Photocatalyst air purification and sterilization machine

Abstract

The utility model relates to a kind of photocatalyst air purification disinfection machines, including machine body, the machine body is sequentially provided with primary filter, fan, high efficiency filter and photocatalyst component from below to above, the machine body side wall is equipped with air inlet corresponding primary filter, the air inlet side and the air outlet side of the photocatalyst component are equipped with light-shielding ventilation component, multiple photocatalyst modules are arranged in the mounting bracket of photocatalyst component, ultraviolet lamp is arranged in the center of photocatalyst module, and ultraviolet lamp is also arranged uniformly around photocatalyst module outer four quarters.The clean air after the grading filtration of primary filter and high efficiency filter enters the photocatalyst component, ultraviolet lamp is built-in in photocatalyst cylindrical base web, multiple ultraviolet lamps are externally arranged, compact structure, the inner and outer surfaces of photocatalyst module are irradiated, photocatalytic efficiency is greatly improved, it has dust removal clean purification, disinfection and sterilization, decomposition and degradation organic pollutant, generates negative oxygen ion, is beneficial to the health care of human body and other functions, and is widely applicable to multiple places.

Description

Technical Field

[0001] This utility model relates to the field of air purification and disinfection technology, specifically to a photocatalytic air purification and disinfection machine. Background Technology

[0002] Photocatalytic air purifiers utilize photocatalysis, which, under light irradiation, produces a photocatalytic reaction similar to photosynthesis. This generates highly oxidizing free hydroxyl radicals and reactive oxygen species, possessing strong photo-oxidation and reduction capabilities. It can oxidize and decompose various organic compounds and some inorganic substances, destroy bacterial cell membranes and solidify viral proteins, killing bacteria and decomposing organic pollutants into harmless water (H2O) and carbon dioxide (CO2). Photocatalytic technology can kill bacteria and viruses in the air and decompose some volatile organic compounds. Due to its environmentally friendly and safe characteristics, it is currently chosen by many air purifier manufacturers. Traditional photocatalytic air purifiers have the following drawbacks:

[0003] 1. Traditional photocatalytic air purifiers and sterilizers have a small photocatalytic mesh surface area and use hot cathode ultraviolet lamps as their irradiation source, which have low irradiation intensity, directly reducing photocatalytic efficiency and resulting in a short effective service life.

[0004] 2. The air dust particles entering the photocatalyst component are not filtered effectively. After the sterilizer has been running for a long time, the photocatalyst mesh will be covered by dust or other pollutants, causing the photocatalyst to lose its photocatalytic efficiency, thus shortening its effective service life. In addition, traditional air filters are all plate type or pleated cylindrical type, which have small dust holding capacity and high replacement frequency.

[0005] 3. To prevent ultraviolet light leakage, although light-shielding plates are installed on the inlet and outlet sides of the photocatalytic disinfection component, the existing light-shielding effect and ventilation resistance are still insufficient. Therefore, in order to solve the above problems, it is urgent to design a photocatalytic air purification and disinfection machine. Utility Model Content

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a photocatalytic air purification and disinfection machine. Clean air, after being filtered through a pre-filter and a high-efficiency filter, enters the photocatalytic module. This clean air provides excellent protection for the ultraviolet lamp and the photocatalytic cylindrical base mesh. The W-shaped pleated rotating filter cloth has a large dust capacity and a long replacement cycle. The photocatalytic cylindrical base mesh has a built-in ultraviolet lamp and multiple external ultraviolet lamps to irradiate the inner and outer surfaces of the photocatalytic module, greatly improving photocatalytic efficiency. It has functions such as dust removal, purification, disinfection, sterilization, decomposition and degradation of organic pollutants, and generation of negative oxygen ions. Negative oxygen ions are beneficial to human health and are widely applicable to various clean, purifying, and disinfecting environments.

