CN101175356A

CN101175356A - Preheat starting combined switch of fluorescent lamp

Info

Publication number: CN101175356A
Application number: CNA2006100973552A
Authority: CN
Inventors: （发明人请求不公布姓名）
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-01
Filing date: 2006-11-01
Publication date: 2008-05-07

Abstract

The present invention is formed by connecting a glow discharge switch A and a normally closed type vacuum delay switch B with a heater in series. The two pins which are connected with each other in series are respectively connected with one pin of a filament at the two ends of a fluorescent lamp. When the fluorescent lamp is started, the switch A is closed quickly, so electric current flows through the filament through the closed switches A and B to preheat the filament. After about one to two seconds, the switch B is disconnected by thermal because of being heated, so the fluorescent lamp is lighted and the switch A is not closed any more. The present invention has the advantages that the preheating of the filament is sufficient and reliable; the preheating device has not addition power dissipation; the life of the fluorescent lamp and the efficiency of light of the system are greatly increased.

Description

Preheat starting combined switch of fluorescent lamp

The present invention relates to a kind of fluorescent lamp pipeline start up by preheating device, especially a kind of when fluorescent lamp starting abundant preheating filament, and after the fluorescent lamp normal ignition novel florescent lamp preheat starting combined switch of no additional power consumption.

At present most electronic ballast fluorescent lamps are not installed the pipeline start up by preheating device on the China market, thereby do not have preheating filament and belong to so-called cold start-up when fluorescent lamp starting.This cold start-up meeting causes a large amount of high-energy positive ion bombardment negative electrodes, has seriously shortened the useful life of fluorescent lamp.Minority is equipped with the electronic ballast fluorescent lamp product of pipeline start up by preheating device, uses semistor PTC as the pipeline start up by preheating device mostly, yet, perhaps because the thermal capacity of PTC is too little, lacks very much and make preheating insufficient the warm-up time of its generation, effect is bad; Perhaps, make the additional power consumption that itself produces big (near 1W), and price is more expensive because thermal capacity is bigger.Moreover, actual operating position shows that PTC also has the critical defect that reliability is relatively poor, the life-span is short as fluorescent lamp pipeline start up by preheating device.Therefore, though use the fluorescent lamp circuit of PTC many, the not fine solution of pipeline start up by preheating problem.(can consult " principle of electronic energy-saving lamp and electric ballast and manufacturing " chapter 8, Chen Chuanyu writes, People's Telecon Publishing House, 2004.8, ISBN7-115-12337-3).

Also have many patented technologies about fluorescent lamp pipeline start up by preheating device, for example the patent No. is respectively 02215333.0,02271915.6 and 99257116.2 or the like, the employing PTC that has in them add the fluorescent lamp starter jump bubble, have add PTC or the like with piezo-resistance, but they or pre-heat effect is bad or poor reliability, life-span short or the cost height, all impracticable.

Purpose of the present invention is exactly the outstanding difficult problem that the electronic ballast fluorescent lamp that will solve present existence does not have good pipeline start up by preheating device.Design a kind of new electronic ballast fluorescent lamp pipeline start up by preheating device, can produce enough preheat curents and warm-up time, when realize starting to the abundant preheating of filament, and, this pipeline start up by preheating device does not produce additional power consumption after the fluorescent lamp normal ignition, and has advantages such as reliability height, the life-span is long, cost is lower.

The solution of the present invention is such: a glow switch A is used as fluorescent lamp pipeline start up by preheating device with the unit switch that the normally closed type vacuum delay switch B that is with calandria is in series, glow switch A wherein comes down to a kind of switch of overvoltage auto-closing, when the voltage that is added in its two ends during more than or equal to its keep-alive voltage, just produce glow discharge between switch A two electrodes, discharge produces heat effect to its two electrodes, make its moving electrode generation thermal deformation action and make two electrode rapid closings, so switch A connects and short circuit; The normally closed type vacuum of band calandria wherein postpones switch B and comes down to a kind of vacuum switch that disconnects action that can postpone to produce when flowing through electric current.Situation is such, when electric current flows through switch B, also flow through calandria/silk wherein and its temperature is raise rapidly, and by thermal radiation and heat conduction make be in contact with it or contiguous moving electrode also temperature raise and produce thermal deformation and move, be deformed to two original closed electrode contacts are disconnected, postpone the function that disconnects behind the electric current thereby have to flow through.Therefore, this unit switch that is in series by switch A and switch B is connected between the filament at fluorescent lamp two ends, when fluorescent lamp starting, because lamp tube ends voltage is higher, the keep-alive voltage that is higher than switch A glow discharge, make generation glow discharge between its two electrode and make switch A rapid closing, so electric current is by the electrode contacts of the closure of switch A and switch B and the calandria/silk among the switch B, flow through Filament of fluorescent lamp again and make its preheating, after a period of time (as 1-2 second), switch B postpones to disconnect, and fluorescent lamp is fully being lighted behind the preheating filament.Because the resistance value (its heating power just) of calandria/silk can be regulated in design, therefore, can be adjusted to the size of preheat curent and warm-up time and meet the requirements.Postpone to disconnect and when lighting fluorescent lamp at switch B, cut off the electric current that flows through switch A, switch A glow discharge is extinguished and from newly being in off-state, and because the keep-alive voltage of its glow discharge is higher than the fluorescent lamp normal working voltage, so normally start no longer closure of back switch A at fluorescent lamp.Therefore, this unit switch does not flow through electric current after lamp is lighted, and does not just have additional power consumption yet.Also because of this, this unit switch just quits work after fluorescent lamp is lighted, be in ' rest ' state, in addition, the gas discharge tube and the vacuum tube that are shell with glass, do electrode with metal have stronger overload capacity, so unit switch also has long-life and highly reliable advantage as the pipeline start up by preheating device of fluorescent lamp.

