EP0161028B1 - High-pressure discharge lamp - Google Patents

High-pressure discharge lamp Download PDF

Info

Publication number
EP0161028B1
EP0161028B1 EP85200632A EP85200632A EP0161028B1 EP 0161028 B1 EP0161028 B1 EP 0161028B1 EP 85200632 A EP85200632 A EP 85200632A EP 85200632 A EP85200632 A EP 85200632A EP 0161028 B1 EP0161028 B1 EP 0161028B1
Authority
EP
European Patent Office
Prior art keywords
lamp
intermediate piece
pressure discharge
lamp base
outer bulb
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85200632A
Other languages
German (de)
French (fr)
Other versions
EP0161028A2 (en
EP0161028A3 (en
Inventor
Ralf Dr. Schäfer
Hans-Peter Dr. Stormberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0161028A2 publication Critical patent/EP0161028A2/en
Publication of EP0161028A3 publication Critical patent/EP0161028A3/en
Application granted granted Critical
Publication of EP0161028B1 publication Critical patent/EP0161028B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr

Definitions

  • the invention relates to a high-pressure discharge lamp with a tubular, coaxial intermediate piece arranged between the outer bulb and the lamp base and made of poorly heat-conducting material, preferably of glass or quartz.
  • the lamp base can either consist only of the actual lamp base or of the base and an additional hollow body attached between the latter and the outer bulb. In the outer bulb, either the discharge can take place immediately or a separate discharge tube can be arranged.
  • the invention is therefore based on the object of creating a high-pressure discharge lamp with a poorly heat-conducting intermediate piece, which not only prevents the lamp base from overheating, but also does not significantly increase the overall dimensions of the lamp.
  • the axial cross section of the folding of the intermediate piece is preferably meandering.
  • the intermediate piece can also be designed as a corrugated tube. In both cases, the intermediate piece is mechanically particularly stable.
  • the discharge lamp has a discharge tube 1, which is accommodated by means of pole wires 2 and 3 in an outer bulb 4 made of glass, which is evacuated and which is filled with a gas.
  • the pole wires 2 and 3 are fastened to the wall of the outer bulb 4, fused-in electrical feedthroughs 5, which in turn are connected via leads 12 to a ballast or ignition electronics 6, which is located in a lamp base 7, which consists of a hollow body 8 and one thereon subsequent lamp base 9 there.
  • the hollow body 8 can be gas-filled or evacuated.
  • the outer bulb 4 is connected to the lamp base 7 by an intermediate piece 10 made of glass, which is folded up in a meandering shape.
  • the intermediate piece 10 thus has a relatively short overall length, but a great length for the heat conduction, so that it forms a considerable thermal resistance between the hot outer bulb 4 and the hollow body 8 containing the electronick 6. In this way, in the illustrated burning position of the lamp, overheating leading to the destruction or reduction of the life of the components in the electronics 6 is avoided. For this purpose, temperatures below 80 to 100 ° C. are generally desirable.
  • the intermediate piece 10 is connected to the outer bulb 4 and the hollow body 8, preferably by gluing.
  • a further reduction in the heat flow from the outer bulb 4 to the lamp base 7 can be achieved in that the intermediate piece 10 is not glued to the outer bulb or lamp base over the entire circumference of its end faces, but only over such a part of its end faces that is sufficient for mechanical mounting.
  • the lamp base 7 and the electronics 6 contained in it are heated not only by heat conduction from the outer bulb 4, but also by hot gas rising from the outer bulb.
  • an annular heat shield 11 which projects outward like a flange is placed on the outer bulb 4 at its end on the lamp base side.
  • This heat shield 11 can consist of glass and can be connected to the outer bulb 4 by gluing, cementing or fusing.

Description

Die Erfindung bezieht sich auf eine Hochdruckentladungslampe mit einem zwischen Außenkolben und Lampenfuß angeordneten rohrförmigen, koaxialen Zwischenstück aus schlecht wärmeleitendem Material, vorzugsweise aus Glas oder Quarz.The invention relates to a high-pressure discharge lamp with a tubular, coaxial intermediate piece arranged between the outer bulb and the lamp base and made of poorly heat-conducting material, preferably of glass or quartz.

