CN2192124Y

CN2192124Y - AC and battery dual-purpose fluorescent lamp

Info

Publication number: CN2192124Y
Application number: CN 94209375
Authority: CN
Inventors: 李上灿
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-01
Filing date: 1994-04-20
Publication date: 1995-03-15
Anticipated expiration: 2004-04-20

Abstract

The output voltage of the voltage-stabilized power supply is slightly lower than the voltage-stabilized value of D5-D7, and the series isolation diode D9 is connected with the No. 1 battery pack DC in parallel, so that two power supply states are automatically switched, manual operation is avoided, and the battery is charged at a constant voltage during alternating current power supply, so that the service life of the battery is prolonged to the maximum extent, namely, the updating cost of the battery is reduced; the fluorescent lamp inverter YH uses a high-frequency self-excited single-tube intermittent oscillator, during the Q3 off period, N3 generates a dc pulse to electrically start and ignite the 6W fluorescent lamp YG, N4 heats the filament at one end of the YG to avoid a great difference in brightness between the two ends, and the lamp switch Ka + Kb switches the power supply and adjusts the N2 turns to perform two-step dimming.

Description

AC and battery dual-purpose fluorescent lamp

The utility model relates to an electric light source lighting technology.

In view of the circumstances such as the power failure of the electric wire netting, mobile lighting, etc., need the electric light source lighting apparatus of dual-purpose of AC/DC, the electro-optic conversion rate of the fluorescent lamp is multiple and incandescent lamp is adopted preferably, patent and patent application related to this technology have "a rechargeable electronic daylight lamp of AC/DC" (application number 89200898.9), "the dual-purpose fluorescent lamp of AC/DC" (application number 93201826.2), etc., all there are disadvantages- -the fluorescent lamp tube is the ionic device that presents the negative resistance characteristic, it is obviously unsuitable to adopt the power supply of the push-pull type converter, the circuit adopting the single-tube converter is imperfect, it is unnecessary to use the relay or switch to make AC/DC power supply state automatic conversion or manual conversion, the rectifier power supply is too simple, can't steady voltage output, etc.; the AC/DC fluorescent lamp with matched batteries has many advantages, so that the inventor applies for a patent (application number 94200319.5) entitled AC/battery dual-purpose fluorescent lamp in 1 month and 1 day in 94 years, and the performance of the fluorescent lamp is not perfect and needs to be improved.

The utility model aims at providing a technical performance, the better dual-purpose fluorescent lamp of alternating current of practicality and battery require to have the dimming function, should be able to start and move when battery voltage descends by a wide margin, and its operating current's decline range will be less than the decline range of battery voltage, and the batch production of mill will be considered in circuit design.

