EP1325510A1 - Lamp for an explosion-proof lighting unit - Google Patents
Lamp for an explosion-proof lighting unitInfo
- Publication number
- EP1325510A1 EP1325510A1 EP01965150A EP01965150A EP1325510A1 EP 1325510 A1 EP1325510 A1 EP 1325510A1 EP 01965150 A EP01965150 A EP 01965150A EP 01965150 A EP01965150 A EP 01965150A EP 1325510 A1 EP1325510 A1 EP 1325510A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- pressure
- envelope bulb
- temperature
- lamp according
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/50—Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines
-
- 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
- H01J61/34—Double-wall vessels or containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/56—One or more circuit elements structurally associated with the lamp
Definitions
- the invention relates to a lamp for use in explosion-proof luminaires with at least one inner lamp encapsulated in an enveloping bulb and a lamp holder electrically connected thereto, an insulating space formed between the enveloping bulb and the inner lamp being at least partially evacuated.
- Such a lamp is known from DE 32 36529.
- the temperature and pressure inside the lamp must be high enough to generate light.
- the envelope bulb is provided around the inside lamp and the insulating space formed between them is at least partially evacuated.
- a lamp equipped with the lamp described above can be used in potentially explosive areas in which, for example, combustible gases, vapors or mists are present, which could be ignited by the temperature of the interior lamp.
- DE 36 114 84 describes for a similar explosion-protected lamp that in such a case, for example, a filament of the interior lamp should be destroyed if the lamp is damaged. This is to prevent an explosive mixture from reaching the interior lamp from reaching the indoor lamp before it has cooled down sufficiently. In this case, the destruction of the filament of the interior lamp could be delayed so long that the temperature of the lamp is not yet sufficiently low if an explosive mixture comes into contact with the hot parts of the lamp. As a result, an explosion in such an explosive area is not sufficiently prevented.
- At least one pressure and / or temperature sensor is assigned to the isolation space, which has an interruption circuit for interrupting the voltage supply to the lamp when determining a pressure or a temperature greater than one the predetermined maximum value is connected in each case.
- the pressure or temperature sensor quickly and reliably detects a breakdown of the vacuum or an associated temperature increase in the isolation room. As soon as the corresponding pressure or temperature is greater than a maximum value for pressure and temperature specified for the potentially explosive area, the voltage supply to the luminaire is interrupted by a corresponding circuit breaker. This means that not only is the temperature of the lamp lowered, but at the same time the lamp is switched off. This reliably prevents an explosion in the area, and it is in no way necessary to destroy the interior lamp as proposed in the prior art.
- the pressure sensor can be arranged on the inside of the envelope bulb. The arrangement is preferably carried out at a location which does not hinder the emergence of light from the lamp for the intended lighting purposes.
- the temperature sensor can be provided.
- the temperature measurement can be provided both inside or directly outside the envelope piston, as a result of which the corresponding temperature sensor can be arranged on the inside and / or outside of the envelope piston.
- the same restrictions apply to the arrangement of the temperature sensor as to the pressure sensor, i.e. light emission should be prevented as little as possible.
- these can be connected to the interrupter circuit via corresponding connecting wires.
- the interrupter circuit evaluates the signals at the same time.
- the circuit breaker can be arranged externally and optionally centrally for a number of lights.
- it can be possible to transmit a pressure and / or temperature measured value from the corresponding sensor via the supply lines of the lamp to the interrupter circuit.
- the corresponding measured values can be modulated onto the supply voltage and transmitted to the interrupter circuit, where they are demodulated and evaluated.
- Other devices for transferring the measured values are possible.
- the inner lamp can be melted in the envelope bulb and connecting wires of the inner lamp can be passed through the envelope bulb in the direction of the lamp holder.
- pressure sensor and / or temperature sensor can be arranged in or near the lamp holder. It is also possible that the corresponding sensor is part of the circuit breaker or both are integrated in one circuit. The sensor or the corresponding circuit can be arranged, for example, on an upper side of the casting resin used to encapsulate the enveloping piston and facing the insulating space.
- the shape of the envelope bulb can be optimized with regard to the light yield, the temperature distribution or the like, in particular spherical or paraboloid envelope tubes, see DE 36 114 84, are possible.
- Fig. 1 shows a longitudinal section through an embodiment of a lamp according to the invention in a simplified representation.
- the lamp 1 has an interior lamp 3. This is, for example, a discharge lamp, such as a halogen lamp, high-pressure sodium lamp, high-pressure mercury lamp or the like.
- the inner lamp 3 can be arranged with its socket 13 in the lamp 1.
- Connecting wires 9, 10 are guided from the socket 13 to a lamp socket 4 of the lamp 1.
- the connecting wire 9 connects the approximately cylindrical outer walls of the sockets 13, 4 and the connecting wire 10 uses corresponding contact lugs 14, 15 of the respective sockets, which are electrically insulated from the cylindrical outer walls of these sockets.
- a pressure sensor 6 is arranged on an inside of the envelope piston 2. Its arrangement is in particular such that light exit from the lamp 1 is as unobstructed as possible.
- the pressure sensor 6 can also be arranged, for example, in the interior of the holder 4 or on a surface of the casting resin 12.
- a temperature sensor 7 arranged. This can be arranged both inside the envelope bulb 2, in the area of the lamp holder 4 or on an outside of the envelope bulb 2.
