Air disinfection device

Abstract

An air sterilization device includes a housing, a porous wheel, a fan and a sterilization module. The housing has an air inlet and an air outlet. The fan is arranged in the housing to draw external air into the housing through the air inlet. The external air is filtered and sterilized by the porous wheel and the sterilization module, and then the clean air is discharged from the air outlet. The sterilization module is arranged beside the porous wheel. The sterilization module can sterilize the air flowing through the sterilization module and sterilize the porous wheel by relative rotation between the porous wheel and the sterilization module to kill the bacteria and viruses attached to the porous wheel, so that the sterilization efficiency of the air sterilization device is improved.

Description

Technical Field

[0001] This invention relates to an air disinfection device, particularly an air disinfection device that can significantly improve filtration and disinfection efficiency, and effectively eliminate viruses and bacteria in the ambient air. Background Technology

[0002] Various suspended substances in the air have different particle sizes, such as dust (approximately 500 micrometers or smaller), bacteria (approximately 0.5-5 micrometers), and viruses (approximately 10-300 nanometers). Many suspended substances are invisible to the naked eye, and some (such as bacteria and viruses) are harmful to the human body. Therefore, how to eliminate harmful substances in the air to maintain a clean environment and protect human health has become a topic of public concern.

[0003] A common method of air purification is to place air purifiers in the environment to filter the air. During the purification process, air passes through the filter of the air purifier to remove harmful substances, resulting in cleaner air. Regular filters can remove larger particles of dust and other pollutants, but smaller particles such as bacteria and viruses can still pass through. For more effective air purification, high-efficiency particulate air (HEPA) filters can be used. However, these HEPA filters still need to be replaced regularly or as needed depending on the pollution level to maintain their effectiveness. Failure to replace the filter in a timely manner can easily create a breeding ground for bacteria or viruses, causing secondary pollution and failing to achieve the desired air purification effect.

[0004] Besides filtration, high temperatures, chemicals, radiation, and high pressure can also be used to achieve sterilization or disinfection. The principle of disinfection is to use physical or chemical methods to cause irreversible changes in the components of bacteria or viruses, thereby achieving sterilization. For example, heating can cause the proteins of pathogens to coagulate and denature or the lipids to dissolve, thus rendering the pathogens inactive. Alternatively, ultraviolet light can be used to irradiate pathogens, destroying their material structure and preventing them from continuing to proliferate.

[0005] If an air purifier were to heat all the air in a room to a temperature suitable for disinfection, it would require a significant amount of energy, making it not only inconvenient but also impractical. Therefore, some air purifiers utilize slender components made of ceramic material with multiple narrow, parallel channels through which heating wires extend. As air flows through these channels, the heating wires heat and disinfect the air. However, such air purifiers rely solely on heat convection within these small channels for disinfection, resulting in a very limited air volume and disinfection efficiency. To increase the air volume processed, a higher heating power is required to heat the air to the necessary disinfection temperature, making the operation of the air purifier extremely energy-intensive.

[0006] In addition, if such air purifiers use high-power heating and disinfection, the temperature of the purified air will be significantly higher than the ambient temperature, which can easily change the ambient temperature and humidity, causing discomfort to the user. Summary of the Invention

[0007] In view of the above problems, the purpose of this invention is to provide an air disinfection device that has low energy consumption, high disinfection intensity, large air volume handling capacity, and compact size, so as to improve the above-mentioned disadvantages.

[0008] To achieve the above objectives, the air disinfection device of the present invention includes a housing having an air inlet and an air outlet; a fan disposed within the housing, driving an airflow from the air inlet to the air outlet; a disc, being a wheel-shaped body of uniform thickness, disposed on the airflow path, and having multiple holes penetrating the wheel-shaped body for the airflow to pass through, and an outer surface of the disc having multiple microporous structures; a first disinfection module located between the air inlet and the disc, and disposed on an air inlet surface adjacent to the disc, the first disinfection module including: a shield, the shield having an opening on a first side adjacent to the disc and a vent on a second side away from the disc, a first space being formed between the opening and the vent; a first reflector disposed within the first space and spaced apart from the vent, such that... The path from the vent to the first space via the first reflector forms a non-linear channel; a disinfection element is disposed in the first space and located between the opening and the first reflector; and a drive mechanism drives the wheel to rotate relative to the first disinfection module; wherein, when the fan draws external air into the housing through the air inlet, a first portion of the external air enters the first space through the channel of the first disinfection module; and after passing through the disinfection element, the first portion of air passes through the holes of the wheel and sweeps over the microporous structure, and is discharged to the outside of the housing from the air outlet; a second portion of the external air passes through the holes of the wheel that are not blocked by the first disinfection module and sweeps over the microporous structure, and is discharged to the outside of the housing from the air outlet.

