Mobile ultraviolet disinfection device

Abstract

To provide a mobile ultraviolet sterilization device which is safe and easily used.SOLUTION: A power source unit and an ultraviolet ray emission unit are provided as separate units, and connected by a movable wiring. The power source unit supplies power to the ultraviolet ray emission unit. The ultraviolet ray emission unit comes close to an object to be sterilized, and emits an ultraviolet ray. The ultraviolet ray emission unit includes an ultraviolet ray restriction member that limits the diffusion range of the emitted ultraviolet ray, and a relay device that supplies power from the power source unit to an ultraviolet lamp only when an irradiation switch is turned on in a state where a moving object is not sensed within a prescribed distance in a horizontal direction and the object to be sterilized is detected within a prescribed distance downward.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mobile ultraviolet sterilization device, and more particularly to a mobile ultraviolet sterilization device having a power supply unit that supplies a predetermined amount of power, and an ultraviolet radiating unit that is connected to the power supply unit, moves to a position close to an object to be sterilized, and radiates ultraviolet rays to the object to be sterilized. [Background technology]

[0002] Public facilities are used by many people, and people infected with bacteria or viruses among those people can transmit the bacteria or viruses they are carrying to other people by coughing, sneezing, etc., or by touching objects with contaminated hands. In order to prevent the spread of infection through such person-to-person transmission of bacteria or viruses, all facilities are required to disinfect various equipment and items.

[0003] Furthermore, disinfection of substantially fixed equipment and fixtures is generally performed by wiping with alcohol or spraying with disinfectant, but these methods have problems such as being labor-intensive because they must be done manually, and the effectiveness of alcohol and disinfectants varies depending on the type of bacteria or virus. For this reason, there is a demand for a portable sterilization device that is effective against all bacteria and viruses and can be easily moved and used at any location.

[0004] Another sterilization method besides wiping with alcohol or spraying disinfectants is to sterilize with ultraviolet light. Ultraviolet light is absorbed by the nucleic acid of bacteria and viruses, destroying the nucleic acid and killing the bacteria and viruses.

[0005] Ultraviolet rays generally refer to light rays in the wavelength range of approximately 100 to 400 nm, and are classified into three types: "short-wavelength ultraviolet rays (UV-C)" from 100 to 280 nm, "medium-wavelength ultraviolet rays (UV-B)" from 280 to 315 nm, and "long-wavelength ultraviolet rays (UV-A)" from 315 to 400 nm. Ultraviolet rays with wavelengths of 250 to 280 nm, which are easily absorbed by nucleic acids, have a strong bactericidal effect, and ultraviolet rays with a wavelength of 253.7 nm in particular are known as germicidal rays. However, ultraviolet rays with wavelengths other than these also have a bactericidal effect.

[0006] The advantages of ultraviolet sterilization include: 1) it is effective against all bacteria and viruses and does not create resistant bacteria or viruses; 2) it causes almost no change to the target object to be sterilized; 3) it is easy to manage and suitable for automatic operation; 4) the processing time is short; and 5) it is clean and leaves no residue.

[0007] On the other hand, the disadvantages of UV sterilization include: 1) UV irradiation can be damaging to the eyes, especially when it is applied to humans, 2) the devices are generally large and consume a lot of power, 3) it is ineffective if there is something blocking the light, and sterilization is limited to surfaces and other areas where UV can reach, 4) the effect is weakened if the target to be sterilized is not irradiated closely, and 5) the bactericidal and virucidal effects do not last. In particular, the damage to the eyes when applied to humans, the weakening of the effect if the target is not irradiated closely, and the general large size of the devices are major problems in the development of UV sterilization devices.

[0008] A conventional mobile ultraviolet sterilization device is a robot vacuum cleaner that sterilizes a floor by moving circularly around the floor while irradiating ultraviolet rays downward (see, for example, Patent Document 1). However, this type of robot vacuum cleaner only moves circularly around the floor and cannot be moved and used in places other than the floor.

