WO2011109946A1

WO2011109946A1 - Air sterilization device

Info

Publication number: WO2011109946A1
Application number: PCT/CN2010/071450
Authority: WO
Inventors: 胡军辉; 钟斌
Original assignee: 刘彬
Priority date: 2010-03-10
Filing date: 2010-03-31
Publication date: 2011-09-15
Also published as: CN201625223U

Abstract

An air sterilization device includes a body with an air inlet port and an air outlet port at the two sides, a fan in the body, a liquid bacteria catcher, and a bacteria deactivation device. Air is driven by the fan from the air inlet, via the liquid bacteria catcher, and arrives at the air outlet port. The bacteria deactivation device includes an ultraviolet light source, and the ultraviolet light source irradiates the liquid in the liquid bacteria catcher. The air sterilization device does not use photo catalyst, and it can achieve a good sterilization effect and low cost.

Description

Air disinfection device

[Technical Field]

The present invention relates to an air sterilizing apparatus, and more particularly to a device for capturing harmful bacteria and viruses in the air through a liquid phase and killing them by ultraviolet light.

【Background technique】

In order to improve their living standards, people constantly use air conditioners and other air-conversion equipment to create a good temperature and humidity environment. However, suitable temperature and humidity also create good conditions for fungi, bacteria and virus reproduction, making indoor fungi, Bacteria and viruses multiply. In closed family rooms, bacteria and viruses are not easily discharged outside because of the slower air flow. A large number of fungi, bacteria and viruses breed not only threaten human health, but also generate harmful gases. , causing pollution to the room air. At the same time, in the closed family room, not only fungi, bacteria and viruses are caused by air pollution in the rooms, but also carbon dioxide exhaled by dense crowds, chemical gas emissions from decoration materials, smoke and office pollutants.

In places where there is a large flow of open people, such as school classrooms, hospital wards, offices, and places where people come and go, such as banks and shops. Complex personnel flow brings more bacteria and viruses, and the proper temperature and humidity environment provides a good breeding environment for bacteria and viruses, so the number of bacteria and viruses is higher than other places, so These places require more killing of fungi, bacteria and viruses in the air than closed family rooms.

There are many ways to kill bacteria in the air. The most common one is the ultraviolet light disinfection. The ultraviolet disinfection is to destroy and change the microbial DNA (deoxyribonucleic acid) by ultraviolet radiation. Structure, so that the bacteria immediately die or can not breed offspring, to achieve the purpose of sterilization. The true bactericidal effect is UVC ultraviolet light, because the C-band ultraviolet light is easily absorbed by the DNA of the organism, especially the ultraviolet light of about 253.7 nm.

Photocatalyst is more effective than ultraviolet light sterilization. The photocatalytic sterilization principle is that the photocatalyst generates a photocatalytic reaction similar to light and action under the illumination of light, and produces a free hydroxyl group and active oxygen with strong oxidizing power. It has a strong photooxidation and reduction function, can oxidize and decompose various organic compounds and some inorganic substances, can destroy the bacterial cell membrane and solidify the virus protein, and can play a very good role in killing bacteria.

At present, the common air disinfection device directly sterilizes air by passing through an ultraviolet tube or a photocatalytic reaction chamber. Killing bacteria through photocatalyst is inseparable from the photoexcitation of ultraviolet light, but adding a photocatalytic material (such as titanium dioxide) outside the UV lamp can significantly increase the effect of killing bacteria, under the same light intensity and illumination time, In the air, ultraviolet light is used for sterilization. The disposable sterilization rate is only about 30%. After using photocatalytic materials (such as titanium dioxide), the disposable sterilization rate can reach 90%, and the sterilization rate is significantly increased by 2 times.

Therefore, by adding photocatalytic materials outside the ultraviolet light to kill bacteria, more and more people have gained recognition and attention, and the scope of application is also wider and wider. However, the prior art has the following problems:

1. Most ultraviolet disinfection devices or ultraviolet excitation photocatalytic disinfection devices are air passing through a dry disinfection device. In this way, the collection efficiency of the bacteria is very low, so to achieve the disinfection effect, a high-power ultraviolet lamp is required, usually It requires hundreds of watts of power, so it consumes a lot of energy and the cost of the device is high;

2. The photocatalytic material in the ultraviolet excitation photocatalytic disinfection device is expensive, the cost of photocatalytic sterilization is high, and the photocatalytic material components are periodically replaced due to the life problem, and the maintenance is troublesome in long-term use; 3. The catalytic activity of photocatalytic materials is greatly affected by the temperature and humidity of the air environment and the chemical substances, and it is also possible to cause secondary pollution to the air.

[Summary of the Invention]

In order to solve the deficiencies in the prior art, the present invention proposes an air sterilizing device with lower cost and higher bactericidal efficiency, and the device has stable working performance and does not cause secondary pollution to the environment.

