A deep ultraviolet LED germicidal bulb

Abstract

The present invention discloses a deep ultraviolet LED germicidal bulb, which relates to the field of semiconductor lamp technology. The bulb comprises a lamp housing, a conductive bracket, a stem, and a lamp holder. The conductive bracket is disposed in the inner cavity of the lamp housing. The conductive bracket comprises an upper shell, a top surface of which is provided with a plurality of light-emitting cups, each of which is provided with a deep ultraviolet light-emitting diode chip. The deep ultraviolet light-emitting diode chips are connected by a conductive circuit. The lamp housing is provided with a lamp housing tube connected to the inner cavity of the lamp housing. The stem is sealed and connected to the lamp housing tube. The lamp holder is connected to the lamp housing tube. A power board is provided in the lamp holder. A connection point insulated from the lamp holder is provided at the top of the lamp holder. The two ends of the conductive circuit are respectively connected to the positive and negative poles of the power board through wires on the stem. The lamp holder and the connection point are respectively connected to two input lines of the power board. The present invention enables deep ultraviolet energy to irradiate a longer distance, thereby improving the utilization rate of radiated deep ultraviolet energy.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor lamps, and in particular to a deep ultraviolet LED germicidal bulb. Background Art

[0002] Deep ultraviolet light-emitting diodes (UVC LEDs) have the advantages of high reliability, long life, fast response, low power consumption, and environmental protection and pollution-free. They are widely used in water sterilization and disinfection, air sterilization and disinfection, surface sterilization and disinfection and other fields. To ensure the sterilization and disinfection effect, the deep ultraviolet sterilization dose required for sterilization must be guaranteed. Due to the scattering of deep ultraviolet photons in the atmosphere, the energy transmission direction of ultraviolet light changes. The attenuation caused by the absorption of deep ultraviolet photons during transmission limits the transmission of ultraviolet light to a certain distance. At present, the WPE efficiency of deep ultraviolet LED chips is only about 5%. The side light output of deep ultraviolet LED chips TM is the main light output surface, which also limits the transmission distance of deep ultraviolet light energy and the range requirements of transmission distance irradiation. Summary of the Invention

[0003] The purpose of the present invention is to provide a deep ultraviolet LED germicidal bulb to solve the problems existing in the above-mentioned prior art, so as to enable deep ultraviolet energy to irradiate a longer distance and improve the utilization rate of radiated deep ultraviolet energy.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a deep ultraviolet LED sterilization bulb, comprising a lamp housing, a conductive bracket, a stem and a lamp holder, wherein the conductive bracket is arranged in the inner cavity of the lamp housing, the conductive bracket comprises an upper shell, the top surface of the upper shell is provided with a plurality of light-emitting cups, each of the light-emitting cups is provided with a deep ultraviolet light-emitting diode chip, and each of the deep ultraviolet light-emitting diode chips is connected by a conductive circuit, the lamp housing is provided with a lamp housing tube connected to the inner cavity of the lamp housing, the stem is sealed and connected to the lamp housing tube, the lamp holder is connected to the lamp housing tube, a power board is provided in the lamp holder, a connection point insulated from the lamp holder is provided on the top of the lamp holder, the two ends of the conductive circuit are respectively connected to the positive and negative poles of the power board through the wires on the stem, and the lamp holder and the connection point are respectively connected to the two input lines of the power board.

[0006] Preferably, a T-shaped groove is provided on the bottom surface of the upper shell, a square groove is provided at the bottom of the T-shaped groove, the conductive circuit is installed in the square groove, and a lower shell matching the T-shaped groove is installed in the T-shaped groove. The bottom surface of each light output cup is provided with two connecting holes connected to the square groove, and each light output cup is provided with two soldering pads, and the two soldering pads are respectively connected to the two electrodes of the deep ultraviolet light-emitting diode chip, and each soldering pad bottom surface is provided with a soldering pad column, and the soldering pad columns on the bottom surfaces of the two soldering pads in one light output cup are respectively connected to the conductive circuit through the two connecting holes.

[0007] Preferably, a metal terminal is sleeved at both ends of the conductive bracket, a rivet hole is provided on the metal terminal, and fixing holes corresponding to the rivet hole are provided at both ends of the upper shell, the conductive circuit and the lower shell, and the conductive bracket is riveted to the metal terminal by passing a rivet through the rivet hole and the corresponding fixing hole.

