Sterilization device

Abstract

To provide a sterilizer capable of irradiating a broad area of an irradiation target face with ultraviolet light even when a light-emitting element to emit ultraviolet light is arranged at a near position to the irradiation target face.SOLUTION: A sterilizer includes: a light-emitting apparatus equipped with a light-emitting element for emitting ultraviolet light and a beam control member for condensing the ultraviolet light emitted from the light-emitting element; and an irradiation target face to be irradiated with the ultraviolet light emitted from the light-emitting apparatus. An optical axis of the light-emitting apparatus tilts to the irradiation target face.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sterilizer. [Background technology]

[0002] It is widely known that ultraviolet light is used to sterilize fluids such as liquids and gases, various medical instruments, etc. In recent years, ultraviolet light has also been used to sterilize parts that come into contact with water droplets such as condensation (see, for example, Patent Document 1).

[0003] Patent Document 1 describes an air conditioner with a sterilization function. The air conditioner described in Patent Document 1 has an intake grille, a heat exchanger, a drain pan, a fan, and an outlet grille. The outlet grille is provided with a photocatalytic filter equipped with a fluorescent tube-type ultraviolet lamp.

[0004] In the air conditioner described in Patent Document 1, a fan draws in indoor air through an intake grille. The temperature of the drawn-in air is lowered in a heat exchanger. The cooled air is then blown out into the room through an outlet grille by the fan. The air blown out from the outlet grille is sterilized by passing through a photocatalytic filter equipped with an ultraviolet lamp. Meanwhile, water droplets formed by condensation on the surface of the heat exchanger are collected in a drain pan and discharged outside the room. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-153728 Summary of the Invention [Problem to be solved by the invention]

[0006] One possible solution is to sterilize the drain pan using a fluorescent-type ultraviolet lamp attached to a photocatalytic filter. However, the ultraviolet lamp has a short usable life, so it must be replaced frequently, increasing the running costs of the air conditioner. Furthermore, because the drain pan is typically located in a limited space inside the air conditioner that is not visible from the outside, replacing the ultraviolet lamp can be cumbersome.

[0007] One possible solution is to use light-emitting diodes (LEDs) that emit ultraviolet light instead of ultraviolet lamps. In this case, it is conceivable to arrange the LEDs in a line directly above the drain pan along the drain pan, but this would require many LEDs, which would make the device expensive. On the other hand, because the drain pan is placed in a narrow space, it is not possible to increase the distance between the LEDs and the drain pan in order to reduce the number of LEDs.

[0008] An object of the present invention is to provide a sterilization device that can irradiate a wide area of ​​an irradiated surface with ultraviolet rays even when a light emitting element that emits ultraviolet rays is located close to the irradiated surface. [Means for solving the problem]

[0009] The sterilization device of the present invention comprises: A sterilization device disposed inside an indoor unit of an air conditioner or a dehumidifier, a light emitting device including a light emitting element that emits ultraviolet light and a light flux controlling member that condenses the ultraviolet light emitted from the light emitting element; A surface of the indoor unit of the air conditioner or the drain pan of the dehumidifier that comes into contact with liquid, an irradiation surface onto which ultraviolet light emitted from the light-emitting device is irradiated, the irradiated surface is a surface having a longitudinal direction and a lateral direction when viewed in a plan view, The light emitting device Place , The optical axis of the light emitting element is inclined relative to the irradiated surface and when the irradiated surface is viewed in plan, an angle formed between a first straight line along the longitudinal direction and an optical axis of the light emitting device is smaller than an angle formed between a second straight line along the lateral direction and an optical axis of the light emitting device. . [Effects of the Invention]

[0010] The sterilization device of the present invention can irradiate the entire irradiated surface with ultraviolet rays even when the light-emitting element that emits ultraviolet rays is positioned directly above and close to the irradiated surface. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a partial configuration of a sterilizer according to a first embodiment of the present invention. [Figure 2] 2A to 2D are diagrams showing the configuration of a light flux controlling member. [Figure 3] FIG. 3 is a diagram illustrating the light blocking member and the reflecting member. [Figure 4] 4A to 4D are diagrams for explaining the state of ultraviolet irradiation in the sterilization device. [Figure 5] 5A to 5D are diagrams for explaining the state of ultraviolet irradiation in another sterilization device. [Figure 6] 6A to 6C are schematic diagrams showing other arrangements of light emitting devices. [Figure 7] 7A to 7C are schematic diagrams showing other arrangements of light emitting devices. [Figure 8] 8A to 8C are schematic diagrams showing other arrangements of light emitting devices. [Figure 9] 9A to 9D are diagrams illustrating the configuration of a light flux controlling member in a modification of the first embodiment. [Figure 10] FIG. 10 is a perspective view showing a partial configuration of a sterilizer according to the second embodiment of the present invention. [Figure 11] FIG. 11A is a diagram showing the configuration of a portion of a sterilizer according to embodiment 3 of the present invention, and FIG. 11B is a diagram showing the configuration of a portion of a sterilizer according to a modified example of embodiment 3. [Figure 12] FIG. 12A is a diagram showing the configuration of a portion of a sterilizer according to embodiment 4 of the present invention, and FIG. 12B is a diagram showing the configuration of a portion of a sterilizer according to a modified example of embodiment 4. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0013] [Embodiment 1] (Configuration of sterilization device) The sterilization device is a device that sterilizes an irradiated surface by irradiating the irradiated surface with ultraviolet light. The sterilization device is effective against all types of bacteria and can sterilize at room temperature, so it can be incorporated into various devices. In this embodiment, a sterilization device incorporated into an indoor unit (electrical equipment) of an air conditioner (hereinafter also referred to as "air conditioner") will be described, but the sterilization device of the present invention is not limited to this.

[0014] FIG. 1 is a perspective view showing a partial configuration of a sterilizer according to a first embodiment of the present invention, which is incorporated into an indoor unit 100 of an air conditioner.

[0015] As shown in Fig. 1, the indoor unit 100 of the air conditioner has an intake section, a heat exchanger 110, a fan 120, a sterilizer 130 having a drain pan 135, a filter 170 (see Fig. 3), and an outlet section. In Fig. 1, the intake section, filter 170, and outlet section are omitted, and only a part of the internal structure of the indoor unit 100 of the air conditioner is shown.

[0016] The intake section functions to take in indoor air into the indoor unit 100. The arrangement and shape of the intake section are not particularly limited as long as they can perform the above-mentioned function, and can be designed as appropriate. The outlet section functions to blow air from inside the indoor unit 100 into the room. The arrangement and shape of the outlet section are not particularly limited as long as they can perform the above-mentioned function, and can be designed as appropriate. The filter 170 captures foreign matter in the air taken into the indoor unit 100. A known filter 170 can be used as the filter 170.

