Photocatalyst sterilization module

Abstract

The utility model discloses a photocatalyst sterilization module which is high in photocatalyst adhesive force, high in surface density, not easy to fall off, continuous and effective in sterilization and good in air purification effect. The fan (3) is used for introducing external air into the photocatalyst sterilization module and finally exhausting the external air outwards so as to form air circulation inflow and outflow; photocatalyst microparticles are stacked on the surface of the photocatalyst filter screen (6), and the photocatalyst filter screen (6) is used for filtering and intercepting particulate matters, bacteria and virus microorganisms in the air, decomposing water and oxygen in the air through a photocatalyst to form active oxygen and hydroxyl free radicals, and further decomposing bacteria, viruses, formaldehyde and TVOC organic matters in the air into water and carbon dioxide; the ultraviolet light source assembly is used for activating photocatalyst microparticles on the surface of the photocatalyst filter screen (6) and directly killing bacteria and viruses intercepted by filtration, and the photocatalyst microparticles are sprayed on the surface of the photocatalyst filter screen (6) and then are fixed through sintering.

Description

Technical Field

[0001] The utility model relates to an air disinfection device, in particular to a photocatalyst sterilization module. Background Art

[0002] With the development of society and the improvement of people's living standards, the requirements for environmental safety and hygiene are gradually increasing. At the same time, the threats of various bacteria and viruses are becoming more and more prominent, and people have higher and higher requirements for the sterilization and disinfection of themselves and their daily necessities.

[0003] The existing air disinfection methods are generally divided into two categories: physical disinfection and chemical disinfection. However, the existing disinfection methods all have more or less shortcomings. For example, air sterilization is currently solved by ultraviolet rays, super-strong light, or sterilization by spray. Ultraviolet sterilization is mainly based on mercury lamp ultraviolet rays, which have low sterilization ability, and different bacteria have different resistance to ultraviolet rays, requiring different energy levels to be inactivated. Super-strong light sterilization, also known as pulsed light sterilization, consumes a lot of power, and a power of tens of thousands of watts is a conventional configuration. Chemical sterilization is conventionally spray sterilization, which is not sustainable, and spray sterilization is used in many scenarios, especially it cannot be used in moisture-proof environments. Therefore, the market needs products that combine cleaning, energy saving, continuous and effective sterilization, and air purification.

[0004] At present, there are also sterilization devices that use UVC LED light sources for irradiation and sterilization. However, the following problems are common:

[0005] (1) The existing UVC sterilization module has limited effect on air sterilization, especially the bacteria in high-speed air flow move quickly with the air, resulting in a relatively short UVC irradiation time for bacteria, thus failing to reach the irradiation dose and achieving a difficult inactivation effect;

[0006] (2) The use of photocatalysts to decompose bacteria requires the bacteria to be close to the surface of the photocatalyst, and the efficiency of decomposing bacteria at a long distance is almost zero;

[0007] (3) Existing photocatalysts produce less positive and negative ions, and the decomposition rate of organic matter is low; it is difficult to achieve efficient sterilization effects;

[0008] (4) Photocatalyst (titanium dioxide) itself has no adhesion and requires inorganic glue to bond to rough surfaces. The adhesion is generally poor, and the adhesion density of photocatalyst is low. If photocatalyst falls off, it will cause dust pollution.

[0009] Therefore, existing products have defects that need to be improved. Utility Model Content

[0010] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a photocatalyst sterilization module with high photocatalyst adhesion, high surface density, photocatalyst not easy to fall off, continuous and effective sterilization and good air purification effect, so as to solve at least one problem in the prior art.

[0011] The technical solution adopted by the utility model is: the utility model includes a fan, which is used to introduce external air into the interior of the photocatalyst sterilization module and finally discharge it outward to form an air circulation inflow and outflow; a photocatalyst filter, on the surface of which photocatalyst microparticles are accumulated, which are used to filter and intercept particulate matter, bacteria, virus microorganisms in the air, and decompose water and oxygen in the air through photocatalysts to form active oxygen and hydroxyl free radicals, and then decompose bacteria, viruses, formaldehyde, TVOC organic matter in the air into water and carbon dioxide; an ultraviolet light source component, which is used to activate the photocatalyst microparticles on the surface of the photocatalyst filter, and directly disinfect the filtered and intercepted bacteria and viruses, and the photocatalyst microparticles are sprayed on the surface of the photocatalyst filter and then fixed by sintering.

