Air disinfection device

Abstract

The present invention relates to an air disinfection device. The air disinfection device includes a reflector, a first LED light source, and a second LED light source. The reflector may include: a main body portion having a cylindrical shape, the main body portion having an empty space therein and having openings formed in its upper and lower surfaces; a first rotating body, the first rotating body being connected to the lower surface of the main body portion and being shaped to have an empty space therein; and a second rotating body, the second rotating body being connected to the upper surface of the main body portion and being shaped to have an empty space therein. The first LED light source may emit UV-C rays in a direction from the first rotating body to the main body portion; the second LED light source may emit UV-C rays in a direction from the second rotating body to the main body portion; and the reflector may reflect light emitted from the first LED light source and light emitted from the second LED light source.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0000941 filed in the Korean Intellectual Property Office on January 5, 2021, and Korean Patent Application No. 10-2021-0075606 filed in the Korean Intellectual Property Office on June 10, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The invention relates to an air disinfecting device. Background Art

[0004] Most of the air cleaners in the related art are equipped with H11 HEPA filters (high efficiency air filters) and purify the air. The H11 HEPA filter is based on a particle size of 0.3 μm and has a dust collection efficiency of 95%. However, since the size of the coronavirus that has recently spread around the world is 0.08 μm to 0.1 μm, which is smaller than the standard dust collection size of the HEPA filter, the coronavirus may pass through the HEPA filter. In other words, the virus cannot be blocked by the HEPA filter alone.

[0005] Disinfection methods in related art have been implemented by catalyst reaction or ozone reaction. However, since it is difficult to ensure uniformity within the effective disinfection area only by catalyst reaction, there may be viruses that pass through the effective disinfection area without being disinfected. Ozone reaction is not suitable for daily life due to the harmfulness of its components.

[0006] Ultraviolet (UV) lamps can more reliably ensure disinfection effects, but technologies related to UV lamps are rejected because UV lamps contain harmful substances such as mercury in their manufacturing process. Some products use UV LED light sources for disinfection, but UV LED light sources are still not enough to achieve the natural purpose of air disinfection.

[0007] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention

[0008] The present invention aims to provide an air disinfection device that can provide a disinfection force sufficient to remove harmful microorganisms and coronaviruses.

[0009] An exemplary embodiment of the present invention provides an air disinfection device, including a reflector, a first LED light source, and a second LED light source. The reflector may include: a main body portion having a cylindrical shape, the main body portion having an empty space therein and having openings formed in its upper and lower surfaces; a first rotating body, the first rotating body being connected to the lower surface of the main body portion and being shaped to have an empty space therein; and a second rotating body, the second rotating body being connected to the upper surface of the main body portion and being shaped to have an empty space therein. The first LED light source may emit UV-C rays in a direction from the first rotating body to the main body portion; the second LED light source may emit UV-C rays in a direction from the second rotating body to the main body portion; and the reflector may reflect light emitted from the first LED light source and light emitted from the second LED light source.

[0010] The first rotating body may have a first opening facing an opening through which the first rotating body and a lower surface of the main body portion are connected, and the first LED light source may be positioned corresponding to the first opening.

[0011] The second rotating body may have a second opening facing an opening through which the second rotating body and an upper surface of the main body portion are connected, and the second LED light source may be positioned corresponding to the second opening.

[0012] The length of the main body portion in the extending direction and the radius of the main body portion may be set so that the residence time of the air in the air disinfecting device is equal to or longer than a predetermined disinfection time.

[0013] The length of the main body portion in the extending direction and the radius of the main body portion may be set so that the minimum illumination required to ensure a predetermined sterilizing force can be provided to the air sterilizing device.

[0014] The scheduled disinfection time can be 0.07 seconds and the minimum illumination can be 43mW / cm 2 The length of the main body portion in the extension direction may be 80 mm to 120 mm, and the radius of the main body portion may be 25 mm to 35 mm.

[0015] A length of the first rotating body in the same direction as the extending direction of the main body portion may be 5% to 15% of a length of the main body portion in the extending direction.

[0016] The length of the second rotating body in the same direction as the extending direction of the main body portion may be 5% to 15% of the length of the main body portion in the extending direction.

[0017] An inclined surface between the first opening of the first rotating body and an opening connected to the lower surface of the body portion and facing the first opening may have an inclination angle of 35 to 55 degrees relative to the lower surface of the body portion.

[0018] An inclined surface between the second opening of the second rotating body and an opening connected to the upper surface of the body portion and facing the second opening may have an inclination angle of 35 to 55 degrees relative to the upper surface of the body portion.

[0019] The air disinfecting device may further include a first heat sink coupled to the first LED light source; and a second heat sink coupled to the second LED light source.

