CN2094143U

CN2094143U - Emergency daylight lamp

Info

Publication number: CN2094143U
Application number: CN91218212U
Authority: CN
Inventors: 陈连旺
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-10
Filing date: 1991-07-10
Publication date: 1992-01-22

Abstract

The utility model relates to an emergency daylight lamp which can light fluorescent lamps of 20-40W, comprising a casing, a battery, a joint element, an electronic circuit and a fluorescent lamp. The charging part adopts a bridge rectifier circuit. The power part adopts the principle of base-collector feed back type intermittent oscillation. Through a switch transistor, a capacitance, two resistors and a purpose-made pulse transformer, intermittent oscillation is realized, causing the output voltage stable. The utility model has the advantages of large power, less power consumption and higher efficiency, applicable to illumination as power cut with higher bright requirement.

Description

Emergency daylight lamp

The utility model relates to a kind of discharge lamp, particularly a kind of Emergency daylight lamp of making power supply with charge inverter.

Emergency light is at the emergent a kind of temporary lighting device that uses of blackout period intercropping, is made up of storage battery, inverter and lighting load usually.Inverter comprises the electronic circuit that direct current is changed into the higher pressure alternating current, and fluorescent lamp is generally adopted in load.Existing emergency light, what adopt is dry cell, and voltage is very low, and power is little, just about the 6-8 volt, only can do general lighting, make the usefulness of " meeting an urgent need " worthy of the name, and most applications in the daily life, be to need reading writing, because of power failure causes interruption, at this moment just do not seemed luminance shortage, the use field of emergency light also just is restricted.

The purpose of this utility model provides a kind of and existing emergency light and compares, power output big (load is the 20-40W fluorescent lamp) and circuit is simple, lower-cost Emergency daylight lamp.

The utility model emergency light is made up of (box) shell, storage battery, connector, electronic circuit, fluorescent lamp.Shell is generally made with insulating material such as flame retardant plastics or three-ply boards, on handle is arranged, storage battery and connector are fixing in the enclosure with securing member.Fluorescent lamp base then is installed on the common backplane on the outer next door of casing.Each electronic devices and components are installed on the connector such as printed circuit board (PCB), and the design of electronic circuits of the utility model emergency light is divided charging and for the discharge two large divisions, connected by change over switch therebetween, adopts base stage one collector electrode feedback-type intermittent oscillation principle.Power rectifier circuit wherein, by 220 volts AC power, electric capacity (C in the connection ₃), be connected to four diode (D that connect by bridge-type ₁, D ₂, D ₃, D ₄), receive storage battery (E) then.Storage battery adopts the plumbous zinc battery (being commonly called as storage battery) of wet type, and its voltage and capacity are high than the employed dry cell batteries of existing emergency light all, and its Ah is big more, and the service time of successively-ignited is also long more.This rectification circuit can also add a charging indication, a last step-down transformer (B by 6V promptly in parallel ₁), resistance (R ₃) and light-emitting diode (D ₆) circuit that is in series.Above-mentioned step-down transformer (B ₁), again as after AC power finishes toward charge in batteries, with (C ₃) remaining a part of alternating current filtering, in order to avoid electric shock.Change electric capacity (C ₃) capacity, charging current is changed.

The power supply circuits part comprises intermittent oscillation circuit and load circuit as shown in drawings.Intermittent oscillation circuit comprises a charge and discharge capacitance (C ₁), a supplying resistance (R ₁), a current-limiting resistance (R ₂), a switch triode (BG ₁), and by L ₁, L ₂L ₃Three transformer (B that winding constitutes ₂), (R ₁) an end and (C ₁) the back ground connection that links to each other, this end while and L ₁The upper end parallel connection, (R ₁) the other end connect L ₂Upper end and ground connection, (R ₂) an end connect L ₁The lower end, the other end connects (BG ₁) base stage, (BG ₁) collector electrode and L ₂The lower end connects, grounded emitter, L ₂The upper end is by change over switch (K ₁) be connected L with storage battery (E) ₁, L ₂, L ₃Internal resistance is than being 0.3:0.025:6.As switch (K ₁) when closing, the power supply of storage battery (E) is through supplying resistance (R ₁) to (BG ₁) base stage supply Dc bias, producing a base current, base current increases gradually, certainly will cause the increase of collector current, and collector current flows through transformer (B ₂) L ₂During winding, at L ₂The pulse induction voltage of bearing just down on the winding two ends produce, and transformer (B ₂) L ₁The winding two ends induce one and go up negative positive induced voltage down, and this induced voltage is to electric capacity (C ₁) charging, and the base stage forward voltage is increased, through current-limiting resistance (R ₂) base current and then increase, collector current further increases, at this moment, L ₂The induced voltage at winding two ends increases, L ₁The winding both end voltage also and then increases, and increases to a certain degree until base current, makes triode saturated and by work.After transistor ends work, L ₁, L ₂Induced voltage equal zero, at this moment, electric capacity (C ₁) discharge to the base stage supplying resistance conversely.Electric capacity (C ₁) discharge off, DC power supply is once more to electric capacity (C ₁) charging, (C ₁) voltage increases gradually, when its voltage increased to the conducting voltage of triode, transistor is conducting again, thereby realizes intermittent oscillation, and output voltage is stablized.Adjust and select suitable (C ₁) capacity and (R ₁) resistance, in the 50HZ scope, and do not disturb other electrical equipment with regard to the adjustable circuit frequency of oscillation.