[0009] There is also an indoor sterilization device that is equipped with a wall-mountable housing, a light source that is housed inside the housing and irradiates ultraviolet light, and an aperture member that is provided in front of the light source and narrows the irradiation range of the irradiated ultraviolet light, and is installed in a place higher than human height so as not to injure people's eyes (see, for example, Patent Document 2). However, the sterilization device described in Patent Document 2 has the problem that it can only sterilize spaces and equipment that are higher than human height, and cannot be moved to any location to disinfect a wide variety of equipment and fixtures. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-46592 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-23305 Summary of the Invention [Problem to be solved by the invention]

[0011] To provide a safe mobile ultraviolet sterilization device which radiates ultraviolet rays to an object to be sterilized by bringing an ultraviolet radiating part close to the object to be sterilized and which is installed so that the ultraviolet rays do not enter the human eyes and cause damage to the eyes. [Means for solving the problem]

[0012] The mobile ultraviolet sterilization device of the present invention is a mobile ultraviolet sterilization device in which a power supply unit and an ultraviolet radiation unit are provided separately and electrically connected by movable wiring, and the ultraviolet radiation unit is movably arranged, the power supply unit transforms power input from an external power source into power of a standard used by the ultraviolet radiation unit and outputs it to the ultraviolet radiation unit via the movable wiring and a relay device, the ultraviolet radiation unit has a housing, one or more ultraviolet lamps, and an ultraviolet diaphragm member, the housing has a moving device provided on any surface except the bottom and an opening provided horizontally on the bottom surface, the one or more ultraviolet lamps are arranged parallel to the opening at the top inside of the housing, equidistant from the opening and equally spaced from each other, and are connected to the relay device to receive a supply of power and irradiate ultraviolet rays onto the object to be sterilized below, the ultraviolet diaphragm member is provided horizontally between the ultraviolet lamp and the opening, and a plurality of light paths having the same cross-sectional shape and length are provided between the surface on the ultraviolet lamp side and the surface on the opening side, and the diffusion of ultraviolet light irradiated from the ultraviolet lamp through the opening onto the object to be sterilized is adjusted to be within a predetermined angle range from vertically below the opening.

[0013] Furthermore, it is preferable that the ultraviolet diaphragm member be configured so that the angle of the ultraviolet rays irradiated from the opening onto the object to be sterilized is within the range of 25° to 35° with respect to the vertically downward direction of the opening. The ultraviolet diaphragm member may have a cross section of the optical path in the shape of a lattice made up of a plurality of squares.

[0014] The ultraviolet diaphragm member is characterized in that the cross section of the optical path is in the shape of a ladder formed by arranging a plurality of squares in a row. The ultraviolet diaphragm member may have a cross section of the optical path that has a honeycomb shape made up of a plurality of regular hexagons.

[0015] The ultraviolet radiation unit is characterized in that the outer shape of the housing is a substantially rectangular parallelepiped, and the moving device is provided on the top surface or side surface of the housing. The ultraviolet emitting unit may be formed so that the housing can be held by a moving device.

[0016] The relay device is further characterized by comprising a human presence sensor that determines that there is no moving object when no moving object is detected within a specified horizontal sector-shaped area whose angular range is within a specified angle to the left and right from the front and whose distance is within a specified distance (L cm) when the ultraviolet emitting unit is facing forward from the operator, an irradiated object sensor that detects objects to be sterilized within a specified distance (D cm) below the opening, and an irradiation switch that turns the ultraviolet lamp on and off.

[0017] It is preferable that the relay device has a human presence sensor, an irradiated object sensor, and an irradiation switch connected in series, and supplies power from the power supply unit to the ultraviolet lamp only when the human presence sensor determines that there is no moving object within a predetermined horizontal area, the irradiated object sensor detects an object to be sterilized within a predetermined distance (D cm) below, and the irradiation switch is turned on.