The conventional air disinfection device considers that adding a photocatalytic material outside the ultraviolet light can significantly increase the sterilization rate, and the present invention changes the conventional idea and attempts to remove the photocatalytic material. After comparison experiments, the inventors found that the photocatalytic material was removed, but With the aid of the liquid-collecting bacteria device to greatly improve the collection efficiency, the disposable sterilization rate is over 98%. Compared with the photocatalytic material and the aid of the liquid-phase bacteria collection device, the one-time sterilization effect is almost the same. However, it is extremely cost-effective, and it is much more efficient than the traditional one-time sterilization process that allows air to pass directly through the UV tube.

The specific technical solutions of the present invention for realizing the above technical effects are as follows:

An air sterilizing device includes a body having an air inlet and an air outlet on both sides, a fan disposed in the body, a liquid phase trapping bacteria device and a bacteria inactivating device, and the air is driven by the fan from the air inlet The liquid phase trapping bacteria device reaches the air outlet, wherein the pathogen inactivating device comprises an ultraviolet light source, and the ultraviolet light source irradiates the liquid in the liquid phase bacteria collecting device.

The germ inactivation device includes a mirror for reflecting light emitted by the ultraviolet light source into the liquid.

The ultraviolet light source is disposed in a liquid.

The liquid phase trapping bacteria device comprises a liquid storage tank at the bottom of the body, located at the top of the body An overflow tank, a water pump for pumping liquid from the liquid storage tank into the overflow tank, and a member having a porous passage connecting the liquid storage tank and the overflow tank, the liquid flowing from the overflow tank through the porous passage member a liquid storage tank, the air traversing the porous passage member from the air inlet to the air outlet.

The ultraviolet light source is disposed in a liquid. The ultraviolet light source is disposed in a flow path of the liquid from the reservoir to the overflow tank.

The shape of the tunnel member having the porous passage member is a mesh shape.

The pathogens of the present invention include pathogenic microorganisms such as fungi, bacteria and viruses.

In summary, the technical effects achieved by the present invention are as follows:

1. The invention can achieve the same disposable sterilization rate of the air disinfection device of the ultraviolet light plus photocatalytic material, but does not need to set the photocatalytic material, can greatly save the cost, and does not appear due to the photocatalytic material. The problem of secondary pollution.

2. The invention has the advantages of simple structure, low cost, convenient maintenance and no need to replace the photocatalytic material frequently.

[Description of the Drawings]

1 is a schematic view showing the front structure of Embodiment 1 of the present invention;

2 is a schematic view showing the front structure of Embodiment 2 of the present invention;

3 is a schematic front view of a third embodiment of the present invention;

4 is a schematic view showing the front structure of Embodiment 4 of the present invention.

【detailed description】

The present invention relates to an air sterilizing device which, although removing a photocatalytic material, has a higher disposable sterilizing rate similar to that of a photocatalytic material, eliminating the need for light urging. After materialization, the cost is greatly saved.

The present invention will be further illustrated and described below in conjunction with specific embodiments:

Example 1

As shown in FIG. 1 , an air sterilizing device includes a body 11 , and an air inlet 111 and an air outlet 112 are disposed on two sides of the body 11 , and the inside of the body 11 further includes a liquid phase trapping device 12 and a fan 13 . The pathogen inactivating device 14 is disposed near the air inlet, the fan 13 is disposed near the air outlet 112, and the bacteria inactivating device 14 is disposed at a middle portion of the body 11.

The liquid phase trapping bacteria device 12 includes a liquid storage tank 121 located at the bottom of the body 11 and containing water, an overflow tank 122 located at the top of the body 11 and containing water, a water pump 123 located in the liquid storage tank, and a connection The water pump 125 and the water pipe 125 of the overflow tank 122, the porous mesh 126 located near the air inlet 111, and the porous mesh 126 are in the shape of a flat plate for traversing the air entering from the air inlet through the porous mesh 126. The upper end is connected to the outlet of the overflow tank 122, and the lower end extends to the water of the reservoir tank 121.

The pathogen inactivating device 14 includes an ultraviolet light source 141 and a mirror 142 that reflects the ultraviolet light emitted from the ultraviolet light source 141 into the water of the reservoir 121.

In operation, the water pump 123 draws water from the reservoir 121 into the overflow tank 122, and the water flows out from the outlet of the overflow tank 122, passes through the porous web 126, and reaches the reservoir 121 to complete the entire water cycle. When the water flows through the porous mesh 126, a water curtain is formed. Under the pulsation of the fan 13, the outside air enters from the air inlet 111, traverses the porous mesh 126, and is in full contact with the water on the porous mesh 126, and the bacteria in the air (including fungi, bacteria and viruses) are trapped in water and into the water. The bacteria-laden water flows into the reservoir. Under the ultraviolet light emitted by the ultraviolet light source, the bacteria in the water are killed, and the disinfected water continues to be completed. The entire water cycle process. And the bacteria in the air are taken away by the water, leaving Under the clean air, the clean air is driven by the fan and flows out through the air outlet 112. Throughout the process, the bacteria in the air are captured by water, and then killed by ultraviolet light to complete the whole process of air purification and water disinfection.