Bei Hochdruckentladungslampen, z.B. bei Natrium- Quecksilber- oder Metallhalogenid-Hochdruckentladungslampen, besteht, insbesondere bei senkrechter Brennstellung mit nach oben weisendem Lampenfuß, das Problem der Überhitzung des Lampenfußes und eventuell in ihm enthaltener Teile. Dabei kann der Lampenfuß entweder nur aus dem eigentlichen Lampensokkel bestehen oder aus dem Sockel sowie einem zwischen diesem und dem Außenkolben angebrachten zusätzlichen Hohlkörper. Im Außenkolben kann entweder die Entladung unmittelbar stattfinden oder ein getrenntes Entladungsrohr angeordnet sein.With high pressure discharge lamps, e.g. with sodium mercury or metal halide high-pressure discharge lamps, there is the problem of overheating of the lamp base and any parts contained in it, especially in the vertical burning position with the lamp base pointing upwards. The lamp base can either consist only of the actual lamp base or of the base and an additional hollow body attached between the latter and the outer bulb. In the outer bulb, either the discharge can take place immediately or a separate discharge tube can be arranged.

Bei neueren Hochdruckentladungslampen ist es bekannt, ein elektronisches Vorschalt- oder Zündgerät im Lampenfuß unterzubringen (DE-OS 2939632). Obwohl hierbei der Lampensockel durch eine wärmedämmende Platte abgedeckt ist, steht er in unmittelbarem Wärmekontakt mit dem Außenkolben. Dadurch kann sich der Lampensockel auf mehr als 150°C erhitzen, was zu einer Zerstörung der im Lampensockel befindlichen elektronischen Bauelemente führen würde. Außerdem bedarf es in diesem Fall auch einer besonders hitzebeständigen Fassung.In newer high-pressure discharge lamps, it is known to accommodate an electronic ballast or igniter in the lamp base (DE-OS 2939632). Although the lamp base is covered by a heat-insulating plate, it is in direct thermal contact with the outer bulb. As a result, the lamp base can heat up to more than 150 ° C, which would lead to destruction of the electronic components located in the lamp base. In this case, a particularly heat-resistant frame is also required.

Aus der US-PS 2 103 028 ist eine Hochdruckentladungslampe bekannt, bei der zum Schutz des Lampensockels vor Wärmeleitung aus dem eigentlichen Lampenkolben zwischen diesem und dem Sockel ein zylindrisches Rohrstück aus Glas angeordnet ist, das aufgrund seiner geringen Wandstärke und großen Länge den Wärmetransport zum Sockel unterbinden soll. Derartige Zwischenstücke machen jedoch die ganze Lampe sehr lang und mechanisch unstabil.From US Pat. No. 2,103,028 a high-pressure discharge lamp is known, in which, to protect the lamp base from heat conduction from the actual lamp bulb, a cylindrical tube piece made of glass is arranged between it and, due to its small wall thickness and great length, the heat transport to the base prevent. However, such intermediate pieces make the whole lamp very long and mechanically unstable.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Hochdruckentladungslampe mit einem schlecht wärmeleitenden Zwischenstück zu schaffen, das nicht nur eine Überhitzung des Lampenfußses verhindet, sondern auch die Gestamtabmessungen der Lampe nicht wesentlich vergrößert.The invention is therefore based on the object of creating a high-pressure discharge lamp with a poorly heat-conducting intermediate piece, which not only prevents the lamp base from overheating, but also does not significantly increase the overall dimensions of the lamp.

Diese Aufgabe wird bei einer Hochdruckentladungslampe eingangs erwähnter Art gemäß der Erfindung dadurch gelöst, daß das Zwischenstück balgartig aufgefaltet ist. Auf diese Weise werden relativ kurze Zwischenstücke mit dennoch hohem Wärmewiderstand erhalten.This object is achieved in a high-pressure discharge lamp of the type mentioned at the outset in accordance with the invention in that the intermediate piece is folded out like a bellows. In this way, relatively short intermediate pieces with high thermal resistance are obtained.

Vorzugsweise ist der axiale Querschnitt der Faltung des Zwischenstückes mäanderförmig ausgebildet. Das Zwischenstück kann auch als Wellrohr ausgebildet sein. In beiden Fällen ist das Zwischenstück mechanisch besonders stabil.The axial cross section of the folding of the intermediate piece is preferably meandering. The intermediate piece can also be designed as a corrugated tube. In both cases, the intermediate piece is mechanically particularly stable.

Ein Ausführungsbeispiel nach der Erfindung wird nunmehr anhand der Zeichnung näher beschrieben. Diese zeigt einen Längsschnitt durch eine nicht maßstäblich dargestellte Hochdruckentladungslampe.An embodiment of the invention will now be described with reference to the drawing. This shows a longitudinal section through a high-pressure discharge lamp (not shown to scale).