[0020] The air disinfection device may further include a fan located at a lower portion of the first rotating body and configured to introduce air, wherein the air introduced by the fan is introduced into the reflector through the first radiator, passes through the main body, and is discharged to the outside of the reflector through the second radiator.

[0021] Another exemplary embodiment of the present invention provides an air disinfection device, including: a reflector, the reflector is implemented to have a shape formed by coupling a main body with a first rotating body and a second rotating body coupled to two opposite surfaces of the main body, wherein the main body has an empty space therein, the first rotating body and the second rotating body each have an empty space therein, the first rotating body includes a surface connected to one of the two opposite surfaces of the main body, and the second rotating body includes a surface connected to the other of the two opposite surfaces of the main body. The air disinfection device may include: a first LED light source, the first LED light source is positioned corresponding to a first opening facing one surface of the first rotating body, and is configured to emit UV-C rays into the reflector; and a second LED light source, the second LED light source is positioned corresponding to a second opening facing one surface of the second rotating body, and is configured to emit UV-C rays into the reflector.

[0022] A third opening facing the first opening may be formed in one surface of the first rotating body, and a fourth opening facing the second opening may be formed in one surface of the second rotating body.

[0023] The first LED light source may be located between the first opening and the third opening, and the second LED light source may be located between the second opening and the fourth opening.

[0024] According to the air state, the first LED light source and the second LED light source may be turned on at the same time, or only one of the first LED light source and the second LED light source may be turned on.

[0025] The first LED light source and the second LED light source may be alternately turned off and on.

[0026] The present invention provides an air disinfection device capable of providing a disinfection force sufficient to remove harmful microorganisms and coronaviruses. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a view schematically showing an air sterilizing device according to an embodiment.

[0028] Figure 2 is a view schematically showing an air cleaning system according to an embodiment.

[0029] Figure 3 is a view showing an air cleaner according to an embodiment.

[0030] Figure 4 is a view showing air flows introduced and exhausted by the air cleaner.

[0031] Figure 5 1 is a view showing the air cleaner cut in half and opened with respect to the AA' axis.

[0032] Figure 6 and Figure 7 It is shown Figure 5 View of the upper connection part in right cross section.

[0033] Figure 8 It is shown Figure 5 View of the upper connection part in left cross section.

[0034] Fig. 9 is a cross-sectional view taken along line BB' and showing an upper structure of the air cleaner.

[0035] Fig.10 is a view showing a heat sink coupled to an upper coupling portion of an air cleaner when viewed from bottom to top in the z-axis direction.

[0036] Fig.11 is a perspective view showing a state in which an upper coupling portion of an air cleaner, a heat sink, and an LED light source are coupled when viewed from below.

[0037] Fig.12 is a view showing the air flow in the radiator.

[0038] Fig.13 is a view showing the air flow in the upper coupling portion.

[0039] Fig.14 is a view schematically showing illuminance values ​​in a cross section perpendicular to a longitudinal direction of a reflector according to an embodiment. DETAILED DESCRIPTION

[0040] The present invention relates to an air disinfection device using a UV LED light source and a reflector. Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. The same or similar constituent elements are given the same or similar reference numerals, and repeated descriptions thereof will be omitted. The suffixes "module", "unit", "part" and / or "section" used to describe the constituent elements in the following description are used together or interchangeably for ease of description, but the suffixes themselves have no distinguishable meaning or function. In addition, in the description of the exemplary embodiments disclosed in this specification, when it is determined that a specific description of a known related art may obscure the subject matter of the exemplary embodiments disclosed in this specification, these specific descriptions will be omitted. In addition, it should be understood that the drawings are provided only to make it easy for those skilled in the art to understand the exemplary embodiments disclosed in this specification, and the technical spirit disclosed in this specification is not limited by the drawings, and includes all modifications, equivalents and substitutes contained in the spirit and technical scope of the present invention.

[0041] Terms including ordinal numbers (such as "first", "second", etc.) may be used to describe various constituent elements, but the constituent elements are not limited by these terms. These terms are only used to distinguish one constituent element from another constituent element.

[0042] When a component is described as being "coupled" or "connected" to another component, it should be understood that the component may be directly coupled or connected to another component, and that intermediate components may exist between the components. When a component is described as being "directly coupled to" or "directly connected to" another component, it should be understood that there are no intermediate components between the components.

[0043] In the present application, it should be understood that the terms "including" and "having" are intended to specify the existence of the features, quantities, steps, operations, constituent elements, and parts or a combination thereof described in the specification, and do not exclude the possibility of pre-existing or adding one or more other features, quantities, steps, operations, constituent elements, and parts or a combination thereof.