[0009] Therefore, the air disinfection device of the present invention can not only improve the disinfection and sterilization function, but also improve energy efficiency, and can increase the user's comfort without significantly changing the temperature and humidity of the environment. Attached Figure Description

[0010] Figure 1 This is a perspective view of an embodiment of the air disinfection device of the present invention.

[0011] Figure 2 for Figure 1 A 3D view of the air disinfection device with part of its outer casing removed.

[0012] Figure 3 for Figure 1 A cross-sectional schematic diagram of the air disinfection device from another perspective.

[0013] Figure 4 This is an exploded view of some parts of the air disinfection device of the present invention.

[0014] Figure 5 This is a cross-section of the disc of an air sterilization device and a partially enlarged schematic diagram.

[0015] Figure 6 This is a front view of an embodiment of the disinfection module of the present invention.

[0016] Figure 7 for Figure 6 A cross-sectional view of the disinfection module along the CC tangent.

[0017] Figure 8 for Figure 1 A schematic diagram of airflow inside the air disinfection device.

[0018] Figure 9 This is a schematic diagram of airflow in an air disinfection device according to another embodiment of the present invention.

[0019] Figure 10 This is a schematic diagram of airflow in an air disinfection device according to another embodiment of the present invention.

[0020] In the attached figures, the following labels are used:

[0021] 1: Air disinfection device

[0022] 20: Outer shell

[0023] 201: Air Inlet

[0024] 202: Air vent

[0025] 203: Upper shell

[0026] 204: Lower shell

[0027] 205: Side shell

[0028] 30, 30c: Disinfection module

[0029] 31, 31c: Mask

[0030] 31a: First Shield

[0031] 31b: Second Shield

[0032] 311: First Space

[0033] 312: Vent

[0034] 313: Opening

[0035] 32, 32a, 32c: Reflector

[0036] 311a: Channel

[0037] 33, 33c: Disinfection element

[0038] 40: Turntable Set

[0039] 41: Roulette

[0040] 411a: Air inlet side

[0041] 411b: Air outlet

[0042] 412: Hole

[0043] 413: Microporous structure

[0044] 42: Wheel drive mechanism

[0045] 421: Power components

[0046] 422: Output shaft

[0047] 50: Fan

[0048] 51: Air intake

[0049] 52: Exhaust vent

[0050] A: Part One Air

[0051] B: Part Two Air

[0052] R: Thermal radiation

[0053] F: Airflow Detailed Implementation

[0054] To more clearly illustrate the present invention, detailed descriptions of embodiments and accompanying drawings are provided below. Please refer to... Figures 1 to 4 These are perspective and cross-sectional views of an air disinfection device 1 according to an embodiment of the present invention. The air disinfection device 1 includes a housing 20, a disinfection module 30, a turntable assembly 40, and a fan 50.

[0055] The outer casing 20 of this embodiment comprises an upper casing 203, a lower casing 204, and a side casing 205 surrounding the upper casing 203 and the lower casing 204. In this embodiment, an air inlet 201 is provided on the side casing 205, and an air outlet 202 is provided on the upper casing 203. In other embodiments, the positions of the air inlet 201 and the air outlet 202 can also be set at appropriate locations on the outer casing 20 according to different design considerations. For example, the air inlet 201 and the air outlet 202 can also be set on different sides of the side casing 205.

[0056] The disinfection module 30, the turntable assembly 40, and the fan 50 are disposed within the housing 20. In this embodiment, the turntable assembly 40 is located between the fan 50 and the air inlet 201, and the disinfection module 30 is located between the air inlet 201 and the turntable assembly 40. The fan 50 includes an air intake 51, an air exhaust 52, and a fan blade 53. The air inlet 51 of the fan 50 corresponds to the turntable assembly 40, and the air exhaust 52 of the fan 50 corresponds to the air outlet 202 of the housing 20. By drawing external air into the housing 20 through the air inlet 201, and after the air is disinfected and sterilized by the disinfection module 30 and the turntable assembly 40, the purified air is discharged from the air outlet 202 of the housing 20 to the outside of the air disinfection device 1 by the fan 50. The mechanism and operating principle of the fan 50 are existing technologies, and it can also be implemented using an axial flow fan or other methods. In other embodiments, the fan 50 may also be configured between the air inlet 201 and the turntable assembly 40. For the sake of simplicity and ease of explanation, other components of the fan 50 are not shown in the drawings.