[0007] The purpose of this utility model is achieved as follows:

[0008] A photocatalytic air purification and disinfection machine includes a body. From bottom to top, the body contains a pre-filter, a fan, a high-efficiency filter, and a photocatalytic component. An air inlet is located on the side wall of the body corresponding to the pre-filter. Both the air inlet and outlet sides of the photocatalytic component are equipped with light-shielding and ventilation components. The photocatalytic component includes a mounting frame fixed within the body. Multiple photocatalytic modules are arrayed within the mounting frame. Each photocatalytic module has a central ultraviolet lamp, and ultraviolet lamps are also evenly distributed around its perimeter.

[0009] Preferably, the photocatalyst module is fixed in the mounting frame by two fixing plates arranged at the top and bottom. The photocatalyst module includes a photocatalyst cylindrical base mesh, a cylindrical support and an ultraviolet lamp. The photocatalyst cylindrical base mesh covers the circumferential surface of the cylindrical support, and the ultraviolet lamp in the photocatalyst module is fixed at the center of the cylindrical support.

[0010] Preferably, the cylindrical support includes ribs, fixing rings, and mounting ribs. Ribs are evenly distributed around the circumference of the cylindrical support. Both ends of multiple ribs are fixed by fixing rings. The fixing ring at the top is connected to the mounting rib. The mounting rib has a first ultraviolet lamp mounting hole at its center. The mounting rib has mounting ears extending radially outward, which are used to fix it to the fixing plate.

[0011] Preferably, the fixed plate array has multiple photocatalyst module mounting holes, and each photocatalyst module mounting hole has four second ultraviolet lamp mounting holes evenly distributed around its circumference. The second ultraviolet lamp mounting holes are used to install ultraviolet lamps outside the photocatalyst module.

[0012] Preferably, the primary filter includes a filter frame, a guide roller, a new fabric roller, an electric roller, and a take-up roller. The filter frame has a vertically penetrating air duct. The guide roller is rotatably mounted inside the filter frame. The new fabric roller and the take-up roller are rotatably mounted outside the filter frame. The take-up roller is driven to rotate by the electric roller. One end of the filter cloth is wound around the new fabric roller, and the other end is wound around the take-up roller after being guided by multiple W-shaped guide rollers inside the filter frame.

[0013] Preferably, the guide rollers are provided in two rows, and the two rows of guide rollers are arranged in a W-shape, alternating vertically.

[0014] Preferably, a mesh plate is provided on the leeward side of each filter cloth section, the mesh plate is inclined in the same direction as the corresponding filter cloth section, the mesh plate is fixed in the filter frame by a V-shaped frame, and the two ends of the mesh plate are respectively fixed to the V-shaped frame by bolts.

[0015] Preferably, the pre-filter and the high-efficiency filter have the same structure, only the material of the filter cloth is different. The filter cloth of the pre-filter is made of G4 standard non-woven fabric, and the filter cloth of the high-efficiency filter is made of N95 grade meltblown fabric for medical masks.

[0016] Preferably, the pre-filter and the high-efficiency filter are each equipped with a differential pressure sensor. The high-pressure end and the low-pressure end of the differential pressure sensor are connected to the air inlet side and the air outlet side of the corresponding filter. The differential pressure sensor, the electric roller and the fan are all electrically connected to the touch control display screen.

[0017] Preferably, the light-shielding and ventilation assembly includes a ventilation frame, a first U-shaped light-shielding plate, a second U-shaped light-shielding plate, and a V-shaped light-shielding plate. The ventilation frame has two rows of first U-shaped light-shielding plates arranged in an array, with multiple first U-shaped light-shielding plates evenly distributed in each row. A V-shaped light-shielding plate is provided between two first U-shaped light-shielding plates in the same vertical column. The multiple V-shaped light-shielding plates are evenly distributed laterally, and a second U-shaped light-shielding plate is provided between two adjacent V-shaped light-shielding plates.

