JP6587783B1 - Sterilizer and air conditioner using the same - Google Patents

Abstract

It has a supply port for supplying the air or water taken in and a discharge port for discharging the air or water supplied from the supply port, and is installed between the supply port and the discharge port. Air or water flowing between the flow path body in which the path is formed, the flow path body, the ultraviolet light source, and a reflection part that reflects the ultraviolet light emitted from the ultraviolet light source. An ultraviolet irradiating unit for sterilizing by irradiating with ultraviolet rays, and a channel cross-sectional area reducing unit installed between the ultraviolet irradiating unit and the supply port. An openable / closable shielding body that shields a part and reduces the cross-sectional area of the flow path is provided, and dust or dirt on the reflection part is removed by the flow that has passed through the flow path cross-sectional area reducing part. Thereby, the dust or dirt adhering to the ultraviolet reflecting material can be easily removed.

Description

  The present invention relates to an ultraviolet sterilizer that uses floating microorganisms such as bacteria, molds, and viruses in the air or water to be treated, and an air conditioner using the same.

  Ultraviolet rays (UV) having a wavelength of 200 to 350 nm not only act on nucleic acid which is a protoplasm of bacteria to inhibit DNA replication and take away the ability to grow, but also remove proteins that form cytoplasm or cell membrane. It is known to have an action of destroying and killing bacteria. And the ultraviolet sterilizer which sterilizes by irradiating such an ultraviolet-ray is put into practical use.

  Patent Document 1 and Patent Document 2 describe an air conditioner having an ultraviolet sterilization function. The air conditioners of Patent Literature 1 and Patent Literature 2 include a housing having an air passage through which air passes, and an ultraviolet irradiation unit that irradiates ultraviolet rays into the air passage. An ultraviolet reflector is provided on the wall surface of the air passage, and the sterilization efficiency is enhanced by repeatedly reflecting ultraviolet rays.

JP 2014-100206 A JP 2013-240487 A

  However, when the operating time of the air conditioner elapses, dust or dirt gradually adheres to the ultraviolet reflecting material. When dust or dirt adheres to the ultraviolet reflecting material, the ultraviolet rays are not sufficiently reflected, and there is a problem that the ultraviolet intensity in the apparatus is lowered and the sterilizing effect is lowered. In addition, since dust or dirt has an action of scattering ultraviolet rays, there is a problem that scattered ultraviolet rays leak to the outside from the opening of the flow path and deteriorate members around the opening. In order to remove the dust or dirt, a large-scale maintenance such as disassembling and cleaning the apparatus is required.

  The present invention has been made to solve the above-described problems, and provides a sterilization apparatus capable of easily removing dust or dirt adhering to an ultraviolet reflecting material and an air conditioner using the same. The purpose is to do.

The sterilization apparatus according to the present invention has a supply port for supplying the air or water taken in, and a discharge port for discharging the air or water supplied from the supply port, and the supply port and the discharge port Installed between the channel body in which a channel through which air or water passes is formed, and installed between the supply port and the discharge port, an ultraviolet light source, and an ultraviolet ray emitted from the ultraviolet light source. A reflection part that reflects, an ultraviolet irradiation part that irradiates the air or water flowing through the flow path with ultraviolet rays to perform sterilization treatment, and a flow path breaker disposed between the reflection part and the supply port. An area reducing unit, and the channel cross-sectional area reducing unit includes an openable / closable shield that shields a part of the channel and reduces the cross-sectional area of the channel, and reduces the channel cross-sectional area. Dust or dirt on the reflective part is removed by the flow passing through the part. Than is.

  According to the present invention, dust or dirt adhering to the ultraviolet reflector can be easily removed by reducing the cross-sectional area of the flow path using the flow-path cross-sectional area reducing section to increase the flow velocity of the air flow or water flow. It becomes possible.

It is a schematic block diagram which shows the air conditioner which concerns on Embodiment 1 of this invention. It is the schematic block diagram which looked at the air path cross-sectional area reduction part of the sterilizer with which the air conditioner of FIG. 1 is provided from the air path side. It is a schematic block diagram which shows the state at the time of washing | cleaning operation | movement of the air path cross-sectional area reduction part of FIG. It is a schematic block diagram which shows the state at the time of the sterilization operation | movement of the sterilizer in the air conditioner of FIG. It is a schematic block diagram which shows the state at the time of washing | cleaning operation | movement of the sterilizer with which the air conditioner of FIG. 1 is provided. It is explanatory drawing which shows schematic structure of the ultraviolet irradiation part in the sterilizer with which the air conditioner of FIG. 1 is provided. It is a schematic sectional drawing of the ultraviolet irradiation part along the AA line of FIG. It is explanatory drawing which illustrates the shape of the reflecting plate with which the ultraviolet irradiation part of FIG. 7 is provided. It is explanatory drawing regarding the incident angle and reflection angle of light. FIG. 9 is a schematic diagram illustrating an inclination angle of a reflecting surface with respect to a flat surface when ultraviolet rays are vertically incident on the reflecting plate illustrated in FIG. 8. FIG. 9 is a schematic diagram illustrating an inclination angle of a reflecting surface with respect to a flat surface when ultraviolet rays are vertically reflected from the reflecting plate illustrated in FIG. 8. An explanation will be given of the tilt angle required to reflect the ultraviolet light incident perpendicularly to the reflecting plate constituting one side of the polygon, which is the cross-sectional shape of the reflecting portion shown in FIG. 6, to the reflecting plate constituting one specific side. It is a schematic diagram. FIG. 7 is a schematic diagram for explaining an inclination angle necessary for vertically reflecting ultraviolet rays from a reflecting plate constituting one side of a polygon which is a cross-sectional shape of the reflecting portion shown in FIG. 6 to a reflecting plate constituting a specific side. is there. It is a relationship diagram between the distance from the ultraviolet light source and the intensity of the ultraviolet light. It is explanatory drawing which shows the positional relationship of the reflection part in the air conditioner of FIG. It is a schematic block diagram which shows the air conditioner which concerns on Embodiment 2 of this invention. It is the figure which showed the time-dependent change of the ultraviolet-ray detection value in the sterilizer with which the air conditioner of FIG. 16 is provided. It is a schematic block diagram which shows the air conditioner which concerns on Embodiment 3 of this invention. It is the figure which showed the time-dependent change of the photon detection part in the sterilizer with which the air conditioner of FIG. 18 is provided. It is a schematic block diagram which shows the air conditioner which concerns on Embodiment 4 of this invention. It is a schematic block diagram which shows the state at the time of washing | cleaning operation | movement of the air path cross-sectional area reduction part in the sterilizer with which the air conditioner of FIG. 20 is provided. It is the schematic block diagram which looked at the air path cross-sectional area reduction part shown in FIG. 21 from the air path side. It is a schematic block diagram which shows the modification of the air conditioner which concerns on Embodiment 4 of this invention. It is a schematic sectional drawing which shows the state at the time of the washing | cleaning of the air path cross-sectional area reduction | decrease part in the sterilizer with which the air conditioner of FIG. 23 is equipped. It is a schematic block diagram of the sterilizer with which the air conditioner which concerns on Embodiment 5 of this invention is provided. It is a schematic block diagram which shows the state at the time of washing | cleaning operation | movement of the air path cross-sectional area reduction part in the sterilizer with which the air conditioner of FIG. 25 is provided. It is the schematic block diagram which looked at the air path cross-sectional area reduction part shown in FIG. 26 from the air path side. It is a schematic block diagram which shows the air conditioner which concerns on Embodiment 6 of this invention. It is a schematic block diagram which shows the state at the time of the sterilization operation | movement of the sterilizer in the air conditioner which concerns on Embodiment 7 of this invention. It is a figure which shows the result of having analyzed the dirt which adhered in the sterilizer with which the air conditioner of FIG. 29 is provided. It is a schematic block diagram which shows the state at the time of the sterilization operation | movement of the sterilizer in the air conditioner of FIG. It is a schematic block diagram which shows the state at the time of the sterilization operation | movement of the sterilizer in the air conditioner which concerns on Embodiment 8 of this invention. It is a schematic block diagram which shows the state at the time of the sterilization operation | movement of the sterilizer in the air conditioner which concerns on Embodiment 9 of this invention. It is a schematic block diagram which shows the state at the time of sterilization operation | movement of the sterilizer which concerns on Embodiment 10 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the form of the component shown to the specification whole sentence is an illustration to the last, and is not limited to these description. That is, the present invention can be modified as appropriate without departing from the spirit or concept of the invention which can be read from the claims and the entire specification. Moreover, the sterilization apparatus with such a change and the air conditioner using the same are also included in the technical idea of the present invention. Furthermore, in each figure, what attached | subjected the same code | symbol is the same or it corresponds, and this is common in the whole text of a specification. In addition, since viruses are not bacteria, “inactivation” is the correct expression for viruses, not “sterilization”. However, in the present invention, the expression “sterilization” is also used for viruses for convenience.

Embodiment 1 FIG.
<Configuration of air conditioner 1>
The air conditioner 1 using the sterilizer 100 according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram showing an air conditioner 1 according to Embodiment 1 of the present invention.
As shown in FIG. 1, the air conditioner 1 includes an air supply port 6 that supplies air, an air passage 7 through which air supplied from the air supply port 6 passes, and air that has passed through the air passage 7. It has a tubular casing 3 provided with an exhaust port 8 for exhausting air. The tubular casing 3 has a pipe 3a on the air supply side and a pipe 3b on the exhaust side. The air conditioner 1 includes an ultraviolet irradiation unit 4 that is installed between the air supply port 6 and the exhaust port 8 and sterilizes the air. Further, the air conditioner 1 is installed between the air supply port 6 and the ultraviolet irradiation unit 4, and the air passage cross-sectional area reduction unit 5 that can adjust the cross-sectional area of the air passage 7, and the air supply port 6 through the exhaust port. And an air blower 2 that generates a flow of air toward 8. The air supplied from the air supply port 6 flows into the air passage 7, and is discharged from the exhaust port 8 through the air passage cross-sectional area reduction unit 5 and the ultraviolet irradiation unit 4 installed in the middle of the air passage 7. Arrows 9 and 10 in FIG. 1 indicate the directions of air flow in the tubes 3a and 3b, respectively. Here, a direction from the air supply port 6 toward the exhaust port 8 is defined as an exhaust direction.