[0057] Please refer to the following as well. Figures 3 to 5 The turntable assembly 40 includes a wheel 41 and a wheel drive mechanism 42. In this embodiment, the wheel 41 is a generally uniformly thick wheel-shaped body with a first wheel surface and a second wheel surface (referred to as the air inlet surface 411a and the air outlet surface 411b, respectively). A plurality of holes 412 are included between the two wheel surfaces of the wheel 41, and these holes 412 penetrate both sides of the wheel-shaped body, allowing air to pass through the holes 412 from the air inlet surface 411a and be discharged from the air outlet surface 411b of the wheel 41. The outer surface of the wheel 41 has a microporous structure 413. The outer surface of the wheel 41 disclosed herein refers to the surface of the wheel 41 that is in contact with air. The outer surface may include the walls of the holes 412 and at least one of the air inlet surface 411a and the air outlet surface 411b of the wheel 41, while the microporous structure 413 is formed on the outer surface. Fine dust, bacteria, or viruses contained in the air flowing through the microporous structure 413 are adsorbed onto the microporous structure 413 due to the effects of van der Waals forces and electrostatic forces, thus capturing harmful suspended pollutants. In this embodiment, the wheel 41 adopts a heat-resistant fiber skeleton structure to form pores 412. Zeolite, molecular sieves, or other materials are used on the heat-resistant fiber skeleton to form the microporous structure 413 on its outer surface. The microporous structure 413 can be of appropriate structure and size depending on different design considerations. For example, pores smaller than 2 nanometers or smaller than 50 nanometers can be used. Figure 5An enlarged view of an embodiment showing a portion of the microporous structure 413 on the wall of the hole 412. When the fan 50 draws air in, the airflow F flows from the air inlet surface 411a of the disc 41 through the hole 412 of the disc 41, and then flows out from the air outlet surface 411b of the disc 41. In this embodiment, the disc drive mechanism 42 has a power member 421 and an output shaft 422. The output shaft 422 is equipped with a gear that meshes with the gear on the rim of the disc 41. When the power member 421 drives the gear of the output shaft 422, the disc 41 will be driven to rotate accordingly. The rotational speed of the disc 41 depends on the rotational speed of the gear of the output shaft 422 driven by the power member 421.

[0058] The wheel 41, equipped with holes 412 and a microporous structure 413, effectively traps and retains bacteria and viruses from the air flowing through it. By rotating the wheel 41 using the wheel drive mechanism 42, each area of ​​the wheel 41 passes through the disinfection module 30, which then eliminates the bacteria and viruses adsorbed on the wheel 41. Figure 5 As shown, based on the flow direction of the airflow F on both sides of the display wheel 41, the two sides of the wheel 41 are the air inlet surface 411a and the air outlet surface 411b, respectively. Usually, the air inlet surface 411a will collect more bacteria and viruses, so the disinfection module 30 can be set on the air inlet surface 411a adjacent to the wheel 41.

[0059] Please refer to the following as well. Figures 3 to 7The disinfection module 30 is disposed on one side of the wheel 41. In this embodiment, the disinfection module 30 is disposed on the side adjacent to the air inlet surface 411a. The disinfection module 30 includes a shield 31, a reflector 32, and a disinfection element 33. In this embodiment, the shield 31 is composed of a first cover 31a and a second cover 31b. In other embodiments, the shield 31 may also be implemented by integral molding or by combining multiple components. In this embodiment, the shield 31 is positioned adjacent to but not in contact with the wheel surface of the wheel 41, so as to avoid affecting the rotation of the wheel 41 and to prevent air from flowing out through the gap between the shield 31 and the wheel 41 without passing through the wheel 41. The shield 31 has an opening 313 on a first side adjacent to the wheel 41 (i.e., on the first cover 31a) and a vent 312 on a second side away from the wheel 41 (i.e., on the second cover 31b). A first space 311 is formed between the opening 313 and the vent 312 of the shield 31. The reflector 32 and the disinfection element 33 are disposed in the first space 311, with the disinfection element 33 positioned between the reflector 32 and the wheel 41. The reflector 32 is configured to shield the vent 312 but is not completely fitted to the shield 31, allowing air to reach the first space 311 via the vent 312, the periphery of the shield 31, and the first reflector 32, forming a non-linear channel 311a. When the fan 50 draws air in, this channel 311a allows some air to pass through. After being disinfected by the disinfection element 33, the air passes through the wheel 41 and enters the fan 50, before being discharged from the outlet 202 to the outside of the air disinfection device 1.