[0018] The beneficial effects of this utility model are:

[0019] Air enters the unit from the bottom and, after being filtered through a pre-filter and a high-efficiency filter, enters the photocatalyst assembly. This clean air provides excellent protection for the ultraviolet lamp and the photocatalyst cylindrical base mesh, preventing dust particles and greasy substances from adhering to their surfaces and affecting the photocatalytic effect. Simultaneously, the use of a cylindrical, open-mouthed photocatalyst base mesh reduces wind resistance, increases airflow, lowers fan energy consumption, significantly extends the equipment's lifespan, improves photocatalytic efficiency, and increases the production of negative oxygen ions. It possesses functions such as dust removal, cleaning and purification, disinfection and sterilization, generation of negative oxygen ions, and decomposition and degradation of organic pollutants, making it widely applicable to various locations.

[0020] The number of photocatalyst modules in the photocatalyst assembly can be set as needed. The modular design of the photocatalyst modules facilitates assembly, maintenance and replacement. Each photocatalyst module has a built-in ultraviolet lamp and four external ultraviolet lamps. The compact structure irradiates the inner and outer surfaces of the photocatalyst module, which greatly improves the photocatalytic efficiency.

[0021] The light-shielding ventilation component can prevent ultraviolet leakage from harming people, the internal environment of the machine, and external objects, while also reducing wind resistance.

[0022] The pre-filter and HEPA filter can automatically replace the filter cloth. When the air enters the pre-filter and HEPA filter from the front, there is an initial resistance micro-pressure difference (5-15Pa for pre-filters, 70-120Pa for HEPA filters) that keeps the filter cloth adhered to the mesh plate, preventing adjacent filter bags from sticking together and affecting the filtration effect. As the running time increases, the accumulated dust particle value increases synchronously, and the resistance micro-pressure difference also increases synchronously. When the set value is reached, the differential pressure sensor and controller send a signal and stop the fan. The electric roller will start running immediately. According to the preset running time, it ensures that all the filter cloth with dust accumulation is rolled onto the take-up roller within the specified time and replaced with new filter cloth. Then the fan will automatically start to run for the next cycle. When the filter cloth on the damped new cloth roller is used to 99%, the machine will issue a filter cloth replacement reminder in advance according to the set value. After reaching the set resistance, the machine will stop and no longer automatically roll the filter cloth, waiting for the replacement of the new filter roller.

[0023] This equipment is also equipped with a program control system, which allows users to view and control the operation status of the sterilizer via a touch control display screen installed on the machine or via a mobile phone. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a photocatalytic air purification and disinfection machine according to the present invention.

[0025] Figure 2 This is a front view of a photocatalytic air purification and disinfection machine according to this utility model.

[0026] Figure 3 for Figure 2 A sectional view.

[0027] Figure 4 This is a schematic diagram of the structure of a primary filter.

[0028] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0029] Figure 6 This is a schematic diagram of the internal structure of a primary filter.

[0030] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0031] Figure 8 This is a schematic diagram of the internal assembly structure of the take-up roller.

[0032] Figure 9 This is a schematic diagram of the three-dimensional structure of a photocatalyst component.

[0033] Figure 10 This is a schematic diagram of the internal structure of a photocatalyst assembly.

[0034] Figure 11 This is a schematic diagram of the assembly structure of the photocatalyst module.

[0035] Figure 12 This is a three-dimensional structural diagram of a light-shielding and ventilation component.

[0036] Figure 13 This is a schematic diagram of the airflow distribution of the light-shielding ventilation component.

[0037] in:

[0038] 1. Main body; 1.1. Air inlet; 2. Pre-filter; 2.1. Filter frame; 2.2. Guide roller; 2.3. New fabric roller; 2.4. Electric roller; 2.5. Take-up roller; 2.6. Connecting plate; 2.7. Transmission connecting sleeve; 2.8. Filter cloth; 2.9. Mesh plate; 2.10. V-frame; 3. Fan; 4. High-efficiency filter; 5. Photocatalyst assembly; 5.1. Mounting bracket; 5.2. Fixing plate; 5.2.1. Photocatalyst module mounting hole; 5.2.2. Second ultraviolet lamp mounting hole; 5.3. Photocatalyst cylindrical base mesh; 5. 3.1; Cylindrical bracket 5.3.2; Rib 5.3.2.1; Fixing ring 5.3.2.2; Mounting rib 5.3.2.3; First UV lamp mounting hole 5.3.2.3.1; Mounting ear 5.3.2.3.2; Limiting rib 5.3.2.4; UV lamp 5.3.3; Light-shielding and ventilation assembly 6; Ventilation frame 6.1; Slotted plate 6.1.1; Connecting plate 6.1.2; First U-shaped light-shielding plate 6.2; Second U-shaped light-shielding plate 6.3; V-shaped light-shielding plate 6.4; Touch control display screen 7. Detailed Implementation