[0012] Furthermore, the ultraviolet light source assembly includes an ultraviolet light source board, and a UVCLED light source and a UVALED light source arranged on the ultraviolet light source board. The UVC LED light source is used to inactivate bacteria and activate the decomposition ability of the photocatalyst, thereby achieving a dual sterilization effect. The UVALED light source is used to excite the photocatalyst to improve the catalytic ability and effect of the photocatalyst. The photocatalyst is titanium dioxide.

[0013] Furthermore, the photocatalyst sterilization module also includes a bottom shell and a middle shell. The ultraviolet light source board and the photocatalyst filter are placed and fixed on the upper and lower sides of the bottom shell respectively. The middle shell is used to connect and fix the fan and is connected and fixed on the bottom shell.

[0014] Furthermore, a first bottom frame is provided on the outer periphery of the lower bottom surface of the bottom shell for limiting the bottom periphery of the photocatalyst filter. The outer peripheral shape and size of the photocatalyst filter are adapted to the inner cavity wall of the bottom shell so that the photocatalyst filter is connected and fixed to the bottom shell through its own elasticity; or is further fixed by gluing.

[0015] Furthermore, a second bottom frame is provided on the outer periphery of the lower bottom surface of the middle shell for limiting the bottom periphery of the fan, and a plurality of plungers are extended downwardly from the second bottom frame, and a plurality of connecting columns with inner holes are provided on the inner cavity wall of the bottom shell, and a plurality of the plungers are inserted into the inner holes and fixed therein, so that the middle shell is connected and fixed to the bottom shell.

[0016] Furthermore, the ultraviolet light source board is strip-shaped and is provided with multiple thereof, and the top surface of the side wall of the bottom shell is provided with several groups of overlapping grooves relative to each other, and multiple ultraviolet light source boards are overlapped on the several groups of overlapping grooves, and ventilation ducts are left between each of the ultraviolet light source boards and between the ultraviolet light source boards located on both sides and the side walls of the bottom shell, and after the middle shell and the bottom shell are connected and fixed, the ultraviolet light source board is clamped and fixed.

[0017] Furthermore, the photocatalyst filter screen includes a dense array of inclined wind holes.

[0018] Furthermore, the fan is an axial flow fan, and the angle A between the axis of the wind hole array and the axis of the fan is in the range of 30 to 60 degrees.

[0019] Furthermore, the air hole array is composed of the same polygons or different polygons.

[0020] Furthermore, the photocatalyst filter is made of aluminum alloy material.

[0021] The beneficial effects of the utility model are as follows: since the utility model includes a fan for introducing external air into the interior of the photocatalyst sterilization module and finally discharging it outward to form an air circulation inflow and outflow; a photocatalyst filter, on the surface of which photocatalyst microparticles are deposited, is used to filter and intercept particulate matter, bacteria, virus microorganisms in the air, and decompose water and oxygen in the air through photocatalysts to form active oxygen and hydroxyl free radicals, thereby decomposing bacteria, viruses, formaldehyde, and TVOC organic matter in the air into water and carbon dioxide; an ultraviolet light source component is used to activate the photocatalyst microparticles on the surface of the photocatalyst filter, and directly sterilize the filtered and intercepted bacteria and viruses, and the photocatalyst microparticles are sprayed on the surface of the photocatalyst filter and then fixed by sintering; the utility model overcomes the defects and shortcomings of the prior art, and solves the problem of low adhesion of the photocatalyst by spraying the photocatalyst microparticles on the surface of the photocatalyst filter and then fixing them by sintering. The sintered photocatalyst has no risk of falling off, thus avoiding dust pollution caused by the falling of the photocatalyst, and the photocatalyst microparticles are accumulated on the surface of the photocatalyst filter, so that the surface density of the photocatalyst is high, which can reach more than four times that of other current practices; the ultraviolet light source component can not only directly disinfect the bacteria and viruses trapped by the filter, but also activate the photocatalyst microparticles on the surface of the photocatalyst filter, and decompose the water and oxygen in the air through the photocatalyst to form active oxygen and hydroxyl radicals, and then decompose the bacteria, viruses, formaldehyde, and TVOC organic matter in the air into water and carbon dioxide, thereby achieving a double disinfecting effect, and through the physical and chemical dual disinfecting methods, it realizes the full-scale purification of the air, and its structure is compact and the applicability is strong, and it can be applied to a variety of disinfecting devices; therefore, the utility model is a photocatalyst sterilization module with high adhesion of the photocatalyst, high surface density, and the photocatalyst is not easy to fall off, and has a good effect of continuous and effective sterilization and air purification;

