CN113730618B - Ultraviolet irradiation device and air supply system using the same - Google Patents
Ultraviolet irradiation device and air supply system using the same Download PDFInfo
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- CN113730618B CN113730618B CN202110563955.8A CN202110563955A CN113730618B CN 113730618 B CN113730618 B CN 113730618B CN 202110563955 A CN202110563955 A CN 202110563955A CN 113730618 B CN113730618 B CN 113730618B
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- 230000005540 biological transmission Effects 0.000 claims description 6
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- 238000010248 power generation Methods 0.000 claims description 2
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- 230000000415 inactivating effect Effects 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 8
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/24—Apparatus using programmed or automatic operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/11—Apparatus for controlling air treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention provides an ultraviolet irradiation device. Which uses fewer ultraviolet light emitting elements to efficiently irradiate ultraviolet light to the filter as a whole. The ultraviolet irradiation device comprises: a base body having a bearing portion; a rotor disposed so as to face the surface of the filter, the rotor having a plurality of rotary blades rotatable about a rotary shaft supported by the bearing shaft; a plurality of ultraviolet light emitting elements disposed on a surface of at least one of the plurality of rotary blades, the surface being opposite to the surface of the filter; and a power supply unit having a power transmitting portion provided on the side of the base body and a power receiving portion provided on the side of the rotating body, the power transmitting portion being configured to transmit a drive signal for driving the plurality of ultraviolet light emitting elements to the power receiving portion.
Description
Technical Field
The present invention relates to an ultraviolet irradiation device, and more particularly, to an ultraviolet irradiation device for irradiating ultraviolet rays for inactivating various viruses, bacteria, and the like to sterilize, and an air blowing system using the same.
Background
Conventionally, in order to inactivate pathogenic viruses, bacteria, and the like in air, a technique of adsorbing and attaching an aerosol containing viruses, bacteria, and the like to a filter to collect them, and irradiating the filter to which the viruses, bacteria, and the like are attached with ultraviolet rays (in this disclosure, viruses, bacteria, and the like are collectively referred to as "viruses and the like", and inactivated viruses and the like and/or sterilized are collectively referred to as "inactivated viruses and the like") has been used. As products using such a technique of inactivating viruses or the like by irradiation with ultraviolet rays, virus inactivating apparatuses (sterilizing apparatuses), air purifying apparatuses, and the like are known.
For example, patent document 1 below discloses an air cleaner in which a biological filter, an ionization section, an electrostatic filter, and a 1 st photo-semiconductor catalyst filter and a 2 nd photo-semiconductor catalyst filter are disposed in this order on the downstream side of a prefilter, and an ultraviolet lamp for irradiating ultraviolet rays to the 1 st photo-semiconductor catalyst filter and the 2 nd photo-semiconductor catalyst filter is disposed, and air sucked from the room through the prefilter is blown out into the room after passing through the biological filter, the ionization section, the electrostatic filter, and the 1 st photo-semiconductor catalyst filter and the 2 nd photo-semiconductor catalyst filter by a blower.
Further, patent document 2 discloses a virus inactivation technique in which viruses suspended in a gas or viruses in a liquid are collected by a filter and the filter is irradiated with ultraviolet rays. Specifically, patent document 2 discloses a virus inactivation method in which a 1 st electrode to which a voltage is applied and a 2 nd electrode disposed opposite to the 1 st electrode are disposed in a flow path through which virus-containing air flows, a filter is disposed between the 1 st electrode and the 2 nd electrode or at a position downstream in the flow direction of the virus-containing air in the flow path from the two electrodes, and the virus is collected by passing the virus between the two electrodes in a state in which a voltage is applied to the 1 st electrode.
Patent document 3 discloses an air purifying apparatus including: a filter material for an air filter for collecting particles in air; and an ultraviolet lamp disposed upstream of the air filter material in a direction in which the air flow passes through the air filter material, and irradiating an upstream-facing surface of the air filter material with ultraviolet light.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2005-342142
Patent document 2: japanese patent laid-open No. 2015-171440
Patent document 3: japanese patent laid-open No. 2020-043920
Disclosure of Invention
Problems to be solved by the invention
However, as in the conventional technique described above, in order to effectively inactivate viruses and the like adhering to the filter, it is necessary to use an ultraviolet light source capable of radiating ultraviolet rays to the entire filter without fail. Particularly, when an ultraviolet lamp is used, the device tends to be large and heavy, and is not advantageous from the viewpoint of power consumption. In addition, when an ultraviolet light emitting element (ultraviolet LED) is used, a plurality of LEDs need to be arranged in an array to irradiate the entire filter.
In addition, such an ultraviolet irradiation mechanism for inactivating viruses and the like is generally integrally assembled inside the housing of the device. Therefore, the unit cannot be easily transported, and it cannot be easily mounted to other air blowing devices such as an electric fan and a circulator for use.
Accordingly, an object of the present invention is to provide an ultraviolet irradiation device capable of efficiently irradiating ultraviolet rays to the entire filter using fewer ultraviolet light emitting elements.
The present invention also aims to provide an ultraviolet irradiation device that can be transported as a single body and that can be easily attached to and detached from other air blowing devices such as an electric fan and a circulator.
Solution for solving the problem
The present invention for solving the above problems is constituted to include the following specific matters and technical features of the invention.