[0018] In addition, the relay device is in a state where the angular range of the predetermined horizontal area is a range of 90° in both directions from the front, the predetermined distance (L cm) is 500 cm, the human presence sensor does not detect a moving object within the predetermined horizontal area, and it is determined that there is no moving object (human), The specified distance below (Dcm) is 30cm, and the irradiation object sensor detects the object to be sterilized within 30cm below the opening, Furthermore, the power supply unit supplies power to the ultraviolet lamp only when the irradiation switch is turned on.

[0019] The ultraviolet radiation unit is characterized in that the output of the ultraviolet lamp is 3 to 50 watts (W), the predetermined distance (D cm) below the opening and the object to be sterilized is 30 cm, the angular range of the predetermined horizontal area is 90 degrees left and right from the front, the predetermined horizontal distance (L cm) between the ultraviolet radiation unit and the moving object is 500 cm, and power is supplied to the ultraviolet lamp from the power supply unit only when the radiation switch is turned on.

[0020] The ultraviolet ray emitting section may further include reflecting plates provided above and to the sides of the ultraviolet lamp to reflect the ultraviolet rays emitted from the ultraviolet lamp. It is also preferable that either or both of the ultraviolet diaphragm member and the reflector are made of aluminum.

[0021] The ultraviolet lamp is any one of a low-pressure mercury lamp, a plasma lamp, a xenon lamp, an excimer lamp, and an LED lamp. [Effects of the Invention]

[0022] The mobile ultraviolet sterilization device of the present invention has a large power supply unit and a relatively small mobile ultraviolet radiation unit, each of which is provided as separate devices, and the power supply unit and the ultraviolet radiation unit are electrically connected via movable wiring and a relay device. Electricity is supplied from the large power supply unit to the mobile ultraviolet radiation unit, and the ultraviolet radiation unit is brought close to the object to be sterilized, emitting ultraviolet rays to provide a mobile ultraviolet sterilization device that has sterilizing and virucidal effects.

[0023] Furthermore, the mobile ultraviolet sterilization device of the present invention radiates ultraviolet light by placing a mobile ultraviolet emitting unit close to the object to be sterilized, thereby exerting a sterilizing and virucidal effect on bacteria and viruses attached to the surface of the object to be sterilized. The ultraviolet sterilization device has the excellent characteristics of not producing resistant bacteria or viruses, being easy to manage, having a short processing time, causing almost no change to the target object, and leaving no disinfectant residue.

[0024] Furthermore, an ultraviolet diaphragm member is provided between the ultraviolet lamp and the opening of the housing of the ultraviolet radiation unit, which confines the ultraviolet light emitted from the ultraviolet lamp to a predetermined range below, preventing the ultraviolet light from scattering and entering the human eyes and causing damage.

[0025] Furthermore, the ultraviolet radiation unit of the present invention connects the human presence sensor, irradiated object sensor, and irradiation switch of the relay device in series, and irradiates ultraviolet light only when the human presence sensor determines that no moving object (human) is detected within a predetermined horizontal area, the irradiated object sensor detects an object to be sterilized within a predetermined distance below, and the irradiation switch is turned on.This prevents ultraviolet light from being accidentally directed at people and prevents damage to their eyes, making it even safer.