[0008] Preferably, the conductive bracket is a spiral conductive bracket, and the spiral radius of the conductive bracket gradually increases from the top to the bottom; the conductive wire includes two nickel wires and electrode wires respectively connected to the two nickel wires, the two nickel wires are respectively welded to the two metal terminals, and the two electrode wires are respectively connected to the positive and negative poles of the power board.

[0009] Preferably, an exhaust pipe communicating with the interior of the lamp housing tube is provided on the stem, and the exhaust pipe is used to extract the air in the lamp housing and the lamp housing tube and inject inert gas. After the inert gas is injected, the exhaust pipe is sealed.

[0010] Preferably, a lock buckle is provided on the top of the lamp holder, the outer ring of the lock buckle is made of insulating material, and the inner ring is made of metal material. The lock buckle is connected to the lamp holder through the insulating material of its outer ring, and the connection point is located on the inner ring of the lock buckle.

[0011] Preferably, a sealing plate is provided at the bottom end of the stem, and the port of the lamp housing tube is sealed and bonded to the sealing plate by flame sintering.

[0012] Preferably, the upper shell and the lower shell are both made of high-temperature resistant, UV-resistant and highly reflective resin materials, and are integrally compacted and formed by using a suspended resin through a molding machine.

[0013] Preferably, the two electrode wires are respectively passed through an insulating tube and then welded to the positive and negative electrodes of the power board.

[0014] Preferably, the conductive circuit includes a plurality of copper sheets matching the square grooves, the copper sheets are formed by a mold punch, and a solder pad column fixing hole is provided at one end of two adjacent copper sheets close to each other, and the two solder pad column fixing holes correspond to the two solder pad columns respectively, and the solder pad columns and the copper sheets are connected by welding with metal solder.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The present invention provides a deep ultraviolet LED germicidal bulb. By installing a deep ultraviolet light-emitting diode chip in a focusing light output cup, the side light of the deep ultraviolet light-emitting diode chip is focused through the light output cup, so that the deep ultraviolet energy radiated by the germicidal bulb can be irradiated at a longer distance, thereby improving the utilization rate of the deep ultraviolet energy radiated by the deep ultraviolet light-emitting diode chip by the germicidal bulb. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the deep ultraviolet LED germicidal bulb provided by the present invention;

[0019] Figure 2 Schematic diagram of the explosion of the deep ultraviolet LED germicidal bulb provided by the present invention;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of the conductive bracket in the present invention;

[0021] Figure 4 Schematic diagram of the explosion of the conductive bracket in the present invention;

[0022] Figure 5 A bottom view of the conductive bracket of the present invention;

[0023] Figure 6 A top view of the connection structure between the conductive bracket and the deep ultraviolet light-emitting diode chip in the present invention;

[0024] Figure 7 Schematic diagram of the three-dimensional structure of the upper shell in the present invention;

[0025] Figure 8 Schematic diagram of the three-dimensional structure of the conductive circuit in the present invention;

[0026] Figure 9 Schematic diagram of the three-dimensional structure of the lower shell in the present invention;

[0027] Figure 10 for Figure 8 A partial enlarged schematic diagram of part A;

[0028] Figure 11 Schematic diagram of the three-dimensional structure of a solder pad in a light emitting cup in the present invention;

[0029] Figure 12 A cross-sectional view of the upper housing at the light output cup position in the present invention;

[0030] Figure 13 This is a cross-sectional view of the connection structure between the conductive bracket and the deep ultraviolet light-emitting diode chip in the present invention;

[0031] Figure 14 This is a cross-sectional view of the connection structure between the conductive bracket and the metal terminal in the present invention;

[0032] Figure 15 Schematic diagram of the three-dimensional structure of the connection between the conductive bracket and the core column in the present invention;

[0033] Figure 16 Schematic diagram of the three-dimensional structure of the connection between the conductive bracket and the metal terminal in the present invention;

[0034] Figure 17 Schematic diagram of the bubble sealing in the present invention;

[0035] Figure 18 This is a schematic diagram of the installation of the power board in the present invention;

