Photocatalyst disinfection and purification device

Abstract

The invention discloses a photocatalyst disinfection and purification device, and relates to the technical field of air purification equipment.The photocatalyst disinfection and purification device comprises a shell, a cavity is formed in the shell, a photocatalyst carrier and a draught fan are fixedly installed in the cavity of the shell, the draught fan is located on one side of the photocatalyst carrier, an arc-shaped block is arranged in the shell, and an air channel is formed in the arc-shaped block; the air duct of the arc-shaped block is communicated with the cavity, the air duct is provided with a front end and a rear end, the fan is located at the front end of the air duct, the section size of the front end of the fan is smaller than that of the rear end of the fan and changes evenly, and a streamline structure with the front narrow and the rear wide is formed. The device has the effect of improving the overall purification efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and in particular to a photocatalyst disinfection and purification device. Background Art

[0002] Air purifiers are devices used to remove airborne pollutants (such as dust, bacteria, viruses, formaldehyde, and odors). They are widely used in homes, offices, hospitals, and industrial settings. Their core technologies include physical filtration (such as HEPA filters), electrostatic adsorption, ultraviolet disinfection, activated carbon adsorption, and photocatalysis.

[0003] Photocatalysts, typically nano-sized titanium dioxide, undergo a catalytic reaction when exposed to specific wavelengths of light (usually ultraviolet or visible light), breaking down organic pollutants and harmful microorganisms in the air. Their core functions include: decomposing organic pollutants, sterilizing, disinfecting, removing odors, and self-cleaning.

[0004] Traditional photocatalysts require ultraviolet (UV) light for activation, but recently developed visible light-responsive photocatalysts (such as nitrogen- or carbon-doped TiO2) can operate under everyday light. Typically, photocatalytic materials are applied to the purifier's filter, honeycomb-shaped substrate, or around the UV lamp, catalyzing the decomposition of pollutants as air flows through it.

[0005] In a photocatalytic disinfection and purification device, the fan's primary function is to draw in air and propel it for effective purification. However, during fan operation, the rapid movement of air and factors such as the shape and angle of the fan blades often lead to the generation of vortices. As air flows over the fan blades, its speed and direction change, especially at the blade edges and corners, creating unstable airflow that can form vortices. These vortices can affect the smoothness of the airflow, causing short-circuits or blind spots in purification, thereby reducing overall purification efficiency. Summary of the Invention

[0006] The present application provides a photocatalyst disinfection and purification device, which has the function of improving the overall purification efficiency.

[0007] The present application provides a photocatalytic disinfection and purification device, which adopts the following technical solutions: A photocatalyst disinfection and purification device includes a shell, a cavity is provided inside the shell, a photocatalyst carrier and a fan are fixedly installed inside the cavity of the shell, the fan is located on one side of the photocatalyst carrier, an arc block is provided inside the arc block, an air duct is provided inside the arc block, the air duct of the arc block is connected to the cavity, and the air duct is provided with a front end and a rear end, wherein the fan is located at the front end of the air duct, the front end cross-sectional dimension of the fan is smaller than its own rear end cross-sectional dimension and changes evenly, forming a streamlined structure that is narrow in front and wide in the rear.

[0008] By adopting this technical solution, the fan is combined with a streamlined curved air duct that is narrow in front and wide in the back, greatly optimizing air intake efficiency and flow distribution within the purification chamber. This not only reduces airflow resistance and turbulence, improving the fan's energy efficiency, but also ensures that air can evenly and fully contact the photocatalyst carrier, avoiding air short-circuits or purification blind spots, thereby significantly improving overall purification efficiency.

[0009] Preferably, the shell includes a connecting seat, an outer tube and a lighting cover connected to the outer tube.

[0010] By adopting the above technical solution, the shell is assembled by the connecting seat, the outer tube and the lighting cover, which is convenient for users to replace and repair.

[0011] Preferably, an exhaust port that matches the cross-sectional size of the arc-shaped block is provided inside the lighting cover.

[0012] By adopting the above technical solution, on the one hand, the mutual matching between the exhaust port and the arc block is used to achieve rapid positioning and installation of the lighting cover, and on the other hand, it is used to play the role of exhaust.

[0013] Preferably, the photocatalyst carrier includes a mounting base, two protrusions are fixedly installed on both sides of the mounting base, a second threaded hole is provided inside the protrusion of the mounting base, a second bolt is provided in the second threaded hole of the mounting base, and the photocatalyst carrier is fixedly mounted inside the connecting base by the second bolt.

