CN112837992A - Microwave electrodeless ultraviolet lamp device - Google Patents
Microwave electrodeless ultraviolet lamp device Download PDFInfo
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- CN112837992A CN112837992A CN202110021821.3A CN202110021821A CN112837992A CN 112837992 A CN112837992 A CN 112837992A CN 202110021821 A CN202110021821 A CN 202110021821A CN 112837992 A CN112837992 A CN 112837992A
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- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
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Abstract
The invention discloses a microwave electrodeless ultraviolet lamp device, which belongs to the technical field of microwaves and comprises a radiation rod, a metal net cover and a lamp body; a lamp body is sleeved in the metal mesh enclosure; the radiation rod is sleeved in the lamp body; the lamp body comprises an inner wall layer and an outer wall layer; an interlayer is arranged between the inner wall layer and the outer wall layer; the interlayer is internally sealed with a filler; and a microwave feed-in space is arranged between the inner wall layer and the radiation rod. The microwave electrodeless ultraviolet lamp device has the advantages of compact structure, high power, long service life, capability of radiating ultraviolet light uniformly in all directions, high working efficiency, reduction of microwave leakage, and higher safety and reliability.
Description
Technical Field
The invention belongs to the technical field of microwaves, and particularly relates to a microwave electrodeless ultraviolet lamp device.
Background
With the increasing increase of air pollution and the pursuit of people for quality of life, air purification devices have become standard equipment in households, offices and even public places. Air purification among the prior art generally solves the problem of the adsorption rate and the working time length of dust, but the existence is not only the dust in the air, still has the microorganism, especially during hospital or epidemic situation, and virus aerosol in the air becomes more frightening of people. In the prior art, ultraviolet light has been shown to be effective in killing bacteria and viruses. Ultraviolet light has received much attention in photochemical oxidation because of its strong ultraviolet radiation and the generation of reactive oxidizing species, such as ozone, hydroxyl radicals. The ultraviolet photolysis has the advantages of mild condition, strong oxidation capability, strong practicability and the like. However, most of the currently adopted ultraviolet light sources are traditional extreme mercury lamps, which have the problems of short service life, low power and the like, and greatly limit the application of the ultraviolet light sources in pollution control. Microwave technology can be used to excite ultraviolet light. The existing microwave electrodeless ultraviolet lamp has the defects of not compact size, occupied space, incapability of radiating ultraviolet light uniformly in all directions, microwave leakage problem and insufficient safety. The microwave transmission efficiency and the working efficiency are also to be improved.
Disclosure of Invention
The invention aims to provide a microwave electrodeless ultraviolet lamp device aiming at the defects, and the microwave electrodeless ultraviolet lamp device is used for solving the problems that the existing ultraviolet light source is short in service life, small in power, not compact enough in size, occupied space, incapable of radiating ultraviolet light uniformly in all directions, microwave leakage exists, safety is insufficient, microwave transmission efficiency and working efficiency are to be improved, and the like. In order to achieve the purpose, the invention provides the following technical scheme:
a microwave electrodeless ultraviolet lamp device comprises a radiation bar 1, a metal mesh enclosure 2 and a lamp body 3; the metal net cover 2 is internally sleeved with a lamp body 3; the radiation rod 1 is sleeved in the lamp body 3; the lamp body 3 comprises an inner wall layer 4 and an outer wall layer 5; an interlayer 6 is arranged between the inner wall layer 4 and the outer wall layer 5; the interlayer 6 is internally sealed with filler; a microwave feed-in space 7 is arranged between the inner wall layer 4 and the radiation rod 1. According to the structure, the radiation rod 1, the metal mesh enclosure 2 and the lamp body 3 coaxially extend, microwaves enter the microwave feed-in space 7 from the front end of the microwave feed-in space 7, the radiation rod 1 and the metal mesh enclosure 2 are equivalent to a group of coaxial waveguides, the microwaves can be axially transmitted, and the microwaves fully penetrate through the inner wall layer 4 to fully excite the filler in the interlayer 6 to radiate ultraviolet rays. The inner wall layer 4 and the outer wall layer 5 can be made of transparent quartz, and fillers are sealed in the interlayer 6; the filler can be selected from Hg and I2An easily excitable, ionizable working gas such as Cd, and an inert gas such as Ar, He, Kr, Xe, etc. as a buffer gas. The filling materials in the microwave electrodeless lamp are different, and the emission spectrum range of the microwave electrodeless lamp is also different, such as 185/254/365/405/436/546nm of Hg main radiation band. The radiation rod 1 can be made of copper material, and the surface of the radiation rod is plated with silver. The metal mesh enclosure 2 forms a shielding layer to reduce microwave leakage. The microwave electrodeless ultraviolet lamp device of the invention has the advantages that as the lamp body 3 is positioned between the radiation rod 1 and the metal mesh enclosure 2,compared with the mode that the lamp body 3 is integrally positioned in the waveguide or the waveguide is integrally positioned in the lamp body 3, the structure is compact, the space is saved, the inner wall layer 4 can be comprehensively and uniformly covered by the microwave axial transmission, the filler can radiate ultraviolet light uniformly in all directions, and the sterilization efficiency is high. The shielding layer formed by the metal net cover 2 reduces microwave leakage and has higher safety. Microwave is adopted to excite the filler to radiate ultraviolet, an electrode mercury lamp is abandoned, the service life is longer, and the power is higher.
