CN214051153U - Photocatalytic unit and air purifier - Google Patents

Abstract

The utility model discloses a photocatalysis unit, include: a photocatalytic plate which is a foamed ceramic plate loaded with a photocatalytic active component; the ultraviolet LED light sources are UVA waveband LED light sources and are uniformly distributed on grid bars of a grid lamp panel, and the grid lamp panel and the photocatalytic plate are arranged in parallel and are spaced at a certain distance and used for irradiating the photocatalytic plate; and the fixing frame fixes the foam ceramic plate and the grating lamp panel into a whole. The photocatalytic unit of the utility model is more firmly fixed and has stronger integrity; the air purifier using the photocatalysis unit can effectively remove volatile organic compounds generated in the indoor space and has the effects of disinfection and sterilization.

Description

Photocatalytic unit and air purifier

Technical Field

The utility model relates to a photocatalysis filters the field, in particular to photocatalysis unit and applied this photocatalysis unit to carry out filterable air purifier.

Background

When the concentration of Volatile Organic Compounds (VOCs) in indoor air is too high, acute poisoning is easily caused, and a mild person can have headache, dizziness, cough, nausea, vomiting or a drunk shape; serious patients can have hepatotoxicity and even coma, and some of them can be life-threatening. In the rooms polluted by VOCs in long-term life or work, chronic poisoning can be caused, the liver and the nervous system are damaged, and general weakness, sleepiness, skin itch and the like are caused; benzene and xylene can also damage the system, leading to leukemia. However, the existing indoor VOCs are generally exhausted by ventilation and air exchange, and only the air exhaust end is treated and detected, so that indoor environment detection and treatment means are lacked, and in addition, an effective air purification solution is also lacked for toxic and harmful microorganisms, bacteria and virus pollution in the indoor environment. The existing air purification mainly adopts ultraviolet light for killing and eliminating, the efficiency is lower, and an ultraviolet light generator mainly adopts a mercury lamp, so that the potential safety hazard is large.

In recent years, the photocatalytic purification technology has the advantages of mild reaction conditions, good stability, thorough purification effect and the like, so that the photocatalytic purification technology is an environmental pollution treatment technology with good application prospect. Titanium dioxide (TiO)₂) Has good light corrosion resistance and catalytic activity, stable performance, low price, easy obtaining, no toxicity and no harm, and is the best photo-catalyst recognized at present.

The titanium dioxide photocatalyst is usually used in a powder shape, and in practical application, the titanium dioxide needs to be fixed on a carrier, so that the defects of the suspension phase titanium dioxide photocatalyst can be overcome. At present, the carrier materials mainly comprise glass carriers such as glass sheets, glass fiber nets and the like, ceramic carriers such as alumina ceramic sheets, honeycomb ceramic columns, foamed ceramics and the like, and metal carriers such as titanium sheets, stainless steel plates, foamed nickel and the like. The common supporting method is a titanium glue supporting method or a method of adding titanium oxide crystal grains into a binding agent to support, and then sintering at high temperature to prepare the supported photocatalyst.

In order to improve the indoor air quality, an efficient purification facility aiming at organic waste gas is needed, harmful bacteria and viruses can be killed, and particularly, an air purification unit manufactured by utilizing a photocatalytic purification principle and an air purifier applying the photocatalytic unit for filtering are needed; there is also a need for a photocatalytic unit that is more secure and integral.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fixed firm and stronger photocatalytic unit of wholeness and applied this photocatalytic unit to carry out filterable air purifier, this air purifier can effectively get rid of the volatile organic compounds that the interior space produced, has the efficiency of virus killing and sterilization simultaneously.

To achieve the above object, the present invention provides a photocatalytic unit, including: a photocatalytic plate which is a foamed ceramic plate loaded with a photocatalytic active component; the ultraviolet LED light sources are UVA waveband LED light sources and are uniformly distributed on grid bars of a grid lamp panel, and the grid lamp panel and the photocatalytic plate are arranged in parallel and are spaced at a certain distance and used for irradiating the photocatalytic plate; and the fixing frame fixes the foam ceramic plate and the grating lamp panel into a whole.

Further, among the above-mentioned technical scheme, fixed frame can be a rectangle frame construction, includes: the upper clamping groove is matched with the thickness of the grid lamp plate and extends along the circumferential direction of the frame; and the lower clamping groove is matched with the thickness of the foamed ceramic plate and extends along the circumferential direction of the frame.

