WO2005088676A1 - An improved electromagnetic inductive lamp - Google Patents

Abstract

The invention discloses an improved electromagnetic inductive lamp, which includes a lampholder mounded to a lamp socket; a case for control circuit covered by the lampholder, in which a control circuit is located; a lamp tube connected to the case for control circuit and coated with a fluorescent layer on its inner wall, inside which a gas and an amalgam are contained; a magnetic hoop surrounded the lamp tube and enclosed one cross section of the lamp tube; a magnetic ring located within the magnetic hoop and also enclosed the said cross section of the lamp tube; a coil wounded the magnetic ring and connected with the control circuit, which provides a magnetic field to lighten the electromagnetic inductive lamp. The electromagnetic inductive lamp only uses one magnetic hoop which encloses one cross section of the lamp tube, and the exhaust pipe of the lamp tube is located inside the lamp tube, so it can solve fragileness of the exhaust pipe and reduce the whole volume of the lamp. Further than that, the positive column in the bottom of the lamp tube also has an expansive sectional area to control optimum operating temperature of the plasma, so it can effectively reduce ionizing loss of discharge, and more particularly, solve radial corona of hydrargyrum during discharge.

Description

 TECHNICAL FIELD

 The present invention relates to an electromagnetic induction lamp, and more particularly, to an electromagnetic induction lamp with an improved structure, which improves the structure of a lamp tube and a magnetic hoop of the electromagnetic induction lamp. Background technique

 Electromagnetic induction lamp is a new generation energy-saving product with no filament, high luminous efficiency, high luminous flux, long life and high power factor. It can be widely used in homes, factories, office places, roads, engineering construction sites, etc.

 In 1991, Panasonic Corporation of Japan invented the Everlight induction lamp, GE produced the Genura lamp in 1994, and Philips developed the QL induction lamp in 1997. Their principle is to use electromagnetic induction to convert electrical energy They generate magnetic energy and emit light by converting magnetic energy into light energy. Therefore, they are all electromagnetic induction lamps. Their shapes and structures are also roughly the same. As shown in FIG. 1, the lamp 100 includes:

 The lamp holder 102 can be connected to the lamp holder. The housing 104 is connected to the lamp holder 102 and has a cavity therein. The electromagnetic induction lamp circuit is placed in the cavity of the casing 104. The lamp tube 106 has a spherical shape, and is fixed on the outer shell 104. Inside, there is a radon gas 108 and an amalgam 108 for maintaining discharge. The glass cavity 110 containing the coil is fixed on the casing 104 and extends into the interior of the lamp tube 106. An exhaust hole 112 is provided at one end. A conductive glass material 114 is connected to the RF ground portion, and the lamp tube 106 and the RF ground portion are connected. The phosphor coating 116 covers the inside of the lamp tube 106, the outside of the glass cavity 110, and the portion where the lamp tube 106 and the conductive glass material 114 are connected. The titanium dioxide reflective coating 118 covers the outside of the glass cavity 110 and the portion where the lamp tube 106 and the conductive glass material 114 are connected. The conductive coating 120 covers the outside of the lamp tube 106. The wire coil placed in the glass cavity 110 during the operation of this kind of lamp will generate a magnetic field. The magnetic field drives the gas ionization discharge in the lamp tube to generate light. Although these lamps have the advantages of electrodeless lamps, they also achieve miniaturization. It directly replaces the incandescent lamp, but its cost is higher, the process is complicated, and the production is difficult. And it is limited to low-power induction lamps.

 When the lamp is operating, the coil placed in the glass cavity 110 will generate a magnetic field, which drives the gas in the lamp tube.

-1-Confirm this Bulk ionization discharge generates light. Although these lamps have the advantages of induction lamps, they have also achieved miniaturization, and can directly replace incandescent lamps, but their cost is high, the process is complicated, and the production is difficult. And it is limited to low-power induction lamps.

 Patent US 2003011322 discloses an improved electromagnetic induction lamp, which separates the circuit from the lamp tube. In this way, when the lamp tube is damaged, only the lamp tube can be replaced, which can greatly save costs. However, the lamp tube of the electromagnetic induction lamp disclosed in the patent must have two magnetic rings on the lamp tube. Since the magnetic ring must be connected to the control circuit to work, the two magnetic rings increase the connection to a certain extent The complexity of the circuit, therefore, in applications with special requirements, the scope of application of this lamp is limited. At the same time, the lamp tube of the lamp tube protrudes from the outside of the lamp tube. As the exhaust tube is broken and damaged, the lamp tube will be scrapped. Therefore, when using this kind of lamp tube, it is necessary to pay attention to the position of the exhaust tube. Limit the scope of use of this lamp.

