CN201069766Y

CN201069766Y - High-frequency non electrode low-voltage light source

Info

Publication number: CN201069766Y
Application number: CNU2007201534251U
Authority: CN
Inventors: 任文华; 周国民
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-07
Filing date: 2007-06-07
Publication date: 2008-06-04
Anticipated expiration: 2017-06-07

Abstract

An electrodeless high-frequency low-voltage light source includes an electrodeless lamp which includes a lamp shell forming a closed loop, the lamp shell contains mercury and inert gas, a fluorescent coating is arranged on the inner surface of the lamp shell; a first transformer iron core and a second transformer magnetic core circle the lamp shell; an input winding is formed by serially connecting a common sensing winding, which is coiled on the first transformer iron core and the second transformer magnetic core, with two starting windings coiled on the lamp shell; the sensing winding is serially connected between the two starting windings; and a radiofrequency power supply is connected with the input winding for supplying radiofrequency energy. The utility model has simple structure and process, as well as good start-up performance.

Description

The high frequency electrode-free low-voltage light source

Technical field

The utility model relates to glow discharge spot lamp, particularly the high frequency electrode-free low-voltage light source of induction discharge.

Background technology

2003 U.S.'s patent on January 16, (US20030011322) a kind of high frequency electrode-free low-voltage light source is disclosed.This kind high frequency electrode-free low-voltage light source comprises: one constitutes the tubular lamp shell of closed-loop path; One is positioned over the metallic vapour in the described lamp housing; One is positioned over the inert gas that its interior air pressure of described lamp housing is higher than 0.5 torr; One protective layer and that is arranged at described lamp housing inner surface is arranged at the fluoresent coating on the described protective layer; One is arranged at the reflector on the tube connector zone; One has the circle or the induction winding of multi-turn, and its every circle winding has essentially identical length and diameter, and its winding is set directly on the outer surface of described tubular lamp shell and is parallel with tubular axis; At least one magnetic core of transformer is placed around described lamp housing, and described induction winding is by the position, hole of its magnetic core of transformer, so that the coupling of described induction winding to described lamp housing to be provided; One radio-frequency power supply is connected igniting and the high-frequency discharge so that gas in the described lamp housing to be provided with described induction winding.This kind high frequency electrode-free low-voltage light source, its manufacturing process are very complicated, and it is fixed in the propagation that induction winding on the lamp housing outer surface also will stop the light that sends in the lamp housing, and the such setting of its induction winding also has a strong impact on the attractive in appearance of its light source.

Summary of the invention

The purpose of this utility model is to provide a kind of structure and technology simple and have a high frequency electrode-free low-voltage light source than high starting performance.

In order to achieve the above object, the utility model adopts following technical scheme: the high frequency electrode-free low-voltage light source comprises:

Electrodeless lamp, it comprises the tubular lamp shell that constitutes the closed-loop path, and lamp housing contains mercury and inert gas, and the inner surface of lamp housing is provided with fluoresent coating;

First transformer core and second magnetic core of transformer are all placed around described lamp housing;

The input winding is formed by two startup windings in series that are wound in a public induction winding on described first transformer core and second magnetic core of transformer and be wound on the described lamp housing, and described induction winding is serially connected with described two and starts between the windings;

Radio-frequency power supply with the input winding is connected is used to provide radio-frequency (RF) energy.

Between described input winding and described radio-frequency power supply, can also set up two the startup windings in addition that are wound on the described lamp housing, they are connected between two outputs of two inputs of described input winding and described radio-frequency power supply, with its startup ability of further raising.

The number of turns of described induction winding between 50 circles, is usually located at 2 circles between 20 circles at 1 circle; Described each number of turns that starts winding is usually located at 2 circles between 8 circles between 1 circle encloses to 30; Described induction winding and startup winding adopt multi cord to come coiling usually.

The frequency of described radio-frequency power supply is between 50KHz to 3MHz, usually between 100KHz to 400KHz.

Described startup winding be wound in usually described first transformer core or second magnetic core of transformer around the lamp housing place, also can be wound in described first transformer core or second magnetic core of transformer around lamp housing near; Described two start windings can all be wound in described first transformer core around the lamp housing place or its near, also can make one of them start winding be wound in described first transformer core institute around the lamp housing place or its near, and another startup winding wherein be wound in described second transformer core around the lamp housing place or its near.