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is circuit theory diagrams of the present invention.

Fig. 2 is the schematic diagram of structure of glow switch A in the embodiments of the invention.

Fig. 3 is the schematic diagram of structure that the normally closed type vacuum of band calandria among first embodiment of the present invention postpones switch B.

Fig. 4 is the schematic diagram of structure that the normally closed type vacuum of band calandria among second embodiment of the present invention postpones switch B.。

Among the figure:

A is a glow switch; B postpones switch for the normally closed type vacuum of band calandria; FL is a fluorescent lamp;

1,2 is the pin of glow switch A;

3, the 4 normally closed type vacuum for the band calandria postpone the pin of switch B;

5,6 is two electrodes of glow switch A;

7, the 8 normally closed type vacuum for the band calandria postpone two electrodes of switch B;

The 9 normally closed type vacuum for the band calandria postpone the calandria among the switch B

Embodiment:

In Fig. 1, the pin 2 of glow switch A is connected with the pin 3 that the normally closed type vacuum of band calandria postpones switch B, switch A is connected with B, and two

pins

1,4 after the series connection are connected with a pin of the filament at fluorescent lamp two ends respectively in use.

In Fig. 2, glow switch A by glass shell, two

electrodes

5 and 6, two

pins

1 and 2 and the working gas that is filled in the glass bulb formed, in two electrodes one is the stationary electrode 5 of the no deformed movement that constitutes of wire or sheet metal, another is the moving electrode 6 that thermal deformation action can take place that is made of bimetal leaf, and perhaps two

electrodes

5 and 6 all are the moving electrodes that the thermal deformation action can take place that is made of bimetal leaf; Be filled in working gas in the glass bulb and be inert gas such as argon, neon, helium or by several mists of forming in them.

The calandria 9 that postpones among the switch B in the normally closed type vacuum of the band calandria of first embodiment shown in Figure 3 is a resistance wire.

The calandria 9 that postpones among the switch B in the normally closed type vacuum of the band calandria of second embodiment shown in Figure 4 is a film resistor or volume resistance.

For easy to use, should reduce the volume of switch A and switch B as much as possible, its glass shell can be made diameter is 3 to 6 millimeters, length is 10 to 20 millimeters.

Claims

1. preheat starting combined switch of fluorescent lamp, it is characterized in that being in series by the glow switch A and the normally closed type vacuum delay switch B of band calandria, switch A and switch B have pin 1,2 and 3,4 respectively, the pin 2 of switch A is connected with the pin 3 of switch B, switch A is connected with B, and two pins 1,4 after the series connection are connected with a pin of the filament at fluorescent lamp two ends respectively in use.

2. a kind of preheat starting combined switch of fluorescent lamp as claimed in claim 1, it is characterized in that glow switch A wherein is made up of with the working gas that is filled in the glass bulb glass shell, two electrodes, two pins, in two electrodes one is the stationary electrode 5 of the no deformed movement that constitutes of wire or sheet metal, another is the moving electrode 6 that thermal deformation action can take place that is made of bimetal leaf, and perhaps two electrodes 5 and 6 all are the moving electrodes that the thermal deformation action can take place that is made of bimetal leaf; Be filled in working gas in the glass bulb and be inert gas such as argon, neon, helium or by several mists of forming in them.

3. a kind of preheat starting combined switch of fluorescent lamp as claimed in claim 1, the normally closed type vacuum delay switch B that it is characterized in that band calandria wherein is made up of with two pins glass shell, two electrodes, a calandria/silk, wherein an electrode in two electrodes is the stationary electrode 7 of the no deformed movement that constitutes of wire or sheet metal, is drawn by a pin 3; Another electrode is the moving electrode 8 that the thermal deformation action can take place that is made of bimetal leaf, this electrode does not have pin and draws, perhaps above-mentioned two electrodes 7 and 8 all are the moving electrodes that the thermal deformation action can take place, this two electrode keeps in touch at normal temperatures, be normally closed/logical state, and one of moving electrode 8 and calandria/silk 9 is connected, and the other end of calandria/silk 9 is connected with pin 4, is drawn by pin 4.

4. a kind of preheat starting combined switch of fluorescent lamp as claimed in claim 1 is characterized in that glow switch A wherein is 3 to 6 millimeters with the external diameter that the normally closed type vacuum of being with calandria postpones the glass shell of switch B, and length is 10 to 20 millimeters.