[0017] The heat exchanger 110 cools warm air when the air conditioner is in cooling mode, and warms cold air when it is in heating mode. In this embodiment, the heat exchanger 110 is disposed directly above the sterilizer 130. The heat exchanger 110 is not particularly limited as long as it can perform the above-mentioned function, and any known heat exchanger can be used. When the air conditioner is in cooling mode, the heat exchanger 110 cools warm air, causing condensation on the surface of the heat exchanger 110. This condensation causes water droplets to adhere to the surface of the heat exchanger 110. The water droplets adhering to the surface of the heat exchanger 110 fall into a drain pan 135 (included in the sterilizer 130, which will be described later) and are discharged outside the room.

[0018] The fan 120 functions to take indoor air into the indoor unit 100 and to exhaust the air inside the indoor unit 100 to the outside of the indoor unit 100. The configuration of the fan 120 is not particularly limited as long as it can perform the above-mentioned functions, and any known fan can be used.

[0019] It is preferable that the sterilizer 130 is surrounded by a member that is opaque to the ultraviolet rays emitted from the light-emitting element 133. In this embodiment, the sterilizer 130 is placed inside the indoor unit 100 of the air conditioner, and therefore the "member that is opaque to ultraviolet rays" is the cover of the indoor unit 100. Note that the sterilizer 130 only needs to be surrounded to the extent that ultraviolet rays do not leak to the outside, and the entire sterilizer 130 does not need to be completely covered.

[0020] The sterilization device 130 has an irradiated surface 131 and a light emitting device 132 .

[0021] The irradiated surface 131 is irradiated with ultraviolet light by the light emitting device 132. The size of the irradiated surface 131 is not particularly limited and may be set as appropriate. The shape of the irradiated surface 131 is also not particularly limited. In this embodiment, the irradiated surface 131 is part of a functional part of the indoor unit 100. In this embodiment, the functional part is the drain pan 135. That is, the irradiated surface 131 is the surface of the drain pan 135 that comes into contact with water droplets. That is, the irradiated surface 131 is the inner surface (bottom surface) of the drain pan 135. The shape of the drain pan 135 is not particularly limited. In this embodiment, the shape of the drain pan 135 is a box shape with an open top. The irradiated surface 131 may be flat, or may have a convex portion formed thereon. In this embodiment, the irradiated surface 131 is flat. Furthermore, in this embodiment, the irradiated surface 131 is rectangular when viewed from above, Has a longitudinal direction and a lateral direction .

[0022] The light emitting device 132 is disposed at a predetermined height from the irradiated surface 131 (the inner surface of the drain pan 135), and irradiates the irradiated surface 131 with ultraviolet light. The number of light emitting devices 132 is not particularly limited. The number of light emitting devices 132 may be one or more. In this embodiment, the number of light emitting devices 132 is two. In this embodiment, the two light emitting devices 132 are disposed at a predetermined height from the irradiated surface 131. Long Specifically, one of the two light emitting devices 132 is arranged in one direction ( Long The other of the two light emitting devices 132 is disposed directly above one end of the irradiated surface 131 in one direction ( Long The light emitting device 132 is disposed directly above the other end in the direction of the light source 131. The lower end of the light emitting device 132 is located directly above the short side of the irradiated surface 131, and is disposed at an angle so that the ultraviolet light emitted from the light emitting device 132 is directed into the irradiated surface 131. The two light emitting devices 132 are disposed such that their optical axes OA, OA are aligned with the normal and A first straight line along the longitudinal direction of the irradiated surface 131The light emitting devices 132 are arranged so as to be positioned on the same imaginary plane including the light emitting device 132. The height of each light emitting device 132 from the irradiated surface 131 is set appropriately. Here, the "optical axis OA of the light emitting device 132" refers to the ray that exhibits the maximum luminous intensity in the luminous flux of ultraviolet light irradiated from the light emitting device 132.

[0023] Each light-emitting device 132 is arranged such that the optical axis OA of the light-emitting element 133 intersects obliquely with the irradiated surface 131. In this embodiment, the optical axes OA of the two light-emitting devices 132 intersect. The smaller of the angles formed between the optical axis OA of the light-emitting device 132 and the irradiated surface 131 is not particularly limited as long as it is greater than 0° and less than 90°. In this embodiment, the smaller of the angles formed between the optical axis OA of the light-emitting device 132 and the irradiated surface 131 is 10°.

[0024] Light emitting device 132 has light emitting element 133 and light flux controlling member 134. In the present embodiment, light emitting device 132 is fixed to a holder (not shown).

[0025] Light-emitting element 133 emits ultraviolet light. The type of light-emitting element 133 is not particularly limited as long as it can emit ultraviolet light. Examples of light-emitting element 133 include light-emitting diodes (LEDs), mercury lamps, metal halide lamps, xenon lamps, and laser diodes (LDs). The central wavelength or peak wavelength of the ultraviolet light emitted from light-emitting element 133 is preferably 200 nm or more and 350 nm or less. From the viewpoint of high sterilization efficiency, the central wavelength or peak wavelength of the ultraviolet light emitted from light-emitting element 133 is more preferably 250 nm or more and 290 nm or less. In other words, ultraviolet C rays (UVC) are more preferred as the ultraviolet light.

[0026] Light flux controlling member 134 is a member that controls the distribution of ultraviolet light emitted from light emitting element 133. In the present embodiment, light flux controlling member 134 mainly controls the distribution of ultraviolet light emitted from light emitting element 133 and incident on the irradiated surface. 131 of Second straight line along the short sideLight flux controlling member 134 is arranged such that central axis CA of light flux controlling member 134 coincides with optical axis OA of light emitting element 133. The configuration of light flux controlling member 134 will be described in detail below.

[0027] (Configuration of Light Flux Control Member) Figures 2A to 2D are diagrams showing the configuration of light flux controlling member 134 in sterilization device 130 according to Embodiment 1. Figure 2A is a plan view of light flux controlling member 134, Figure 2B is a bottom view, Figure 2C is a left side view, and Figure 2D is a cross-sectional view taken along line AA shown in Figure 2A.

[0028] 2A to 2D, light flux controlling member 134 has incident region 141 and exit region 142. In the present embodiment, light flux controlling member 134 also has tube portion 143, flange portion 144, and positioning protrusion 145.

[0029] Incident region 141 is disposed opposite light emitting element 133 and allows ultraviolet light emitted from light emitting element 133 to enter incident region 141. Incident region 141 includes first control unit 146 and second control unit 147. When incident region 141 is viewed from above (bottom), first control unit 146 is disposed on one side of incident region 141 (upper side in FIGS. 2B and 2D ) with a virtual plane including central axis CA of light flux controlling member 134, which coincides with optical axis OA of light emitting element 133, as a boundary. When incident region 141 is viewed from above (bottom), second control unit 147 is disposed on the other side of incident region 141 (lower side in FIGS. 2B and 2D ) with a virtual plane including central axis CA as a boundary. In sterilization device 130, light emitting device 132 is disposed such that second control unit 147 is located closer to irradiated surface 131 than first control unit 146.