[0022] Since the ultraviolet light source assembly includes a UVC LED light source and a UVA LED light source arranged on the ultraviolet light source board, the UVC LED light source is used to inactivate bacteria and activate the decomposition ability of the photocatalyst, thereby achieving a dual sterilization effect, and the UVA LED light source is used to excite the photocatalyst to improve the catalytic ability and effect of the photocatalyst; the present invention solves the problem of low excitation efficiency of the photocatalyst by designing a composite structure of UVC+UVA light sources, and the UVA light source is the wavelength band with the highest excitation efficiency of the photocatalyst, so the utility model has high sterilization efficiency and good sterilization and air purification effects;

[0023] Since the photocatalyst filter includes a dense array of inclined wind holes; the present invention further uses an inclined wind hole array to allow the wind holes of the photocatalyst filter to be irradiated by ultraviolet light after multiple reflections and refractions, which has a higher efficiency in exciting the photocatalyst, and makes the positive and negative ion generation rate at least twice that of ordinary straight front wind holes. At the same time, the range of ultraviolet light irradiation is larger, further improving its direct irradiation sterilization effect on the surface of the photocatalyst filter; therefore, the utility model has a higher sterilization efficiency and better sterilization and air purification effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the photocatalyst sterilization module of the embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the photocatalyst sterilization module of the utility model from another perspective

[0026] Figure 3 It is a schematic diagram of the exploded structure of the photocatalyst sterilization module of the embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the exploded structure of the photocatalyst sterilization module of the embodiment of the utility model from another perspective;

[0028] Figure 5 It is a schematic diagram of a longitudinal cross-section structure of a photocatalyst sterilization module of an embodiment of the utility model;

[0029] Figure 6 The photocatalyst sterilization module of the utility model embodiment is Figure 5 Another vertical longitudinal section structural schematic diagram;

[0030] Figure 7 This is a schematic diagram of the overall structure of the photocatalyst filter screen of an embodiment of the utility model;

[0031] Figure 8 It is a schematic diagram of the overall structure of the photocatalyst filter screen of the embodiment of the utility model from another perspective. DETAILED DESCRIPTION

[0032] like Figures 1 to 8As shown, the photocatalyst sterilization module of the present embodiment is a low-voltage disinfection module, comprising a fan 3, which is used to introduce external air into the interior of the photocatalyst sterilization module and finally discharge it outward to form an air circulation inflow and outflow; a photocatalyst filter 6, a photocatalyst is provided on the surface of which, which is used to filter and intercept particulate matter, bacteria, viral microorganisms in the air, and decompose water and oxygen in the air through photocatalysts to form active oxygen and hydroxyl radicals, and then decompose bacteria, viruses, formaldehyde, TVOC organic matter in the air into water and carbon dioxide; an ultraviolet light source component, which is used to activate the photocatalyst microparticles on the surface of the photocatalyst filter 6, and directly disinfect the filtered and intercepted bacteria and viruses, and the photocatalyst microparticles are sprayed on the surface of the photocatalyst filter 6 and then fixed by sintering.

[0033] Furthermore, the ultraviolet light source assembly includes an ultraviolet light source plate 5, and a UVC LED light source 41 and a UVA LED light source 42 arranged on the ultraviolet light source plate 5. The UVC LED light source 41 is used to inactivate bacteria and activate the decomposition ability of the photocatalyst, thereby achieving a dual sterilization effect. The UVA LED light source 42 is used to excite the photocatalyst to improve the catalytic ability and effect of the photocatalyst. The photocatalyst is titanium dioxide.

[0034] Furthermore, the photocatalyst sterilization module further comprises a bottom shell 1 and a middle shell 2. The ultraviolet light source plate 5 and the photocatalyst filter 6 are respectively placed and fixed on the upper and lower sides of the bottom shell 1. The middle shell 2 is used to connect and fix the fan 3 and is connected and fixed on the bottom shell 1. A first bottom frame 11 is provided on the outer periphery of the lower bottom surface of the bottom shell 1, which is used to limit the bottom periphery of the photocatalyst filter 6. The outer peripheral shape and size of the photocatalyst filter 6 are adapted to the inner cavity wall of the bottom shell 1, so as to be connected and fixed to the bottom shell 1 through the elasticity of the photocatalyst filter 6 itself; or further fixed by gluing. A second bottom frame 21 is provided on the outer periphery of the lower bottom surface of the middle shell 2 for limiting the bottom periphery of the fan 3. The fan 3 is connected and fixed to the lower bottom surface of the middle shell 2 by connecting screws 8. The second bottom frame 21 extends downward to be provided with four plungers 22. The inner cavity wall of the bottom shell 1 is provided with four connecting columns 12 with inner holes 13. The four plungers 22 are inserted into the inner holes 13 and fixed, so that the middle shell 2 is connected and fixed to the bottom shell 1.

