Air purification apparatus

Abstract

To provide an air purification apparatus that can improve air purification performance.SOLUTION: An air purification apparatus 1 includes an ultraviolet light source 2 for emitting ultraviolet light, a first reflector 3 for reflecting the ultraviolet light emitted from the ultraviolet light source 2, and a second reflector 4 which reflects the ultraviolet light, emitted from the ultraviolet light source 2 and reflected by the first reflector 3, toward the first reflector 3, while forming an air flow path 11 between the second reflector 4 and the first reflector 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air purification device. [Background technology]

[0002] Patent Document 1 discloses a deodorizing device for deodorizing odorous enclosed spaces such as shoe cabinets and trash cans. The deodorizing device described in Patent Document 1 includes a light source, a concave mirror that reflects light emitted from the light source, and a photocatalytic element that is irradiated with the light reflected by the concave mirror. In the deodorizing device described in Patent Document 1, the light emitted from the light source is reflected by the concave mirror and irradiated onto the photocatalytic element, activating the photocatalyst and decomposing odorous substances. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-201994 Summary of the Invention [Problem to be solved by the invention]

[0004] In the deodorizing device described in Patent Document 1, no consideration is given to improving the air purification capacity of the light emitted by the light source itself.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air purifying device that can improve air purification performance. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides an air purifying device comprising: an ultraviolet light source that emits ultraviolet light; a first reflecting portion that reflects the ultraviolet light emitted from the ultraviolet light source; and a second reflecting portion that reflects the ultraviolet light emitted from the ultraviolet light source and reflected by the first reflecting portion toward the first reflecting portion and forms an air flow path between the first reflecting portion and the second reflecting portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an air purifying device that can improve air purification performance. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a partial cross-sectional view of an air purification device according to a first embodiment. [Figure 2] 1. The ultraviolet light source, the cross section of the first reflecting portion, and the cross section of the second reflecting portion are extracted from FIG. [Figure 3] FIG. 10 is a front view of an air purification device according to a second embodiment. [Figure 4] FIG. 4 is a view taken along line IV in FIG. 3. [Figure 5] FIG. 10 is a partial cross-sectional view of an air purification device according to a third embodiment. [Figure 6] FIG. 6 is a view taken along the line VI in FIG. 5. [Figure 7] FIG. 10 is a partial cross-sectional view of an air purification device according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [First embodiment] A first embodiment of the present invention will be described with reference to Figures 1 and 2. The embodiment described below is shown as a preferred specific example for carrying out the present invention, and although various technically preferable technical matters are specifically exemplified, the technical scope of the present invention is not limited to this specific embodiment.

[0010] (Air purifier 1) Fig. 1 is a partial cross-sectional view of an air purifying device 1 in this embodiment. Fig. 2 shows cross sections of an ultraviolet light source 2, a first reflecting unit 3, and a second reflecting unit 4 extracted from Fig. 1. Fig. 2 shows two examples of the path of ultraviolet light emitted from the ultraviolet light source 2. In Fig. 2, the path of ultraviolet light emitted from the ultraviolet light source 2 and before being reflected by the first reflecting unit 3 is shown by a solid arrow, the path of ultraviolet light after being reflected a first time by the first reflecting unit 3 is shown by a dashed-dotted arrow, the path of ultraviolet light after being reflected a second time by the second reflecting unit 4 is shown by a dashed-dotted arrow, and the path of ultraviolet light after being reflected a second time by the first reflecting unit 3 is shown by a broken line.

[0011] As shown in FIG. 1, an air purifying device 1 of this embodiment is installed in a room 10 and purifies the air in the room 10. The air purifying device 1 includes an ultraviolet light source 2 that emits ultraviolet light, a first reflecting section 3 that reflects the ultraviolet light emitted from the ultraviolet light source 2, and a second reflecting section 4 that reflects the ultraviolet light emitted from the ultraviolet light source 2 and reflected by the first reflecting section 3 back toward the first reflecting section 3. An air flow path 11 through which air in the room 10 can circulate is formed between the first reflecting section 3 and the second reflecting section 4. As shown in FIG. 2, the air purifying device 1 causes the ultraviolet light emitted from the ultraviolet light source 2 to be multiple-reflected (e.g., reflected two or more times) within the air flow path 11 by the first reflecting section 3 and the second reflecting section 4, thereby enabling the ultraviolet light to be efficiently irradiated onto bacteria, viruses, and the like in the air within the air flow path 11, thereby improving air purification performance. As the air in the room 10 repeatedly passes through the air purifying device 1, viruses, bacteria, etc. in the air in the room 10 are gradually killed.

