CN202454528U

CN202454528U - High-voltage discharge lamp with external bulb

Info

Publication number: CN202454528U
Application number: CN2010900006111U
Authority: CN
Inventors: 卢德格尔·维尔肯
Original assignee: Osram Co Ltd
Current assignee: Osram GmbH; Osram Co Ltd
Priority date: 2009-08-06
Filing date: 2010-07-22
Publication date: 2012-09-26
Anticipated expiration: 2020-07-22
Also published as: WO2011015456A3; DE112010000040A5; WO2011015456A2; WO2011015246A1

Abstract

A high-voltage discharge lamp with an external bulb is provided. In the lamp, an axis is defined, two end parts are provided, a ceramic discharge container, the end part of which is provided with a capillary, is obliquely arranged inside the external bulb, and the container is maintained through a support, the discharge container is filled with stuffing which comprises metal halide, the discharge container is slanted at least an angle alpha of 15 degrees in relative to the axis, and the angle is 75 degrees at most.

Description

The high-pressure discharge lamp that has external bulb

Technical field

The utility model relates to a kind of high-pressure discharge lamp, and it has ceramic discharge vessel (being also referred to as ceramic burner).Relate in particular to metal halide lamp at this.This high-pressure discharge lamp has metal halide fill; This high-pressure discharge lamp has integrated ballast or is not with integrated ballast; Wherein reduce in the lamp because the electrode that causes of rodent metal halide and the load of fused mass through in vertical lamp fired state, burner being mounted obliquely within, this makes longer service life.

Background technology

In fusion technology, burner is installed perpendicular to lamp axes ground in this type lamp usually.In the case, the cable that cable curves inwardly or laterally welding adds between electrode and burner that needs near (the fu β nahen) lower electrode of foot usually.

In JP-A 2005203309, proposed having filling with the minimal structure length in the lamp of the ceramic burner of metal halide.At this, be installed in the lamp to the burner slight inclination.Boundary condition is: be arranged so that in the distance between the stent electrode between stent electrode, not have electric arc, this can guarantee through the distance of about 5mm usually.In lamp form of implementation, through being placed with the angle tilt between 3 ° to 4 ° with respect to lamp axes, realizes by burner in the minimum range of the 5mm between the electrode according to JP-A 2005203309.

The utility model content

The task of the utility model is to propose a kind of lamp that has ceramic burner, and wherein the lamp life-span is long as far as possible and the lamp life-span is irrelevant with fired state as far as possible.

This task solves through the high-pressure discharge lamp that has external bulb as follows; This high-pressure discharge lamp defines axis, wherein has two ends, has ceramic discharge vessel capillaceous in the end and be arranged in the external bulb obliquely, and keep by support there; Wherein discharge vessel comprises filler; Filler comprises metal halide, and discharge vessel is with respect to the angle [alpha] of at least 15 ° of axis inclinations, and wherein this angle is at most 75 °.In particularly advantageous expansion scheme, above-mentioned angle can be 20 ° to 30 °; Discharge vessel can have the end of electrode and rounding; External bulb can have the innerland to be shaped, and especially ellipse perhaps is shaped spherically; External bulb can apply with scattering layer; External bulb can be by foot's fused mass sealing near lamp holder; Can be towards lamp holder at the sheet of settling the light reflection that discharge vessel is launched under the discharge vessel on this direction.

Test shows: the useful life of lamp that has ceramic burner and metal halide fill usually is relevant with fired state.In the horizontal firing state, useful life is obviously longer, is almost the twice under the situation of vertical combustion state usually.

According to the utility model, a kind of lamp that especially has metal halide fill is provided, it has long as far as possible useful life in vertical lamp fired state, and this realizes through burner is placed in the lamp with respect to lamp axes obliquely.At this, the inclination angle is chosen as and makes metal halide in the state of heat, not touch the electrode in the burner.What especially in having discharge lamp capillaceous, additionally be suitable for is that metal halide should not infiltrate in the capillary.This is also avoided through making discharge vessel suitably tilt to place.To this required at the angular range between lamp axes and the burner in 15 ° to 80 ° scope.Preferably 20 ° to 50 ° scope.