Further, an outer conductor sleeve 8 is arranged at the front end of the metal mesh enclosure 2; the inner diameter of the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the front section of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; a microwave transition space 9 is arranged between the outer conductor sleeve 8 and the front section of the radiation rod 1; the microwave transition space 9 is communicated with the microwave feed-in space 7. As can be seen from the above structure, the microwaves first enter the microwave transition space 9 and then are fed into the microwave feeding space 7. The inner diameter of at least one section of the outer conductor sleeve 8 is gradually enlarged from the front end to the rear end and is horn-shaped; a small section in front of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the inner diameter of at least one section of the outer conductor sleeve 8 is gradually changed, the outer diameter of a section of the front surface of the radiation rod 1 is gradually changed, and the gradually changed diameters of the inner diameter and the outer diameter are matched, so that the transmission efficiency of the microwave can be improved.
Further, the front end of the outer conductor sleeve 8 is provided with a coaxial head 10; the coaxial head 10 comprises an outer sleeve 11, an inner shaft 12 and a supporting layer 13; the periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13; the inner shaft 12 is connected with the front end of the radiation rod 1; the outer sleeve 11 and the front end of the outer conductor sleeve 8 are fixed; the coaxial head 10 is used for connecting a microwave source; the support layer 13 is used for feeding microwaves into the microwave transition space 9. As can be seen from the above structure, the outer sleeve 11 of the coaxial head 10 is threaded for connection to a microwave source, which may be a magnetron or a solid state source. The microwave input by the microwave source is fed into the microwave transition space 9 after passing through the supporting layer 13; the support layer 13 may be made of teflon. The periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13, so that the inner shaft 12 is fixed relative to the outer sleeve 11; the inner shaft 12 is connected with the front end of the radiation rod 1, so that the radiation rod 1 is stable, the inner shaft 12 and the radiation rod 1 are coaxial, and the front end of the radiation rod 1 can be connected with one end of the inner shaft 12 through threads, so that the radiation rod is convenient to disassemble and assemble.
Further, an air nozzle 14 is arranged on the outer conductor sleeve 8. With the above structure, the air tap 14 can blow air into the microwave transition space 9, and the air flow enters the microwave feeding space 7, so that the heat dissipation of the lamp body 3 can be accelerated.
Further, a short circuit surface 15 is arranged at the rear end of the metal mesh enclosure 2; a plurality of air vents are arranged on the short circuit surface 15; the microwave feed-in space 7 is communicated with the outside through a vent. According to the structure, the short-circuit surface 15 can reflect microwaves, and the reflected microwaves and the original microwaves form standing waves, so that the electric field intensity is improved, and the ultraviolet radiation efficiency of the filler is improved. The short circuit surface 15 is provided with a plurality of air vents, the heat dissipation air flow entering the microwave feed-in space 7 can be discharged to the outside from the air vents, and the heat dissipation air flow can smoothly circulate.
Further, an internal thread sleeve 16 is fixed on the front end face of the short circuit face 15; the internal thread sleeve 16 is sleeved at the rear end of the radiation rod 1 provided with the external thread, so that the internal thread sleeve 16 can be axially adjusted; the rear end of the radiation rod 1 exceeds the rear end of the lamp body 3. According to the structure, the inner thread sleeve 16 is sleeved at the rear end of the radiation rod 1 provided with the outer thread, the inner thread sleeve 16 is rotated, the inner thread sleeve 16 can be axially adjusted, so that the short circuit surface 15 can also be axially adjusted, the electric field distribution of the microwave in the space surrounded by the metal mesh cover 2 and the short circuit surface 15 is changed, the microwave with various powers and wavelengths can be adapted, and the microwave working efficiency is higher.
