TWM586611U - Air purification device composed of photo-catalyst filter - Google Patents

Abstract

An air purification device composed of a photocatalyst filter includes an outer shell with an accommodation space inside, and an air inlet hole is provided on two sides of the front end of the outer shell, and at least one air outlet hole is provided on the two sides of the rear end; Activated carbon filter is located in the accommodating space adjacent to the air hole. It contains activated carbon components, which can effectively filter fine molecules containing PM2.5 particles. A fan is installed on the back side of the activated carbon filter. A photocatalyst The filter screen is composed of a metal mesh composed of embedded TiO2 nano-particles, which is arranged behind the fan and allows the air drawn from the fan through the air holes to pass through the photocatalyst filter; and an LED UV photocatalyst lamp set is arranged in the container. In the space, it contains several LED grains that can produce UV light sources, which are used to generate light sources with a UV wavelength in the range of 250 to 400 nm. The light source of the LED UV photocatalyst lamp group is irradiated with a photocatalyst filter to generate free radical molecules. The toxic gas molecules are automatically decomposed to purify the air; thereby, a photocatalyst air purification device with filtering fine particles and automatically decomposing harmful substances in the organism is combined.

Description

Air purification device composed of photocatalyst filter

This creation relates to an air purification device composed of a photocatalyst filter, especially a photocatalyst air purification device that can effectively purify the air.

According to the photocatalyst is a product developed in combination with ultraviolet light source. The principle of photocatalyst is to use the energy of light and nano titanium dioxide (TiO2) as a catalyst to initiate a series of chemical reactions. Specifically, when the catalyst material passes light Irradiation at a wavelength will generate electrons and holes, and interact with water molecules and oxygen molecules in the air to generate hydroxide ions OH¯, which can easily cut off the molecular binding of organic matter and cause it to decompose. Using this effect can air The malodorous chemical substances in it are simply decomposed into "harmless substances". Therefore, the photocatalyst has functions such as deodorization, antibacterial, anti-mold, and decomposition of dirt. Photocatalysts have been widely studied and applied to environmental protection, energy, sterilization, and self-cleaning. Since 1972, Fujishma and Honda first published in the journal Nature that TiO2 will decompose water to produce H2 and O2 after exposure to light. Many people have invested in research related to the photocatalytic properties of TiO2, and worked on various possible modification methods to improve the effect of TiO2 photocatalyst.

In the second press, the crystal structure of TiO2 includes three types of high-temperature rutile type, low-temperature anatase type, and brookite type that belong to orthorhombic system. However, only the anatase structure has the effect of photocatalyst. Due to its excellent photocatalyst and super hydrophilic properties, it has become a competitive product in the industry. Traditionally, electrochemical anodic oxidation is used to prepare TiO2. Most of them use titanium blocks as the substrate, and their application range is limited; other manufacturing methods If the titanium block is directly immersed in a strong alkali solution, a TiO2 film with a porous structure can be formed. However, the immersion time of the process generally requires at least several hours, and it is often necessary to warm it to more than 60 ° C.

Sintering nanometer TiO2 on the ceramic surface at high temperature, because the high temperature control is not easy, the production cost is too high and red nanostone produced by the nano anatase particles loses the photocatalyst function or the efficiency is not good.
The TiO2 is coated on the surface of the utensil with a resin, but it is susceptible to poor adhesion of the resin or insufficient cleaning of the TiO2 surface, which causes the surface particles to peel off for a long time or the resin's masking performance is reduced, and the performance cannot be achieved.

Therefore, although TiO2 has excellent photocatalytic properties, there are still many technical problems to be overcome in practical applications, especially how to combine TiO2 with metal mesh and other substrates without falling off. This is a technology to be overcome. problem.

The main purpose of this creation is to provide an air purification device composed of a photocatalyst filter. The filter is a metal mesh consisting of embedded titanium dioxide nanoparticles. After being irradiated with UV light, free radical molecules can be automatically decomposed and poisonous. Gas molecules have the effect of purifying the air.