  The ultraviolet irradiation unit 4 includes an ultraviolet light source 21 and a reflection plate 22 that is installed on the wall surface of the air passage 7 and reflects the ultraviolet light emitted from the ultraviolet light source 21, and irradiates the air flowing through the air passage 7 with ultraviolet rays. And sterilize. Details of the ultraviolet irradiation unit 4 will be described later.

  Here, in the case of the air conditioner 1 according to Embodiment 1, the air supply port 6 is used as a supply port for supplying air or water taken in. Moreover, this air conditioner 1 uses the air path 7 through which the air or water supplied from the air inlet 6 passes as a flow path. In addition, the air conditioner 1 uses an exhaust port 8 that exhausts, that is, discharges air or water that has passed through the air passage 7 as a discharge port. Further, the air conditioner 1 uses a casing 3 that is a flow path body having an air supply port 6 as a supply port, an air path 7 as a flow path, and an exhaust port 8 as a discharge port as an air path body. To do. The air conditioner 1 is installed between the air supply port 6 and the exhaust port 8, and is installed between the air supply port 6 and the ultraviolet irradiation unit 4. The air passage cross-sectional area reduction unit 5 that can adjust the cross-sectional area is caused to function as the sterilizer 100. In this case, the ultraviolet irradiation unit 4 has a reflection plate 22 as a reflection unit that reflects the ultraviolet light emitted from the ultraviolet light source 21, and sterilizes by irradiating the air or water flowing through the air passage 7 with ultraviolet rays. .

  The configuration of the air passage cross-sectional area reduction unit 5 will be described. FIG. 2 is a schematic configuration diagram of the air passage cross-sectional area reduction unit 5 of the sterilizer 100 provided in the air conditioner 1 of FIG. 1 as viewed from the air passage side. As shown in FIG. 2, the air passage cross-sectional area reduction unit 5 includes a donut-shaped housing 11 having an opening 11 a concentrically with the diameter of the air passage 7 in the housing 3. The casing 11 is provided with a ring 12 that can rotate along the outer periphery of the casing 11, and twelve cams 13 are installed on the ring 12. In addition, around the opening 11a, twelve flat blades 14 that can rotate around the shaft 16 are attached. In FIG. 2, for ease of understanding, only one blade among the plurality of blades 14 serving as a shield is illustrated, but actually, 12 blades 14 are installed. Also, the arrow in FIG. 2 represents the rotation direction 18 of the ring 12.

  A slit 15 is formed in the blade 14. Each blade 14 is in contact with the corresponding cam 13 and rotates about the shaft 16 in accordance with the movement of the cam 13 accompanying the rotation operation of the ring 12. The blade 14 and the cam 13 are connected via a spring 17.

  FIG. 3 is a schematic configuration diagram illustrating a state during the cleaning operation of the air passage cross-sectional area reducing unit 5 of FIG. FIG. 3 shows a state in which the blade 14 is closed in the air passage cross-sectional area reduction unit 5. 2, when the ring 12 is rotated in the rotation direction 18, the cam 13 is also moved in the rotation direction 18, and the blades 14 are rotated around the shaft 16 accordingly. As shown in FIG. 3, twelve blades 14 are folded over the opening 11 a to shield the opening 11 a except for the slit 15 located at least at the peripheral edge of the air passage 7.

  FIG. 4 is a schematic configuration diagram illustrating a state during the sterilization operation of the sterilizer 100 in the air conditioner 1 of FIG. FIG. 4 shows the air conditioner 1 in a state in which the blade 14 of the air passage cross-sectional area reduction unit 5 is opened as seen from the side. As shown in FIG. 4, when the blade 14 is opened, since the blade 14 is arranged outside the opening 11a, the opening 11a is fully opened. That is, the cross-sectional area of the air passage 7 is not reduced.

  The air passage cross-sectional area reduction unit 5 is configured such that the outer periphery of the opening 11a and the reflection surface of the reflection plate 22 of the ultraviolet irradiation unit 4 are fitted. Further, the airway cross-sectional area reduction unit 5 sets the position of the slit 15 so that the slit 15 is disposed at a position corresponding to the reflecting plate 22 in a state where the blade 14 is closed. That is, the airflow that has passed through the slit 15 is configured to blow on the surface of the reflecting plate 22.

  FIG. 5 is a schematic configuration diagram illustrating a state during a cleaning operation of the sterilizer 100 included in the air conditioner 1 of FIG. 1. FIG. 5 shows the air conditioner 1 in a state in which the blade 14 of the air passage cross-sectional area reduction unit 5 is opened as seen from the side. As shown in FIG. 5, when the blade 14 is closed, the blade 14 is disposed inside the opening 11a. As a result, the opening 11 a is shielded leaving the slit 15, and the airflow flows only through the slit 15. That is, the cross-sectional area of the air passage 7 is reduced more than the state shown in FIG. As described above, the air passage cross-sectional area reducing unit 5 includes the blade 14 as an openable / closable shield that shields a part of the air passage 7 and reduces the cross-sectional area of the air passage 7.

  Next, the ultraviolet irradiation unit 4 will be described. FIG. 6 is an explanatory diagram illustrating a schematic configuration of the ultraviolet irradiation unit 4 in the sterilization apparatus 100 included in the air conditioner 1 of FIG. 1. FIG. 7 is a schematic cross-sectional view of the ultraviolet irradiation unit 4 taken along the line AA of FIG. FIG. 8 is an explanatory view illustrating the shape of the reflector 22 provided in the ultraviolet irradiation unit 4 of FIG.

  As shown in FIG. 6, the ultraviolet irradiation unit 4 includes a germicidal light film generation unit that generates a film-shaped germicidal light film based on the emitted ultraviolet light. Specifically, it has a cylindrical casing 23 that connects an inflow port 24 through which air flows in and an outflow port 25 through which air that flows in from the inflow port 24 flows out. That is, the cylindrical housing 23 has a shape in which both side surfaces are opened by the inflow port 24 and the outflow port 25. Moreover, as shown in FIG.6 and FIG.7, the ultraviolet irradiation part 4 is installed in the inner surface of the ultraviolet light source 21 installed in the outer peripheral part of the cylindrical housing | casing 23, and the cylindrical housing | casing 23, and reflects an ultraviolet-ray. And a reflection plate 22. Here, the direction from the inlet 24 toward the outlet 25 is defined as the outflow direction. The ultraviolet irradiation unit 4 is installed in the housing 3 so that the outflow direction is the same as the exhaust direction. That is, the outflow direction and the exhaust direction are the same as the air traveling direction Da shown in FIG. Hereinafter, the cross-sectional shape along a plane perpendicular to the exhaust direction and the outflow direction is simply referred to as “cross-sectional shape”. The cross-sectional shape corresponds to a front view as viewed from the inlet 24 side in the axial direction of the cylindrical housing 23. In the first embodiment, as shown in FIG. 6, the thickness d of the ultraviolet irradiation unit 4 along the air traveling direction Da is 1 cm.

  6 and 7 indicate the ultraviolet light flux emitted from the ultraviolet light source 21 and reflected by the reflecting plate 22 and the traveling direction thereof. A broken-line arrow 26 in FIG. 6 illustrates the optical axis of the ultraviolet light beam and its traveling direction in a simplified manner. A broken-line arrow 26 in FIG. 7 illustrates the ultraviolet light flux and the traveling direction thereof. Here, the ultraviolet light source 21 emits an ultraviolet light beam, that is, a bundle of light, but hereinafter, the ultraviolet light beam emitted by the ultraviolet light source 21 is also simply referred to as “ultraviolet light”.

The cylindrical housing 23 has a regular dodecagonal cross-sectional shape as seen from the front when viewed from the inflow port 24 side in the axial direction of the cylindrical housing 23. The ultraviolet light source 21 is installed on the outer periphery of the cylindrical housing 23. More specifically, the ultraviolet light source 21 is installed at a position corresponding to one side of a regular dodecagon that is a cross-sectional shape of the cylindrical housing 23. The ultraviolet light source 21 has one or more ultraviolet light emitting elements (not shown), and emits ultraviolet light in a direction perpendicular to the outflow direction and toward the inside of the cylindrical housing 23. The ultraviolet light source 21 in the first embodiment is a UV-LED light source provided with a collimating lens that can emit parallel light having a wavelength of 254 nm at 5 W / cm ² .

  The reflection plate 22 is installed on the inner surface of a cylindrical housing 23 having a regular dodecagonal cross section, and is formed so as to form a ring having a regular dodecagonal cross section. The reflection plate 22 has a prism shape at least part of the surface that reflects the ultraviolet rays, and on the plane perpendicular to the outflow direction of the ultraviolet rays emitted from the ultraviolet light source 21, that is, a cylindrical housing. The light is reflected a plurality of times along the radial direction of the body 23. Here, the “plane perpendicular to the outflow direction” on which ultraviolet rays are reflected has a thickness corresponding to the luminous flux of ultraviolet rays emitted as parallel rays.

  The reflection plate 22 has a plurality of reflection plates 22A to 22J that reflect ultraviolet rays. The plurality of reflecting plates 22 </ b> A to 22 </ b> J constitute each side of a regular dodecagon that is a cross-sectional shape of the reflecting plate 22. That is, as shown in FIG. 3, the plurality of reflecting plates 22 </ b> A to 22 </ b> J are arranged at the positions of eleven sides of the regular dodecagon that is the sectional shape of the reflecting plate 22, and the ultraviolet light source 21 of the reflecting plate 22 </ b> F. A line segment connecting the end portion on the side and the end portion on the ultraviolet light source 21 side of the reflecting plate 22G is the remaining one side. Hereinafter, when collectively referring to the plurality of reflection plates 22A to 22J, or when referring to any one of the plurality of reflection plates 22A to 22J, it is also simply referred to as “reflection plate 22”.