Example 2

As shown in FIG. 2, on the basis of the first embodiment, and different from the first embodiment, the pathogen inactivating device is disposed in the water of the liquid storage tank, and the ultraviolet light source is disposed on the waterproof and light-tight sealing. In the container, the closed container is disposed in the water. The advantage of this is that the ultraviolet light can enter the water more fully and effectively kill the bacteria.

Example 3

As shown in FIG. 3, on the basis of Embodiment 1, but different from Embodiment 1, the ultraviolet light source is irradiated against the porous mesh, and the ultraviolet light is sufficiently reflected to the porous network through the mirror. Because the bacteria in the air are mainly trapped by water curtain formed on the porous net, the concentration of bacteria in the water is the highest here, and the bacteria in the water in this part are killed, only the lower power is needed to achieve the same sterilization effect. .

Example 4

As shown in FIG. 4, on the basis of the embodiment, and different from the embodiment 1, the pathogen inactivating device 14 includes an ultraviolet light source 141 and a cylindrical sealed container 143, and the ultraviolet light source 141 is disposed at In the cylindrical sealed container 143, the sealed container 143 is provided with two water outlets, respectively connected to the two water pipes 125, and the other ends of the two water pipes 125 are connected to the water pump 123 and the overflow tank 122, respectively.

When the water pumped out by the water pump passes through the ultraviolet light source 141, it is killed by the ultraviolet light and enters the overflow tank 122. Since all the water needs to pass through the sealed container 143 during the circulation, the sterilization effect of this embodiment is the best, and the same sterilization is performed. The effect, the power of the UV source is also minimal, and is an optimal embodiment.

In order to better illustrate the actual bactericidal effect of the present invention, the inventors gave the following comparative experiments. Instruction manual

The results are as follows:

Detecting environmental conditions: Temperature: 2TC~24°C _; Relative humidity: 37%~55% _;

Test basis: Refer to "Disinfection Technical Specifications" 2002 version 2.1 .1.7.4;

Test materials: Staphylococcus aureus (ATCC 6538), provided by the Academy of Military Medical Sciences; Test items: Suspension quantitative sterilization test;

Detection method:

Two air disinfection devices are required, the air inactivation device of the air disinfection device includes an ultraviolet light source and a photocatalyst, and the other bacteria disinfection device of the air disinfection device includes only the ultraviolet light source, excluding the photocatalyst, and other components of the two air disinfection devices. And the connection relationship of each component is exactly the same, the path of the germ inactivation device in the air disinfection device is also the same, adding 3L of sterilized distilled water to the two air disinfection devices, and adding the prepared bacterial suspension, so that The final concentration of the bacterial solution was fully stirred at 2×10 ⁶ cfu/ml _o . At the same time, the air disinfection device was started for 120 minutes, and then 1.0 ml of water in two air disinfection devices was taken for viable count, and the killing rate was calculated.

Test results: The bacteria killing rate of the air disinfection device including the ultraviolet light source and the photocatalyst was 99.8%, and the bacteria killing rate of the air disinfecting device without the photocatalyst was 99.3%. It should be noted that many modifications and variations can be made by those skilled in the art based on the above-described embodiments and the principles of the present invention, but no matter what modifications and improvements, as long as the technical solutions are in the concept of the present invention. Within the scope, it should be equivalent to the technical solution of this patent, and it belongs to the protection scope of this patent.

Claims

Claim

1 . An air sterilizing device comprising a body having an air inlet and an air outlet on both sides, a fan disposed in the body, a liquid phase trapping device and a bacteria inactivating device, wherein the air is driven by the fan The tuyere reaches the air outlet through the liquid phase trapping bacteria device, wherein the disease inactivating device comprises an ultraviolet light source, and the ultraviolet light source irradiates the liquid in the liquid phase bacteria collecting device.

2. An air sterilizing apparatus according to claim 1, wherein said pathogen inactivating means comprises a mirror for reflecting light emitted from said ultraviolet light source into said liquid.

3. An air sterilizing apparatus according to claim 1 or 2, wherein the ultraviolet light source is disposed in the liquid.

4. The air sterilizing device according to claim 1, wherein the liquid phase trapping bacteria device comprises a liquid storage tank at the bottom of the body, an overflow tank at the top of the body, and the liquid is used for a reservoir pump pumping up into the overflow tank and a component having a porous passage connecting the reservoir tank and the overflow tank, the liquid flowing from the overflow tank to the reservoir through the porous passage member, the air traversing The porous channel member reaches the air outlet from the air inlet.

5. An air sterilizing apparatus according to claim 4, wherein said ultraviolet light source is disposed in the liquid.

6. An air sterilizing apparatus according to claim 5, wherein said ultraviolet light source is disposed in a flow path of the liquid from the liquid storage tank to the overflow tank.

The air sterilizing apparatus according to claim 4, 5 or 6, wherein the shape of the tunnel member having the porous passage member is a mesh shape.