[0036] In the figure: 100-deep ultraviolet LED sterilization bulb, 1-lamp housing, 2-conductive bracket, 3-core column, 4-lamp holder, 5-upper shell, 6-light output cup, 7-deep ultraviolet light-emitting diode chip, 8-conductive circuit, 9-lamp housing tube, 10-power board, 11-connection point, 12-wire, 13-T-slot, 14-square slot, 15-lower shell, 16-connection hole, 17-soldering pad, 18-soldering pad column, 19-metal terminal, 20-riveting hole, 21-fixing hole, 22-rivet, 23-nickel wire, 24-electrode guide wire, 25-exhaust pipe, 26-lock buckle, 27-sealing plate, 28-insulating tube, 29-copper sheet, 30-soldering pad column fixing hole, 31-input line. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] The purpose of the present invention is to provide a deep ultraviolet LED germicidal bulb to solve the problems existing in the prior art, so as to enable deep ultraviolet energy to irradiate a longer distance and improve the utilization rate of the radiated deep ultraviolet energy.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1-18 As shown, this embodiment provides a deep ultraviolet LED sterilization bulb 100, including a lamp housing 1, a conductive bracket 2, a core column 3 and a lamp holder 4. The conductive bracket 2 is arranged in the inner cavity of the lamp housing 1, and the conductive bracket 2 includes an upper shell 5. The top surface of the upper shell 5 is provided with a plurality of light-emitting cups 6. Each light-emitting cup 6 is provided with a deep ultraviolet light-emitting diode chip 7. Each deep ultraviolet light-emitting diode chip 7 is connected by a conductive circuit 8. The lamp housing 1 is provided with a lamp housing tube 9 connected to the inner cavity of the lamp housing 1. The core column 3 is sealed in the lamp housing tube 9, and the lamp holder 4 is connected to the lamp housing tube 9. A power board 10 is provided in the lamp holder 4, and a connection point 11 insulated from the lamp holder 4 is provided on the top of the lamp holder 4. The two ends of the conductive circuit 8 are respectively connected to the positive and negative poles of the power board 10 through the wires 12 on the core column 3, and the lamp holder 4 and the connection point 11 are respectively connected to the two input lines 31 of the power board 10.

[0041] During use, the lamp holder 4 and the connection point 11 are energized to supply power to the power board 10, which converts the AC power into a constant current output. The power board 10 conducts the power to each deep ultraviolet light-emitting diode chip 7 through the stem 3 and the conductive line 8. The ultraviolet light energy emitted by the deep ultraviolet light-emitting diode chip 7 is concentrated by the light output cup 6, allowing the deep ultraviolet energy radiated by the germicidal bulb to irradiate a longer distance, thereby improving the germicidal bulb's utilization of the deep ultraviolet energy radiated by the deep ultraviolet light-emitting diode chip. The lamp housing 1 is a transparent quartz lamp housing, the lamp holder 4 is welded to the quartz lamp housing, and glue is applied to the mouth of the lamp holder 4. The lamp housing 1 and the lamp holder 4 are connected by pressing, and the lamp holder 4 and the lamp housing 1 are firmly fixed by temperature control.

[0042] In this embodiment, the bottom surface of the upper housing 5 is provided with a T-shaped slot 13, and the bottom of the T-shaped slot 13 is provided with a square slot 14. The conductive circuit 8 is installed in the square slot 14. The T-shaped slot 13 is installed with a lower housing 15 that matches the T-shaped slot 13. The bottom surface of each light output cup 6 is provided with two connection holes 16 that communicate with the square slot 14. Each light output cup 6 is provided with two solder pads 17, which are respectively connected to the two electrodes of the deep ultraviolet light emitting diode chip 7. The bottom surface of each solder pad 17 is provided with a solder pad post 18. The solder pad posts 18 on the bottom surfaces of the two solder pads 17 in a light output cup 6 are connected to the conductive circuit 8 through the two connection holes 16. The T-shaped slot 13 can be used to clamp the lower housing 15 to the bottom of the upper housing 5 and press the conductive circuit 8 into the square slot 14, making installation convenient. Two connection holes 16 are symmetrically arranged on the inner bottom surface of the light output cup 6. A soldering pad 18 passes through the connection holes 16 and is soldered to the conductive circuit 8, thereby connecting the deep ultraviolet light-emitting diode chip 7 via the conductive circuit 8. The soldering pad 17 is made of copper metal and is molded into a semicircular structure through a mold. A layer of nickel-palladium-gold is electroplated on the soldering pad 17. The two soldering pads 17 form an independent, non-interconnected soldering pad structure within the light output cup 6.