Further, the inner wall layer 4 of the lamp body 3 is a conical surface with an inner diameter gradually increasing from the front end to the rear end; the thickness of the interlayer 6 of the lamp body 3 becomes thinner from the front end to the rear end. With the above structure, the inner wall layer 4 of the lamp body 3 is a conical surface with an inner diameter gradually increasing from the front end to the rear end, so that the heat dissipation airflow can be blown out spirally along the inner wall layer 4 of the lamp body 3, and the heat of the lamp body 3 is taken away fully; if the lamp body 3 is long in axial dimension, the microwave power density close to the microwave source is larger, the microwave power density far away from the microwave source is smaller, the thickness of the interlayer 6 of the lamp body 3 becomes thinner gradually from the front end to the rear end, so that the filling layer is excited at the front end with larger microwave power density, the filling layer is excited at the rear end with smaller microwave power density, the microwave power can be fully utilized, the working efficiency is improved, and the ultraviolet radiation tends to be more uniform.
Furthermore, the front end of the metal mesh enclosure 2 is provided with an internal thread; the front end of the lamp body 3 is provided with an external thread; the front end of the metal mesh enclosure 2 is connected with an external thread arranged at the rear end of the outer conductor sleeve 8 through an internal thread; the front end of the lamp body 3 is connected with the internal thread arranged at the rear end of the outer conductor sleeve 8 through the external thread. By the structure, the metal mesh enclosure 2, the lamp body 3 and the outer conductor sleeve 8 are detachably connected, so that the parts can be conveniently detached, installed and replaced.
Further, the glass waterproof cover is further included; the metal mesh enclosure 2, the outer conductor sleeve 8 and the coaxial head 10 are integrally arranged in the glass waterproof outer cover. According to the structure, in the scene of underwater application, the metal net cover 2, the outer conductor sleeve 8 and the coaxial head 10 are integrally arranged in the glass waterproof outer cover, so that the underwater operation of the device can be realized.
The invention has the beneficial effects that:
the invention discloses a microwave electrodeless ultraviolet lamp device, which belongs to the technical field of microwaves and comprises a radiation rod, a metal net cover and a lamp body; a lamp body is sleeved in the metal mesh enclosure; the radiation rod is sleeved in the lamp body; the lamp body comprises an inner wall layer and an outer wall layer; an interlayer is arranged between the inner wall layer and the outer wall layer; the interlayer is internally sealed with a filler; and a microwave feed-in space is arranged between the inner wall layer and the radiation rod. The microwave electrodeless ultraviolet lamp device has the advantages of compact structure, high power, long service life, capability of radiating ultraviolet light uniformly in all directions, high working efficiency, reduction of microwave leakage, and higher safety and reliability.
Drawings
FIG. 1 is a schematic sectional view of the first and second embodiments of the present invention;
FIG. 2 is a schematic diagram of the appearance structure of the first and second embodiments of the present invention;
FIG. 3 is a schematic three-dimensional structure of the first and second embodiments of the present invention;
FIG. 4 is a schematic sectional view of a third embodiment of the present invention;
in the drawings: 1-radiation rod, 2-metal net cover, 3-lamp body, 4-inner wall layer, 5-outer wall layer, 6-interlayer, 7-microwave feed-in space, 8-outer conductor sleeve, 9-microwave transition space, 10-coaxial head, 11-outer sleeve, 12-inner shaft, 13-supporting layer, 14-air tap, 15-short circuit surface and 16-internal thread sleeve.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and the embodiments, but the present invention is not limited to the following examples.
