An air purification device capable of killing microorganisms

Abstract

The present invention relates to the field of microwave electrodeless ultraviolet lamps, and refers to an air purification device capable of killing microorganisms, which solves the problems of high cost of lamp tubes and non-uniform radiation in the prior art. The present invention includes a microwave generator, an electrodeless ultraviolet lamp tube, and further includes a uniform radiator; the coaxial cable is radially provided with a slit; the electrodeless ultraviolet lamp tube is a hollow cylindrical quartz tube; the coaxial cable is arranged in the hollow part of the quartz tube, and the coaxial cable is connected to the microwave generator. The microwave electrodeless ultraviolet lamp of the present invention has the characteristics of small volume and high power, making the structure of the air purification device compact; by arranging the high-power electrodeless ultraviolet device in the air duct of the air purification device, while filtering large-particle dust in the air, effectively killing microorganisms and germs in the air; safe and effective; the present invention has a simple structure and a uniform and comprehensive radiation electrodeless ultraviolet lamp, with high sterilization efficiency and low production cost.

Description

Technical Field

[0001] The present invention relates to the field of air purification, and particularly to an air purification device capable of killing microorganisms. Background Art

[0002] With the increasing air pollution and people's pursuit of quality of life, air purification devices have become standard equipment in families, offices and even public places. In the prior art, air purification generally solves the problems of dust adsorption rate and working hours; however, there are not only dusts in the air, but also microorganisms. Especially in hospitals or during the epidemic, viral aerosols in the air have become a source of fear for people. And for ultraviolet sterilization in the prior art, the room needs to be sealed and treated for a relatively long time, which cannot meet the application requirements of all places, and the laying cost is huge, and it is more likely to cause harm to the human body; while for ozone sterilization technology, it is even more difficult to operate, and it will cause harm to the human body if there is a slight mistake.

[0003] In the prior art, microwave technology can be used to excite ultraviolet light. There are two common types of microwave generators: magnetrons and solid state sources. For existing microwave electrodeless ultraviolet lamps, due to the relatively large common waveguide sizes, they are not easy to carry; and the power of the current ultraviolet lamps is small; in the case of a large air volume, using ultraviolet lamps often fails to meet the sterilization standard.

[0004] There is an urgent need for a new type of air purification device that can solve the above problems. Summary of the Invention

[0005] An air purification device capable of killing microorganisms proposed by the present invention solves the problem that the air purification device in the prior art cannot kill microorganisms.

[0006] The technical solution of the present invention is realized as follows: An air purification device capable of killing microorganisms includes an air duct, an air pump and a filtering device; it further includes an electrodeless ultraviolet sterilization device, and the electrodeless ultraviolet sterilization device is arranged in the air duct; the electrodeless ultraviolet sterilization device includes a microwave generator, an electrodeless ultraviolet lamp tube and a uniform radiator; the uniform radiator is a coaxial cable, and there are slits on it; the electrodeless ultraviolet lamp tube is hollow and is a columnar quartz tube with a sandwich layer for hermetically setting mercury and argon; the coaxial cable is arranged in the hollow part of the quartz tube, and the coaxial cable is connected to the microwave generator through a microwave transmission line.

[0007] Preferably, the electrodeless ultraviolet sterilization device is arranged behind the filtering device.

[0008] Further, the slits are arranged on the outer conductor of the coaxial cable, and the external electric field distribution of the coaxial cable is uniform.

[0009] Among them, the slits can be arranged radially, transversely or obliquely.

[0010] Preferably, the length of the coaxial cable is the same as that of the quartz tube.

[0011] Preferably, a short circuit plane is further provided at one end of the electrodeless ultraviolet lamp away from the microwave generator.

[0012] Preferably, the coaxial cable and both ends of the electrodeless ultraviolet lamp have a sealing structure.

[0013] Preferably, the length of the coaxial cable and the electrodeless ultraviolet lamp is 200 mm, and the number of slits of the coaxial cable is 8.

[0014] Preferably, the coaxial cable is connected to the microwave generator through a microwave coaxial conversion device; the microwave coaxial conversion device includes an output antenna for connecting the magnetron, a coaxial connector for connecting the coaxial cavity, and a conversion cavity for energy feeding;

[0015] Further, the inner conductor of the coaxial connector is higher than the outer conductor; the inner conductor is of a rivet structure, the radius of the part of the inner conductor close to the output antenna exceeds that of the part away from the output antenna; the part close to the output antenna is the nail head part; the nail head part is of a chamfered structure.