[0035] Furthermore, the ultraviolet light source board 5 is strip-shaped and is provided with multiple ones, and there are three in this embodiment. The top surface of the side wall of the bottom shell 1 is provided with three sets of overlapping grooves 15 opposite to each other. The three ultraviolet light source boards 5 are overlapped on the three sets of overlapping grooves 15 oppositely arranged. Ventilation ducts 51 are left between each ultraviolet light source board 5 and between the ultraviolet light source boards 5 on both sides and the side walls of the bottom shell 1. After the middle shell 2 is connected and fixed to the bottom shell 1, the ultraviolet light source board 5 is clamped and fixed. In this embodiment, a UVA LED light source 42 is arranged on the middle ultraviolet light source board 5, and a UVC LED light source 41 is arranged on the ultraviolet light source boards 5 on both sides.

[0036] Furthermore, the photocatalyst filter 6 includes a densely distributed inclined wind hole array 60. The fan 3 is an axial flow fan, and the angle A between the axis of the wind hole array 60 and the axis of the fan 3 is in the range of 30 to 60°, and is set to 60° in this embodiment. The wind hole array 60 is composed of the same polygons, or composed of different polygons. In this embodiment, hexagons 61 are arranged side by side, and a rhombus 60 is formed between four hexagons 61. Of course, a honeycomb structure such as a complete hexagon can also be used, or a complete triangle can be used, or other polygons can be used alone or in combination. In this embodiment, the photocatalyst filter 6 is made of aluminum alloy material.

[0037] In addition, in this embodiment, the photocatalyst particles are spherical, and the photocatalyst particles include a silica shell located in the outer layer and a titanium dioxide core located in the inner layer. The silica shell is attached to the titanium dioxide core, and the silica shell 1 is provided with a plurality of holes that communicate with the titanium dioxide core. UV ultraviolet sterilization together with titanium dioxide photocatalyst can allow water and oxygen in the air to form a large amount of active oxygen and hydroxyl radicals, which decompose organic matter such as bacteria, viruses, formaldehyde, TVOC in the air into water and carbon dioxide. Titanium dioxide and ultraviolet rays are catalysts for this chemical reaction, and titanium dioxide itself has no loss; conventional titanium dioxide has strong photochemical corrosion to organic matter, and a layer of silica is attached to the surface of titanium dioxide to isolate the corrosion of titanium dioxide to organic matter, fiber and other materials. At the same time, there are a large number of holes on the silica, which can allow titanium dioxide to contact water molecules and oxygen in the air. The generated active oxygen and hydroxyl radicals can penetrate the photocatalyst particles and be carried out by the wind to act on organic matter such as bacteria for decomposition and inactivation, thereby achieving efficient disinfection.

[0038] The above embodiments are only used for illustration and are not intended to limit the protection scope of the present utility model. Based on the embodiments in the specific implementation manner, other embodiments obtained by those skilled in the art without making any creative work shall all fall within the protection scope of the present utility model.

[0039] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] The utility model overcomes the defects and shortcomings of the prior art. The photocatalyst microparticles are sprayed on the surface of the photocatalyst filter 6 and then fixed by sintering, thereby solving the problem of low adhesion of the photocatalyst. The sintered photocatalyst has no risk of falling off, thus avoiding dust pollution caused by the falling of the photocatalyst. In addition, the photocatalyst microparticles are accumulated on the surface of the photocatalyst filter 6, so that the surface density of the photocatalyst is high, which can reach more than four times that of other current practices. The ultraviolet light source component can not only directly disinfect the bacteria and viruses trapped by the filtration, but also activate the surface of the photocatalyst filter 6. The photocatalyst microparticles decompose water and oxygen in the air through the photocatalyst to form active oxygen and hydroxyl radicals, and then decompose bacteria, viruses, formaldehyde, TVOC organic matter in the air into water and carbon dioxide, thereby achieving a double disinfection effect, and through the dual disinfection methods of physical and chemical, it realizes all-round purification of the air, and its structure is compact and applicable, and can be applied to a variety of disinfection devices; therefore, the utility model is a photocatalyst sterilization module with high photocatalyst adhesion, high surface density, photocatalyst not easy to fall off, continuous and effective sterilization and good air purification effect. In addition, the present invention solves the problem of low excitation efficiency of photocatalysts through the designed composite structure of UVC+UVA light sources. The UVA light source 42 is the band with the highest excitation efficiency for photocatalysts. Therefore, the utility model has high sterilization efficiency and good sterilization and air purification effects. In addition, the present invention further uses an inclined air hole array 60 so that the air holes of the photocatalyst filter 6 can be irradiated by ultraviolet light through multiple reflections and refractions, which has a higher efficiency in exciting photocatalysts, and makes the positive and negative ion generation speed at least twice that of ordinary straight front air holes. At the same time, the range of ultraviolet light irradiation is larger, which further improves the direct irradiation sterilization effect on the surface of the photocatalyst filter 6. Therefore, the utility model has higher sterilization efficiency and better sterilization and air purification effects.