[0030] The first control section 146 has a first refraction entrance surface 151 and a first convex section 152 .

[0031] The first refraction incident surface 151 is disposed on the central axis CA side (inside) of the first control unit 146. The first refraction incident surface 151 refracts and causes ultraviolet light emitted from the light emitting element 133 to enter the first refraction incident surface 151 so that the angle with respect to the central axis CA becomes smaller. In a cross section including the central axis CA, the first refraction incident surface 151 is formed so as to move toward the emission region 142 as it moves away from the central axis CA. In this embodiment, the shape of the first refraction incident surface 151 in a planar view is a sector shape with a central angle of 180°.

[0032] The first convex portion 152 is disposed farther from the central axis CA than the first refraction incident surface 151. The first convex portion 152 controls the ultraviolet light emitted from the light emitting element 133 toward the emission region 142 so that the angle with respect to the central axis CA is small in a cross section including the central axis CA. The number of first convex portions 152 is not particularly limited. In the present embodiment, there are three first convex portions 152. The sizes of the three first convex portions 152 may all be the same or may be different. In the present embodiment, the first convex portion 152 farthest from the central axis CA among the three first convex portions 152 is larger than the other first convex portions 152. In the present embodiment, the shape of the first convex portion 152 in a planar view is the shape of a part of a circle (semicircular ring). The three first convex portions 152 are disposed so that their first ridge lines 155 are positioned on concentric circles.

[0033] First convex portion 152 has first incident surface 153 on the central axis CA side (inner side), first reflecting surface 154 arranged at a position (outer side) away from first incident surface 153 with respect to central axis CA, and first ridge line 155 which is a connecting line between first incident surface 153 and first reflecting surface 154. Of the ultraviolet rays emitted from light emitting element 133, some ultraviolet rays are incident on first incident surface 153, reflected by first reflecting surface 154, and then emitted from emission region 142.

[0034] The second control unit 147 has a second refraction entrance surface 161 (refraction entrance surface) and a second convex portion 162.

[0035] The second refraction incident surface 161 is disposed on the central axis CA side (inside) of the second control unit 147. The second refraction incident surface 161 refracts and causes ultraviolet light emitted from the light emitting element 133 to enter the second refraction incident surface 161 so that the angle with respect to the central axis CA becomes small. In a cross section including the central axis CA, the second refraction incident surface 161 is formed so as to be convex toward the emission region 142. In this embodiment, the shape of the second refraction incident surface 161 in a plan view is a sector shape with a central angle of 180°.

[0036] The second convex portion 162 is disposed farther away from the central axis CA than the second refraction incident surface 161. The second convex portion 162 controls the ultraviolet light emitted from the light emitting element 133 toward the emission region 142 so that the angle with respect to the central axis CA is small in a cross section including the central axis CA. The number of second convex portions 162 is not particularly limited. In the present embodiment, there is one second convex portion 162. The second convex portion 162 has a notch portion 163.

[0037] Second convex portion 162 has second incident surface 164 on the central axis CA side (inner side), second reflecting surface 165 arranged at a position (outer side) away from second incident surface 164 with respect to central axis CA, and second ridge line 166 which is a connecting line between second incident surface 164 and second reflecting surface 165. In the present embodiment, the shape of second convex portion 162 in a planar view is the shape of a part of a circle (semicircular ring excluding cutout portion 163). Some of the ultraviolet rays emitted from light emitting element 133 are incident on second incident surface 164, reflected by second reflecting surface 165, and then emitted from emission region 142.

[0038] The cutout portion 163 is formed in the second convex portion 162 so as to divide the second convex portion 162 in half. The cutout portion 163 is a region where the second convex portion 162 is not formed, and is formed to guide light directly below the light-emitting device 132. In the present embodiment, a surface parallel to the central axis CA is formed in this region located outside the second refraction incidence surface 161. The position of the cutout portion 163 is not particularly limited as long as it can guide light directly below the light-emitting device 132. In the present embodiment, the cutout portion 163 is formed at a position away from the first control unit 146. More specifically, the cutout portion 163 is formed at a position closest to the irradiated surface 131 when the light-emitting device 132 is incorporated into the sterilization device 130. The width of the cutout portion 163 is not particularly limited. The width of the cutout portion 163 is set appropriately depending on the width of the irradiated surface 131, etc.

[0039] The tube portion 143 is disposed so as to surround the incident region 141 and the emission region 142. The shape of the tube portion 143 is not particularly limited. In the present embodiment, the shape of the tube portion 143 is cylindrical. A flange portion 144 is connected to the base end of the light emitting element 133 of the tube portion 143.

[0040] The flange portion 144 is connected to the end (base end) of the tubular portion 143 on the light emitting element 133 side. The flange portion 144 extends radially outward from the outer circumferential surface of the tubular portion 143. The shape of the flange portion 144 is not particularly limited. In the present embodiment, the flange portion 144 has an annular shape.

[0041] The positioning protrusions 145 are arranged to protrude from the surface (back surface) of the flange portion 144 facing the light emitting element 133. The number of positioning protrusions 145 is not particularly limited. In the present embodiment, the number of positioning protrusions 145 is three. The three positioning protrusions 145 are arranged at equal intervals in the circumferential direction of the flange portion 144. The three positioning protrusions 145 are used for positioning in the holder.

[0042] Light flux controlling member 134 is formed by, for example, integral molding. The material of light flux controlling member 134 is appropriately selected from light-transmitting materials that transmit light of a desired wavelength. Materials for light flux controlling member 134 include light-transmitting resins such as polymethyl methacrylate (PMMA), polycarbonate (PC), epoxy resin (EP), and silicone resin, as well as glass such as synthetic quartz.

[0043] Light-emitting device 132 having such light flux controlling member 134 arbitrarily adjusts the distribution of ultraviolet light by its arrangement relative to irradiated surface 131. When sterilization device 130 is viewed from above, the optical axis OA of light-emitting device 132 is aligned with the axis of irradiated surface 131. First straight line along the longitudinal direction Or, place it so that it is parallel to Second straight line along the short side The light distribution characteristics of light flux controlling member 134 are adjusted depending on whether light emitting device 132 is arranged so that optical axis OA is parallel to irradiated surface 131 in a plan view. First straight line along the longitudinal direction When light emitting device 132 is disposed so as to be parallel to Second straight line along the short side (the left and right directions when the light emitting device 132 is looking at the irradiated surface 131). That is, the direction including the optical axis OA of the light emitting device 132, and Second straight line along the short side In a virtual plane parallel to the plane of the light emitting element 133, ultraviolet light emitted from the light emitting element 133 is condensed by the light flux controlling member 134. In addition, when viewed in a plan view, the optical axis OA of the light emitting device 132 is aligned with the plane of the light emitting element 133. Second straight line along the short side When light emitting device 132 is disposed so as to be parallel to Second straight line along the short side (the up-down (front-rear) direction when the light emitting device 132 is looking at the irradiated surface 131) (see FIGS. 7A to 7C). That is, the direction including the optical axis OA of the light emitting device 132, and Second straight line along the short side In an imaginary plane parallel to the plane 131, ultraviolet light emitted from light emitting element 133 is condensed by light flux controlling member 134.