[0044] Embodiments of the present invention relate to air disinfection devices. For example, the air disinfection device includes an LED light source installed in an air cleaner and configured to emit UV-C rays with a wavelength band of 100nm to 280nm, instead of performing a catalyst or ozone reaction in the related art. The air passing through the inside of the air cleaner is directly irradiated by ultraviolet rays emitted by the UV-C LED light source, so that the DNA or biological tissues of viruses, bacteria and other harmful microorganisms contained in the air are destroyed and inactivated, thereby maintaining the health of the user. The air disinfection device can be used by being installed in an air cleaner or other small portable products. For example, a small air disinfection module can be manufactured and sized to be installed in a small or portable product (such as an air cleaner, an AI speaker, a plant pot, a bucket, etc.), and provide an air disinfection function.

[0045] Figure 1 is a view schematically showing an air sterilizing device according to an embodiment.

[0046] like Figure 1 As shown, the air disinfection device 200 includes two LED light sources 201 and 202 and a reflector 203 . Figure 1 The reflector 203 shown includes a first rotating body 204, a second rotating body 205 and a main body 206, wherein the main body 206 is an effective disinfection area between the first rotating body 204 and the second rotating body 205. The reflector 203 defines the internal space of the air disinfection device 200. Figure 1 As shown, UV-C rays are reflected in the interior space, thereby providing a disinfecting effect.

[0047] exist Figure 1 In the embodiment, the two LED light sources 201 and 202 can each be implemented as a UV-C LED light source, which generates an output of 10mW or more for air disinfection. The two LED light sources 201 and 202 are arranged at two opposite ends of the reflector 203 to face each other. As described above, in order to achieve air disinfection, the air disinfection device 200 according to the present embodiment includes a reflector 203, and two UV-C LED light sources 201 and 202 arranged in the reflector 203 facing each other.

[0048] Reflector 203 can be made of aluminum that can effectively reflect ultraviolet rays. Reflector 203 can be made of materials that are not perfect absorbers, such as stainless steel (stainless steel (SUS)), aluminum, Teflon (Teflon), etc.). Considering cost and UV-C reflectivity, aluminum may be effective. The reflector changes the direction of light so that the light leaving the LED light sources 201 and 202 enters the air disinfection device 200 again to apply UV-C rays to the disinfection function, thereby improving the disinfection power.

[0049] The UV-C LED light sources 201 and 202 generate an output of at least 10mW or more to ensure sufficient disinfection effect. The UV-C LED light sources 201 and 202 are respectively located at one of the two opposite ends of the effective disinfection area in the reflector 203. The two UV-C LED light sources 201 and 202 are respectively located at positions corresponding to the two opposite ends of the effective disinfection area in the reflector 203, and are arranged to face each other. The device for fixing the UV-C LED light sources 201 and 202 supports and fixes the UV-C LED light sources. Wires and temperature sensors for measuring temperature can be provided on the device for fixing the UV-C LED light sources 201 and 202. For example, the temperature sensor located on the device measures the temperature of the surface of the reflector 203. By applying a regression equation to the measured temperature of the reflector surface, the temperature of the UV-C LED light sources 201 and 202 can be calculated and inferred.

[0050] According to the user's manipulation or the distribution density of the disinfection targets distributed in the air, the two LED light sources 201 and 202 may be operated simultaneously or alternately, or only a single LED light source may be operated.

[0051] For example, in the case where the air state measured by the dust sensor is very problematic and the maximum disinfection force needs to be ensured, two LED light sources 201 and 202 can be turned on at the same time. When the air state is good, one LED light source can be turned on and the other LED light source can be turned off, thereby minimizing power consumption. Alternatively, starting from the state of turning on the first LED light source and turning off the second LED light source, the first LED light source can be turned off and the second LED light source can be turned on, or the operation in the reverse order can be repeatedly performed, thereby minimizing the load applied to the LED light source and minimizing the heat generated from the LED light source. A direct current (DC) voltage can be supplied to the LED light source to turn on the LED light source. Alternatively, a pulse voltage can be supplied to the LED light source so that the LED light source can be repeatedly turned on and off.

[0052] The reflector 203 effectively disperses the ultraviolet rays generated therein instead of the light provided from the outside, and no part is missed. The ultraviolet rays generated by the UV-C LED light source are reflected by the reflector 203, so that the inside of the reflector 203 is densely filled with ultraviolet rays without missing any part. Therefore, the critical dose or more ultraviolet intensity required for disinfection can be ensured in the reflector 203. In addition, the two UV-C LED light sources arranged to face each other can ensure the uniformity of the ultraviolet intensity in the effective disinfection area in the reflector 203.