Further, among the above-mentioned technical scheme, the frame construction of fixed frame is enclosed by four frames and closes and form, and adjacent frame is fixed through L shape angle sign indicating number, L shape angle sign indicating number lock is in the angle sign indicating number draw-in groove of frame tip and through the double-screw bolt fastening.

Furthermore, among the above-mentioned technical scheme, be equipped with on a frame and supply the through-hole and the trough that the lamp line wore through to establish, the lamp line is worn out from the through-hole and is followed the extension of angle sign indicating number draw-in groove and worn out in the trough.

Further, among the above-mentioned technical scheme, the interval distance of grid lamp plate and photocatalysis board can set up to 15 mm.

Further, in the technical scheme, the opening ratio of the foamed ceramic plate can be 70% -90%, and the pore density can be 8-60 ppi.

The utility model also provides an air purifier, including aforementioned photocatalysis unit, photocatalysis unit installs in this air purifier's casing.

Furthermore, in the technical scheme, the air purifier adopts a side wall air inlet mode and a top air outlet mode; the two groups of photocatalytic units are respectively arranged in the two opposite side walls of the shell and are obliquely arranged relative to the vertical plane; two photocatalytic units are adopted in each group.

Further, in the above technical solution, an inclination angle between the photocatalytic unit and the vertical plane may be set to 5 degrees to 15 degrees.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the grille lamp plate and the foam ceramic plate are fixed through the fixing frame, so that the fixing is firm and the integrity is better;

2) the grid lamp panel and the foam ceramic plate are clamped and fixed through the upper clamping groove and the lower clamping groove respectively, so that the installation is firmer and more compact;

3) the angle code clamping groove and the wiring groove are matched for use, so that the outgoing line of the lamp line is more reasonable and attractive;

4) the photocatalysis unit can effectively remove volatile organic compounds generated in the indoor space and has the effects of sterilization and disinfection;

5) the air purifier using the photocatalytic unit has the advantages that air enters from the air inlet direction in the inclined mode of the photocatalytic plate, the space occupied by the photocatalytic unit in the shell is saved, the air passing area on the cross section of the photocatalytic plate per unit can be increased, the wind resistance is reduced, the filtering efficiency can be effectively improved, and meanwhile, the air passing on the upper portion and the lower portion of the photocatalytic unit is more uniform.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means more comprehensible, and to make the above and other objects, technical features, and advantages of the present invention easier to understand, one or more preferred embodiments are listed below, and the following detailed description is given with reference to the accompanying drawings.

Drawings

Fig. 1 is an exploded schematic view of the air purifier of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the air purifier (showing the direction of air flow).

Fig. 3 is a perspective view of the photocatalytic unit of the present invention.

Fig. 4 is an exploded schematic view of fig. 3.

Fig. 5 is a schematic sectional view of the photocatalytic unit of the present invention.

Description of the main reference numerals:

1-air purifier, 10-photocatalysis unit, 11-air inlet, 12-air outlet, 13-fixing frame, 130-corner connector, 131-upper clamping groove, 132-lower clamping groove, 133-wiring groove, 134-corner connector clamping groove, 14-HEPA filter, 15-foam ceramic plate, 16-grille lamp plate, 161-ultraviolet LED light source and 17-diagonal flow fan.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.

As shown in fig. 1, the air purifier 1 of the present invention is mainly used for indoor air purification and generates a circulating air flow indoors. The air purifier 1 is a rectangular parallelepiped housing structure. Further, air intake department is equipped with the grid, passes through in proper order from the air current that the air intake got into the utility model discloses a HEPA filter and photocatalysis unit, the air current drive unit through the air current rear end realizes the air cycle in indoor place.

As further shown in fig. 1, the air purifier 1 includes: an airflow driving unit and a photocatalytic unit 10, wherein the airflow driving unit is located at the airflow end of the air purifier 1 and is used for providing power for indoor circulating airflow; photocatalytic unit 10 installs in air purifier's casing 1 and slope setting, the air inlet direction and the air-out direction of casing are perpendicular, and as shown in the figure, fig. 1 adopts lateral wall air inlet, top air-out. Preferably, but not limitatively, the airflow driving unit employs a diagonal flow fan 17. Further as shown in fig. 1 and 2, the casing of the air purifier 1 is a rectangular frame structure, the air inlet 11 is arranged on the side wall of the casing, and the air outlet is arranged on the top of the casing. The inclined direction of the photocatalytic unit 10 enables the cross-sectional dimension of the airflow space at the upper part in the shell to be larger than that of the airflow space at the lower part, namely, the airflow channel in the shell after being filtered by the photocatalytic unit 10 is in a shape with a large upper part and a small lower part, and the inclined arrangement mode not only can increase the air passing area, but also can enable the air passing to be more uniform (ensuring that the upper part and the lower part are both over-air, see fig. 2).

