CN2669363Y - Multi-cold-cavity double-screw fluorescent lamp - Google Patents

Abstract

The utility model relates to a fluorescent lamp tube that is provided with a plurality of cold cavities, the adjusting lamp tube of the fluorescent lamp tube has high mercury gas pressure, and the stability of the lighting effect of the fluorescent lamp tube is good. The utility model relates to a double-screw lamp tube, and mercury and inert gas are arranged in the lamp tube. A fluorescent powder layer is coated on an oxide cathode, a core column, a conductive wire and the wall of the lamp tube. The fluorescent lamp tube is characterized in that the fluorescent lamp tube is provided with at least three cold cavities, one cold cavity is arranged at the communicating position of the double-screw tube, and other two cold cavities are arranged at the symmetric position of the middle part of the last circuit of the screw tube. The fluorescent lamp tube of the utility model has the advantages that the fluorescent lamp tube utilizes a plurality of cold cavities of the fluorescent lamp tube to adjust the mercury air pressure in the tube and make the mercury air pressure approach to the optimal value, and improves the lighting effect of the lamp tube and the stability of the lighting intensity.

Description

Multi-cold-cavity double helix fluorescent lamp

Technical field

The utility model relates to a plurality of cold caves is set on fluorescent lamp, and especially related fluorescent lamp is a double helical form.

Background technology

Compact fluorescent lamp because of it energy-conservation and compact be widely used in the illumination.Existing fluorescent lamp is and is equipped with liquid mercury or solid-state amalgam is complete, mercury is converted into gaseous state after being heated, after the fluorescent tube energising, gaseous mercury is excited and sends ultraviolet ray, the fluorescent material on the bombardment tube wall, produce visible light, but the ambient temperature difference because fluorescent tube is lit a lamp, the state difference of lighting a lamp, mercury vapour is pressed or high or low variation in causing managing, depart from mercury vapour and press best value, cause fluorescent tube light efficiency instability.In order to improve fluorescent tube light efficiency unsteadiness, formerly one protruding cave is set at the double-helical connection of fluorescent tube position, the projection cave is little because of current density, its surface temperature is low, but the certain mercury amount of aggegation, press in order to mercury vapour in the adjustment fluorescent tube pipe, keep fluorescent tube light efficiency stability, protruding cave is commonly called as to cold cave or claims cold junction.Yet because of the actual state difference of lighting a lamp, the fluorescent tube of single formula ' cold cave ' is different in the light a lamp regulating action of state of difference, for example the double helix interconnecting part lights a lamp, has upper quadrant to light a lamp, have side direction type to light a lamp to following formula sometimes, effect is maximum when following formula is lit a lamp, side direction type is lit a lamp and is acted on secondly, and the upper quadrant effect of lighting a lamp is minimum, and power of lamp tube is big more, the lamp works temperature is high more, and the regulating action that single cold cave structure is risen is more little.

Summary of the invention

The utility model aims to provide a kind of a plurality of cold caves that are provided with on fluorescent lamp tube, it is big to regulate the interior mercury vapour pressure effect of fluorescent tube pipe, and fluorescent tube light efficiency good stability is to the particularly evident multi-cold-cavity spiral fluorescent lamp of high-power fluorescent tube regulating effect.The utility model design multi-cold-cavity spiral fluorescent lamp, comprise the double helical form fluorescent tube, the fluorescent tube inner chamber is equipped with mercury and inert gas, oxide coated cathode, stem stem, seal wire, tube wall scribbles phosphor powder layer, it is characterized in that: three cold caves are set on fluorescent tube at least, a cold cave is arranged on double-helical connection position, and two cold caves are arranged on the symmetric position at one circle middle part, helix tube end.The utility model has the advantages that and utilize adjustable pipe interior mercury vapour in a plurality of cold cave of fluorescent tube to oppress nearly optimum value, keep fluorescent tube light efficiency and luminous luminosity stable, and light a lamp and no matter making progress, downwards or the side direction state, a cold cave is always arranged last, cold cave under give adjustment, and power of lamp tube is big more, its adjustment effect is obvious more, lamp luminescence luminosity stability is good more, cold cave also can be provided with more than three on the fluorescent tube, is separately positioned on second circle, on the 3rd circle or the 4th circle, the mercury vapour pressure reaches best value in the adjusting fluorescent tube pipe to satisfy, and keeps lamp luminescence luminosity stability fully effectively.

Description of drawings

Below in conjunction with drawings and Examples the utility model is elaborated

Accompanying drawing 1 is a structural representation of the present utility model

Accompanying drawing 2 is the cold acupuncture point of a utility model interposed structure schematic diagram

Embodiment

Among the figure by fluorescent tube (1) (1a), oxide coated cathode (2), be equipped with the tube chamber (3) of mercury and inert gas, stem stem (4), tube wall phosphor powder layer (5), seal wire (6) (6a), cold cave (7) is compositions such as (7b) (7a), it is characterized in that: fluorescent tube (1) is (1a) all by equidirectional rotation, form twin-feed spiral, fluorescent tube (a 1) end (1a) connects identical, fluorescent tube (1) other end (1a) respectively is equipped with oxide coated cathode (2), oxide coated cathode (2) and seal wire (6) (6a) join, seal wire (6) (6a) is fixed on the stem stem (4), fluorescent tube (1) (1a) on, be provided with three cold caves (7) (7a) (7b), cold cave (7) is located at the connecting portion of twin-feed spiral, two cold caves (7a) (7b) are located at the position at one circle middle part, fluorescent tube end, when fluorescent tube starts, because the current density at position, cold cave is little, its temperature is lower, has the effect that mercury vapour is pressed in the fluorescent tube pipe of regulating, make the interior mercury vapour of pipe oppress nearly best value, keep lamp luminescence luminosity stable, it is bigger that multi-cold-cavity structure fluorescent tube is regulated the effect that mercury vapour is pressed in the fluorescent tube pipe, variation of ambient temperature adaptability is stronger to lighting a lamp, to making progress, downwards, the side direction state of lighting a lamp causes the balanced action of fluorescent tube local temperature difference better, so can make the fluorescent tube light efficiency remain on higher level, the high-power spiral fluorescent lamp keeps the stable effect of luminous luminosity particularly evident.

Claims (3)

1. multi-cold-cavity double helix fluorescent lamp comprises that being equipped with mercury and inert gas, oxide coated cathode, stem stem, seal wire, tube wall by fluorescent tube, fluorescent tube inner chamber scribbles phosphor powder layer and form, and it is characterized in that: fluorescent tube forms the twin-feed spiral type all by equidirectional rotation.

2. by the described multi-cold-cavity double helix of claim 1 fluorescent lamp, it is characterized in that: be provided with three cold caves on fluorescent tube at least, a cold cave is arranged on double-helical connection position, and two cold caves are arranged on the symmetric position at one circle middle part, helix tube end.

3. by the described multi-cold-cavity double helix of claim 1 fluorescent lamp, it is characterized in that: can be provided with more than three in the cold cave on the fluorescent tube, a cold cave is arranged on double-helical connection position, and the cold cave on the fluorescent tube is since second, be separately positioned on second circle, on the 3rd circle or the 4th circle.

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