[0012] Hereinafter, the arrangement direction of the first reflecting section 3 and the second reflecting section 4 will be referred to as the up-down direction Z, the side of the first reflecting section 3 relative to the second reflecting section 4 will be referred to as the upper side, and the side of the second reflecting section 4 relative to the first reflecting section 3 will be referred to as the lower side. In this embodiment, when the air purifying device 1 is installed in the room 10, the up-down direction Z is the vertical direction, the upper side of the up-down direction Z is the upper side in the vertical direction, and the lower side of the up-down direction Z is the lower side in the vertical direction.

[0013] The ultraviolet light source 2 can be, for example, a light emitting diode (LED). The ultraviolet light source 2 is, for example, an ultraviolet LED that emits ultraviolet light with a central wavelength of 200 nm or more and 350 nm or less, and in this embodiment in particular, is a deep ultraviolet LED that emits deep ultraviolet light with a central wavelength of 290 nm or less. Among ultraviolet lights, deep ultraviolet light has high sterilization performance against viruses, bacteria, etc.

[0014] The ultraviolet light source 2 is disposed in the space between the first reflecting unit 3 and the second reflecting unit 4 in the vertical direction Z. The ultraviolet light source 2 has an irradiation surface 21 on its upper surface, from which light is extracted, and is disposed with the irradiation surface 21 facing the first reflecting unit 3.

[0015] As shown in FIG. 1 , the ultraviolet light source 2 is held by the support 5, for example, at a location opposite the irradiation surface 21. The support 5 extends, for example, from the center of the second reflector 4 and has a long columnar shape in the vertical direction Z. If the support 5 is formed large, there is a risk that the support 5 may absorb or reflect ultraviolet light. Therefore, by forming the support 5 in a long columnar shape in the vertical direction Z, ultraviolet light is prevented from reaching the support 5. The support 5 is preferably made of a material capable of absorbing ultraviolet light emitted by the ultraviolet light source 2. This prevents ultraviolet light in the air flow path 11 from being reflected by the support 5 and leaking to the outside. For example, the absorbance of the support 5 with respect to ultraviolet light emitted by the ultraviolet light source 2 is preferably 50% or more, more preferably 80% or more. Furthermore, the support 5 preferably has thermal conductivity and serves as a heat sink to dissipate heat generated by the ultraviolet light source 2.

[0016] 2, the first reflecting section 3 first reflects the ultraviolet light emitted from the ultraviolet light source 2. The first reflecting section 3 is made of a material that reflects the ultraviolet light emitted from the ultraviolet light source 2. The reflectance of the first reflecting section 3 with respect to the ultraviolet light emitted from the ultraviolet light source 2 is preferably 80% or more, and more preferably 90% or more.

[0017] As shown in FIG. 1, the first reflecting unit 3 is disposed so as to cover the ultraviolet light source 2 from above. The first reflecting unit 3 is formed as a concave curved surface recessed upward. In this embodiment, the first reflecting unit 3 is configured as a concave mirror. That is, the first reflecting unit 3 is formed as a parabolic surface open downward. As shown in FIG. 2, the ultraviolet light source 2 is disposed at the focal position of the first reflecting unit 3, and the first reflecting unit 3 reflects the ultraviolet light emitted from the ultraviolet light source 2 to form parallel light along the vertical direction Z (see the dashed-dotted arrow in FIG. 2). The ultraviolet light source 2 may be positioned anywhere so long as the light emitted from the ultraviolet light source 2 is reflected from the first reflecting unit 3 to the second reflecting unit 4. For example, the ultraviolet light source 2 may be positioned away from the focal position of the first reflecting unit 3. In this case, the ultraviolet light source 2 is preferably positioned within the range in which the opening 111 is formed in the vertical direction Z (i.e., the range between the first reflecting unit 3 and the second reflecting unit 4 in the vertical direction Z in this embodiment). Furthermore, the position of the ultraviolet light source 2 is more preferably a position that overlaps with the focal point of the first reflecting portion 3 in the vertical direction Z, within the above-mentioned formation range.