  As shown in FIG. 8, the reflecting plate 22 includes a flat member 27 along the inner surface of the cylindrical housing 23 and a reflecting member 28 located on the inner surface side of the flat member 27. That is, the reflecting plate 22 is formed by integrally forming a thin plate-like flat member 27 and a reflecting member 28 having a prism-shaped surface.

  As for the flat member 27, the flat surface 27a which is a surface facing the inner surface of the cylindrical housing | casing 23 is flat. The cross-sectional shape of the reflecting member 28 is a shape in which right-angled triangles having oblique sides inclined by an inclination angle α with respect to the flat surface 27a are arranged adjacent to each other, and the surface corresponding to the oblique side reflects the ultraviolet rays. 28a. The inclination angle α of each of the plurality of reflecting plates 22A to 22J is set in advance so that the ultraviolet rays widely fly over the entire area inside the cylindrical housing 23. In the first embodiment, the surface shape of the reflecting member 28 having a cross-sectional shape in which a plurality of right triangles are arranged adjacent to each other is referred to as a prism shape.

  Here, the inclination angle α and the inclination direction of the reflection surface 28a with respect to the flat surface 27a of the reflection plate 22 will be specifically described. On the inner surface of the cylindrical housing 23, a reflection plate 22A is provided at a position facing the ultraviolet light source 21, and reflection plates 22B to 22K are provided clockwise therefrom. The ultraviolet light source 21 is arranged so that the emitted ultraviolet light is irradiated perpendicularly to the reflecting plate 22A. In addition, since the cross-sectional shape of the ultraviolet irradiation part 4 is a regular dodecagon, each reflecting plate 22 has the reflecting plate 22 which opposes.

  As shown in FIG. 7, the reflecting plate 22A, the reflecting plate 22G, the reflecting plate 22I, and the reflecting plate 22J are formed in a prism shape so that the inclination angle α rises to the right at 15 °. In addition, the reflecting plate 22B, the reflecting plate 22C, the reflecting plate 22E, and the reflecting plate 22K are formed in a prism shape so as to rise to the left at an inclination angle α of 15 °. The reflecting plate 22D is formed in a prism shape so as to rise to the right when the inclination angle α is 7.5 °. The reflecting plate 22H is formed in a prism shape so as to rise to the left when the inclination angle α is 7.5 °. The reflecting plate 22F is a flat surface.

  FIG. 9 is an explanatory diagram regarding an incident angle and a reflection angle of light. FIG. 10 is a schematic diagram for explaining an inclination angle of the reflecting surface 28a with respect to the flat surface 27a when ultraviolet rays are vertically incident on the reflecting plate 22 illustrated in FIG. FIG. 11 is a schematic diagram for explaining an inclination angle of the reflecting surface 28a with respect to the flat surface 27a when ultraviolet rays are vertically reflected from the reflecting plate 22 illustrated in FIG.

  As shown in FIG. 9, when light passes through the air and is reflected by a metal plate or the like, the reflection law that the incident angle of the incident light 71 is equal to the reflection angle of the reflected light 72 is established. In FIG. 9, the incident angle and the reflection angle are indicated as “β”. The incident angle and the reflection angle are defined as an angle between the traveling direction of each light and a normal line 73 that is a perpendicular line of the reflecting surface 28a.

  As shown in FIG. 10, when the inclination angle α is taken, when the ultraviolet rays are incident on the flat surface 27a of the reflecting plate 22 perpendicularly, the inclination angle α is equal to the incident angle and the reflection angle. For this reason, the reflection surface 28a having the same inclination angle α as the reflection angle corresponding to the direction to be reflected is formed, and ultraviolet light is incident on the flat surface 27a so that the reflected light 72 travels relative to the incident light 71. The direction can be controlled.

  In addition, as shown in FIG. 11, when it is desired to reflect ultraviolet rays perpendicularly to the flat surface 27a of the reflecting plate 22, it has the same inclination angle α as the reflection angle corresponding to the reflected light 72 perpendicular to the flat surface 27a. The reflective surface 28a is formed. Then, the traveling direction of the reflected light 72 with respect to the incident light 71 can be controlled by making ultraviolet light incident on the reflecting surface 28 a so as to have the same incident angle as the inclination angle α.

  FIG. 12 is a view for reflecting the ultraviolet rays perpendicularly incident on the reflecting plate 22 constituting one side of the polygon which is the cross-sectional shape of the reflecting plate 22 shown in FIG. 6 to the reflecting plate 22 constituting one specific side. It is a schematic diagram explaining a required inclination angle. In FIG. 12, a point where ultraviolet rays are generated is illustrated as a light beam generation point s, and a point on the reflection plate 22A where the ultraviolet light emitted from the light beam generation point s is incident and reflected is illustrated as a light beam reflection point a. In addition, in FIG. 12, the points on the reflection plate 22E are illustrated as the light beam reflection points e among the points where the ultraviolet rays reflected at the light beam reflection points a arrive and reflect, and the points on the reflection plate 22F are illustrated as the light beam reflection points f. As an example. In addition, in FIG. 12, the center of the regular dodecagon that is the cross-sectional shape of the reflecting plate 22 is shown as the center portion m. With reference to FIG. 12, a description will be given of an inclination angle necessary for reflecting an incident ultraviolet ray to another reflecting plate 22 when the ultraviolet ray is vertically incident on one reflecting plate 22.

  First, it will be described that ultraviolet rays are incident on the reflecting plate 22A perpendicularly and reflected by the fifth reflecting plate 22F in the clockwise direction. As shown in FIG. 8, in the triangle connecting the light beam generation point s, the light beam reflection point a, and the center portion m, the length between ms and the length between ma is the radius of a circle connecting the vertices of a regular dodecagon. Since they are equal, an isosceles triangle with an angle sma of 150 ° is obtained. Therefore, the angle mas is 15 °.

  When the ultraviolet light incident perpendicularly to the reflecting plate 22A is reflected by the reflecting plate 22F, the angle obtained by adding the incident angle and the reflection angle needs to be the angle mas, so the incident angle and the reflection angle are 7.5 °. . Therefore, the ultraviolet irradiation unit 4 can reflect the ultraviolet rays incident perpendicularly to the reflection plate 22A to the reflection plate 22F by installing the reflection plate 22A having the reflection surface 28a that rises to the right at an inclination angle of 7.5 °. it can.

  Next, a case where ultraviolet rays are incident on the reflecting plate 22A perpendicularly and reflected by the fourth reflecting plate 22E in the clockwise direction will be described. As shown in FIG. 8, the triangle connecting the center part m, the light beam reflection point a, and the light beam reflection point e is the radius of the circle connecting the apex of the regular dodecagon with the length between ma and the length between me. Since they are equal, an isosceles triangle with an angle ema of 150 ° is obtained. Therefore, the angle mae is calculated as 15 °.

  In the case where the ultraviolet light incident perpendicularly to the reflector 22A is reflected by the reflector 22E, the incident angle as the angle sam and the reflection angle as the angle mae are each 15 °. Therefore, the ultraviolet irradiating unit 4 can reflect the ultraviolet rays incident perpendicularly to the reflecting plate 22A to the reflecting plate 22E by installing the reflecting plate 22A having the reflecting surface 28a that rises to the right at an inclination angle of 15 °.

  FIG. 13 shows an inclination necessary for vertically reflecting ultraviolet rays from the reflecting plate 22 constituting one side of the polygon which is the cross-sectional shape of the reflecting plate 22 shown in FIG. 6 to the reflecting plate 22 constituting one specific side. It is a schematic diagram explaining an angle. FIG. 13 shows a light beam generation point s, a light beam reflection point a, a light beam reflection point e, and a central portion m, as in FIG. Further, in FIG. 13, a point on the reflector 22J where the ultraviolet ray reflected at the light beam reflection point e reaches and reflects is illustrated as a light beam reflection point j.

  Here, with reference to FIG. 13, a description will be given of an inclination angle necessary for reflecting an incident ultraviolet ray perpendicularly to the other one reflection plate 22 when the ultraviolet ray is incident on one reflection plate 22. . Here, the central angle obtained by equally dividing 360 °, which is the angle of the center of the regular dodecagon, by 12 which is the number of polygons is 30 °. Therefore, in a regular dodecagon, one side and the sixth side clockwise from there are always parallel lines and face each other. Therefore, when ultraviolet rays are reflected vertically from a certain side, the reflected ultraviolet rays are always incident perpendicularly on the flat surface 27a of the opposing reflecting plate 22 having a regular dodecagon. Therefore, referring to FIG. 9, the ultraviolet rays from reflector 22A are incident on reflector 22E, and the incident ultraviolet rays are reflected from reflector 22E in the direction perpendicular to flat surface 27a, and the opposite surface of the regular dodecagon. A description will be given of incident on the reflector 22J located at the center.

  As shown in FIG. 13, the triangle connecting the center part m, the light beam reflection point a, and the light beam reflection point e has a radius of a circle in which the length between ma and the length between me connect the vertices of a regular dodecagon. Therefore, an isosceles triangle with an angle ema of 150 ° is obtained. Therefore, the angle aem is calculated as 15 °. In addition, the triangle connecting the center part m, the light beam reflection point e, and the light beam reflection point j has a length between me and the length between mj equal to the radius of a circle whose apex is a regular dodecagon, so the angle jme Becomes an isosceles triangle of 150 °. Therefore, the angle mej is calculated as 15 °.

  When the ultraviolet rays reflected by the reflecting plate 22A and then reflected perpendicularly to the flat surface 27a by the reflecting plate 22E are reflected by the reflecting plate 22J located on the opposing surface of the regular dodecagon, the incident angle is an angle mea. , And the angle of reflection, which is the angle mej, is 15 °. Therefore, the ultraviolet irradiating unit 4 installs the reflecting plate 22E having the reflecting surface 28a that rises to the left at an inclination angle of 15 °, and thereby correctly reflects the ultraviolet rays reflected perpendicularly to the flat surface 27a of the reflecting plate 22E. The light can enter the reflecting plate 22J located on the opposing surface of the square.