The present invention, which is formed from some viewpoints, is an ultraviolet irradiation device, comprising: a base body having a bearing portion; a rotor disposed so as to face the surface of the filter, the rotor having a plurality of rotary blades rotatable about a rotary shaft supported by the bearing shaft; a plurality of ultraviolet light emitting elements disposed on a surface of at least one of the plurality of rotary blades, the surface being opposite to the surface of the filter; and a power supply unit having a power transmitting portion provided on the side of the base body and a power receiving portion provided on the side of the rotating body, the power transmitting portion being configured to transmit a drive signal for driving the plurality of ultraviolet light emitting elements to the power receiving portion.
The plurality of ultraviolet light emitting elements may be arranged along the radial direction on the surface of the at least one rotating blade.
The plurality of ultraviolet light emitting elements may be arranged such that a distance between the ultraviolet light emitting elements at a distal end of the at least one rotating blade is smaller than a distance between the ultraviolet light emitting elements at a proximal end of the at least one rotating blade.
The ultraviolet irradiation device may further include a control unit including an LED driver that generates a driving signal for driving the plurality of ultraviolet light emitting elements, respectively, and outputs the driving signal. Further, the control unit may control the ultraviolet light emitting element located at the distal end of the at least one rotating blade so that the driving current per unit time becomes larger.
The rotor may be rotated about an axis by wind force received by the rotor blade. That is, the rotating body is not connected to a power source such as an electric motor.
The power transmitting portion may be provided in the bearing portion, and the power receiving portion may be provided in the hub.
The power supply unit may be a wireless power supply unit configured to include the power transmitting unit and the power receiving unit.
The plurality of rotary blades may include a 1 st rotary blade on which the ultraviolet light emitting element is disposed and a 2 nd rotary blade on which the ultraviolet light emitting element is not disposed.
The base may have a wind tunnel portion connecting an air inlet through which air flows and an air outlet through which the air is discharged. The rotor may be disposed in the wind tunnel portion.
The air outlet may be configured to be detachable from the filter. The air inlet may be configured to be attachable to and detachable from the filter.
The ultraviolet light emitting element may emit ultraviolet light having a wavelength of 220nm or more and 450nm or less. The ultraviolet light emitting element may emit ultraviolet light having a wavelength of 220nm or more and 290nm or less.
The present invention may be an air blowing system including: a blower that supplies the wind power to the rotating blades of the ultraviolet irradiation device; and a controller that controls the operation time and/or the air supply intensity of the air supply device. The controller may be configured to include the control unit.
The controller may control the blower to supply an air flow having a wind speed of 0.5m/s or more and 10m/s or less.
In this specification and the like, the term "component" means not only a physical component but also a component having a function realized by software. The functions of one component may be realized by two or more physical components, and the functions of two or more components may be realized by one physical component. In addition, a "system" refers to a logical collection of devices (or functional modules that perform a specific function), regardless of whether the devices or functional modules are within a single housing.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the ultraviolet irradiation device can efficiently irradiate the entire filter with ultraviolet rays using fewer ultraviolet light emitting elements.
Further, according to the present invention, the ultraviolet irradiation device can be transported as a single body, and can be easily attached to and detached from other air blowing devices such as an electric fan and a circulator.
Other technical features, objects, and operational effects or advantages of the present invention will become apparent from the following embodiments, which are described with reference to the accompanying drawings. The effects described in the present specification are merely illustrative, not restrictive, and other effects may be achieved.
Drawings
Fig. 1A is a side view for explaining an example of an air blowing system according to an embodiment of the present invention.
Fig. 1B is a side view for explaining another example of the air blowing system according to the embodiment of the present invention.
Fig. 2 is a partial side cross-sectional view showing an example of an ultraviolet irradiation device according to an embodiment of the present invention.
Fig. 3 is a view for explaining an example of a rotating body of an ultraviolet irradiation device according to an embodiment of the present invention.
Fig. 4 is a diagram for explaining an example of the track of an ultraviolet light emitting element on a rotating body of an ultraviolet irradiation device according to an embodiment of the present invention.
Fig. 5 is a view illustrating another example of a rotating body in the ultraviolet irradiation device according to the embodiment of the present invention.
Fig. 6 is a block diagram illustrating an example of a circuit configuration of an ultraviolet irradiation device according to an embodiment of the present invention.
Fig. 7 is a timing chart for explaining an example of a driving signal with respect to a duty ratio of an ultraviolet light emitting element in an ultraviolet irradiation device according to an embodiment of the present invention.
Fig. 8 is a partial side sectional view for explaining an example of an air blowing system according to another embodiment of the present invention.
Fig. 9 is a partial side sectional view for explaining an example of an air blowing system according to another embodiment of the present invention.
Fig. 10 is a partial side sectional view for explaining an example of an air blowing system according to another embodiment of the present invention.
Description of the reference numerals
1. An air supply system; 10. an ultraviolet irradiation device; 11. a base; 111. an air inflow port; 112. an air outlet; 113. a wind tunnel section; 114. an arm; 115. a bearing part; 12. a filter; 13. a rotating body; 131. a rotation shaft; 132. a hub; 133. 133', rotating blades; 14. 14a, 14b, 14c, and ultraviolet light emitting elements; 15. a control unit; 151. an LED driver; 16. a power supply unit; 161. a power transmission unit; 162. a power receiving unit; 17. a power supply unit; 20. an air supply device; 30. a controller; 40. and a protective cover.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are merely examples, and there is no intention to exclude various modifications and technical applications not explicitly described below. The present invention can be implemented by various modifications (for example, combining the embodiments) within a range not departing from the gist thereof. In the description of the drawings below, the same or similar reference numerals are given to the same or similar parts. The drawings are schematic and do not necessarily correspond to actual dimensions, proportions, etc. The drawings also include portions having different dimensional relationships and proportions from each other.