The first embodiment is as follows:
see figures 1-3. A microwave electrodeless ultraviolet lamp device comprises a radiation bar 1, a metal mesh enclosure 2 and a lamp body 3; the metal net cover 2 is internally sleeved with a lamp body 3; the radiation rod 1 is sleeved in the lamp body 3; the lamp body 3 comprises an inner wall layer 4 and an outer wall layer 5; an interlayer 6 is arranged between the inner wall layer 4 and the outer wall layer 5; the interlayer 6 is internally sealed with filler; a microwave feed-in space 7 is arranged between the inner wall layer 4 and the radiation rod 1. According to the structure, the radiation rod 1, the metal mesh enclosure 2 and the lamp body 3 coaxially extend, microwaves enter the microwave feed-in space 7 from the front end of the microwave feed-in space 7, the radiation rod 1 and the metal mesh enclosure 2 are equivalent to a group of coaxial waveguides, the microwaves can be axially transmitted, and the microwaves fully penetrate through the inner wall layer 4 to fully excite the filler in the interlayer 6 to radiate ultraviolet rays. The inner wall layer 4 and the outer wall layer 5 can be made of transparent quartz, and fillers are sealed in the interlayer 6; the filling material can be selected from easily excited and ionized working gases such as Hg, I2, Cd and the like and inert gases such as Ar, He, Kr, Xe and the like which are used as buffer gases. The filling materials in the microwave electrodeless lamp are different, and the emission spectrum range of the microwave electrodeless lamp is also different, such as 185/254/365/405/436/546nm of Hg main radiation band. The radiation rod 1 can be made of copper material, and the surface of the radiation rod is plated with silver. The metal mesh enclosure 2 forms a shielding layer to reduce microwave leakage. According to the microwave electrodeless ultraviolet lamp device, as the lamp body 3 is positioned between the radiation rod 1 and the metal mesh enclosure 2, compared with the mode that the lamp body 3 is integrally positioned in the waveguide or the waveguide is integrally positioned in the lamp body 3, the microwave electrodeless ultraviolet lamp device has a compact structure and saves space, and the microwave is axially transmitted, so that the inner wall layer 4 can be comprehensively and uniformly covered, and ultraviolet light can be comprehensively and uniformly radiated by fillers. The shielding layer formed by the metal net cover 2 reduces microwave leakage and has higher safety. Microwave is adopted to excite the filler to radiate ultraviolet, an electrode mercury lamp is abandoned, the service life is longer, and the power is higher.
Example two:
see figures 1-3. A microwave electrodeless ultraviolet lamp device comprises a radiation bar 1, a metal mesh enclosure 2 and a lamp body 3; the metal net cover 2 is internally sleeved with a lamp body 3; the radiation rod 1 is sleeved in the lamp body 3; the lamp body 3 comprises an inner wall layer 4 and an outer wall layer 5; an interlayer 6 is arranged between the inner wall layer 4 and the outer wall layer 5; the interlayer 6 is internally sealed with filler; a microwave feed-in space 7 is arranged between the inner wall layer 4 and the radiation rod 1. According to the structure, the radiation rod 1, the metal mesh enclosure 2 and the lamp body 3 coaxially extend, microwaves enter the microwave feed-in space 7 from the front end of the microwave feed-in space 7, the radiation rod 1 and the metal mesh enclosure 2 are equivalent to a group of coaxial waveguides, the microwaves can be axially transmitted, and the microwaves fully penetrate through the inner wall layer 4 to fully excite the filler in the interlayer 6 to radiate ultraviolet rays. The inner wall layer 4 and the outer wall layer 5 can be made of transparent quartz, and fillers are sealed in the interlayer 6; the filling material can be selected from easily excited and ionized working gases such as Hg, I2, Cd and the like and inert gases such as Ar, He, Kr, Xe and the like which are used as buffer gases. The filling materials in the microwave electrodeless lamp are different, and the emission spectrum range of the microwave electrodeless lamp is also different, such as 185/254/365/405/436/546nm of Hg main radiation band. The radiation rod 1 can be made of copper material, and the surface of the radiation rod is plated with silver. The metal mesh enclosure 2 forms a shielding layer to reduce microwave leakage. According to the microwave electrodeless ultraviolet lamp device, as the lamp body 3 is positioned between the radiation rod 1 and the metal mesh enclosure 2, compared with the mode that the lamp body 3 is integrally positioned in the waveguide or the waveguide is integrally positioned in the lamp body 3, the microwave electrodeless ultraviolet lamp device has a compact structure and saves space, and the microwave is axially transmitted, so that the inner wall layer 4 can be comprehensively and uniformly covered, and ultraviolet light can be comprehensively and uniformly radiated by fillers. The shielding layer formed by the metal net cover 2 reduces microwave leakage and has higher safety. Microwave is adopted to excite the filler to radiate ultraviolet, an electrode mercury lamp is abandoned, the service life is longer, and the power is higher.
The front end of the metal mesh enclosure 2 is provided with an outer conductor sleeve 8; the inner diameter of the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the front section of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; a microwave transition space 9 is arranged between the outer conductor sleeve 8 and the front section of the radiation rod 1; the microwave transition space 9 is communicated with the microwave feed-in space 7. As can be seen from the above structure, the microwaves first enter the microwave transition space 9 and then are fed into the microwave feeding space 7. The inner diameter of at least one section of the outer conductor sleeve 8 is gradually enlarged from the front end to the rear end and is horn-shaped; a small section in front of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the inner diameter of at least one section of the outer conductor sleeve 8 is gradually changed, the outer diameter of a section of the front surface of the radiation rod 1 is gradually changed, and the gradually changed diameters of the inner diameter and the outer diameter are matched, so that the transmission efficiency of the microwave can be improved.