Based on the above calculation method of the angle of the reflection surface 28a of the reflection plate 22 with respect to the incident angle and the reflection angle, in the first embodiment, as described above, the shape of the reflection surface 28a included in each reflection plate 22 is as follows. It is produced as follows.
The reflecting plate 22A, the reflecting plate 22G, the reflecting plate 22I, and the reflecting plate 22J have a prism shape that rises to the right when the inclination angle α is 15 °.
The reflecting plate 22B, the reflecting plate 22C, the reflecting plate 22E, and the reflecting plate 22K have a prism shape that rises to the left when the inclination angle α is 15 °.
The reflecting plate 22D has a prism shape that rises to the right when the inclination angle α is 7.5 °.
The reflecting plate 22H has a prism shape that rises to the left when the inclination angle α is 7.5 °.
The reflecting plate 22F has a planar shape.

  According to the reflection plate 22 produced in this way, the ultraviolet rays are reflected along the radial direction by all the reflection plates 22 starting from the incidence of the ultraviolet rays perpendicular to the reflection plate 22A. At this time, the ultraviolet rays are reflected along the radial direction in the order of the reflecting plates 22A, 22E, 22J, 22C, 22H, 22D, 22I, 22B, 22G, 22K, and 22F. In addition, since the surface shape of the reflection plate 22F is a planar shape, the ultraviolet light incident perpendicularly from the reflection plate 22K is totally reflected by the reflection plate 22F and reflected perpendicularly to the reflection plate 22K. Thereafter, due to the relationship between the incident angle and the reflection angle, the ultraviolet rays are reflected in the reverse order of the reflecting plates 22K, 22G, 22B, 22I, 22D, 22H, 22C, 22J, 22E, and 22A, and further reflected along the radial direction. Continue.

  That is, in the ultraviolet irradiation unit 4, the ultraviolet light incident perpendicularly to the reflecting plate 22A is reflected in the traveling direction indicated by the broken line arrow 26 in FIG. 7 and reflected in the traveling direction opposite to the broken line arrow 26. Repeat alternately. As a result, as shown in FIG. 7, the ultraviolet light emitted from the ultraviolet light source 21 of the ultraviolet irradiation unit 4 is reflected on the entire surface of the ultraviolet irradiation unit 4 through which air passes. Thus, the ultraviolet irradiation part 4 produces | generates the film-form germicidal light film based on an ultraviolet-ray. That is, since the ultraviolet irradiation unit 4 forms a film-like germicidal light film based on ultraviolet rays inside the cylindrical housing 23, the entire surface perpendicular to the outflow direction can be sterilized. That is, according to the ultraviolet irradiation part 4, since the irradiation amount of the ultraviolet rays in the cylindrical housing | casing 23 increases compared with the case where an ultraviolet-ray is not reflected, a high bactericidal effect can be acquired.

  By the way, although microorganisms in the air adhere to and float on coughs, tongues, dust, etc., the ultraviolet rays are reflected at a plurality of angles in the ultraviolet irradiation unit 4, so the shade of the attached matter is small. Become. For this reason, in the ultraviolet irradiation part 4, ultraviolet rays are irradiated to more microorganisms, and air can be sterilized efficiently.

  FIG. 14 is a relationship diagram between the distance from the ultraviolet light source 21 and the intensity of the ultraviolet light. The intensity of light attenuates according to the inverse square law when light is divergently emitted by a point light source. On the other hand, parallel rays with strong directivity do not diverge and the irradiation area advances equally, so that the intensity is not easily attenuated.

  In this respect, since the ultraviolet light source 21 emits ultraviolet light as a highly directional parallel light beam through the collimator lens, the ultraviolet light irradiation unit 4 reduces the intensity of the ultraviolet light as shown by a graph L indicated by a solid line in FIG. Can be suppressed. In other words, the ultraviolet light reflected by the reflector 22 of the ultraviolet irradiation unit 4 only decreases in irradiation intensity due to reflection, and proceeds with almost no attenuation of intensity even when passing through the air. Therefore, ultraviolet rays are irradiated on the entire inner surface of the reflection plate 22 of the ultraviolet irradiation unit 4, and the intensity thereof increases from the intensity at the time of emission according to the number of reflections. As a result, in the entire inside of the cylindrical housing 23 of the ultraviolet irradiation unit 4, the intensity of ultraviolet rays increases according to the number of reflections, and the sterilization efficiency of microorganisms contained in the air can be increased. If the ultraviolet light source 21 is not equipped with a collimating lens or the like, the intensity of the ultraviolet light is attenuated according to the inverse square law as shown by a graph N indicated by a broken line in FIG.

  Since the ultraviolet irradiation unit 4 in the first embodiment reflects ultraviolet rays over the entire cross section of the ultraviolet irradiation unit 4, the amount of ultraviolet irradiation can be increased. For this reason, air can be sterilized efficiently by allowing microorganisms floating in the air to pass through the ultraviolet irradiation unit 4. Moreover, since the ultraviolet irradiation part 4 has the opening of the whole side surface of the cylindrical housing | casing 23 and the opening area with respect to the advancing direction Da of air is large, the pressure loss by the ultraviolet irradiation part 4 can be reduced.

  Furthermore, since the ultraviolet light source 21 and the reflector 22 of the ultraviolet irradiation unit 4 are arranged so that the ultraviolet rays are emitted or reflected perpendicularly to the traveling direction Da of the air, as shown in FIG. The optical axis is emitted or reflected perpendicularly to the traveling direction Da of air. Therefore, even if the casing has a side opening such as the cylindrical casing 23, the ultraviolet rays irradiated from the ultraviolet light source 21 are reflected outside the ultraviolet irradiation section 4 with respect to the air traveling direction Da. Therefore, it is not necessary to consider the deterioration of the member and the influence on the human body due to the leakage of ultraviolet rays.

  In addition, since the ultraviolet irradiation section 4 has a small thickness d in the air traveling direction Da, the ultraviolet irradiation distance in the air traveling direction Da does not increase, so that the apparatus is prevented from becoming large and compact. Design becomes possible.

  Further, as shown in FIGS. 7 and 8, the reflecting plate 22 of the ultraviolet irradiating unit 4 has a prism shape, so that dust floating in the air is formed into a prism shape on the inlet 24 side of the reflecting plate 22. There is a possibility of colliding with and adhering to the cross-sectional end of the. Therefore, it is desirable that the prism-shaped cross-sectional end of the reflecting plate 22 on the inlet 24 side be antifouling coated. As an antifouling coating, the coating using the coating material containing modified polyvinyl alcohol and a crosslinking agent, or the coating using the coating material containing carboxymethylcellulose, polyethyleneglycol, and a crosslinking agent, etc. are employable, for example.

  FIG. 15 is an explanatory diagram showing the positional relationship between the reflecting plate 22 and the inner wall surface of the tube 3a in the air conditioner 1 of FIG. As shown in FIG. 15, you may comprise so that the internal diameter of the reflecting plate 22 of the ultraviolet irradiation part 4 may become more than the internal diameter of the housing | casing 3 (pipe 3a). In this case, since the prism-shaped convex portion of the reflecting plate 22 is configured not to jump inward from the inner wall surface 30 of the housing 3 (tube 3a), the prism-shaped convex portion on the inlet 24 side of the reflecting plate 22 is formed. The possibility that dust floating in the air collides and adheres to the end of the cross section becomes low. For this reason, it is possible to suppress adhesion of dust and the like to the prism-shaped cross-sectional end of the reflecting plate 22 on the inlet 24 side. Moreover, since the collision of air with the prism-shaped cross-sectional end of the reflecting plate 22 on the inlet 24 side is reduced, pressure loss can be reduced.

  The ultraviolet light source 21 will be described. First, the ultraviolet wavelength region will be described. Light is a type of electromagnetic wave and has energy. The energy is calculated from the following formula 1.

  In Equation 1, E is the energy of ultraviolet rays, h is the Planck constant (6.63 × 10 −34 J · s = 4.1 × 10 −15 eV · s), ν is the frequency of ultraviolet rays, and c Is the speed of light (3.0 × 108 m / s), and λ is the wavelength of ultraviolet rays. FIG. 13 shows energy E for each wavelength from 200 nm to 350 nm, and the energy per electron decreases as the wavelength λ increases.

  By the way, ultraviolet rays having a wavelength of 200 nm to 350 nm act on a nucleic acid which is a protoplasm of bacteria to inhibit DNA replication and sterilize microorganisms by taking away the growth ability. In addition, ultraviolet rays having a wavelength of 200 nm to 350 nm sterilize microorganisms by destroying proteins and the like, which are substances forming the cytoplasm and cell membrane, and killing bacteria. In particular, the bactericidal effect is the highest near the wavelength of 260 nm.

  Moreover, if the sterilization effect per 1V of each wavelength is high, it can be said that it can sterilize efficiently. That is, it can be said that the ultraviolet wavelength region having the effect of sterilizing microorganisms is 200 nm to 350 nm, and as the ultraviolet light emitted from the ultraviolet light source 21, one having a wavelength of 200 nm to 350 nm can be used. However, it is desirable to use ultraviolet rays having a wavelength of 240 nm to 290 nm that can efficiently sterilize while suppressing energy consumption.

  As the ultraviolet light emitting element used for the ultraviolet light source 21, an ultraviolet light emitting diode (ultraviolet LED) that irradiates ultraviolet rays having a wavelength of 200 nm to 350 nm having an effect of sterilizing microorganisms can be used. Desirably, the wavelength of the ultraviolet light irradiated by the ultraviolet light emitting element is 240 nm to 290 nm.

  The ultraviolet light source has a structure that irradiates parallel light with strong directivity in addition to the ultraviolet light emitting element. In the first embodiment, a structure in which a collimating lens is arranged inside an ultraviolet light emitting element is adopted as a structure for irradiating parallel light rays having strong directivity. However, the present invention is not limited to this, and instead of the collimating lens, for example, Fresnel A lens may be provided. Moreover, you may make it the structure which provides a reflecting plate behind a light source.