[0026] The mobile ultraviolet sterilization device of the present invention has an excellent sterilization effect, capable of 100% sterilization of E. coli inoculated in a petri dish 30 cm away by irradiating it for 60 seconds. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a block diagram showing the configuration of a mobile ultraviolet sterilization device of the present invention. FIG. [Figure 2] 1 is a schematic cross-sectional view of a mobile ultraviolet radiation unit according to an embodiment of the present invention; [Figure 3] FIG. 2 is a bottom view of an ultraviolet emitting unit according to an embodiment of the present invention. [Figure 4] 10 is a diagram showing a modified example of an ultraviolet diaphragm member having a honeycomb shape according to the present invention. FIG. [Figure 5] 1A is a bottom view of an ultraviolet emitting unit according to another embodiment of the present invention, and FIG. 1B is a cross-sectional view thereof. [Figure 6] FIG. 2 is a block diagram of the electrical pathways of the mobile ultraviolet sterilization device of the present invention. [Figure 7] 4 is an operation diagram of the relay device of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0028] The mobile ultraviolet sterilization device of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of a mobile ultraviolet sterilization device of the present invention. 1, in the mobile ultraviolet sterilization device 1 of the present invention, the power supply unit 40 and the ultraviolet radiation unit 3 are provided separately and are electrically connected via movable wiring 44 and a relay device 30, thereby enabling the ultraviolet radiation unit 3 to be movably deployed. The power supply unit 40 has a power switch and a transformer (not shown), and can transform power input from an external power source 50, for example, a commercial power source, into power of a standard used by the ultraviolet radiation unit 3 and output it to the ultraviolet radiation unit 3.

[0029] FIG. 2 is a schematic cross-sectional view of an ultraviolet emitting unit according to one embodiment of the present invention. As shown in FIG. 2, the ultraviolet ray emitting unit 3 according to one embodiment of the present invention includes a housing 10, a relay device 30, one or more ultraviolet ray lamps 5, and an ultraviolet ray diaphragm member 16.

[0030] The housing 10 may have an opening 12 provided horizontally on its bottom surface, and a moving device 20 provided on any of the outer surfaces except the bottom surface. The moving device 20 is not particularly limited as long as it is a device that can move the ultraviolet radiation unit 3, and may be, for example, a gripping device. The moving device 20 may also be a robot that can operate the ultraviolet radiation unit 3 from a position separated from the ultraviolet radiation unit 3, or can operate the ultraviolet radiation unit 3 according to a set program.

[0031] One or more ultraviolet lamps 5 are arranged inside the housing 10 above the opening 12, parallel to the opening 12, equidistant from the opening 12 and equidistant from each other, and are connected to a relay device 30 connected to a power supply unit 40 to transmit power, allowing them to radiate ultraviolet light downward. The ultraviolet diaphragm member 16 is provided horizontally between the ultraviolet lamp 5 and the opening 12, and is formed in a shape in which optical paths 15 of the same length are arranged without gaps parallel to the irradiation direction of the ultraviolet lamp 5, and is translucent in the direction from the ultraviolet lamp 5 to the opening 12, and it is preferable that its lower surface coincides with the opening 12.

[0032] The ultraviolet diaphragm member 16 is a member that diaphragms the direction of ultraviolet light emitted from the ultraviolet lamp 5 to within a range of a predetermined angle (α°) with respect to the vertically downward direction of the ultraviolet lamp 5. The predetermined angle (α°) is preferably in the range of 25° to 35° with respect to the vertically downward direction of the ultraviolet lamp 5. If the predetermined angle (α°) is 35° or more, the ultraviolet light may be scattered horizontally and enter the human eye, potentially causing eye damage. If the predetermined angle (α°) is 25° or less, the cross-sectional area of ​​the optical path 15 becomes relatively small compared to the area of ​​the opening 12, which is undesirable.

[0033] FIG. 3 is a bottom view of the ultraviolet radiating unit 3 according to one embodiment of the present invention. As shown in Figures 2 and 3, the ultraviolet radiation unit 3 of one embodiment of the present invention can have a housing 10 formed in an approximately rectangular parallelepiped shape and having an opening 12 on the bottom surface, one or more ultraviolet lamps 5 that radiate ultraviolet rays downward, and reflectors 14 that are provided on the inner periphery above and to the sides of the ultraviolet lamps 5 inside the housing and reflect the ultraviolet rays radiated from the ultraviolet lamps 5.

[0034] As shown in FIG. 3, the ultraviolet aperture member 16 according to one embodiment of the present invention is a lattice-like porous flat plate in which multiple rectangular tubes of the same length are arranged without gaps parallel to the irradiation direction of the ultraviolet lamp 5, and has a lattice-like surface 18, and it is preferable that the lower lattice-like surface 18 coincides with the opening 12 of the housing 10.