[0044] The air conditioner indoor unit 100 (sterilizer 130) may further include a light blocking member 171 or a reflecting member 172. FIG.

[0045] 3, the air conditioner indoor unit 100 (sterilization device 130) may further include a light-blocking member 171. The light-blocking member blocks ultraviolet light emitted from the light-emitting device 132 in directions other than the irradiated surface 131. In this embodiment, the light-blocking member 171 is disposed between the light-emitting device 132 and the filter 170.

[0046] As shown in FIG. 3, the air conditioner indoor unit 100 (sterilization device 130) may also have a reflecting member 172. The reflecting member 172 reflects ultraviolet light emitted from the light-emitting device 132 in a direction other than the irradiated surface 131 toward the irradiated surface. The location and size of the reflecting member 172 are not particularly limited as long as it can perform the above-mentioned function. In this embodiment, the reflecting member 172 is located between the light-emitting device 132 and the filter 170. The reflecting member 172 may also be located on the inner surface of the drain pan 135.

[0047] By disposing a light-blocking member 171 or a reflecting member 172 between the light-emitting device 132 and the filter 170, it is possible to block ultraviolet light emitted from the light-emitting device 132 and directed toward the filter 170, thereby preventing deterioration of the filter 170. Furthermore, by disposing the reflecting member 172 on the inner surface of the drain pan 135, the amount of ultraviolet light incident on the bottom surface (irradiated surface 131) of the drain pan 135 increases, thereby improving sterilization efficiency. Furthermore, the drain pan may be made of a material that reflects ultraviolet light, or the inner surface of the drain pan may be treated to reflect ultraviolet light. If the drain pan is made of a material that reflects ultraviolet light, it is not necessary to dispose the reflecting member 172 on the inner surface of the drain pan 135.

[0048] (Light-emitting device placement and UV irradiation range) The sterilization apparatus 130 according to this embodiment uniformly irradiates the entire irradiated surface 131 with ultraviolet light using a plurality of light-emitting devices 132. The arrangement of the light-emitting devices 132 relative to the irradiated surface and the irradiation range of ultraviolet light by the light-emitting devices 132 will be described below.

[0049] Figures 4A to 4D are diagrams illustrating ultraviolet irradiation in sterilization device 130. Figure 4A is a front view showing a schematic diagram of sterilization device 130, Figure 4B is a diagram showing the illuminance on irradiated surface 131 when ultraviolet light is irradiated toward the irradiated surface from only one light-emitting device 132B, Figure 4C is a diagram showing the illuminance on irradiated surface 131 when ultraviolet light is irradiated toward the irradiated surface 131 from two light-emitting devices 132A and 132B, and Figure 4D is a graph in which the results of Figures 4B and 4C are numerically plotted.

[0050] Here, the surface to be illuminated 131 Long Light emitting devices 132 are respectively arranged directly above both ends in the direction, and are arranged so that the optical axis OA of the light emitting devices 132 intersects with the irradiated surface 131. One light emitting device 132 shown on the left side of FIG. 4A is referred to as light emitting device 132A, and the other light emitting device 132 shown on the right side of FIG. 4A is referred to as light emitting device 132B. The scales in FIGS. 4B and 4C indicate the distance (mm) from the center of the irradiated surface 131. In FIGS. 4B and 4C, black areas indicate areas with low illuminance, and white areas indicate areas with high illuminance. The horizontal axis of FIG. 4D indicates the distance (mm) from the center of the irradiated surface 131, and the vertical axis indicates the illuminance (W / mm 2 ) is shown.

[0051] As shown in FIG. 4A, in the sterilization device 130 according to this embodiment, the irradiated surface 131 Long The light emitting device 132A and the light emitting device 132B are disposed directly above both ends of the light emitting device 132A and the light emitting device 132B, respectively, so that their optical axes OA intersect with the surface 131 to be illuminated.

[0052] 4B and 4D, of the two light-emitting devices 132A and 132B, one light-emitting device 132B irradiates ultraviolet rays onto a region between one end (on the light-emitting device 132B side) of the irradiated surface 131 and approximately the center of the irradiated surface 131. As shown in Fig. 4C and 4D, the other light-emitting device 132A of the two light-emitting devices 132A and 132B irradiates ultraviolet rays onto a region between the other end (on the light-emitting device 132A side) of the irradiated surface 131 and approximately the center of the irradiated surface 131.

[0053] In the sterilization device 130 according to this embodiment, the light emitting device 132B illuminates the area on the light emitting device 132B side that is not irradiated with ultraviolet light by the light emitting device 132A, and the light emitting device 132A illuminates the area on the light emitting device 132A side that is not irradiated with ultraviolet light by the light emitting device 132B. In this way, one light emitting device 132 irradiates the irradiated surface closer to the light emitting device 132 with ultraviolet light, and also irradiates the irradiated surface 131 with ultraviolet light. The second straight line along the short side The illuminating light source is adjusted to focus ultraviolet light in a direction.

[0054] Figures 5A to 5D are diagrams illustrating ultraviolet irradiation in another sterilization device 130. Figure 5A is a side view showing a schematic diagram of sterilization device 130, Figure 5B is a diagram showing the illuminance on irradiated surface 131 when ultraviolet light is irradiated toward irradiated surface 131 from only one light-emitting device 132B, Figure 5C is a diagram showing the illuminance on irradiated surface 131 when ultraviolet light is irradiated toward irradiated surface 131 from two light-emitting devices 132A and 132B, and Figure 5D is a graph in which the results of Figures 5B and 5C are numerically plotted.

[0055] Here, the surface to be illuminated 131 LongLight emitting devices 132 are disposed directly above both ends of the light emitting device 131 in the direction of illumination, and the light emitting devices 132 are disposed so that their optical axes OA (here, a straight line passing through the center of the light emitting device 132 and the central axis of the light emitting element 133) intersect with the illuminated surface 131. One light emitting device 132 shown on the left side of FIG. 5A is referred to as light emitting device 132A, and the other light emitting device 132 shown on the right side of FIG. 5A is referred to as light emitting device 132B. The scales in FIGS. 5B and 5C indicate the distance (mm) from the center of the illuminated surface 131. In FIGS. 5B and 5C, black areas indicate areas with low illumination intensity, and white areas indicate areas with high illumination intensity. The horizontal axis of FIG. 5D indicates the distance (mm) from the center of the illuminated surface 131, and the vertical axis indicates the illuminance (W / mm 2 ) is shown.