[0042] The utility model can be widely used in the field of disinfection and sterilization.

Claims

1. A photocatalyst sterilization module, characterized in that: The invention comprises a fan (3) for introducing outside air into the interior of the photocatalyst sterilization module and finally discharging it to the outside to form an air circulation inflow and outflow; a photocatalyst filter (6) having photocatalyst microparticles deposited on its surface for filtering and intercepting particulate matter, bacteria, and virus microorganisms in the air, and decomposing water and oxygen in the air through photocatalysis to form active oxygen and hydroxyl free radicals, thereby decomposing bacteria, viruses, formaldehyde, and TVOC organic matter in the air into water and carbon dioxide; and an ultraviolet light source component for activating the photocatalyst microparticles on the surface of the photocatalyst filter (6) and directly sterilizing the filtered and intercepted bacteria and viruses, wherein the photocatalyst microparticles are sprayed on the surface of the photocatalyst filter (6) and then fixed by sintering.

2. The photocatalyst sterilization module according to claim 1, characterized in that: The ultraviolet light source assembly comprises an ultraviolet light source plate (5), and a UVC LED light source (41) and a UVA LED light source (42) arranged on the ultraviolet light source plate (5); the UVC LED light source (41) is used to inactivate bacteria and activate the decomposition ability of a photocatalyst, thereby achieving a dual sterilization effect; the UVA LED light source (42) is used to excite a photocatalyst, thereby improving the catalytic ability and effect of the photocatalyst; and the photocatalyst is titanium dioxide.

3. The photocatalyst sterilization module according to claim 2, characterized in that: The photocatalyst sterilization module further comprises a bottom shell (1) and a middle shell (2); the ultraviolet light source plate (5) and the photocatalyst filter (6) are respectively placed and fixed on the upper and lower sides of the bottom shell (1); and the middle shell (2) is used for connecting and fixing the fan (3) and is connected and fixed on the bottom shell (1).

4. The photocatalyst sterilization module according to claim 3, characterized in that: A first bottom frame (11) is provided on the outer periphery of the lower bottom surface of the bottom shell (1) for limiting the bottom periphery of the photocatalyst filter (6); the outer peripheral shape and size of the photocatalyst filter (6) are adapted to the inner cavity wall of the bottom shell (1) so as to be connected and fixed to the bottom shell (1) by the elasticity of the photocatalyst filter (6) itself; or further connected and fixed by gluing.

5. The photocatalyst sterilization module according to claim 3, characterized in that: A second bottom frame (21) is provided on the outer periphery of the lower bottom surface of the middle shell (2) for limiting the bottom periphery of the fan (3); the second bottom frame (21) is extended downwardly and is provided with a plurality of plungers (22); the inner cavity wall of the bottom shell (1) is provided with a plurality of connecting columns (12) with inner holes (13); a plurality of the plungers (22) are inserted into the inner holes (13) and fixed, so that the middle shell (2) is connected and fixed to the bottom shell (1).

6. The photocatalyst sterilization module according to claim 5, characterized in that: The ultraviolet light source panels (5) are strip-shaped and are provided in plurality. The upper top surface of the side wall of the bottom shell (1) is provided with a plurality of opposite groups of overlapping grooves (15). The plurality of ultraviolet light source panels (5) are overlapped on the plurality of groups of overlapping grooves (15). Ventilation ducts (51) are provided between the ultraviolet light source panels (5) and between the ultraviolet light source panels (5) located on both sides and the side walls of the bottom shell (1). After the middle shell (2) and the bottom shell (1) are connected and fixed, the ultraviolet light source panels (5) are clamped and fixed.

7. The photocatalyst sterilization module according to claim 1, characterized in that: The photocatalyst filter (6) comprises a densely distributed array of inclined air holes (60).

8. The photocatalyst sterilization module according to claim 7, characterized in that: The fan (3) is an axial flow fan, and the angle A between the axis of the wind hole array (60) and the axis of the fan (3) is in the range of 30 to 60 degrees.

9. The photocatalyst sterilization module according to claim 7, characterized in that: The air hole array (60) is composed of the same polygons or different polygons.

10. The photocatalyst sterilization module according to any one of claims 1 or 7 to 9, characterized in that: The photocatalyst filter (6) is made of aluminum alloy material.

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