[0053] Reflector 203 can be realized by connecting main body 206 and first rotating body 204 and second rotating body 205. Main body 206 is provided in the form of a cylinder or polyhedral column with an empty space therein, and first rotating body 204 and second rotating body 205 are arranged at two opposite ends of main body 206 and each have an empty space therein. The upper side of each of first rotating body 204 and second rotating body 205 can be opened, and the upper side is positioned toward the outside of air disinfection device. The first rotating body 204 and second rotating body 205 each have a shape of decapping in a direction perpendicular to the axial direction of the cone at its specific position. Alternatively, the first rotating body 204 and second rotating body 205 can each have a shape formed by rotating an isosceles trapezoid around the center line connecting the upper center and the lower center of the isosceles trapezoid. Therefore, the side surface (hereinafter referred to as "inclined surface") of each of first rotating body 204 and second rotating body 205 is inclined at a specific angle relative to a reference plane (e.g., the upper surface or lower surface of the main body). Hereinafter, the angle at which the side surfaces of the first rotating body 204 and the second rotating body 205 are inclined is referred to as an "inclination angle". Air is introduced into the reflector 203 through an opening of one of the first rotating body 204 and the second rotating body 205, and is discharged to the outside through an opening of the other of the first rotating body 204 and the second rotating body 205. The interior of the reflector 203 may be made of a material capable of reflecting ultraviolet rays, and the ratio between the lengths B2 and B3 of the rotating body and the length B1 of the main body may be calculated based on the field of view (FOV) of the LED light source. The ultraviolet rays emitted by the LED light source may be effectively dispersed according to the ratio, thereby ensuring the disinfection force and uniformity for the target. The inclination angle is defined as an angle within a predetermined range based on the FOV of the LED light source, so that the backscattered ultraviolet component may be reflected and returned to the effective disinfection area.

[0054] Figure 2 is a view schematically showing an air cleaning system according to an embodiment.

[0055] like Figure 2 As shown, multiple air disinfection devices are arranged to provide large-scale air disinfection.

[0056] Figure 3 is a view showing an air cleaner according to an embodiment.

[0057] Figure 3 1 is a view showing the inside of the air cleaner 1 by cutting a predetermined portion of the air cleaner 1 to clearly explain the structure of the air sterilizing device 10 .

[0058] The air disinfection device 10 includes a reflector 100, heat sinks 110 and 130, and LED light sources 120 and 140. The reflector 100 includes a first rotating body 101, a first opening 102, a main body 103, a second rotating body 104, and a second opening 105. The first rotating body 101, the main body 103, and the second rotating body 104 can each be made of aluminum having a reflective function.

[0059] The main body part 103 has a cylindrical shape, and the main body part 103 has an empty space therein and openings formed in its upper and lower surfaces. Generally, the upper and lower surfaces of the main body part 103 may each include an opening area, which is the entire area except the edge area defined by the thickness of the side surface of the main body part 103. The first rotating body 101 has a first opening 102, and the first rotating body 101 includes an upper surface connected to the lower surface of the main body part 103 and in contact with the lower surface. The upper surface of the first rotating body 101 may have an opening 191, which is the entire area except the edge area defined by the thickness of the inclined surface of the first rotating body 101. The second rotating body 104 has a second opening 105, and the second rotating body 104 includes a lower surface connected to the upper surface of the main body part 103 and in contact with the upper surface. The lower surface of the second rotating body 104 may include an opening 192, which is the entire area except the edge area defined by the thickness of the inclined surface of the second rotating body 104.

[0060] like Figure 3 As shown, the air cleaner 1 includes an air disinfection device 10 and a housing 2 for accommodating the air disinfection device 10. The housing 2 may include an air intake portion 20, a lower coupling portion 30, a main body cover portion 40, and an upper coupling portion 50. The lower coupling portion 30 is coupled to the first rotating body 101 by a fastening device, and fixes and supports the reflector 100. The upper coupling portion 50 is coupled to the second rotating body 104 by a fastening device, and fixes and supports the reflector 100. The main body cover portion 40 is arranged between the upper coupling portion 50 and the lower coupling portion 30, and surrounds the main body 103 of the reflector 100. The housing 2 has a cylindrical shape as a whole, but the present invention is not limited thereto. The air disinfection device has a shape including a cylinder, so the housing 2 has a cylindrical shape as a whole. However, when the air disinfection device has a polyhedral column shape, the main body cover portion 40 of the housing 2 may at least have a polyhedral column shape. The air intake portion (lower structure) 20 may have a cylindrical shape having a plurality of holes through which external air is introduced. The upper surface of the air intake portion (lower structure) 20 has a circular opening 21, a fan 60 is located in the circular opening 21, and the fan 60 is coupled to the lower end of the circular opening 21. External air is introduced by the fan 60 and flows upward.