In order to achieve the above purpose, the technical means used in this creation includes: an outer casing with an accommodation space inside, and two air inlets at the front end of the outer casing, and at least one outlet at the two rear ends. Air holes; an activated carbon filter is located in the accommodation space adjacent to the air inlet, which contains activated carbon components, which can effectively filter fine molecules containing PM2.5 particles; a fan is installed on the activated carbon The rear side of the filter; a photocatalyst filter is composed of a metal mesh containing embedded TiO2 nano particles, which is arranged behind the fan and allows the air drawn by the fan from the air inlet to pass through the photocatalyst A filter screen; and an LED UV photocatalyst lamp set, which is arranged in the accommodating space and contains several LED crystal grains capable of producing a UV light source for generating a light source with a UV wavelength ranging from 250 to 400 nm, and The light source of the LED UV photocatalyst lamp group irradiates the photocatalyst filter, which can generate free radical molecules to automatically decompose toxic gas molecules to purify the air; thereby, a photocatalyst air with filtering fine particles and automatically decomposing harmful substances in the organism can be combined. Purification device.

According to the previously disclosed characteristics, the metal mesh may include a member selected from the group consisting of: iron mesh, stainless steel mesh and copper mesh.

According to the previously disclosed characteristics, the material of the outer casing may include: a pipe body or any shape made of any one of stainless steel, ceramic, acrylic, and PET.

According to the characteristics of the previous disclosure, the photocatalyst filter system can be a metal mesh with a pore size of 10 to 200mech, and is composed of degreasing, pre-soaking, and activation procedures followed by electroplating. About 5ppm ～ 2.0 g / l of TiO2 particles, containing about 3g / l ～ 7g / l of N ^{2+ in the} plating bath, about 10 ～ 30 g / l of sodium hypophosphite, pH 6 ～ 10, plating bath temperature 40 ℃ ～ 60 ℃, current density is 10 ～ 35AsF; TiO2 particles are evenly distributed and embedded on the metal mesh, so as to make a photocatalyst filter.

With the help of the above-mentioned technique, this photo creation process is made by degreasing → pre-soak → activation → plating to achieve the photocatalytic filter screen with nano-sized TiO2 particles evenly distributed on the filter screen. Sintering does not require the use of resin spraying to cause the TiO2 particles to fail; therefore, it can prevent the TiO2 particles from falling off and improve the effect of edible life. Further, a photocatalyst air purification device composed of the photocatalyst filter can effectively decompose harmful gas molecules into harmless components and release clean gas to achieve the effect of purifying air.

The following description uses the drawings as examples, but is not limited to this. The creation can be implemented in other embodiments, and well-known steps or elements have not been described in details to avoid unnecessary restrictions on the creation . It is particularly noted that the drawings are for illustration purposes only and do not represent the actual size or number of components. Some details may not be fully drawn in order to make the drawings concise.

First, please refer to FIG. 1 to FIG. 4. This method of creating a photocatalyst filter 10 includes the following steps:
a) Provide a filter screen 11, the filter screen is composed of a metal mesh 11 with an aperture of 10-200mech; in this embodiment, the metal mesh 11 may be selected from: iron mesh, stainless steel mesh and copper mesh, but not Limited to this
b) Provide a degreasing program: use surfactant or alkali chemicals as degreasing materials to clean the surface of the filter screen 11 to prevent the penetration of grease from affecting the cleanliness of subsequent processes;
c) Provide a pre-preg procedure: the pre-preg function is mainly to remove the residual surfactant and alkali chemicals after degreasing;
d) providing an activation procedure: mainly to activate the surface of the filter screen 11 to prevent debris from remaining on the surface of the filter screen 11 and affect the post-plating operation; and
e) Provide a plating process: This plating process includes copper plating, nickel plating, and silver plating processes. The plating bath in the process contains TiO2 particles with a particle size of 5 to 100 nm and a concentration of about 5 ppm to 2.0 g / l. The plating bath It contains N ²⁺ about 3g / l ～ 7g / l, sodium hypophosphite about 10 ～ 30 g / l, PH value 6 ～ 10, plating bath temperature 40 ℃ ～ 60 ℃, current density 10 ～ 35AsF;
f) In this way, the TiO2 particles 12 can be deposited and plated on the filter screen 11 in a uniform distribution, so as to form a photocatalyst filter screen 10.

To further explain, in general, when TiO2 is prepared at low temperatures, most of them form amorphous particles, which must be calcined at about 300 ° C to form anatase crystals. This type of crystals have photocatalytic effects, but some carriers, such as general Glass, leather, cloth, etc. cannot withstand this high temperature. This creation reveals that anatase nanocrystalline particles are formed during preparation. When coated on the carrier, it does not need to be calcined at high temperature.