[ embodiment 1 ]
Fig. 1A is a side view showing an example of an air blowing system according to an embodiment of the present invention. As shown in the figure, the blower system 1 of the present embodiment may include an ultraviolet irradiation device 10 and a blower device 20. As described in detail below with reference to fig. 2 to 7, the ultraviolet irradiation device 10 irradiates ultraviolet light (for example, UVC) for inactivating viruses and the like contained in the aerosol collected in the filter 12. The blower 20 is a device having a function of generating an air flow at a predetermined wind speed and a predetermined air quantity, and typically has a fan connected to an electric motor that is rotationally driven based on electric power supplied from a power supply not shown. The blower 20 may be a blower fan, a circulator, an air cleaner, or the like. In this example, the ultraviolet irradiation device 10 is configured to be attachable to and detachable from the front surface of the housing of the blower 20 so as to be able to directly receive the air flow generated by the blower 20. The air flow generated by the blower 20 is set to have a wind speed of, for example, 0.5m/s to 10m/s from the viewpoint of inactivation efficiency of noise, viruses, and the like, but is not limited thereto.
The blower system 1 may further include a controller 30 for controlling the ultraviolet irradiation device 10. The controller 30 further includes a power supply unit 17, and the power supply unit 17 supplies power necessary for causing the ultraviolet light emitting element 14 to emit light, which will be described later. The controller 30 may have an operation panel, which is not shown. The operation panel is provided with, for example, a power switch, an operation mode selection switch for defining the light emission intensity of the ultraviolet light emitting element 14, and the like.
As another example, as shown in fig. 1B, the controller 30 may include a power supply for supplying electric power to the blower 20. The controller 30 may be configured to control the blower 20 and the operation time and the blower strength of the blower 20.
Fig. 2 is a partial side cross-sectional view showing an example of an ultraviolet irradiation device according to an embodiment of the present invention. As shown in the figure, the ultraviolet irradiation device 10 includes: a base 11 that substantially defines the external shape of the ultraviolet irradiation device 10; a filter 12 detachably attached to the base 11; a hub 132 that is provided inside the base 11 so as to face the back surface of the filter 12 and is rotatable around a rotation axis (shaft) 131; and a rotating body 13 having a plurality of rotating blades 133. The ultraviolet irradiation device 10 includes a plurality of ultraviolet light emitting elements (ultraviolet LEDs) 14 disposed on the surfaces of the plurality of rotating blades 133 so as to face the surfaces (back surfaces in this example) of the filter 12. The ultraviolet irradiation device 10 further includes: a control unit 15 configured to include an LED driver 151, the LED driver 151 generating a driving signal for driving the plurality of ultraviolet light emitting elements 14 and outputting the driving signal (see fig. 6); and a power supply unit 16 for transmitting the required power from the power supply unit 17 to the control unit 15. The control unit 15 operates in accordance with an operation performed by the operation panel.
The base 11 includes an air inlet 111 into which air flows, an air outlet 112 from which the flowing air is discharged, and a wind tunnel 113 that communicates the air inlet 111 and the air outlet 112. The wind tunnel 113 is designed to have an inner diameter slightly larger than an outer diameter of the plurality of rotary blades 133, and to house the plurality of rotary blades 133 so that the plurality of rotary blades 133 can rotate around the axis.
More specifically, the base 11 has a bearing portion 115 supported by a plurality of arms 114 extending from the outer edge portion toward the center portion of the wind tunnel portion 113, and the bearing portion 115 pivotally supports the rotary shaft of the rotary body 13. Thereby, the rotor 13 having the plurality of rotor blades 133 can rotate around the rotation shaft 131 in the wind tunnel 113. The bearing portion 115 is configured to include, for example, a ball bearing. The bearing portion 115 is provided with a power transmission portion 161 constituting the power supply unit 16.
For example, a reflective film may be applied to the inner wall of the wind tunnel 113 so that the ultraviolet light emitted from the ultraviolet light emitting element 14 is efficiently irradiated to the filter 12, which is not shown. Such a reflective film can prevent ultraviolet rays harmful to the human body from leaking out of the substrate 11.
The filter 12 is an air cleaning filter which has a function of collecting and adhering or adsorbing aerosols containing viruses and the like in the air and is removable and replaceable, and a known filter can be used as the filter 12. The filter 12 may be constituted by a plurality of different kinds or functions of multi-layered air cleaning filters, but is not limited thereto, and may be a single-layered filter. In the present disclosure, the filter 12 is a multi-layer filter including a prefilter, a HEPA filter (High Efficiency Particulate Air Filter), and an activated carbon filter. As another example of the filter 12, there is an electrostatic filter.
In this example, the outer edge of the filter 12 has substantially the same shape as the air outlet 112, and is attached to the base body by being fitted into the air outlet 112. In other examples, filter 12 can be mounted to air inlet 111. In the structure in which the filter 12 is attached to the air inlet 111, the ultraviolet light emitting element 14 is disposed toward the rear side (i.e., toward the upstream of the air flow) so that the emitted ultraviolet light can be irradiated to the front surface of the filter 12. And in other examples, the filter 12 can be mounted to both the air outlet 112 and the air inlet 111. In this case, the filter 12 attached to the air inlet 111 may be a simple filter such as a prefilter. And in other examples, the filter 12 may also be constructed by combining multiple sub-filters in a plane.
