CN201323696Y - Emergency lamp - Google Patents

Abstract

The utility model discloses an emergency lamp, comprising a rectifier charging circuit, a storage battery, a relay circuit, an inverter circuit, a ballast, a lighting tube and a delay switch circuit. The rectifier charging circuit is respectively connected with the storage battery and the relay circuit; the moving contact of a relay in the relay circuit is connected with the lighting tube and is used for controlling the lighting tube to be connected with the ballast or controlling the lighting tube to be connected with the output end of the inverter circuit; and the delay switch circuit is respectively connected with the rectifier charging circuit, the storage battery and the inverter circuit, and is used for shutting off the power supply of the inverter circuit when commercial power is normal and turning on the power supply of the storage battery to the inverter circuit when the commercial power is shut off after delaying a second predetermined time. The emergency lamp can lead the relay to be operated under the state of no high-pressure load and avoids the phenomenon of voltaic arc dragging when the state of the relay is converted, thereby improving the service life of the relay, ensuring the emergency lamp to be efficiently operated, and effectively improving the product quality.

Description

an emergency light

technical field

The utility model relates to a lamp, in particular to an emergency lamp for reminding and illuminating.

Background technique

At present, the principle of the known emergency light circuit for lighting is shown in FIG. Normally, the emergency light is connected to 220V mains power, the rectification and charging circuit charges the battery 12, so that the battery 12 is in a fully charged standby state, the relay 13 is in a disconnected state, and the ballast 15 communicates with the lamp tube 16 to make the lamp tube 16 emit light It is in a normal lighting state, but the inverter circuit 14 for emergency does not work. When there is a sudden power failure, the relay 13 is closed, and the lamp tube 16 is connected to the output end of the inverter circuit 14 as the load of the inverter circuit 14, and the storage battery 12 provides power to the inverter circuit 14 to make the inverter circuit 14 work, and the inverter circuit 14 It supplies power for the lamp tube 16 to emit light, and plays the role of emergency lighting. The prior art has the following disadvantages: 1. Since the relay 13 is in the disconnected state at ordinary times, it is in the closed state in an emergency, which consumes the energy of the battery 12; 2. When the relay 13 of the conventional emergency product jumps to the emergency working state, due to If the high voltage on the ballast 15 does not disappear, an electric arc phenomenon will occur when the relay 13 switches, which will easily cause damage to the relay 13 .

Therefore, the prior art still needs to be improved and developed.

Utility model content

The purpose of this utility model is to provide an emergency light circuit for reminding and lighting. When the relay in the emergency light circuit operates, it can avoid the high-voltage load condition, so the service life of the relay can be improved, thereby ensuring the effective operation of the emergency light.

The technical solution adopted by the utility model for solving the problems of the technologies described above is:

An emergency light, comprising: a rectification and charging circuit, a storage battery and a relay circuit respectively connected to the rectification and charging circuit, an inverter circuit, a ballast and a lamp tube, the movable contact of the relay in the relay circuit and the lamp tube It is used to control the lamp tube to connect with the ballast or connect with the output terminal of the inverter circuit; wherein: a delay switch circuit is also included, and the delay switch circuit is respectively connected with the rectifier The charging circuit, the battery and the inverter circuit are connected, and are used to cut off the power supply of the inverter circuit when the mains power is normal, and to connect the battery to the inverter circuit after a delay of a second predetermined time when the mains power is cut off. powered by.

The emergency light, wherein: the relay circuit further includes a third delay capacitor connected in parallel with the relay, the third delay capacitor is used to delay the pull-in of the relay, and delay the first predetermined time reset.

The emergency light, wherein: the second predetermined time is greater than twice the first predetermined time.

The emergency light, wherein: the normally open contact of the relay is connected to the ballast, and the ballast is connected to the lamp tube when the relay is in the pull-in state; the normally closed contact of the relay It is connected with the output terminal of the inverter circuit, and the output terminal of the inverter circuit is connected with the lamp tube when the relay is in a reset state.

The emergency light, wherein: the delay switch circuit includes:

The first, second, third and fourth switch tubes, the second delay capacitor, the third regulator tube for providing a comparison voltage, and resistors R6, R7, R8, R16, R10, R2, R3, the The second, third and fourth switching tubes are NPN switching tubes, and the first switching tube is PNP switching tube;

Resistor R10 is connected in series with the second delay capacitor, the other end of the second delay capacitor is grounded, and the other end of resistor R10 is connected to the output terminal of the rectification and charging circuit; resistor R8 is connected in parallel with the second delay capacitor after being connected in series with R16; the third The positive pole of the voltage regulator tube is connected to the node of resistors R8 and R16, the negative pole is connected to the node of resistors R6 and R7, the other end of resistor R6 is grounded, and the other end of resistor R7 is connected to the base of the fourth switching tube; the fourth switching tube The collector of the first switch is connected to the other end of the resistor R10, its emitter is connected to the base of the third switch tube, and the collector of the third switch tube is connected to the base of the second switch tube; the collector of the first switch tube is connected to the base of the second switch tube through the resistor R2 The base of the second switching tube is connected to the input terminal of the inverter circuit, its base is connected to the collector of the second switching tube through a resistor R3, and its emitter is connected to the positive pole of the storage battery.