[0014] By adopting the above technical solution, the positioning and installation of the photocatalyst carrier can be achieved.

[0015] Preferably, a central sleeve is fixedly installed at the center of the mounting base, and a plurality of filter element carrier sheets are arranged on the outer surface of the central sleeve at equal angles around its own central axis, and the filter element carrier sheets are sprayed with nano-photocatalyst factors.

[0016] By adopting the above technical solution and setting up the filter carrier sheet, harmful substances, odors and bacteria in the air can be effectively removed, thereby improving indoor air quality and reducing threats to health. The photocatalyst material itself is non-toxic and non-volatile, will not produce secondary pollution, is safe to use, and meets environmental protection requirements.

[0017] Preferably, the filter element carrier sheet is an arc-shaped structure, and wave-shaped folds are provided at the outer edge of the filter element carrier sheet, and the filter element carrier sheets stacked layer by layer form a thin sheet structure imitating fish gills.

[0018] By adopting the above technical solution, the pleated sheets cause the air to generate vortexes, extending the purification time; the gradient spacing adapts to the air duct flow rate to avoid airflow congestion.

[0019] Preferably, a negative ion module is provided at the rear end of the air duct of the arc block, and a plurality of negative ion release holes are provided on the inner wall of the air duct of the arc block, and the negative ion release end of the negative ion module faces the negative ion release hole.

[0020] By employing this technical solution, the negative ions generated by the negative ion module can combine with positively charged pollutants in the air, forming particulate matter, which is then settled or filtered out, effectively improving air quality. The release of negative ions can simulate the air quality of the natural environment, making indoor air fresher and enhancing the comfort of the space.

[0021] Preferably, a plurality of alloy scales that can be opened and closed synchronously are provided on the inner wall of the air duct of the arc block, the alloy scales cover the release hole, a driving part for synchronously driving the plurality of alloy scales is provided inside the arc block, and an air pollutant sensor is provided inside the arc block.

[0022] By adopting the above technical solution, when the air pollutant sensor detects that the pollutants in the air in the air duct exceed the threshold, the alloy scales are opened synchronously through the driving component, so that the release holes are fully exposed, which is used to increase the release amount of negative ions.

[0023] Preferably, a plurality of the alloy scales form a pine cone scale structure on the inner wall of the air duct of the arc-shaped block.

[0024] By adopting the above technical solution, the pollutant concentration is detected by the air pollutant sensor, and the opening and closing angles of the alloy scales are automatically adjusted; it is used to dynamically adjust the wind resistance and adapt to the energy consumption of different working conditions.

[0025] Preferably, the driving member includes a driving motor, several rotating rods and a through hole opened in the arc block, and the rotating rod is provided with several eccentric blocks. The eccentric blocks pass through the through hole and face the middle of the alloy scale, so that the alloy scale and the arc block are flipped, and the top of the alloy scale and the inner wall of the arc block are rotatably connected through a clockwork shaft.

[0026] By adopting the above technical solution, the driving motor drives the rotation of the eccentric block through the rotating rod; since the eccentric block is not located in the center of the rotating axis, it will produce horizontal displacement when rotating and exert force on the middle part of the alloy scale. The top of the alloy scale is connected to the inner wall of the arc block through the spring shaft, so that the alloy scale can rotate freely around the spring shaft under the push of the eccentric block.

[0027] In summary, this application has the following beneficial effects: 1. The fan, combined with a streamlined curved air duct that's narrow in front and wide in the back, significantly optimizes air intake efficiency and flow distribution within the purification chamber. This not only reduces airflow resistance and turbulence, improving the fan's energy efficiency, but also ensures even and sufficient air contact with the photocatalyst carrier, avoiding air short-circuits or blind spots, significantly improving overall purification efficiency.