Die Entladungslampe besitzt ein Entladungsrohr 1, das mit Hilfe von Poldrähten 2 und 3 in einem Außenkolben 4 aus Glas unterbracht ist, der evakuiert der mit einem Gas gefüllt ist. Die Poldrähte 2 und 3 sind an die Wandung des Außenkolbens 4 eingeschmolzenen elektrischen Durchführungen 5 befestigt, die wiederum über Zuleitungen 12 mit einer Vorschalt- oder Zündelektronik 6 verbunden sind, die sich in einem Lampenfuß 7 befindet, der aus einem Hohlkörper 8 und einem sich daran anschließenden Lampensockel 9 besteht. Der Hohlkörper 8 kann gasgefüllt oder evakuiert sein. Der Außenkolben 4 ist mit dem Lampenfuß 7 durch ein Zwischenstück 10 aus Glas verbunden, welches mäanderförmig aufgefaltet ist. Das Zwischenstück 10 besitzt dadurch eine relativ kurze Gesamtlänge, jedoch eine große Länge für die Wärmeleitung, so daß es einen erheblichen Wärmewiderstand zwischen dem heißen Außenkolben 4 und dem die Elektronick 6 enthaltenden Hohlkörper 8 bildet. Auf diese Weise wird bei der dargestellten Brennlage der Lampe eine zur Zerstörung oder zur Lebensdauerverminderung der Baulemente in der Elektronik 6 führende Überhitzung vermieden. Hierzu sind im allgemeinen Temperaturen unterhalb von 80 bis 100°C anzustreben.The discharge lamp has a discharge tube 1, which is accommodated by means of pole wires 2 and 3 in an outer bulb 4 made of glass, which is evacuated and which is filled with a gas. The pole wires 2 and 3 are fastened to the wall of the outer bulb 4, fused-in electrical feedthroughs 5, which in turn are connected via leads 12 to a ballast or ignition electronics 6, which is located in a lamp base 7, which consists of a hollow body 8 and one thereon subsequent lamp base 9 there. The hollow body 8 can be gas-filled or evacuated. The outer bulb 4 is connected to the lamp base 7 by an intermediate piece 10 made of glass, which is folded up in a meandering shape. The intermediate piece 10 thus has a relatively short overall length, but a great length for the heat conduction, so that it forms a considerable thermal resistance between the hot outer bulb 4 and the hollow body 8 containing the electronick 6. In this way, in the illustrated burning position of the lamp, overheating leading to the destruction or reduction of the life of the components in the electronics 6 is avoided. For this purpose, temperatures below 80 to 100 ° C. are generally desirable.

Das Zwischenstück 10 ist mit dem Außenkolben 4 und dem Hohlkörper 8 vorzugsweise durch Kleben verbunden. Eine weitere Verminderung des Wärmestroms vom Außenkolben 4 zum Lampenfuß 7 kann dadurch erreicht werden, daß das Zwischenstück 10 nicht über den Gesamtumfang seiner Endflächen am Außenkolben bzw. Lampenfuß festgeklebt wird, sondern nur über einen solchen Teil seiner Endflächen, der zur mechanischen Halterung ausreicht.The intermediate piece 10 is connected to the outer bulb 4 and the hollow body 8, preferably by gluing. A further reduction in the heat flow from the outer bulb 4 to the lamp base 7 can be achieved in that the intermediate piece 10 is not glued to the outer bulb or lamp base over the entire circumference of its end faces, but only over such a part of its end faces that is sufficient for mechanical mounting.

Der Lampenfuß 7 und die in ihm enhaltene Elektronik 6 werden nicht nur durch Wärmeleitung aus dem Außenkolben 4 erhitzt, sondern auch durch heißes Gas, das vom Außenkolben aufsteigt. Um den Lampenfuß 7 gegen derartige heiße Gase zu schützen, ist auf den Außenkolben 4 an seinem lampenfußseitigem Ende ein flanschartig nach außen ragendes, ringförmiges Wärmeschild 11 aufgesetzt. Dieses Wärmeschild 11 kann aus Glas bestehen und mit dem Außenkolben 4 durch Kleben, Kitten oder Verschmelzen verbunden sein.The lamp base 7 and the electronics 6 contained in it are heated not only by heat conduction from the outer bulb 4, but also by hot gas rising from the outer bulb. In order to protect the lamp base 7 against such hot gases, an annular heat shield 11 which projects outward like a flange is placed on the outer bulb 4 at its end on the lamp base side. This heat shield 11 can consist of glass and can be connected to the outer bulb 4 by gluing, cementing or fusing.