The rotating body 13 includes a hub 132 provided with a rotation shaft, and a plurality of rotating blades 133 (see fig. 3) formed to extend in the radial direction from an outer edge portion of the hub 132. The hub 132 and the rotary blade 133 can be integrally formed. A power receiving portion 162 constituting a power supply unit 16 described later is provided around the rotation shaft 131 of the hub 132.
The plurality of rotating blades 133 are configured to receive a flow (wind force) of air flowing in from the air inlet 111 and rotate the rotating body 13. That is, in the present disclosure, the rotating body 13 is not connected to a power source such as a motor, but is rotated by wind power. The flow of air for rotating the rotary body 13 is supplied from the blower 20. The shape, material and number of the rotary blades 133 can be appropriately determined. For example, the rotary blade 133 can be formed of plastic resin, metal, or the like. The number of the rotary blades 133 is, for example, about 3 to 8.
A plurality of ultraviolet light emitting elements 14 are arranged along the radial direction on the surface of one rotary blade 133' of the plurality of rotary blades 133 opposed to the filter 12. In the example shown in fig. 3, 4 rotary blades 133 are provided in the hub 132, and 3 ultraviolet light emitting elements 14a to 14c are provided in one rotary blade 133'. The ultraviolet light emitting element 14 may be disposed so as to be entirely or partially embedded in the rotary blade 133'. In the structure in which the ultraviolet light emitting element 14 is buried in the rotating blade 133', there is no air resistance caused by the ultraviolet light emitting element 14 at the time of rotation, or the air resistance is so small as to be negligible, and therefore, the loss of rotational energy can be eliminated.
Further, since the plurality of ultraviolet light emitting elements 14 are provided in the rotary blade 133', an increase in element temperature due to heat generation associated with light emission can be suppressed by the air cooling action of the rotation of the rotary blade 133'. Thus, it is not necessary to provide a mechanism for cooling the plurality of ultraviolet light emitting elements 14 additionally. In particular, when the rotary blade 133 is made of a material having high thermal conductivity, a further cooling effect with respect to the ultraviolet light emitting element 14 can be expected.
From the viewpoint of inactivation of viruses and the like, the ultraviolet light emitting element 14 is a UVC-LED that emits ultraviolet light having a wavelength of, for example, 220 to 450nm, more preferably 220 to 290nm, and still more preferably about 265 nm. An optical element (e.g., a micro plastic lens) or the like may be disposed on the emission surface of the ultraviolet light emitting element 14 to diffuse the emitted ultraviolet light in a wide range, which is not shown.
The number of ultraviolet light emitting elements 14 and the number of rotary blades 133' provided with the ultraviolet light emitting elements 14 can be variously combined. For example, an arbitrary number of ultraviolet light emitting elements 14 may be arranged on one rotating blade 133'. The rotary blade 133' on which the ultraviolet light emitting element 14 is disposed is not limited to one. As an example, two ultraviolet light emitting elements 14 may be arranged in the 1 st rotary blade 133', and one ultraviolet light emitting element 14 may be arranged in the 2 nd rotary blade 133'. In this case, the plurality of ultraviolet light emitting elements 14 may be arranged substantially point-symmetrically so that the center of gravity of the rotary body 13 is located on or near the rotation axis 131.
In the present disclosure, the 3 ultraviolet light emitting elements 14 are arranged in a row at equal intervals, but the arrangement is not limited thereto. When the plurality of ultraviolet light emitting elements 14 are arranged along the radial direction on the surface of the rotary blade 133', as shown in fig. 4, the ultraviolet light emitting elements 14 located at the distal end of the rotary blade 133' (i.e., the end away from the hub 132) have a relatively high angular velocity, and therefore the irradiation amount of ultraviolet light per unit time in the region of the filter 12 corresponding thereto is relatively small. Accordingly, in some examples, the plurality of ultraviolet light emitting elements 14 are arranged in such a manner that the interval between the ultraviolet light emitting elements 14 at the distal end of the rotating blade 133 is smaller than the interval between the ultraviolet light emitting elements 14 at the proximal end of the rotating blade 133. This ensures that the entire filter 12 is irradiated with ultraviolet light necessary for inactivating viruses and the like. Alternatively or additionally, the output power (current value) may be controlled for each ultraviolet light emitting element 14 so that the irradiation energy per unit area of the ultraviolet light emitting element 14 increases as the ultraviolet light emitting element 14 is located at the far end, or the irradiation time may be controlled for each ultraviolet light emitting element 14 so that the irradiation amount per unit time of the ultraviolet light emitting element 14 located at the far end increases. In this case, the interval between the ultraviolet light emitting elements 14 can be determined in consideration of the effective irradiation amount of ultraviolet light for inactivating viruses or the like.
In order to prevent the ultraviolet light emitted from the ultraviolet light emitting element 14 from leaking to the outside of the substrate 11, a louver (not shown) may be provided in the air outlet 112 (and, if necessary, in the air inlet 111) of the substrate 11. The louver is configured such that, for example, the louver is folded to ensure a flow path of air and to block ultraviolet rays. The louver may be formed of a double layer or more of the vane plates. Alternatively, as shown in other embodiments, a protective cover may be provided to cover the entire ultraviolet radiation device 10 and the blower 20.
