CN201625223U - An air disinfection device - Google Patents

Abstract

The utility model relates to an air disinfection device, which comprises a machine body with air inlets and air outlets on both sides, a fan located in the body, a liquid-phase germ trapping device and a germ inactivation device, the air is driven by the fan from the The air inlet reaches the air outlet through the liquid-phase germ trapping device, and it is characterized in that the germ inactivation device includes an ultraviolet light source, and the ultraviolet light source irradiates the liquid in the liquid-phase germ trapping device. The utility model changes the traditional thinking and tries to remove the photocatalytic material. After comparative experiments, it is found that the photocatalytic material is removed, but with the assistance of the liquid-phase germ trapping device, the one-time sterilization rate reaches more than 98%, which is different from that provided with With the help of photocatalytic materials and the greatly improved capture efficiency of the liquid-phase bacteria capture device, the one-time sterilization effect is almost the same, but the cost is greatly saved.

Description

An air disinfection device

technical field

The utility model relates to an air disinfection device, in particular to a device which captures harmful bacteria and viruses in the air through a liquid phase and kills them through ultraviolet light.

Background technique

In order to improve their living standards, people continue to 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 the reproduction of fungi, bacteria and viruses, making indoor fungi, Bacteria and viruses reproduce in large numbers. In a closed family room, due to the slow air flow, bacteria and viruses are not easily discharged to the outside. A large number of fungi, bacteria and viruses not only threaten human health, but also produce harmful gases , pollute the air in the room. At the same time, in a closed family room, not only fungi, bacteria and viruses, but also carbon dioxide exhaled by dense crowds, chemical gas emissions from decoration materials, smog and office pollutants cause room air pollution.

In open places with a large flow of people, such as school classrooms, hospital wards, offices, and business places such as banks and shops where people come and go. The complex flow of people brings more bacteria and viruses, and the suitable 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. Therefore, in These places require more airborne fungi, bacteria and viruses than closed family rooms.

There are many ways to kill bacteria in the air. The more common one is ultraviolet light disinfection. Ultraviolet sterilization is to destroy and change the DNA (deoxyribonucleic acid) structure of microorganisms through ultraviolet radiation, so that the bacteria die immediately or cannot reproduce. Offspring, to achieve the purpose of sterilization. It is UVC ultraviolet rays that really have a bactericidal effect, because C-band ultraviolet rays are easily absorbed by the DNA of organisms, especially ultraviolet rays around 253.7nm are the best.

The photocatalyst has a better sterilization effect than ultraviolet light. The principle of photocatalyst sterilization is that under the irradiation of light, the photocatalyst will produce a photocatalytic reaction similar to the action of light and produce free hydroxyl groups and active oxygen with strong oxidizing ability. It has a strong photoredox function, can oxidize and decompose various organic compounds and some inorganic substances, can destroy the cell membrane of bacteria and solidify the protein of viruses, and can play a very good role in killing bacteria.

At present, common air disinfection devices pass air directly through ultraviolet light tubes or photocatalytic reaction chambers to achieve sterilization. Killing bacteria through photocatalysts is inseparable from the photoexcitation of ultraviolet light, but adding photocatalytic materials (such as titanium dioxide) outside the ultraviolet lamp can significantly increase the effect of killing bacteria. Under the same light intensity and light time, in In the air, if ultraviolet light is used alone for sterilization, the one-time sterilization rate is only about 30%, but after using photocatalytic materials (such as titanium dioxide), the one-time sterilization rate can reach 90%, and the sterilization rate is significantly increased by 2 times.

Therefore, killing bacteria by adding photocatalytic materials outside the ultraviolet light has been more and more recognized and valued by everyone, and the scope of application is becoming wider and wider. However, the existing technology has the following problems:

1. Most of the ultraviolet disinfection devices or ultraviolet photocatalytic disinfection devices use the method of air passing through the dry disinfection device. The capture efficiency of germs in this way is very low. Therefore, to achieve the disinfection effect, a high-power ultraviolet lamp must be used. Usually Hundreds of watts of power are required, so energy consumption is high and installation costs are high;

2. The photocatalytic material in the ultraviolet excitation photocatalytic disinfection device is expensive, and the cost of photocatalyst sterilization and disinfection is relatively high. At the same time, due to the life problem, the photocatalytic material parts must be replaced regularly, and maintenance is troublesome during long-term use;

3. The catalytic activity of photocatalytic materials is greatly affected by the temperature and humidity of the air environment and chemical substances, and it may also cause secondary pollution to the air.

Contents of the invention

In order to solve the deficiencies in the existing technology, the utility model proposes an air disinfection device with lower cost and higher sterilization efficiency. At the same time, the device has stable working performance and will not cause secondary pollution to the environment.

