CN2472452Y - High performance and cheap emergent lamp for fire control - Google Patents

Abstract

The utility model discloses a high-performance and low-cost fire-fighting emergency lamp, which includes a power supply circuit, an over-discharge protection circuit, an oscillation circuit and other circuits, and is characterized in that it also includes a working state conversion circuit, a charging circuit with protection and detection display. The utility model is also designed with a lamp tube preheating starter circuit. The utility model has the functions of anti-overcharge protection, short circuit protection, temperature compensation, and overdischarge protection, and can automatically switch between the constant state and the emergency state. Compared with similar products, the circuit is simpler, the components are less, the cost is lower, and the reliability is higher. High, product performance can fully meet and partly exceed the new national standard, to meet the needs of fire and family emergency lights.

Description

High-performance low-cost fire emergency lights

The utility model relates to a lamp, in particular to a fire emergency lamp with high performance and low cost.

Fire emergency lights are lamps and lanterns used to provide signs and lighting for evacuation when a fire breaks out in a building. It is a necessary product for high-rise buildings such as hotels, hotels, and office buildings. The Fire Department of the Ministry of Public Security has issued a new national standard to adapt to the new situation ( GBI7945-2000). Most of the existing fire emergency lights do not meet this standard, and some have no under-voltage identification and working state conversion circuits; some have anti-overcharge protection circuits, but no temperature compensation circuits, and the battery cannot change with temperature changes. Getting enough electricity makes the battery not effectively protected and shortens the life of the battery; some use multiple triodes or integrated circuits as the main device, the circuit is complicated and the cost is high.

The purpose of this utility model is to provide a high-performance and low-cost fire-fighting emergency light, which can realize the automatic conversion between the normal state and the emergency state, and has anti-overcharge protection, short circuit protection, temperature compensation, over-discharge protection and preheating start-up Function, simple circuit, high reliability, in line with new national standards.

The purpose of this utility model is achieved in that the utility model includes a power supply circuit, a storage battery, an over-discharge protection circuit, an oscillation circuit and a light source circuit, and is characterized in that it also includes a working state conversion circuit, a charging circuit with protection and detection display.

The utility model is also designed with a lamp tube preheating starter circuit.

The charging circuit with protection and detection display of the utility model can cut off the charging current when the storage battery is charged to the maximum allowable value or the storage battery is short-circuited, thereby protecting the storage battery. Since the maximum charging voltage of the battery will change with the temperature, the temperature control resistor can automatically adjust the overcharge protection voltage with the temperature change, so that the battery can always be charged to the optimum value at any temperature, thus improving the charging and protection effect. Extend battery life. The working state conversion circuit can automatically switch to the emergency state when the mains is undervoltage or power failure, and the lights automatically return to normal work after the mains is normal, so as to meet the fire protection requirements. The preheating and starting circuit of the lamp tube can increase the service life of the lamp switch by 4-5 times, and make the starting of the slender lamp tube more effective. The utility model can realize the automatic conversion between the constant state and the emergency state. Compared with similar products, the circuit is simpler, the components are less, the cost is lower, and the reliability is higher. It is very suitable for high-rise buildings such as hotels, hotels, and office buildings, as well as for families and general workplaces.

Fig. 1 is the schematic circuit diagram of embodiment 1;

Fig. 2 is the schematic circuit diagram of embodiment 2;

FIG. 3 is a schematic circuit diagram of Embodiment 3.

Below in conjunction with embodiment and with reference to accompanying drawing, the utility model is described in further detail.

Example 1:

The power supply circuit of the utility model is composed of fuse F1, transformer B1, diodes D1 and D2, which can output a DC voltage of more than ten volts after stepping down and rectifying the 220V commercial power to provide power for other circuits.