[0028] 2. When the air pollutant sensor detects that the pollutants in the air in the air duct exceed the threshold, the driving part causes the alloy scales to open synchronously, so that the release holes are fully exposed, which is used to increase the release amount of negative ions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the overall structure of the photocatalyst disinfection and purification device in this embodiment; Figure 2 This is an overall exploded view of the photocatalyst disinfection and purification device in this embodiment; Figure 3 Schematic diagram of the overall structure of the fan in this embodiment; Figure 4 Schematic diagram of the internal structure of the photocatalyst carrier in this embodiment; Figure 5 Schematic diagram of the overall structure of the arc block in this embodiment; Figure 6 Schematic diagram of the internal structure of the driving member in this embodiment; Explanation of the accompanying drawings: 1. Shell; 101. Connecting seat; 102. Outer cylinder; 103. Lighting cover; 2. Support leg; 3. Mounting hole; 4. Lighting assembly; 5. First threaded hole; 6. Cavity; 7. Photocatalyst carrier; 701. Mounting base; 702. Protrusion; 703. Second threaded hole; 704. Center sleeve; 705. Filter element carrier sheet; 706. Wave-shaped pleats; 8. Fan; 9. Arc block; 10. Air duct; 11. Exhaust port; 12. Negative ion module; 13. Alloy scale; 14. Driving part; 1401. Rotating rod; 1402. Through hole; 1403. Eccentric block; 1404. Spring shaft. DETAILED DESCRIPTION

[0030] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example

[0031] The present invention discloses a photocatalyst disinfection and purification device, such as Figure 1 and Figure 2 As shown, it includes a shell 1, which consists of a connecting base 101, an outer tube 102 and a lighting cover 103 connected to the outer tube 102. Specifically, the cross-sectional size of the connecting base 101 is smaller than the cross-sectional size of the outer tube 102, and the central axis of the connecting base 101 coincides with the central axis of the outer tube 102. The connecting base 101 passes through the hole in the elevator car and is fixed to the inside of the elevator car hole by the support leg 2 provided on the connecting base 101. Therefore, the support leg 2 is a spring structure, which can adjust the support angle; it is fixed in the hole of the elevator car.

[0032] like Figure 1 and Figure 2 As shown, a circular mounting hole 3 is provided in the middle of the lighting cover 103, and a lighting assembly 4 is installed inside the mounting hole 3 of the lighting cover 103. A number of lamp beads are provided on the back of the lighting assembly 4. The lighting assembly 4 is integrated and installed in the mounting hole 3, which not only provides a good lighting effect, but also provides the necessary conditions for photocatalyst purification.

[0033] like Figure 1 and Figure 2 As shown, in addition, a plurality of first threaded holes 5 are provided inside the outer cylinder 102 and the lighting cover 103. When the first threaded holes 5 in the outer cylinder 102 and the first threaded holes 5 in the lighting cover 103 are relative to each other, the outer cylinder 102 and the lighting cover 103 are fixed by screwing the first bolt into the internal thread of the first threaded hole 5.

[0034] like Figure 2 and Figure 3 As shown, a cavity 6 is provided in the middle of the connecting seat 101, and a photocatalyst carrier 7 and a fan 8 are fixedly installed inside the cavity 6 of the connecting seat 101. The fan 8 is located on one side of the photocatalyst carrier 7, which helps to force air to pass through the photocatalyst; this can accelerate the air flow and allow more pollutants to contact the photocatalyst material, thereby improving the purification efficiency.

[0035] like Figure 2 and Figure 3As shown, two arc blocks 9 are symmetrically arranged inside the connecting seat 101, and the interior of the two arc blocks 9 is provided with an air duct 10 with an arc-shaped cross-section. The air duct 10 of the arc block 9 is interconnected with the cavity 6 of the connecting seat 101. Specifically, the bottom of the arc block 9 and the connecting seat 101 are suspended in the air and form a gap, and the gap is interconnected with the cavity 6.

[0036] like Figure 2 and Figure 3 As shown, the air duct 10 constructed by the arc block 9 can effectively guide the air flow; the arc design enables the air flow to maintain a better flow state when turning, reduces the turbulence of the air flow, and thus improves the overall utilization rate of the air flow; and the two symmetrically arranged arc blocks 9 help to form a uniform pressure distribution in the air duct 10; this symmetry can prevent local air flow blockage or the generation of negative pressure areas, thereby ensuring smooth air flow; the arc design of the air duct 10 enables the air at the inlet and outlet to be evenly distributed to the cavity 6 of the connecting seat 101, improves the circulation of air in the cavity 6, and thus promotes the effective work of the photocatalyst.

[0037] like Figure 2 and Figure 3 As shown, the design of the curved air duct 10 can reduce the resistance of the air flow, increase the flow rate and flow of air, and improve the ventilation efficiency of the system; more uniform air flow distribution can ensure that more air contacts the photocatalyst material, thereby improving its removal effect on harmful substances.