Traditional air disinfection devices believe that adding photocatalytic materials outside the ultraviolet light can significantly increase the sterilization rate, but this utility model changes the traditional thinking and tries to remove photocatalytic materials. After comparative experiments, the utility model found that photocatalytic materials were removed. , but with the aid of the liquid-phase bacteria capture device greatly improving the capture efficiency, the one-time sterilization rate reached over 98%. The difference is almost the same, but it greatly saves the cost, and it is much higher than the traditional one-time sterilization efficiency of letting air directly pass through the ultraviolet light tube.

The utility model is to realize the concrete technical scheme of above-mentioned technical effect as follows:

An air disinfection device, comprising a body with air inlets and outlets on both sides, a fan located in the body, a liquid-phase trapping germ device and a germ inactivation device, the air is driven by the fan through the air inlet through the The liquid-phase germ trapping device reaches the air outlet, and it is characterized in that the germ inactivation device includes an ultraviolet light source, and the ultraviolet light source irradiates the liquid in the liquid-phase germ trapping device.

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

The ultraviolet light source is arranged in the liquid.

The liquid-phase trapping germ device includes a liquid storage tank at the bottom of the body, an overflow tank at the top of the body, a water pump for pumping liquid from the liquid storage tank to the overflow tank, and a connection between the liquid storage tank and the overflow tank. The part of the flow tank has multiple channels, the liquid flows from the overflow tank to the liquid storage tank through the multi-channel part, and the air crosses the multi-channel part from the air inlet to the air outlet.

The ultraviolet light source is arranged in the liquid. The ultraviolet light source is arranged in the flow path of the liquid from the liquid storage tank to the overflow tank.

The shape of the channel part having multiple channel parts is net-like.

Germs described in the utility model include pathogenic microorganisms such as fungi, bacteria and viruses.

In summary, the technical effects achieved by the utility model are as follows:

1. The utility model can achieve the similar one-time sterilization rate of the air disinfection device with ultraviolet light and photocatalytic material, but it does not need to install photocatalytic material, which can greatly save costs, and there will be no secondary disinfection caused by photocatalytic material. pollution problem.

2. The utility model has the advantages of simple structure, low cost, convenient maintenance, and no frequent replacement of photocatalytic materials.

Description of drawings

Fig. 1 is the front structure schematic diagram of the utility model embodiment 1;

Fig. 2 is the front structure schematic diagram of the utility model embodiment 2;

Fig. 3 is a schematic view of the front structure of Embodiment 3 of the present utility model;

Fig. 4 is a schematic view of the front structure of Embodiment 4 of the present utility model.

Detailed ways

The utility model relates to an air disinfection device. Although the photocatalytic material is removed from the air disinfection device, it has a one-time high sterilization rate similar to that of the photocatalytic material, and the photocatalytic material is omitted. Big cost savings.

Below in conjunction with specific embodiment, the utility model is further elaborated and illustrated:

Example 1

As shown in Figure 1, an air disinfection device includes a body 11, an air inlet 111 and an air outlet 112 are arranged on both sides of the body 11, and the inside of the body 11 also includes a liquid-phase catching germ device 12 and a fan 13. . Germ inactivation device 14 , the liquid phase trapping germ device 12 is arranged near the air inlet, the fan 13 is arranged near the air outlet 112 , and the germ inactivation device 14 is arranged in the middle of the body 11 .

The liquid-phase trapping germ device 12 includes a liquid storage tank 121 located at the bottom of the body 11 and filled with water, an overflow tank 122 located at the top of the body 11 and filled with water, a water pump 123 located in the liquid storage tank, a connection The water pipe 125 of the water pump 123 and the overflow tank 122, the porous net 126 positioned near the air inlet 111, the porous net 126 is a flat plate, used to make the air entering from the air inlet cross the porous net, the porous net 126 The upper end is connected to the outlet of the overflow tank 122 , and the lower end extends into the water in the liquid storage tank 121 .

The germ inactivation device 14 includes an ultraviolet light source 141 and a reflector 142 , and the reflector 142 reflects the ultraviolet light emitted by the ultraviolet light source 141 to the water in the liquid storage tank 121 .

When working, the water pump 123 pumps water from the liquid storage tank 121 to the overflow tank 122, and the water flows out from the outlet of the overflow tank 122 by heating, and then reaches the liquid storage tank 121 through the porous net 126, completing the entire water circulation process , and when the water flows through the porous net 126, a water curtain will be formed. Under the twitch of the fan 13, the external air enters from the air inlet 111, crosses the porous net 126, and after fully contacting the water on the porous net 126, the germs in the air (including fungi, bacteria and viruses) are captured by water and enter the water, and the water with germs flows into the liquid storage tank. Under the irradiation of ultraviolet light emitted by the ultraviolet light source, the germs in the water are killed, and the disinfected water continues to complete throughout the water cycle. And after the germs in the air are absorbed and taken away by water, clean air is left, and the clean air flows out through the air outlet 112 under the drive of the blower fan.

