Air purification device

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 Art

[0002] Patent Document 1 discloses a deodorizing device for deodorizing a sealed space accompanied by odors such as a shoe box and a trash can. The deodorizing device described in Patent Document 1 includes a light source, a concave mirror that reflects the light emitted from the light source, and a photocatalyst element 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 photocatalyst element, whereby the photocatalyst is activated and the odor substance is decomposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the deodorizing device described in Patent Document 1, improvement of the air purification ability of the light emitted by the light source itself is not considered.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide an air purification device capable of enhancing air purification performance.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention includes an ultraviolet light source that emits ultraviolet light, a first reflection part that reflects the ultraviolet light emitted from the ultraviolet light source, and a second reflection part that reflects the ultraviolet light emitted from the ultraviolet light source and reflected by the first reflection part toward the first reflection part, and forms an air flow path between the second reflection part and the first reflection part. The first reflecting section is composed of a concave mirror that follows the surface of a sphere.We provide air purification devices. [Effects of the Invention]

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

[0008] [Figure 1] This is a partial cross-sectional view of the air purification device in the first embodiment. [Figure 2] This figure shows the ultraviolet light source, the cross-section of the first reflector, and the cross-section of the second reflector, extracted from Figure 1. [Figure 3] This is a front view of the air purification device in the second embodiment. [Figure 4] This is a view taken along line IV in Figure 3. [Figure 5] This is a partial cross-sectional view of the air purification device in the third embodiment. [Figure 6] This is a view from the direction of line VI in Figure 5. [Figure 7] This is a partial cross-sectional view of the air purification device in the fourth embodiment. [Modes for carrying out the invention]

[0009] [First Embodiment] A first embodiment of the present invention will be described with reference to Figures 1 and 2. The embodiments described below are presented as preferred specific examples for carrying out the present invention, and while some parts specifically illustrate various technically preferable technical matters, the technical scope of the present invention is not limited to these specific embodiments.

[0010] (Air purification device 1) Figure 1 is a partial cross-sectional view of the air purification device 1 in this embodiment. Figure 2 shows the cross-sections of the ultraviolet light source 2, the first reflector 3, and the second reflector 4 extracted from Figure 1. Figure 2 shows two examples of the paths of ultraviolet light emitted from the ultraviolet light source 2. In Figure 2, the path of ultraviolet light emitted from the ultraviolet light source before reflection by the first reflector 3 is shown by a solid arrow, the path of ultraviolet light after the first reflection by the first reflector 3 is shown by a dashed-dotted arrow, the path of ultraviolet light after reflection by the second reflector 4 is shown by a double-dotted-dotted arrow, and the path of ultraviolet light after the second reflection by the first reflector 3 is shown by a dashed line.

[0011] As shown in Figure 1, the air purification device 1 of this embodiment is installed in a room 10 and purifies the air in the room 10. The air purification device 1 comprises 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 towards the first reflecting section 3. An air passage 11 through which the air of the room 10 can flow is formed between the first reflecting section 3 and the second reflecting section 4. As shown in Figure 2, the air purification device 1 improves air purification performance by efficiently irradiating bacteria, viruses, etc. in the air within the air passage 11 with ultraviolet light by causing multiple reflections (for example, reflection two or more times) of the ultraviolet light emitted from the ultraviolet light source 2 by the first reflecting section 3 and the second reflecting section 4 within the air passage 11. As the air in room 10 repeatedly passes through the air purification device 1, viruses, bacteria, and other microorganisms in the air of room 10 are gradually killed.

[0012] Hereafter, the direction in which the first reflector 3 and the second reflector 4 are aligned will be referred to as the vertical direction Z, the side of the first reflector 3 relative to the second reflector 4 will be referred to as the upper side, and the side of the second reflector 4 relative to the first reflector 3 will be referred to as the lower side. In this embodiment, with the air purification device 1 installed in the room 10, the vertical direction Z is the vertical direction, the upper side of the vertical direction Z is the upper side in the vertical direction, and the lower side of the vertical 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 to 350 nm, and in this embodiment in particular, a deep ultraviolet LED that emits deep ultraviolet light with a central wavelength of 290 nm or less. Deep ultraviolet light has high bactericidal properties against viruses, bacteria, etc., among ultraviolet light.

