Compact fluorescent lamp

A fluorescent lamp, compact technology, applied in the use of discharge lamps, gas discharge lamps, parts of gas discharge lamps, etc., can solve the problems of efficiency reduction, temperature rise, etc., to improve efficiency, reduce temperature rise, and length will shorten the effect

Inactive Publication Date: 2009-12-16
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Due to the high optimal temperature, in the case of ordinary liquid mercury, it will be darker before reaching this temperature
There is a problem of not reducing the efficiency too much in response to the temperature rise in the lighting fixture

Method used

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  • Compact fluorescent lamp
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042] Figure 1 to Figure 6 is a diagram showing Embodiment 1, figure 1 It is a figure showing the overall structure of the compact fluorescent lamp 1 ((a) is a plan view, (b) is a front view), figure 2 is the top view of the lamp housing, image 3 is a partial longitudinal sectional view of the U-shaped tube 2, Figure 4 is a cross-sectional view of the U-shaped tube top 2a of the U-shaped tube 2, Figure 5 It is a figure which shows the 1st modification which combined the U-shaped tube 20 and the U-shaped tube 21 which differ in shape, Figure 6 It is a figure which shows the 2nd modification which combined the U-shaped tube 20 and the U-shaped tube 22 which differ in shape.

[0043] Such as figure 1 As shown, the compact fluorescent lamp 1 has: four U-shaped tubes 2 (glass lamp tubes) are fusion-bonded to each other between the side walls of the ends (joint portion 2a), thereby forming an internal whole formed by eight glass lamp tubes. On the top is a luminous tube 5...

Embodiment approach 2

[0081] Figure 7 It is a figure which shows Embodiment 2, and is a figure which shows the base line vicinity of the compact fluorescent lamp 1. FIG.

[0082] Since the luminous tubes 5 have 8 columns, the temperature of the luminous tubes 5 rises compared with a lamp with 6 columns of the same wattage. Therefore, the temperature of the base 4 also rises. The material of the lamp cap 3 is PET etc., so if the temperature of the lamp cap 4 rises, it will deteriorate. Therefore, in this embodiment, a method of lowering the temperature of the base 4 is considered.

[0083] The part relevant to the temperature of the lamp cap 4 is the filament 6 ( Figure 7 ), and the junction 2c between the U-shaped tubes 2 ( Figure 7). Both the filament 6 serving as a discharge starting point and the joint portion 2 c between the U-shaped tube 2 serving as a discharge circuit become high in temperature. Keeping the joint portion 2c between the filament 6 and the U-shaped tube 2 away from th...

Embodiment approach 3

[0091] Figure 8 ~ Figure 10 is a diagram showing Embodiment 3, Figure 8 is a diagram showing the overall structure of the compact fluorescent lamp 101, Figure 9 is a top view of the lamp base housing 103, Figure 10 is a partial longitudinal sectional view of the U-shaped tube 102 .

[0092] Such as Figure 8 As shown, the compact fluorescent lamp 101 has: four U-shaped tubes 102 (glass tubes) are fused and bonded to each other between the side walls of the ends (joint portion 102a), thereby forming an internal whole formed by eight glass tubes. The upper part is a luminous tube 105 with a serpentine discharge circuit, which has a flat part 103b for fixing the luminous tube 105 by bonding or the like, and a lamp base housing 103 with an octagonal side wall 103a in cross section connected to the flat part 103b , a base 104 having a base pin 104 a fitted in the base case 103 and electrically connected to the lead wire of the arc tube 105 .

[0093] Although not shown in ...

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Abstract

It is an object to provide a compact-type fluorescent lamp having eight or more tubes using liquid mercury in which a part serving as a coldest point which is at about 50 DEG C upon lighting is created in a luminous tube distal end portion, and the temperature in the vicinity of a base can be reduced. In a compact-type fluorescent lamp in which a luminous tube is composed of eight or more U-shaped tubes and the mercury vapor pressure is not regulated, the cross section of a vertex portion of at least one of the U-shaped tubes has a shape in which a wide portion is present near a diverging portion of the U-shaped tube, and the shape is tapered from the wide portion toward a distal end portion of the vertex portion; a tube axial-direction inner size L1 of the vertex portion meets the expression, 11 L 1 17 unit is mm and a tube axial-direction size L2 from the wide portion in the vicinity of the diverging portion of the U-shaped tube to the distal end portion of the vertex portion meets the expression, L 1 - 7 <= L 2 <= L 1 - 2 unit is mm.

Description

technical field [0001] The invention relates to compact fluorescent lamps with more than 8 columns. Background technique [0002] Among the 6-pillar compact fluorescent lamps, the length of a 70W lamp with a luminous flux of 5200lm (lumen) is 220mm, and it is not suitable for narrow places in actual use. That is, in the case of vertical recessed ceiling lights, the height of the ceiling is a problem. If the light exceeds 210mm, there will be the following problem, that is, the lighting fixtures designed to match it cannot be installed on the ceiling. 210mm is considered an upper limit. Therefore, a method of using 8 columns instead of 6 columns and shortening the length has been studied (for example, see Patent Document 1). [0003] Compared with the case of 6 poles, the energy radiated between the lamp tubes of the compact fluorescent lamps of 8 poles and the conduction heat at the lamp base etc. will inevitably increase, resulting in a rise in temperature. In the type i...

Claims

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Application Information

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IPC IPC(8): H01J61/32H01J5/50H01J61/30
CPCY02B20/19Y02B20/00
Inventor 桐生正幸村松辉隆大泽隆司铃木量
Owner OSRAM GMBH
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