[0056] As shown in FIG. 5A, in the sterilization device 130 according to this embodiment, the irradiated surface 131 Long The light emitting device 132A and the light emitting device 132B are disposed directly above both ends of the light emitting device 132A and the light emitting device 132B, respectively, so that their optical axes OA intersect with the surface 131 to be illuminated.

[0057] 5B and 5D, of the two light-emitting devices 132A and 132B, one light-emitting device 132B irradiates ultraviolet rays onto a region between the other end (on the light-emitting device 132A side) of the irradiated surface 131 and approximately the center of the irradiated surface 131. As shown in Fig. 5C and 5D, of the two light-emitting devices 132A and 132B, the other light-emitting device 132A irradiates ultraviolet rays onto a region between one end (on the light-emitting device 132B side) of the irradiated surface 131 and approximately the center of the irradiated surface 131.

[0058] In the sterilization device 130 according to this embodiment, the light emitting device 132B illuminates the area on the light emitting device 132A side that is not irradiated with ultraviolet light by the light emitting device 132A, and the light emitting device 132A illuminates the area on the light emitting device 132B side that is not irradiated with ultraviolet light by the light emitting device 132B. In this way, one light emitting device 132 irradiates ultraviolet light onto the irradiated surface farther from the light emitting device 132, and also irradiates ultraviolet light onto the irradiated surface 131. Direction of the second straight line along the short side5A to 5D, in particular, light emitting device 132A (light emitting device 132B) does not need to irradiate ultraviolet light directly below light emitting device 132A, which increases the degree of freedom in arranging light emitting device 132A (light emitting device 132B).

[0059] The arrangement of the light emitting device 132 is not limited to the arrangement described above. Figures 6A to 6C are schematic diagrams showing other arrangements of the light emitting device 132. Reference numeral "180" in Figures 6A to 6C denotes a storage section in which a power supply and various sensors are stored.

[0060] 6A, when the storage unit 180 is disposed directly above one end of the drain pan 135, the light-emitting device 132A may be disposed directly above the other end of the drain pan 135, and the light-emitting device 132B may be disposed directly above the center of the drain pan 135. Even in this case, the optical axes OA of the light-emitting devices 132A and 132B are both inclined with respect to the irradiated surface. In this case, the light-emitting device 132A irradiates the region from one end of the drain pan 135 to near the center, and the light-emitting device 132B irradiates the region from the center to the other end of the drain pan 135. In this way, even when the light-emitting device 132A (light-emitting device 132B) cannot be disposed at one end of the drain pan 135, the entire irradiated surface 131 can be irradiated with ultraviolet light.

[0061] 6B, when storage units 180 are disposed directly above both ends of drain pan 135, light-emitting devices 132A and 132B may be disposed directly above the center of drain pan 135. Even in this case, the optical axes OA of light-emitting devices 132A and 132B are both inclined with respect to irradiated surface 131. In this case, light-emitting device 132A irradiates an area from the center to one end of drain pan 135 with ultraviolet light, and light-emitting device 132B irradiates an area from the center to the other end of drain pan 135 with ultraviolet light. In this way, even when light-emitting devices 132A (light-emitting devices 132B) cannot be disposed at both ends of drain pan 135, ultraviolet light can be irradiated onto the entire irradiated surface 131.

[0062] As shown in FIG. 6C , if storage sections 180 are disposed directly above both ends of drain pan 135 and protrusions 190 for avoiding wiring and the like are formed within drain pan 135, light-emitting devices 132A and 132B may both be disposed directly above protrusions 190. Even in this case, the optical axes OA of light-emitting devices 132A and 132B are both inclined with respect to the irradiated surface. In this case, light-emitting device 132A irradiates the region from the center of drain pan 135 to one end, and light-emitting device 132B irradiates the region from the center of drain pan 135 to the other end. In this configuration, the position of protrusions 190 varies depending on the air conditioner indoor unit 100, so the ranges irradiated by light-emitting devices 132A and 132B are appropriately set depending on the position of protrusions 190. In this way, even if there are protrusions on the bottom surface of drain pan 135, ultraviolet light can be irradiated to the entire irradiated surface 131.

[0063] Figures 7A to 7C are diagrams illustrating the arrangement of light-emitting devices 132 in another sterilization device 130. Figure 7A is a schematic front view of the sterilization device 130, Figure 7B is a plan view of the sterilization device 130, and Figure 7C is a right side view. One light-emitting device 132 illustrated on the left side of Figures 7A and 7B will be referred to as light-emitting device 132A, and the other light-emitting device 132 illustrated on the right side of Figures 7A and 7B will be referred to as light-emitting device 132B.

[0064] As shown in FIGS. 7A to 7C, two light emitting devices 132A and 132B have their optical axes aligned with the normal and the irradiated surface 131. A second straight line along the short side direction of the irradiated surface 131 7A and 7B, of the two light emitting devices 132A and 132B, one light emitting device 132A is located on the irradiated surface 131. Long The other light emitting device 132B irradiates ultraviolet light onto a half area on one side of the irradiated surface 131. Long The two light emitting devices 132A and 132B are arranged such that their optical axes are aligned with the normal and the half of the irradiated surface 131. A second straight line along the short side direction of the irradiated surface 131 The sensors are arranged so as to be located on a virtual plane including the sensor.

[0065] The shape of the irradiated surface 131 is not particularly limited. In this embodiment, the irradiated surface 131 is rectangular in plan view. Has a longitudinal direction and a lateral direction In this case, light flux controlling member 134 has at least Second straight line along the short side The ultraviolet light is collected in the direction (the up and down (front-rear) direction when the light emitting device 132 looks at the irradiated surface 131).

[0066] Figures 8A to 8C are diagrams illustrating the arrangement of light-emitting devices 132 in another sterilization device 130. Figure 8A is a schematic front view of the sterilization device 130, Figure 8B is a plan view of the sterilization device 130, and Figure 8C is a right side view. One light-emitting device 132 illustrated on the left side of Figures 8A and 8B will be referred to as light-emitting device 132A, and the other light-emitting device 132 illustrated on the right side of Figures 8A and 8B will be referred to as light-emitting device 132B.