[0061] The LED light source 120 coupled to the heat sink 110 is located in a first opening 102 formed in a lower surface of a first rotating body 101 located at one end of the reflector 100. The LED light source 140 coupled to the heat sink 130 is located in a second opening 105 formed in an upper surface of a second rotating body 104 located at the other end of the reflector 100. One side of the LED light source 120 radiating light may be located within a region defined by a length B2 of the first rotating body 101, and one side of the LED light source 140 radiating light may be located within a region defined by a length B3 of the second rotating body 104.

[0062] The air introduced by the fan 60 is introduced into the reflector 100 through the heat sink 110, passes through the body portion 103, and is discharged to the outside of the reflector 100 through the heat sink 130. A plurality of exhaust ports are formed in the upper surface of the upper coupling portion 50 located at the upper side of the reflector 100 so that the air can be discharged through the plurality of exhaust ports. Figure 3 The discharge ports shown are all provided in the form of circular bands, but the invention is not limited to this example.

[0063] Figure 4 is a view showing air flows introduced and exhausted by the air cleaner.

[0064] Figure 5 1 is a view showing the air cleaner cut in half and opened with respect to the AA' axis.

[0065] Figure 6 and Figure 7 It is shown Figure 5 View of the upper connection part in right cross section.

[0066] Figure 8 It is shown Figure 5 View of the upper connection part in left cross section.

[0067] like Figure 6 and Figure 7 As shown, the cap 51 is a part of the upper coupling portion 50, and the cap 51 is inclined at an angle corresponding to the second rotating body 104. h1 represents the length of the connecting portion 106 of the second rotating body 104 connected to the connecting portion 511 of the cap 51 by the fastening device. h1 can be set to be equal to the length d2 of the second rotating body 104 in the z-axis direction. h2 represents the length of the connecting portion 511 extending downward from the lower surface of the cap 51 in the z-axis direction, and can be set to the length of the cap 51 in the z-axis direction.

[0068] h1 and h2 are fixed. The lengths of the bridges 131 and 132 of the heat sink 130 in the z-axis direction are determined according to the position of the light emitting surface of the LED light source 140. For example, the light emitting portion of the LED light source 140 may be located within a range of a distance d2 from the line L1 to the line L2. Thus, the difference between the minimum and maximum values ​​of the length h3 of the bridge 131 in the z-axis direction may be d2. Figure 6 In FIG. 1 , the light emitting portion of the LED light source 140 is located adjacent to the line L1. Figure 7 In FIG. 1 , the light emitting portion of the LED light source 140 is located adjacent to the line L2. Figure 6 The length h3 of the bridge portion 131 in the z-axis direction shown in FIG. Figure 7 The difference between the length h3′ of the bridge portion 131 in the z-axis direction shown in FIG. Figure 6 The position of the light emitting portion of the LED light source 140 shown in FIG. Figure 7 The difference between the positions of the light emitting portions of the LED light sources 140 shown in FIG.

[0069] Furthermore, in the air sterilizing device 10 , positions of the two heat sinks 110 and 130 , positions of the two LED light sources 120 and 140 , and positions of the first rotating body 101 and the second rotating body 104 may be symmetrical with respect to the center of the air sterilizing device 10 .

[0070] In addition, Figure 5 , Figure 6 and Figure 7 In the embodiment, a ratio between a length d1 of the main body portion 103 in the z-axis direction and a length d2 of the second rotating body 104 in the z-axis direction may be set to approximately 10:1.

[0071] Fig. 9 is a cross-sectional view taken along line BB' and showing an upper structure of the air cleaner.

[0072] Fig.10 is a view showing a heat sink coupled to an upper coupling portion of an air cleaner when viewed from bottom to top in the z-axis direction.

[0073] like Fig.10 As shown, three bridge portions 131, 132 and 133 extending from the main body of the heat sink 130 are partially located at three connecting portions (i.e., Figure 7 511 and 512 in Figure 8 513) and three connecting parts 106, 107 and 108 extending upward along the z-axis direction from the upper surface of the second rotating body 104. The connecting part of the cap 51, the bridge part and the connecting part of the second rotating body 104 are connected and fixed by fastening means (such as screws).

[0074] The coupling structure between the lower coupling portion 30 and the first rotating body 101 is similar to the above-described coupling structure between the upper coupling portion 50 and the second rotating body 104 .

[0075] Fig.11 is a perspective view showing a state in which an upper coupling portion of an air cleaner, a heat sink, and an LED light source are coupled when viewed from below.