It is further explained that the photocatalyst filter screen 10 of this creation is made by using a lift-up technique. The manufacturing process of the photocatalyst filter screen 10 includes procedures such as degreasing, prepreg, activation, and electroplating. Deposition of nano-sized TiO2 particles 12 with uniform plating is achieved on the filter screen 11 without sintering at high temperature or using resin spraying (which will accelerate the aging and peeling of resin after UV light irradiation) to cause the TiO2 particles 12 to fail. Therefore, it can be permanently deposited on the filter screen 11 to improve the effect of preventing the TiO2 particles 12 from falling off.

FIG. 3 is an enlarged view of the photocatalyst filter screen 10. It can be clearly seen from the enlarged screen of the filter screen 11 that the nano-TiO 2 particles 12 are evenly distributed on the screen 11. When a toxic gas flows over the surface of the TiO2 particles 12 that have been stimulated, free radicals released on the surface of the TiO2 decompose harmful gas components.

Please continue to refer to FIG. 4. The photocatalyst filter screen 10 made by the above-mentioned disclosure method, and a photocatalyst air purification device 60 further comprising:

An outer casing 20 having an accommodating space 21 therein, and two front ends of the outer casing 20 are provided with air inlet holes 22, and two rear ends of the outer casing 20 are provided with at least one air outlet hole 23; in this embodiment, the outer casing The material of the body may include: a pipe body or any shape made of any one of stainless steel, ceramic, acrylic, and PET.

An activated carbon filter 30 is arranged in the accommodating space 21 adjacent to the air inlet 22, and contains an activated carbon component, which can effectively filter fine molecules containing PM2.5 particles; a fan 40 is arranged at the active The rear side of the carbon filter 30; in this embodiment, the particles introduced by the activated carbon filter 30 as air constitute a filtering function and adsorb a small amount of toxic gas. In other words, the activated carbon filter 30 has a primary filtering function.

A photocatalyst filter screen 10 is composed of a metal mesh 11 containing embedded TiO2 nano-particles 12, and is arranged behind the fan 40, and the air drawn by the fan 40 from the air inlet hole 22 passes through the photocatalyst. Strainer 10; in this embodiment, the photocatalyst strainer 10 is made by using the technique of lift-off, and the nano-sized TiO2 particles 12 are evenly distributed and deposited on the strainer 11 to prevent the TiO2 from falling off and improve the use. The effect of life.

An LED UV photocatalyst lamp group 50 is disposed in the accommodating space 21 and includes a plurality of LED crystal grains 51 capable of producing a UV light source for generating a light source with a UV wavelength in a range of 250 to 400 nm. The light source of the LED UV photocatalyst lamp group 50 illuminates the photocatalyst filter screen 10, which can generate free radical molecules to automatically decompose toxic gas molecules to purify the air;

Thereby, a photocatalyst air purification device 60 having a function of filtering fine particles and automatically decomposing harmful substances in the organism is combined.

The principle applied in this creation, the photodecomposition mechanism of the photocatalytic treatment program is to stimulate the photocatalyst by ultraviolet light or sunlight to cause the catalyst to generate electrons and holes, thereby oxidizing the substances adsorbed on the surface, and then cracking the substances adsorbed on the surface into Small molecule. Taking TiO2 as an example, the TiO2 reaction starts from the light wavelength of 250 to 400nm (because the energy step difference of TiO2 is about 3.1eV, and the light wavelength of 400nm can provide about 3.1eV energy), TiO2 absorbs light energy to generate electrons (e -) And hole (h +), this hole has a fairly strong oxidizing power, which can directly oxidize pollutant molecules adsorbed on the surface of the material to decompose, or oxidize water molecules adsorbed on the surface of the material to hydrogen and oxygen free (‧OH). The pollutants of the original macromolecules are broken down into small molecules by photocatalytic light reaction to achieve the purpose of removing the pollutants.

In this embodiment, the fan 40 can start the operation of the fan 40 through an external power supply, and provide the entire air flow force of the photocatalyst air cleaning device 60, which is activated simultaneously through the LED UV photocatalyst lamp group 50 and the photocatalyst filter screen 10. Provides decomposition of toxic gases and air cooling.