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

[0015] As shown in Figure 1, the ultraviolet light source 2 is held by a support portion 5, for example, at a point opposite to the irradiation surface 21. The support portion 5 extends, for example, from the center of the second reflecting portion 4 and has a long columnar shape in the vertical direction Z. If the support portion 5 is formed to be large, there is a risk of absorption and reflection of ultraviolet light by the support portion 5. Therefore, by making the support portion 5 a long columnar shape in the vertical direction Z, the amount of ultraviolet light that strikes the support portion 5 is suppressed. The support portion 5 is preferably made of a material capable of absorbing the ultraviolet light emitted by the ultraviolet light source 2. This suppresses the leakage of ultraviolet light in the air channel 11 from being reflected by the support portion 5 to the outside. For example, the absorption rate of the support portion 5 with respect to the ultraviolet light emitted by the ultraviolet light source 2 is preferably 50% or more, and more preferably 80% or more. Furthermore, it is preferable that the support portion 5 has thermal conductivity and acts as a heat sink to dissipate the heat generated in the ultraviolet light source 2.

[0016] As shown in Figure 2, the first reflector 3 initially reflects the ultraviolet light emitted from the ultraviolet light source 2. The first reflector 3 is made of a material that reflects the ultraviolet light emitted from the ultraviolet light source 2. The reflectance of the first reflector 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 portion 3 is arranged to cover the ultraviolet light source 2 from above. The first reflecting portion 3 is formed in a concave curved surface shape that is recessed upward. In this embodiment, the first reflecting portion 3 is constituted by a concave mirror. That is, the first reflecting portion 3 is formed in a paraboloid shape that is open downward. And, as shown in FIG. 2, the ultraviolet light source 2 is arranged at the focal position of the first reflecting portion 3, and the first reflecting portion 3 reflects the ultraviolet light emitted from the ultraviolet light source 2 into parallel light (refer to the arrow of the dashed line in FIG. 2) along the vertical direction Z. Note that the position of the ultraviolet light source 2 may be any position as long as the light emitted from the ultraviolet light source 2 is reflected from the first reflecting portion 3 to the second reflecting portion 4, and for example, it may be a position deviated from the focal position of the first reflecting portion 3. In this case, the ultraviolet light source 2 is preferably arranged in the formation range of the opening 111 in the vertical direction Z (that is, in this embodiment, the range from the first reflecting portion 3 to the second reflecting portion 4 in the vertical direction Z). Further, among the above-described formation ranges, the position where the ultraviolet light source 2 overlaps with the focal point of the first reflecting portion 3 in the vertical direction Z is more preferable.

[0018] As shown in FIG. 1, the first reflecting portion 3 is formed in a region wider than the region within the directivity half-value angle θ1 [°] of the ultraviolet light source 2. That is, all of the ultraviolet light having an intensity of half or more of the maximum intensity among the ultraviolet light emitted from the ultraviolet light source 2 is configured to be reflected by the first reflecting portion 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 portion 3 travels toward the second reflecting portion 4.

[0019] The second reflecting portion 4 reflects the ultraviolet light reflected by the first reflecting portion 3 as shown by the arrow of the dashed line in FIG. 2 so as to return it to the first reflecting portion 3 as shown by the arrow of the double-dashed line in FIG. 2. In this embodiment, the second reflecting portion 4 is configured separately from the first reflecting portion 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 portion 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 Figure 1, the second reflector 4 is positioned to cover the ultraviolet light source 2 from below. The second reflector 4 is formed in a concave curved shape that is recessed downwards. In this embodiment, the second reflector 4 is made of a concave mirror. That is, the second reflector 4 is formed in a parabolic shape that is open upwards. The second reflector 4 is formed symmetrically with respect to the first reflector 3, with respect to the ultraviolet light source 2.

[0021] The second reflecting section 4 is positioned with a gap in the vertical direction Z from the first reflecting section 3, and the first reflecting section 3 and the second reflecting section 4 are positioned so that their open portions face each other. As a result, an opening 111 of the air passage 11 is formed around the entire circumference between the first reflecting section 3 and the second reflecting section 4. In the cross-section of the air purification device 1 that passes through the ultraviolet light source 2 and is parallel to the vertical direction Z, it is preferable that the opening angle θ2[°] of the opening 111 centered on the ultraviolet light source 2 satisfies θ2 ≤ 180°-θ1. In this case, leakage of ultraviolet light from the opening 111 is easily suppressed.