Claims (3)

1. A high-pressure discharge lamp with a tubular coaxial intermediate piece made of badly heat- conducting material arranged between the outer bulb and the lamp base, characterized in that the intermediate piece is folded in the shape of a bellows.
2. A lamp as claimed in Claim 1, characterized in that the axial cross-section of the fold pattern of the intermediate piece has a meander shape.
3. A lamp as claimed in Claim 1, characterized in that the intermediate piece is formed as a corrugated tube.
EP85200632A 1984-05-05 1985-04-24 High-pressure discharge lamp Expired - Lifetime EP0161028B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843416714 DE3416714A1 (en) 1984-05-05 1984-05-05 HIGH PRESSURE DISCHARGE LAMP
DE3416714 1984-05-05

Publications (3)

Publication Number Publication Date
EP0161028A2 EP0161028A2 (en) 1985-11-13
EP0161028A3 EP0161028A3 (en) 1987-10-28
EP0161028B1 true EP0161028B1 (en) 1991-01-02

Family

ID=6235072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200632A Expired - Lifetime EP0161028B1 (en) 1984-05-05 1985-04-24 High-pressure discharge lamp

Country Status (4)

Country Link
US (1) US4644216A (en)
EP (1) EP0161028B1 (en)
JP (1) JPS618840A (en)
DE (2) DE3416714A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729305A1 (en) * 1987-09-02 1989-03-16 Philips Patentverwaltung HIGH PRESSURE DISCHARGE LAMP
DE9013279U1 (en) * 1990-09-19 1990-11-22 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
DE19610385A1 (en) * 1996-03-16 1997-09-18 Bosch Gmbh Robert Gas discharge lamp, in particular for motor vehicle headlights
NL2007802A (en) 2010-12-21 2012-06-25 Asml Netherlands Bv A substrate table, a lithographic apparatus and a device manufacturing method.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1145837A (en) * 1914-09-10 1915-07-06 Edward Redmond Hoff Heat-shield for incandescent electric lamps.
US1171509A (en) * 1915-04-22 1916-02-15 Eugen Essich Electric-lighting device.
NL40803C (en) * 1934-06-04
DE684577C (en) * 1936-10-29 1939-12-01 Patra Patent Treuhand Single-socket electric metal vapor discharge lamp with surrounding thermal protection jacket
CH303451A (en) * 1950-02-02 1954-11-30 Buser Johann Ultra-high pressure burner for generating arc light.
NL7809907A (en) * 1978-10-02 1980-04-08 Philips Nv MIXING LIGHT DEVICE.
US4410828A (en) * 1981-06-08 1983-10-18 General Electric Company Jacketed lamp having transverse arc tube
JPS5816456A (en) * 1981-07-22 1983-01-31 Toshiba Corp Fluorescent lamp unit

Also Published As

Publication number Publication date
DE3416714A1 (en) 1985-11-07
EP0161028A2 (en) 1985-11-13
JPS618840A (en) 1986-01-16
DE3580998D1 (en) 1991-02-07
EP0161028A3 (en) 1987-10-28
US4644216A (en) 1987-02-17

Similar Documents

Publication Publication Date Title
DE4435261A1 (en) Quartz lamp
DE2623099C2 (en) Short arc discharge lamp
DE2364528C3 (en) Gas laser
DE2641867A1 (en) ELECTRIC DISCHARGE LAMP
EP0321866B1 (en) High-pressure discharge lamp
DE3248740C2 (en) Radiant heater
EP0161028B1 (en) High-pressure discharge lamp
DE69918249T2 (en) Capacitive triggering of high intensity discharge lamps
EP0237647A1 (en) Motor vehicle discharge lamp
DE3123604C2 (en) Metal vapor high pressure discharge lamp
DE2747258A1 (en) ELECTRIC GAS DISCHARGE LAMP
EP0477735B1 (en) High pressure discharge lamp
DE8421411U1 (en) DISCHARGE LAMP ARRANGEMENT
DE2734099C3 (en) Gas discharge lamp
DE3151513A1 (en) HIGH PRESSURE METAL STEAM LAMP
DE1970609U (en) ELECTRIC LIGHT BULB WITH AN EXTERNAL CRUSH FOOT AND A PROPOSED LIGHT BODY.
DE3416713A1 (en) High-pressure discharge lamp
DE3037223C2 (en)
DE1809443A1 (en) Metal vapor arc lamp
EP0154383B1 (en) Heatable electrode for high-pressure gas discharge lamps
DE3618573A1 (en) DISCHARGE LAMP WITH INNER GAS FILLING, ESPECIALLY FOR IMPULSE OPERATION
DE1913403U (en) LIGHT BULB.
EP0325157B1 (en) Gas discharge lamp
AT149310B (en) Electric discharge tube.
DE655301C (en) In particular, electrical discharge tubes used for light emission, which are surrounded by a cup-shaped, double-walled cover

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: N.V. PHILIPS' GLOEILAMPENFABRIEKEN

Owner name: PHILIPS PATENTVERWALTUNG GMBH

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19880418

17Q First examination report despatched

Effective date: 19891206

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910102

Ref country code: GB

Effective date: 19910102

Ref country code: FR

Effective date: 19910102

Ref country code: BE

Effective date: 19910102

REF Corresponds to:

Ref document number: 3580998

Country of ref document: DE

Date of ref document: 19910207

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920201