The front end of the outer conductor sleeve 8 is provided with a coaxial head 10; the coaxial head 10 comprises an outer sleeve 11, an inner shaft 12 and a supporting layer 13; the periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13; the inner shaft 12 is connected with the front end of the radiation rod 1; the outer sleeve 11 and the front end of the outer conductor sleeve 8 are fixed; the coaxial head 10 is used for connecting a microwave source; the support layer 13 is used for feeding microwaves into the microwave transition space 9. As can be seen from the above structure, the outer sleeve 11 of the coaxial head 10 is threaded for connection to a microwave source, which may be a magnetron or a solid state source. The microwave input by the microwave source is fed into the microwave transition space 9 after passing through the supporting layer 13; the support layer 13 may be made of teflon. The periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13, so that the inner shaft 12 is fixed relative to the outer sleeve 11; the inner shaft 12 is connected with the front end of the radiation rod 1, so that the radiation rod 1 is stable, the inner shaft 12 and the radiation rod 1 are coaxial, and the front end of the radiation rod 1 can be connected with one end of the inner shaft 12 through threads, so that the radiation rod is convenient to disassemble and assemble.
And an air nozzle 14 is arranged on the outer conductor sleeve 8. With the above structure, the air tap 14 can blow air into the microwave transition space 9, and the air flow enters the microwave feeding space 7, so that the heat dissipation of the lamp body 3 can be accelerated.
The rear end of the metal mesh enclosure 2 is provided with a short circuit surface 15; a plurality of air vents are arranged on the short circuit surface 15; the microwave feed-in space 7 is communicated with the outside through a vent. According to the structure, the short-circuit surface 15 can reflect microwaves, and the reflected microwaves and the original microwaves form standing waves, so that the electric field intensity is improved, and the ultraviolet radiation efficiency of the filler is improved. The short circuit surface 15 is provided with a plurality of air vents, the heat dissipation air flow entering the microwave feed-in space 7 can be discharged to the outside from the air vents, and the heat dissipation air flow can smoothly circulate.
Example three:
see figure 4. A microwave electrodeless ultraviolet lamp device comprises a radiation bar 1, a metal mesh enclosure 2 and a lamp body 3; the metal net cover 2 is internally sleeved with a lamp body 3; the radiation rod 1 is sleeved in the lamp body 3; the lamp body 3 comprises an inner wall layer 4 and an outer wall layer 5; an interlayer 6 is arranged between the inner wall layer 4 and the outer wall layer 5; the interlayer 6 is internally sealed with filler; a microwave feed-in space 7 is arranged between the inner wall layer 4 and the radiation rod 1. According to the structure, the radiation rod 1, the metal mesh enclosure 2 and the lamp body 3 coaxially extend, microwaves enter the microwave feed-in space 7 from the front end of the microwave feed-in space 7, the radiation rod 1 and the metal mesh enclosure 2 are equivalent to a group of coaxial waveguides, the microwaves can be axially transmitted, and the microwaves fully penetrate through the inner wall layer 4 to fully excite the filler in the interlayer 6 to radiate ultraviolet rays. The inner wall layer 4 and the outer wall layer 5 can be made of transparent quartz, and fillers are sealed in the interlayer 6; the filling material can be selected from easily excited and ionized working gases such as Hg, I2, Cd and the like and inert gases such as Ar, He, Kr, Xe and the like which are used as buffer gases. The filling materials in the microwave electrodeless lamp are different, and the emission spectrum range of the microwave electrodeless lamp is also different, such as 185/254/365/405/436/546nm of Hg main radiation band. The radiation rod 1 can be made of copper material, and the surface of the radiation rod is plated with silver. The metal mesh enclosure 2 forms a shielding layer to reduce microwave leakage. According to the microwave electrodeless ultraviolet lamp device, as the lamp body 3 is positioned between the radiation rod 1 and the metal mesh enclosure 2, compared with the mode that the lamp body 3 is integrally positioned in the waveguide or the waveguide is integrally positioned in the lamp body 3, the microwave electrodeless ultraviolet lamp device has a compact structure and saves space, and the microwave is axially transmitted, so that the inner wall layer 4 can be comprehensively and uniformly covered, and ultraviolet light can be comprehensively and uniformly radiated by fillers. The shielding layer formed by the metal net cover 2 reduces microwave leakage and has higher safety. Microwave is adopted to excite the filler to radiate ultraviolet, an electrode mercury lamp is abandoned, the service life is longer, and the power is higher.
