CN2305752Y - Low voltage fluorescent lamp without electrode - Google Patents

Abstract

The utility model discloses an electrodeless low-voltage fluorescent lamp, comprising a bulb casing and a concave cavity which is positioned in the center, wherein, the inside of the bulb casing is filled with rare gas and metallic mercury steam, and the bulb casing is sealed in the air-tight method; the inner wall of the bulb casing and the concave cavity which faces to the inner wall of the bulb casing are pasted with three-primary-color fluorescent powder; a work coil which is wound around a magnetic sleeve barrel and is charged by a high-frequency power unit, and a second coil which is wound around the magnetic sleeve barrel are placed in the concave cavity; the number of turns of the work coil is equal to that of the second coil; the second coil is connected with the non-corresponding end of the work coil; the other end of the second coil is suspended in the air into a free end; radially symmetrical points of the circumference of the free end of the second coil are connected with two to four aerials which are parallel to the axial direction of the magnetic sleeve barrel. The utility model, which has advantages of simple structure, long service life and remarkable energy conservation, can particularly reduce space interference by 6-10dB (uv/m).

Description

The electrodeless low-pressure fluorescent lamp

The utility model belongs to a kind of discharge florescent lamp, more specifically relates to a kind of electrodeless low-pressure fluorescent lamp.

Following several discharge florescent lamps are disclosed at present both at home and abroad, a kind of is N.V. Philips' optical lamp manufacturing company's application Chinese patent, number of patent application is 89101293.1 " electrodeless low voltage discharge lamps ", it is a kind of electrodeless low voltage discharge lamp with glass cell-shell, in cell-shell, fill a kind of metal vapors and a kind of rare gas at least, and press the air tight manner sealing-in, discharge lamp is connected to the high frequency power source component and in cell-shell, produces first coil of discharge, one of supply lines of first coil is connected to the supply lines that extends in first coil region and free-ended second coil is arranged, duration of work, electric potential gradient between the first coil two ends equals the electric potential gradient between the second coil two ends substantially, it is characterized in that two ignition antennas are fixed on the free end of second coil and an end of first coil, antenna is put into recessed cover, at the longitudinal axis of the parallel described fuse in the both sides of clavate fuse and extend, antenna extends on the outer wall of tapered wall part at least, antenna is the aluminium strip line, is bonded on the wall and is positioned at the position that faces one another.This lamp produces electromagnetic interference, determined by its operation principle, actuating coil in the electrodeless low-pressure fluorescent lamp can be launched the electromagnetic interference of disturbing miscellaneous equipment work in the air, electromagnetic interference then can be launched towards periphery by supply lines in the high frequency power unit, and this technical scheme is disturbed at inhibition straight space width of cloth blackberry lily does not have positive effect; Another kind is Zhejiang University's application Chinese patent, the patent No. is 95225667.3 " induction discharge fluorescent lamps ", it seals with vacuum sealing mode, be filled with in it power supply from metal vaporizer and rare gas, inwall applies the discharging bulb of layer of fluorescent powder, a recessed cavity is arranged in its bottom, be wound on sleeve the higher authorities that synthetic material is made, be positioned at the induction coil of cavity, be contained in the tubulose iron core that soft magnetic material corresponding with the induction coil inside and outside in the sleeve is made, other end in the tubulose iron core is stretched out outside the cavity together with sleeve and is connected with the heat radiation bearing closed tubular vessel of liquid is housed, the high frequency electric source that output is connected with induction coil, the closed tubular vessel that liquid is housed is the wick heat pipe, and the discharging bulb outer surface applies the conducting film of one deck ground connection, and the profile of discharging bulb is an oval.This induction discharge fluorescent lamp is difficult to guarantee that the suitable volume resistance of conducting film and difficulty find real high frequency zero-potential point and be difficult for playing inhibition space electromagnetic interference.

The purpose of this utility model has provided a kind of electrodeless low-pressure fluorescent lamp, is provided with antenna at the cell-shell inner chamber, and antenna links to each other with coil, and is simple in structure, has suppressed the space electromagnetic interference.