The tubular lamp shell of described formation closed-loop path comprises two parallel pipes, links to each other with the first side pipe near an end of two parallel pipes or its, near the other end of two parallel pipes or its, link to each other with the second side pipe, thus the formation closed-loop path.

The tubular lamp shell of described formation closed-loop path can be made of two straight tubes of two U type tubular lamp shells and two U type tubular lamp shells of connection, and two U type tubular lamp shells are not in the same plane, so that described electrodeless lamp just has three-dimensional contouring.

The aperture size of described lamp housing is usually between 10mm to 80mm.On described lamp housing, can be provided with and expose the less insede exhaust pipe of size, the better simply external blast pipe of manufacture craft also can be set.

Described mercury and inert gas.Its mercury can be liquid mercury, also can be solid-state mercury, and as amalgam, its amalgam can be arranged in the blast pipe; Its inert gas can be inert gas and their mixtures such as argon, krypton.

Described transformer core can adopt loop configuration, also can adopt other structure.The used material of its transformer core adopts Ferrite Material usually, can select MnZn ferrite material as required for use, also can select nickel-zinc-ferrite material for use; Its transformer core preferably is cut into two, and the position, hole of cutting its transformer core of back is opened wide, so that described lamp housing can conveniently be put into the Kong Weizhong of transformer core, each end of the transformer core that is cut open is ground smoothly.

The utlity model has following good effect:

The described device of United States Patent (USP) (US20030011322), its induction winding not only will be wound in the Kong Weizhong of a plurality of transformer cores, and the tubular axis that will make its induction winding be parallel to lamp housing places and is fixed on the lamp housing, and it is made with fixing very complicated and be arranged on the propagation that the induction winding that constitutes on the one all lamp housing outer surfaces of closed-loop path will seriously stop the light that is sent in the lamp housing.And induction winding of the present utility model is the Kong Weizhong that directly is wound in two transformer cores, and it is made with fixing very easy, has also significantly reduced stopping light; The utility model is directly reeled on described lamp housing and is started winding as auxiliary actuating apparatus in addition, and it is made simply, cost is low, but has very high startability.

Description of drawings

Fig. 1 is the schematic diagram of high frequency electrode-free low-voltage light source of the present utility model;

Fig. 2 has showed second embodiment of high frequency electrode-free low-voltage light source of the present utility model;

Fig. 3 has showed the 3rd embodiment of high frequency electrode-free low-voltage light source of the present utility model.

Fig. 4 has showed another embodiment of high frequency electrode-free low-voltage light source of the present utility model.

Embodiment

Fig. 1 is the schematic diagram of high frequency electrode-free low-voltage light source of the present utility model.The utility model comprises: electrodeless lamp, and it comprises the tubular lamp shell 1 that constitutes the closed-loop path, and lamp housing contains mercury and inert gas, and the inner surface of lamp housing is provided with fluoresent coating; First transformer core 2 and second magnetic core of transformer 3 are all placed around described lamp housing 1; The public induction winding 4 of on first transformer core 2 and second magnetic core of transformer 3, having reeled; 3 of second magnetic core of transformers around the lamp housing place be provided with two

startup windings

5,6 that directly are wound on the lamp housing; Constituted the input winding by induction winding 4 and two startup winding 5,6 series connection, wherein responded to winding and be serially connected with between two startup windings; Radio-frequency power supply 7 is electrically connected with the input winding.

When power connection, the output of radio-frequency power supply 7 provides the high pressure of a resonance, this high pressure is applied to two and starts on the winding 5,6 and near the very big electric field of space generation these two startup windings, these two gas ionizations that start near the lamp housing of winding are punctured, promptly cause the capacitive character generating, carry out the transition to inductively coupled discharge then.These two start winding as auxiliary actuating apparatus, and its manufacture craft is simple, with low cost.

Fig. 2 shows second embodiment of high frequency electrode-free low-voltage light source of the present utility model.This embodiment is similar to first embodiment shown in Figure 1, just two to start the set position of winding different.In the present embodiment, one of them start winding 5 be arranged on 2 of first magnetic core of transformers around the lamp housing place, another start winding 6 be arranged on 3 of second magnetic core of transformers around the lamp housing place.Two startup windings are set so also can make the clean boot of the utility model device.