 At the same time, in the current technical solutions, there is a problem that the luminous amount of the electromagnetic induction lamp is insufficient. Sometimes, in order to achieve a high luminous amount, it can only be achieved by a relatively large discharge current, which will affect the wall of the tube. It causes a relatively large burden, and at the same time, it will accelerate the aging of the phosphor, and shorten the service life of the lamp. Therefore, there is a need in the art for how to improve the luminous efficiency of electromagnetic induction lamps. Summary of the invention

 The object of the present invention is to provide an electromagnetic induction lamp with an improved structure, which improves the structure of the lamp tube and the magnetic hoop, so that it can have a larger scope of application and safety in use, and can also improve the light emission of the electromagnetic induction lamp. effectiveness.

 To achieve the above objective, the present invention adopts the following technical solutions:

An electromagnetic induction lamp with an improved structure includes: a lamp cap, which can be mounted on a lamp holder; a control circuit shell connected to the lamp cap, the lamp cap being sleeved on the control circuit shell, and inside the control circuit shell A control circuit is placed; a lamp tube is connected to the control circuit housing, the inner wall of the lamp tube is coated with a phosphor layer, and the cavity of the lamp tube contains gas and amalgam; a magnetic hoop is sleeved on the lamp tube Surrounding a section of the lamp tube; a magnetic ring placed in the magnetic ring hoop, the magnetic ring also surrounding the section of the lamp tube; a coil wound around the magnetic ring, and The control circuit is connected to provide a magnetic field to light the electromagnetic induction lamp; wherein the electromagnetic induction lamp uses only one of the magnetic ring hoop which surrounds a certain section of the lamp tube; the exhaust pipe of the lamp tube is Placed inside the tube. According to an embodiment of the present invention, the lamp further includes a clamping plate, the clamping plate is connected to the control circuit housing; the lamp tube is not connected to the control circuit housing, but is connected to the clamping plate; the magnetic The hoop is connected to the splint.

 According to an embodiment of the present invention, a mercury-fixing and indium mesh is placed in an exhaust pipe of the lamp tube. The lamp also has one or more ports on which an indium mesh is placed.

 According to an embodiment of the present invention, the lamp tube has a closed three-dimensional shape. And the positive column area at the bottom end of the lamp tube has an enlarged cross-sectional area. For example, the lamp tube is a "U" shape, a bridge is formed in the "U" shape opening, the magnetic ring hoop and the magnetic ring are sleeved on the bridge, and the bottom end of the lamp tube is enlarged into a mushroom shape. Alternatively, the lamp tube has a “Π” shape, and the bottom end is enlarged into a mushroom shape.

 Because the above technical solution is adopted, the electromagnetic induction lamp of the present invention puts the exhaust pipe inside the lamp tube, so that it no longer protrudes out of the lamp tube, reduces the possibility of damage to the exhaust pipe, and also makes the lamp's Start-up and work are less affected by external temperature. At the same time, the electromagnetic induction lamp uses only one magnetic hoop, which can further reduce the size of the entire lamp. The indium mesh is used as an auxiliary start, so that the lamp can reach the rated luminous flux instantly after starting. The invention also controls the optimal temperature of the plasma by appropriately expanding the cross-sectional area of the discharge, which can effectively reduce the ionization loss of the discharge. The more important thing is to solve the problem of radial corona in the discharge. Because the occurrence of corona depends on the concentration of electrons, reducing the concentration of electrons can suppress the corona discharge, make the performance of the lamp more stable, and reduce the energy of high-energy electrons. Attrition. BRIEF DESCRIPTION OF THE DRAWINGS

 The features, nature, and advantages of the present invention will become more apparent after the following description in conjunction with the embodiments and the accompanying drawings. In the drawings, the same reference numerals indicate the same features, wherein:

1 is a structural diagram of a conventional electromagnetic induction lamp structure and a lamp tube; FIGS. 3A and 3B are structural diagrams of a lamp tube of an electromagnetic induction lamp according to an embodiment of the present invention; detailed description The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