For reaching above-mentioned purpose, the utility model adopts following technical measures: the electrodeless low-pressure fluorescent lamp comprises the cavity of a glass cell-shell and centering, be filled with rare gas and mercury metal steam in the cell-shell, and by hermetically sealed mode sealing-in, inner wall and cavity scribble efficient three primary colors fluorescent powder on the wall of inner wall one side, be placed with in the cavity on magnetic sleeve and by the actuating coil of high frequency power unit power supply, with second coil on magnetic sleeve, actuating coil equates with the number of turns of second coil, and an end of second coil links to each other with the non-corresponding end of actuating coil, the unsettled free end that becomes of the other end is characterized in that connecting two to four antennas with the magnetic sleeve axially parallel on the radial symmetric point of the free end circumference of second coil.

Fig. 1 is an electrodeless low-pressure fluorescent lamp structure schematic diagram.

Fig. 2 is an electrodeless low-pressure fluorescent lamp loop construction schematic diagram.

Below in conjunction with accompanying drawing the utility model is described in further detail:

According to Fig. 1, Fig. 2 as can be known, cell-shell 1 and cavity 2 are made illuminating glass by special use and are made, cell-shell 1 and cavity 2 are by the air tight manner sealing-in, wherein be filled with mercury metal and argon gas, cell-shell 1 inwall and cavity 2 scribble efficient three primary colors fluorescent powder on the wall of cell-shell 1 one sides, the actuating coil 4 and second coil 5 are with on the magnetic sleeve of being made by magnetic material 7, two outputs of the high frequency power unit of lamp socket 9 are received and passed through to two ends of actuating coil 4 respectively, one end of second coil 5 is connected with the non-corresponding end of actuating coil 4, the other end of second coil 5 is unsettled and become free end, actuating coil 4 equates with the number of turns of second coil 5, can guarantee that like this electric potential gradient at actuating coil 4 and second coil, 5 two ends is equal substantially.Antenna 3 and antenna 6 are connected respectively to second coil, 5 free end warp-wise symmetric points places, and with magnetic sleeve 7 axially parallels and place in the cavity 2.Make day electromagnetic field of alignment spatial emission and directly the phase place to air-launched electromagnetic field is opposite by actuating coil, thereby play the effect that suppresses the space electromagnetic interference.The two ends 10,20 of actuating coil 4 are connected with high frequency power unit output respectively, and wherein an end 20 of actuating coil 4 is connected with the ground end of high frequency power unit.Go out to keep the normal running conditions of magnetic material for the ease of the loss thermal conductance that magnetic sleeve 7 is produced in the course of the work, magnetic sleeve 7 is enclosed on the metal heat conductive rod 8, heat conductive rod 8 is connected with lamp socket 9, so as with the heat dissipation of deriving in surrounding air.

The utility model compared with prior art has the following advantages: simple in structure, and long service life, light Effect is strong, improves 4-6 doubly than general ordinary incandescent lamp, and obvious energy conservation especially can reduce the space and disturb 6-10dB (uv/m) can be widely used under water, the building decoration field.

Claims (1)

1, a kind of electrodeless low-pressure fluorescent lamp, the cavity (2) that comprises cell-shell (1) and centering, be filled with rare gas and mercury metal steam in the cell-shell (1), press the air tight manner sealing-in, cell-shell (1) inwall and cavity (2) scribble efficient three primary colors fluorescent powder on the wall of cell-shell (1) inwall one side, be placed with in the cavity (2) around magnetic sleeve (7) and go up and by the actuating coil (4) of high frequency power unit power supply, with second coil (5) on magnetic sleeve (7), actuating coil (4) equates with the number of turns of second coil (5), one end of second coil (5) is connected with the non-corresponding end of actuating coil (4), the other end of second coil (5) is unsettled and become free end, it is characterized in that radial symmetric point at the free end circumference of second coil (5) is connected with two to four antennas (3) with magnetic sleeve (7) axially parallel, (6).

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