CN201131951Y - Air sterilization and purification device - Google Patents

Abstract

An air sterilization and purification device, comprising a cavity (9) composed of a device casing (6) with an air inlet (7) and an air outlet (8), and a UV-C ultraviolet visible light lamp installed in the cavity (9) (3), characterized in that: a shading plate (5) is provided on the side of the UV-C ultraviolet visible light lamp (3) close to the air outlet (8). The cavity (9) is also equipped with an oxygen ion sterilizing integrated generator (2), a photocatalyst honeycomb filter (1), and a UV-A ultraviolet lamp (4) whose light can directly irradiate the photocatalyst honeycomb filter (1). The photocatalyst honeycomb filter screen (1) is an aluminum-based nano photocatalyst activated carbon honeycomb filter screen (1). The device has the advantages of low manufacturing cost, strong sterilizing ability and convenient maintenance, and each component can be maintained and replaced separately.

Description

Air sterilization and purification device

1. Technical field

The utility model relates to an air sterilizing and purifying device mainly used for air purifying equipment such as air outlets of central air conditioners or air purifiers.

2. Background technology

At present, there are two widely used technologies for air sterilization and purification devices:

One is to pass the air through the ultraviolet luminous body coated with nano-photocatalyst to achieve the purpose of purification, but the cost is high; the other is to use the combination of nano-photocatalyst filter adsorption and visible light ultraviolet lamp, but the bactericidal ability is poor.

Also check the public information to know:

1.CN200480034869.2 The photocatalytic oxidation air purification system adopts the principle of nano photocatalyst coating and microwave excitation;

2. CN200610089326, 1 The method and device for purifying air by ultraviolet irradiation in an ozone atmosphere adopts the principle of ultraviolet and ozone sterilization;

3.CN200510033625.9 A photocatalytic oxidation indoor air purification device adopts: ① a generator integrating ozone and negative ions, ② UV-A ultraviolet lamp, ③ nano photocatalyst activated carbon composite aluminum-based honeycomb filter;

4. The products of Shanghai Sanke Environmental Protection Technology Co., Ltd. adopt nano-photocatalyst filter screen and ultraviolet synthesis technology.

The following is a brief introduction of the company's products: On April 29, 2007, the product was tested by the Shanghai Academy of Preventive Medicine. The resistance of the device: 45.1Pa, the wind speed: 3.1m/s, the purification rate of particulate matter reached 59.8% in one pass, cfu/ m ³ elimination rate reached 81.3% in one pass.

3. Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the existing technology and propose an air sterilization and purification device with low cost and strong sterilization ability.

The object of the present invention is achieved like this: a kind of air sterilizing and purifying device, comprises the cavity (9) that is made of device shell (6) with air inlet (7) and air outlet (8), is contained in cavity (9) The UV-C ultraviolet visible light lamp (3) in ) is characterized in that: the UV-C ultraviolet visible light lamp (3) is provided with a shading plate (5) on the side (generally the side visible to the naked eye) near the air outlet (8) . The shading plate (5) has at least two functions: 1. Make the UV-C ultraviolet visible light lamp (3) fully sterilize the airflow; 2. Prevent the UV-C ultraviolet visible light from stimulating the human body.

A further solution is: the cavity (9) can also be equipped with an oxygen ion sterilizing integrated generator (2) and/or a photocatalyst honeycomb filter (1).

A further scheme is: the cavity (9) can also be equipped with a UV-A ultraviolet lamp (4) whose light can directly shine on the photocatalyst honeycomb filter screen (1).

A further solution is: the photocatalyst honeycomb filter (1) is an aluminum-based nano photocatalyst active carbon honeycomb filter (1).

In the utility model:

1. Aluminum-based nano photocatalyst activated carbon honeycomb filter:

Widely used in the treatment of organic gases containing toluene, xylene, benzene and other benzenes, phenols, esters, alcohols, aldehydes and other organic gases, malodorous gases and microbial bacteria.

Features:

1. Aluminum-based honeycomb carrier with through-hole structure. Compared with other filters, it has better aerodynamic performance, smaller bulk density, larger specific surface area, higher adsorption and decomposition efficiency, and smaller drag coefficient.

2. The carrier uses high-quality, high-adsorption nano-photocatalyst and activated carbon as the adsorption material, which has a fast adsorption and decomposition speed and a large saturated adsorption capacity.