[0039] See Figure 1-13 This utility model relates to a photocatalytic air purification and disinfection machine, including a body 1. The body 1 is provided with a pre-filter 2, a fan 3, a high-efficiency filter 4 and a photocatalytic component 5 from bottom to top. The side wall of the body 1 is provided with an air inlet 1.1 corresponding to the pre-filter 2. The photocatalytic component 5 is provided with a light-shielding ventilation component 6 on both the air inlet side and the air outlet side.

[0040] The primary filter 2 includes a filter frame 2.1, a guide roller 2.2, a new fabric roller 2.3, an electric roller 2.4, and a take-up roller 2.5. The filter frame 2.1 has a vertically penetrating air duct. The guide roller 2.2 is rotatably mounted inside the filter frame 2.1. The new fabric roller 2.3 and the take-up roller 2.5 are rotatably mounted outside the filter frame 2.1. The take-up roller 2.5 is driven to rotate by the electric roller 2.4. The new fabric roller 2.3 and the electric roller 2.4 are symmetrically arranged at the bottom of the filter frame 2.1 via a connecting plate 2.6. The take-up roller 2.5 is fixedly fitted onto the electric roller 2.4. Transmission connecting sleeves 2.7 are fixed at both ends of the electric roller 2.4. The take-up roller 2.5 is connected to the transmission connecting sleeves 2.7 by bolts, thereby fixing the electric roller 2.4 and the take-up roller 2.5.

[0041] One end of the filter cloth 2.8 is wound around the new cloth roller 2.3, and the other end is wound around the take-up roller 2.5 after passing through multiple guide rollers 2.2W-shaped guide cloths inside the filter frame 2.1.

[0042] The guide rollers 2.2 are arranged in two rows, with the two rows of guide rollers 2.2 arranged in a W-shape and staggered vertically. This facilitates the formation of a W-shaped structure of the filter cloth 2.8 within the filter frame 2.1, thereby increasing the spread area of ​​the filter cloth within the filter frame and enhancing the filtration effect.

[0043] To prevent adjacent fabric surfaces from sticking together within the filter frame 2.1 and reducing the effective filtration area, a mesh plate 2.9 is installed on the leeward side of each filter fabric section. The mesh plate 2.9 is inclined in the same direction as the corresponding filter fabric section. The mesh plate 2.9 is fixed inside the filter frame 2.1 by a V-shaped bracket 2.10, with both ends of the mesh plate 2.9 secured to the V-shaped bracket 2.10 by bolts. When air enters the filter fabric from the front, the slight pressure difference causes the filter fabric to adhere to the mesh plate 2.9 on the leeward side, preventing adjacent fabric surfaces from sticking together.

[0044] The primary filter 2 and the high-efficiency filter 4 are respectively equipped with differential pressure sensors (not shown in the figure). The high-pressure end and low-pressure end of the differential pressure sensor are connected to the air inlet side and air outlet side of the corresponding filter. The differential pressure sensor, the electric roller 2.4 and the fan 3 are all electrically connected to the touch control display screen 7 to realize the automatic replacement of filter cloth of primary filter 2 and high-efficiency filter 3 and realize the intelligent control of the disinfection machine.

[0045] The touch control display screen 7 is mounted on the body 1 and is at the same height as the photocatalyst assembly 5. The differential pressure sensor is built into the body 1 and can be mounted on the mounting bracket 5.1 of the photocatalyst assembly 5.