[0016] An air purification device capable of killing microorganisms disclosed by the present invention, in which the microwave electrodeless ultraviolet lamp has the characteristics of small volume and high power, making the air purification device structure compact; by arranging the high-power electrodeless ultraviolet device in the air duct of the air purification device, while filtering large-particle dust in the air, effectively killing microorganisms and germs in the air; safe and effective; the present invention has high sterilization efficiency and low production cost by arranging an electrodeless ultraviolet lamp with a simple structure and uniform and comprehensive radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0018] Figure 1 : Structural schematic diagram of the present invention;

[0019] Figure 2 : Cross-sectional schematic diagram of the electrodeless ultraviolet lamp;

[0020] Figure 3 : Cross-sectional view of the electrodeless ultraviolet lamp;

[0021] Figure 4 : Electric field distribution diagram of the uniform radiator;

[0022] Figure 5 : Schematic structural diagram of a microwave coaxial conversion device;

[0023] Among them: 1. Electrodeless ultraviolet lamp tube; 2. Interlayer; 3. Hollow part; 4. Microwave transmission line; 5. Coaxial cable; 6. Slit; 7. Magnetron; 8. Conversion cavity; 9. Inner conductor; 10. Outer conductor; 11. Nail cap part; 12. Air pump; 13. Filter screen; 14. Sterilization chamber. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0025] An air purification device capable of killing microorganisms disclosed by the present invention, an air purification device capable of killing microorganisms, includes an air duct, an air pump 12 and a filtering device; it further includes an electrodeless ultraviolet sterilization device, and the electrodeless ultraviolet sterilization device is arranged in the air duct; the electrodeless ultraviolet sterilization device includes a microwave generator, an electrodeless ultraviolet lamp tube 1, and a uniform radiator; the uniform radiator is a coaxial cable 5, on which there is a slit; the electrodeless ultraviolet lamp tube 1 is hollow and is a columnar quartz tube with an interlayer 2 for hermetically setting mercury and argon; the coaxial cable 5 is arranged in the hollow part 3 of the quartz tube, and the coaxial cable 5 is connected to the microwave generator through a microwave transmission line 4.

[0026] Preferably, the electrodeless ultraviolet sterilization device is arranged behind the filtering device.

[0027] Further, the slit is arranged on the outer conductor 10 of the coaxial cable 5, and the external electric field distribution of the coaxial cable 5 is uniform.

[0028] Among them, the slit can be arranged radially or horizontally or obliquely.

[0029] Preferably, the length of the coaxial cable 5 is the same as the length of the quartz tube.

[0030] Preferably, a short circuit surface is further arranged at one end of the electrodeless ultraviolet lamp tube 1 away from the microwave generator.

[0031] Preferably, the coaxial cable 5 and both ends of the electrodeless ultraviolet lamp tube 1 have a sealing structure.

[0032] Preferably, the lengths of the coaxial cable 5 and the electrodeless ultraviolet lamp tube 1 are 200 mm, and the number of slits 6 in the coaxial cable 5 is 8. Inside the coaxial radiator, the current will conduct along the axial direction of the coaxial line. Along the radial slit 6, the current is cut. The more the current is cut, the greater the energy coupled from the slit, and the electromagnetic wave radiates out from the coaxial slit. Using the FDTD algorithm, according to the magnitude of S11, the slit form, size, and number of the coaxial cable 5 are optimized, and finally, uniform radiation of microwave energy is achieved in the transmission direction of the entire coaxial cable 5. Since the microwave is introduced from the feed port, the slits closer to the feed port couple the microwave energy first. To ensure that the energy coupled axially in the entire 200 m long coaxial radiator is also uniform, the number of slits opened in the place farther from the feed port is more.

[0033] Preferably, the coaxial cable is connected to a microwave generator through a microwave coaxial conversion device; the microwave coaxial conversion device includes a coaxial connector for connecting the magnetron 7, a coaxial connector for connecting the coaxial cavity, and a conversion cavity 8 for energy feeding; further, the inner conductor 9 of the coaxial connector is higher than the outer conductor 10; the inner conductor 9 is in a rivet structure, and the radius of the inner conductor 9 near the microwave output antenna part exceeds that of the part far from the microwave output antenna; the part near the output antenna is the nail head part 11; the nail head part 11 is in a chamfer structure.

[0034] The microwave coaxial conversion device outputs microwave energy in the conversion cavity 8 by setting a coaxial connector that can connect the magnetron 7 and the coaxial cavity. It not only has a simple and compact structure, is convenient for the integration of the magnetron 7 system, but also has high microwave output efficiency and is not easily affected by the load; by setting the nail head part 11, the tip effect is effectively prevented.

[0035] The electrodeless ultraviolet sterilization device transmits the microwave generated by the magnetron 7 to the uniform radiator through the microwave transmission line 4; the uniform radiator uniformly radiates through the slit to the hollow part 3 of the quartz tube; the microwave radiated through the slit uniformly excites mercury and argon in the interlayer 2 to generate ultraviolet rays.