[0035] The material of the ultraviolet diaphragm member 16 is not particularly limited, but since it is portable, it is preferably lightweight, and since the ultraviolet lamp 5 generates heat, it is desirable that the material be heat-resistant. Aluminum is a preferred material. Furthermore, heat-resistant synthetic polymer resins are preferred materials for the housing 10 and the moving device 20.

[0036] The reflector 14 preferably has high ultraviolet reflectivity, heat resistance, and is lightweight. Aluminum is a preferred material. Alternatively, a heat-resistant synthetic polymer resin laminated with aluminum can also be used.

[0037] FIG. 4 is a diagram showing a modified example of an ultraviolet diaphragm member having a honeycomb shape according to the present invention. As shown in Figure 4, an ultraviolet diaphragm member 16 according to a modified example of the present invention is a flat plate having a honeycomb-shaped surface 19 in which a plurality of hexagonal tubes of the same length are arranged without gaps, and one honeycomb-shaped surface 19 of the ultraviolet diaphragm member 16 can be provided so as to coincide with the opening 12. The honeycomb-shaped ultraviolet diaphragm member 16 has stronger mechanical strength in the horizontal direction than a lattice-shaped ultraviolet diaphragm member, and is characterized by less and more uniform diffusion of ultraviolet light that passes through the ultraviolet diaphragm member, and by excellent design.

[0038] FIG. 5A is a bottom view of an ultraviolet emitting unit 103 according to another embodiment of the present invention, and FIG. 5B is a cross-sectional view thereof. As shown in FIG. 5, the ultraviolet diaphragm member 16 of the ultraviolet radiation unit 103 according to another embodiment of the present invention has a ladder-like cross section formed by arranging a number of regular squares in a row, and the housing 110 is formed to be grippable, so that it also serves as a moving device.

[0039] FIG. 6 is a block diagram of the electrical path of the mobile ultraviolet sterilization device of the present invention, and FIG. 7 is an operation diagram of the relay device of the present invention. As shown in Figure 6, the mobile ultraviolet sterilization device 1 of the present invention can convert power supplied from an external power source 50 into power of a standard used by the ultraviolet radiation unit 3 using the power supply unit 40, and supply it to the ultraviolet lamp 5 of the ultraviolet radiation unit 3 via movable wiring 44 and relay device 30.

[0040] As shown in FIG. 7, the relay device 30 of the present invention is equipped with a human presence sensor 34 that determines that there is no moving object (human) 62 within a predetermined horizontal area, an irradiation object sensor 32 that detects an object to be sterilized 60 within a predetermined distance (D cm) below the opening 12, and an irradiation switch 42 that turns the ultraviolet lamp 5 on and off by operation by the operator.

[0041] The ultraviolet radiator 3 of the present invention is mobile, and therefore can radiate ultraviolet rays horizontally as well. However, it is extremely dangerous for the ultraviolet radiator 3 to radiate ultraviolet rays directly onto a moving object (human) 62 in the immediate vicinity, so a predetermined horizontal area is provided and a human presence sensor 34 is provided on the ultraviolet radiator 3 to detect whether or not a moving object (human) 62 is present within the predetermined horizontal area.

[0042] Although it depends on the output of the ultraviolet lamp 5, it is preferable that the predetermined horizontal distance (Lcm) of the predetermined horizontal area is, for example, 500 cm. Even if a person is directly exposed to ultraviolet rays, if the predetermined horizontal distance (Lcm) is 500 cm or more, the person's eyes are less likely to be damaged if the lamp is quickly turned off / moved away. However, if the predetermined horizontal distance (Lcm) is 500 cm or less, direct exposure to ultraviolet rays may cause eye damage even with short exposure, which is not preferable.