[0046] The pre-filter 2 and the high-efficiency filter 4 have the same structure, only the material of the filter cloth is different. The filter cloth of the pre-filter 2 is made of G4 standard non-woven fabric, which can remove particulate pollutants larger than 5μm in one pass with an efficiency of more than 40%, effectively reducing the dust load and replacement frequency of the subsequent high-efficiency filter. When the filter cloth in the pre-filter traps large particulate pollutants and causes the air resistance to reach the pressure difference set value, the pressure difference sensor feeds back the pressure difference signal to the touch control display screen 7. The touch control display screen 7 controls the fan 3 to stop running, and at the same time drives the electric roller 2.4 of the pre-filter 2 and the cloth taking roller 2.5 on it to rotate synchronously to automatically replace the contaminated filter cloth. When the number of new cloth rolls designed meets a certain value (from tens of meters to thousands of meters), it can be automatically replaced dozens to hundreds or even thousands of times. Once the new filter cloth is filled, it can be used for a long time, reducing the replacement frequency and saving operating costs.

[0047] The filter cloth of HEPA filter 4 is made of N95-grade meltblown fabric, which can remove pollutants such as dust particles larger than 0.3μm in a single pass with an efficiency of over 95%. A differential pressure sensor monitors the pressure difference within the HEPA filter in real time. When the filter cloth traps pollutants, causing air resistance to reach the set differential pressure value, the differential pressure sensor feeds back the differential pressure signal to the touch control display screen. The touch control display screen then controls the fan 3 to stop running and simultaneously drives the electric roller and its take-up roller of the HEPA filter 4 to rotate synchronously to automatically replace the contaminated filter cloth.

[0048] To facilitate the installation of the pre-filter 2 and the high-efficiency filter 4, and to protect the new fabric roller and the take-up roller, a roller protection cover is provided below the filter frame 2.1. The roller protection cover covers the new fabric roller and the take-up roller and is fixed to the machine body.

[0049] The photocatalytic component 5, as the core component of the sterilizer, is located on the top of the machine body 1. The photocatalytic component 5 includes a mounting frame 5.1, a fixing plate 5.2, and multiple photocatalytic modules 5.3. The mounting frame 5.1 is fixed inside the machine body 1. Multiple photocatalytic modules 5.3 are arrayed within the mounting frame 5.1. Each photocatalytic module 5.3 is fixed to the mounting frame 5.1 by two upper and lower fixing plates 5.2. Each photocatalytic module 5.3 includes a photocatalytic cylindrical base mesh 5.3.1, a cylindrical support 5.3.2, and an ultraviolet lamp 5.3.3. The photocatalytic cylindrical base mesh 5.3.1 covers the circumferential surface of the cylindrical support 5.3.2 and is fixed to the outside of the cylindrical support 5.3.2 by nickel wire. The ultraviolet lamp 5.3.3 is fixed at the center of the cylindrical support 5.3.2. The cylindrical support 5.3.2 includes ribs 5.3.2.1, fixing rings 5.3.2.2, and mounting ribs 5.3.2.3. The cylindrical support 5.3.2 has ribs 5.3.2.1 evenly distributed around its circumference. Multiple ribs 5.3.2.1 are fixed at both ends by fixing rings 5.3.2.2. The fixing rings 5.3.2.2 improve the strength of the cylindrical support 5.3.2. One end of the fixing ring 5.3.2.2 is connected to the mounting rib 5.3.2.3, and the other end of the fixing ring 5.3.2.2 is connected to a limiting rib 5.3.2.4. The limiting rib 5.3.2.4 is radially arranged and has a supporting and fixing arc segment corresponding to the head of the ultraviolet lamp 5.3.3. This fixes both ends of the ultraviolet lamp 5.3.3, preventing the ultraviolet lamp from being unstable and swinging, which would affect the photocatalytic effect.

[0050] The mounting rib 5.3.2.3 has a first ultraviolet lamp mounting hole 5.3.2.3.1 at its center. The mounting rib 5.3.2.3 extends radially outward with mounting ears 5.3.2.3.2, which are fixed to the fixing plate 5.2. The ultraviolet lamp 5.3.3 is inserted into the first ultraviolet lamp mounting hole 5.3.2.3.1 and then fixed with screws.