Fig. 5 is a view illustrating another example of a rotating body in the ultraviolet irradiation device according to the embodiment of the present invention. Fig. 5 (a) shows a rotary body 13 having 3 rotary blades 133, and 3 ultraviolet light emitting elements 14 are arranged in the radial direction on one rotary blade 133'. In fig. 5 (b), one ultraviolet light emitting element 14 is disposed on each of the 3 rotary blades 133'. In this example, the distances (d 1 < d2 < d 3) between the ultraviolet light emitting elements 14 disposed on the respective rotary blades 133' and the hub 132 are different.
The control unit 15 operates using power from the power supply unit 17 in the controller 30, and controls the LED driver 151 that drives the plurality of ultraviolet light emitting elements 14 (see fig. 5). The control unit 15 can be configured to include, for example, an LED driver 151. The LED driver 151 generates and outputs driving signals for driving the plurality of ultraviolet light emitting elements 14 provided to the rotating blades 133' of the rotating body 13, respectively, under the control of the control unit 15. The drive signal includes, for example, a Pulse Width Modulation (PWM) signal. In the present disclosure, the control unit 15 is provided at a part of the rotating body 13 (e.g., the hub 132, the rotating blades 133).
The power supply unit 16 is a relay unit that transmits electric power from the power supply unit 17 on the side of the base 11 to the ultraviolet light emitting element 14 and the control unit 15 on the rotating body 13. For example, the power supply unit 16 is a wireless (non-contact) power supply unit configured to include a power transmitting portion 161 as a primary side coil unit provided in the bearing portion 115 and a power receiving portion 162 as a secondary side coil unit provided in the hub 132. The power supply unit 16 may be of an electromagnetic coupling type or a magnetic field resonance type, or of an electric field coupling type or an electric field resonance type, and the power supply unit 16 may be configured to supply electric energy wirelessly using electromagnetic waves, laser light, or the like. Alternatively, the power supply unit 16 may be a power supply unit using a sliding electrode instead of the noncontact method.
In the present disclosure, the control unit 15 provided to the rotating body 13 receives supply of electric power from the side of the base 11 via the power supply unit 16, but is not limited thereto. For example, the control unit 15 and the LED driver 151 may be provided at a part of the base 11. In such a configuration, the driving signal output from the LED driver 151 is supplied to the plurality of ultraviolet light emitting elements 14 via the power supply unit 16. Alternatively, the control unit 15 may be provided at a part of the base 11, and the LED driver 151 may be provided at a part of the rotating body 13. In such a configuration, a control signal for controlling the LED driver 151 output by the control unit 15 is transmitted to the LED driver 151 via the power supply unit 16.
Alternatively, the power supply unit 16 may be a power generation unit that generates electric power required for the control unit 15 by the rotation of the rotating body 13. That is, the air flow generated by the blower 20 rotates the plurality of rotary blades 133, and thereby the power supply unit 16 causes the current generated by the induced electromotive force to flow through the secondary side coil provided in the rotary body 13. The power supply unit 16 rectifies the current generated by the induced electromotive force and supplies the rectified current to the control unit 15, whereby the control unit 15 controls the LED driver 151 and outputs a driving signal.
Fig. 6 is a block diagram illustrating an example of a circuit configuration of an ultraviolet irradiation device according to an embodiment of the present invention. As shown in fig. 6, the control unit 15 receives supply of electric power from the power supply unit 17 via the power supply unit 16, and controls the LED driver 151. The LED driver 151 generates a drive signal (PWM signal) for each of the plurality of ultraviolet light emitting elements 14 under the control of the control unit 15 and outputs the drive signal.
In the present disclosure, the control unit 15 adjusts the duty ratio of the driving signal so that the irradiation amount of the ultraviolet light emitting element 14c located at the distal end of the rotary blade 133 'among the plurality of ultraviolet light emitting elements 14 arranged in the radial direction on the surface of the plurality of rotary blades 133 is larger than the irradiation amount of the ultraviolet light emitting element 14 located at the proximal end of the rotary blade 133'. For example, as shown in fig. 7, the control unit 15 controls the LED driver 151 so that the duty ratio of the driving signal for the ultraviolet light emitting element 14c located at the far end is larger than the duty ratio of the driving signal for the ultraviolet light emitting element 14a located at the near end. Accordingly, the amount of irradiation of ultraviolet light per unit time on the outer edge portion of the filter 12 is larger than the amount of irradiation of ultraviolet light per unit time on the central portion of the filter 12, and therefore, the effective amount of irradiation of ultraviolet light required for inactivating viruses or the like can be ensured over the entire filter 12, and efficient irradiation of ultraviolet light on the entire filter 12 can be achieved.
In the blower system 1 configured as described above, the air generated by the blower 20 flows into the air inlet 111 of the ultraviolet irradiation device 10, and the plurality of rotary blades 133 receive the air flow to rotate the rotary body 13. This causes a predetermined electric power to be generated (generated) and supplied to the ultraviolet light emitting element 14, and the ultraviolet light emitting element 14 irradiates the entire filter with the rotation of the rotary blade 133.
As described above, according to the present embodiment, the ultraviolet light emitting element attached to the rotary blade can radiate ultraviolet light to the entire surface of the filter without fail by the rotation of the rotary blade. In particular, according to the present embodiment, since the ultraviolet light emitting elements rotate around the rotation axis 131, the ultraviolet light emitting elements do not need to be arranged in an array over the entire surface of the filter, and the number of components can be reduced, and thus power saving can be achieved. Further, since the rotary blade rotates by receiving the wind power generated by the other air blowing device, a motor is not required, and further weight saving and/or power saving can be achieved.