 2A and 2B are structural diagrams according to an embodiment of the present invention, and 2A and 2B are views in two different directions, respectively. As shown in FIG. 2, the electromagnetic induction lamp 200 of this embodiment includes the following structure: a lamp holder 202, and the lamp holder 202 may be mounted on a lamp holder. The structure of the lamp holder 202 is the same as that in the conventional technology, and the structure of the lamp holder is also the same. The control circuit housing 204 is connected to the lamp holder 202, and the lamp holder 202 is sleeved on the control circuit housing 204. The control circuit housing 204 houses a control circuit 206 therein. The inner wall of the lamp tube 208 is coated with a phosphor layer, and the cavity of the lamp tube contains gas and amalgam (this will be described in detail in the description in conjunction with FIG. 3). The magnetic hoop 210 is sleeved on the lamp tube 208 and surrounds a certain section of the lamp tube 208. There is a magnetic ring 212 in the magnetic ring hoop 210, and the magnetic ring 212 also surrounds the above-mentioned section of the lamp tube 208. Referring to the embodiment shown in FIG. 2, the shape of the lamp tube here is “U”, and there is a bridge in the “U” opening (the lamp tube will be described in detail later with reference to FIG. 3). The magnetic hoop 210 is located at the bridge and surrounds a section on the bridge. A coil 214 is wound on the magnetic ring 212, and the coil 214 is connected to the control circuit 206 and provides a magnetic field to light the electromagnetic induction lamp 200. An improvement of the present invention lies in the number of the magnetic hoop 210. According to the technical solution of the present invention, it uses only one magnetic hoop 210, and as shown in FIG. 2, when this "U" type with a bridge is used When the lamp tube is used, the position of the magnetic hoop 210 is located in an empty crotch in the middle of the lamp tube, which does not need to occupy additional space, so the overall volume of the lamp tube can be reduced. This embodiment also includes a clamping plate 216. In this way, the lamp tube 208 and the magnetic hoop 210 are not directly connected to the control circuit housing 204, but are connected to the clamping plate 216, and the clamping plate 216 is connected to the control circuit housing 204. In FIG. 2B, a part of the lamp tube 208 and the connection of the magnetic hoop 210 and the clamp plate 216 are drawn in a sectional view. In this embodiment, the connection is made by screws.

3A and 3B are structural views of a lamp tube according to an embodiment of the present invention, which are also views from two directions. As shown in FIG. 3, the shape of the lamp tube 300 in this embodiment is a “U” type lamp tube, and a bridge 302 is formed in the “U” opening. The magnetic ring hoop 210 in this embodiment is sleeved on the bridge 302. . It should be noted that the present invention does not limit the shape of the lamp tube. Any shape of the lamp tube capable of forming a closed shape can be used, and the position of the magnetic hoop 210 is not fixed, as long as it can surround the lamp tube. One section is sufficient. It is easy to think that when the lamp tube is redesigned to have a relatively thin portion, it is advantageous to install a smaller magnetic ring hoop, which can reduce the overall volume of the lamp. Although the shape of the lamp tube shown here is a better choice, it does not mean that the scope of the present invention is limited to the shape disclosed herein. For the lamp tube, the present invention also has an improvement, that is, the exhaust pipe is placed inside the lamp tube. As shown in FIG. 3, at one end of the "U" shape, there is an exhaust pipe 304 that is recessed downward. Compared with the prior art (refer to FIG. 1), the exhaust pipe 304 in the lamp tube of the present invention It no longer protrudes from the outside of the lamp, which greatly reduces the possibility of damage to the exhaust pipe of the lamp. At the same time, in addition to placing solid mercury 306 in the exhaust pipe 304, an indium mesh 308 is also added. The indium mesh 308 can reduce the influence of the lamp's startup and operation on the external temperature, and the lamp reaches the rated instantaneously after the lamp is started. Luminous flux and full power state. In order to make the lamp work better, one or more ports with an indium mesh 308 can be provided in the lamp tube. For example, in this embodiment, the other end 310 of the "U" tube is provided with one There are ports for indium mesh 308. The inner wall of the lamp tube 300 is coated with a phosphor layer 312, and the cavity of the lamp tube contains a gas and an amalgam 314, which is the same as the lamp tube in the prior art. FIG. 3B illustrates the structure of the lamp tube 300 from the side, and its connection with the magnetic hoop 210 has been described previously, and will not be repeated here.