[0060] The effectiveness of using heating or ultraviolet light to kill bacteria or viruses mainly depends on the intensity (temperature or light intensity) and the duration of the disinfection process (heating, irradiation). For example, the novel coronavirus COVID-19 can be inactivated by heating at 56°C for 30 minutes, rendering the virus non-infectious. However, if a filter heated to 200°C is used for purification, 99.8% of the COVID-19 virus in the airflow can be eliminated in approximately 0.01 seconds. Furthermore, for every 10°C increase in temperature, the required disinfection time can be reduced by approximately tenfold. Generally, the airflow speed driven by the fan in a household air conditioner is about 1.5–6 meters per second. Therefore, if air directly passes through the disinfection element, the disinfection time is quite short. For example, when the airflow speed is 2 meters per second and the disinfection path is 0.02 meters, the airflow only takes 0.01 seconds to pass through the disinfection path. To effectively achieve heat disinfection in this short time, a temperature of approximately 200°C or higher is required.

[0061] Therefore, the disinfection module 30 and the turntable assembly 40 can be designed and adjusted according to the disinfection energy and the required disinfection time. For example, assuming the disinfection range of the disinfection element 33 in the disinfection module 30 corresponds to a 30-degree arc angle of the turntable 41, then the disinfection time for a certain part of the turntable 41 (circumferential rotation angle 360 ​​degrees) to rotate through the disinfection module 30 is one-twelfth of the rotation cycle of the turntable 41. For example, if the turntable 41 rotates once in 120 seconds, then the disinfection time of the disinfection module 30 is 10 seconds. This disinfection time can be designed to be extended as needed, which can relatively reduce the energy consumption of the thermal disinfection component or the light disinfection component 33, achieving an energy-saving effect.

[0062] like Figure 8 In this embodiment, the disinfection element 33 is implemented as an electrothermal element and is represented by a serrated symbol. The heat radiation generated by the disinfection element 33 is represented by an arrow and R, and the appropriate heating power or temperature can be designed according to the requirements (e.g., the type of virus or bacteria to be eliminated). The reflector 32 is positioned between the vent 312 and the disinfection element 33. The reflector 32 can reflect the heat radiation R generated by the disinfection element 33, preventing the heat radiation R from directly escaping from the vent 312, and instead concentrating it on the opening 313 to disinfect the wheel 41. Therefore, the reflector 32 can effectively prevent the heat energy of the disinfection element 33 from dissipating. Furthermore, the channel 311a formed by the reflector 32 and the shield 31 is bent, making it difficult for the air in the first space 311 to flow back through the channel 311a, which also reduces heat loss. Therefore, the combination of the shield 31 and the reflector 32 can concentrate the heat radiation R, maintain the temperature of the disinfection effect on the disc 41, reduce the loss of heat energy, effectively save energy and improve the disinfection effect.