Through constituting and what have that the burner of metal halide fill realizes is in the vertical combustion state, (especially to be applied under the situation of road lighting) metal halide general not touch electrode and do not infiltrate capillary by pottery.The result is, especially fused mass less receives the corrosiveness of metal halide thus, has obviously prolonged useful life thus.

Tilted-putted best angle depends on the version of burner.Under the situation of cylindrical burner, especially burner can be realized this purpose with respect to little being obliquely installed of lamp axes under 15 ° to 25 ° angle.Under the situation of the burner of sphere or rounding, bigger angle is favourable.This angle is in 20 ° to 70 ° scope.The maximum angle that can be provided with is confirmed through the diameter of external bulb in melt region, the length and the supporting structure of burner.

To a concrete applying examples, the burner of 100W can be installed on about 20 ° to 30 ° angle with respect to lamp axes has about 26mm in the external bulb of the minimum diameter in melt region of 34mm.Considering under the situation of tolerance that angular range can be between 20 ° to 35 ° with regard to this example application.

The burner with metal halide fill that is made up of pottery has following characteristic usually: two distance between electrodes that make up electric arc betwixt are relatively little.Therefore, electrical discharge arc is shorter.The electric orphan that discharges is generally 3mm to 15mm, makes it can be similar to that to be regarded as be point-like.Thus, burner itself has almost and the irrelevant emission characteristic of angle.Especially through burner almost spherical or that be provided with the bight of rounding at least (as its from US 5936351 known and constitute by translucent pottery), compensated again because the little asymmetry that melt region forms.In addition, if use that heave, especially oval-shaped or spherical, as to have scattering layer (especially constituting) external bulb by silica gel, Sipernat or translucent white paint, then light fixture have uniformly, almost with the irrelevant emission characteristic of angle.In addition, this scattering layer has following advantage, and the burner of inclination is directly not visible.

Preferably; In lamp, additionally can also use the sheet that constitutes by mica or metal (for example aluminium); Realized thus and will reflect on this sheet towards the light of fusing department or lamp holder emission, thus with respect to not realized increase light output with the lamp of this sheet through the inclination placement of burner.

Description of drawings

Fig. 1 shows the lamp with the fusion technology manufacturing that has the burner that tilts to install.

Fig. 2 shows the comparison of endurance life characteristic of the metal halide lamp of the different orientation with burner.

Embodiment

Fig. 1 shows the high-pressure discharge lamp 1 that has ceramic discharge vessel 2 and lamp axes A.Discharge vessel 2 is by Al ₂O ₃Constitute and have the end 3 and the placement capillary 4 on it of rounding, as itself is known.Discharge vessel is with the metal halide filling and comprise two electrodes.Discharge vessel 2 remains on two support retainers, promptly short retainer 13, the retainer 14 that its end is outward-dipping and long with respect to axis A.Two

retainers

13,14 are fixed on foot's fused mass 5, and it seals external bulb 6.External bulb 6 has the innerland to be shaped, and especially is shaped at this roughly spherically.The inboard of external bulb 6 applies with scattering layer 7.Long retainer 1 has: start-up portion 15, and it is outward-dipping with respect to axis A; The mid portion 16 and the free end 17 of straight longitudinal extension, it is crooked towards axis A again.

Discharge vessel 2 has prevented reliably thus that with respect to the angle of axis A tilt alpha=30 ° filling components such as Hg or metal halide from can deposit in the capillary 4 of bottom.Replace this, the storage tank of filler accumulates in the zone of end 3 of rounding.

External bulb 7 is arranged in lamp holder 8, as itself is known.Especially show lamp screw base at this.

The sheet 9 that is made up of mica or metal (especially aluminium) reflects by the light of discharge vessel towards lamp holder 8 emissions, and wherein this sheet is transverse to axis A.Lamp holder 8 can be included in EVG integrated in the housing 18, as itself is known.

In external bulb, advantageously include getter device 10.