The charging circuit with protection and detection display consists of thyristor KG, triode Q1, Q2, diodes D3-D6, voltage regulator diodes W1, W3, W4, red light-emitting diode LED1, green light-emitting diode LED2, yellow light-emitting diode LED3, temperature control Composed of resistor R12, resistor R1-R6, R9-R11, resistor R5 is connected in series between the cathode of diode D1 and the anode of diode D3, diodes D3, D4, D5 are connected in series in forward direction, and the cathode of diode D5 is connected to the thyristor KG The anode of the thyristor KG, the cathode of the thyristor KG and the fuse F2 are connected in series to the positive pole of the battery E, the negative pole of the battery E is grounded, the control pole of the thyristor KG is connected to the collector of the triode Q2, and the emitter of the triode Q2 is connected to the thyristor KG The cathode of the diode, the base and the resistor R6 are connected in series to the anode of the Zener diode W1, the cathode of the Zener diode W1 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the cathode of the diode D1, and the resistor R4 is connected to the cathode of the diode D4 and the anode of D5 The other end is connected to the cathode of the thyristor KG; the resistor R9 is connected in series between the cathode of the diode D1 and the cathode of the zener diode W3, the anode of the zener diode W3 is grounded, and one end of the resistor R10 is connected to the zener diode W3 Cathode, the other end is connected in series with resistor R11 and temperature control resistor R12 in turn, and then grounded. The common end of resistor R10 and R11 is connected to the control electrode of thyristor KG; one end of R2 is connected to the cathode of thyristor KG, and the other end is connected to Zener diode W4 The cathode of the Zener diode W4 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the cathode of the light-emitting diode LED3 in series with the resistor R3, the emitter is grounded, and the anodes of the light-emitting diodes LED1 and LED3 are connected to the anode of the diode D3 , the cathode of the light-emitting diode LED1 is connected to the anode of the thyristor KG, one end of the resistor R1 is connected to the anode of the diode D2, the other end is connected to the anode of the light-emitting diode LED2, and the cathode of the light-emitting diode LED2 is grounded.

The working state conversion circuit is composed of triode Q3, Zener diode W2, relay J, double set of contacts J1, J2, diode D7, resistors R7, R8, and polar capacitors C1-C3, in which the anodes of capacitors C1 and C2 are connected to diode D6 The cathode of the capacitor C1 is grounded, the negative electrode of the capacitor C2 is connected to the collector of the transistor Q3 and the common terminal of the cathode of the diode D7, the coil of the relay J is connected in parallel to both ends of the capacitor C2, the anode of the diode D7, the emitter of the transistor Q3, The negative poles of capacitor C3 are grounded, resistor R8 is connected in parallel between the base of transistor Q3 and the ground, the positive pole of capacitor C3 is connected to the base of transistor Q3, the cathode of Zener diode W2 is connected to the cathode of diode D6, and the anode is connected in series with resistor R7 Connect to the base of the triode Q3, the middle contact 2 of the contact point J1 is connected to the electrode 10 of the lamp Y, the normally closed contact 1 is connected to one end of the capacitor C10, the normally open contact 3 is connected to the L pin of the electronic ballast YZ, and the terminal of J2 The middle contact 5 is connected to the cathode of the diode D10 and the common end of the electrode 7 of the lamp Y, the normally closed contact 4 is connected to one end of the secondary coil of the transformer B2 and the common end of the emitter of the triode Q5, and the normally open contact 6 is connected to C pin of electronic ballast YZ.

The over-discharge protection circuit is composed of transistors Q4, Q5, diodes D8, D9, polar capacitors C4, C5, C6, and resistors R13-R16.

The lamp preheating and lighting circuit is composed of triode Q6, Q7, polar capacitor C7, capacitor C8, and resistors R17-R19. One end of R19 is connected to the collector of triode Q5, and the other end is connected to the collector of triode Q6 and the base of triode Q7. The common terminal, the emitters of the triode Q6 and Q7 are grounded, the collector of the triode Q7 is connected to the anode of the diode D11 and the common terminal of an electrode 8 of the fluorescent tube Y, the capacitor C8 is connected in parallel between the base of the triode Q7 and the ground, and the resistor R18 is connected in parallel between the base of the transistor Q6 and the ground, the anode of the polar capacitor C7 is connected to the base of the transistor Q6, and the negative is grounded, one end of the resistor R17 is connected to the base of the transistor Q6, and the other end is connected to the collector of the transistor Q5.

The oscillating circuit is a push-pull circuit composed of transformer B2, transistors Q8, Q9, capacitors C9, C10, resistors R20, R21, and inductor L1.

The light source circuit is composed of lamp tube Y, electronic ballast YZ, diodes D10 and D11.

The test switch SK is connected in parallel between the base of the transistor Q3 and ground.

One end of switch K is connected to the live wire of mains 220V, and the other end is connected to the live wire input end of electronic ballast YZ. This switch can make the utility model as a daily lighting lamp, but can not shut off emergency work. The normally closed contacts of contacts J1 and J2 are in the emergency state, and the normally open contacts are in the normal state.

Constant state:

Connect to the 220V mains, the green light-emitting diode LED2 lights up, indicating that there is a mains. At the same time, because the voltage division value on the resistors R10, R11+R12 (that is, the gate voltage of the thyristor KG) is higher than the cathode voltage of the thyristor KG, the thyristor KG is turned on, and the battery E starts to be charged, and the red light-emitting diode LED1 emits light , indicating that it is charging. When the battery E is fully charged, the cathode voltage of the thyristor KG is close to the control voltage of the thyristor KG, and the thyristor KG is turned off to stop charging.