The figure is a circuit diagram of an alternating current and battery dual-purpose fluorescent lamp, which comprises a stabilized voltage power supply, a battery pack DC, a fluorescent desk lamp and the like, wherein the stabilized voltage power supply comprises a power plug, a power line, a power transformer B1, a fuse RD1, bridge rectifiers D1-D4, a filter electrolytic capacitor C1 and a linear working serial stabilized voltage power supply circuit which are connected in series and are sequentially connected, the latter comprises a voltage adjusting tube Q2 connected in series between the output end of the rectifier and a load, namely between the DC and the fluorescent desk lamp, and a current amplifying tube Q1 connected with the voltage adjusting tube Q2, wherein the base electrode of the Q1 obtains a stable voltage from a diode voltage stabilizing circuit consisting of R1 and D5-D7, the output voltage is equal to the stable voltage value minus the voltage drop of an emitting junction of the Q1 and the Q2, a light emitting diode D8 is used for alternating current indication, the R2 is used for current limitation, an isolating diode D9 is used for blocking the current flowing to the stabilized voltage power supply, and the DC adopts a No. 1 common zinc-manganese battery or a high-energy/large-capacity battery with the same size, and RD2 is used for over-current protection; the fluorescent desk lamp comprises a lamp switch, namely a double-pole three-throw switch Ka + Kb, a fluorescent lamp converter YH in a dotted line frame, a fluorescent lamp tube YG and a tube seat thereof, a lamp shade and a metal soft stem, wherein the YH adopts a high-frequency transformer feedback and a parallel self-excited single-tube intermittent oscillator with a base electrode RC timing of an oscillating tube, C2 is used for high-frequency and low-frequency filtering, the oscillating tube Q3 adopts an NPN tube, the oscillating transformer B2 adopts a ferrite magnetic core and has four windings, a primary winding N1 and a positive feedback winding N2 are respectively connected with a collector circuit and a base circuit of the Q3, the fluorescent lamp tube winding N3 is connected with two end filaments of the fluorescent lamp tube YG, a filament winding N4 is connected with one end filament of the YG, wherein N1, N4 and N3 are sequentially connected in series, namely continuously wound in the same direction and tapped by two steps, N2 is provided with a tap for two-step dimming, the lamp switch Ka + Kb which is turned on, is turned from a lamp turn-off position 1 to a large-on position 2 or a small-off position 3, the power is switched on, Q3 is started by a bias resistor R3 and the like and generates intermittent oscillation due to positive feedback between N2 and N1, the turn-on period, the turn-off period and the period of the Q3 are mainly determined by a timing capacitor C3, a timing resistor R6 and a turn ratio of N2/N1, during the turn-off period of the Q3, B2 converts the energy stored during the turn-on period of the Q3 to YG, namely N3 induces DC pulse voltage (the polarity is negative and positive and upper) and feeds the DC pulse voltage to YG, the starting and ignition are carried out, meanwhile, N2 loop current charges C3 through D10 and R6, D10 voltage drop forms the reverse bias of the Q3 to maintain the turn-off state of the Q3, when Kb is at a position 2, N2 is completely switched in and has more turns, the peak value and the effective value of the collector current of the Q3 (namely the working current of the electrode, namely the power supply current and YH) are both large, the turn-on period, the turn-off period and the period are both long, the frequency is low, and the lamp power and the lamp brightness are large, when Kb is at position 3, N2 only uses one part, the number of turns is small, the peak value and the effective value of collector current of Q3 are small, the period is short, the frequency is high, the lamp power and the lamp brightness are small, the position arrangement sequence of Ka + Kb is lamp-off, high brightness and low brightness, when the low brightness is used, the lamp can be conveniently started by the high brightness first and then converted into low brightness to operate, so that the starting is fast, the lamp tube is fully triggered, and the point has significance at low temperature; the metal soft stem of the fluorescent desk lamp is connected with the anode of the power supply; when the voltage-stabilized power supply is produced in batches in factories, in order to adapt to the dispersion of components, the working current/lamp power of the low-brightness operation and the high-brightness operation respectively reaches the rated value by accepting or rejecting R3-R5, R7 and R8, and the output voltage value of the voltage-stabilized power supply reaches the rated value by matching with the tubes with different parameters of D6 and D7. The machine shell of the machine is formed by plastic injection molding.

The utility model has the advantages that: the battery is used instead of a storage battery, and the battery has the advantages of easiness in purchasing, low price, less pollution, less maintenance, smaller power transformer, simpler stabilized voltage supply, smaller product volume, lighter weight, lower cost and selling price and the like; the automatic conversion of the AC/DC power supply state is realized by only one isolating diode D9, so that a conversion switch or a relay is omitted, the battery can be charged in time, and the operation is simple and convenient when the battery is used; the constant voltage power supply charges the battery at a constant voltage, so that the battery can be charged to an optimal final voltage value without overcharge (including battery heating) and undercharge, the service life of the battery can be greatly prolonged, and the battery updating cost of a user is greatly reduced; the fluorescent lamp converter adopts an intermittent oscillator, so that the output peak voltage is high, the trigger power to the fluorescent lamp tube is large, the starting performance is good, even if filaments at two ends of the lamp tube are all broken, the starting and the running can still be realized, and the service life of the lamp tube is prolonged; two-gear dimming is realized, and two requirements of lamp brightness and battery life are met; in the fluorescent tube operated by direct current, the temperature of the filament at the positive terminal is lower than that of the filament at the negative terminal, and the defect of great difference of brightness at the two terminals can occur when the fluorescent tube is operated at low temperature, the YG filament at the positive terminal can be prevented by electrifying and heating the filament by using N4 in the attached drawing, and after the light is stable or the temperature is high, the filament switch, namely the key type single-pole double-throw switch Kc is used for cutting off and connecting the two leading-out pins of the filament in parallel so as to eliminate the negative influence of the filament on the starting performance; the circuit design considers the batch production of factories and designs the printed circuit board according to the batch production, thereby creating conditions for direct production of patent implementation factories.