[0076] Fig.12 is a view showing the air flow in the radiator.

[0077] like Fig.12 As shown, the heat sink 130 has a plurality of fins (eg, 135 ) extending from a lower structure 134 in the z-axis direction. Thus, wind passes through the heat sink 130 in all directions, thereby promoting cooling. In addition, bridges 131 , 132 , and 133 extend from the lower structure 134 .

[0078] Fig.13 is a view showing the air flow in the upper coupling portion.

[0079] like Fig.13 As shown, it can be seen that the air discharged to the portion between the second rotating body 104 and the radiator 130 is cooled by flowing into the radiator 130 .

[0080] The present invention can be used to establish a disinfection system that can directly disinfect the air and substantially remove coronaviruses and other harmful microorganisms. The air disinfection device can be installed in an air cleaner of the related art to develop a product that can remove fine dust and viruses at the same time. Alternatively, using the advantages of a small air disinfection device according to the present invention, the air disinfection device can be installed in an air cleaner even if the product is not used for disinfection purposes. For example, the module can be installed in a predetermined space inside or outside a plant pot arranged for interior design purposes, thereby obtaining an air disinfection effect.

[0081] Viruses such as COVID-19 can be sterilized with a smaller dose than E. coli. 1.89 doses are required for 99.99% sterilization of E. coli. However, in the case of COVID-19, 99.9% sterilization can be achieved at a level of 50% of the sterilization power of E. coli. It is necessary to ensure 3 doses or more of sterilization power to prevent possible future airborne viral infections other than COVID-19.

[0082] This embodiment can provide a small air disinfection device, which can instantly provide 3 doses of disinfection power. To this end, it is necessary to optimize the design of the LED light source and reflector structure of the air disinfection device. The following examples are provided to explain the present invention, but do not limit the scope of protection of the present invention.

[0083] When the length B1 of the main body portion corresponding to the length of the air disinfection device is reduced to miniaturize the air disinfection device, miniaturization can be achieved, but the distance between the LED light sources is reduced. In this case, the heat generated by one LED light source affects the other LED light source, thereby affecting the durability and reliability of the LED light source. In this case, the output of the LED light source is reduced, which may lead to a reduction in disinfection power and deterioration in the performance of the air disinfection device.

[0084] In addition, by reducing the diameter of the air disinfection device ( Figure 1 B11 or B12 in (B ...

[0085] In the following description, various examples of air disinfection devices will be described, which can minimize the size of the air disinfection device while satisfying 99.9% disinfection power. For example, in order to provide the following function: 99.9% disinfection is performed when air passes through the air disinfection device 200 once, the air disinfection device 200 can be designed to meet the following conditions: the minimum residence time of the air is 0.07 seconds and the minimum illumination in the air disinfection device 200 is 43mW / cm 2 The residence time refers to the time for air to be introduced from one side of the air disinfection device 200 and discharged from the other side of the air disinfection device 200 under an ideal equilibrium state. In other words, the residence time refers to the time for air to pass through the interior of the air disinfection device 200. The minimum residence time can be set to 0.07 seconds. The minimum illumination means the minimum illumination with respect to the light intensity emitted per unit area in the air disinfection device 200. The critical value of the minimum illumination can be 43mW / cm 2 The minimum dose can be set to 3 mJ, which is calculated by multiplying the minimum dwell time by the critical value of the minimum illumination (0.07 seconds * 43 mW / cm 2 ) When the minimum residence time increases or the minimum illumination increases, the disinfection power can be improved with the increase of the minimum illumination.

[0086] The residence time and minimum illumination values ​​can be derived from flow analysis and optical simulation.

[0087] Table 1 shows the lengths B1 and 1 / 2 of B11 and B12 that satisfy the minimum residence time of 0.07 seconds.

[0088] [Table 1]

[0089]

[0090] However, in Table 1, when the length B1 of the main part is short (e.g., shorter than 80mm), the distance between the two LED light sources 201 and 202 as the light source is too short. Therefore, the two LED light sources 201 and 202 affect each other in terms of the reliability and durability of the light source. This may cause the disinfection force to deteriorate. In addition, in order to miniaturize the air disinfection device 200, the length B1 of the main part is set to 120mm or less, and the radius of the main part (1 / 2 of B11 and B12) is set to 35mm or less. Therefore, with reference to Table 1, in order to meet miniaturization and minimum residence time, the length B1 of the main part can be designed in the range of 80mm to 120mm, and the radius (1 / 2 of B11 and B12) can be designed in the range of 25mm to 35mm.