[0051] The fixed plate 5.2 array has multiple photocatalyst module mounting holes 5.2.1. Each photocatalyst module mounting hole 5.2.1 has four second ultraviolet lamp mounting holes 5.2.2 evenly distributed around its circumference. The second ultraviolet lamp mounting holes 5.2.2 are also used to install ultraviolet lamps to irradiate the outside of the photocatalyst module 5.3.

[0052] Two adjacent photocatalytic modules 5.3 share two ultraviolet lamps horizontally, and two adjacent photocatalytic modules 5.3 share two ultraviolet lamps vertically, ensuring that each photocatalytic module 5.3 has one ultraviolet lamp inside and four ultraviolet lamps arranged circumferentially on the outside. This increases the irradiation area of ​​the photocatalytic cylindrical base network 5.3.1 and ensures uniform irradiation. Each photocatalytic module 5.3 can receive sufficient light source both inside and outside, achieving the technical effect of catalytic photocatalysis, improving photocatalytic reaction efficiency, and enhancing the air disinfection function.

[0053] The photocatalyst cylindrical base mesh 5.3.1 is formed by spraying a photocatalyst coating onto the inner and outer surfaces of a nickel foam mesh. The photocatalyst coating is nano-sized anatase titanium dioxide. The ultraviolet lamp uses a cold cathode with a wavelength of UVC 253.7nm. The irradiance at UVC 253.7nm is more than twice that of a hot cathode ultraviolet lamp, and it does not generate heat. Its service life is twice that of a hot cathode ultraviolet lamp.

[0054] To prevent ultraviolet leakage from the photocatalyst component 5, which could damage the equipment and harm human skin and eyes, light-shielding ventilation components 6 are installed on both the air inlet and outlet sides of the photocatalyst component 5. The light-shielding ventilation components 6 include a ventilation frame 6.1, a first U-shaped light-shielding plate 6.2, a second U-shaped light-shielding plate 6.3, and a V-shaped light-shielding plate 6.4. The ventilation frame 6.1 has two rows of first U-shaped light-shielding plates 6.2 arranged in an array, with multiple first U-shaped light-shielding plates 6.2 evenly distributed in each row. A V-shaped light-shielding plate 6 is provided between two upper and lower first U-shaped light-shielding plates 6.2. 4. Multiple V-shaped light-shielding plates 6.4 are evenly spaced laterally. A second U-shaped light-shielding plate 6.3 is provided between two adjacent V-shaped light-shielding plates 6.4. The first U-shaped light-shielding plate 6.2 and the second U-shaped light-shielding plate 6.3 have the same structure, only different in size. The U-shaped bottom of the first U-shaped light-shielding plate 6.2, the U-shaped bottom of the second U-shaped light-shielding plate 6.3, and the V-shaped sharp corner of the V-shaped light-shielding plate 6.4 face the air inlet surface of the ventilation frame 6.1. The V-shaped light-shielding plate 6.4 is 90° V-shaped. The two side walls of the first U-shaped light-shielding plate 6.2 are inclined outward and the two side walls form a 90° angle.

[0055] The outwardly inclined sidewalls of the first U-shaped light shield 6.2 and the second U-shaped light shield 6.3, and the V-shaped sharp corner of the V-shaped light shield 6.4, divert the airflow on the windward side to both sides, reducing positive resistance. The airflow on the windward side passes through the gap between the adjacent first U-shaped light shields in the lower row, the gap between the second U-shaped light shield and the V-shaped light shield in the middle row, and the gap between the adjacent first U-shaped light shields in the upper row before being discharged from the light-shielding ventilation component. In this way, the airflow is guided and refracted multiple times to slow down the airflow speed, thereby reducing the noise caused by air intake and exhaust.

[0056] The first U-shaped light-shielding plate 6.2 and the second U-shaped light-shielding plate 6.3 are arranged in a staggered manner to achieve multi-layer light shading. The V-shaped light-shielding plate 6.4 further blocks the light and guides the airflow to both sides to reduce positive resistance.