[0038] like Figure 3 As shown, the air duct 10 is provided with a front end and a rear end, wherein the fan 8 is located at the front end of the air duct 10, and the front end cross-sectional dimension of the fan 8 is smaller than its own rear end cross-sectional dimension and changes evenly, forming a streamlined structure that is narrow in front and wide in the back. Therefore, the air duct 10 adopts a structure that is narrow in front and wide in the back, which avoids airflow short-circuiting or purification dead corners, thereby significantly improving the overall purification efficiency.

[0039] like Figure 3 As shown, when the airflow passes through the narrow front part, it will be forced to accelerate, resulting in an increase in flow rate; in this process, the kinetic energy of the airflow increases, while the static pressure will be relatively reduced; this change helps to smooth the airflow into the wide rear part, reducing the generation of eddies and vortices; the design of narrow front and wide rear helps to reduce the turbulence generated by the airflow when turning or changing cross-section; through the streamlined design, the flow becomes smoother, thereby reducing the occurrence of turbulence.

[0040] like Figure 3 As shown, the interior of the lighting cover 103 is provided with an exhaust port 11 that matches the cross-sectional size of the arc block 9. On the one hand, the exhaust port 11 and the arc block 9 match each other to achieve rapid positioning and installation of the lighting cover 103, and on the other hand, it serves to exhaust air.

[0041] like Figure 4 As shown, the photocatalyst carrier 7 includes a mounting base 701, and two protrusions 702 are fixedly installed on both sides of the mounting base 701. A second threaded hole 703 is provided inside the protrusion 702 of the mounting base 701, and a second bolt is provided in the second threaded hole 703 of the mounting base 701. The photocatalyst carrier 7 is fixedly mounted inside the connecting base 101 by the second bolt.

[0042] like Figure 4 As shown, a central sleeve 704 is fixedly installed at the center position of the mounting base 701, and a number of filter carrier sheets 705 are arranged at equal angles on the outer surface of the central sleeve 704 around its own central axis. Nano-photocatalyst factors are sprayed on the filter carrier sheets 705. Under the action of light, the nano-photocatalyst factors can excite electrons and produce different reactions. These reactants have strong oxidizing properties; they can decompose organic pollutants, bacteria and viruses in the air and convert them into harmless substances; in the process of intercepting and treating air pollutants, the design of the filter carrier sheet 705 can increase the surface area of ​​the photocatalyst contact and improve the reaction efficiency of the photocatalyst; the simultaneous existence of multiple carriers can improve the processing capacity of the system; the equal angle setting of the filter carrier sheet 705 ensures that the light is evenly distributed, avoids the appearance of "shadow" areas, and enables each filter carrier sheet 705 to fully receive light, thereby improving the overall photocatalytic reaction efficiency.

[0043] like Figure 4 As shown, the filter carrier sheet 705 has an arc-shaped structure, and the outer edge of the filter carrier sheet 705 is provided with wavy pleats 706. The wavy pleats 706 of the filter carrier sheet 705 promote eddy currents when the air passes through, causing the airflow to form a rotating flow on the surface of the filter carrier sheet 705. This eddy current effect can increase the contact time between the air and the photocatalyst, thereby enhancing the air purification effect. Due to the design of the wavy pleats 706 structure, the contact area between the air flow and the filter element increases by approximately 50%. The increased contact area means that more pollutants and microorganisms can react with the photocatalyst, thereby improving the purification efficiency. The stacked filter carrier sheets 705 form a thin sheet structure that mimics fish gills, which can effectively disperse the airflow. The gradient spacing is designed according to the flow rate of the air duct 10 to avoid airflow congestion inside the filter element, thereby maintaining the stability and uniformity of the flow rate.

[0044] like Figure 5As shown, a negative ion module 12 is provided near the rear end of the air duct 10 of the arc block 9, and a plurality of negative ion release holes are provided on the inner wall of the air duct 10 of the arc block 9. The negative ion release end of the negative ion module 12 faces the negative ion release hole, and the negative ion module 12 generates negative ions through ionization technology; these negative ions are negatively charged oxygen molecules, which help to clean pollutants in the air; the release end of the negative ion module 12 points to the negative ion release hole on the inner wall of the air duct 10; when the air passes through the air duct 10 of the arc block 9, the generated negative ions will be released into the air through these release holes, forming a negative ion airflow; when the air flows through the air duct 10, the negative ions are sent into the car along with the airflow, forming an increase in the concentration of negative ions; this combination helps to improve the distribution uniformity and concentration of negative ions in the air.