  The ultraviolet light emitting element and the collimating lens may be packaged or modularized as the ultraviolet light source 21. The ultraviolet light source 21 can be easily installed by packaging or modularizing the ultraviolet light emitting element and the collimating lens.

  In addition, the ultraviolet light emitting element emits parallel rays of ultraviolet rays from the entire surface of the reflecting plate 22 on which the ultraviolet light source 21 is installed, which is composed of a side along the air traveling direction Da and a side of a regular dodecagon having a cross-sectional shape. One or more are arranged so that can be emitted.

Next, a method for producing the reflecting plate 22 having a prism shape on the surface will be described.
First, the prism shape of the reflecting plate 22 will be described. The average pitch Ap which is the length of the flat surface of each right triangle in the prism shape shown in FIG. 8 may be 0.01 to 10 mm, and preferably 0.1 to 10 mm.

  Next, the ground material of the reflector 22 will be described. The term “ultraviolet reflective material” refers to a material having a reflectance of 40% or more, preferably 60% or more, more preferably 70% or more, for example, with respect to ultraviolet rays having a wavelength of 250 nm to 270 nm, particularly 265 nm. Examples of the ultraviolet reflector that can be suitably used in the present invention include chromium (ultraviolet ray reflectivity: about 50%), platinum (ultraviolet ray reflectivity: about 50%), rhodium (ultraviolet ray reflectivity: about 65%), magnesium carbonate ( UV reflectance: about 75%). In addition, calcium carbonate (ultraviolet reflectance: about 75%), magnesium oxide (ultraviolet reflectance: about 90%), aluminum (ultraviolet reflectance: about 90%), and the like can be given. In addition, if these ultraviolet reflective materials are subjected to a surface treatment such as a plating method or a vapor deposition method, a surface having a high reflectance can be obtained.

Moreover, since aluminum is excellent in workability, it can be suitably used as an ultraviolet reflecting material. Further, as a surface treatment of aluminum, coating with silicon dioxide SiO ₂ or magnesium fluoride MgF ₂ protects the surface of the aluminum material and makes it difficult for dust or dirt to adhere thereto.

  Next, a method for forming the reflecting plate 22 having a prism shape on the surface will be described. First, a mold having the shape of the reflector 22 is produced. A material plate of the reflector 22 cut to a length of about the thickness d of the cylindrical housing 23 with respect to the air traveling direction Da is installed on the produced mold, and the installed material plate is manually bent, pressed, Processing is performed by roll bending or mechanical bending such as roll forming. And the reflecting plate 22 can be formed by bend | folding the processed material board in a polyhedron shape. Further, the reflection plate 22 may be formed by cutting and processing a metal plate having a thickness larger than the average depth.

  Further, the reflecting plate 22 may be manufactured by forming a base material having the same shape as the reflecting plate 22 using a material other than the metal as described above, and then depositing a metal powder paste on the surface thereof. . In this case, a mold having the shape of the reflector 22 can be produced, and a member serving as a base material can be produced by press working, injection molding, compression molding, or the like using a resin material. Then, the metal powder paste used as a reflecting material is vapor-deposited on the surface layer of the base material to form the reflecting plate 22. As described above, when the reflecting plate 22 is formed by combining the resin material and the vapor deposition of the metal powder paste, there are advantages that the material cost is lower than that using the metal plate and that the metal material is easier to mold.

  As the resin material for base material molding, thermoplastic resins such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), and ABS resin can be used. Moreover, the base material of the reflecting plate 22 may be molded using a thermosetting resin such as a phenol resin, an amino resin, an epoxy resin, or a urethane resin, which is a plastic material other than the above. Furthermore, the base material of the reflecting plate 22 may be molded using synthetic fibers such as polyisoprene and butadiene, nylon, vinylon, acrylic fibers, and rayon.

  In the first embodiment, the case where the cross-sectional shape of the ultraviolet irradiation unit 4, that is, the front view when viewed from the inlet 24 side in the axial length direction of the cylindrical housing 23 is a regular dodecagon has been described. It is not limited to. The reflecting plate 22 is arranged so that the ultraviolet rays are reflected on the entire cross section of the ultraviolet irradiation unit 4, that is, reflected along the radial direction of the cylindrical housing 23. If the reflecting surface 28a is processed, the cross-sectional shape of the ultraviolet irradiating unit 4 is a regular polygon having a different number of vertices, a polygon having a different side length, or a polygon having an interior angle freely set. May be.

  Further, the prism shape on the surface of the reflecting plate 22 is exemplified by a shape in which right-angled triangles having oblique sides inclined by the inclination angle α with respect to the flat member 27 are adjacent to each other. Other shapes may be adopted as long as the shape can reflect the ultraviolet rays to the plate 22. Further, in the first embodiment, the case where the reflecting member 28 of the reflecting plate 22 has a prism shape is illustrated. However, the present invention is not limited thereto, and the reflecting surface 28a of each reflecting member 28 is a flat surface of the flat member 27, respectively. You may form so that only the angle set with respect to 27a may incline. That is, the cross-sectional shape of the reflecting member 28 may be a right triangle shape having a hypotenuse inclined by the inclination angle α with respect to the flat member 27. Moreover, it is not necessary to have a prism shape, and a simple flat mirror may be used as long as the reflection can be performed inside the ultraviolet irradiation unit 4 of ultraviolet parallel rays.

  In the first embodiment, the structure in which one ultraviolet light source 21 is arranged is illustrated. However, the configuration is not limited to this, and the ultraviolet irradiation unit 4 may be configured by installing a plurality of ultraviolet light sources 21. In such a case, the ultraviolet light sources 21 may be installed at a predetermined interval. Thus, if a plurality of ultraviolet light sources 21 are installed in the ultraviolet irradiation unit 4, the emission intensity can be increased and the sterilizing effect can be increased. In the first embodiment, the structure in which ultraviolet rays are emitted vertically to the reflecting plate 22 facing the ultraviolet light source 21 has been described, but the present invention is not limited to this. For example, if the prism shape of the reflection plate 22 can be designed so that ultraviolet rays repeatedly reflect inside the cylindrical housing 23, the ultraviolet light source 21 is configured to irradiate the reflection plates 22 other than the reflection plate 22A with ultraviolet rays. Also good.

  Further, in the first embodiment, the thickness d of the ultraviolet irradiation unit 10d with respect to the air traveling direction Da, that is, the thickness of the film-like germicidal light film based on the ultraviolet rays generated by the ultraviolet irradiation units 4, 10c, and 10d is 1 cm. However, the present invention is not limited to this. For example, if the thickness d is thicker than 1 cm, the sterilizing effect increases because the ultraviolet irradiation time becomes longer. On the other hand, if the thickness d is less than 1 cm, a compact design is obtained, which has the advantage that it can be mounted in a relatively small device. Since the sterilization effect and the compact design are in a trade-off relationship, an appropriate thickness is selected based on the desired sterilization effect and physical constraints of the apparatus.

  Next, the operation of the air conditioner 1 will be described. The operation is largely divided into two. During normal operation of the air conditioner 1, the air passing through the air path 7 is continuously sterilized by the ultraviolet irradiation unit 4. This is a sterilization operation. When dust or dirt adheres to the reflector 22, the air passage cross-sectional area reducing unit 5 reduces the cross-sectional area of the air passage 7 to remove the dust or dirt and clean the reflector 22. I do. This is a cleaning operation. In the first embodiment, the timer control is performed so that the sterilization operation for one week and the cleaning operation for 15 minutes are repeated as a set.

<Sterilization action>
First, the sterilization operation will be described. In the sterilization operation, the blade 14 is stored outside the opening 11a so as not to obstruct the air flow (FIG. 2), and there is no pressure loss in the air passage cross-sectional area reduction portion 5. In this state, air is passed through the casing 3 by the blower 2 and the ultraviolet irradiation unit 4 is operated to sterilize the air passing through the air passage 7. Since the opening 11a is fully open and the cross-sectional area of the air passage 7 is not reduced, the air passing through the air passage 7 can be sterilized efficiently.

<Cleaning operation>
Next, the cleaning operation will be described. When the sterilization operation is performed for a long period of time, dust or dirt floating in the atmosphere adheres to the reflection plate 22, thereby reducing the reflectance of ultraviolet rays. When the reflectance of ultraviolet rays decreases, the amount of ultraviolet irradiation inside the ultraviolet irradiation unit 4 decreases, and the sterilization efficiency decreases. Moreover, since dust or dirt has an action of scattering light, ultraviolet rays leak out to the outside of the ultraviolet irradiation unit 4 and deteriorate the members of the housing 3. In order to remove such dust or dirt and to clean the reflecting plate 22, the following cleaning operation is performed.

  In the cleaning operation, the air passage cross-sectional area reducing unit 5 shields a part of the air passage 7 and reduces the cross-sectional area of the air passage 7. Specifically, the ring 12 and the cam 13 of the air passage cross-sectional area reduction part 5 are rotated in the rotation direction 18 (FIG. 2), and the air passage 7 is shielded by 12 blades 14 leaving 12 slits 15. (Figure 3). As a result, the cross-sectional area of the air passage 7 is reduced as compared with the sterilization operation.

  When air is blown into the housing 3 by the blower 2 in this state, the air flows through the slit 15 in the air passage cross-sectional area reduction unit 5. An arrow 29 in FIG. 15 indicates the direction in which the airflow that has passed through the slit 15 flows. By passing through the slit 15 having a smaller area than the cross-sectional area of the tube 3a and the opening 11a, the flow velocity of the airflow is increased. The airflow having an increased flow velocity through the slit 15 flows at high speed on the surface of the reflecting plate 22 (corresponding to A in the number of the reflecting plate), so that dust or dirt adhered to the surface of the reflecting plate 22 is obtained. Can be physically blown off to clean the surface of the reflector 22.