[0043] Furthermore, although it depends on the measurement location, measurement conditions, etc., the angular range of the predetermined horizontal region can be a range of 90° left and right from the front. A moving object (person) 62 in a region where the predetermined left and right angle from the ultraviolet emitting unit 3 exceeds ±90° is often close to the measurer and can be easily recognized by the measurer. The human presence sensor 34 can determine that a moving object (human) 62 is not present, for example, when it does not detect a moving object (human) 62 in a predetermined horizontal area whose angular range is 90° in both directions from the front and front, and whose predetermined horizontal distance (L cm) is 500 cm or less.

[0044] The predetermined distance (D cm) below the irradiated object sensor 32 is preferably 30 cm, for example. If the predetermined distance below is 30 cm or more, the distance from the ultraviolet lamp 5 becomes too great, and the ultraviolet light may become weaker, making it impossible to achieve sufficient sterilization and virucidal effects, although this depends on the output of the ultraviolet lamp 5. Furthermore, the smaller the predetermined distance below, the more powerful the sterilization and virucidal effects can be achieved. However, from the viewpoint of workability and because it is undesirable for the ultraviolet radiating unit 3 to come into contact with the object 60 to be sterilized, it is preferable to operate the ultraviolet radiating unit 3 at least 3 cm away from the object 60 to be sterilized.

[0045] The relay device 30 of the present invention has a human presence sensor 34, an irradiated object sensor 32, and an irradiation switch 42 connected in series, and supplies power from the power supply unit to the ultraviolet lamp only when the human presence sensor 34 determines that there is no moving object (human) 62 within a predetermined horizontal area, the irradiated object sensor 32 detects an object to be sterilized 60 within a predetermined distance (D cm) below the ultraviolet radiator 3, and the operator turns on the irradiation switch 42. There are no particular restrictions on the order in which the human presence sensor 34, irradiated object sensor 32, and irradiation switch 42 are connected, but it is preferable that the human presence sensor 34 and the irradiated object sensor 32 are connected in this order, and the irradiation switch 42 can be connected below them.

[0046] In one embodiment of the ultraviolet radiation unit 3 of the present invention, power can be supplied from the power supply unit to the ultraviolet lamp only when the human presence sensor 34 determines that no moving object (human) 62 is present within a predetermined horizontal region whose angular range is 90° in both directions from the front and front, and whose predetermined horizontal distance from the ultraviolet radiation unit 3 is 500 cm, the irradiation object sensor 32 detects an object to be sterilized 60 within a predetermined distance of 30 cm below the opening 12 of the ultraviolet radiation unit 3, and the irradiation switch 42 is turned on.

[0047] In one embodiment of the present invention, the output of the ultraviolet lamp is preferably 3 to 50 watts (W). If the output of the ultraviolet lamp is 3 W or less, the emitted ultraviolet light may be too weak to exhibit sufficient bactericidal and virucidal effects. While an ultraviolet lamp with an output of 50 W can exhibit sufficient bactericidal and virucidal effects, using an ultraviolet lamp with an output of 50 W or more is not economically preferable, and furthermore, emitting ultraviolet light that is more powerful than necessary is undesirable because it can cause serious damage to the eyes if the ultraviolet light leaks out.

[0048] The ultraviolet lamp 5 of the present invention may be any one selected from a low-pressure mercury lamp, a plasma emission lamp, a xenon lamp, an excimer lamp, or an LED lamp.

[0049] An embodiment using the mobile ultraviolet sterilization device 1 shown in FIGS. 1 to 3 will be described below. [Example] A mobile ultraviolet sterilization device 1 according to one embodiment of the present invention includes a power supply unit 40 that supplies power to an ultraviolet radiating unit 3, and the ultraviolet radiating unit 3 that is connected to the power supply unit 40 and radiates ultraviolet light.

[0050] (Power supply part) The power supply unit 40 is installed, for example, on the floor, so as to be movable, and is connected to an external power supply 50, which is a commercial power source, to receive commercial power.The received power is transformed into power of the standard used by the ultraviolet radiation unit 3, and supplied to the ultraviolet lamps 5 of the ultraviolet radiation unit 3 via movable wiring 44 and a relay device 30.

