Photocatalytic air purification device

Abstract

The utility model discloses a kind of photocatalytic air purification devices, it includes photocatalytic unit, photocatalytic unit includes substrate and photocatalyst layer, the honeycomb shape is arranged with several oblique holes of the substrate both sides, oblique hole is inclined to the surface of substrate, and photocatalyst layer is at least arranged in the inner wall of oblique hole.The utility model is arranged with the oblique hole of honeycomb shape on photocatalytic unit, to increase the depth of hole, form the inner wall of more area to adhere photocatalyst layer, to improve photocatalytic purification effect.The utility model discloses a kind of photocatalytic air purification devices, it includes photocatalytic unit, photocatalytic unit includes substrate and photocatalyst layer, the honeycomb shape is arranged with several oblique holes of the substrate both sides, oblique hole is inclined to the surface of substrate, and photocatalyst layer is at least arranged in the inside wall of oblique hole.The utility model is arranged with the oblique hole of honeycomb shape in photocatalytic unit, to increase the depth of hole, form the inner wall of more area adheres photocatalyst layer, to improve photocatalytic purification effect.

Description

Technical Field

[0001] This utility model relates to the field of air purification devices, and in particular to a photocatalytic air purification device. Background Technology

[0002] Current photocatalytic units mainly consist of photocatalysts and ultraviolet light source devices. The photocatalyst needs to be attached to the surface of a carrier. The main carrier types are foam-like carriers (such as foamed alumina substrates) and honeycomb carriers (honeycomb alumina substrates). Foam-like carriers have more pores, thus having a larger surface area, allowing for the covering of more photocatalyst; however, they have higher air resistance, which affects airflow. In honeycomb carriers, because the honeycomb pores are perpendicular to both sides of the substrate, their surface area is relatively small, affecting the purification effect.

[0003] Chinese Patent Publication No. CN110871061A, published on March 10, 2020, discloses a photocatalytic unit and its photocatalytic method. The photocatalyst includes a photocatalyst and an ultraviolet light source. The photocatalyst is a TiO2 photocatalyst supported on a foamed alumina-based support, wherein the foamed alumina-based support has an open-cell foam structure. This photocatalytic unit exhibits good catalytic activity and stability when used for gas purification, but it suffers from high wind resistance and requires further improvement. Utility Model Content

[0004] The purpose of this invention is to provide a photocatalytic air purification device with a reasonable structure, a large purification contact area, and low wind resistance.

[0005] The purpose of this utility model is achieved as follows: A photocatalytic air purification device includes a photocatalytic unit, which includes a substrate and a photocatalyst layer. The substrate has a plurality of oblique holes arranged in a honeycomb pattern penetrating both sides of the substrate. The oblique holes are inclined relative to the surface of the substrate. The photocatalyst layer is disposed at least on the inner wall of the oblique holes.

[0006] The objective of this invention can also be achieved by the following technical measures: As a more specific embodiment, the substrate is a ceramic substrate, and the relative tilt angle α between the oblique hole and the substrate surface is 30 degrees to 50 degrees.

[0007] As a further embodiment, the pore shape of the oblique hole is a round hole, a square hole, or a regular hexagonal hole, and the thickness H of the photocatalyst layer is 50 nm-200 nm.

[0008] As a further embodiment, the photocatalyst layer is a gel-deposited nanostructured titanium dioxide layer; the diameter of the circular holes is 1.5mm-3mm, the side length of the square holes is 1.5mm-3mm, the distance between opposite sides of the regular hexagonal holes is 1.5mm-3mm, and the wall thickness between adjacent oblique holes is 0.2mm-1.2mm; the substrate is a cordierite ceramic substrate or an alumina ceramic.

[0009] As a further embodiment, one side of the photocatalytic unit is also provided with an ultraviolet light source for irradiating the photocatalyst layer.

[0010] As a further embodiment, the photocatalytic unit is provided with an external frame; the ultraviolet light source is disposed on the slats and faces the photocatalytic unit.

[0011] As a further embodiment, the slats are arranged in a louvered shape, with the slats and the inclined holes aligned in the same direction, and the angle β between the slats and the air intake direction of the frame is 15 degrees to 45 degrees.

[0012] The beneficial effects of this utility model are as follows: (1) The photocatalytic unit of this utility model has honeycomb-shaped oblique holes, which increases the depth of the holes and forms an inner wall with a larger area of ​​photocatalyst layer to improve the photocatalytic purification effect.

[0013] (2) The photocatalytic unit of this utility model adopts a honeycomb structure, which has lower wind resistance compared with the air-permeable foam material, which is conducive to air circulation and noise reduction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the photocatalytic unit in this utility model.