Fig. 3 shows the 3rd embodiment of high frequency electrode-free low-voltage light source of the present utility model.In this embodiment, the lamp housing of described formation closed-loop path comprises two

parallel pipes

10,11, end at two parallel pipes links to each other with first side pipe 12, links to each other with second side pipe 13 in the other end of two parallel pipes, thereby constitutes the closed-loop path of discharging; The middle part of a parallel pipe 10 therein is provided with first transformer core 2 around this parallel pipe, and the middle part of another parallel pipe 11 therein is provided with second transformer core 3 around this parallel pipe; On first transformer core 2 and second magnetic core of transformer 3, be provided with a public induction winding 4; 3 of second magnetic core of transformers around the lamp housing place be provided with two

startup windings

5,6 that directly are wound on the lamp housing; Constituted the input winding by induction winding 4 and two startup winding 5,6 series connection, wherein responded to winding 4 and be serially connected with between two

startup windings

5,6; Radio-frequency power supply 7 is electrically connected with the input winding.

Fig. 4 shows another embodiment of high frequency electrode-free low-voltage light source of the present utility model.This embodiment is similar to embodiment shown in Figure 3, just 2 of first magnetic core of transformers around the lamp housing place set up two and started windings 8,9.These two start between two outputs that winding 8,9 is connected to two inputs of described input winding and described radio-frequency power supply 7.Set up the startup ability that winding can further improve its light source that starts.

Although showed and described and thought preferred embodiment of the present utility model at present, apparent, those skilled in the art can carry out various changes and improvements, and does not deviate from the scope of the present utility model that is limited by appended claims.

Claims

1. high frequency electrode-free low-voltage light source comprises:

Electrodeless lamp, it comprises the tubular lamp shell (1) that constitutes the closed-loop path, and lamp housing contains mercury and inert gas, and the inner surface of lamp housing is provided with fluoresent coating;

First transformer core (2) and second magnetic core of transformer (3) are all placed around described lamp housing;

The input winding;

Radio-frequency power supply (7) with the input winding is connected is used to provide radio-frequency (RF) energy;

It is characterized in that described input winding, be in series by two the startup windings (5,6) that are wound in a public induction winding (4) on described first transformer core and second magnetic core of transformer and be wound on the described lamp housing, described induction winding (4) is serially connected with described two and starts between the windings (5,6).

2. as high frequency electrode-free low-voltage light source that claim 1 limited, it is characterized in that, between described input winding and described radio-frequency power supply, also be provided be wound on the described lamp housing in addition two start windings (8,9), they are connected between two outputs of two inputs of described input winding and described radio-frequency power supply.

3. the high frequency electrode-free low-voltage light source that is limited as one of claim 1 or 2 is characterized in that, the number of turns of described each startup winding is between 1 circle encloses to 20.

4. the high frequency electrode-free low-voltage light source that is limited as one of claim 1 or 2 is characterized in that, the frequency of described radio-frequency power supply is between 50KHz to 3MHz.

5. as the high frequency electrode-free low-voltage light source that claim 1 limited, it is characterized in that, described two start windings all be wound in described first transformer core around the lamp housing place.

6. as the high frequency electrode-free low-voltage light source that claim 1 limited, it is characterized in that, described two start windings all be wound in described first transformer core around lamp housing near.

7. as high frequency electrode-free low-voltage light source that claim 1 limited, it is characterized in that, described two start windings one of them be wound in described first transformer core around the lamp housing place, wherein another be wound in described second transformer core around the lamp housing place.

8. as high frequency electrode-free low-voltage light source that claim 1 limited, it is characterized in that, described two start windings one of them be wound in described first transformer core around lamp housing near, wherein another be wound in described second transformer core around lamp housing near.

9. the high frequency electrode-free low-voltage light source that is limited as one of claim 1 or 2 is characterized in that, described transformer core has loop configuration.

10. the high frequency electrode-free low-voltage light source that is limited as one of claim 1 or 2, it is characterized in that, described lamp housing comprises two parallel pipes (10,11), end at two parallel pipes links to each other with first side pipe (12), the other end at two parallel pipes links to each other with second side pipe (13), thereby constitutes the closed-loop path.