[0018] 1, the first reflecting section 3 is formed in an area wider than the area within the directivity half-value angle θ1 [°] of the ultraviolet light source 2. In other words, of the ultraviolet light emitted from the ultraviolet light source 2, all ultraviolet light having an intensity equal to or greater than half the maximum intensity is reflected by the first reflecting section 3. In this embodiment, the directivity half-value angle θ1 is less than 180°. The ultraviolet light emitted from the ultraviolet light source 2 and reflected by the first reflecting section 3 travels toward the second reflecting section 4.

[0019] The second reflecting section 4 reflects the ultraviolet light reflected by the first reflecting section 3 back to the first reflecting section 3 as shown by the dashed-dotted arrow in Fig. 2. In this embodiment, the second reflecting section 4 is configured separately from the first reflecting section 3 and is made of a material that reflects the ultraviolet light emitted by the ultraviolet light source 2. The reflectance of the second reflecting section 4 with respect to the ultraviolet light emitted by the ultraviolet light source 2 is preferably 80% or more, and more preferably 90% or more.

[0020] As shown in FIG. 1, the second reflecting section 4 is disposed so as to cover the ultraviolet light source 2 from below. The second reflecting section 4 is formed in a concave curved shape that is recessed downward. In this embodiment, the second reflecting section 4 is configured as a concave mirror. That is, the second reflecting section 4 is formed in a parabolic shape that is open upward. The second reflecting section 4 is formed symmetrically with the first reflecting section 3 in the vertical direction with the ultraviolet light source 2 at the center.

[0021] The second reflecting portion 4 is disposed at a distance from the first reflecting portion 3 in the vertical direction Z, and the first reflecting portion 3 and the second reflecting portion 4 are disposed so that their open portions face each other. As a result, an opening 111 of the air flow path 11 is formed around the entire circumference between the first reflecting portion 3 and the second reflecting portion 4. In a cross section of the air purifying device 1 that passes through the ultraviolet light source 2 and is parallel to the vertical direction Z, the opening angle θ2 [°] of the opening 111 centered on the ultraviolet light source 2 preferably satisfies θ2≦180°−θ1. In this case, leakage of ultraviolet light from the opening 111 is easily suppressed.

[0022] The second reflecting unit 4 focuses the parallel light from the first reflecting unit 3, as indicated by the dashed-dotted arrow in Fig. 2, at a focal position, as indicated by the dashed-two-dotted arrow in Fig. 2. In this embodiment, the focal position of the second reflecting unit 4 is the position of the ultraviolet light source 2. Note that the focal position of the second reflecting unit 4 may be shifted from the position of the ultraviolet light source 2. In this case, the focal position of the second reflecting unit 4 is preferably, for example, a position overlapping with the ultraviolet light source 2 in the vertical direction Z.

[0023] Although detailed illustration is omitted, the second reflecting portion 4 is connected to the first reflecting portion 3. For example, by providing a connecting member that connects the first reflecting portion 3 and the second reflecting portion 4 outside the air flow path 11, ultraviolet light in the air flow path 11 is prevented from being absorbed, reflected, or the like by the connecting member. Furthermore, the connecting member may be disposed inside the air flow path 11. In this case, the connecting member may be used both as a member for heat dissipation and wiring.

[0024] As shown in FIG. 1 , the air purifying device 1 of this embodiment further includes a fan 6 and a connector unit 7. The fan 6 generates an air flow in the air flow path 11. In this embodiment, the fan 6 is disposed at one location in the opening 111. The fan 6 may be used to introduce air into the air flow path 11, or may be used to exhaust air from the air flow path 11. The fan 6 is disposed at a position overlapping the ultraviolet light source 2 when viewed from the direction of the rotation axis of the fan 6. This makes it easier for the airflow generated by the fan 6 to be guided around the ultraviolet light source 2, improving the heat dissipation of the ultraviolet light source 2. In addition, the presence of an opening 111 on the opposite side of the ultraviolet light source 2 from the fan 6 further improves the heat dissipation of the ultraviolet light source 2.