[0015] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure.

[0016] Figure 3 for Figure 2 Enlarged structural diagram at point B.

[0017] Figure 4 This is a cross-sectional structural diagram of the photocatalytic air purification device of this utility model.

[0018] Figure 5 This is a schematic diagram of the frame structure in this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figures 1-5As shown, a photocatalytic air purification device includes a photocatalytic unit 10, which includes a substrate 1 and a photocatalyst layer 2. The substrate 1 has a plurality of oblique holes 11 arranged in a honeycomb pattern through both sides of the substrate 1. The oblique holes 11 are inclined relative to the surface of the substrate 1. The photocatalyst layer 2 is at least disposed on the inner wall of the oblique holes 11.

[0020] The substrate 1 is a ceramic substrate 1, and the relative tilt angle α between the oblique hole 11 and the surface of the substrate 1 is 30 degrees to 50 degrees.

[0021] The oblique holes 11 are circular, square, or hexagonal in shape, and the photocatalyst layer 2 has a thickness H of 50 nm-200 nm. The photocatalyst layer 2 is a gel-deposited nanostructured titanium dioxide layer; the circular holes have a diameter of 1.5 mm-3 mm, the square holes have a side length of 1.5 mm-3 mm, the hexagonal holes have a side-to-side distance of 1.5 mm-3 mm, and the wall thickness between adjacent oblique holes 11 is 0.2 mm-1.2 mm; the substrate 1 is a cordierite ceramic substrate 1 or an alumina ceramic substrate. In this embodiment, the oblique holes 11 are hexagonal in shape.

[0022] The photocatalytic unit 10 is also provided with an ultraviolet light source 4 for irradiating the photocatalyst layer 2 on one side.

[0023] The photocatalytic unit 10 is provided with a frame 5; the ultraviolet light source 4 is disposed on the strip 3 and faces the photocatalytic unit 10.

[0024] The slats 3 are arranged in a louvered shape, and the slats 3 are aligned with the inclined holes 11. The angle β between the slats 3 and the air inlet direction C of the frame 5 is 15-45 degrees. When air enters the frame 5 in the direction of arrow C, the slats 3 help to guide the airflow into the inclined holes 11.

[0025] The frame 5 has a cavity inside its frame, and a control circuit can be installed inside the cavity. The control circuit is used to electrically connect with the ultraviolet light source 4. The inner wall of the frame 5 has a groove 51 corresponding to the end of the slat 3, and the end of the slat 3 is placed in the groove 51.

[0026] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A photocatalytic air purification device, comprising a photocatalytic unit (10), the photocatalytic unit (10) comprising a substrate (1) and a photocatalyst layer (2), characterized in that: The substrate (1) has a number of oblique holes (11) arranged in a honeycomb pattern, penetrating both sides of the substrate (1). The oblique holes (11) are inclined relative to the surface of the substrate (1), and the photocatalyst layer (2) is at least disposed on the inner wall of the oblique holes (11).

2. The photocatalytic air purification device according to claim 1, characterized in that: The substrate (1) is a ceramic substrate (1), and the relative tilt angle α between the oblique hole (11) and the surface of the substrate (1) is 30 degrees to 50 degrees.

3. The photocatalytic air purification device according to claim 1, characterized in that: The pore shape of the oblique hole (11) is a round hole, a square hole or a regular hexagonal hole, and the thickness H of the photocatalyst layer (2) is 50 nm-200 nm.

4. The photocatalytic air purification device according to claim 3, characterized in that: The photocatalyst layer (2) is a gel-deposited nano-structured titanium dioxide layer; the diameter of the round hole is 1.5mm-3mm, the side length of the square hole is 1.5mm-3mm, the distance between opposite sides of the regular hexagonal hole is 1.5mm-3mm, and the wall thickness between adjacent oblique holes (11) is 0.2mm-1.2mm; the substrate (1) is a cordierite ceramic substrate (1) or alumina ceramic.

5. The photocatalytic air purification device according to claim 1, characterized in that: The photocatalytic unit (10) is also provided with an ultraviolet light source (4) for irradiating the photocatalyst layer (2) on one side.

6. The photocatalytic air purification device according to claim 5, characterized in that: The photocatalytic unit (10) is provided with a frame (5); the ultraviolet light source (4) is disposed on the slats (3) and faces the photocatalytic unit (10).

7. The photocatalytic air purification device according to claim 6, characterized in that: The slats (3) are arranged in a louver shape, and the slats (3) are aligned with the inclined holes (11). The angle β between the slats (3) and the air inlet direction of the frame (5) is 15 degrees to 45 degrees.

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