[0022] The second reflector 4 focuses the parallel light from the first reflector 3, as indicated by the dashed arrow in Figure 2, to the focal position, as indicated by the double-dash arrow in Figure 2. In this embodiment, the focal position of the second reflector 4 is the position of the ultraviolet light source 2. However, the focal position of the second reflector 4 may be a position offset from the position of the ultraviolet light source 2. In this case, the focal position of the second reflector 4 is preferably a position that overlaps with the ultraviolet light source 2 in the vertical Z direction, for example.

[0023] The second reflecting section 4 is connected to the first reflecting section 3, although detailed illustrations are omitted. For example, by providing a connecting member connecting the first reflecting section 3 and the second reflecting section 4 outside the airflow channel 11, it is possible to prevent ultraviolet light inside the airflow channel 11 from being absorbed or reflected by the connecting member. Alternatively, the connecting member may be placed inside the airflow channel 11. In this case, the connecting member may also be used for heat dissipation and wiring.

[0024] As shown in Figure 1, the air purification device 1 of this embodiment further includes a fan 6 and a connector section 7. The fan 6 generates airflow within the air passage 11. In this embodiment, the fan 6 is positioned at one location in the opening 111. The fan 6 may be used to introduce air into the air passage 11 or to discharge air from within the air passage 11. The fan 6 is positioned so as to overlap with the ultraviolet light source 2 when viewed from the direction of the fan 6's rotation axis. 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. Furthermore, 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 ultraviolet light emitted by the ultraviolet light source 2. This suppresses the leakage of weak ultraviolet light emitted in regions outside the directional half-angle θ1 of the ultraviolet light source 2 from the aperture 111. The absorption rate of the fan 6 with respect to 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 diagram, the fan 6 is fixed to at least one of the first reflector 3 and the second reflector 4. For example, by providing a fixing member outside the airflow channel 11 to fix the fan 6 and the first reflector 3, it is prevented that ultraviolet light inside the airflow channel 11 is absorbed or reflected by the fixing member. Alternatively, the fixing member may be placed inside the airflow channel 11. The fan 6 and the ultraviolet light source 2 are powered by the connector 7.

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

[0028] (Operation and effects of the first embodiment) The air purification device 1 comprises 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 towards the first reflecting section 3, and also forms an air passage 11 between itself and the first reflecting section 3. Therefore, the ultraviolet light is reflected multiple times by the first reflecting section 3 and the second reflecting section 4, and the ultraviolet light is used efficiently for air purification. As a result, the air purification performance of the air purification device 1 is improved.

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

[0030] Furthermore, the second reflecting section 4 is formed in a concave curved shape. Therefore, the ultraviolet light reflected by the second reflecting section 4 is more easily directed towards the first reflecting section 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 purification device 1. In particular, by configuring the second reflecting section 4 with a concave mirror, the air purification performance of the air purification device 1 can be further improved.

[0031] Furthermore, the device is equipped with a fan 6 positioned at the opening 111 of the air passage 11. Therefore, the fan 6 can be installed while suppressing an increase in the size of the air purification device 1. In addition, since ultraviolet light in the air passage 11 is suppressed from irradiating the fan 6, absorption of ultraviolet light by the fan 6 and leakage of ultraviolet light from the opening 111 of the air passage 11 due to reflection by the fan 6 are suppressed. In particular, by constructing the fan 6 from a material that absorbs ultraviolet light emitted by the ultraviolet light source 2, leakage of ultraviolet light from the opening 111 of the air passage 11 can be further suppressed.

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

[0033] Furthermore, the air purification device 1 has a connector portion 7 that can be connected to a lighting equipment connection portion 101a provided on the ceiling 101 of the room 10. Since lighting equipment connection portions 101a are often already installed on the ceiling 101 of the room 10, this embodiment provides an air purification device 1 that is easy to install in the room 10.

[0034] As described above, this embodiment provides an air purification device that can enhance air purification performance.

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

[0036] This embodiment is a modified version of the first embodiment in which the configurations of the first reflector 3 and the second reflector 4 are changed.

[0037] The first reflective section 3 is formed in an elongated shape in one direction perpendicular to the vertical direction Z (hereinafter referred to as the longitudinal direction X), and its cross-sectional shape perpendicular to the longitudinal direction X is a curved shape that is concave upwards. For example, the first reflective section 3 is formed in a concave curved surface shape as if the side surface of an elongated cylinder were divided vertically into two. The direction perpendicular to both the longitudinal direction X and the vertical direction Z is referred to as the short direction Y.

