CN1082768A

CN1082768A - Electroless low-pressure discharge lamp

Info

Publication number: CN1082768A
Application number: CN93108041A
Authority: CN
Inventors: P·H·安东尼斯; H·J·艾金克; W·H·A·M·弗里德里希斯
Original assignee: Philips Electronics NV
Current assignee: Koninklijke Philips NV
Priority date: 1992-07-03
Filing date: 1993-06-30
Publication date: 1994-02-23
Anticipated expiration: 2013-06-30
Also published as: DE69313537T2; JP3790554B2; JPH06196006A; CN1051874C; DE69313537D1; KR940003422A; KR100275355B1

Abstract

Electroless low-pressure discharge lamp has a lamp chamber (1), it and expansion mouth (6) welding that extends to the flared tube (5) in the lamp chamber.An energy coupler (20) removably be fixed on the lamp chamber and comprise one by electric coil (22) around soft magnetism fuse (21) and the heat-conduction component (23) in fuse.This element is a solid barred body, and coil (22) is that elastomeric material laterally is coupled barred body (23) in the zone (8) of close expansion mouth (6) of place's flared tube (5) with fuse (2).The structure of this lamp has avoided using the heat pipe as the costliness of heat-conduction component.

Description

Electroless low-pressure discharge lamp

The present invention relates to a kind of electroless low-pressure discharge lamp, it comprises: an electric light chamber of sealing in the vacuum tightness mode, and comprise a neck shape end, wherein the lamp chamber has a kind of ionization filler of being made up of inert gas, and have a pipe that extends into the lamp chamber in its end, comprise that also is fused to the flared part that the lamp chamber is connected with a column part again; One removably to the energy coupler that is fixed on the lamp chamber, this coupler comprises in this fluorescent tube: soft core of magnetic material, around an electric coil of this core, and in this core a heat-conduction component, this heat-conduction component extends to the outside of lamp chamber and has a flange there.

A kind of like this electroless low-pressure discharge lamp can be from patent EP 0,456, and 289-A1 and US recognize in 5,006,752.

In known lamp, this pipe runs through on the length in whole lamp chamber substantially.The coil of core is located on the zone of end of the pipe that places inside, lamp chamber.Therefore well with energy conduction in the filler of ionization.

Known lamp is the lamp of consumption rate higher-wattage type, and for example, about 80 to 90W, produces heat in lamp work, this heat should be excluded in case anti-core here stand near or even be higher than the temperature of its Curie point.This is because when temperature was elevated to Curie point, the magnetic loss rate increased consumingly, and magnetic permeability reduces.

Known lamp adopts a hollow tubing conductor that fills a kind of liquid as heat-conduction component to form the danger of having cleared up fuse overtemperature degree.This liquid evaporates in a zone of the conduit that is arranged in fuse, and in the zone of the outside in lamp chamber vapor condenses.This heat of condensation is delivered in the environment by flange and goes.When this zone is positioned at the top of flange, wire gauze is present in the hollow tubing conductor so that a capillary structure is provided, and its imbibition body that makes progress guarantees the zone of flow direction in core, and overcomes gravity.The known conduit that liquid and wire gauze are housed has a very high heat-transfer capability, causes this lamp may have the ability of the higher electric energy of energy consumption rate.

Yet a shortcoming of lamps known is this conduit is the assembly of a costliness.

The purpose of this invention is to provide the lamp of a type described in the beginning paragraph, it is simple in structure, has avoided the pipe that liquid and wire gauze are equipped with in essential use to be used as heat-conduction component therein.

According to the present invention, its objective is that by making coil be present in the zone of being in charge of near expansion mouth and making element be that a solid barred body and this barred body combine with core in the side by an elastic shape material and realize.

When coil and fuse only extend to the inside one small distance in lamp chamber in end, contiguous lamp chamber, find still to have obtained the efficient energy transmission.It is shorter that useful result is that heat is passed to the distance of outside.

Because the difference of the thermal coefficient of expansion between the material of the material of fuse and rod, the allowable deviation of the fragility of fuse and their sizes own and fuse and barred body are closely contacted is very difficult, for the heat conduction from the fuse to the barred body, it is useful that a smaller outer surface is only arranged, because the space of barred body seriously hinders heat conduction in fuse.This is a shortcoming, because compare with the pipe that liquid is housed, barred body has a smaller capacity of heat transmission.

Side-coupled between barred body and the fuse is by a kind of elastomeric material, iron for example, and Philips (Philips) 4C6 for example, thereby guarantee to provide a good heat conduction simultaneously to the compensation of dimensional tolerance and different thermal coefficient of expansion.