[0067] As shown in FIGS. 8A to 8C, when the irradiated surface 131 is viewed from above, the two light emitting devices 132A and 132B are First straight line along the longitudinal direction and the angle formed by the optical axis OA is Second straight line along the short side and the optical axis OA. 1st straight line (or 2nd straight line The angle between the optical axis OA and the light beam projected onto the illuminated surface 131 is 1st straight line (or 2nd straight line ) and the light emitting device 132A. In this embodiment, when the sterilization device 130 is viewed from the side, the two light emitting devices 132A and 132B are disposed directly above one half of the irradiated surface 131. As shown in FIGS. 8A and 8B, of the two light emitting devices 132A and 132B, the light emitting device 132A is disposed directly above the light emitting device 132A on the irradiated surface 131. Long The other light emitting device 132B irradiates ultraviolet light onto a half area on one side of the irradiated surface 131. Long The half-surface area on the other side of the direction is irradiated with ultraviolet light.

[0068] The shape of the irradiated surface 131 is not particularly limited. In this embodiment, the irradiated surface 131 is rectangular in plan view. Has a longitudinal direction and a lateral direction In this case, light flux controlling member 134 has at least Second straight line along the short side The ultraviolet light is collected in the direction (the up and down (front-rear) direction when the light emitting device 132 looks at the irradiated surface 131).

[0069] (Variation) Next, we will explain a sterilization device according to a variation of Embodiment 1. The sterilization device according to the variation of Embodiment 1 differs from sterilization device 130 according to Embodiment 1 only in the configuration of light flux controlling member 234. Therefore, explanations other than for light flux controlling member 234 will be omitted.

[0070] (Configuration of Light Flux Control Member) Figures 9A to 9D are diagrams showing the configuration of light flux controlling member 234 of a sterilization device in a variation of Embodiment 1. Figure 9A is a plan view of light flux controlling member 234, Figure 9B is a bottom view, Figure 9C is a side view, and Figure 9D is a cross-sectional view taken along line AA shown in Figure 9A.

[0071] Light flux controlling member 234 has incident surface 241, total reflection surface 242, exit surface 243, and cylindrical portion 244. In the modification of the present embodiment, the flange portion and the leg portion are omitted.

[0072] Incident surface 241 allows ultraviolet light emitted from light emitting element 133 to enter light flux controlling member 234. Incident surface 241 is the inner surface of recess 247 formed to face light emitting element 133. Incident surface 241 has first incident surface 245 corresponding to the bottom surface of recess 247 and second incident surface 246 corresponding to the inner side surface of recess 247.

[0073] First incident surface 245 allows ultraviolet light emitted from light-emitting element 133 with a small emission angle to enter. First incident surface 245 is formed such that the distance between first incident surface 245 and central axis CA gradually increases from incident surface 241 toward emission surface 243 in a cross section including central axis CA. Second incident surface 246 allows ultraviolet light emitted from light-emitting element 133 with a large emission angle to enter. Second incident surface 246 connects first incident surface 245 and total reflection surface 242. Second incident surface 246 is formed such that the distance approaches central axis CA from incident surface 241 toward emission surface 243 in a cross section including central axis CA.

[0074] Total reflection surface 242 reflects a portion of the ultraviolet rays incident from incident surface 241 toward exit surface 243. Here, the term "total reflection surface" refers to a surface intended to totally reflect the ultraviolet rays that reach that surface, out of the ultraviolet rays emitted from the light-emitting center of light-emitting element 133. In the present embodiment, total reflection surface 242 is a rotationally symmetric surface centered on central axis CA, arranged so as to surround central axis CA. The distance between total reflection surface 242 and central axis CA gradually increases from the light-emitting element 133 side toward exit surface 243 of light flux controlling member 234. The shape of total reflection surface 242 in a cross section passing through central axis CA of light flux controlling member 234 is a curve that is convex outward (toward the side away from central axis CA).

[0075] Furthermore, exit surface 243 is arranged opposite to entrance surface 241, and emits to the outside the ultraviolet light that has traveled inside light flux controlling member 234. In the present embodiment, exit surface 243 is a circular plane centered on central axis CA, and is arranged to intersect with central axis CA perpendicularly.

[0076] The tube portion 244 is disposed so as to surround the emission surface 243. There are no particular limitations on the shape of the tube portion 244. In this embodiment, the shape of the tube portion 244 is a cylindrical shape.

[0077] Light flux controlling member 234 according to the modified example focuses the ultraviolet rays emitted from light emitting element 133 by mainly reflecting the ultraviolet rays at total reflection surface 242. Even when light flux controlling member 234 according to the modified example is used instead of light flux controlling member 134, it is possible to irradiate the entire surface of irradiated surface 131 with ultraviolet rays using a small number of light emitting devices 132.

[0078] (effect) As described above, in the sterilization device 130 according to this embodiment, the optical axis OA of the light-emitting device 132 is inclined with respect to the irradiated surface 131, so that light can be irradiated approximately uniformly from directly below the light-emitting device 132 on the irradiated surface 131 to a position far from the light-emitting device 132. Therefore, even when the sterilization device 130 is placed in a position directly above and close to the irradiated surface 131, it can illuminate a wide area of ​​the irradiated surface 131 approximately uniformly.

[0079] [Embodiment 2] Next, a description will be given of a sterilization device 230 according to embodiment 2. The same components as those of the sterilization device 130 according to embodiment 1 will be given the same reference numerals and the description thereof will be omitted.

[0080] FIG. 10 is a diagram showing a partial configuration of a sterilizer 230 according to the second embodiment incorporated into a dehumidifier 300 having a drain pan 235. As shown in FIG.

[0081] As shown in Fig. 10, dehumidifier 300 has an intake section, cooler 311, radiator 312, compressor 313, a fan, sterilizer 130, and an outlet section. That is, dehumidifier 300 equipped with sterilizer 230 according to this embodiment is a compressor type. Note that dehumidifier 300 may be a desiccant type, or a hybrid type that combines a compressor type and a desiccant type. In Fig. 10, the intake section, fan, and outlet section are omitted, and only a portion of the internal structure of dehumidifier 300 is shown.

[0082] The intake section functions to take in water vapor from the room into the dehumidifier 300. The arrangement and shape of the intake section are not particularly limited as long as they can perform the above-mentioned function, and can be designed as appropriate. The blow-out section functions to blow dehumidified air into the room. The arrangement and shape of the blow-out section are not particularly limited as long as they can perform the above-mentioned function, and can be designed as appropriate.

[0083] The cooler 311 causes condensation on its surface, turning the water vapor in the air it takes in into droplets. The droplets are collected in the drain pan 235 and stored in the water storage tank.

[0084] The radiator 312 warms the air cooled by the cooler 311 .

[0085] The compressor 313 is rotated by, for example, an electric motor, and cools and condenses air in the process of compressing and expanding the refrigerant.

[0086] Air taken in from the intake section by the fan is cooled by cooler 311. The cooled air is heated to approximately room temperature by radiator 312, and then released into the room from the outlet section.