The beneficial effects of the utility model are: because the emergency light adopts a switch delay circuit and a third delay capacitor connected in parallel with the relay, the relay can be operated without a high-voltage load, and no arc will be generated when the relay working state is switched. phenomenon, thereby improving the service life of the relay, ensuring the effective operation of the emergency light, and effectively improving the product quality; at the same time, because the relay is in the closed state when the mains power supply is normal, it is in the reset state when the mains power is cut off. Therefore, the energy of the storage battery is saved.

Description of drawings

Fig. 1 is the functional block diagram of prior art emergency light circuit;

Fig. 2 is the functional block diagram of the utility model emergency light circuit;

Fig. 3 is a circuit diagram of an embodiment of the utility model emergency light.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail:

As shown in Figure 2, the emergency lamp of the present utility model comprises: rectification charging circuit 21, the storage battery 22 that is connected with rectification charging circuit 21 and relay circuit 23 respectively, and inverter circuit 24, ballast 25 and lamp tube 26 (LAMP ), the moving contact of the relay in the relay circuit 23 is connected with the lamp tube 26, its normally open/normally closed contact is connected with the ballast 25, and its normally closed/normally open contact is output with the inverter circuit 24 terminal connection, the relay circuit 23 is used to control the on-off of the lamp tube 26 and the output terminal of the ballast 25 and the inverter circuit 24 . Differences from the prior art: 1. It also includes a delay switch circuit 27, which is connected to the rectifier charging circuit 21, the storage battery 22 and the inverter circuit 24 respectively, and is used to cut off the storage battery when the commercial power 220V is normal. 22. The power supply to the inverter circuit 24 makes the inverter circuit 24 not work. At this time, the relay circuit 23 controls the lamp tube 26 to communicate with the ballast 25, and the lamp tube 26 is normally illuminated; when the mains power is cut off, the delay switch circuit 27 After delaying the second predetermined time H2, connect the battery 22 to the power supply of the inverter circuit 24, so that the inverter circuit 24 is transferred to the working state. The output end of the transformer circuit 24 is connected, and the inverter circuit 24 outputs high voltage to the lamp tube 26, so that the lamp tube 26 works in an emergency. 2. The relay circuit 23 also includes a third delay capacitor connected in parallel with the relay. The third delay capacitor is used to delay the pull-in of the relay and reset after a delay of the first predetermined time H1, and 2×H1<H2. Because when the mains power is cut off, the relay resets after a delay of H1, and the delay switch circuit 27-delays the H2 time before connecting the power supply of the storage battery 22 to the inverter circuit 24, therefore, it can be guaranteed that the relay does not have a high-voltage load Action under certain conditions, thereby improving the service life of the relay and improving the quality of the product.

The utility model also arranges that the normally open contact of the relay is connected with the ballast 25, and the normally closed contact is connected with the output terminal of the inverter circuit 24. When the mains 220V is normally powered, the relay is in the pull-in state, so that The ballast 25 is connected with the lamp tube 26, and when the mains power is cut off, the relay is in the reset state after a delay of H1 time, so that the output terminal of the inverter circuit 24 is connected with the lamp tube 26. The emergency lighting is in the reset state, so the energy of the storage battery 22 is saved.

The utility model can be realized by adopting various circuit structures, one of which is shown in FIG. 3 . Wherein, the delay switch circuit 27 includes switch tubes Q1, Q2, Q3, Q4, a third regulator tube D3 for providing a comparison voltage, a second delay capacitor C2, and resistors R6, R7, R8, R16, R10, R2 , R3, wherein the switching tubes Q2, Q3, and Q4 are NPN switching tubes, and the switching tube Q1 is a PNP switching tube. The relay circuit 23 includes a transistor Q5, a relay L1, and a third delay capacitor C3 connected in parallel to both ends of L1. The inverter circuit 24 includes transistors Q6, Q7, a transformer T2, capacitors C5, C6. The connection relationship of each component is shown in Figure 3, and its working principle is as follows:

Under the normal power supply state of 220V mains, AC220V is stepped down by transformer T1, rectified by rectifier BG1, and then output to 6V battery for charging through diode D1, and at the same time, power is supplied to relay L1 through switch tube Q5 in relay circuit 23, so that relay L1 is in the pull-in state. At this time, the normally open contacts K3, K4, K5 and K6 of the relay L1 are closed, the lamp tube 26 (LAMP) is connected to the ballast 25, and both the lamp tube 26 and the ballast 25 work normally. Another branch output by the rectification and charging circuit 21 charges the second delay capacitor C2 in the delay switch circuit 27 through the diode D4, and when the voltage of the second delay capacitor C2 rises to the regulator threshold value of the regulator tube D3, The switching tubes Q3 and Q4 are turned on, the switching tube Q2 is turned off and the switching tube Q1 is turned off, and the switching tubes Q6 and Q7 of the inverter circuit 24 have no starting current, so the emergency circuit (ie, the inverter circuit) does not work. After the switch tubes Q3 and Q4 are turned on, the second delay capacitor C2 is discharged through the resistor R10, the switch tubes Q4 and Q3, and the small current of the resistor R10 keeps the switch tube Q3 working.