The front end of the metal mesh enclosure 2 is provided with an outer conductor sleeve 8; the inner diameter of the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the front section of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; a microwave transition space 9 is arranged between the outer conductor sleeve 8 and the front section of the radiation rod 1; the microwave transition space 9 is communicated with the microwave feed-in space 7. As can be seen from the above structure, the microwaves first enter the microwave transition space 9 and then are fed into the microwave feeding space 7. The inner diameter of at least one section of the outer conductor sleeve 8 is gradually enlarged from the front end to the rear end and is horn-shaped; a small section in front of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the inner diameter of at least one section of the outer conductor sleeve 8 is gradually changed, the outer diameter of a section of the front surface of the radiation rod 1 is gradually changed, and the gradually changed diameters of the inner diameter and the outer diameter are matched, so that the transmission efficiency of the microwave can be improved.
The front end of the outer conductor sleeve 8 is provided with a coaxial head 10; the coaxial head 10 comprises an outer sleeve 11, an inner shaft 12 and a supporting layer 13; the periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13; the inner shaft 12 is connected with the front end of the radiation rod 1; the outer sleeve 11 and the front end of the outer conductor sleeve 8 are fixed; the coaxial head 10 is used for connecting a microwave source; the support layer 13 is used for feeding microwaves into the microwave transition space 9. As can be seen from the above structure, the outer sleeve 11 of the coaxial head 10 is threaded for connection to a microwave source, which may be a magnetron or a solid state source. The microwave input by the microwave source is fed into the microwave transition space 9 after passing through the supporting layer 13; the support layer 13 may be made of teflon. The periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13, so that the inner shaft 12 is fixed relative to the outer sleeve 11; the inner shaft 12 is connected with the front end of the radiation rod 1, so that the radiation rod 1 is stable, the inner shaft 12 and the radiation rod 1 are coaxial, and the front end of the radiation rod 1 can be connected with one end of the inner shaft 12 through threads, so that the radiation rod is convenient to disassemble and assemble.
And an air nozzle 14 is arranged on the outer conductor sleeve 8. With the above structure, the air tap 14 can blow air into the microwave transition space 9, and the air flow enters the microwave feeding space 7, so that the heat dissipation of the lamp body 3 can be accelerated.
The rear end of the metal mesh enclosure 2 is provided with a short circuit surface 15; a plurality of air vents are arranged on the short circuit surface 15; the microwave feed-in space 7 is communicated with the outside through a vent. According to the structure, the short-circuit surface 15 can reflect microwaves, and the reflected microwaves and the original microwaves form standing waves, so that the electric field intensity is improved, and the ultraviolet radiation efficiency of the filler is improved. The short circuit surface 15 is provided with a plurality of air vents, the heat dissipation air flow entering the microwave feed-in space 7 can be discharged to the outside from the air vents, and the heat dissipation air flow can smoothly circulate.
An internal thread sleeve 16 is fixed on the front end face of the short circuit face 15; the internal thread sleeve 16 is sleeved at the rear end of the radiation rod 1 provided with the external thread, so that the internal thread sleeve 16 can be axially adjusted; the rear end of the radiation rod 1 exceeds the rear end of the lamp body 3. According to the structure, the inner thread sleeve 16 is sleeved at the rear end of the radiation rod 1 provided with the outer thread, the inner thread sleeve 16 is rotated, the inner thread sleeve 16 can be axially adjusted, so that the short circuit surface 15 can also be axially adjusted, the electric field distribution of the microwave in the space surrounded by the metal mesh cover 2 and the short circuit surface 15 is changed, the microwave with various powers and wavelengths can be adapted, and the microwave working efficiency is higher.
The inner wall layer 4 of the lamp body 3 is a conical surface with the inner diameter gradually increasing from the front end to the rear end; the thickness of the interlayer 6 of the lamp body 3 becomes thinner from the front end to the rear end. With the above structure, the inner wall layer 4 of the lamp body 3 is a conical surface with an inner diameter gradually increasing from the front end to the rear end, so that the heat dissipation airflow can be blown out spirally along the inner wall layer 4 of the lamp body 3, and the heat of the lamp body 3 is taken away fully; if the lamp body 3 is long in axial dimension, the microwave power density close to the microwave source is larger, the microwave power density far away from the microwave source is smaller, the thickness of the interlayer 6 of the lamp body 3 becomes thinner gradually from the front end to the rear end, so that the filling layer is excited at the front end with larger microwave power density, the filling layer is excited at the rear end with smaller microwave power density, the microwave power can be fully utilized, the working efficiency is improved, and the ultraviolet radiation tends to be more uniform.