[0087] Sterilization device 230 has irradiated surface 231 and light-emitting device 132. Irradiated surface 231 is the inner surface of drain pan 235. In this embodiment, irradiated surface 231 is the inner surface of drain pan 235, but it may also be the inner surface of a water storage tank arranged downstream of drain pan 235. Light-emitting device 132 irradiates irradiated surface 231 (for example, the inner surface of drain pan 235) with ultraviolet light to sterilize the irradiated surface.

[0088] (effect) As described above, the sterilization device 230 according to this embodiment has the same effects as the sterilization device 130 according to the first embodiment.

[0089] [Embodiment 3] Next, a description will be given of a sterilization device 430 according to embodiment 3. The same components as those of the sterilization device 130 according to embodiment 1 will be given the same reference numerals and the description thereof will be omitted.

[0090] FIG. 11A is a diagram showing the configuration of a part of a sterilization device 430 according to the third embodiment.

[0091] 11A, sterilization device 430 has irradiated surface 131, light emitting device 132, shielding member 431, and phosphor 433. Sterilization device 430 is covered with cover 435.

[0092] The cover 435 is arranged to cover the sterilization device 430. The cover 435 has a window 432 (opening). The window 432 is a through-hole that connects the inside and outside of the indoor unit 100. The shape of the window 432 in a plan view is not particularly limited. Examples of the shape of the window 432 in a plan view include a circle, an ellipse, and a polygon. In this embodiment, the window 432 does not necessarily have to be formed intentionally, and may also be a through-hole such as a groove that normally exists between the cover 435 and the blowing section. The window 432 is covered by the shielding member 431.

[0093] Shielding member 431 is disposed so as to cover window portion 432 (opening), and blocks ultraviolet rays emitted from light emitting element 133 while transmitting visible light. In this embodiment, shielding member 431 is formed to be larger than window portion 432, and is disposed so as to cover window portion 432 from the inside of cover 435. This reliably prevents ultraviolet rays from being emitted to the outside through window portion 432. The material of shielding member 431 is not particularly limited as long as it can perform the above-mentioned function. Examples of materials for shielding member 431 include resins such as polymethyl methacrylate (PMMA) and glasses such as BK7, which is borosilicate crown optical glass.

[0094] Phosphor 433 emits visible light (fluorescence) when irradiated with ultraviolet light. Phosphors are usually transparent or white. Phosphor 433 is used by being dispersed in resin or glass, or by being dissolved in a solvent and applied as a phosphor solution to a resin plate or a glass plate, and then cured. In this embodiment, phosphor 433 is applied as a phosphor solution to the light emitting device 132 side of shielding member 431, thereby forming phosphor layer 434. Phosphor layer 434 may be disposed over the entire shielding member 431, or may be disposed over only a portion of shielding member 431.

[0095] Examples of the phosphor 433 that emits red light include Y2O2S:Eu (a material in which Y2O2S is doped with europium, the same notation applies hereinafter), Zn3(PO4)2:Mn, Y2O3:Eu, (Y,Gd)BO3:Eu, Y(P,V)O4:Eu, YVO4:Eu, ZnS:Mn, (Sr·Mg)3(PO4)2:Sn, (ZnSr)3(PO4)2:Mn, 3.5MgO·0.5MgF2·GeO2:Mn, and Mg5As2O 11 :Mn, (Ca,Sr)SiO3:Pb,Mn.

[0096] Examples of phosphors 433 that emit green light include BaMg2Al 16 O 27 :Eu,Mn(BaMgAl 16 O 27 doped with europium and manganese (hereinafter the same notation applies), Zn2SiO4:Mn,As, (Ba,Sr,Mg)O·aAl12O3Mn, (Y,Gd)BO3:Tb, ZnO:Zn, (Ba,Eu)(Mg,Mn)Al 10 O 17 , ZnS:CulAl, ZnS:Cu,Au,Al, Gd2O2S:Tb, LaPO4:Ce,Tb, Sr4Al 14 O 25 :Eu, CeMgAl 11 O 19 :Tb, Ce(Mg,Zn)Al 11 O 19 :Mn, CeMgAl 11 O 19 : Contains Ce and Tb.

[0097] Examples of blue-emitting phosphors include BaMgAl 16 O 27 :Eu, ZnS:Ag, Al, Ga, BaMgAl 10 O 17 :Eu, (Sr, Ca, Ba, Mg) 10 (PO4)6C 12 :Eu, (Ba,Sr,Eu)(Mg,Mn)Al 10 O 17 Sr 10 (PO4)6C 12 :Eu, (Ba,Eu)MgAl 10 O 17 , ZnS:Ag, Y2SiO5:Tb, (Sr,Ca,Ba,Mg)5(PO4)3Cl=Eu, CaWO4, Ba2SrMg3Al 30 O 51 :Eu,Mn, CaWO4:Pb, Sr2P2O7:Eu, (Sr,Ca,Ba)3(PO4)2C 12 :Eu, 3Sr3(PO4)2C 12 :Eu is included.

[0098] A portion of the ultraviolet rays emitted from light-emitting element 133 (light-emitting device 132) is irradiated onto phosphor 433 (phosphor layer 434) arranged on shielding member 431. Phosphor 433 irradiated with ultraviolet rays emits visible light. A user can check whether sterilization device 430 is operating by checking the visible light emitted from phosphor 433 through window 432. Therefore, in this embodiment, even when UVC is used as ultraviolet light, the presence of shielding member 431 and phosphor 433 makes it possible to safely check whether sterilization device 430 is operating.

[0099] (Variation) Next, a sterilization device 530 according to a modification of the present embodiment will be described. The modification of the present embodiment differs from the sterilization device 430 according to embodiment 3 only in the arrangement of the shielding member 431 and the phosphor 433 (phosphor layer 434). Therefore, the same components as those of the sterilization device 430 according to embodiment 3 are denoted by the same reference numerals, and their description will be omitted.

[0100] FIG. 11B is a diagram showing a partial configuration of a sterilization device 530 according to a modification of the third embodiment.

[0101] 11B, shielding member 431 in the modification of the present embodiment is arranged to be fitted into window portion 432. Phosphor 433 (phosphor layer 434) may be arranged to protrude from window portion 432 toward light emitting element 133, or may be arranged inside window portion 432.

[0102] (effect) As described above, the sterilizers 430, 530 according to this embodiment not only have the same effect as the sterilizer 130 according to embodiment 1, but also allow the user to check from the outside whether the sterilizers 430, 530 are operating.

[0103] [Embodiment 4] Next, a description will be given of a sterilization device 630 according to embodiment 4. The same components as those of the sterilization device 130 according to embodiment 1 will be given the same reference numerals and the description thereof will be omitted.

[0104] FIG. 12A is a perspective view showing a partial configuration of a sterilization device 630 according to the fourth embodiment.