  The wind speed of the airflow blown out from the slit 15 depends on the area of the slit 15 or the cross-sectional area of the tube 3a. Depending on the affinity of the dust or dirt to the reflector 22, the specific gravity, and the presence or absence of water or oil, the appropriate wind speed for blowing away varies, so it is necessary to set the wind speed according to the nature of the dust or dirt. Here, it is assumed that the blower 2 has a specification capable of producing a constant air volume without being affected by pressure loss, and the total area of the slit 15 is set to 1/4 of the cross-sectional area of the tube 3a. Thereby, the wind speed of the airflow which passed the slit 15 was set so that it might become 12 m / s which is 4 times the wind speed 3 m / s in the pipe | tube 3a.

  Moreover, as shown in FIGS. 3 and 5, the slit 15 is preferably disposed at a position corresponding to the peripheral edge of the air passage 7 in the cleaning operation. That is, it is preferable that the airway cross-sectional area reduction part 5 is shielded leaving at least a peripheral part of the airway 7. As a result, the airflow that has passed through the slit 15 easily hits the surface of the reflector 22, so that dust or dirt can be more efficiently removed.

<Effect in Embodiment 1>
As described above, the air conditioner 1 according to the first embodiment includes the air passage cross-sectional area reduction unit 5 disposed between the air supply port 6 and the ultraviolet irradiation unit 4, and the air passage cross-sectional area. The reducing unit 5 has a function of shielding a part of the air passage 7 and reducing the cross-sectional area of the air passage 7. Thereby, it is possible to easily remove dust or dirt attached to the reflection plate 22 using the air flow without disassembling the apparatus. Then, by removing dust or dirt adhering to the reflecting plate 22, it recovers from the state where the reflectivity of the reflecting plate 22 is reduced, and the ultraviolet irradiation amount inside the ultraviolet irradiating unit 4 is restored. Reduction of the effective sterilization efficiency can be suppressed. Further, by removing the dust or dirt on the reflection plate 22, scattering of ultraviolet rays is suppressed, and leakage of ultraviolet rays to the outside of the ultraviolet irradiation unit 4 is suppressed. As a result, deterioration of the member of the housing 3 can be prevented.

  In addition, the timer control that repeatedly performs the sterilization operation for a certain period and the washing operation for a certain period as a set makes it possible to automatically and regularly remove dust or dirt adhering to the reflector 22 and easily irradiate ultraviolet rays. It becomes possible to maintain the sterilizing effect of the part 4.

  Furthermore, although the air conditioner 1 is shown as an example in the first embodiment, it can be similarly configured in a blower, a refrigerator, or a freezer, and has the same sterilizing effect and cleaning effect.

Embodiment 2. FIG.
Next, an air conditioner 1 according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 16 is a schematic configuration diagram showing an air conditioner 1 according to Embodiment 2 of the present invention.
Compared with the air conditioner 1 of the first embodiment, the air conditioner 1 of the second embodiment has an ultraviolet ray detection unit 31 as a first detection unit that detects the intensity of ultraviolet rays inside the ultraviolet ray irradiation unit 4. Is different.

  As shown in FIG. 16, the air conditioner 1 of the second embodiment includes an ultraviolet detection unit 31 on the surface of the reflection plate 22 of the ultraviolet irradiation unit 4. Although the ultraviolet detection unit 31 may be provided on any of the reflection plates 22, it is suitable to be mounted on the surface of the reflection plate 22 </ b> F having a planar shape.

  Specific examples of the ultraviolet detector 31 are, for example, a photodiode made of a nitride semiconductor, an optical FET (field effect transistor), a photomultiplier, a UV tron, etc., which can detect ultraviolet rays. So long as it does not matter.

  FIG. 17 is a diagram illustrating a change with time in the ultraviolet detection value in the sterilization apparatus 100 included in the air conditioner 1 of FIG. In FIG. 17, the horizontal axis represents the elapsed time of the sterilization operation, the vertical axis represents the ultraviolet intensity, and the output of the ultraviolet detector 31 is converted into the ultraviolet intensity and displayed. Since the ultraviolet intensity is substantially proportional to the ultraviolet intensity inside the ultraviolet irradiation section 4, this ultraviolet intensity can be substituted for the ultraviolet intensity inside the ultraviolet irradiation section 4. As shown in FIG. 17, the ultraviolet intensity decreases with the lapse of time of the sterilization operation. When the ultraviolet intensity falls below a preset threshold value, it is determined that dust or dirt has adhered to the reflecting plate 22, and the air passage cross-sectional area reduction unit 5 is operated to perform a cleaning operation. The air passage cross-sectional area reducing unit 5 may be set to automatically operate based on the ultraviolet intensity, or the operator may check the ultraviolet intensity and manually operate the air path cross-sectional area reducing unit 5. .

<Effect in Embodiment 2>
As described above, according to the second embodiment, in addition to the function and effect of the first embodiment, the amount of dust or dirt attached to the reflecting plate 22 is accurately detected by using the ultraviolet ray detection unit 31. And the timing of the cleaning operation can be determined more appropriately.

Embodiment 3 FIG.
Next, the air conditioner 1 according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 18 is a schematic configuration diagram showing an air conditioner 1 according to Embodiment 3 of the present invention.
The air conditioner 1 according to the third embodiment is different from the air conditioner 1 according to the first embodiment in that a light detection unit 32 is installed outside the ultraviolet irradiation unit 4 in the sterilizer 100.

  As shown in FIG. 18, the air conditioner 1 according to the third embodiment detects light as a second detection unit that detects the intensity of ultraviolet light or visible light inside a tube 3 b that is downstream of the ultraviolet irradiation unit 4. The unit 32 is provided. In the third embodiment, the light detection unit 32 is provided on the downstream side of the ultraviolet irradiation unit 4. However, the light detection unit 32 may be provided on the upstream side of the ultraviolet irradiation unit 4 as long as it does not interfere with the air passage cross-sectional area reduction unit 5. Good.

  When dust or dirt adhering to the reflection plate 22 of the UV irradiation unit 4 is irradiated with UV light, the UV light is scattered in all directions by dust or dirt. In addition, dust or dirt that adheres to the reflector 22 of the ultraviolet irradiation unit 4 is often fluorescent. For example, there is a substance that emits blue light, which is visible light, when irradiated with ultraviolet rays. When ultraviolet rays are irradiated to dust or dirt having fluorescence, fluorescence is emitted in all directions. By detecting these scattered ultraviolet rays or fluorescence by the light detection unit 32 installed on the upstream side or downstream side of the ultraviolet irradiation unit 4, it is possible to detect that dust or dirt has adhered to the reflection plate 22.

  Specific examples of the light detection unit 32 include the same ultraviolet detector as in the second embodiment, for example, a photodiode made of a nitride semiconductor, an optical FET (field effect transistor), a photomultiplier tube, a UV tron, and the like. Is appropriate. Further, the light detection unit 32 is not limited to the ultraviolet detector, and may be a unit capable of measuring visible light.

  FIG. 19 is a diagram illustrating a change with time of the light detection unit 32 in the sterilization apparatus 100 included in the air conditioner 1 of FIG. The horizontal axis is the elapsed time of the sterilization operation, the vertical axis is the light intensity, and the output of the light detection unit 32 is converted into the light intensity and displayed. Since the light intensity is substantially proportional to the amount of dust or dirt adhering to the reflecting plate 22, this light intensity can be used as a substitute for the cleanliness of the reflecting plate 22. As shown in FIG. 19, the light intensity increases with the lapse of time of the sterilization operation. When the light intensity exceeds a preset threshold value, it is determined that dust or dirt has adhered to the reflection plate 22, and the air passage cross-sectional area reduction unit 5 is operated to perform a cleaning operation. The air passage cross-sectional area reducing unit 5 may be set to automatically operate based on the ultraviolet intensity, or the operator may check the ultraviolet intensity and manually operate the air path cross-sectional area reducing unit 5. .

<Effect in Embodiment 3>
As described above, according to the third embodiment, in addition to the function and effect of the first embodiment, the amount of dust or dirt attached to the reflecting plate 22 is accurately detected by using the light detection unit 32. And the timing of the cleaning operation can be determined more appropriately. In addition to the ultraviolet detector, a visible light detector can be used as compared with the second embodiment. In addition, since the detection unit can be provided outside the ultraviolet irradiation unit 4, ultraviolet irradiation within the ultraviolet irradiation unit 4 is not hindered.

Embodiment 4 FIG.
Next, the air conditioner 1 according to Embodiment 4 of the present invention will be described with reference to FIGS. FIG. 20 is a schematic configuration diagram illustrating an air conditioner 1 according to Embodiment 4 of the present invention. FIG. 21 is a schematic configuration diagram illustrating a state during the cleaning operation of the air passage cross-sectional area reduction unit 5 in the sterilization apparatus 100 included in the air conditioner 1 of FIG. 20. FIG. 22 is a schematic configuration diagram of the airway cross-sectional area reduction unit 5 shown in FIG. 21 as viewed from the airway side. FIG. 23 is a schematic configuration diagram showing a modification of the air conditioner 1 according to Embodiment 4 of the present invention. FIG. 24 is a schematic cross-sectional view showing a state during cleaning of the air passage cross-sectional area reduction unit 5 in the sterilizer 100 included in the air conditioner 1 of FIG. The air conditioner 1 according to the fourth embodiment is different from the air conditioner 1 according to the first embodiment in that the air passage cross-sectional area reduction unit 5 has a damper structure.

  As shown in FIG. 20, the air passage cross-sectional area reducing unit 5 according to the fourth embodiment includes a support portion 33 and a blade 34, and for example, a damper structure configured such that the blade 34 can be rotated around the support portion 33 by a motor. It has become. In FIG. 20, the support portion 33 is a cantilever damper disposed at the end of the blade 34. During the sterilization operation, the blade 34 is lifted as shown in FIG. 20, and the air passage 7 is not shielded.