FIG. 4 shows a preferred embodiment of a photocatalyst air purification device 60. The photocatalyst filter screen 10 is embedded with a nano-grade anatase TiO2 particle 10 on the filter screen 12 by a plating method. After the power is turned on, the air starts to flow from bottom to top. After filtering through the activated carbon 30, the air flows through the photocatalyst screen 10 and comes into contact with the TiO2 on the screen. The surface of the TiO2 particles 12 has been exposed to UV radiation to generate free radical reactions. After the air collides with free radicals, it can decompose harmful gas molecules into harmless components and release clean gas to achieve the function of purifying air.

With the help of the technique of demolition, the photocatalyst filter screen 10 is produced by degreasing → pre-immersion → activation → electroplating, etc., so that the embedded plating of nano-sized TiO2 particles 12 is evenly deposited on the filter screen 11. Need to go through high temperature sintering, and do not need to use resin spraying to cause the TiO2 particles 12 to fail; therefore, it can prevent the TiO2 particles 12 from falling off and improve the effect of edible life. Further, the photocatalyst air purification device 60 composed of the photocatalyst filter screen 10 can effectively decompose harmful gas molecules into harmless components and release clean gas to achieve the function of purifying air.

In summary, the structure disclosed in this creation is unprecedented, and it can indeed achieve the improvement of efficacy, and it can be used by the industry. It is fully in line with the new patent requirements. No sense of virtue.

However, the drawings and descriptions disclosed above are only the preferred embodiments of this creation, and modifications or equivalent changes made by those skilled in the art in accordance with the spirit of this case should still be included in the scope of patent application for this case.

10‧‧‧Photocatalyst filter

11‧‧‧ Filter

12‧‧‧TiO2 particles

20‧‧‧ Outer shell

21‧‧‧ accommodation space

22‧‧‧air inlet

23‧‧‧outlet

30‧‧‧ activated carbon filter

40‧‧‧fan

50‧‧‧LED UV Photocatalyst Light Unit

51‧‧‧LED die

60‧‧‧Photocatalyst air purification device

Figure 1 is a flow chart of the implementation steps of the manufacturing method of the photocatalyst filter.
Figure 2 is a perspective view of the appearance of this photocatalyst filter.
FIG. 3 is an enlarged view of a part of the structure in FIG. 2.
Figure 4 is a structural diagram of the photocatalyst air purification device of this creation.

Claims (4)

An air purification device composed of a photocatalyst filter includes:
An outer casing having an accommodation space inside, and an air inlet hole is provided on two sides of the front end of the outer casing, and at least one air outlet hole is provided on the two sides of the rear end;
An activated carbon filter is located in the accommodating space adjacent to the air inlet, and contains activated carbon components, which can effectively filter fine molecules containing PM2.5 particles;
A fan is arranged on the rear side of the activated carbon filter;
A photocatalyst filter is composed of a metal mesh composed of embedded TiO2 nano-particles, which is arranged behind the fan and allows the air drawn by the fan from the air inlet to pass through the photocatalyst filter; and an LED The UV photocatalyst lamp group is arranged in the accommodating space, and contains several LED grains capable of producing a UV light source to generate a light source with a UV wavelength ranging from 250 to 400nm, and the LED UV photocatalyst lamp group The light source illuminates the photocatalyst filter, which can generate free radical molecules to automatically decompose toxic gas molecules to purify the air;
In this way, a photocatalyst air purification device with filtering fine particles and automatically decomposing harmful substances in the organism is combined. The air purification device composed of a photocatalyst filter screen as described in item 1 of the scope of the patent application, wherein the metal mesh may include a metal mesh, a stainless steel mesh, and a copper mesh. According to the air purifying device composed of a photocatalyst filter described in item 1 of the scope of the patent application, the material of the outer shell may include: a pipe body made of any one of stainless steel, ceramic, acrylic, and PET Or any shape. The air purification device composed of a photocatalyst filter according to item 1 of the scope of application for a patent, wherein the photocatalyst filter is a metal mesh with a pore size of 10-200mech.
It consists of electroplating after pre-dip and activation procedures. It includes TiO2 particles with a particle size of 5 to 100 nm and a concentration of about 5 ppm to 2.0 g / l in a plating bath. The plating bath contains about 3 g / l of N ²⁺ to 7g / l, sodium hypophosphite about 10-30 g / l, PH value 6-10, plating bath temperature 40 ℃ -60 ℃, current density 10-35AsF; TiO2 particles are evenly distributed and embedded in the metal mesh According to this, a photocatalyst filter is made.