[0063] Please refer to the instructions for operating the air sterilization device 1. Figure 3 and Figure 8When using this air sterilization device 1, the fan 50 operates to introduce outside air into the housing 20 through the air inlet 201, while the wheel 41 is also driven by the wheel drive mechanism 42 to rotate at an appropriate speed. For ease of explanation, the introduced outside air is defined as a first part air A and a second part air B. The first part air A passes through the sterilization module 30 before passing through the wheel 41, while the second part air B passes through the wheel 41 without passing through the sterilization module 30. The first part of air A enters the first space 311 of the shield 31 through the vent 312 of the shield 31 and the channel 311a. The first part of air A is heated and disinfected by the disinfection element 33 and the reflector 32. This is the first disinfection process. After being heated and disinfected, the first part of air A passes through the hole 412 of the wheel 41 and passes through the microporous structure 413 on the hole 412 to capture bacteria and viruses. The bacteria and viruses captured on the microporous structure 413 are still inactivated by the disinfection element 33 to disinfect and sterilize the wheel 41. This is the second disinfection process. After completing the two air disinfection processes, the first part of air A becomes clean air after disinfection and sterilization. Then, the fan 50 discharges the first part of air A after disinfection and sterilization from the air outlet 202 to the outside of the device 1. Furthermore, after the second part of air B enters the outer casing 20, it directly passes through the holes 412 of the disc 41. The microporous structure 413 adsorbs the bacteria and viruses in the second part of air B, achieving the effect of capture and filtration. This ensures that the second part of air B is clean air when it exits the disc 41, and is then discharged from the outlet 202 by the fan 50 to the outside of the device 1. In addition, although the part of the disc 41 through which the second part of air B passes is not blocked by the disinfection element 33 for disinfection at this time, as the disc 41 rotates, each area of ​​the disc 41 will pass through the disinfection component 33 in turn, thus achieving the disinfection effect.

[0064] In the above implementation, the wheel 41 is circular, and the area covered by the shield 31 of the disinfection module 30 is roughly fan-shaped. The shield 31 of the disinfection module 30 covers the fan-shaped area (or a fan-shaped area) of the corresponding wheel 41 from near the center to the circumference. The central angle of the shield 31 can be set between 20 degrees and 110 degrees, and the area of ​​the air inlet surface 411a of the wheel 41 can be set to 5% to 30%. When the wheel 41 is driven by the wheel drive mechanism 42 to rotate at an appropriate speed, different areas on the wheel 41 will pass through the disinfection module 30 in sequence, so that the bacteria and viruses adsorbed on the microporous structure 413 of the wheel 41 will be eliminated after an appropriate disinfection time.

[0065] Since the heating and sterilization process is handled within the sterilization module 30, the energy or power consumed by the sterilization element 33 can be effectively reduced and the sterilization efficiency significantly improved by utilizing the non-linear air channel 311a formed by the reflector 32 of the sterilization module 30 and the reflection effect, and by rotating the wheel 41 at an appropriate speed and setting an appropriate sterilization time. Furthermore, the area of ​​the air inlet surface 411a of the wheel 41 that is shielded by the sterilization module 30 is much smaller than the area of ​​the air inlet surface 411a that is not shielded. Therefore, the first portion of air A passing through the sterilization module 30 is relatively less than the second portion of air B that does not pass through the sterilization module 30. In other words, the first portion of air A heated by the sterilization module 30 accounts for a smaller proportion of the air discharged outside the outer casing 20. Therefore, by setting parameters such as the suction and exhaust airflow velocity of the fan 50, the rotation speed of the impeller 41, and / or the power, area, and airflow velocity of the disinfection module 30, the temperature difference between the air drawn in through the air inlet 201 and the air discharged through the air outlet 202 of the air disinfection device 1 can be set to below 10°C. Thus, the temperature and humidity difference between the air discharged through the air outlet 202 and the ambient environment is minimal, preventing discomfort to the user.

[0066] In the above implementation, the disinfection module 30 is configured with a shield 31, a reflector 32 and a disinfection element 33 housed within it, and is positioned on one side of the air inlet surface 411a of the disc 41, but its placement is not limited to this. Please refer to [link / reference]. Figure 9 This invention discloses another embodiment of the air disinfection device 1 of the present invention. In this embodiment, in addition to the aforementioned first disinfection module 30, the air disinfection device 1 also includes a second reflector 32a, disposed on the air outlet surface 411b side of the disc 41. When external air enters this device 1, a first portion of air A first passes through the disinfection module 30 and then through the disc 41. After passing through the disc 41, the first portion of air A encounters the reflector 32a disposed on the air outlet surface 411b side of the disc 41, which reflects some of the thermal radiation energy back to the adjacent disc 41. This configuration allows the thermal radiation energy generated by the disinfection component 33 to pass through the disc 41 and then be reflected back to the disc 41 by the reflector 32a, further reducing energy consumption and improving energy efficiency, and more effectively eliminating bacteria and viruses on the disc 41.