[0051] (ultraviolet radiation part) The ultraviolet radiation unit 3 of this example had five 6W low-pressure mercury lamps installed at equal intervals parallel to the opening 12 on the upper inside of the housing 10. In addition, an aluminum lattice-shaped ultraviolet diaphragm member 16 was provided on the lower inside of the housing 10, with a flat surface measuring 300 mm x 300 mm and a distance of 52 mm from the surface facing the ultraviolet lamps to the surface facing the opening. The ultraviolet diaphragm member 16 had an internal dimension of 30 mm per square, and limited the irradiation direction of ultraviolet rays to within 30° of the downward vertical direction.

[0052] The ultraviolet radiation unit 3 has a human presence sensor 34 that detects a moving object (human) 62 in a predetermined horizontal area, an irradiation object sensor 32 that is set so that power can be supplied to the ultraviolet lamp 5 when an object to be sterilized 60 is detected within a predetermined distance of 30 cm below the opening 12 of the housing 10, and an irradiation switch 42 connected in series in this order, and power is supplied from the power supply unit 40 to the ultraviolet lamp 5 only when the human presence sensor 34 determines that there is no moving object (human) 62, the irradiation object sensor 32 detects an object to be sterilized 60 within 30 cm, and the power switch 42 is turned on by the operator.

[0053] (Bactericidal effect) A petri dish containing an agar medium inoculated with E. coli was placed 30 cm below the opening 12 of the housing 10 of the ultraviolet radiation unit 3, and ultraviolet light was irradiated from the ultraviolet lamp 5 for a predetermined time. The ultraviolet irradiation time and the number of surviving E. coli bacteria (colonies / cm 2 ) were measured, and the sterilization rate was calculated. The results are shown in Table 1. As shown in Table 1, the mobile ultraviolet sterilization device 1 of this example was able to sterilize 100% of the E. coli bacteria by irradiating it for 60 seconds at a distance of 30 cm from the petri dish.

[0054] [Table 1]

[0055] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and includes all modifications within the scope of the technology to which the present invention pertains. [Explanation of symbols]

[0056] 1 Mobile UV sterilizer 3, 103, 203 UV radiation section 5. UV lamp 10, 110, 210 enclosure 12 Opening 14 Reflector 15 Light path 16 UV diaphragm component 17 Predetermined angle 18 Lattice-shaped surface 19 Honeycomb-shaped surface 20, 120, 220 Mobile Device 30 Relay Device 32 Irradiation sensor 34 Human Sensor 40 Power supply section 42 Irradiation switch 44 Movable wiring 50 External power supply 60 Items to be sterilized 62 Moving objects, people

Claims

1. A mobile ultraviolet sterilization device in which a power supply unit and an ultraviolet ray emitting unit are provided separately and electrically connected by movable wiring, and the ultraviolet ray emitting unit is movably arranged, the power supply unit transforms power input from an external power supply into power that complies with the standard used by the ultraviolet ray emitting unit, and outputs the power to the ultraviolet ray emitting unit via the movable wiring and the relay device; the ultraviolet radiation unit has a housing, one or more ultraviolet lamps, and an ultraviolet diaphragm member; the housing has a moving device provided on any surface except the bottom surface, and an opening provided horizontally on the bottom surface, The one or more ultraviolet lamps are arranged parallel to the opening at the top inside the housing, equidistant from the opening, and equidistant from each other, and are connected to the relay device to receive the power supply and irradiate ultraviolet light onto the object to be sterilized below, The ultraviolet diaphragm member is provided horizontally between the ultraviolet lamp and the opening, and a plurality of optical paths having the same cross-sectional shape and length are provided between the surface on the ultraviolet lamp side and the surface on the opening side, and the diffusion of ultraviolet light irradiated from the ultraviolet lamp to the object to be sterilized via the opening is adjusted so that it is within a predetermined angle range from vertically below the opening, The relay device a human presence sensor that determines that no moving object is present when a moving object is not detected within a sector-shaped predetermined horizontal region whose angular range is within a predetermined angle in both directions from the front front and whose distance is within a predetermined distance (L cm) when the direction of the ultraviolet ray emitting unit from the operator is forward; An irradiation object sensor that detects the object to be sterilized within a predetermined distance (D cm) below the opening; an irradiation switch for turning the ultraviolet lamp on and off; Equipped with The relay device is a mobile ultraviolet sterilization device characterized in that the human presence sensor, the irradiated object sensor, and the irradiation switch are connected in series, and the relay device supplies power from the power supply unit to the ultraviolet lamp only when the human presence sensor determines that there is no moving object in an area within a predetermined angle in both directions from the front, the irradiated object sensor detects the object to be sterilized within the predetermined distance (D cm) below, and the irradiation switch is turned on.