[0025] The fan 6 is preferably made of a material capable of absorbing the ultraviolet light emitted by the ultraviolet light source 2. This prevents, for example, weak ultraviolet light emitted in a region outside the directivity half-value angle θ1 of the ultraviolet light source 2 from leaking out from the opening 111. The absorption rate of the fan 6 for the ultraviolet light emitted by the ultraviolet light source 2 is preferably 80% or more, and more preferably 90% or more.

[0026] Although not shown in the figures, the fan 6 is fixed to at least one of the first reflecting section 3 and the second reflecting section 4. For example, by providing a fixing member for fixing the fan 6 and the first reflecting section 3 outside the air flow path 11, the ultraviolet light in the air flow path 11 is prevented from being absorbed, reflected, etc. by the fixing member. Alternatively, the fixing member may be disposed inside the air flow path 11. The fan 6 and the ultraviolet light source 2 are supplied with power from the connector section 7.

[0027] The connector unit 7 is fixed to an upper part of the first reflecting unit 3. The connector unit 7 is a connector that can be connected to a lighting device connection unit 101a provided on the ceiling 101 of the room 10. The lighting device connection unit 101a is already provided in the room 10 for connecting a lighting device. In this embodiment, the connector unit 7 is a ceiling hook cap that can be connected to a ceiling hook body that serves as the lighting device connection unit 101a. Note that the configuration of the connector unit 7 is not limited to this, and it may be a connector having a base that is screwed into a light bulb socket that serves as the lighting device connection unit 101a. When the connector unit 7 is connected to the lighting device connection unit 101a, power is supplied to each part of the air purifying device 1 (the fan 6 and the ultraviolet light source 2 in this embodiment). Note that the wiring paths from the connector unit 7 to the fan 6 and the ultraviolet light source 2 are not shown in the drawing.

[0028] (Functions and Effects of the First Embodiment) The air purifying device 1 includes an ultraviolet light source 2 that emits ultraviolet light, a first reflecting section 3 that reflects the ultraviolet light emitted from the ultraviolet light source 2, and a second reflecting section 4 that reflects the ultraviolet light emitted from the ultraviolet light source 2 and reflected by the first reflecting section 3 back toward the first reflecting section 3 and forms an air flow path 11 between the first reflecting section 3 and the second reflecting section 4. Therefore, the ultraviolet light is reflected multiple times by the first reflecting section 3 and the second reflecting section 4, and is used efficiently for air purification. This improves the air purification performance of the air purifying device 1.

[0029] Furthermore, the first reflecting portion 3 is formed in a concave curved shape. Therefore, the ultraviolet light emitted from the ultraviolet light source 2 is condensed and used more efficiently for air purification. This improves the air purification performance of the air purifying device 1. In particular, by configuring the first reflecting portion 3 as a concave mirror, the air purification performance of the air purifying device 1 can be further improved.

[0030] Furthermore, the second reflecting portion 4 is formed into a concave curved surface. Therefore, the ultraviolet light reflected by the second reflecting portion 4 is easily directed toward the first reflecting portion 3. This also allows the ultraviolet light emitted from the ultraviolet light source 2 to be used more efficiently for air purification, improving the air purification performance of the air purifying device 1. In particular, by configuring the second reflecting portion 4 as a concave mirror, the air purification performance of the air purifying device 1 can be further improved.

[0031] The air purifier 1 further includes a fan 6 disposed at the opening 111 of the air flow path 11. This allows the fan 6 to be installed while preventing the air purifier 1 from becoming larger. Furthermore, irradiation of the fan 6 with ultraviolet light within the air flow path 11 is prevented, thereby preventing the ultraviolet light from being absorbed by the fan 6 or reflected by the fan 6 and leaking out of the opening 111 of the air flow path 11. In particular, by making the fan 6 out of a material that absorbs the ultraviolet light emitted by the ultraviolet light source 2, it is easier to further prevent the ultraviolet light from leaking out of the opening 111 of the air flow path 11.