[0067] Please see Figure 10This is another embodiment of the air disinfection device 1 of the present invention. In this embodiment, in addition to the aforementioned first disinfection module 30, the air disinfection device 1 is provided with a second disinfection module 30c on the air outlet surface 411b side near the wheel 41. The disinfection module 30c includes a shield 31c, a reflector 32c, and a disinfection element 33c. In this embodiment, when the air disinfection device 1 is running, after the outside air enters the device 1, the first part of air A flows in from the first disinfection module 30 on the air inlet surface 411a side of the wheel 41. After passing through the wheel 41, it will encounter the second disinfection module 30c to disinfect the first part of air A again with heat or light radiation. By using two sets of disinfection modules 30 and 30c to disinfect both sides of the wheel 41, in addition to higher efficiency, it can also ensure that the purification and disinfection of the wheel 41 is more thorough.

[0068] The aforementioned disinfection elements are not limited to electric heating elements. Besides sterilization via heat radiation, other disinfection methods can be used, such as heating, ultraviolet light, infrared light, or a combination thereof. Furthermore, the shape of the outer casing is not limited to a rectangular prism; different shapes can be used depending on the requirements. The number of air inlets and outlets is also not limited to one set, and they can be respectively located in different positions on the casing, allowing air to be filtered and disinfected by the disc while ensuring smooth airflow.

[0069] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the claims of the present invention.

Claims

1. An air disinfection device (1), characterized in that, Includes: An outer casing (20) has an air inlet (201) and an air outlet (202); A fan (50) is installed inside the housing (20) to drive an airflow (F) from the air inlet (201) to the air outlet (202); A disc (41) is a wheel-shaped body with uniform thickness. The disc (41) is disposed on the airflow (F) path. The disc (41) has multiple holes (412) penetrating the wheel-shaped body for the airflow (F) to pass through. The outer surface of the disc (41) has multiple microporous structures (413). A first disinfection module (30) is located between the air inlet (201) and the wheel (41), and is disposed on an air inlet surface (411a) adjacent to the wheel (41). The first disinfection module (30) includes: A shield (31) has an opening (313) on a first side (31a) adjacent to the wheel (41) and a vent (312) on a second side (31b) away from the wheel (41), and a first space (311) is formed between the opening (313) and the vent (312). A first reflector (32) is disposed within the first space (311) and spaced apart from the vent (312), such that the path from the vent (312) to the first space (311) via the first reflector (32) forms a non-linear channel (311a); and A disinfection element (33) is disposed in the first space (311) and located between the opening (313) and the first reflector (32); and A drive mechanism (42) drives the wheel (41) to rotate relative to the first disinfection module (30); When the fan (50) draws external air into the housing (20) through the air inlet (201), a first part of the external air (A) enters the first space (311) through the channel (311a) of the first disinfection module; and the first part of the air (A) passes through the disinfection element (33), through the holes (412) of the disc (41), and sweeps over the microporous structure (413), and is discharged from the air outlet (202) to the outside of the housing (20); a second part of the external air (B) passes through the holes (412) of the disc (41) that are not covered by the first disinfection module (30), and sweeps over the microporous structure (413), and is discharged from the air outlet (202) to the outside of the housing (20).

2. The air sterilization device as claimed in claim 1, wherein the shield (31) is generally fan-shaped, the disc (41) is circular, and the shield (31) covers at least the disc surface area between the center and a portion of the circumference of the disc (41).

3. The air disinfection device as claimed in claim 1 further includes a second disinfection module (30c), which is disposed between the disc (41) and the air outlet (202) and located on an air outlet surface (411b) of the disc (41) away from the air inlet (201).

4. The air disinfection device as claimed in claim 1 further includes a second reflector (32a) disposed between the disc (41) and the air outlet (202), and located on an air outlet surface (411b) of the disc (41) away from the air inlet (201).

5. The air disinfection device as claimed in claim 1, wherein the temperature difference between the air discharged from the air outlet (202) and the air drawn in from the air inlet (201) is less than or equal to 10°C.

6. The air disinfection device as claimed in claim 1, wherein the area of ​​the air inlet surface (411a) of the disc (41) covered by the shield (31) is 5% to 30%.

7. The air disinfection device as claimed in claim 1, wherein the disinfection element (33) comprises at least one of an electric heating component, an infrared generator, and an ultraviolet generator.

8. The air disinfection device as claimed in claim 1, wherein the fan (50) is disposed between the air inlet (201) and the disc (41).

9. The air disinfection device as claimed in claim 1, wherein the fan (50) is disposed between the disc (41) and the air outlet (202).

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