[0105] As shown in FIG. 12A, sterilization device 630 has irradiated surface 131, light emitting device 132, shielding member 431, phosphor 433, and light receiving member 631.

[0106] The light receiving member 631 is disposed between the light emitting device 132 and the shielding member 431. The material of the light receiving member 631 is preferably a substance that is not easily deteriorated by irradiation with ultraviolet rays. Examples of the material of the light receiving member 631 include silicone and synthetic quartz. When the material of the light receiving member 631 transmits ultraviolet rays, the phosphor 433 may be disposed on the light emitting device 132 side or on the shielding member 431 side. In this embodiment, the light receiving member 531 is disposed on the surface of the shielding member 431 facing the light emitting device 132.

[0107] The phosphor 433 may be dispersed inside the light receiving member 631, or may be disposed as a phosphor layer 434 on the surface of the light receiving member 631. In this embodiment, the phosphor 433 is dispersed inside the light receiving member 631.

[0108] A portion of the ultraviolet rays emitted from the light-emitting element 133 (light-emitting device 132) is irradiated onto the phosphor 433 arranged on the light-receiving member 631. The phosphor 433 irradiated with the ultraviolet rays emits visible light (fluorescence). By checking the visible light emitted from the phosphor 433, the user can confirm whether the sterilization device 630 is operating.

[0109] (Variation) Next, a sterilization device 730 according to a modification of the present embodiment will be described. The modification of the present embodiment differs from sterilization device 630 according to embodiment 4 only in the arrangement of light receiving member 631 and phosphor 433 (phosphor layer 434). Therefore, the same components as those of sterilization device 630 according to embodiment 4 are denoted by the same reference numerals, and their description will be omitted.

[0110] FIG. 12B is a diagram showing a partial configuration of a sterilization device 730 according to a modification of the fourth embodiment.

[0111] 12B, light receiving member 631 in the modification of this embodiment is disposed on the side of light emitting device 132. Furthermore, phosphor 433 is disposed inside light receiving member 631.

[0112] (effect) As described above, the sterilizers 630, 730 according to the present embodiment not only have the effect of the sterilizer 130 according to embodiment 1, but also allow the user to check from the outside whether the sterilizers 630, 730 are operating. Furthermore, because the sterilizers 630, 730 can block ultraviolet light directed from the light-emitting device 132 toward the shielding member 431, deterioration of the filter disposed between the light-emitting device 132 and the window part 432 can be suppressed.

[0113] In this embodiment, the shielding member 431 may also be disposed so as to fit into the window portion 432. [Industrial Applicability]

[0114] The sterilization device of the present invention can efficiently irradiate an irradiated surface with ultraviolet light emitted from a light-emitting element. In particular, the sterilization device of the present invention can be installed in electrical appliances such as air conditioners, dehumidifiers, and refrigerators that have heat pumps that generate water droplets during use. [Explanation of symbols]

[0115] 100 Indoor unit 110 Heat exchanger 120 fans 130, 230, 430, 530, 630, 730 Sterilizer 131, 231 Irradiated surface 132, 132A, 132B Light-emitting device 133 Light-emitting element 134 Light flux control member 135, 235 drain pan 141 Incidence area 142 Output area 143 Cylinder part 144 Flange 145 Positioning protrusion 146 First Control Section 147 Second Control Section 151 First refractive entrance surface 152 First convex part 153 1st entrance plane 154 1st reflective surface 155 First Ridge 161 Second refractive entrance surface 162 Second convex part 163 Notch 164 2nd entrance plane 165 2nd reflective surface 166 Second Ridge 170 filters 171 Light blocking material 172 Reflective material 180 Storage area 190 convex part 234 Light flux control member 241 Incidence plane 242 Total reflection surface 243 Exit Surface 244 Cylinder part 245 1st entrance plane 246 2nd entrance plane 247 Recess 300 dehumidifier 311 Cooler 312 Heatsink 313 Compressor 431 Shielding material 432 Window 433 Phosphor 434 Phosphor layer 435 Cover 631 Light receiving member CA center axis OA optical axis

Claims

1. A sterilization device disposed inside an indoor unit of an air conditioner or a dehumidifier, a light emitting device including a light emitting element that emits ultraviolet light and a light flux controlling member that condenses the ultraviolet light emitted from the light emitting element; an irradiated surface that is in contact with liquid in an indoor unit of the air conditioner or a drain pan of the dehumidifier and that is irradiated with ultraviolet light emitted from the light-emitting device; and the irradiated surface is a surface having a longitudinal direction and a lateral direction when viewed in a plan view, the light emitting device is arranged such that the optical axis of the light emitting element is inclined with respect to the irradiated surface, and such that, when the irradiated surface is viewed in a plan view, an angle formed between a first line along the longitudinal direction and the optical axis of the light emitting device is smaller than an angle formed between a second line along the lateral direction and the optical axis of the light emitting device; Sterilizer.

2. The sterilization device according to claim 1 , wherein the light-emitting device and the irradiated surface are surrounded by a member that is opaque to ultraviolet light emitted from the light-emitting element.

3. the light-emitting device is disposed so that the optical axis is positioned on a virtual plane including a normal to the illuminated surface and the first straight line; the light flux controlling member condenses the ultraviolet light emitted from the light emitting element at least in the direction of the second straight line. The sterilization device according to claim 1.

4. the sterilization device has a plurality of the light-emitting devices, the plurality of light-emitting devices are arranged such that the optical axes thereof are positioned on the same imaginary plane including a normal to the illumination surface and the first straight line; The sterilization device according to claim 3.

5. The sterilization device according to any one of claims 1 to 4, further comprising a reflecting member for reflecting ultraviolet light emitted from the light emitting device toward the irradiated surface.

6. The sterilization device according to any one of claims 1 to 5, further comprising a light-shielding member for blocking ultraviolet light emitted from the light-emitting device and reaching any surface other than the irradiated surface.

7. a shielding member that blocks ultraviolet light emitted from the light-emitting element; a phosphor that emits light of a visible light wavelength when irradiated with ultraviolet light; and The ultraviolet light emitted from the light-emitting element is irradiated onto the phosphor and converted into light with a wavelength of visible light, and the light is observed from outside the indoor unit of the air conditioner or the dehumidifier. The sterilization device according to claim 1.

8. The sterilizer according to claim 7 , wherein the phosphor is disposed on a surface of the shielding member facing the light emitting device.

9. a light receiving member that is disposed between the light emitting element and the shielding member and transmits visible light; The phosphor is disposed on the light receiving member. The sterilization device according to claim 7.

10. The sterilizer according to any one of claims 7 to 9, wherein the shielding member is arranged to block an opening formed in a cover of the indoor unit of the air conditioner or the dehumidifier.

Images