[0057] The first U-shaped light shield 6.2 has a groove bottom width of 25mm and a side wall length of 16mm, while the second U-shaped light shield 6.3 has a groove bottom width of 16mm and a side wall length of 10mm. This design ensures no light source leakage while reducing ventilation resistance.

[0058] Based on the principle of geometric light refraction, the first U-shaped light shield 6.2, the second U-shaped light shield 6.3, and the V-shaped light shield 6.4 are stacked and combined, and fixedly connected to the ventilation frame 6.1 to form a light shielding and ventilation assembly. This assembly can completely prevent light leakage, reduce ventilation resistance, and will not produce buzzing or whistling noises when running at high wind speeds.

[0059] The ventilation frame 6.1 is formed by two slotted plates 6.1.1 and two connecting plates 6.1.2. The two slotted plates 6.1.1 have slots for inserting light-shielding plates to facilitate subsequent welding. The shape of the slots is adapted to the corresponding light-shielding plates. The two ends of the first U-shaped light-shielding plate, the second U-shaped light-shielding plate, and the V-shaped light-shielding plate are welded to the corresponding slotted plates.

[0060] Working principle:

[0061] Air enters the unit from the bottom and, after being filtered through a pre-filter and a high-efficiency filter, enters the photocatalyst assembly. This clean air provides excellent protection for the ultraviolet lamp and the photocatalyst cylindrical base mesh, preventing dust particles and greasy substances from adhering to their surfaces and affecting the photocatalytic effect. This significantly extends the equipment's lifespan, improves photocatalytic efficiency, and increases the production of negative oxygen ions. It has functions such as dust removal, cleaning and purification, disinfection and sterilization, generation of negative oxygen ions, and decomposition and degradation of organic pollutants, making it widely applicable to various places.

[0062] Practice has shown that higher air cleanliness not only increases the production of ecological-grade negative oxygen ions, but also effectively reduces the natural decay rate of ecological-grade negative oxygen ions.

[0063] Light-shielding ventilation components can prevent ultraviolet leakage from harming people, the internal environment of machines, and external objects, while also reducing wind resistance.

[0064] The pre-filter and HEPA filter can automatically replace the filter cloth. When air enters the filter cloth from the front, the resulting slight pressure difference causes the filter cloth to adhere to the mesh plate. As the ventilation operation time increases, the dust accumulation on the filter cloth will gradually increase, causing the pressure difference to increase synchronously. When the pressure difference reaches 1.5 times (or 2 times) the initial value, the pressure difference sensor will promptly send a signal according to the set value and stop the fan operation. The electric roller will immediately start running, ensuring that all the filter cloth with dust accumulation and contamination is rolled onto the take-up roller within the specified time according to the linear speed and the preset running time. Then, the fan will automatically start to run for the next cycle. When the filter cloth on the damped new cloth roller is used up to 99%, the machine will issue a filter cloth replacement reminder in advance according to the set value. After reaching the set resistance, the machine will stop and will no longer automatically roll the filter cloth.

[0065] The number of photocatalyst modules 5.3 within the photocatalyst assembly 5 can be set as needed. The modular design of the photocatalyst modules facilitates assembly, maintenance, and replacement.

[0066] This equipment is also equipped with a program control system, which allows users to view and control the disinfection machine's operating status via a touch control display screen installed on the machine body or via a mobile phone. The equipment's operating parameters include fan start / stop and time, fan speed (high, medium, low); airborne dust particle data (Pm2.5, Pm10); formaldehyde and total volatile organic compound (TVOC) content in the air; air resistance pressure difference between the pre-filter and HEPA filter and data on the amount of new filter cloth used; cumulative usage time of the cold cathode ultraviolet lamp and damage / replacement reminders, etc.

[0067] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A photocatalytic air purification and disinfection machine, characterized in that: The device includes a main body, which contains, from bottom to top, a pre-filter, a fan, a high-efficiency filter, and a photocatalyst assembly. The main body has an air inlet on its side wall corresponding to the pre-filter. The photocatalyst assembly has light-shielding and ventilation components on both its air inlet and outlet sides. The photocatalyst assembly includes a mounting bracket, which is fixed inside the main body. Multiple photocatalyst modules are arrayed within the mounting bracket. Each photocatalyst module has an ultraviolet lamp at its center and ultraviolet lamps evenly distributed around its perimeter.