This layout irrespectively shows uniform emission characteristics with fired state on the one hand.Shown that on the other hand lamp roughly reaches the useful life in the horizontal firing state useful life in the vertical combustion state.In the useful life of the lamp that the latter roughly installs corresponding to level, wherein burner axially is provided with.

Being implemented in by foot's 5 install combustion devices has enough positions to be used for tilt installing in the external bulb.Yet but in principle, external bulb also can seal with press section.

It should be noted that when mounted the neck 16 of external bulb is enough wide, so that can the installation unit that be made up of support and discharge vessel be introduced in the external bulb.

Fig. 2 shows the representational view of the characteristic in the useful life that is used for different lamps.Relate to the lamp of the 70W that has ceramic discharge vessel at this.At this, show useful life to following lamp: its discharge vessel or burner stand vertically, and have the make progress lamp holder of (fired state BU) and downward lamp holder (fired state BD) or rather.Stair-stepping curve is obtained by discrete inspection of lamp.With reference to the layout of lamp, its burner is horizontally disposed with (fired state HF) for this reason.It is desirable for orientation HF best result is provided, because capillary receives load minimum.

In Fig. 2, the M of family of curves representes the characteristic according to lamp of the present invention.At this, burner is with respect to tilt at least α=15 ° of this axis.This is actual inclination N under the situation of fired state BU or BD.Under the situation of fired state HF, so actual tilt N=90 °-α.

As shown in Figure 2, useful life and fired state irrespectively with in the optimal cases of fired state HF, compare significantly variation, but compare obviously better than the common desirable situation of fired state BU or BF.

List principal character of the present invention with numeral number:

1. 1 kinds of high-pressure discharge lamps that have external bulb of scheme, it defines axis, wherein has the ceramic discharge vessel of two ends; It has capillary in the end, is arranged in the external bulb obliquely, and keeps by support there; Wherein discharge vessel comprises filler, and filler comprises metal halide, it is characterized in that; Discharge vessel is with respect to the angle [alpha] of at least 15 ° of axis inclinations, and wherein this angle is at most 75 °.

Scheme 2. is characterized in that according to scheme 1 described high-pressure discharge lamp angle is 20 ° to 30 °.

Scheme 3. is characterized in that according to scheme 1 described high-pressure discharge lamp discharge vessel has the end of electrode and rounding.

Scheme 4. is characterized in that according to scheme 1 described high-pressure discharge lamp external bulb has the innerland to be shaped, and especially ellipse perhaps is shaped spherically.

Scheme 5. is characterized in that according to scheme 1 described high-pressure discharge lamp external bulb applies with scattering layer.

Scheme 6. is characterized in that according to scheme 1 described high-pressure discharge lamp external bulb seals by foot's fused mass near lamp holder.

Scheme 7. is characterized in that according to scheme 1 described high-pressure discharge lamp, is settling the sheet that will reflect from the light that discharge vessel is launched under the discharge vessel towards lamp holder on this direction.

Claims

1. high-pressure discharge lamp that has external bulb, it defines axis, wherein has two ends, has ceramic discharge vessel capillaceous in the end and be arranged in the external bulb obliquely; And keep by support there; Wherein discharge vessel comprises filler, and filler comprises metal halide, it is characterized in that; Discharge vessel is with respect to the angle [alpha] of at least 15 ° of axis inclinations, and wherein this angle is at most 75 °.

2. high-pressure discharge lamp according to claim 1 is characterized in that, angle is 20 ° to 30 °.

3. high-pressure discharge lamp according to claim 1 is characterized in that discharge vessel has the end of electrode and rounding.

4. high-pressure discharge lamp according to claim 1 is characterized in that, external bulb has the innerland to be shaped.

5. high-pressure discharge lamp according to claim 4 is characterized in that, external bulb is oval perhaps to be shaped spherically.

6. high-pressure discharge lamp according to claim 1 is characterized in that external bulb applies with scattering layer.

7. high-pressure discharge lamp according to claim 1 is characterized in that, external bulb seals by foot's fused mass near lamp holder.

8. high-pressure discharge lamp according to claim 1 is characterized in that, the sheet that the light of in arrangement under the discharge vessel discharge vessel being launched on this direction towards lamp holder reflects.