[0032] Furthermore, the ultraviolet light source 2 is a light-emitting diode, and the first reflecting portion 3 is formed in an area wider than the area within the directivity half-value angle θ1 of the ultraviolet light source 2. Therefore, light emitted from the ultraviolet light source 2, at least light having a light intensity of 50% or more of the maximum value, is reflected from the first reflecting portion 3 to the second reflecting portion 4, so that the ultraviolet light is used more efficiently for air purification, and the air purification performance of the air purifying device 1 is improved.

[0033] The air purifying device 1 also has a connector 7 that can be connected to a lighting device connection part 101a provided on the ceiling 101 of the room 10. Since the lighting device connection part 101a is often already provided on the ceiling 101 of the room 10, this embodiment can provide an air purifying device 1 that can be easily installed in the room 10.

[0034] As described above, according to this embodiment, it is possible to provide an air purifying device that can improve air purification performance.

[0035] [Second embodiment] A second embodiment of the present invention will be described with reference to FIGS. Fig. 3 is a front view of the air purification device 1 in this embodiment, and Fig. 4 is a view taken along line IV in Fig. 3.

[0036] In this embodiment, the configurations of the first reflecting section 3 and the second reflecting section 4 are changed from those of the first embodiment.

[0037] The first reflecting section 3 is formed long in one direction (hereinafter referred to as the longitudinal direction X) perpendicular to the up-down direction Z, and its cross-sectional shape perpendicular to the longitudinal direction X is a curved shape concave upward. For example, the first reflecting section 3 is formed in the shape of a concave curved surface like the side of a long cylinder vertically divided into two. The direction perpendicular to both the longitudinal direction X and the up-down direction Z is referred to as the short direction Y.

[0038] The second reflecting portion 4 is formed long in the longitudinal direction X, and its cross section perpendicular to the longitudinal direction X is a curved shape concave downward. The second reflecting portion 4 is formed symmetrically with the first reflecting portion 3 with respect to the ultraviolet light source 2.

[0039] The space between the first reflecting section 3 and the second reflecting section 4 serves as an air flow path 11. The opening of the air flow path 11 has two horizontal openings 111a formed by both end portions of the first reflecting section 3 and the second reflecting section 4 in the short direction Y, and two vertical openings 111b formed by both end portions of the first reflecting section 3 and the second reflecting section 4 in the long direction X.

[0040] In this embodiment, the fan 6 is disposed in one of the vertical openings 111b. This prevents ultraviolet light emitted from the ultraviolet light source 2 from leaking out of the vertical opening 111b. Furthermore, by disposing the fan 6 in the vertical opening 111b located at one end of the air flow path 11 in the longitudinal direction X, it becomes easier to introduce air into the entire air flow path 11. The fan 6 may also be disposed in the horizontal opening 111a.

[0041] As shown in Fig. 4, this embodiment has a plurality of ultraviolet light sources 2 (specifically, light emitting diodes). The plurality of ultraviolet light sources 2 are arranged side by side in the longitudinal direction X. The plurality of ultraviolet light sources 2 are supported by a common support portion 5. The support portion 5 is formed to be long in the longitudinal direction X and short in the lateral direction Y.

[0042] The rest is the same as in the first embodiment. It should be noted that, among the symbols used in the second and subsequent embodiments, the same symbols as those used in the previously described embodiments represent the same components, etc. as those in the previously described embodiments, unless otherwise specified.

[0043] [Third embodiment] A third embodiment of the present invention will be described with reference to FIGS. Fig. 5 is a partial cross-sectional view of the air purification device 1 in this embodiment. Fig. 6 is a view taken along line VI in Fig. 5.

[0044] In this embodiment, the configurations of the first reflecting section 3 and the second reflecting section 4 are changed from those of the first embodiment.

[0045] In this embodiment, the first reflecting portion 3 and the second reflecting portion 4 are integrally formed. Specifically, the air purifying device 1 of this embodiment has a spherical member 8, and different portions of the spherical member 8 form the first reflecting portion 3 and the second reflecting portion 4. The spherical member 8 is formed in a spherical shape, and the ultraviolet light source 2 is housed in the air flow path 11, which is the space inside the spherical member 8. At least the inner surface of the spherical member 8 is made of a material that reflects the ultraviolet light emitted by the ultraviolet light source 2.