When the charging circuit is short-circuited, the emitter of the triode Q2 is grounded, and the triode Q2 is also saturated and turned on. Oversized and burned.

Because the maximum charge value allowed by battery E decreases with the rise of ambient temperature, when the voltage of battery E is charged to the allowable value, the gate voltage of thyristor KG is affected by the resistance R10, The partial voltage of R11 and R12 is limited and cannot be triggered, and the thyristor KG is turned off to stop charging. When the temperature rises, the resistance value of the resistor R12 decreases, and the gate voltage of the thyristor KG also decreases; otherwise, the temperature rises, and the gate voltage of the thyristor KG rises, thereby playing a compensation role.

When the mains is at a normal value, the Zener diode W2 and the triode Q3 are turned on, the relay J is pulled in, the contacts J1 and J2 are pulled to the normally open contacts, and the lamp Y is lit up under the action of the electronic ballast YZ .

Emergency status:

When the city power is undervoltage or power failure, the Zener diode W2 and the transistor Q3 are cut off, the relay J is released, the contacts J1 and J2 are pulled to the normally closed contacts, the battery E starts to discharge, and the capacitor C6 is charged through the diode D10, and the transistors Q4 and Q5 Turn on, output voltage to the oscillating circuit, control and keep the oscillating circuit working, at the same time, the battery E is added to the transformer B2 through the inductance L1, so that the oscillating circuit starts to vibrate, and after being boosted by the transformer B2, it is added to the lamp Y, so that the lamp Y starts glow glow. While the working state conversion circuit is working, the lamp preheating and starting circuit starts to work, the triode Q7 is turned on for a short time, and the current flows through the filament between the electrodes 8 and 7 of the lamp Y to preheat the filament, and the lamp After Y is ignited, the triode Q6 is turned on, and the triode Q7 is cut off, stopping heating the filament.

The voltage regulator tube W2 can identify the mains voltage to ensure that the working state conversion circuit will only switch to emergency work when the mains is undervoltage or power failure. Once the commercial power is normal, the working state switching circuit immediately returns to the normal working state.

When the voltage of the battery E drops to the specified value, the base current of the transistor Q4 drops, the transistors Q4 and Q5 are cut off, the oscillating circuit stops working because of no bias voltage, the lamp Y goes out, and the transistors Q4 and Q5 are over-discharged. The role of protection.

Example 2:

The circuit of embodiment 2 is basically the same as that of embodiment 1, except that: one end of the switch K is grounded, and the other end is connected to the emitter of the transistor Q3. After the switch K is turned on, the light can be turned on regardless of whether the mains power is normal or not; when the switch K is turned off, the triode Q3 and Q4 cannot be turned on because of the open circuit, so that the light cannot be turned on in normal and emergency conditions, realizing One switch can control both normal and emergency states at the same time. Similar products generally do not have this function, and some use two switches to realize this function.

Example 3:

The storage battery E, the over-discharge protection circuit, the charging circuit with protection and detection display, and the working state switching circuit of the third embodiment are the same as those of the first embodiment.

The difference is:

The power supply circuit is composed of fuse F1, transformer B1, diodes D1, D2, D12, voltage stabilizing integrated circuit IC, inductor L2, resistors R22, R23.

The oscillating circuit is composed of transistors Q10, Q11, Q12, transformer B3, diode D13, polar capacitors C11, C12, capacitors C13, C14, and resistors R24-R28.

The light source circuit is an electroluminescence screen P.

The middle contact 2 of the contact J1 of the relay J is connected to the collector of the transistor Q11, the normally open contact 1 is connected to the cathode of the diode D12, and the normally closed contact 3 is connected to the emitter of the transistor Q5. The normally open contact is in the normal state, and the normally closed contact is in the emergency state.

The three contacts of the contact J2 are empty.