[0036] During use, the power is turned on, and the air pump 12 pumps the air in the space into the air duct system, passing through the filtering device and the electrodeless ultraviolet sterilization device; the electrodeless ultraviolet sterilization device radiates electromagnetic waves through the non-uniform slits opened by the L29 head connecting the coaxial cable 5 by the microwave generator, that is, the solid-state source. The slits on the coaxial cable 5 are arranged in such a way that the farther away from the microwave feed port, the denser the slits 6 are; specifically, it is set according to the magnitude of S11 and whether the electric field distribution outside the quartz tube is uniform by using the FDTD algorithm; when the slits 6 radiate uniformly outside the electrodeless ultraviolet lamp, the purpose of uniformly lighting the electrodeless ultraviolet lamp is achieved.

[0037] As Figure 3As shown in the electric field distribution of the uniform radiator, when the input power is 500W, by simulating S11 of the feeding port, the microwave reflection coefficient of the port is less than -10dB; it can be seen that the electric field strength at the ultraviolet lamp tube can reach more than 3000V / m, and the electric field strength is uniform in all directions of 360 degrees, and the electric field sizes at all positions of the entire ultraviolet lamp tube are uniform. The coaxial cable 5 connected to the microwave generator is arranged in the hollow part 3 of the hollow electrodeless ultraviolet lamp tube 1, and the non-uniform slits 6 radiate electromagnetic waves, and a uniformly distributed electric field is formed in the quartz tube, and then the electrodeless ultraviolet tube is uniformly radiated in all directions.

[0038] In this way, the air passing through the filtering device and the electrodeless ultraviolet sterilization device not only removes large particulate dust in the air, but also kills microorganisms and germs in the air by ultraviolet rays.

[0039] An air purification device capable of killing microorganisms disclosed by the present invention, wherein the microwave electrodeless ultraviolet lamp has the characteristics of small volume and high power, making the structure of the air purification device compact; by arranging the high-power electrodeless ultraviolet device in the air duct of the air purification device, while filtering large particulate dust in the air, effectively killing the organisms and germs in the air; safe and effective; the present invention has high sterilization efficiency and low production cost by arranging an electrodeless ultraviolet lamp with a simple structure and uniform and comprehensive radiation.

[0040] Of course, without departing from the spirit and essence of the present invention, those skilled in the art should be able to make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. An air purification device capable of killing microorganisms, comprising an air duct, an air pump and a filtering device; characterized in that: It further includes an electrodeless ultraviolet sterilization device which is arranged in the air duct; The electrodeless ultraviolet sterilization device includes a microwave generator, an electrodeless ultraviolet lamp tube, and a uniform radiator; the uniform radiator is a coaxial cable with slits provided thereon; the electrodeless ultraviolet lamp tube is a hollow cylindrical quartz tube with a sandwich layer for hermetically setting mercury and argon; the coaxial cable is arranged in the hollow part of the quartz tube, and the coaxial cable is connected to the microwave generator through a microwave transmission line; The electrodeless ultraviolet sterilization device is arranged behind the filtering device; The slits are provided on the outer conductor of the coaxial cable, and the external electric field distribution of the coaxial cable is uniform; The slits are arranged radially or transversely or obliquely; The coaxial cable is connected to the microwave generator through a microwave coaxial conversion device; The microwave coaxial conversion device includes an output antenna for connecting a magnetron, a coaxial connector for connecting a coaxial cavity, and a conversion cavity for energy feeding; The coaxial connector includes an inner conductor and an outer conductor; the inner conductor of the coaxial connector is higher than the outer conductor; The inner conductor is in a rivet structure, and the radius of the part of the inner conductor close to the output antenna exceeds that of the part far from the output antenna; The part close to the output antenna is the nail head part; The nail head part is in a chamfer structure; The output antenna and the coaxial connector are oppositely arranged at both ends of the conversion cavity.

2. The air purification device capable of killing microorganisms according to claim 1, wherein: The length of the coaxial cable is the same as that of the quartz tube.

3. The air purification device capable of killing microorganisms according to claim 2, wherein: A short circuit surface is further arranged at one end of the electrodeless ultraviolet lamp tube far from the microwave generator.

4. The air purification device capable of killing microorganisms according to claim 3, characterized in that: Sealing structures are provided at both ends of the coaxial cable and the electrodeless ultraviolet lamp tube.

5. The air purification device capable of killing microorganisms according to claim 4, characterized in that: The length of the coaxial cable and the electrodeless ultraviolet lamp tube is 200 mm, and the number of slits of the coaxial cable is 8.

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