[0038] Furthermore, the second reflecting section 4 is formed to be elongated in the longitudinal direction X, and its cross-sectional shape perpendicular to the longitudinal direction X is a curved shape that is concave downwards. The second reflecting section 4 is formed vertically symmetrically with respect to the first reflecting section 3, with respect to the ultraviolet light source 2.

[0039] The space between the first reflector 3 and the second reflector 4 serves as an air passage 11. The opening of the air passage 11 has two lateral openings 111a formed at both ends of the first reflector 3 and the second reflector 4 in the short direction Y, and two vertical openings 111b formed at both ends of the first reflector 3 and the second reflector 4 in the long direction X.

[0040] In this embodiment, the fan 6 is positioned in one of the vertical openings 111b. This suppresses the leakage of ultraviolet light emitted from the ultraviolet light source 2 from the vertical opening 111b. Furthermore, by positioning the fan 6 in the vertical opening 111b located at one end of the longitudinal direction X of the airflow channel 11, it is easier to introduce air into the entire airflow channel 11. The fan 6 may also be positioned in the horizontal opening 111a.

[0041] As shown in Figure 4, this embodiment has multiple ultraviolet light sources 2 (specifically, light-emitting diodes). The multiple ultraviolet light sources 2 are arranged in a line along the longitudinal direction X. The multiple ultraviolet light sources 2 are supported by a common support portion 5. The support portion 5 is formed to be elongated in the longitudinal direction X and short in the transverse direction Y.

[0042] Otherwise, it is the same as in the first embodiment. In addition, among the reference numerals used in the second embodiment and subsequent embodiments, those that are the same 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 Figures 5 and 6. Figure 5 is a partial cross-sectional view of the air purification device 1 in this embodiment. Figure 6 is a view taken along line VI in Figure 5.

[0044] This embodiment is a modified version of the first embodiment in which the configurations of the first reflector 3 and the second reflector 4 are changed.

[0045] In this embodiment, the first reflecting section 3 and the second reflecting section 4 are integrally configured with respect to each other. Specifically, the air purification device 1 in this embodiment has a spherical member 8, and different parts of the spherical member 8 constitute the first reflecting section 3 and the second reflecting section 4. The spherical member 8 is formed in a spherical shape, and an ultraviolet light source 2 is housed in the air channel 11, which is the space inside it. At least the inner surface of the spherical member 8 is made of a material that reflects ultraviolet light emitted by the ultraviolet light source 2.

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

[0047] The spherical member 8 has two openings 111 for the air passage 11. The two openings 111 are formed at the center of the spherical member 8 in the vertical direction Z, and are positioned to overlap each other in a direction perpendicular to the vertical direction Z. By providing multiple openings 111 in the spherical member 8, it is possible to form the openings 111 with the minimum necessary size, and the leakage of ultraviolet light from the inside to the outside of the spherical member 8 can be suppressed. A fan 6 is positioned in one of the openings 111.

[0048] Otherwise, it is the same as in the first embodiment.

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

[0050] This embodiment is a modified version of the first embodiment, further comprising a lighting unit 9 for illuminating the room 10. The lighting unit 9 is not particularly limited, but for example, it may have an LED element that emits visible light such as white or incandescent light. In this embodiment, the lighting unit 9 is located below the second reflecting unit 4 and is configured to illuminate the area below. The lighting unit 9 receives power from, for example, the connector unit 7. The configuration and arrangement of the lighting unit 9 are not limited to those described above, and it is sufficient as long as it can illuminate the room 10. According to this embodiment, the air purification device 1 can purify the air in the room 10 and illuminate the room 10. Otherwise, it is the same as in the first embodiment.

[0051] [Differentiation] Further modifications that the air purification device 1 may adopt will be described.

[0052] In the first to fourth embodiments, examples were described in which both the first and second reflecting portions are concave curved surfaces, but the invention is not limited to this. For example, at least one of the first and second reflecting portions may be formed in a planar shape. Also, at least one of the first and second reflecting portions may be a concave surface composed of multiple planes. From the viewpoint of facilitating the generation of multiple reflections, it is preferable that both the first and second reflecting portions are concave (particularly concave curved) surfaces, as shown in the first to fourth embodiments.