When the mains 220V stops supplying power, that is, in the emergency state: the relay L1 maintains working for a period of time through the third delay capacitor C3, that is, after the first predetermined time H1, the relay L1 is powered off and is in the reset state, and the normally open contact K3- K6 trips, the ballast 25 is disconnected from the lamp tube 26, the normally open contacts K1 and K2 are closed after the relay L1 is reset, and the connection between the inverter circuit 24 of the emergency part and the lamp tube 26 is connected. At the same time, the second delay capacitor C2 is discharged through the resistors R6, R8, R16, R10, the third regulator tube D3 (the resistance value of R10 can be set to 910K) and the switch tubes Q3 and Q4, etc., and the discharge time is the second predetermined time H2, the second predetermined time H2 is determined by the internal resistances of the second delay capacitor C2, resistors R6, R8, R16, R10, third regulator tube D3, and switch tubes Q3 and Q4. The second predetermined time H2 is the time when the high voltage on the relay L1 disappears, and should satisfy H2>2×H1. When the voltage of the second delay capacitor C2 is discharged to be lower than the threshold value of the third voltage regulator tube D3, the switch tubes Q3 and Q4 are turned off, the switch tube Q2 is turned on and Q1 is turned on, and the voltage of the battery 22 passes through the light switch tubes Q1, Q1, and Q1. Resistors R13 and R14 make the switching tubes Q6 and Q7 of the inverter circuit 24 work, and the high voltage output of the capacitors C5 and C6 is output to the lamp tube 26 for emergency operation. The inverter circuit 24 is an existing mature technology, so it will not be repeated here. Since the relay L1 is processed by the delay time of H1 and H2, it operates under the condition of no high-voltage load, thereby ensuring the service life of the relay L1 and improving the quality of the product. And because the relay L1 is in the reset state during the emergency lighting of the mains power failure, the energy of the storage battery is saved.

It can be understood that, for those skilled in the art, equivalent replacements or changes can be made according to the technical scheme of the utility model and its inventive concept, and all these changes or replacements should belong to the protection scope of the appended claims of the present invention .

Claims (5)

1, a kind of emergency light, comprise: rectifier charging circuit, storage battery and the relay circuit that is connected with described rectifier charging circuit respectively, and inverter circuit, ballast and fluorescent tube, the moving contact of described relay circuit repeat circuit links to each other with fluorescent tube, is used to control that described fluorescent tube and described ballast are connected or connect with described inverter circuit output; It is characterized in that: also comprise a delay switch circuit, described delay switch circuit is connected with described rectifier charging circuit, storage battery and inverter circuit respectively, be used for just often cutting off the power supply of described inverter circuit, and connect of the power supply of described storage battery after second scheduled time of when civil power cuts off the power supply, delaying time inverter circuit at civil power.

2, emergency light according to claim 1 is characterized in that: described relay circuit also comprises three delay capacitor in parallel with relay, and described the 3rd delay capacitor is used to make described relay time-delay adhesive, and resets after first scheduled time of delaying time.

3, emergency light according to claim 1 and 2 is characterized in that: described second scheduled time is greater than described first scheduled time of two times.

4, emergency light according to claim 3 is characterized in that: the normally opened contact of described relay is connected with described ballast, and described ballast linked to each other with fluorescent tube when described relay was in attracting state; The normally-closed contact of described relay is connected with described inverter circuit output, and described inverter circuit output linked to each other with described fluorescent tube when described relay was in reset mode.

5, emergency light according to claim 4 is characterized in that: described delay switch circuit comprises:

The first, second, third and the 4th switching tube, second delay capacitor is used to provide the 3rd voltage-stabiliser tube of comparative voltage, and resistance R 6, R7, R8, R16, R10, R2, R3, described second, third and the 4th switching tube are NPN type switching tube, and first switching tube is the positive-negative-positive switching tube;

Resistance R 10 is connected with second delay capacitor, the other end ground connection of second delay capacitor, and the other end of resistance R 10 connects described rectifier charging circuit output; It is in parallel after resistance R 8 is connected with R16 with second delay capacitor; The positive pole of the 3rd voltage-stabiliser tube is connected to the node of resistance R 8 and R16, and its negative pole is connected to the node of resistance R 6 and R7, the other end ground connection of resistance R 6, and the other end of resistance R 7 connects the base stage of the 4th switching tube; The other end of the collector electrode connecting resistance R10 of the 4th switching tube, its emitter connects the base stage of the 3rd switching tube, and the collector electrode of the 3rd switching tube connects the base stage of second switch pipe; The collector electrode of first switching tube is connected through the base stage of resistance R 2 with the second switch pipe, and connects the input of described inverter circuit, and its base stage is connected through the collector electrode of resistance R 3 with the second switch pipe, and its emitter connects the positive pole of described storage battery.

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