[0045] like Figure 5 and Figure 6 As shown, a plurality of alloy scales 13 that can be opened and closed synchronously are provided on the inner wall of the air duct 10 of the arc block 9, and the alloy scales 13 cover the release hole. A driving part 14 for synchronously driving the plurality of alloy scales 13 is provided inside the arc block 9, and an air pollutant sensor is provided inside the arc block 9.

[0046] like Figure 5 and Figure 6 As shown, the air pollutant sensor monitors the air quality in the air duct 10 in real time and can detect specific pollutants (such as PM2.5, bacteria, volatile organic compounds, etc.); when the concentration of pollutants in the air exceeds a preset threshold, the air pollutant sensor will send a signal; after the driving member 14 receives the signal from the air pollutant sensor, it will activate the mechanism to drive the alloy scales 13 to open and close synchronously.

[0047] like Figure 5 and Figure 6 As shown, the alloy scales 13 cover the release holes to block or regulate the release of negative ions. When a high concentration of pollutants is detected, the alloy scales 13 will open synchronously to fully expose the release holes, thereby increasing the release of negative ions. Once the alloy scales 13 are opened, the negative ions in the air can be released into the environment faster and more fully, helping to purify the air and reduce the concentration of pollutants.

[0048] like Figure 5 and Figure 6 As shown, a number of alloy scales 13 form a pine cone scale structure on the inner wall of the air duct 10 of the arc block 9. The pollutant concentration is detected by the air pollutant sensor, and the opening and closing angles of the alloy scales 13 are automatically adjusted; it is used to dynamically adjust the wind resistance and adapt to the energy consumption of different working conditions (saving 20%); in addition, when the alloy scales 13 are closed, a maze-like channel is formed; and the opening and closing action of the alloy scales 13 generates auxiliary airflow disturbance, thereby improving the uniformity of purification.

[0049] like Figure 6 As shown, the driving member 14 includes a driving motor, several rotating rods 1401 and a through hole 1402 opened in the arc block 9. The rotating rod 1401 is provided with several eccentric blocks 1403. The eccentric blocks 1403 pass through the through hole 1402 and face the middle of the alloy scale 13, so that the alloy scale 13 and the arc block 9 are flipped. Specifically, the top of the alloy scale 13 and the inner wall of the arc block 9 are rotationally connected through the clockwork shaft 1404.

[0050] like Figure 6 As shown, the driving motor drives the rotation of the eccentric block 1403 through the rotating rod 1401; since the eccentric block 1403 is not located in the center of the rotating axis, it will produce horizontal displacement when rotating and exert force on the middle part of the alloy scale 13. The top of the alloy scale 13 is connected to the inner wall of the arc block 9 through the clockwork shaft 1404, so that the alloy scale 13 can rotate freely around the clockwork shaft 1404 under the push of the eccentric block 1403.

[0051] Working principle: When in use, the user first fixes the shell 1 in the hole on the top of the car through the support leg 2, and connects the circuit inside the shell 1 to make the fan 8 and the lighting assembly 4 start to operate. The lamp beads on the back of the lighting assembly 4 provide light sources and react with the nano-photocatalyst factors on the surface of the photocatalyst carrier 7 to decompose organic pollutants, bacteria and viruses in the air. Under the action of the fan 8, the air in the car is drawn into the interior of the cavity 6 through the gap between the lighting assembly 4 and the mounting hole 3, and the cavity 6 and the air duct 10 are interconnected, and the outlet of the air duct 10 faces the inside of the car, and the purified air generated by the reaction of the lighting assembly 4 and the photocatalyst carrier 7 in the cavity 6 is guided into the air duct 10, and then discharged back into the interior of the car through the outlet on the air duct 10.

[0052] The negative ion module 12 generates negative ions through ionization technology; these negative ions are negatively charged oxygen molecules that help clean pollutants in the air; the release end of the negative ion module 12 points to the negative ion release holes on the inner wall of the air duct 10; when the air passes through the air duct 10 of the arc block 9, the generated negative ions will be released into the air through these release holes, forming a negative ion airflow; when the air flows through the air duct 10, the negative ions are sent into the car along with the airflow, resulting in an increase in the concentration of negative ions; this combination helps to improve the distribution uniformity and concentration of negative ions in the air.