  During the cleaning operation, the blade 34 rotates in the direction of the arrow 35a in FIG. Accordingly, as shown in FIGS. 21 and 22, the blade 34 shields a part of the air passage 7, and the cross-sectional area of the air passage 7 is reduced. As shown in FIG. 22, the blade 34 is circular and shields the central portion of the air passage 7, but a gap 36 exists between the air passage 7 and the wall surface. When the blower 2 is operated, an air flow flows through the gap 36. The airflow whose flow velocity is increased by passing through the gap 36 passes through the surface of the reflecting plate 22 at a high speed, so that dust or dirt on the reflecting plate 22 can be removed. The width of the gap 36 is set such that the area of the gap 36 is ¼ of the cross-sectional area of the tube 3a as described in the first embodiment, but the width needs to be constant. It can be set as appropriate.

<Effect in Embodiment 4>
As described above, according to the fourth embodiment, in addition to the function and effect of the first embodiment, the air passage cross-sectional area reduction unit 5 can have a simpler configuration with a smaller number of parts, and the manufacturing cost can be reduced. Alternatively, maintenance costs can be reduced.

  In the above description, the cantilever damper in which the support portion 33 is disposed at the end of the blade 34 has been described. However, as shown in FIGS. 23 and 24, the center support damper in which the support portion 33 is disposed at the center of the blade 34. It is good. However, as can be seen from FIGS. 23 and 24, in the case of the center support damper, if the blade 34 is installed so as not to interfere with the ultraviolet irradiation unit 4 during rotation, the distance between the blade 34 and the ultraviolet irradiation unit 4 during the cleaning operation is reduced. It becomes larger than the case of a cantilever damper. At the time of the cleaning operation, the closer the distance between the blade 34 and the gap 36 and the ultraviolet irradiation unit 4 is, the higher the cleaning efficiency of the reflection plate 22 by the air current is. Therefore, the cantilever damper is more preferable in terms of cleaning efficiency.

Embodiment 5. FIG.
Next, the air conditioner 1 according to Embodiment 5 of the present invention will be described with reference to FIG. FIG. 25 is a schematic configuration diagram of the sterilizer 100 provided in the air conditioner 1 according to Embodiment 5 of the present invention. FIG. 25 is an enlarged structural cross-sectional view of the air passage cross-sectional area reduction unit 5 and the ultraviolet irradiation unit 4 during the sterilization operation, in particular, in the air conditioner 1 of the fifth embodiment. FIG. 26 is a schematic configuration diagram illustrating a state during the cleaning operation of the air passage cross-sectional area reducing unit 5 in the sterilizer 100 included in the air conditioner 1 of FIG. In particular, FIG. 26 shows an enlarged view of the air passage cross-sectional area reduction unit 5 and the ultraviolet irradiation unit 4 during the cleaning operation. FIG. 27 is a schematic configuration diagram of the air passage cross-sectional area reduction unit 5 shown in FIG. 26 as viewed from the air passage 7 side. In particular, in FIG. 27, the air passage cross-sectional area reduction unit 5 and the ultraviolet irradiation unit 4 during the cleaning operation are shown as viewed from the air passage 7 side. The air conditioner 1 according to the fifth embodiment is different from the air conditioner 1 according to the first embodiment in that the air passage cross-sectional area reduction unit 5 has a folding shutter structure.

  As shown in FIG. 25, the air passage cross-sectional area reducing section 5 in the fifth embodiment has three L-shaped shutters 37, and the three shutters 37 are joined by springs 38a and 38b. . One shutter 37 is joined to a rope 39, and the rope 39 is connected to a hoisting device 40. During the sterilization operation, the springs 38a and 38b are compressed, the rope 39 is tensioned, and the three shutters 37 are folded out of the air path.

  During the cleaning operation, as shown in FIG. 26, when the hoisting device 40 is operated and the rope 39 is extended, the springs 38a and 38b are extended, and the three shutters 37 are slid to operate. Shield part. At this time, the springs 38a and 38b are in a free state in which neither compression nor tension occurs.

  As shown in FIG. 27, at the time of the cleaning operation, the central portion of the air passage 7 is closed by folding the three shutters 37, but there is a gap 41 between the shutter 37 and the wall surface of the air passage 7. . When the blower 2 is operated, an air flow flows through the gap 41. Since the airflow whose flow velocity is increased by passing through the gap 41 flows on the surface of the reflecting plate 22 at high speed, dust or dirt attached to the reflecting plate 22 can be removed. The width of the gap 41 is set so that the area of the gap 41 is ¼ of the cross-sectional area of the tube 3a as described in the first embodiment, but the width needs to be constant. It can be set as appropriate.

<Effect in Embodiment 5>
As described above, according to the fifth embodiment, in addition to the operational effects of the first embodiment, the air passage cross-sectional area reduction unit 5 can be configured with a simpler configuration with a small number of parts, and can be manufactured or manufactured. Maintenance costs can be reduced.

Embodiment 6 FIG.
Next, an air conditioner 1 according to Embodiment 6 of the present invention will be described with reference to FIG. FIG. 28 is a schematic configuration diagram showing an air conditioner 1 according to Embodiment 6 of the present invention. The air conditioner 1 of the sixth embodiment is different from the air conditioner 1 of the first embodiment in that a static eliminator 42 is installed on the reflector 22 of the ultraviolet irradiation unit 4 in the sterilizer 100. .

  As shown in FIG. 28, the air conditioner 1 according to the sixth embodiment includes a static eliminator 42 connected to the reflection plate 22 of the ultraviolet irradiation unit 4. In the cleaning operation, the static eliminator 42 is operated simultaneously with the start of cleaning, and the charged state of the reflecting plate 22 is eliminated, thereby removing the dust or dirt charged on the reflecting plate 22. The dust or dirt from which the charge has been removed can be easily blown away by the air current because the ion bond with the reflector 22 is lost.

<Effect in Embodiment 6>
As described above, according to the sixth embodiment, in addition to the function and effect of the first embodiment, it is easier to remove the dust or dirt adhering to the reflection plate 22 using the static eliminator 42. Dust or dirt can be removed.

Embodiment 7 FIG.
Next, the sterilizer 100 of the air conditioner 1 according to Embodiment 7 of the present invention will be described with reference to FIGS. 29 to 31. FIG. 29 is a structural sectional view showing a state during the sterilization operation of the sterilizer 100 in the air conditioner 1 according to Embodiment 7 of the present invention. FIG. 30 is a diagram illustrating a result of analyzing attached dirt in the sterilization apparatus 100 included in the air conditioner 1 of FIG. 29. FIG. 31 is a schematic configuration diagram showing a state during the sterilization operation of the sterilizer 100 in the air conditioner 1 of FIG. As shown in FIG. 29, compared with the air conditioner 1 of Embodiment 1, the air conditioner 1 of Embodiment 7 has a heater 43 as a heating means around the ultraviolet irradiation unit 4 in the sterilizer 100. Is different.

  Here, as described above, dirt adheres to the surface of the reflection plate 22, but the components and constituent elements of the dirt particles were analyzed by SEM / EDX (scanning electron microscope / energy dispersive X-ray spectroscopy). The results will be described with reference to FIG. As shown in FIG. 30, the dirt particles adhering to the surface of the reflecting plate 22 were mainly composed of C, O, Na, Mg, Al, Si, Cl, Ca, and Fe. Moreover, when the same particle | grains were analyzed by FT-IR (fast Fourier transform infrared spectroscopy), the peak which shows the functional group of organic substance was not seen. From this result, the adhered dirt particles are presumed to be mainly composed of inorganic sand dust or sea salt. Since dust or sea salt is hygroscopic, it is easy to absorb water. Since water intervenes between the dirt particles and the reflector 22 and plays a role of a strong binder due to hydrogen bonding, it can be seen that it is difficult to remove the dirt when water is present. Therefore, in the air conditioner 1 of the seventh embodiment, the ultraviolet irradiation unit 4 is heated by the heater 43 during the cleaning operation.

<Effect in Embodiment 7>
As described above, according to the seventh embodiment, the moisture adhering to or adsorbing to the dirt adhering to the surface of the reflecting plate 22 is volatilized, and the binder between the reflecting plate 22 is eliminated. Dust or dirt can be easily removed by airflow. Instead of installing the heater 43 around the ultraviolet irradiation unit 4, as shown in FIG. 31, for example, the heater 44 may be installed in the wind path 7 on the windward side.

  Further, in the air conditioner 1 of the seventh embodiment, during the cleaning operation, first, the ultraviolet irradiation unit 4 is heated by the heater 43 so that the air blower 2 does not blow the air into the housing 3. And evaporate the water faster. Thereafter, dust or dirt can be removed more efficiently by blowing air into the housing 3 by the blower 2.

Embodiment 8 FIG.
Next, the air conditioner 1 according to Embodiment 8 of the present invention will be described with reference to FIG. FIG. 32 is a schematic configuration diagram showing a state during the sterilization operation of the sterilizer 100 in the air conditioner 1 according to Embodiment 8 of the present invention. As shown in FIG. 32, the air conditioner 1 according to the eighth embodiment is a heating means or dehumidifier capable of heating or dehumidifying the air passage 7 as compared with the air conditioner 1 according to the first embodiment. The point which installed the heat pump heat exchanger 45 as a means differs. The heat pump heat exchanger 45 has a configuration in which a tube made of copper or the like is inserted into a comb-shaped aluminum material (not shown), and the surface can be heated or cooled by flowing a coolant through the tube.

<Effect in Embodiment 8>
As described above, in the air conditioner 1 according to the eighth embodiment, a high temperature refrigerant is caused to flow through the pipe of the heat pump heat exchanger 45 during the cleaning operation, so that the surface becomes high temperature and Air becomes hot. And in the said air conditioner 1, the water | moisture adhering or adsorb | sucked to the dirt adhering to the surface of the reflecting plate 22 volatilizes. As a result, in the air conditioner 1 according to the eighth embodiment, since there is no binder between the reflector 22 and the dust or dirt can be easily removed by the airflow.