[0046] The first reflecting section 3 is a section of the spherical member 8 that is located above the ultraviolet light source 2 and that first reflects the ultraviolet light emitted from the ultraviolet light source 2, and the second reflecting section 4 is a section of the spherical member 8 that is located below the ultraviolet light source 2 and that reflects the ultraviolet light reflected by the first reflecting section 3 back to the first reflecting section 3. The inner surface of the spherical member 8 does not have to be a perfect sphere. For example, the first reflecting section 3 may be formed in a shape that collimates the ultraviolet light emitted by the ultraviolet light source 2.

[0047] Two openings 111 of the air flow path 11 are formed in the spherical member 8. The two openings 111 are formed at the center of the spherical member 8 in the vertical direction Z, at positions that overlap each other in a direction perpendicular to the vertical direction Z. By configuring the spherical member 8 to have multiple openings 111, it is easy to form the openings 111 with the minimum necessary size, and leakage of ultraviolet light from the inside of the spherical member 8 to the outside can be suppressed. A fan 6 is disposed in one of the openings 111.

[0048] The rest is the same as in the first embodiment.

[0049] [Fourth embodiment] A fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a partial cross-sectional view of the air purification device 1 in this embodiment.

[0050] This embodiment differs from the first embodiment in that it further includes an illumination unit 9 that illuminates the room 10. The illumination unit 9 is not particularly limited, but may include, for example, an LED element that emits visible light such as white or warm white. In this embodiment, the illumination unit 9 is provided below the second reflecting unit 4 and is configured to illuminate the downward side. The illumination unit 9 receives power from, for example, the connector unit 7. Note that the configuration, arrangement, etc. of the illumination unit 9 are not limited to those described above, and may be any configuration that can illuminate the room 10. According to this embodiment, the air purifying device 1 can illuminate the room 10 in addition to purifying the air in the room 10. The rest is the same as in the first embodiment.

[0051] [Variations] Other possible modifications of the air purification device 1 will be described below.

[0052] In the first to fourth embodiments, an example has been described in which both the first reflecting section and the second reflecting section have a concave curved surface shape, but this is not limiting. For example, at least one of the first reflecting section and the second reflecting section may be formed in a flat surface. Furthermore, at least one of the first reflecting section and the second reflecting section may be a concave surface made up of a plurality of flat surfaces. From the viewpoint of facilitating the generation of multiple reflections, it is preferable that both the first reflecting section and the second reflecting section have a concave surface shape (particularly a concave curved surface shape) as shown in the first to fourth embodiments.

[0053] Although the first to fourth embodiments illustrate examples in which a filter is not used, a filter may be used. For example, a filter may be provided to surround at least a portion of the opening, preferably the entire opening, or the entire opening except for the portion where the fan is located. This allows the filter to capture viruses, bacteria, etc. in the air, improving the air purification performance of the air purifier. The filter may also support a catalyst that is activated by irradiation with ultraviolet light emitted by the ultraviolet light source. This further improves the air purification performance of the air purifier. Furthermore, by constructing the filter from a material that absorbs or reflects ultraviolet light emitted by the ultraviolet light source, leakage of ultraviolet light can be further suppressed.

[0054] Furthermore, in the first to fourth embodiments, an example using one fan has been shown, but this is not limiting. For example, the fan may be omitted. For example, if a circulation device that circulates air in the room, such as an air conditioner or a ventilation fan, is present in the room, the circulation device circulates the air in the room, and at the same time, the air in the air flow path of the air purifier is also circulated. Furthermore, the air purifier may be provided with multiple fans.

[0055] In the first to fourth embodiments, the ultraviolet light source may include one that emits ultraviolet light upward and one that emits ultraviolet light downward.

[0056] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiments will be described by using the reference numerals and the like in the embodiments. However, the reference numerals and the like in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiments.

[0057] [1] A first embodiment of the present invention is an air purifying device 1 comprising an ultraviolet light source 2 that emits ultraviolet light, a first reflecting section 3 that reflects the ultraviolet light emitted from the ultraviolet light source 2, and a second reflecting section 4 that reflects the ultraviolet light emitted from the ultraviolet light source 2 and reflected by the first reflecting section 3 toward the first reflecting section 3 and forms an air flow path 11 between the first reflecting section 3 and the second reflecting section 4. This improves the air purification performance of the air purification device 1.