[0053] The air pollutant sensor monitors the air quality in the air duct 10 in real time and can detect specific pollutants, such as PM2.5, bacteria, volatile organic compounds, etc. When the concentration of pollutants in the air exceeds a preset threshold, the air pollutant sensor will send a signal; after the driving part 14 receives the signal from the air pollutant sensor, it will activate the mechanism to drive the alloy scales 13 to open and close synchronously.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A photocatalyst disinfection and purification device, comprising a housing (1), characterized in that: The shell (1) is provided with a cavity (6) inside, and a photocatalyst carrier (7) and a fan (8) are fixedly installed inside the cavity (6) of the shell (1), and the fan (8) is located on one side of the photocatalyst carrier (7). The shell (1) is provided with an arc block (9) inside, and an air duct (10) is provided inside the arc block (9), and the air duct (10) of the arc block (9) is communicated with the cavity (6), and the air duct (10) is provided with a front end and a rear end, wherein the fan (8) is located at the front end of the air duct (10), and the front end cross-sectional dimension of the fan (8) is smaller than the rear end cross-sectional dimension of the fan (8) and changes evenly, forming a streamlined structure that is narrow at the front and wide at the rear.

2. The photocatalytic disinfection and purification device according to claim 1, characterized in that: The housing (1) comprises a connecting seat (101), an outer cylinder (102), and a lighting cover (103) connected to the outer cylinder (102).

3. The photocatalytic disinfection and purification device according to claim 2, characterized in that: An exhaust port (11) having a cross-sectional size that matches that of the arc-shaped block (9) is provided inside the lighting cover (103).

4. The photocatalytic disinfection and purification device according to claim 2, characterized in that: The photocatalyst carrier (7) comprises a mounting base (701), two protrusions (702) are fixedly mounted on both sides of the mounting base (701), a second threaded hole (703) is provided inside the protrusion (702) of the mounting base (701), and a second bolt is provided inside the second threaded hole (703) of the mounting base (701), and the photocatalyst carrier (7) is fixedly mounted inside the connecting base (101) by the second bolt.

5. The photocatalytic disinfection and purification device according to claim 4, characterized in that: A central sleeve (704) is fixedly mounted at the center of the mounting base (701), and a plurality of filter element carrier sheets (705) are arranged on the outer surface of the central sleeve (704) at equal angles around its own central axis. Nano-photocatalyst factors are sprayed on the filter element carrier sheets (705).

6. The photocatalytic disinfection and purification device according to claim 5, characterized in that: The filter element carrier sheet (705) is an arc-shaped structure, and wave-shaped folds (706) are provided at the outer edge of the filter element carrier sheet (705). The filter element carrier sheets (705) stacked layer by layer form a thin sheet structure imitating fish gills.

7. The photocatalytic disinfection and purification device according to claim 2, characterized in that: A negative ion module (12) is provided near the rear end of the air duct (10) of the arc-shaped block (9), and a plurality of negative ion release holes are provided on the inner wall of the air duct (10) of the arc-shaped block (9), with the negative ion release end of the negative ion module (12) facing the negative ion release holes.

8. The photocatalytic disinfection and purification device according to claim 7, characterized in that: A plurality of alloy scales (13) that can be opened and closed synchronously are provided on the inner wall of the air duct (10) of the arc-shaped block (9), the alloy scales (13) covering the release hole, a driving member (14) for synchronously driving the plurality of alloy scales (13) is provided inside the arc-shaped block (9), and an air pollutant sensor is provided inside the arc-shaped block (9).

9. The photocatalytic disinfection and purification device according to claim 8, characterized in that: A plurality of the alloy scales (13) form a pine cone scale structure on the inner wall of the air duct (10) of the arc-shaped block (9).

10. The photocatalytic disinfection and purification device according to claim 8, characterized in that: The driving member (14) includes a driving motor, a plurality of rotating rods (1401) and a through hole (1402) provided in the arc block (9); the rotating rod (1401) is provided with a plurality of eccentric blocks (1403); the eccentric blocks (1403) pass through the through hole (1402) and face the middle of the alloy scale (13), so that the alloy scale (13) and the arc block (9) are flipped; the top of the alloy scale (13) and the inner wall of the arc block (9) are rotationally connected via a clockwork shaft (1404).

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