[0043] In this embodiment, a metal terminal 19 is sleeved on both ends of the conductive bracket 2, and a rivet hole 20 is provided on the metal terminal 19. Fixing holes 21 corresponding to the rivet holes 20 are provided at both ends of the upper shell 5, the conductive circuit 8 and the lower shell 15. The conductive bracket 2 and the metal terminal 19 are riveted together by passing a rivet 22 through the rivet hole 20 and the corresponding fixing hole 21. The structure is simple and the installation is convenient, and it is convenient to power the conductive circuit 8 through the metal terminals 19 at both ends, so that the deep ultraviolet light-emitting diode chip 7 emits light.

[0044] In this embodiment, the conductive support 2 is a spiral-shaped conductive support, and the spiral radius of the conductive support 2 gradually increases from the top to the bottom. The wire 12 includes two nickel wires 23 and electrode wires 24 respectively connected to the two nickel wires 23. The two nickel wires 23 are respectively welded to two metal terminals 19, and the two electrode wires 24 are respectively connected to the positive and negative poles of the power board 10. The nickel wires 23 and the metal terminals 19 are fixed by spot welding. The deep ultraviolet light-emitting diode chips 7 in each spiral are not blocked by the conductive support 2 above them, ensuring that the ultraviolet light emitted by them can be fully utilized.

[0045] In this embodiment, an exhaust pipe 25 is provided on the stem 3 and communicates with the interior of the lamp housing tube 9. Exhaust pipe 25 is used to extract air from the lamp housing 1 and lamp housing tube 9 and inject inert gas. After the inert gas is injected, exhaust pipe 25 is sealed. Using negative pressure and a gas filling device, the air in the lamp housing 1 and lamp housing tube 9 is first evacuated through exhaust pipe 25. Then, inert gas is injected into the exhaust pipe 25, and the exhaust pipe 25 is sealed by flame sintering and welding.

[0046] In this embodiment, a lock buckle 26 is provided on the top of the lamp holder 4. The outer ring of the lock buckle 26 is made of insulating material, and the inner ring is made of metal. The lock buckle 26 is connected to the lamp holder 4 through the insulating material of its outer ring, and the connection point 11 is located on the inner ring of the lock buckle 26. One input line 31 of the power supply board 10 is welded to the lamp holder 4, and the other input line 31 is welded to the lock buckle hole in the inner ring of the lock buckle 26.

[0047] In this embodiment, a sealing plate 27 is provided at the bottom end of the stem 3. The end of the lamp housing tube 9 is sealed and bonded to the sealing plate 27 via flame sintering. The conductive bracket 2, with the deep ultraviolet LED chip 7 mounted, passes through the lamp housing tube 9 and into the lamp housing 1. The sealing plate 27 contacts the lamp housing tube 9, which is made of quartz. Flame sintering bonds the lamp housing tube 9 and the sealing plate 27 together to form a single, integrated structure.

[0048] In this embodiment, the upper shell 5 and the lower shell 15 are both made of high-temperature resistant, UV-resistant and highly reflective resin materials, and are molded into an integral body using a suspended resin through a molding machine to ensure that the upper shell 5 and the lower shell 15 have a long service life.

[0049] In this embodiment, the two electrode wires 24 are respectively passed through an insulating tube 28 and then welded to the positive and negative electrodes of the power board 10 , using metal tin wire.

[0050] In this embodiment, the conductive circuit 8 includes multiple copper sheets 29 that match the square slots 14. The copper sheets 29 are formed using a die punch. Each adjacent end of two adjacent copper sheets 29 is provided with a solder post fixing hole 30. The two solder post fixing holes 30 correspond to two solder posts 18, respectively. The solder posts 18 and copper sheets 29 are connected by metal solder. The copper sheets 29 are electroplated with a layer of nickel-gold.