 After the above technical solution is adopted, the exhaust pipe of the lamp tube is transferred from the outside of the original lamp tube to the inside of the lamp tube, which fundamentally solves the problem of the exhaust pipe breaking due to improper operation and handling during the production process, and reduces Consumption in the production process, reducing production costs. At the same time, the design of the luminaire can avoid the difficulty of avoiding the exhaust pipe. It also makes the starting and working of the lamp less affected by the external temperature. At the same time, it only uses a magnetic ring. Compared with the traditional electromagnetic induction lamp, the electromagnetic induction lamp can be applied to various small spaces, making the electromagnetic induction lamp truly Moving towards miniaturization, replacing current energy-saving lamps. Indium mesh is used as an auxiliary start, so that the lamp can reach the rated luminous flux instantly after starting.

 The following describes another aspect of the present invention with reference to FIG. 4, that is, how to improve the light emitting efficiency of the electromagnetic induction lamp.

 For an electromagnetic induction lamp, the relationship between the discharge current and the electric field is as follows. In the positive column area, the relationship between the discharge current and the electric field is:

I = 2TLE ^ a _e (r) rdr where R is the diameter of the discharge tube and σ _β is the electrical conductivity of the positive column plasma, which can be approximated as follows:

It can be known from the formula that increasing the cross-sectional area of the discharge circuit can effectively reduce the current and electrical conductivity. This can effectively reduce the gas within the lamp Hg ₂ ⁺ complex decomposition temperature phenomenon occurs because:

Hg + e → Hg * + Hg Therefore, appropriately expanding the cross-sectional area of the discharge to control the optimal temperature of the plasma operation can effectively reduce the ionization loss of the discharge. The more important thing is to solve the problem of radial corona in the discharge. Because the occurrence of corona depends on the concentration of electrons, reducing the concentration of electrons can suppress the corona discharge, make the performance of the lamp more stable, and reduce the energy of high-energy electrons. Attrition. Composition. As shown in FIG. 4, the electromagnetic induction lamp includes: a lamp holder 402, and the lamp holder 402 can be mounted on a lamp holder. The structure of the lamp holder 402 is the same as that in the conventional technology, and the structure of the lamp holder is also the same. The control circuit housing 404 is connected to the lamp holder 402, and the lamp holder 402 is sleeved on the control circuit housing 404. The control circuit housing 404 houses a control circuit 406 therein. The control circuit housing is connected to the lamp cover 405, which is connected to the lamp tube 408. The inner wall of the lamp tube 408 is coated with a phosphor layer 407. The cavity of the lamp tube contains gas and amalgam, and the gas is an inert gas 409. The magnetic ring hoop 410 is sleeved on the lamp tube 408 and surrounds a section of the lamp tube 408. The magnetic ring hoop 410 is fixed on the lamp cover 405 by screws 411. There is a magnetic ring 412 in the magnetic ring hoop 410, and the magnetic ring 412 also surrounds the above-mentioned section of the lamp tube 408. In this embodiment, the shape of the lamp tube is "U", and there is a bridge in the "U" opening. The magnetic hoop 410 is located at the bridge and surrounds a section on the bridge. A coil 414 is wound on the magnetic ring 412, and the coil 414 is connected to the control circuit 406 to provide a magnetic field to light the electromagnetic induction lamp 400. Referring to the partial cross-sectional structure in FIGS. 4A and 4B, it can be seen that two top ends of the lamp tube 408 are each provided with a built-in exhaust pipe 416, and the mercury pipe 418 and the indium mesh 20 are placed in the exhaust pipe 416. It should be noted that the exhaust pipe 416 of the lamp tube 408 shown in this embodiment is placed inside the lamp tube, which is more conducive to the safe use of the lamp tube. Mercury and indium mesh are placed in the exhaust pipe. In addition, the lamp The tube 408 also has one or more other ports on which an indium mesh is placed, such as another port of the "U" type. Although this port is not cut out in Figs. 4A and 4B, those skilled in the art can understand its structure. . The biggest improvement in the embodiment shown in Figs. 4A and 4B is the shape of the lamp tube 408, which is the shape of its bottom end. Although the lamp tube 408 in this embodiment is also "U" shaped, the bottom end is enlarged to show Mushroom type, which is obvious from the side view structure in FIG. 4B. The lamp tube 408 in this shape enlarges the cross-sectional area of the positive column region, can better control the optimal temperature of the plasma operation, and can effectively reduce the ionization loss of the discharge. The more important thing is to solve the problem of radial corona in the discharge. Because the occurrence of corona depends on the concentration of electrons, reducing the concentration of electrons can suppress the corona discharge, make the performance of the lamp more stable, and reduce the energy of high-energy electrons. Attrition. In addition to the shape of the lamp tube shown in FIGS. 4A and 4B, the lamp tube can also have a "Π" shape, and the bottom end is also enlarged into a mushroom shape. Alternatively, the lamp tube may be of a hemispherical shape with a larger diameter at the bottom end. It should be noted that other shapes, as long as they meet the criterion of expanding the cross-sectional area of the columnar area, should be regarded as within the scope of the present invention.