2. The mobile ultraviolet sterilization device according to claim 1, characterized in that the ultraviolet diaphragm member is configured so that the angle range of the ultraviolet light irradiated from the opening onto the object to be sterilized is within the range of 25° to 35° relative to the vertically downward direction of the opening.

3. 3. The mobile ultraviolet sterilization device according to claim 1, wherein the ultraviolet diaphragm member has a cross section of the optical path in the form of a lattice made up of a plurality of squares.

4. 3. The mobile ultraviolet sterilization device according to claim 1, wherein the ultraviolet diaphragm member has a cross section of the optical path that is ladder-shaped and formed by arranging a plurality of squares in a row.

5. 3. The mobile ultraviolet sterilization device according to claim 1, wherein the ultraviolet diaphragm member has a cross section of the optical path that has a honeycomb shape made up of a plurality of regular hexagons.

6. The mobile ultraviolet sterilization device according to any one of claims 3 to 5, wherein the outer shape of the housing of the ultraviolet radiating unit is approximately rectangular, and the moving device is provided on the top surface or side surface of the exterior of the housing.

7. 6. The mobile ultraviolet sterilization device according to claim 1, wherein the housing of the ultraviolet radiating unit is formed so as to be grippable by the moving device.

8. The relay device the angular range of the predetermined horizontal area is a range of 90° in both directions from the front, the predetermined distance (L cm) is 500 cm, the human presence sensor does not detect the moving object within the predetermined horizontal area, and it is determined that the moving object (human) is not present; The predetermined downward distance (D cm) is 30 cm, and the irradiated object sensor detects the object to be sterilized within 30 cm below the opening, 2. The mobile ultraviolet sterilizer according to claim 1, wherein the power supply unit supplies the power to the ultraviolet lamp only when the irradiation switch is turned on.

9. 9. The mobile ultraviolet sterilization device according to claim 1 or 8, wherein the ultraviolet radiating unit has an output of the ultraviolet lamp of 3 to 50 watts (W), a predetermined distance (D cm) below the opening and the object to be sterilized is 30 cm, an angular range of the predetermined horizontal area is a range of 90° in both directions from the front to the left and right, and a predetermined horizontal distance (L cm) between the ultraviolet radiating unit and the moving object is 500 cm.

10. 10. The mobile ultraviolet sterilization device according to claim 1, further comprising reflectors provided above and to the sides of the ultraviolet lamps to reflect the ultraviolet light emitted from the ultraviolet lamps.

11. 11. The mobile ultraviolet sterilization device according to claim 1, wherein the ultraviolet radiating unit is made of aluminum.

12. The mobile ultraviolet sterilization device according to claim 10, wherein the reflector is made of aluminum.

13. 13. The mobile ultraviolet sterilization device according to claim 1, wherein the ultraviolet lamp is any one of a low-pressure mercury lamp, a plasma emission lamp, a xenon lamp, an excimer lamp, and an LED lamp.

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