In the drawing, if a 6W straight fluorescent lamp tube (YZ 6 type made by China) is adopted for YG, the full-running luminous flux of the YG is more than enough for a desk lamp, the half-running luminous flux of the YG is also larger than that of an 8W or 4W straight fluorescent lamp tube, the electro-optic conversion rate is highest, the effect is best, DC is formed by connecting 8 batteries with 1 battery in series, and the conditions that a prototype assembled according to the two points is matched with the 1 common zinc-manganese battery are shown in tables 1 and 2.

Table 1 (Small brightness operation)

№	Run time, hour	Turning on the light	0.5	1.0	1.5	2.0	2.5	Note that
									1	Operating current, mA	301	286	271	271	261	250	The air temperature is 15 DEG C After 4 days, the sample No. 2 is put
Voltage of battery, V	10.2	9	8.55	8.2	7.85	7.5
							2	Operating current, mA		306	294	290	278	250	242	Pre-charge air temperature before start At 20 deg.c. After finishing charging No. 3 at 14 hours
Voltage of battery, V	11.7	9.9	9.25	8.8	8	7.6
								3	Operating current, mA	301	301	294	285	267	220		Air temperature19℃。
Voltage of battery, V	11.9	9.6	9.1	8.55	7.75	7.3

Table 2 (high brightness operation)

№	Run time, hour	Turning on the light	0.5	1.0	1.5	Injection bottle
							1	Operating current, mA	590	550	530	475	Air temperature 18.5 ℃. After the end of charging for 2 hours No. 2
Voltage of battery, V	9.9	7.9	7.2	6.4
					2	Operating current, mA		600	540	490	420	The air temperature was 19 ℃. After the end of charging for 2 hours Run through No. 3
Voltage of battery, V	10.9	8.1	7	6
						3	Operating current, mA	650	553	500	400		Air temperature 18.5 ℃.
Voltage of battery, V	11	8.15	6.7	5.75

The data in the table show that the YH operating current has a smaller drop when the battery voltage is greatly reduced, i.e., the lamp power is reduced a little, which is very practical, and if the YH operating current is also greatly reduced along with the battery voltage, the lamp power and the lamp brightness are reduced to a greater extent, even to a level that is unacceptable to the user; the battery is used for three times, the surface of each battery is still as new when the battery is used, and the battery can be used for a plurality of times by combining charging, so that the constant-voltage charging can urgently prolong the service life of the battery, and the battery updating cost of a user is reduced to a very low degree; in a word, the utility model discloses a practicality is stronger, and the technique is more mature.

