CN2574330Y

CN2574330Y - Fluorescent lamp preheating starting device

Info

Publication number: CN2574330Y
Application number: CN 02271915
Authority: CN
Inventors: 黄甜仔
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-24
Filing date: 2002-07-24
Publication date: 2003-09-17
Anticipated expiration: 2012-07-24

Abstract

The utility model relates to a preheating starting device of a fluorescent lamp, which is used for preheating and starting the fluorescent lamp. The utility model is formed by connecting a thermosensitive switch K (frequently closed type) and a thermosensitive resistor R (positive temperature coefficient) in series. When used, the utility model is connected in parallel with a resonant capacitor C arranged in an electronic ballast and simultaneously is connected in series to a filament loop, and the thermosensitive switch is stuck to a fluorescent lamp glass tube or heating elements arranged in the electronic ballast. The utility model not only keeps temperature-resistivity characteristic, but also has the effect of a temperature switch, when the lamp is worked in a normal state, the utility model has no power consumption.

Description

Fluorescent lamp pipeline start up by preheating device

Technical field

The utility model relates to a kind of gas-filled lamp start-up technique, particularly preheating and starting circuit of florescent lamp.

Background technology

As everyone knows, fluorescent lamp is used widely as a kind of efficient illumination light fixture, and its operate as normal need have accessory kit, current limliting and starting drive.Wherein current limliting (ballast) from traditional inductive type turns to electron type (high-frequency lighting) at present, and be used widely.Its fluorescent lamp starting mode of electric ballast on the market, still majority is the quick cold start-up type of high pressure, but supporting fluorescent tube majority be pre-heated cathode modulation (warm start type lamp), in start-up course, simultaneously with the impact of big electric current (be about lamp operating current 2.5 times), the quick cold start-up of this high voltage can directly cause the damage of filament, electronics powder, emitting electrons asymmetric " rectifying effect " also can occur, and this all can influence the life-span of fluorescent tube.

Present more employing thermistor is done preheating type starter device, this is a kind of positive temperature coefficient element (common name PTC) that has, the two ends of the two ends of preheater and the two ends of electric ballast and electric ballast respectively with two filaments of fluorescent lamp between the two ends of magnet oscillator circuit link to each other, see Fig. 1, played the filament pre-heating effect, but shortcoming is not only to consume energy, and owing to causing the parameter variate, temperature influence is easy to damage after using a period of time, in order to address the above problem, I disclose a kind of technical scheme (see figure 2) of novel florescent lamp starter preheat circuit at Chinese utility model patent 94226024.4, it is to have adopted piezo-resistance and thermistor tandem compound, replace single thermistor, make the preheat circuit device both have temperature resistance characteristic, the voltage switch effect is arranged again, thermistor after the preheating is cut-off, solved the problem of energy consumption and damage basically, be widely used.But along with people require illuminating effect more and more higher, fluorescent lamp lamp power constantly increases, and under the situation that increase warm-up time, the piezo-resistance on-off action is restricted and damages the requirement of incompatibility era development easily.

The utility model content

The purpose of this utility model is to provide that a kind of to have temperature resistive, and the fluorescent lamp pipeline start up by preheating device of temperature-sensitive switch effect under heating condition is arranged again, has abundant warm-up time thereby reach, do not consume energy, and non-damageable purpose.

The purpose of this utility model can realize by following technical measures: the fluorescent lamp pipeline start up by preheating device that is composed in series by thermoswitch K (normally closed type) and thermistor R (positive temperature coefficient), or the integrated preheating device KR that forms by above-mentioned two elements, by (seeing Fig. 3, Fig. 4) in two lead-in wires and the filament loop that is serially connected in fluorescent tube after resonant capacitance C is in parallel, and thermoswitch K or preheating device KR be attached on the glass-tube of fluorescent tube filament position.When voltage is applied to the fluorescent tube two ends, thermistor R postpones the high-tension rising of lamp tube ends because the resistance during cold conditions is less, make the fluorescent tube can not instantaneous starter, flow through the electric current of thermistor R in the interior during this period of time entire circuit, and resonant capacitance C charging and discharging currents, make the filament heating.Simultaneously, the resistance value of thermistor R raises with temperature and increases, and then the voltage of lamp tube ends is also along with rising, and finally when voltage reaches the hot turn-on voltage of fluorescent tube, the program of preheating, starter has been finished in the fluorescent tube conducting.After the fluorescent tube conducting, because the heat effect of tube filament is heated the glass-tube of its filament position, when reaching the design temperature of thermoswitch K, the unexpected tripping of normally-closed contact has disconnected connecting of filament loop and thermistor R, makes the thermistor R recover cold state.