The working principle of nano photocatalyst:

It can strongly adsorb and decompose harmful substances in the air. Because nanomaterials have a large surface area, one gram of nanopowder can have a surface area of hundreds of square meters. Adsorb impurities on its surface to reduce the concentration of harmful substances in the air.

It also has the characteristics of photocatalysis, that is, it decomposes organic matter under light conditions. It can be used to kill bacteria and viruses, and can also solve the problem of adsorption saturation of harmful substances. The principle is that nanomaterials have photo-semiconductor effects, and after absorbing light energy, holes and electron pairs can be generated. The hole and electron pairs decompose water into strong oxidizing hydroxyl groups and active oxygen, which can oxidize and decompose harmful substances. For example: bacteria, viruses and other microorganisms are also mainly composed of proteins and enzymes. The active oxygen generated by the photocatalytic effect denatures the proteins and enzymes to kill or inhibit microorganisms; the main indoor chemical pollutants are organic chemicals, and the photocatalytic effect produces The hydroxyl groups and active oxygen in the air can oxidize organic chemicals into harmless inorganic substances such as carbon dioxide and water, which help to clean the air.

How activated carbon works:

Activated carbon is the most commonly used air purification material, which is mainly used to absorb trace amounts of toxic gases in the air. The high-efficiency catalytic activated carbon impregnated with a variety of catalysts has a purification capacity of 5-20 times that of ordinary ones, and its adsorption changes from physical adsorption to chemical adsorption at the same time.

2. Ultraviolet light

The principle of ultraviolet light to kill microorganisms is: the ultraviolet light generated will penetrate its cell membrane and nucleus, destroy the molecular bonds of DNA, and make it lose its ability to replicate or lose its activity. Because cells cannot replicate, microorganisms will die soon, and ultraviolet light will also have a cumulative effect on microorganisms that have been irradiated by it. For microorganisms that are not killed the first time, they will be killed in subsequent cycles. Ultraviolet rays directly destroy the DNA molecular bonds of cells, making them lose their ability to reproduce. Therefore, it can be said that ultraviolet sterilization is the fundamental solution.

The absorption capacity of ultraviolet rays reaches 0.2 microns, which quickly gathers floating particles, dust, smoke, and planktonic bacteria in the air, and combines nano photocatalyst technology to efficiently decompose harmful substances in the air without secondary pollution.

The main purpose of the UV-C ultraviolet visible light lamp used in this device is to kill microorganisms, and the main purpose of the UV-A ultraviolet lamp is to correspondingly excite the photocatalyst to achieve the best effect, so that the photocatalyst activated carbon filter can always keep the working surface clean.

3. Oxygen ion sterilization integrated generator (ozone, negative ion)

Sterilization principle of ozone: Ozone has unstable characteristics and strong oxidation ability. Since ozone is composed of an oxygen atom carried by an oxygen molecule, it is determined that it is only a temporary storage form. The oxygen atom carried is used in addition to oxidation, and the rest is combined into oxygen to enter a stable state.

The application of ozone is mainly in artificial sterilization. This is mainly because ozone has a strong oxidation ability. Oxygen atoms can oxidize the cell wall of bacteria until they penetrate the cell wall and combine with the unsaturated bonds in the body to capture the life of bacteria. Its effect is completed immediately, and the rapid sterilization effect of ozone determines due to its high reduction potential.

The safe concentration of ozone stipulated by the Ministry of Health is 0.1ppm, and the industrial hygiene standard is 0.15ppm. The labor protection department stipulates that the work is allowed to work at a safe concentration for no more than 10 hours; the U.S. Environmental Protection Agency stipulates that the ozone concentration standard is 8 hours. Below ppm (1 ppm ozone=1.963 mg/m ³ ).

The principle of negative ion sterilization: negative ions have the functions of fresh air, sterilization, medical treatment and health care, and are called "vitamins in the air". Negative ions have been confirmed by the medical community as an effective means of killing germs and purifying the air. Its mechanism mainly lies in the combination of negative ions and bacteria, which causes the bacteria to produce structural changes or energy transfers, which promotes the death of bacteria, achieves the purpose of disinfection and sterilization, and rapidly reduces the bacteria in the air. At the same time, negative ions are easily adsorbed with tiny pollution particles in the air, becoming charged large ions, which sink to the ground, thereby purifying the air. The most suitable negative ion concentration for the human body is 10 ⁶ psc/cm ³ . The amount of negative ions in the air can promote the metabolism of the human body, purify the blood, strengthen cell function, beautify the skin, calm the nerves, eliminate insomnia and anxiety, and also have therapeutic effects on asthma, bronchitis, allergic rhinitis and other diseases.