  Moreover, in the air conditioner 1 of this Embodiment 8, the surface becomes low temperature by flowing a low-temperature refrigerant through the pipe of the heat pump heat exchanger 45 during the cleaning operation, and the moisture contained in the air from the air supply port 6 is reduced. Air that is removed by condensation and has a low relative humidity is supplied to the air passage 7. As a result, the moisture adhering to or adsorbing to the dirt adhered to the surface of the reflecting plate 22 is volatilized, and the binder between the reflecting plate 22 is removed, so that dust or dirt can be easily removed by the airflow. .

Embodiment 9 FIG.
Next, the air conditioner 1 according to Embodiment 9 of the present invention will be described with reference to FIG. FIG. 33 is a schematic configuration diagram showing a state during the sterilization operation of the sterilizer 100 in the air conditioner 1 according to Embodiment 9 of the present invention. As shown in FIG. 33, the air conditioner 1 of the ninth embodiment is provided with a heat conductor 46, which is a heat conducting means, instead of the heater 43, as compared with the air conditioner 1 of the seventh embodiment. However, it is different in that it is mounted on the ultraviolet light source 21. The heat conductor 46 is made of a metal such as copper or aluminum, but any type can be used as long as it has high heat conductivity.

  In the air conditioner 1 of the ninth embodiment, the ultraviolet light source 21 is turned on during the cleaning operation, and heat is transmitted to the heat conductor 46 by generating heat. And since the ultraviolet irradiation part 4 is heated with the heat | fever of the heat conductor 46, the water | moisture adhering or adsorb | sucked to the dirt adhering to the surface of the reflecting plate 22 volatilizes. As a result, in the air conditioner 1 according to the ninth embodiment, since the binder between the reflecting plate 22 and dirt is eliminated, dust or dirt can be easily removed by the airflow.

<Effect in Embodiment 9>
As described above, in the air conditioner 1 of the ninth embodiment, the heat conductor 46 is installed in the ultraviolet light source 21, and the ultraviolet light source 21 is turned on during the cleaning operation. Then, since the ultraviolet light source 21 generates heat, heat is transmitted to the heat conductor 46, and when the ultraviolet irradiation unit 4 is heated, the water adhering to or adsorbing on the dirt attached to the surface of the reflecting plate 22 is volatilized. As a result, in the air conditioner 1 according to the ninth embodiment, since there is no binder between the reflector 22 and the dust or dirt can be easily removed by the airflow.

  Further, in the air conditioner 1 of the ninth embodiment, the air blower 2 does not blow the air into the housing 3 during the cleaning operation. By heating the ultraviolet irradiation unit 4, moisture is evaporated at a higher speed. Thereafter, dust or dirt can be removed more efficiently by blowing air into the housing 3 by the blower 2.

Embodiment 10 FIG.
Next, the sterilizer 100 according to Embodiment 10 of the present invention will be described with reference to FIG. FIG. 34 is a schematic configuration diagram showing a state during the sterilization operation of the sterilization apparatus 100 according to Embodiment 10 of the present invention. The first embodiment relates to an air conditioner 1 including a sterilizer 100 that sterilizes or inactivates microorganisms in the air. The tenth embodiment focuses only on the sterilization apparatus 100 of the air conditioner 1 described above, and relates to the sterilization apparatus 100 that sterilizes or inactivates microorganisms floating in water instead of air. In FIG. 34, the difference from FIG. 1 is as follows. A water channel 49 is connected to an outlet of a pump 47 for feeding water through a water supply port 48. A drain port 50 is provided as an outlet of the water channel 49. A water channel cross-sectional area reducing unit 51 as a channel cross-sectional area reducing unit is provided in a part of the water channel 49, and the ultraviolet irradiation unit 4 is installed downstream thereof. Arrows 9 and 10 indicate the direction of water flow. The configuration of the ultraviolet irradiation unit 4 is the same as that shown in FIGS. 2, 3, 4, 5, and 6 in the first embodiment.

  The sterilization operation and the cleaning operation in the sterilization apparatus 100 of the tenth embodiment can be performed by simply replacing the air with water in the sterilization apparatus 100 of the air conditioner 1 in the first embodiment. The operation is the same as that of the sterilizer 100. In the sterilizer 100, air and water are both fluids. Therefore, the sterilizer 100 can be configured to sterilize bacteria in water or inactivate viruses. Due to the cleaning operation, the dirt adhering to the reflecting plate 22 is effectively removed by the high-speed water flow from the slit 15. However, since water has a higher viscosity than air, it is preferable to wash with water having a higher flow rate than that of Embodiment 1 at the time of cleaning, and as a guideline, the Reynolds number is 3000 or more, which is a boundary value of turbulent flow. It is desirable.

<Effect in Embodiment 10>
As described above, the sterilization apparatus 100 according to the tenth embodiment includes the water channel cross-sectional area reducing unit 51 disposed between the water supply port 48 and the ultraviolet irradiation unit 4, and the water channel cross-sectional area reducing unit 51 includes: It has a function of shielding a part of the air passage 7 and reducing the cross-sectional area of the water passage 49. Thereby, it is possible to easily remove the dirt attached to the reflecting plate 22 using the water flow without disassembling the apparatus. Then, by removing the dirt adhering to the reflection plate 22, the ultraviolet ray reflectance of the reflection plate 22 recovers from the lowered state, and the ultraviolet irradiation amount inside the ultraviolet irradiation unit 4 returns to its original state. A decrease in sterilization efficiency can be suppressed. Further, by removing the dirt on the reflection plate 22, scattering of ultraviolet rays is suppressed, and leakage of ultraviolet rays to the outside of the ultraviolet irradiation unit 4 is suppressed. As a result, deterioration of the member of the housing 3 can be prevented.

  In addition, by adopting a timer control that repeatedly performs a sterilization operation for a certain period and a cleaning operation for a certain period as a set, dirt adhering to the reflection plate 22 can be automatically removed periodically, and the ultraviolet irradiation unit 4 can be easily removed. It becomes possible to maintain the bactericidal effect.

  While the present invention has been described based on the embodiments, the present invention is not limited to this. Within the scope of the invention, the embodiments or their modifications can be freely combined, and the embodiments can be appropriately modified or omitted.

  DESCRIPTION OF SYMBOLS 1 Air conditioner, 2 ventilation apparatus, 3 housing | casing, 3a, 3b pipe | tube, 4 ultraviolet irradiation part, 5 air path cross-sectional area reduction | decrease part, 6 air supply port, 7 air path, 8 exhaust port, 10c ultraviolet irradiation part, 10d Ultraviolet irradiation unit, 11 housing, 11a opening, 12 ring, 13 cam, 14 blade, 15 slit, 16 axes, 17 spring, 18 rotation direction, 21 ultraviolet light source, 22, 22A, 22B, 22C, 22D, 22E, 22F, 22G, 22H, 22I, 22J, 22K Reflector, 23 Tubular housing, 24 Inlet, 25 Outlet, 26 Broken line arrow, 27 Flat member, 27a Flat surface, 28 Reflective member, 28a Reflective surface, 30 Wall surface, 31 UV detection part, 32 Light detection part, 33 Support part, 34 Blade, 36 Crevice, 37 Shutter, 38a, 38b Spring, 39 Rope, 40 Hoisting device, 41 Clearance, 42 Static eliminator, 43, 44 Heater, 45 Heat pump heat exchanger, 46 Heat conductor, 47 Pump, 48 Water supply port, 49 Water channel, 50 Drain port, 51 Water channel cross-sectional area reduction part, 71 Incident Light, 72 reflected light, 73 normal, 100 sterilizer, Ap average pitch, Da traveling direction, E energy, a luminous flux reflection point, aem angle, d thickness, e luminous flux reflection point, ema angle, f, j luminous flux reflection point , Jme angle, m center, mae, mas, mea, mej angle, s luminous flux generation point, sam, sma angle, α tilt angle, λ wavelength.

Claims (9)

A supply port that supplies the air or water taken in, and a discharge port that discharges the air or water supplied from the supply port, and is installed between the supply port and the discharge port. A channel body in which a channel through which water passes is formed;
It is installed between the supply port and the discharge port, has an ultraviolet light source, and a reflection part that reflects the ultraviolet light emitted from the ultraviolet light source, and irradiates the air or water flowing through the flow path with ultraviolet light. An ultraviolet irradiation unit for sterilization,
A flow path cross-sectional area reduction part installed between the reflection part and the supply port,
The flow path cross-sectional area reduction unit includes an openable / closable shield that shields a part of the flow path to reduce the cross-sectional area of the flow path, and the reflection is caused by the flow that has passed through the flow path cross-sectional area reduction part. Remove any dust or dirt on the parts,
Sterilizer. The channel cross-sectional area reduction part shields at least the peripheral part of the channel.
The sterilizer according to claim 1. The shield is a plurality of blades formed with slits,
The flow path cross-sectional area reduction portion shields the flow path except for the slits by the plurality of blades.
The sterilizer according to claim 1 or 2. A first detection unit for detecting the intensity of ultraviolet rays inside the ultraviolet irradiation unit;
The sterilizer as described in any one of Claims 1-3. A second detection unit that detects the intensity of ultraviolet or visible light upstream or downstream of the ultraviolet irradiation unit;
The sterilizer as described in any one of Claims 1-4. A static eliminator connected to the reflective portion to remove the charging of the reflective portion;
The sterilizer as described in any one of Claims 1-5. Provided on the upstream side of the reflection part or the reflection part, a heating means for heating the ultraviolet irradiation part or the inside of the flow path or a dehumidification means for dehumidifying the inside of the flow path,
The sterilizer as described in any one of Claims 1-6. Provided with a heat conduction means attached to the ultraviolet irradiation unit,
The sterilizer as described in any one of Claims 1-7. An air conditioner that performs air conditioning on captured air,
Comprising the sterilizer according to any one of claims 1 to 8,
The supply port as an air supply port for supplying the taken-in air,
The exhaust port as an exhaust port for discharging the air supplied from the air supply port,
The flow path body is installed between the air supply port and the exhaust port, and an air path body in which an air path through which the air passes is formed,
A flow path cross-sectional area reduction part is provided as an air path cross-sectional area reduction part installed between the reflection part and the air supply port.
Air conditioner.

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