In addition, add a filter capacitor (C on the circuit ₂), be used for preventing the influence of high frequency parasitic oscillation, thereby increase the stability of circuit circuit performance.Also has load circuit, by (B ₂) L of transformer ₃Winding, diode (D ₅) and a 20-40W fluorescent tube be composed in series.

Transformer (B ₂) be to use the higher FERRITE CORE coiling of permeability, coil L ₁, L ₂, L ₃Every with insulating paper, its internal resistance is than being L around the different numbers of turn, interlayer for the enamelled wire of using collinear footpath not respectively ₁: L ₂: L ₃=0.3:0.025:6.

The emergency light of the utility model design has following advantage:

(1) power output is bigger.No doubt, the voltage of storage battery has increased one times than dry cell batteries, the more important thing is, supply current has obtained amplification through triode, and collector current is about four times of existing emergency light dry cell electric current.The utility model emergency light circuit can be lighted the 20-40W fluorescent lamp, nature, and the brightness of lamp is stronger, can satisfy needs in a big way.

(2) efficient is higher.The design's oscillating circuit can produce long impulse wave of narrow and cycle of width, and the ON time of triode is very short and deadline is long, thereby efficient is very high, can obtain sizable pulse output power under less power consumption.

(3) electronic circuit is simpler, uses electronic devices and components less.

Description of drawings: Fig. 1 is the line map of the utility model emergency light.Fig. 2 is the profile schematic diagram of the utility model emergency light.The 1st, shell, the 2nd, storage battery, the 3rd, connector, the 4th, fluorescent lamp.

Further specify the execution mode of the utility model emergency light below with indefiniteness embodiment:

The AC power of 220V is through (C ₃) and bridge rectifier after toward charge in batteries, (C ₃) usefulness 4-8 μ F fan electric capacity, D ₁, D ₂, D ₃, D ₄Select withstand voltage 1000 volts diode 1N4007 for use.(the R of indicating circuit ₃) with 470 Ω/1/8 W resistance, D ₆Be light-emitting diode.Storage battery adopts 12 volts, the storage battery of 4-5Ah.(the BG of intermittent oscillation circuit ₁) with the switch triode 2SC1061 of HIT, (C ₁) with the above electric capacity of the dacron of 0.02-0.047 μ F, withstand voltage 60V.Resistance (R ₁) be 620 Ω/2W, (R ₂) be the metalfilmresistor of 200 Ω/2W.Filter capacitor (C ₂) with the above electrochemical capacitors of 470 μ F, 16 volts.Transformer (B ₂) with permeability 1400 Gausses' 2E30 FERRITE CORE coiling, L ₁, L ₂, L ₃Three windings are used the enamelled wire coiling of 0.2-0.7mm respectively, coil internal resistance L ₁0.3 Ω, L ₂0.025 Ω, L ₃6 Ω.The D of load circuit ₅Also be diode 1N4007.The rated voltage 12V of battery (E), under the electric sufficient situation of storage, triode (BG ₁) collector voltage be 12V, electric current is at 800-900mA.As (E) when voltage is low to moderate 7.5V, (BG ₁) base voltage will be lower than its conducting voltage, circuit will not worked, and tackle battery (E) and charge this moment, and every charging two hours can be satisfied fluorescent lamp and light one hour needs.

Claims

1, a kind of Emergency daylight lamp is made up of shell, storage battery, connector, electronic circuit and fluorescent lamp, and electronic circuit comprises live part and power pack, it is characterized in that, the power rectifier circuit of live part is connected by power supply goes up electric capacity [C ₃], be connected to four diode [D that connect by bridge-type ₁, D ₂, D ₃, D ₄], receive storage battery [E] then, power pack comprises intermittent oscillation circuit and load circuit, intermittent oscillation circuit comprises an electric capacity [C ₁], a supplying resistance [R ₁], a current-limiting resistance [R ₂], a switch triode [BG ₁], and by L ₁, L ₂, L ₃Transformer [the B that winding constitutes ₂], [R ₁] an end and [C ₁] the back ground connection that links to each other, this end while and L ₁The upper end parallel connection, [R ₁] a termination on L ₂Upper end and ground connection, [R ₂] an end connect L ₁The lower end, the other end connects [BG ₁] base stage, [BG ₁] collector electrode and L ₂The lower end connects, grounded emitter, L ₂The upper end is by change over switch [K ₁] be connected L with storage battery [E] ₁, L ₂, L ₃The internal resistance ratio is 0.3: 0.025: 6, L ₃Winding and diode [D ₅] and fluorescent lamp composition load circuit.

2, emergency light according to claim 1 is characterized in that, charging indication in parallel connection on the power rectifier circuit, and this circuit is by the step-down transformer (B of 6V ₁), series resistance (R ₃) and light-emitting diode (D ₆) form.

3, emergency light according to claim 1 is characterized in that, the L of oscillating circuit ₂The winding upper end, a last filter capacitor (C connects ₂) after ground connection.