The front end of the metal mesh enclosure 2 is provided with internal threads; the front end of the lamp body 3 is provided with an external thread; the front end of the metal mesh enclosure 2 is connected with an external thread arranged at the rear end of the outer conductor sleeve 8 through an internal thread; the front end of the lamp body 3 is connected with the internal thread arranged at the rear end of the outer conductor sleeve 8 through the external thread. By the structure, the metal mesh enclosure 2, the lamp body 3 and the outer conductor sleeve 8 are detachably connected, so that the parts can be conveniently detached, installed and replaced.
Example four:
a microwave electrodeless ultraviolet lamp device comprises a radiation bar 1, a metal mesh enclosure 2 and a lamp body 3; the metal net cover 2 is internally sleeved with a lamp body 3; the radiation rod 1 is sleeved in the lamp body 3; the lamp body 3 comprises an inner wall layer 4 and an outer wall layer 5; an interlayer 6 is arranged between the inner wall layer 4 and the outer wall layer 5; the interlayer 6 is internally sealed with filler; a microwave feed-in space 7 is arranged between the inner wall layer 4 and the radiation rod 1. According to the structure, the radiation rod 1, the metal mesh enclosure 2 and the lamp body 3 coaxially extend, microwaves enter the microwave feed-in space 7 from the front end of the microwave feed-in space 7, the radiation rod 1 and the metal mesh enclosure 2 are equivalent to a group of coaxial waveguides, the microwaves can be axially transmitted, and the microwaves fully penetrate through the inner wall layer 4 to fully excite the filler in the interlayer 6 to radiate ultraviolet rays. The inner wall layer 4 and the outer wall layer 5 can be made of transparent quartz, and fillers are sealed in the interlayer 6; the filling material can be selected from easily excited and ionized working gases such as Hg, I2, Cd and the like and inert gases such as Ar, He, Kr, Xe and the like which are used as buffer gases. The filling materials in the microwave electrodeless lamp are different, and the emission spectrum range of the microwave electrodeless lamp is also different, such as 185/254/365/405/436/546nm of Hg main radiation band. The radiation rod 1 can be made of copper material, and the surface of the radiation rod is plated with silver. The metal mesh enclosure 2 forms a shielding layer to reduce microwave leakage. According to the microwave electrodeless ultraviolet lamp device, as the lamp body 3 is positioned between the radiation rod 1 and the metal mesh enclosure 2, compared with the mode that the lamp body 3 is integrally positioned in the waveguide or the waveguide is integrally positioned in the lamp body 3, the microwave electrodeless ultraviolet lamp device has a compact structure and saves space, and the microwave is axially transmitted, so that the inner wall layer 4 can be comprehensively and uniformly covered, and ultraviolet light can be comprehensively and uniformly radiated by fillers. The shielding layer formed by the metal net cover 2 reduces microwave leakage and has higher safety. Microwave is adopted to excite the filler to radiate ultraviolet, an electrode mercury lamp is abandoned, the service life is longer, and the power is higher.
The front end of the metal mesh enclosure 2 is provided with an outer conductor sleeve 8; the inner diameter of the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the front section of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; a microwave transition space 9 is arranged between the outer conductor sleeve 8 and the front section of the radiation rod 1; the microwave transition space 9 is communicated with the microwave feed-in space 7. As can be seen from the above structure, the microwaves first enter the microwave transition space 9 and then are fed into the microwave feeding space 7. The inner diameter of at least one section of the outer conductor sleeve 8 is gradually enlarged from the front end to the rear end and is horn-shaped; a small section in front of the radiation rod 1 extends into the outer conductor sleeve 8, and the outer diameter of the radiation rod 1 in the outer conductor sleeve 8 is gradually increased from the front end to the rear end; the inner diameter of at least one section of the outer conductor sleeve 8 is gradually changed, the outer diameter of a section of the front surface of the radiation rod 1 is gradually changed, and the gradually changed diameters of the inner diameter and the outer diameter are matched, so that the transmission efficiency of the microwave can be improved.