Claims

1. A fluorescent lamp powered by a battery or a battery and charging the battery with a constant voltage comprises a stabilized voltage power supply, a battery pack (DC), a fluorescent desk lamp, a shell and the like, wherein the stabilized voltage power supply comprises a power plug, a power line, a power transformer (B1), a fuse (RD 1) connected in series with the stabilized voltage power supply, rectifiers (D1-D4), a filter electrolytic capacitor (C1) and a linear working series stabilized voltage power supply circuit which are connected in series in sequence, the linear working series stabilized voltage power supply circuit comprises a voltage adjusting tube (Q2) connected in series between the output ends of the rectifiers (D1-D4) and the battery pack (DC) and a current amplifying tube (Q1) connected with the voltage adjusting tube in series with the voltage adjusting tube, the base electrode of the current amplifying tube (Q1) obtains stable voltage from a diode voltage stabilizing circuit consisting of a resistor (R1), a forward conducting diode (D5) and a stable diode in a reverse breakdown state which are connected in parallel with the output ends of the rectifiers (D1-D4), the output end of the voltage stabilizing circuit is connected with a series branch of the resistor and the light emitting diode (R2 and D8) in parallel and is also connected with an isolating diode (D9) in series for conducting the output current in the forward direction and then is connected with the battery pack (DC) in parallel, the battery pack (DC) adopts a No. 1 common zinc-manganese battery or a high-energy battery or a large-capacity battery with the same size, and the fluorescent desk lamp comprises a lamp switch, a fluorescent lamp converter (YH), a fluorescent lamp tube (YG) and a tube seat thereof, a tube seat, a tube, and a tube, lampshade, soft stalk of metal, fluorescent lamp converter (YH) adopt high-frequency transformer feedback, oscillating tube (Q3) base RC timed parallel auto-excitation type single tube intermittent oscillator, its oscillating tube (Q3) adopts NPN type triode, its oscillating transformer (B2) adopts ferrite core, the parallelly connected electrolytic capacitor (C2) of its positive negative pole, group battery (DC) and fluorescent lamp converter (YH) between, concatenate fuse (RD 2) and lamp switch (Ka), the utility model is characterized in that-

The voltage stabilizing diode in a reverse breakdown state in the diode voltage stabilizing circuit is formed by connecting two voltage stabilizing diodes (D6 and D7) in series;

the circuit of the fluorescent lamp converter (YH) is that-the oscillating transformer (B2) has four windings in total, a primary winding (N1) and a positive feedback winding (N2) are respectively connected with a collector circuit and a base circuit of the oscillating tube (Q3), the fluorescent tube winding (N3) is connected with filaments at two ends of the fluorescent tube (YG), the filament winding (N4) is connected with a filament switch (Kc) and then connected with a filament at one end of the fluorescent tube (YG), wherein the primary winding (N1), the filament winding (N4) and the fluorescent tube winding (N3) are sequentially connected in series, namely continuously wound in the same direction and tapped for two, the positive feedback winding (N2) has a tap, and two leading-out pins of the filament at one end of the fluorescent tube (YG) which is not connected with the filament winding (N4) are connected in parallel for use, the metal soft stem of the fluorescent desk lamp is connected with the positive electrode of a power supply, the emitting electrode of the oscillating tube (Q3) is connected with the negative electrode of the power supply, a bias current resistor (R3-R5) formed by connecting three resistors in series is connected between the base electrode and the positive electrode of the power supply, a series circuit of a reverse parallel diode (D10) between the base electrode and the emitting electrode, a timing capacitor (C3), a timing resistor (R6) and a positive feedback winding (N2) is connected between the base electrode and the positive electrode of the oscillating tube in series, the lamp switch adopts a double-pole three-throw switch (Ka + Kb) to serve as a power switch (Ka) and two-gear dimming (Kb), the positions of the double-pole three-throw switch are arranged in turn of lamp turning off, high brightness and low brightness, and the high brightness position or the low brightness position is respectively connected with all or one of the positive feedback winding (N2) by the switch (Kb) And two resistors (R7 and R8) are also connected in series with a plurality of turns, the filament switch (Kc) adopts a key-type single-pole double-throw switch, and the two positions of the switch are respectively that the filament winding (N4) is connected with two leading-out pins of a filament at one end of the fluorescent tube (YG) or the two leading-out pins are connected in parallel.

2. The AC/Battery fluorescent lamp of claim 1, wherein said battery pack (DC) is formed by connecting 8 No. 1 batteries in series, and said fluorescent lamp (YG) is a 6W straight fluorescent lamp.