In addition, according to the present embodiment, the ultraviolet irradiation device can be transported as a single body, and by being attached to a conventional blower, the blower having a virus inactivating function can be easily realized.
[ embodiment 2 ]
Fig. 8 is a partial side sectional view for explaining an example of an air blowing system according to another embodiment of the present invention. As shown in fig. 8, in the blower system 1 of the present example, the ultraviolet irradiation device 10 and the blower device 20 are integrally provided in one base 11. The 1 st rotary body 81 is connected to an electric motor rotationally driven by electric power supplied from a power supply not shown, and generates an air flow of a predetermined wind speed and amount by rotation of the electric motor. The 2 nd rotary body 82 corresponds to the rotary body 13 described above, and includes a plurality of rotary blades 133 provided with a plurality of ultraviolet light emitting elements 14. As described above, the 2 nd rotation body 82 receives the wind power generated by the 1 st rotation body 13 to rotate, and receives the supply of electric power via the power supply unit 16. Accordingly, the entire filter 12 is irradiated with the ultraviolet light emitted from the plurality of ultraviolet light emitting elements 14 along with the rotation of the 2 nd rotary body 82, and therefore the entire filter 12 can be efficiently irradiated with a small number of ultraviolet light emitting elements 14.
As described above, according to the present embodiment, the same advantages and/or effects as those of the above-described embodiment can be achieved. In particular, according to the present embodiment, since the ultraviolet irradiation device 10 and the blower 20 are integrally provided in one base 11, the configuration of a common power supply can be achieved, and the blower system 1 can be miniaturized and reduced in weight.
[ embodiment 3 ]
Fig. 9 is a partial side sectional view for explaining an example of an air blowing system according to another embodiment of the present invention. The entire air blowing system 1 of this example is configured as an air cleaner. That is, the blower 20 is configured as an air cleaner main body, and the ultraviolet irradiation device 10 is configured as an air cleaner filter that can be attached to and detached from the air cleaner main body.
The blower 20 has, for example, a blowout port of purified air formed on an upper surface thereof, and the ultraviolet irradiation device 10 is configured to be suitable for the blowout port of the blower 20. The power transmitting portion 161 is provided at a substantially central portion of the outlet of the blower 20 so that the power transmitting portion 161 approaches the power receiving portion 162 of the ultraviolet irradiation device 10 when the ultraviolet irradiation device 10 is mounted.
As shown in fig. 9, the ultraviolet irradiation device 10 is provided with an upstream filter 12a and a downstream filter 12b at an air inlet 111 and an air outlet 112, respectively, whereby an air purifying filter which is suitable for an air cleaner and can be replaced by being attached and detached can be visually recognized, and a rotary body 13 having an ultraviolet light emitting element 14 is provided inside the air purifying filter.
The power receiving portion 162 is provided in the hub 132 of the rotary body 13 so that the power receiving portion 162 approaches the power transmitting portion 161 of the blower 20 when the rotary body is mounted. Thus, the ultraviolet irradiation device 10 can receive the supply of necessary power and/or signals from the blower 20. The ultraviolet light emitting elements 14 are provided on both surfaces (i.e., the 1 st surface and the 2 nd surface on the opposite side) of the rotary blade 133 so as to be capable of irradiating ultraviolet rays to the upstream filter 12a and the downstream filter 12b provided in the air inlet 111 and the air outlet 112, respectively. As an example, the upstream filter 12a includes a photocatalyst filter, and the ultraviolet light emitting element 14 disposed opposite the upstream filter 12a can be a UVB-LED. In addition, the downstream filter 12b includes a HEPA filter, and the ultraviolet light emitting element 14 provided opposite to the downstream filter 12b can be a UVC-LED. As another example, the upstream filter 12a includes a HEPA filter, and the ultraviolet light emitting element 14 disposed opposite the upstream filter 12a can be a UVC-LED. The downstream filter 12b includes a photocatalyst filter, and the ultraviolet light emitting element 14 provided opposite to the downstream filter 12b can be a UVB-LED. In the case of the latter structure, UVC, which is particularly harmful to the human body, is irradiated toward the inside of the device, and thus, leakage thereof to the outside can be effectively prevented.
In the present disclosure, the blower system 1 is configured such that an air outlet is formed in the upper surface of the blower 20 as the main body of the air cleaner, and the ultraviolet irradiation device 10 is attached to the air outlet, but the present invention is not limited thereto. For example, the air outlet for mounting the ultraviolet irradiation device 10 may be provided on the side surface, the back surface, or the bottom surface.
As described above, according to the present embodiment, the same advantages and/or effects as those of the above-described embodiment can be achieved. In particular, according to the present embodiment, since the ultraviolet irradiation device 10 is configured as a removable and replaceable air purification filter in the air purifier, the air purifier having the ultraviolet irradiation mechanism can be realized by simply changing the power transmission unit 161 of the power supply unit 16 provided in the air purifier main body manufactured so as to be suitable for the conventional air purification filter.
[ embodiment 4 ]
Fig. 10 is a partial side sectional view for explaining an example of an air blowing system according to another embodiment of the present invention. The blower system 1 of the present embodiment is configured to include a protective cover 40 for preventing ultraviolet rays from leaking to the outside. In the example shown in fig. 10 (a), a protective cover 40 having an opening 41 formed in the lower portion is provided to cover the ultraviolet irradiation device 10 and the blower 20. The air after the virus and the like are inactivated by the ultraviolet irradiation device 10 is diffused to the outside from the opening 41 of the protection cover 40.