[0091] Table 2 shows the minimum illumination and dosage in the air disinfection device 200 under the structural conditions of the air disinfection device shown in Table 1.

[0092] [Table 2]

[0093]

[0094] As can be seen from Table 2, when the length B1 of the main part is 60 mm and the radius of the air disinfection device (1 / 2 of B11 and B12) is 35 mm, the reference minimum dose is met. When the length B1 of the main part is 70 mm and the radius of the air disinfection device (1 / 2 of B11 and B12) is in the range of 30 mm to 35 mm, the reference minimum dose is met. When the length B1 of the main part is 80 mm to 120 mm and the radius of the air disinfection device (1 / 2 of B11 and B12) is in the range of 20 mm to 35 mm, the reference minimum dose is met.

[0095] Therefore, it can be seen that the design conditions of the minimum illumination and the minimum stay condition described with reference to Table 1 are also met.

[0096] The rotating bodies 204 and 205 are used to reflect the light emitted from the LED light sources 201 and 202 and transmit the light to the reflector 203. The light reflected by the rotating bodies 204 and 205 can be used for disinfection.

[0097] The shape of each of the rotating bodies 204 and 205 is related to the residence time of air in the internal space of the reflector 203. For example, the length B3 of the rotating body 204 and the length B2 of the rotating body 205 and the inclination angles of the rotating bodies 204 and 205 need to be designed not to reduce the residence time.

[0098] For example, each of the length B3 of the rotating body 204 and the length B2 of the rotating body 205 can be appropriately designed to have a length of 10% of the length B1 of the main body portion. In order to cope with assembly errors and changes in the dwell time due to assembly errors, each of the length B3 of the rotating body 204 and the length B2 of the rotating body 205 can be designed within a range of 5% to 15% of the length B1 of the main body portion.

[0099] In addition, the inclination angle θ needs to be designed to have a value greater than 0 degrees. Considering the change in the residence time according to the inclination angle θ of each of the rotating bodies 204 and 205, the inclination angle θ may be designed to ensure the minimum residence time. Considering the probability that the light is used for disinfection in the reflector 203, the inclination angle θ may be designed to be 45 degrees. The light emitted from the LED light sources 201 and 202 is reflected by the inclined surfaces of the rotating bodies 204 and 205, so that the direction vector of the light can be changed to the direction vector of the light perpendicular to the optical axis. The optical axis is Figure 1 . Therefore, among the light beams emitted from the LED light sources 201 and 202, the number of light beams reflected by the inclined surfaces of the rotating bodies 204 and 205 and introduced into the reflector 203 increases. The light beam entering the reflector 203 can be used for disinfection. The tilt angle θ can be designed to have a margin of + / - 10 degrees relative to the 45-degree angle to correct assembly tolerance and system.

[0100] In this embodiment, the inclination angle is described as 45 degrees, but the present invention is not limited thereto. The inclination angle may vary according to the structure of the reflector 203, the lengths B2 and B3 of the rotating body, the length B1 of the main body, etc. The light emitted from the LED light source may be directly used for disinfection in the reflector 203, and the light radiated from the LED light source may be reflected by the rotating body, thereby being used for disinfection. The inclination angle of the rotating body may be set to maximize the degree of contribution of the light emitted from the LED light source to disinfection by reflection.

[0101] Fig.14 is a view schematically showing illuminance values ​​in a cross section perpendicular to a longitudinal direction of a reflector according to an embodiment.

[0102] when Fig.14 When the illuminance value shown is multiplied by the residence time in the reflector 203, the outermost portion of the reflector 203 ( Fig.14 The illumination at the outermost edge of the circular area shown is 40 mW / cm 2 The residence time in the reflector 203 according to the present embodiment (calculated according to flow analysis) is about 0.1208 seconds. Therefore, the approximate dose at the outermost periphery of the reflector 203 is 4.9529 [doses]. Fig.14The illuminance value schematically shows that it is the illuminance value when the inclination angle of the rotating body in the reflector 203 is 45 degrees, the length of the main body is 120 mm, and the length of the rotating body is 12 mm. The length of the rotating body corresponds to 10% of the length of the main body.

[0103] Although the embodiments of the present invention have been described in detail above, the protection scope of the present invention is not limited thereto, and those skilled in the art may make various changes and modifications, and these changes and modifications belong to the protection scope of the present invention.