The front end of the outer conductor sleeve 8 is provided with a coaxial head 10; the coaxial head 10 comprises an outer sleeve 11, an inner shaft 12 and a supporting layer 13; the periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13; the inner shaft 12 is connected with the front end of the radiation rod 1; the outer sleeve 11 and the front end of the outer conductor sleeve 8 are fixed; the coaxial head 10 is used for connecting a microwave source; the support layer 13 is used for feeding microwaves into the microwave transition space 9. As can be seen from the above structure, the outer sleeve 11 of the coaxial head 10 is threaded for connection to a microwave source, which may be a magnetron or a solid state source. The microwave input by the microwave source is fed into the microwave transition space 9 after passing through the supporting layer 13; the support layer 13 may be made of teflon. The periphery of the inner shaft 12 is connected with the inner wall of the outer sleeve 11 through a supporting layer 13, so that the inner shaft 12 is fixed relative to the outer sleeve 11; the inner shaft 12 is connected with the front end of the radiation rod 1, so that the radiation rod 1 is stable, the inner shaft 12 and the radiation rod 1 are coaxial, and the front end of the radiation rod 1 can be connected with one end of the inner shaft 12 through threads, so that the radiation rod is convenient to disassemble and assemble.
The glass waterproof outer cover is also included; the metal mesh enclosure 2, the outer conductor sleeve 8 and the coaxial head 10 are integrally arranged in the glass waterproof outer cover. According to the structure, in the scene of underwater application, the metal net cover 2, the outer conductor sleeve 8 and the coaxial head 10 are integrally arranged in the glass waterproof outer cover, so that the underwater operation of the device can be realized.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A microwave electrodeless ultraviolet lamp device is characterized in that: comprises a radiation rod (1), a metal mesh enclosure (2) and a lamp body (3); a lamp body (3) is sleeved in the metal mesh enclosure (2); the radiation rod (1) is sleeved in the lamp body (3); the lamp body (3) comprises an inner wall layer (4) and an outer wall layer (5); an interlayer (6) is arranged between the inner wall layer (4) and the outer wall layer (5); the interlayer (6) is internally sealed with filler; a microwave feed-in space (7) is arranged between the inner wall layer (4) and the radiation rod (1).
2. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 1, wherein: the front end of the metal mesh enclosure (2) is provided with an outer conductor sleeve (8); the inner diameter of the outer conductor sleeve (8) is gradually increased from the front end to the rear end; the front section of the radiation rod (1) extends into the outer conductor sleeve (8), and the outer diameter of the radiation rod (1) in the outer conductor sleeve (8) is gradually increased from the front end to the rear end; a microwave transition space (9) is arranged between the outer conductor sleeve (8) and the front section of the radiation rod (1); the microwave transition space (9) is communicated with the microwave feed-in space (7).
3. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 2, wherein: the front end of the outer conductor sleeve (8) is provided with a coaxial head (10); the coaxial head (10) comprises an outer sleeve (11), an inner shaft (12) and a supporting layer (13); the periphery of the inner shaft (12) is connected with the inner wall of the outer sleeve (11) through a supporting layer (13); the inner shaft (12) is connected with the front end of the radiation rod (1); the outer sleeve (11) is fixed with the front end of the outer conductor sleeve (8); the coaxial head (10) is used for connecting a microwave source; the support layer (13) is used for feeding microwaves into the microwave transition space (9).
4. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 2, wherein: and an air nozzle (14) is arranged on the outer conductor sleeve (8).
5. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 4, wherein: a short circuit surface (15) is arranged at the rear end of the metal mesh enclosure (2); a plurality of air vents are arranged on the short circuit surface (15); the microwave feed-in space (7) is communicated with the outside through a vent.
6. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 5, wherein: an internal thread sleeve (16) is fixed on the front end face of the short circuit face (15); the internal thread sleeve (16) is sleeved at the rear end of the radiation rod (1) provided with the external thread, so that the internal thread sleeve (16) can be axially adjusted; the rear end of the radiation rod (1) exceeds the rear end of the lamp body (3).
7. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 5, wherein: the inner wall layer (4) of the lamp body (3) is a conical surface with the inner diameter gradually increased from the front end to the rear end; the thickness of the interlayer (6) of the lamp body (3) becomes thinner gradually from the front end to the rear end.
8. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 2, wherein: the front end of the metal mesh enclosure (2) is provided with an internal thread; the front end of the lamp body (3) is provided with an external thread; the front end of the metal mesh enclosure (2) is connected with an external thread arranged at the rear end of the outer conductor sleeve (8) through an internal thread; the front end of the lamp body (3) is connected with the internal thread arranged at the rear end of the outer conductor sleeve (8) through the external thread.
9. The microwave electrodeless ultraviolet lamp apparatus as claimed in claim 3, wherein: the glass waterproof outer cover is also included; the metal mesh enclosure (2), the outer conductor sleeve (8) and the coaxial head (10) are integrally arranged in the glass waterproof outer cover.
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