy detection sensor that detects that a person is in the room, and when the control device detects that the occupancy detection sensor is in the room, the powerful sterilization mode is executed. It can be configured to be impossible.

The indoor cleaning method according to the present invention is an indoor cleaning method using the 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. When in the room, the strong sterilization mode is executed to sterilize the air and the surface of the furniture in the room.
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 apparatus 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 apparatus 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 indoors, in 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 interior 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 dust and dirt from flowing 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 it 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-processing 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 and viruses from entering the unevenness of the inner surface of the sterilization flow path 20 and 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 at 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 rays in all directions, so that it is possible to more efficiently detoxify foreign substances in the air. Become.

Further, in the present embodiment, as the ultraviolet irradiation unit 30, as shown in FIG. 1, a spiral cold cathode fluorescent tube is used. 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 in a wider range with high output, and to make foreign matter more efficient. It becomes possible to detoxify. 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 ~ 3 times. In this embodiment, there is an ultraviolet irradiation voltage conversion unit (not shown) for supplying the electric power supplied from the commercial power source to the ultraviolet irradiation unit 30, and the electric power supplied from the ultraviolet irradiation power source. 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 the on / off of the 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 sterilization 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 positioned 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. , It is discharged to the outside from the air discharge port 80.

Here, in Jokinryuro 20, the ultraviolet light by the ultraviolet irradiation unit 30 is irradiated, there is a case where ozone (O ₃₎ is 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 likely to be generated, so that ozone is easily generated. Ozone is known to have a bactericidal action and a deodorant 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 passes through 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 person 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, since ozone has a strong bactericidal action and deodorizing action, 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, the emitted ozone can sterilize molds, bacteria, and viruses that float in the indoor space or adhere to furniture, walls, and floors.

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 the "safe sterilization mode" and the "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, when the timer is linked with a notification system such as a chime or email to switch to the "safe sterilization mode", or a certain time before the "strong sterilization mode" is implemented, the chime or email, etc. It may be configured to perform 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. In that 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 includes 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. A sterilization flow path 20 includes an ozone adsorption filter 53 that detoxifies ozone generated in 20 and a filter switching unit 50 that adjusts the position of the ozone adsorption filter 53 and a control device 90. 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 strong sterilization mode. As a result, the room can be properly cleaned. 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, the ozone adsorption filter 53 generated the air in the sterilization flow path 20. 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 is directly discharged into the room. By releasing it, the furniture in the room can be strongly sterilized by ozone. In particular, ozone has a higher specific density than air, and ozone ejected upward by the indoor cleaning device 1 floats in the indoor space, 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 attached more efficiently. 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 the virus.

<< Second Embodiment >>
Next, the indoor cleaning device 1a according to the second embodiment will be described. FIG. 3 is a configuration 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 like the sterilization flow path 20. The flow path shielding plate 100 lengthens the air flow path in the sterilization flow path 20 by shielding a part of 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 has the flow path shielding plate 100, so that the flow path in the sterilization flow path 20 can be lengthened, 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 and increases the amount of ozone generated by advancing into the sterilization flow path 20 only in the "strong sterilization mode". 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 / improvements can be made to the above-described embodiment, and those in which such changes / 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 has been 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. Although the configuration is such that the entire filter switching unit 50 is driven in the vertical direction to switch between the "strong sterilization mode" and the "safe sterilization mode", 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 the first vent 51, and the ozone adsorption filter 53 is driven downward to drive the first vent 51. By setting the position so that it does not overlap with, the "strong sterilization mode" can be executed. Note that FIG. 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 vent 52 ... 2nd vent 53 ... Ozone adsorption filter 60 ... Fan 70 ... Motor 80 ... Air outlet 90 ... Control device 100 ... Flow path shielding plate

Claims (8)

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.
The irradiated with ultraviolet light disinfection flow path air, and strong sterilization mode to discharge without passing through the ozone detoxification unit, Ri switchable der and
The ultraviolet irradiation means is a coiled cold cathode fluorescent tube.
An indoor cleaning device characterized in that the sterilization flow path is composed of a mirror-finished tubular member. 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 a shielding plate that shields a part of the sterilization flow path is arranged in the sterilization flow path. The indoor cleaning device according to any one of claims 1 to 3 , wherein the ozone detoxifying means is an activated carbon-containing filter. The indoor cleaning device according to any one of claims 1 to 4 , 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 1 to 5 , 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 6.
When a person is in the room, the air is sterilized by executing the safe sterilization mode.
An indoor cleaning method characterized in that when a person is absent, the air and the surface of furniture in the room are sterilized by executing the strong sterilization mode. The indoor cleaning method according to claim 7 , 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.

Images