[0058] [2] A second embodiment of the present invention is the first embodiment, wherein the first reflecting portion 3 is formed in a concave curved shape. This improves the air purification performance of the air purification device 1.

[0059] [3] A third embodiment of the present invention is the second embodiment, in which the first reflecting portion 3 is configured by a concave mirror. This improves the air purification performance of the air purification device 1.

[0060] [4] A fourth embodiment of the present invention is any one of the first to third embodiments, wherein the second reflecting portion 4 is formed in a concave curved shape. This improves the air purification performance of the air purification device 1.

[0061] [5] A fifth embodiment of the present invention is the fourth embodiment, in which the second reflecting portion 4 is configured by a concave mirror. This improves the air purification performance of the air purification device 1.

[0062] [6] A sixth embodiment of the present invention is any one of the first to fifth embodiments, further comprising a fan 6 arranged at the opening 111, 111a, 111b of the air flow path 11. This allows the fan 6 to be installed while preventing the air purifying device 1 from becoming larger.

[0063] [7] A seventh embodiment of the present invention is the sixth embodiment, in which the fan 6 is made of a material that absorbs the ultraviolet light emitted by the ultraviolet light source 2. This makes it easier to prevent ultraviolet light from leaking from the openings 111, 111a, and 111b of the air flow path 11.

[0064] [8] An eighth embodiment of the present invention is any one of the first to seventh embodiments, in which the ultraviolet light source 2 is a light-emitting diode, and the first reflecting portion 3 is formed in an area wider than the area within the directivity half angle θ1 of the ultraviolet light source 2. This improves the air purification performance of the air purification device 1.

[0065] [9] A ninth embodiment of the present invention is that, in any one of the first to eighth embodiments, it further has a connector part 7 that can be connected to a lighting equipment connection part 101a provided on the ceiling 101 of the room 10. This makes it possible to provide the air purifying device 1 that can be easily installed in the room 10.

[0066]

[10] A tenth embodiment of the present invention is the ninth embodiment, further comprising a lighting unit 9 that illuminates the room 10. This allows the air purification device 1 to purify the air in the room 10 and illuminate the room 10 at the same time.

[0067] (Addendum) Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above-described embodiments. It should be noted that not all of the combinations of features described in the embodiments are necessarily essential to the means for solving the problems of the invention. Furthermore, the present invention can be appropriately modified and implemented within the scope of its spirit. [Explanation of symbols]

[0068] 1...Air purifier 10…Indoor 101...Ceiling 101a...Lighting equipment connection 11...Air flow path 111...Opening 111a…Side opening 111b...Vertical opening 2...Ultraviolet light source 3...1st reflection section 4…Second reflection section 6...Fan 7...Connector part 9...Lighting section

Claims

1. an ultraviolet light source that emits ultraviolet light; a first reflecting portion that reflects ultraviolet light emitted from the ultraviolet light source; a second reflecting portion that reflects, toward the first reflecting portion, the ultraviolet light emitted from the ultraviolet light source and reflected by the first reflecting portion, and that forms an air flow path between the second reflecting portion and the first reflecting portion, Air purifier.

2. The first reflecting portion is formed into a concave curved surface. The air purifying device according to claim 1 .

3. The first reflecting portion is configured by a concave mirror. The air purifying device according to claim 2 .

4. The second reflecting portion is formed into a concave curved surface. The air purifying device according to claim 1 or 2.

5. The second reflecting portion is configured by a concave mirror.

5. The air purifying device according to claim 4.

6. further comprising a fan disposed at the opening of the air flow path; The air purifying device according to claim 1 or 2.

7. The fan is made of a material that absorbs the ultraviolet light emitted by the ultraviolet light source.

7. The air purifying device according to claim 6.

8. the ultraviolet light source is a light emitting diode; the first reflecting portion is formed in an area wider than an area within a directivity half-value angle of the ultraviolet light source; The air purifying device according to claim 1 or 2.

9. The lighting fixture further includes a connector portion connectable to a lighting device connector portion provided on the ceiling of the room. The air purifying device according to claim 1 or 2.

10. Further comprising a lighting unit that illuminates the interior of the room.

10. The air purifying device according to claim 9.

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