In the example shown in fig. 10 (b) and 10 (c), the protective cover 40 is preferably configured so that the ultraviolet irradiation device 10 is disposed upward or downward. That is, an opening 41a and an opening 41b are provided in the side portion of the protective cover 40. In addition, the protective cover 40 has, for example, a seal member 42. The sealing member 42 is, for example, suitable for the outer periphery of the housing of the blower 20, and separates the side of the blower 20 where the air intake port (not shown) is located from the side of the ultraviolet irradiation device 10 where the air discharge port 112 is located.
As described above, according to the present embodiment, since the blower system 1 includes the protection cover 40, the ultraviolet light emitted from the ultraviolet light emitting element 14 can be more reliably prevented from leaking to the outside.
[ embodiment 5 ]
The ultraviolet irradiation device 10 may further include a speed sensor for measuring the rotational speed of the rotary body 13. The control unit 15 may control the LED driver 151 so as to adjust the current value and/or the duty ratio of the drive signal to the ultraviolet light emitting element 14 according to the speed of the rotating body detected by the speed sensor. Thus, the amount of ultraviolet light required for inactivating viruses and the like collected in the filter 12 can be adjusted according to the air volume, and the power consumption can be reduced.
The above embodiments are examples for explaining the present invention, but the present invention is not limited to these embodiments. The present invention can be implemented in various forms without departing from the gist thereof.
For example, in the methods disclosed in the present specification, steps, operations, or functions may be performed simultaneously or in a different order as long as the results do not contradict each other. The steps, operations, and functions described above are provided by way of example only, and any of the steps, operations, and functions may be omitted without departing from the scope of the invention, or may be combined with each other to combine them together, or other steps, operations, or functions may be added.
In addition, although various embodiments are disclosed in the present specification, specific features (technical matters) of one embodiment can be appropriately modified, and the present invention is also intended to include embodiments in which the specific features are added to or replaced with those of other embodiments.
For example, the ultraviolet irradiation apparatus of the present disclosure can be applied to an air cleaner, an air conditioner, a ventilator, a ceiling fan, a dust remover, various dryers, and the like. In addition, natural wind may be used as the motive power of the rotating body by placing the ultraviolet irradiation device alone in a well ventilated place, for example.
Claims (23)
1. An ultraviolet irradiation device, wherein,
the ultraviolet irradiation device comprises:
a base body having a bearing portion;
a filter mounted to the base;
a rotor disposed so as to face the surface of the filter, the rotor having a plurality of rotor blades rotatable about a rotation shaft supported by the bearing shaft;
a plurality of ultraviolet light emitting elements disposed on a surface of at least one of the plurality of rotary blades, the surface being opposite to the surface of the filter; and
a power supply unit having a power transmitting portion provided on a side where the base body is located and a power receiving portion provided on a side where the rotating body is located, for transmitting driving signals for driving the plurality of ultraviolet light emitting elements from the power transmitting portion to the power receiving portion,
the plurality of ultraviolet light emitting elements are arranged on the surface of the at least one rotary blade along a radial direction which is an extending direction of the rotary blade,
the plurality of ultraviolet light emitting elements are configured such that a distance between the ultraviolet light emitting elements at a distal end of the at least one rotating blade with respect to the rotation axis is smaller than a distance between the ultraviolet light emitting elements at a proximal end of the at least one rotating blade with respect to the rotation axis.
2. The ultraviolet irradiation apparatus according to claim 1, wherein,
the power supply unit is configured to include a power transmission unit provided in the bearing unit and a wireless power supply unit provided in a power receiving unit of the rotating body.
3. The ultraviolet irradiation apparatus according to claim 1, wherein,
the ultraviolet irradiation device further has a control unit including an LED driver that generates and outputs driving signals for driving the plurality of ultraviolet light emitting elements, respectively,
the power supply unit also serves as a power generation unit that generates electric power required by the control unit by rotation of the rotating body.
4. The ultraviolet irradiation apparatus according to claim 1, wherein,
the plurality of rotary blades includes a 1 st rotary blade provided with the ultraviolet light emitting element and a 2 nd rotary blade not provided with the ultraviolet light emitting element.
5. The ultraviolet irradiation apparatus according to claim 1, wherein,
the plurality of ultraviolet light emitting elements are each configured so as to be wholly or partially embedded in the at least one rotating blade.
6. The ultraviolet irradiation apparatus according to claim 1, wherein,
the ultraviolet light emitting element emits ultraviolet light having a wavelength of 220nm or more and 450nm or less.
7. The ultraviolet irradiation apparatus according to claim 1, wherein,
the ultraviolet light emitting element emits ultraviolet light having a wavelength of 220nm or more and 290nm or less.
8. The ultraviolet irradiation apparatus according to claim 1, wherein,
the rotating body rotates under the action of wind force received by the rotating blades.
9. The ultraviolet irradiation apparatus according to claim 1, wherein,
the base body has a wind tunnel portion connecting an air inflow port into which air flows and an air discharge port from which the air is discharged,
the rotor is disposed in the wind tunnel.
10. The ultraviolet irradiation apparatus according to claim 9, wherein,
the air outlet is configured to be attachable to and detachable from the filter.