[0104] <Description of Reference Numerals>

[0105] 1: Air cleaner

[0106] 10.200: Air disinfection device

Claims

1. An air disinfection device, comprising: A reflector comprising: a main body portion having a cylindrical shape, the main body portion having an empty space therein and having openings formed in an upper surface and a lower surface thereof; a first rotating body connected to the lower surface of the main body portion and shaped to have an empty space therein; and a second rotating body connected to the upper surface of the main body portion and shaped to have an empty space therein; a first LED light source configured to emit UV-C rays in a direction from the first rotating body to the main body portion; and a second LED light source configured to emit UV-C rays in a direction from the second rotating body to the main body portion, wherein the reflector reflects light emitted from the first LED light source and light emitted from the second LED light source, wherein the first rotating body has a first opening, the first opening faces an opening through which the first rotating body and the lower surface of the main body portion are connected, and the first LED light source is positioned corresponding to the first opening, and, wherein the second rotating body has a second opening, the second opening faces an opening through which the second rotating body and the upper surface of the main body portion are connected, and the second LED light source is positioned corresponding to the second opening, wherein the length of the main body portion in the extension direction and the radius of the main body portion are set so that the residence time of the air in the air disinfection device is equal to or longer than the predetermined disinfection time, and Wherein, the first rotating body and the second rotating body each have a shape that is truncated at a specific position thereof in a direction perpendicular to the axial direction of the cone, and the side surface of each of the first rotating body and the second rotating body is inclined at a specific angle relative to the upper surface and the lower surface of the main body part, respectively.

2. The air disinfection device according to claim 1, wherein: The length of the main body portion in the extending direction and the radius of the main body portion are set so as to provide the air sterilizing device with a minimum illumination required to ensure a predetermined sterilizing force.

3. The air disinfection device according to claim 2, wherein: The predetermined disinfection time is 0.07 seconds, and the minimum illumination is 43 mW / cm 2 , The length of the main body portion in the extending direction is 80 mm to 120 mm, and The radius of the main body portion is 25 mm to 35 mm.

4. The air disinfection device according to claim 1, wherein: The length of the first rotating body in the same direction as the extending direction of the main body portion is 5% to 15% of the length of the main body portion in the extending direction.

5. The air disinfection device according to claim 1, wherein: The length of the second rotating body in the same direction as the extending direction of the main body portion is 5% to 15% of the length of the main body portion in the extending direction.

6. The air disinfection device according to claim 1, wherein: An inclined surface between the first opening of the first rotating body and an opening connected to the lower surface of the main body portion and facing the first opening has an inclination angle of 35 to 55 degrees relative to the lower surface of the main body portion.

7. The air disinfection device according to claim 1, wherein: An inclined surface between the second opening of the second rotating body and an opening connected to the upper surface of the main body portion and facing the second opening has an inclination angle of 35 to 55 degrees relative to the upper surface of the main body portion.

8. The air disinfection device according to claim 1, further comprising: a first heat sink coupled to the first LED light source; and a second heat sink coupled to the second LED light source.

9. The air disinfection device according to claim 8, further comprising: a fan located at a lower portion of the first rotating body and configured to introduce air, The air introduced by the fan is introduced into the reflector through the first heat sink, passes through the main body portion, and is discharged to the outside of the reflector through the second heat sink.

10. An air disinfection device comprising: a reflector implemented to have a shape formed by coupling a main body portion with a first rotating body and a second rotating body coupled to two opposing surfaces of the main body portion, wherein the main body portion has an empty space therein, the first rotating body and the second rotating body each have an empty space therein, the first rotating body includes a surface coupled to one of the two opposing surfaces of the main body portion, and the second rotating body includes a surface coupled to the other of the two opposing surfaces of the main body portion; a first LED light source, the first LED light source being positioned corresponding to a first opening facing one surface of the first rotating body and configured to emit UV-C rays into the reflector; and a second LED light source, the second LED light source being positioned corresponding to a second opening facing a surface of the second rotating body and being configured to emit UV-C radiation into the reflector, wherein a third opening facing the first opening is formed in one surface of the first rotating body, and a fourth opening facing the second opening is formed in one surface of the second rotating body, and Wherein, the first LED light source is located between the first opening and the third opening, and the second LED light source is located between the second opening and the fourth opening. wherein the length of the main body portion in the extension direction and the radius of the main body portion are set so that the residence time of the air in the air disinfection device is equal to or longer than the predetermined disinfection time, and Wherein, the first rotating body and the second rotating body each have a shape that is truncated at a specific position thereof in a direction perpendicular to the axial direction of the cone, and the side surface of each of the first rotating body and the second rotating body is inclined at a specific angle relative to the upper surface and the lower surface of the main body part, respectively.

11. The air disinfection device according to claim 10, wherein: According to air conditions, the first LED light source and the second LED light source are turned on simultaneously, or only one of the first LED light source and the second LED light source is turned on.

12. The air disinfection device according to claim 10, wherein: The first LED light source and the second LED light source are alternately turned off and on.

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