The layout of coil and use elastomeric material to make and use comparatively cheap solid bar to become possibility is for example made by the metal of copper and aluminium, perhaps thermal conductive ceramic material and so on, and as aluminium nitride, it has the thermal conductivity with the aluminium par.

According to the lamp with dismountable energy coupler of the present invention, making its change lamp chamber becomes possibility, for example, when the lamp chamber is broken or wished that one of use is different from original light color, and need not discard in these cases under the situation of whole lamp.This lamp can be worked several ten thousand hours really, and for example 60000 hours, and keep having good illumination efficiency.

In a preferred embodiment, this barred body has a flange, and for example by copper, aluminium, perhaps brass is made, for example CuZn ₁₅And has a narrow surface, for example coning towards the direction of rod.Flange has one towards the surface of leaving the barred body direction as a result, and it is the surface that contacts with the external world all the time.On the other hand, barred body and flange have a thermo-contact preferably, and if the lamp of the weight ratio flange of lamp when being the situation of slice of cylinder of an equal height want light.

By interface,, perhaps, rod and flange can be coupled together by around barred body hot pressing or clamping flange connector perhaps by using scolder, glue or adhesive respectively.Another may be with barred body precession flange, perhaps flange and rod is made an integral body.

In one embodiment, the length that extends to the pipe in the lamp chamber is identical with the length of lamps known, and promptly its length surpasses the length of the energy coupler of lamp according to the present invention.An advantage is, also can be used to have the lamps known of long energy coupler according to lamp of the present invention chamber.

Can use a kind of flexible polymer, for example, rubber, silicon rubber as elastomeric material in order to connect barred body and fuse.

The ionization filler can comprise for example mixture of argon, neon, xenon or rare gas, perhaps also has mercury.The lamp chamber can have a fluorescent coating, for example comprises under the situation of mercury at filler.

Shown in the side-looking sectional arrangement drawing according to the embodiment of a lamp of the present invention.

In the figure, electroless low-pressure discharge lamp has a lamp chamber 1, and this chamber is sealed with vacuum sealing mode, and comprises a neck shape end 2.In the figure, the lamp chamber has the filler of mercury and rare gas and the fluorescent material on inner surface 4.In the end 2 with the welding of lamp chamber be pipe 5, this pipe 5 stretches in the lamp chamber, and comprises and be fused on the lamp chamber and the expansion mouth 6 that is connected with column part 7.

Energy coupler 20 removably is fixed on the lamp container 1.Energy coupler has the fuse 21 of a soft magnetic material, an electric coil 22 and the heat conducting element 23 in fuse 21 around fuse 21 in pipe 5.This element extends to the outside of lamp container 1 and has a flange 24.

Coil 22 is in the zone 8 near the pipe 5 of expansion mouth 6, and element 23 is solid barred bodies, and barred body 23 is coupled by elastomeric material 25 side direction and fuse 21.The intervention of elastomeric material is for providing good heat conduction from the fuse to the barred body.

Flange 24 has a surface 27 of shrinking to barred body 23 directions.In the figure, flange 24 is to be made of copper and to make an integral body with barred body 23.Elastomeric material 25 is a silicon rubber in the figure.

Synthetic resin along 9 be by adhesive 10 be fixed on the lamp chamber neck shape portion 2 around.Flange 24 has hook 28, by this hook energy coupler 20 is detachably fixed on the lamp chamber 1.

Compare with energy coupler, pipe 5 has the length that exceeds.Shown lamp can consume for example 40 to 85W power surely with its size.

Claims

1, a kind of electroless low-pressure discharge lamp comprises:

A lamp chamber (1) of sealing in the mode of vacuum sealing and comprise a neck shape end (2); Wherein the lamp chamber has the ionization filler that comprises rare gas, and has a pipe (5) in its end (2), and this pipe extends into the lamp chamber and also comprises the expansion mouth (6) that is fused to the lamp chamber and is connected with columnar portion (7);

Be fixed to an energy coupler (20) in lamp chamber (1) with removably, in pipe (5), also comprise the fuse (21) of a soft magnetic material, a electric coil (22) around fuse (21), and in fuse (21) heat conducting element (23), this element extends to the outside in lamp chamber, and has a flange (24) there;

It is characterized in that:

Coil (22) is near in the zone (8) of expansion mouth pipe (5), and element (23) is a solid barred body, and this barred body (23) is by a kind of elastomeric material (25) side direction and fuse (21) coupling.

2, electroless low-pressure discharge lamp as claimed in claim 1 is characterized in that, flange (24) has an outer surface (27) that narrows down to barred body (23) direction.

3, electroless low-pressure discharge lamp as claimed in claim 2 is characterized in that flange (24) and barred body (23) are an integral body.

4, electroless low-pressure discharge lamp as claimed in claim 1 is characterized in that elastomeric material (25) is a silicon rubber.