[0053] In the first to fourth embodiments, examples without filters were shown, but filters may be used. For example, a filter may be provided to surround at least a part of the opening, preferably the entire opening or the entire opening except for the part where the fan is located. This allows viruses, bacteria, etc. in the air to be captured by the filter, 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 from an ultraviolet light source. This further improves the air purification performance of the air purifier. Furthermore, by composing the filter from a material that absorbs or reflects ultraviolet light emitted from an ultraviolet light source, the leakage of ultraviolet light can be further suppressed.

[0054] Furthermore, while the first to fourth embodiments show examples using a single fan, the invention is not limited to this. For example, the fan may be omitted. For instance, if there is a circulating device in the room that circulates the indoor air, such as an air conditioner or ventilation fan, the indoor air will be circulated by this circulating device, and at the same time, the air in the air passage of the air purifier will also be circulated. Alternatively, the air purifier may be provided with multiple fans.

[0055] Furthermore, in the first to fourth embodiments, a light source that emits ultraviolet light upwards and a light source that emits ultraviolet light downwards may be used.

[0056] (Summary of the embodiments) Next, the technical concept understood from the embodiments described above will be described using the reference numerals and other symbols from the embodiments. However, the reference numerals and other symbols in the following description are not limited to the components in the claims that are specifically shown in the embodiments.

[0057] [1] A first embodiment of the present invention is an air purification 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 passage 11 between itself and the first reflecting section 3. This improves the air purification performance of the air purification device 1.

[0058] [2] A second embodiment of the present invention is that, in the first embodiment, 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 that, in the second embodiment, the first reflecting portion 3 is made of 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 that, in any one of the first to third embodiments, 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 that, in the fourth embodiment, the second reflecting portion 4 is made of a concave mirror. This improves the air purification performance of the air purification device 1.

[0062] [6] A sixth embodiment of the present invention further comprises a fan 6 located at the openings 111, 111a, 111b of the air passage 11, in any one of the first to fifth embodiments. This allows for the installation of the fan 6 while suppressing the need to increase the size of the air purification device 1.

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

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

[0065] [9] The ninth embodiment of the present invention is that, in any one of the first to eighth embodiments, it further comprises a connector portion 7 that can be connected to a lighting equipment connection portion 101a provided on the ceiling 101 of the room 10. This makes it possible to provide an air purification device 1 that is easy to install in a room 10.

[0066]

[10] A tenth embodiment of the present invention is the ninth embodiment, further comprising a lighting unit 9 for illuminating the room 10. This allows the air purifier 1 to purify the air in the room 10 and also illuminate the room 10.

[0067] (Note) Although embodiments of the present invention have been described above, the embodiments described herein do not limit the invention as defined in the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are necessarily essential for solving the problem of the invention. Moreover, the present invention can be implemented with appropriate modifications without departing from its spirit. [Explanation of Symbols]

[0068] 1…Air purification device 10…Indoor 101… Ceiling 101a...Lighting equipment connection section 11…Airflow channel 111…Opening 111a…Side opening 111b... Vertical opening 2...Ultraviolet light source 3...1st reflection section 4…Second reflection section 6…fan 7…Connector section 9…Lighting Department

Claims

1. A UV light source that emits ultraviolet light, A first reflecting part that reflects ultraviolet light emitted from the aforementioned ultraviolet light source, The second reflecting part reflects ultraviolet light emitted from the ultraviolet light source and reflected by the first reflecting part toward the first reflecting part, and also forms an air passage between itself and the first reflecting part. The first reflective section is composed of a concave mirror that follows the surface of a sphere. Air purification device.

2. The second reflective portion is formed in a concave curved shape. The air purification device according to claim 1.

3. The second reflective section is composed of a concave mirror that follows the surface of a sphere. The air purification device according to claim 2.

4. The air passage further comprises a fan positioned at the opening of the aforementioned air passage. The air purification device according to claim 1 or 2.

5. The fan is made of a material that absorbs ultraviolet light emitted by the ultraviolet light source. The air purification device according to claim 4.

6. The ultraviolet light source is a light-emitting diode, The first reflective portion is formed in a region wider than the region within the directional half-angle of the ultraviolet light source. The air purification device according to claim 1 or 2.

7. It further has a connector that can be connected to a lighting fixture connection point installed on the ceiling of the room. The air purification device according to claim 1 or 2.

8. The aforementioned interior further includes a lighting unit for illuminating the interior. The air purification device according to claim 7.

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