The whole process captures the germs in the air through water, and then kills them through ultraviolet light, completing the whole process of air purification and water disinfection.

Example 2

As shown in Figure 2, on the basis of Example 1, and different from Example 1, the germ inactivation device is arranged in the water of the liquid storage tank, and the ultraviolet light source is arranged in a waterproof and light-transmitting airtight container. In the container, the airtight container is arranged in water to have the advantage of making the ultraviolet light enter the water more fully and more effectively kill germs.

Example 3

As shown in Figure 3, on the basis of Example 1, but different from Example 1, the ultraviolet light source is irradiated against the porous net, and the ultraviolet light is fully reflected on the porous net by a reflector , since the germs in the air are mainly captured by the water curtain formed on the porous net, the concentration of germs in the water here is the highest. To kill the bacteria in the water in this part, only a lower power is needed to achieve the same bactericidal effect .

Example 4

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

After the water pumped out passes through the ultraviolet light source 141, it enters the overflow tank 122 after being killed by ultraviolet rays. Since all the water needs to pass through the sealed container 143 during the circulation process, the sterilization effect of this embodiment is the best, and the same sterilization Effect, the power of the ultraviolet light source is also the smallest, which is the optimal embodiment.

In order to better illustrate the actual bactericidal effect of the utility model, the utility model provides the following comparative experiments, and the results are as follows:

Testing environment conditions: temperature: 21°C~24°C; relative humidity: 37%~55%;

Test basis: refer to "Disinfection Technical Specifications" 2002 version 2.1.1.7.4;

Test materials: Staphylococcus aureus (ATCC6538), provided by the Academy of Military Medical Sciences;

Test items: Suspension quantitative bactericidal test;

Detection method:

Prepare two air disinfection devices, the germ inactivation device of one air disinfection device includes ultraviolet light source and photocatalyst, the germ inactivation device of the other air disinfection device only includes ultraviolet light source, does not include photocatalyst, other parts of the two air disinfection devices And the connection relationship of each part is exactly the same, and the position of described germ deactivation device in air disinfection device is also the same, adds 3L of sterilized distilled water in two air disinfection devices, then adds the prepared bacteria suspension, makes The final bacterial concentration was 2x10 ⁶ cfu/ml. Stir well, and at the same time start the air disinfection device for 120 minutes, take 1.0ml of water from the two air disinfection devices to count the viable bacteria, and calculate the killing rate.

Test results: The bacteria killing rate of the air disinfection device including ultraviolet light source and photocatalyst is 99.8%, and the bacteria killing rate of the air disinfection device without photocatalyst is 99.3%.

It should be noted that those skilled in the art can make many improvements and modifications based on the above-mentioned embodiments and the principle of the utility model, but no matter what kind of variations and improvements, as long as these technical solutions are included in the utility model Within the scope of the concept, it should be equivalent to the technical solution of this patent, and belongs to the protection scope of this patent.

Claims (7)

1. air disinfection device, comprise that both sides have the body of air inlet and air outlet and are positioned at the intravital blower fan of machine, liquid phase capture pathogenic bacteria device and pathogenic bacteria inactivating device, described air captures the pathogenic bacteria device from described air inlet through liquid phase and arrives air outlet under the drive of blower fan, it is characterized in that, described pathogenic bacteria inactivating device comprises ultraviolet source, and described ultraviolet source shines the liquid in the described liquid phase pathogenic bacteria capturing device.

2. a kind of air disinfection device according to claim 1 is characterized in that, described pathogenic bacteria inactivating device comprises illuminator, and the luminous reflectance that is used for described ultraviolet source is launched is to liquid.

3. a kind of air disinfection device according to claim 1 and 2 is characterized in that described ultraviolet source is arranged in the liquid.

4. a kind of air disinfection device according to claim 1, it is characterized in that, described liquid phase capture the pathogenic bacteria device comprise the reserving liquid tank that is arranged in organism bottom, be positioned at the body top overflow launder, be used for liquid is taken out water pump that is raised to overflow launder and the parts with porous road that connect reserving liquid tank and overflow launder from reserving liquid tank, described liquid flows to reserving liquid tank from overflow launder through porous road parts, and described air crosses porous road parts and arrives air outlet from air inlet.

5. a kind of air disinfection device according to claim 4 is characterized in that described ultraviolet source is arranged in the liquid.

6. a kind of air disinfection device according to claim 5 is characterized in that, described ultraviolet source is arranged in the runner of liquid from the reserving liquid tank to the overflow launder.

7. according to claim 4,5 or 6 described a kind of air disinfection devices, it is characterized in that being shaped as of described duct parts with porous road parts is netted.

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