11. The ultraviolet irradiation apparatus according to claim 9, wherein,
the air inlet is configured to be attachable to and detachable from the filter.
12. The ultraviolet irradiation apparatus according to any one of claims 9 to 11, wherein,
the inner wall of the wind tunnel is coated with a reflective film.
13. An ultraviolet irradiation device, wherein,
the ultraviolet irradiation device comprises:
a base body having a bearing portion;
a filter mounted to the base;
a rotor disposed so as to face the surface of the filter, the rotor having a plurality of rotor blades rotatable about a rotation shaft supported by the bearing shaft;
a plurality of ultraviolet light emitting elements disposed on a surface of at least one of the plurality of rotary blades, the surface being opposite to the surface of the filter; and
a power supply unit having a power transmitting portion provided on a side where the base body is located and a power receiving portion provided on a side where the rotating body is located, for transmitting driving signals for driving the plurality of ultraviolet light emitting elements from the power transmitting portion to the power receiving portion,
the plurality of ultraviolet light emitting elements are arranged on the surface of the at least one rotary blade along a radial direction which is an extending direction of the rotary blade,
the plurality of ultraviolet light emitting elements are controlled such that the drive current per unit time is greater as the ultraviolet light emitting elements are located at the distal end of the at least one rotating blade with respect to the rotating shaft.
14. The ultraviolet irradiation apparatus according to claim 13, wherein,
the ultraviolet irradiation device further includes a speed sensor that measures a rotation speed of the rotating body, and adjusts a drive current for the ultraviolet light emitting element based on the speed of the rotating body detected by the speed sensor.
15. The ultraviolet irradiation apparatus according to claim 13 or 14, wherein,
the rotating body rotates under the action of wind force received by the rotating blades.
16. An ultraviolet irradiation device, wherein,
the ultraviolet irradiation device comprises:
a base body having a bearing portion;
a filter mounted to the base;
a rotor disposed so as to face the surface of the filter, the rotor having a plurality of rotor blades rotatable about a rotation shaft supported by the bearing shaft; and
a plurality of ultraviolet light emitting elements disposed on a surface of at least one of the plurality of rotary blades opposite to a surface of the filter,
the plurality of ultraviolet light emitting elements are arranged on the surface of the at least one rotary blade along a radial direction which is an extending direction of the rotary blade,
the ultraviolet irradiation device further has a control unit including an LED driver that generates and outputs driving signals for driving the plurality of ultraviolet light emitting elements, respectively,
the control unit controls the LED driver such that a duty ratio of a driving signal for an ultraviolet light emitting element located at a distal end of the at least one rotary blade with respect to the rotary shaft is greater than a duty ratio of a driving signal for an ultraviolet light emitting element located at a proximal end of the at least one rotary blade with respect to the rotary shaft.
17. The ultraviolet irradiation apparatus according to claim 16, wherein,
the ultraviolet irradiation device further includes a speed sensor that measures a rotation speed of the rotating body, and the duty ratio of the ultraviolet light emitting element is adjusted based on the speed of the rotating body detected by the speed sensor.
18. The ultraviolet irradiation apparatus according to claim 16 or 17, wherein,
the rotating body rotates under the action of wind force received by the rotating blades.
19. An air supply system, wherein,
the air supply system comprises: a blower device that supplies wind power to the rotating blades of the ultraviolet irradiation device, and the ultraviolet irradiation device according to claim 1; and a controller that supplies electric power to the air blowing device and controls the operation time and/or the air blowing intensity of the air blowing device.
20. The air supply system of claim 19, wherein,
the controller controls the blower to supply an air flow having a wind speed of 0.5m/s or more and 10m/s or less.
21. The air supply system of claim 19 or 20, wherein,
the ultraviolet irradiation device and the air supply device are integrally arranged in one base body.
22. The air supply system of claim 19 or 20, wherein,
the air supply device is configured as an air cleaner main body, the ultraviolet irradiation device is configured as an air cleaning filter which can be assembled and disassembled relative to the air cleaner main body,
the power transmission unit is provided at a central portion of the outlet of the blower so that the power transmission unit approaches the power reception unit of the ultraviolet irradiation device when the ultraviolet irradiation device is mounted.
23. The air supply system of claim 19 or 20, wherein,
the air supply system is configured to include a protection cover for preventing ultraviolet rays from leaking to the outside, and the protection cover is provided to cover the ultraviolet irradiation device and the air supply device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-094700 | 2020-05-29 | ||
| JP2020094700A JP7153993B2 (en) | 2020-05-29 | 2020-05-29 | Ultraviolet irradiation device and ventilation system using the same |
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| Publication Number | Publication Date |
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| CN113730618A CN113730618A (en) | 2021-12-03 |
| CN113730618B true CN113730618B (en) | 2023-04-21 |
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| CN202110563955.8A Active CN113730618B (en) | 2020-05-29 | 2021-05-24 | Ultraviolet irradiation device and air supply system using the same |
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| JP (1) | JP7153993B2 (en) |
| CN (1) | CN113730618B (en) |
| TW (1) | TWI809403B (en) |
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| JP2023172161A (en) * | 2022-05-23 | 2023-12-06 | 三菱重工サーマルシステムズ株式会社 | Air conditioning device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113730618A (en) | 2021-12-03 |
| TW202206125A (en) | 2022-02-16 |
| JP7153993B2 (en) | 2022-10-17 |
| JP2021186255A (en) | 2021-12-13 |
| TWI809403B (en) | 2023-07-21 |
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