EP1786022A1 - Lampe fluorescente compacte à haute puissance - Google Patents
Lampe fluorescente compacte à haute puissance Download PDFInfo
- Publication number
- EP1786022A1 EP1786022A1 EP05425786A EP05425786A EP1786022A1 EP 1786022 A1 EP1786022 A1 EP 1786022A1 EP 05425786 A EP05425786 A EP 05425786A EP 05425786 A EP05425786 A EP 05425786A EP 1786022 A1 EP1786022 A1 EP 1786022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light bulb
- solid
- socket
- pockets
- wall
- 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.)
- Withdrawn
Links
- 239000007787 solid Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- H01J61/32—Special longitudinal shape, e.g. for advertising purposes
- H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
- H01J61/523—Heating or cooling particular parts of the lamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/34—Joining base to vessel
-
- 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 present invention relates generally to the field of the electronic light bulb, and particularly refers to a high-power self-ballasted compact fluorescent light bulb.
- a compact fluorescent light bulb comprises a variously-shaped tubular bulb extending from a base containing an electronic circuit that controls the power to the electrodes, commonly known as a "ballast".
- the electronic circuit is provided on a board attached to said base.
- the light bulb also includes a plastic case, or “socket” ending with a screw base for connection to a lamp holder.
- the light bulb screw base and socket are generally held together by a snap-on connection.
- Light bulbs of the above-described type are in increasingly widespread use for various domestic and industrial plant applications.
- the maximum power does not usually exceed 25W.
- compact fluorescent light bulbs are available with a relatively high power, in excess of 25W.
- the European Standards (and EN 61000-3-2 in particular, which specifies limits for harmonic current emissions) demand the use of a power factor correction device in this type of light bulb whenever the power of the light bulb exceeds 25W. This makes it necessary to add some complicated circuitry on the electronic board, which increases the crowding of the components and leads to the generation of a considerable amount of heat by the system's additional solid-state components in the socket. If it is not dissipated adequately, said additional heat can cause even permanent damage to the electronic components, especially when the light bulb is fitted in a lighting fixture with a closed diffuser.
- the object of the present invention is to produce a compact fluorescent light bulb with a relatively high power, i.e. in excess of 25W, equipped with a power factor correction device incorporated in its socket and nonetheless capable of dissipating the heat generated thereby well enough to avoid any risk of damage to the electronic components contained therein.
- the compact fluorescent light bulb according to the present invention the fundamental feature of which consists in the fact that pockets are provided inside the socket, in the side wall surrounding the inner chamber containing the electronic power and control circuit, said pockets being designed to house the circuit's solid-state components so that, these are in contact with the side wall to dissipate the heat they generate to the outside air through said wall.
- the compact fluorescent light bulb according to the present invention comprises a tubular bulb 1, shaped into "U"-shaped loops in the present embodiment, extending from a base 2, with ventilation slots 2a, to which a printed circuit 3 is attached, containing the ballast and the power factor corrector.
- the light bulb according to the invention conventionally also includes a socket 4 consisting of a tubular wall 5 converging towards a screw base 6 for connection to a lamp holder (not shown).
- the base 2 of the light bulb can be attached to the socket 4 by means of a snap-on connection or other equivalent means.
- the inner surface of the tubular wall 5 contains pockets 7 for housing solid-state components 11 of the printed circuit 3.
- the solid-state components in the present embodiment of the invention are two transistors and one MOSFET, so there are three pockets 7 in the socket 4, angularly spaced at the same distance from one another as the aforementioned components 11.
- the pockets 7 comprise a rear wall 8, from which two substantially side walls, or sides, 9 extend, the free ends of which are joined by a front wall 10 substantially parallel to the rear wall.
- the rear wall 8 is formed as a localized thickening of the tubular wall 5 of the socket 4.
- the front wall 10 on the other hand, is formed by a solid portion 10a, from which a tab 12 extends towards the base 2. The free end of said tab is enlarged on the side facing the rear wall 8.
- a stiffening ribbing 13 runs along the solid portion 10a of the front wall 10 and along part of the tab 12.
- This solution enables the temperature of the solid-state components 11 to be reduced by approximately 25°C (from 92°C without the pockets 7 to 67°C when the components 11 are housed in the pockets 7, in steady temperature conditions, with the light bulb operating in freely-circulating air and placed in a vertical position with the coupling upwards).
- the temperatures increase significantly: in particular, a mean increase of approximately 10°C of all the temperatures has been recorded with respect to an assembly in freely-circulating air.
- the solid-state components 11 would easily reach unacceptable temperatures, near the junction melting temperature, with a consequent permanent failure that occurs when the body of the transistors exceeds a temperature of 120-150°C.
- the temperature of the other electronic components is also advantageously reduced, i.e. the temperature inside the chamber created by the tubular wall 4 is reduced by approximately 11°C (from 83°C to 72°C).
- the benefit deriving from the present invention is consequently not limited to protecting the transistors alone, but also applies to the other components, and the electrolytic capacitor in particular that is the most temperature-sensitive component and that - according to the manufacturers - doubles its lifetime with every 10°C temperature reduction.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05425786A EP1786022A1 (fr) | 2005-11-10 | 2005-11-10 | Lampe fluorescente compacte à haute puissance |
| CNA2006101446176A CN1963990A (zh) | 2005-11-10 | 2006-11-09 | 大功率小型荧光灯泡 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05425786A EP1786022A1 (fr) | 2005-11-10 | 2005-11-10 | Lampe fluorescente compacte à haute puissance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1786022A1 true EP1786022A1 (fr) | 2007-05-16 |
Family
ID=37433867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05425786A Withdrawn EP1786022A1 (fr) | 2005-11-10 | 2005-11-10 | Lampe fluorescente compacte à haute puissance |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1786022A1 (fr) |
| CN (1) | CN1963990A (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0100121A2 (fr) * | 1982-07-26 | 1984-02-08 | North American Philips Lighting Corporation | Unité de lampe fluorescente compacte avec moyens de refroidissement par air séparés |
| US6140751A (en) * | 1998-03-30 | 2000-10-31 | General Electric Company | Electrolytic capacitor heat sink |
| US20030080691A1 (en) * | 2001-10-31 | 2003-05-01 | Takeo Yasuda | Compact selfballasted fluorescent lamp and luminaire |
| US6577066B1 (en) * | 1999-03-30 | 2003-06-10 | Matsushita Electric Industrial Co., Ltd. | Compact self-ballasted fluorescent lamp |
-
2005
- 2005-11-10 EP EP05425786A patent/EP1786022A1/fr not_active Withdrawn
-
2006
- 2006-11-09 CN CNA2006101446176A patent/CN1963990A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0100121A2 (fr) * | 1982-07-26 | 1984-02-08 | North American Philips Lighting Corporation | Unité de lampe fluorescente compacte avec moyens de refroidissement par air séparés |
| US6140751A (en) * | 1998-03-30 | 2000-10-31 | General Electric Company | Electrolytic capacitor heat sink |
| US6577066B1 (en) * | 1999-03-30 | 2003-06-10 | Matsushita Electric Industrial Co., Ltd. | Compact self-ballasted fluorescent lamp |
| US20030080691A1 (en) * | 2001-10-31 | 2003-05-01 | Takeo Yasuda | Compact selfballasted fluorescent lamp and luminaire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1963990A (zh) | 2007-05-16 |
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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 |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
| AKX | Designation fees paid | ||
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20071117 |