[0051] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A deep ultraviolet LED germicidal bulb, characterized by: The lamp comprises a lamp housing, a conductive bracket, a stem and a lamp holder, wherein the conductive bracket is arranged in the inner cavity of the lamp housing, the conductive bracket comprises an upper shell, a top surface of the upper shell is provided with a plurality of light-emitting cups, each of the light-emitting cups is provided with a deep ultraviolet light-emitting diode chip, and each of the deep ultraviolet light-emitting diode chips is connected by a conductive circuit, a lamp housing tube communicating with the inner cavity of the lamp housing is provided on the lamp housing, the stem is sealed and connected in the lamp housing tube, the lamp holder is connected to the lamp housing tube, a power board is provided in the lamp holder, a connection point insulated from the lamp holder is provided on the top of the lamp holder, two ends of the conductive circuit are respectively connected to the positive and negative poles of the power board through the wires on the stem, and the lamp holder and the connection point are respectively connected to the two input lines of the power board; A T-shaped groove is provided on the bottom surface of the upper shell body, and a square groove is provided at the bottom of the T-shaped groove. The conductive circuit is installed in the square groove. A lower shell body matching the T-shaped groove is installed in the T-shaped groove. Two connecting holes connected to the square groove are provided on the bottom surface of each light output cup. Two soldering pads are provided in each light output cup. The two soldering pads are respectively connected to the two electrodes of the deep ultraviolet light-emitting diode chip. A soldering pad column is provided on the bottom surface of each soldering pad. The soldering pad columns on the bottom surfaces of the two soldering pads in one light output cup are respectively connected to the conductive circuit through the two connecting holes.

2. The deep ultraviolet LED germicidal bulb according to claim 1, characterized in that: A metal terminal is sleeved on both ends of the conductive bracket, and a rivet hole is provided on the metal terminal. Fixing holes corresponding to the rivet holes are provided at both ends of the upper shell, the conductive circuit and the lower shell. The conductive bracket is riveted to the metal terminal by passing a rivet through the rivet hole and the corresponding fixing hole.

3. The deep ultraviolet LED germicidal bulb according to claim 2, characterized in that: The conductive bracket is a spiral conductive bracket, and the spiral radius of the conductive bracket gradually increases from the top to the bottom; the conductive wire includes two nickel wires and electrode wires respectively connected to the two nickel wires, the two nickel wires are respectively welded to the two metal terminals, and the two electrode wires are respectively connected to the positive and negative poles of the power board.

4. The deep ultraviolet LED germicidal bulb according to claim 1, characterized in that: The stem is provided with an exhaust pipe connected to the interior of the lamp housing tube. The exhaust pipe is used to extract the air in the lamp housing and the lamp housing tube and inject inert gas. After the inert gas is injected, the exhaust pipe is sealed.

5. The deep ultraviolet LED germicidal bulb according to claim 1, characterized in that: A lock is provided on the top of the lamp holder, the outer ring of the lock is made of insulating material, and the inner ring is made of metal material. The lock is connected to the lamp holder through the insulating material of its outer ring, and the connection point is located on the inner ring of the lock.

6. The deep ultraviolet LED germicidal bulb according to claim 1, characterized in that: A sealing plate is provided at the bottom end of the stem, and the port of the lamp housing tube is sealed and bonded to the sealing plate by flame sintering.

7. The deep ultraviolet LED germicidal bulb according to claim 1, characterized in that: The upper shell and the lower shell are both made of high-temperature resistant, UV-resistant and highly reflective resin materials, and are formed by integrally pressing with a molding machine using suspended resin.

8. The deep ultraviolet LED germicidal bulb according to claim 3, characterized in that: The two electrode wires are respectively passed through an insulating tube and then welded to the positive and negative electrodes of the power board.

9. The deep ultraviolet LED germicidal bulb according to claim 1, characterized in that: The conductive circuit includes multiple copper sheets that match the square grooves. The copper sheets are formed by a mold punch. Two adjacent copper sheets are each provided with a solder pad column fixing hole at one end close to each other. The two solder pad column fixing holes correspond to the two solder pad columns respectively, and the solder pad columns and the copper sheets are connected by welding with metal solder.

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