When the ozone concentration is 0.03ppm and the negative ion concentration is 10 ⁶ psc/cm ³ , the bactericidal ability is 10 times higher than that of any one used alone, and the bactericidal rate is above 94%.

The utility model has the following positive effects: the utility model is a building block component of a high-efficiency air sterilization and purification device, and is suitable for air outlets of central air conditioners or air purifiers of various specifications. The device integrates purification technologies such as nano-photocatalyst, activated carbon, negative ions, ozone, ultraviolet rays, and honeycomb metal filter. The adsorption rate and decomposition are improved, and the filter contact area of fresh air is increased. Because the device uses ultraviolet lamps with wavelengths UV-C to kill bacteria and microorganisms and UV-A ultraviolet lamps to make the nano-photocatalyst activated carbon composite filter achieve the best effect, and the compound application of negative ions and ozone improves the sterilization ability by 10 about times. Tested by the relevant department, the air colony number extinction rate of the device reaches an average of over 98%. The device is easy to maintain, and each component can be maintained and replaced separately.

4. Description of drawings

Fig. 1 is a schematic diagram of the main structure of the utility model.

In the figure: 1. Photocatalyst honeycomb filter, 2. Oxygen ion sterilization integrated generator, 3. UV-C ultraviolet visible light lamp, 4. UV-A ultraviolet lamp, 5. Shading plate, 6. Device shell, 7. Intake Air outlet, 8. air outlet, 9. cavity.

5. Specific implementation

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, a kind of air sterilization and purification device comprises a cavity formed by the device shell with an air inlet and an air outlet, and a UV-C ultraviolet visible light lamp installed in the cavity, characterized in that: UV-C ultraviolet visible light A light shielding plate is arranged on the side of the light near the air outlet.

The cavity is also equipped with an oxygen ion sterilizing integrated generator, an aluminum-based nanophotocatalyst activated carbon honeycomb filter and a UV-A ultraviolet lamp whose light can directly shine on the aluminum-based nanophotocatalyst activated carbon honeycomb filter.

The design parameters of the prototype are: an aluminum-based honeycomb filter screen treated with nano-photocatalyst and activated carbon electrophoresis coating, with a pore diameter of 5mm and a thickness of 5-10mm, installed on the front inner side of the air outlet grille. An oxygen ion sterilization integrated generator with an ozone concentration of ≤0.05ppm and an anion concentration of ≤5×10 ⁶ psc/cm ³ , connected to 220V mains, and installed at a distance of 30-50mm inside the tuyere frame. One U-shaped 18-watt ultraviolet lamp with a wavelength of UV-A, connected to 220V mains, installed at a distance of 30-50mm inside the frame of the air outlet. One U-shaped 18-watt ultraviolet lamp with a wavelength of UV-C, connected to 220V mains, installed at a distance of 30-50mm inside the frame of the windward opening. Galvanized steel plate with aluminum foil shading plate, its size should be larger than the lamp tube body, installed between UV-C ultraviolet visible light lamp and UV-A ultraviolet lamp.

Claims (5)

1. An air sterilizing and purifying device, comprising a cavity (9) composed of a device casing (6) with an air inlet (7) and an air outlet (8), and the UV-C ultraviolet rays contained in the cavity (9) The visible light lamp (3) is characterized in that a shading plate (5) is provided on the side of the UV-C ultraviolet visible light lamp (3) close to the air outlet (8). 2. The air sterilization and purification device according to claim 1, characterized in that: the cavity (9) is also equipped with a photocatalyst honeycomb filter (1). 3. The air sterilization and purification device according to claim 2, characterized in that: the cavity (9) is also equipped with a UV-A ultraviolet lamp (4) whose light can directly irradiate the photocatalyst honeycomb filter (1). 4. The air sterilization and purification device according to claim 2 or 3, characterized in that: the photocatalyst honeycomb filter (1) is an aluminum-based nanophotocatalyst activated carbon honeycomb filter (1). 5. The air sterilization and purification device according to claim 1, characterized in that: an oxygen ion sterilization integrated generator (2) is also installed in the cavity (9).

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