2. The photocatalytic air purification and disinfection machine according to claim 1, characterized in that: The photocatalyst module is fixed in the mounting frame by two fixing plates set at the top and bottom. The photocatalyst module includes a photocatalyst cylindrical base mesh, a cylindrical support and an ultraviolet lamp. The photocatalyst cylindrical base mesh covers the circumferential surface of the cylindrical support, and the ultraviolet lamp in the photocatalyst module is fixed in the center of the cylindrical support.

3. The photocatalytic air purification and disinfection machine according to claim 2, characterized in that: The cylindrical support includes ribs, fixing rings, and mounting ribs. Ribs are evenly distributed around the circumference of the cylindrical support. Multiple ribs are fixed at both ends by fixing rings. The fixing ring at the top is connected to the mounting rib. The mounting rib has a first ultraviolet lamp mounting hole at its center. The mounting rib has mounting ears that extend radially outward and are fixed to the fixing plate through the mounting ears.

4. A photocatalytic air purification and disinfection machine according to claim 2, characterized in that: The fixed plate array has multiple photocatalyst module mounting holes, and each photocatalyst module mounting hole has four second ultraviolet lamp mounting holes evenly distributed around its circumference. The second ultraviolet lamp mounting holes are used to install ultraviolet lamps outside the photocatalyst module.

5. A photocatalytic air purification and disinfection machine according to claim 1, characterized in that: The primary filter includes a filter frame, a guide roller, a new fabric roller, an electric roller, and a take-up roller. The filter frame has a vertically penetrating air duct. The guide roller is rotatably mounted inside the filter frame. The new fabric roller and the take-up roller are rotatably mounted outside the filter frame. The take-up roller is driven to rotate by the electric roller. One end of the filter cloth is wound around the new fabric roller, and the other end is wound around the take-up roller after being guided by multiple W-shaped guide rollers inside the filter frame.

6. A photocatalytic air purification and disinfection machine according to claim 5, characterized in that: The guide rollers are arranged in two rows, with the two rows of guide rollers arranged in a W-shape and staggered vertically.

7. A photocatalytic air purification and disinfection machine according to claim 5, characterized in that: A mesh plate is provided on the leeward side of each section of filter cloth. The mesh plate is inclined in the same direction as the corresponding section of filter cloth. The mesh plate is fixed in the filter frame by a V-shaped frame. Both ends of the mesh plate are fixed to the V-shaped frame by bolts.

8. A photocatalytic air purification and disinfection machine according to claim 1, characterized in that: The pre-filter and the high-efficiency filter have the same structure, only the material of the filter cloth is different. The filter cloth of the pre-filter is made of G4 standard non-woven fabric, and the filter cloth of the high-efficiency filter is made of N95 grade meltblown fabric for medical masks.

9. A photocatalytic air purification and disinfection machine according to claim 1 or 8, characterized in that: The primary filter and the high-efficiency filter are each equipped with a differential pressure sensor. The high-pressure end and the low-pressure end of the differential pressure sensor are connected to the air inlet side and the air outlet side of the corresponding filter. The differential pressure sensor, the electric roller and the fan are all electrically connected to the touch control display screen.

10. A photocatalytic air purification and disinfection machine according to claim 1, characterized in that: The light-shielding and ventilation assembly includes a ventilation frame, a first U-shaped light-shielding plate, a second U-shaped light-shielding plate, and a V-shaped light-shielding plate. The ventilation frame has two rows of first U-shaped light-shielding plates arranged in an array, with multiple first U-shaped light-shielding plates evenly distributed in each row. A V-shaped light-shielding plate is provided between two first U-shaped light-shielding plates in the same row, and multiple V-shaped light-shielding plates are evenly distributed laterally. A second U-shaped light-shielding plate is provided between two adjacent V-shaped light-shielding plates.

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