- FIG. 1 shows in particular how the pressure sensor 6 is connected via a corresponding connecting line 16 to an interrupter circuit 8 arranged in the lamp holder 4.
- This circuit breaker switches the lamp 1 voltage-free when a value greater than a predeterminable maximum value for pressure or temperature is measured by one of the sensors 6, 7.
- a simple exemplary embodiment of such an interrupter circuit is an electrically triggerable switch which, for example, interrupts the connecting wire 10 when the pressure or temperature value is too high.
- pressure sensor 6 which are both small enough for installation in the lamp 1 according to the invention and fast enough to respond to a corresponding pressure increase in the insulation space 5.
- pressure sensors are piezoresistive or capacitive, micromechanical pressure sensors and the like.
- the temperature sensor can be designed as a thermocouple, resistance thermometer or the like.
- the interrupter circuit 8 is arranged outside the lamp 1.
- an interruption circuit can be used for a multiplicity of lamps or luminaires, these lamps or luminaires being able to be switched off either entirely or selectively.
- the lamp according to the invention ensures that an explosive atmosphere surrounding it cannot be ignited.
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Eye Examination Apparatus (AREA)
- Resistance Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20017372U | 2000-10-10 | ||
DE20017372U DE20017372U1 (en) | 2000-10-10 | 2000-10-10 | Lamp for explosion-proof luminaire |
PCT/EP2001/008797 WO2002031860A1 (en) | 2000-10-10 | 2001-07-30 | Lamp for an explosion-proof lighting unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1325510A1 true EP1325510A1 (en) | 2003-07-09 |
EP1325510B1 EP1325510B1 (en) | 2018-04-04 |
Family
ID=7947472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01965150.4A Expired - Lifetime EP1325510B1 (en) | 2000-10-10 | 2001-07-30 | Lamp for an explosion-proof lighting unit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1325510B1 (en) |
DE (1) | DE20017372U1 (en) |
NO (1) | NO328213B1 (en) |
WO (1) | WO2002031860A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006054784A1 (en) * | 2006-11-21 | 2008-05-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electric lamp with a lamp bulb |
CN103542297A (en) * | 2013-10-24 | 2014-01-29 | 徐春荣 | Flameproof lamp |
CN110360502A (en) * | 2019-06-21 | 2019-10-22 | 深圳市富高康电子有限公司 | Explosion-proof lamp |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3117592A1 (en) * | 1981-05-04 | 1983-01-20 | Heinz Dr. 8000 München Busch | Safety luminaire (lamp) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE223891C (en) * | ||||
AT122241B (en) * | 1929-05-06 | 1931-04-10 | Siemens Ag | Firedamp proof light bulb. |
DE695746C (en) * | 1938-06-26 | 1940-08-31 | Concordia Elek Zitaets Akt Ges | Incandescent lamp with automatic power interruption, especially for mine lamps |
US4752718A (en) * | 1975-05-13 | 1988-06-21 | Duro-Test Corporation | High intensity discharge lamp with integral means for arc extinguishing |
US4156830A (en) * | 1975-05-13 | 1979-05-29 | Duro-Test Corp. | High intensity discharge lamp with integral means for arc extinguishing |
DE2919204A1 (en) * | 1979-05-12 | 1980-11-27 | Sovilla Brulhart Heinz | High efficiency incandescent lamp - has convection and radiation losses minimised by having filament enclosed in thick-walled IR-absorbing bulb inside outer bulb |
DE3244570A1 (en) * | 1982-12-02 | 1984-06-07 | Ceag Licht- Und Stromversorgungstechnik Gmbh, 4770 Soest | Arrangement for electronic protection of battery-operated incandescent lamp circuits |
HU192240B (en) * | 1984-07-03 | 1987-05-28 | Philips Nv | Explosion-proof incandescent lamp |
AU2868289A (en) * | 1988-01-28 | 1989-08-03 | Abb Ceag Licht-Und Stromversorgungstechnik Gmbh | Explosion proof discharge lamp |
DE9101460U1 (en) * | 1991-02-08 | 1991-05-02 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | Single-ended electric lamp |
DE4323003A1 (en) * | 1993-07-09 | 1995-01-19 | Poellet Wilfried | Sensor-controlled cut-off for radiation luminaire with halogen lamp |
DE19623605A1 (en) * | 1996-06-13 | 1997-01-02 | Zoltan Koeves | High pressure sodium lamp |
-
2000
- 2000-10-10 DE DE20017372U patent/DE20017372U1/en not_active Expired - Lifetime
-
2001
- 2001-07-30 EP EP01965150.4A patent/EP1325510B1/en not_active Expired - Lifetime
- 2001-07-30 WO PCT/EP2001/008797 patent/WO2002031860A1/en active Application Filing
-
2003
- 2003-04-09 NO NO20031613A patent/NO328213B1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3117592A1 (en) * | 1981-05-04 | 1983-01-20 | Heinz Dr. 8000 München Busch | Safety luminaire (lamp) |
Non-Patent Citations (1)
Title |
---|
See also references of WO0231860A1 * |
Also Published As
Publication number | Publication date |
---|---|
NO20031613L (en) | 2003-04-09 |
WO2002031860A1 (en) | 2002-04-18 |
DE20017372U1 (en) | 2002-02-21 |
NO328213B1 (en) | 2010-01-11 |
NO20031613D0 (en) | 2003-04-09 |
EP1325510B1 (en) | 2018-04-04 |
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