Adopt fluorescent lamp pipeline start up by preheating device of the present utility model, the temperature control impedance operator that had both kept common thermistor, the effect that has temperature switch again, reduced the power consumption of thermistor, the problem of having avoided the long-term heating power of thermistor and being easy to damage helps the reliability of lamp works and the useful life of improving fluorescent tube.

Description of drawings

Below in conjunction with accompanying drawing,, understand the utility model better the utility model is elaborated by description to the utility model preheating and starting circuit of florescent lamp device embodiment.

Fig. 1 uses the circuit diagram of PTC type preheat starting circuit for prior art.

Fig. 2 uses the circuit diagram of the preheat starting circuit of thermistor and piezo-resistance tandem compound for prior art.

Fig. 3 is for using one of the utility model pipeline start up by preheating manipulated or operated apparatus.

Fig. 4 is for using two of the utility model pipeline start up by preheating manipulated or operated apparatus.

Fig. 5 is attached to structural representation on the glass-tube of tube filament position for thermoswitch K in the utility model.

Fig. 6 is the structural representation of preheating device KR in the utility model.

Embodiment

As shown in Figure 3, be the utility model pipeline start up by preheating device, it is to be composed in series by thermoswitch K (closed type) and thermistor R, and it and electric ballast, filament are formed series circuit, and in parallel with resonant capacitance C.

Fig. 4 is the another kind of connection of pipeline start up by preheating device, and role is the same.

Fig. 5 is that thermoswitch K is attached to structural representation on the glass-tube of tube filament position in the utility model fluorescent lamp pipeline start up by preheating device.As shown in the figure, its effect is after the fluorescent lamp operate as normal, when the heat that glass-tube sends reaches the design temperature of thermoswitch K, and the normally-closed contact tripping of thermoswitch K, disconnect the series loop of filament and thermistor, make thermistor recover the state of no power work.Thermoswitch K is affixed on other positions or the heat-generating electronic elements in the circuit of electronic ballast of fluorescent glass tubes, its principle is the same with effect, and just the tripping time of thermoswitch K is distinguished to some extent.

Fig. 6 is the structural representation of the utility model preheating device KR.As shown in the figure, thermoswitch K and thermistor R are close to viscose glue is back-to-back, a lead-in wire with thermoswitch K after waiting to do admittedly is connected with a lead-in wire of thermistor, and another lead-in wire of thermoswitch K and thermistor R is as two lead-in wires of preheating device KR.Its effect is when the fluorescent tube preheat mode, thermistor R heating power, and its heat transferred shortens the tripping time of temperature-sensitive K switch to thermoswitch, the power consumption time of thermistor R is further shortened.

Claims

1. a fluorescent lamp pipeline start up by preheating device is characterized in that being composed in series by thermoswitch K (normally closed type) and one or more thermistor R (positive temperature coefficient), and the thermoswitch K after will connecting is attached on the glass-tube of filament position of fluorescent tube.

2. fluorescent lamp pipeline start up by preheating device according to claim 1, the tandem compound that it is characterized in that described thermoswitch K and thermistor R, both can also be close to, connecting as one preheating device KR, and its preheating device KR is attached on the glass-tube of Filament of fluorescent lamp position.

3. according to claim 1,2 described fluorescent lamp pipeline start up by preheating devices, it is characterized in that described thermoswitch K or preheating device KR, can also be attached on other positions of fluorescent glass tubes.

4. according to claim 1,2 described fluorescent lamp pipeline start up by preheating devices, it is characterized in that described thermoswitch K or preheating device KR, can also be attached on the heater element in the circuit of electronic ballast.