As further shown in fig. 1 and 2, a HEPA filter 14 is provided at the air flow front end of the photocatalytic unit 10, and the HEPA filter 14 is closely attached to the photocatalytic unit 10 and is inclined at an angle corresponding to the angle of inclination of the photocatalytic unit 10. The two groups of photocatalytic units 10 are arranged in the two opposite side walls of the shell and are symmetrically arranged. Each group adopts two photocatalytic units which are arranged in parallel. Preferably, but not limitatively, the inclination angle of the photocatalytic unit to the vertical plane is 5 to 15 degrees. The inclined angle can improve the air passing area (relative to vertical air inlet), and meanwhile, because the inclined flow fan is positioned at the top of the air flow channel in the shell, the negative pressure at the position, close to the inclined flow fan, of the upper part of the air flow channel is more remarkable, so that if the photocatalytic unit 10 is arranged in a mode of being vertical to the air inlet direction, air flow mainly concentrates to enter the air flow channel from the photocatalytic unit on the upper part, the air flow passing through the lower part is less, and the air passing is uneven.

As further shown in fig. 3-5, the photocatalytic unit includes: a photocatalytic plate and a plurality of ultraviolet LED light sources 161. The photocatalytic plate is a foamed ceramic plate 15 loaded with a photocatalytic active component. Ultraviolet LED light source 161 is UVA wave band LED light source and evenly distributed on the grid of grid lamp plate 16, and this grid lamp plate 16 and photocatalysis board parallel arrangement just separate one section distance for shine photocatalysis board. Preferably, but not limitatively, the spacing between the grille lamp panel 16 and the photocatalytic plate is 15mm, preferably to allow sufficient illumination.

Further, the used area of each foamed ceramic plate 15 is 243 × 265mm²The thickness is 10 mm.The open porosity of the foamed ceramic plate 15 is 70-90%, and the pore density is 8-60 ppi. Preferably, but not limitatively, the photocatalytic foamed ceramic plate 15 adopts a foamed alumina-based carrier as an open-cell foam structure, and the photocatalyst is a foamed alumina-based carrier loaded with TiO₂A photocatalyst. In the photocatalyst, TiO₂The crystal grains are embedded and dispersed on the outer surface of the photocatalyst, and TiO on the outer surface of the photocatalyst₂TiO of 5 to 50 μm particle size in the crystal grain₂The crystal grains account for more than 70 percent.

In one or more exemplary embodiments of the present invention, the ultraviolet LED light source is preferably a point light source. More preferably, the wavelength of the ultraviolet LED light source is 365 nm. By adopting the ultraviolet LED light source with the UVA wave band, the photoelectric efficiency can be improved, and the energy loss can be reduced. The wavelength of ultraviolet light emitted by the ultraviolet LED light source is 280-390 nm, and the ultraviolet light can be single wavelength or mixed wavelength.

As further shown in fig. 4 and 5, the foamed ceramic plate 15 and the grille lamp panel 16 are fixed together by a fixing frame 13. This fixed frame 13 is the rectangle structure that four frames are constituteed, all is equipped with the last draw-in groove 131 and the lower draw-in groove 132 of seting up inwards on every frame, goes up draw-in groove 131 and the thickness looks adaptation of grid lamp plate 16 and extends along the circumference of frame, goes up draw-in groove 131 and is used for the card to establish grid lamp plate 16. The lower engaging groove 132 is adapted to the thickness of the ceramic foam plate and extends along the circumferential direction of the frame, and the lower engaging groove 132 is used for engaging the ceramic foam plate 15. The angle code clamping groove 134 formed outwards is further formed in each frame, the frame structure of the fixing frame is formed by enclosing four frames, adjacent frames are fixed through the L-shaped angle codes 130, and the L-shaped angle codes 130 are buckled in the angle code clamping grooves in the end portions of the frames and fastened through studs. During the assembly photocatalysis unit 10, detain grid lamp plate 16 in last draw-in groove 131, detain foam ceramic plate 15 in draw-in groove 132 down, use four L shape angle sign indicating number 130 to fix four frames together (fixed through double-screw bolt locking), the lamp line is worn out the back along angle sign indicating number draw-in groove 134 extension and finally is qualified for the next round of competitions along trough 133 from the through-hole that sets up on one of them frame.