Claims (2)

1, a kind of high-performance and low-cost fire emergency lamp, comprise power circuit, storage battery (E), the over circuit, oscillating circuit and circuit of light sources, it is characterized in that: also comprise the operating state change-over circuit, charging circuit and operating state that band protection and detection show detect display circuit, wherein the operating state change-over circuit is by triode (Q3), voltage stabilizing didoe (W2), relay (J) and amphinucleus point (J1, J2), diode (D7), resistance (R7, R8), polar capacitor (C1-C3) form, electric capacity (C1, C2) positive pole all connects the negative electrode of diode (D6), the minus earth of electric capacity (C1), the negative pole of electric capacity (C2) connects the collector electrode of triode (Q3) and the common port of diode (D7) negative electrode, the coils from parallel connection of coils of relay (J) is at the two ends of electric capacity (C2), the anode of diode (D7), the emitter of triode (Q3), the equal ground connection of negative pole of electric capacity (C3), resistance (R8) is connected in parallel between the base stage and ground of triode (Q3), the positive pole of electric capacity (C3) connects the base stage of triode (Q3), the negative electrode of voltage stabilizing didoe (W2) connects the negative electrode of diode (D6), anode and the base stage that meets triode (Q3) after resistance (R7) is connected, the intermediate contact (2) of contact (J1) connects the electrode (10) of fluorescent tube (Y), normally-closed contact (1) connects an end of electric capacity (C10), normally opened contact (3) connects (L) pin of electric ballast (YZ), (J2) intermediate contact (5) connects the common port of the electrode (7) of the negative electrode of diode (D10) and fluorescent tube (Y), normally-closed contact (4) connects the common port of the emitter of the end of secondary coil of transformer (B2) and triode (Q5), and normally opened contact (6) connects (C) pin of electric ballast (YZ); The charging circuit that band protection and detection show is by controllable silicon (KG), triode (Q1, Q2), diode (D3-D6), voltage stabilizing didoe (W1, W3, W4), red light emitting diodes (LED1), green LED (LED2), yellow light-emitting diode (LED3), temperature resistance (R12), resistance (R1-R6), (R9-R11) form, wherein resistance (R5) is connected between the anode of the negative electrode of diode (D1) and diode (D3), diode (D3, D4, D5) forward series connection successively, the negative electrode of diode (D5) connects the anode of controllable silicon (KG), the negative electrode of controllable silicon (KG) and the positive pole that meets storage battery (E) after fuse (F2) is connected, the minus earth of storage battery (E), the control utmost point of controllable silicon (KG) connects the collector electrode of triode (Q2), the emitter of triode (Q2) connects the negative electrode of controllable silicon (KG), base stage and the anode that meets voltage stabilizing didoe (W1) after resistance (R6) is connected, the negative electrode of voltage stabilizing didoe (W1) connects the negative electrode of diode (D6), the anode of diode (D6) connects the negative electrode of diode (D1), resistance (R4) terminating diode (D4) negative electrode and (D5) common port of anode, the negative electrode of another termination controllable silicon (KG); Resistance (R9) is connected between the negative electrode of the negative electrode of diode (D1) and voltage stabilizing didoe (W3), the plus earth of voltage stabilizing didoe (W3), the negative electrode of one termination voltage stabilizing didoe (W3) of resistance (R10), ground connection after the other end is connected with resistance (R11), temperature resistance (R12) successively, the control utmost point of the public termination controllable silicon (KG) of resistance (R10, R11); (R2) negative electrode of a termination controllable silicon (KG), the negative electrode of another termination voltage stabilizing didoe (W4), the anode of voltage stabilizing didoe (W4) connects the base stage of triode (Q1), the negative electrode of sending and receiving optical diodes (LED3) after the collector electrode of triode (Q1) is connected with resistance (R3), grounded emitter, light-emitting diode (LED1, LED3) anode all connects the anode of diode (D3), the negative electrode of light-emitting diode (LED1) connects the anode of controllable silicon (KG), the anode of one terminating diode (D2) of resistance (R1), the anode of other end sending and receiving optical diode (LED2), the minus earth of light-emitting diode (LED2).

2, high-performance and low-cost fire emergency lamp as claimed in claim 1, it is characterized in that: also design has the fluorescent tube preheating starting circuit, it is by triode (Q6, Q7), polar capacitor (C7), electric capacity (C8), resistance (R17-R19) form, the collector electrode of (R19) termination triode (Q5) wherein, the common port of another termination triode (Q6) collector electrode and triode (Q7) base stage, triode (Q6, Q7) the equal ground connection of emitter, the collector electrode of triode (Q7) connects the common port of an electrode (8) of the anode of diode (D11) and fluorescent tube (Y), electric capacity (C8) is connected in parallel between the base stage and ground of triode (Q7), resistance (R18) is connected in parallel between the base stage and ground of triode (Q6), the positive pole of polar capacitor (C7) connects the base stage of triode (Q6), minus earth, the base stage of resistance (R17) termination triode (Q6), the collector electrode of another termination triode (Q5).

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