 By adopting the above technical solution, by appropriately expanding the cross-sectional area of the discharge to control the optimal temperature of the plasma operation, the ionization loss of the discharge can be effectively reduced. The main thing is to solve the problem of radial corona of mercury in discharge. Because the occurrence of corona depends on the concentration of electrons, low electron concentration can suppress corona discharge, make the performance of the lamp more stable, and reduce the energy of high-energy electrons. Attrition.

 In summary, the electromagnetic induction lamp of the present invention puts the exhaust pipe inside the lamp tube, so that it no longer protrudes out of the lamp tube, reduces the possibility of damage to the exhaust pipe, and enables the lamp to start and work. Affected by the external temperature, the electromagnetic induction lamp uses only one magnetic ring hoop, which can further reduce the volume of the entire lamp. The indium mesh is used as an auxiliary start, so that the lamp can reach the rated luminous flux instantly after starting. The invention also controls the optimal temperature of the plasma operation by appropriately expanding the cross-sectional area of the discharge, which can effectively reduce the ionization loss of the discharge. The more important thing is to solve the problem of radial corona in the discharge. Because the occurrence of corona depends on the concentration of electrons, reducing the concentration of electrons can suppress the corona discharge, make the performance of the lamp more stable, and reduce the energy of high energy electrons. Attrition.

 The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. The protection scope of the present invention is not limited by the above-mentioned embodiments, but should be the maximum scope consistent with the innovative features mentioned in the claims.

Claims

Rights request 1. An electromagnetic induction lamp having an improved structure, comprising  Lamp holder, the lamp holder can be installed on the lamp holder;  A control circuit housing is connected to the lamp cap, the lamp cap is sleeved on the control circuit shell, and a control circuit is placed in the control circuit shell;  A lamp tube connected to the control circuit housing, the inner wall of the lamp tube is coated with a phosphor powder layer, and the cavity of the lamp tube contains gas and amalgam;  A magnetic hoop is sleeved on the lamp tube and surrounds a certain section of the lamp tube;  A magnetic ring is placed in the magnetic ring hoop, and the magnetic ring also surrounds the cross section of the lamp tube; a coil is wound around the magnetic ring and is connected to the control circuit to provide a magnetic field to light up Electromagnetic induction lamp  It is characterized by,  Using only one said magnetic hoop, which surrounds a certain section of the lamp tube;  The exhaust pipe of the lamp tube is placed inside the lamp tube. 2. The electromagnetic induction lamp according to claim 1, further comprising a clamping plate, the clamping plate being connected to the control circuit housing; the lamp tube is not connected to the control circuit housing, but is connected to The clamping plate; the magnetic ring hoop is connected to the clamping plate. 3. The electromagnetic induction lamp according to claim 1, wherein a mercury-fixing and indium mesh is placed in an exhaust pipe of the lamp tube. 4. The electromagnetic induction lamp according to claim 3, wherein the lamp tube further has one or more ports on which an indium mesh is placed. 5. The electromagnetic induction lamp according to any one of claims 1-4, wherein the lamp tube is a closed three-dimensional shape. 6. The electromagnetic induction lamp according to claim 5, wherein a pillar region at a bottom end of the lamp tube has an enlarged cross-sectional area. 7. The electromagnetic induction lamp according to claim 6, wherein the lamp tube is a "U" type, and a bridge is formed in the "U" type opening, and the magnetic ring hoop and the magnetic ring are sleeved on the On the bridge, the bottom end of the lamp tube is enlarged into a mushroom shape. 8. The electromagnetic induction lamp according to claim 6, wherein the lamp tube has a "Π" shape, and the bottom end is enlarged into a mushroom shape.