Preferably, the groove width of the upper clamping groove 131 is set to be 2.2mm according to the thickness of the grille lamp panel 16, and the groove width of the lower clamping groove 132 is set to be 11mm according to the thickness of the ceramic foam plate. The aforesaid through-hole that is used for the lamp plate to be qualified for next round of competitions sets up to 4 x 8 mm.

As further shown in fig. 2, under the driving action of the diagonal flow fan 17, the air inlet 11 is in a negative pressure suction state, and air in the indoor environment, which may contain organic waste gas or carry harmful bacteria or viruses, is sucked into the air inlet 11, and these gaseous organic pollutants include, but are not limited to: benzene, toluene, xylene, etc.; aldehydes, ketones, esters, and alcohol gases. The air flow enters the HEPA filter 14 from the air inlet grille at the air inlet 11, the effective rate of the HEPA filter 14 for 0.1 micron and 0.3 micron can reach 99.7%, the removal efficiency for particles with the diameter of more than 0.3 micron can reach more than 99.97%, the HEPA filter is the most effective filtering medium for pollutants such as smoke, dust and bacteria, and through the filtering, physical particles such as dust and PM2.5 are effectively filtered. After being filtered by the HEPA filter 14, the air flow obliquely passes through the foam ceramic plate 15 irradiated by the LED light source, namely, the foam ceramic plate 15 irradiated by the LED light source forms an inclined angle, the left air flow and the right air flow in the figure 2 enter the inclined flow fan 17 after being filtered and purified by the photocatalysis plate, and finally return to the indoor environment again from the air outlet 12, so that the circular filtration of the air is realized.

The utility model discloses a when the photocatalysis unit is used in air purifier, adopt two sets of arrangement methods, and two sets of modes that all adopt the slope air inlet. The mode that the air flow direction of adopting the air admission set up for the slope of photocatalysis board has both saved the volume of whole casing, has increased the cross-wind area on the unit photocatalysis board cross-section moreover, has reduced the windage, can effectively improve filtration efficiency, can make simultaneously cross-wind more even. The photocatalysis unit is fixed by the fixing frame, so that the fixation is firmer and the integrity is better. The utility model provides a photocatalysis unit can carry out efficient circulation purification treatment to indoor organic waste gas, can effectively kill harmful bacterium and virus simultaneously. The utility model discloses air purifier of decomposable organic matter function has good photocatalytic degradation performance, has good application prospect.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.

Claims (9)

1. A photocatalytic unit, characterized by comprising:

a photocatalytic plate which is a foamed ceramic plate loaded with a photocatalytic active component;

the ultraviolet LED light sources are UVA waveband LED light sources and are uniformly distributed on grid bars of a grid lamp panel, and the grid lamp panel is arranged in parallel with the photocatalytic plate and is spaced at a certain distance from the photocatalytic plate and is used for irradiating the photocatalytic plate;

and the fixing frame is used for fixing the foam ceramic plate and the grid lamp panel into a whole.

2. The photocatalytic unit according to claim 1, wherein the fixing frame is a rectangular frame structure comprising:

the upper clamping groove is matched with the thickness of the grille lamp plate and extends along the circumferential direction of the frame;

and the lower clamping groove is matched with the thickness of the foamed ceramic plate and extends along the circumferential direction of the frame.

3. The photocatalytic unit of claim 2, wherein the frame structure of the fixing frame is formed by enclosing four frames, adjacent frames are fixed by L-shaped corner connectors, and the L-shaped corner connectors are buckled in corner connector slots at the ends of the frames and fastened by studs.

4. The photocatalytic unit of claim 3, wherein one of the side frames has a through hole for a light wire to pass through and a wiring slot, and the light wire passes through the through hole, extends along the corner connector slot and passes through the wiring slot.

5. The photocatalytic unit of claim 1, wherein the grating lamp panel is 15mm from the photocatalytic plate.

6. The photocatalytic unit according to claim 1, wherein the foamed ceramic plate has an open cell content of 70 to 90% and a cell density of 8 to 60 ppi.

7. An air cleaner comprising the photocatalytic unit according to any one of claims 1 to 6, which is mounted in a housing of the air cleaner.

8. The air purifier of claim 7, wherein the air purifier adopts a side wall air inlet mode and a top air outlet mode; the two groups of photocatalytic units are respectively arranged in the two opposite side walls of the shell and are obliquely arranged relative to the vertical plane; two photocatalytic units are adopted in each group.

9. The air cleaner of claim 8, wherein the photocatalytic unit is inclined at an angle of 5 to 15 degrees from a vertical plane.

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