CN201733476U

CN201733476U - LED ceiling lamp with emergency function

Info

Publication number: CN201733476U
Application number: CN2010202352248U
Authority: CN
Inventors: 陈泽平; 廖扬成
Original assignee: HANRUN ELECTRONICS CO Ltd
Current assignee: HANRUN ELECTRONICS CO Ltd
Priority date: 2010-06-22
Filing date: 2010-06-22
Publication date: 2011-02-02
Anticipated expiration: 2020-06-22

Abstract

The utility model discloses an LED ceiling lamp with emergency function, which comprises an AC-DC switch power supply, a DC-DC converter, a battery pack, an electronic switch and an LED light source. An electronic switch circuit comprises a battery power supply circuit, a commercial power supply circuit, a voltage comparator circuit and a battery booster circuit. The battery power supply circuit further comprises a rectification filtering circuit and an over-charging protection circuit. As a chargeable battery and the electronic switch with the function of connecting commercial power in a preferred manner are additionally arranged, the utility model can be used as the LED ceiling lamp with emergency function; the electronic switch can be connected with commercial power in a preferred manner to supply power for the LED light source; when such conditions as sudden power failure are incurred, the battery which is well charged in advance can be used for emergency power supply; therefore, the LED ceiling lamp has complete functions and wide application prospect.

Description

The LED ceiling light that possesses emergency function

Technical field

The utility model relates to a kind of ceiling light, especially relates to a kind of LED ceiling light that possesses emergency function.

Background technology

Ceiling light is a kind of lighting device that places on the ceiling, is the equipment of often using in the middle of people's daily life, uses very universal.Ceiling light on the market mostly is light source with the fluorescent tube at present, generally do not possess emergency function, can live to the user because of situation such as powers failure suddenly and bring inconvenience, fire emergency lamp only provides dim light as after having a power failure, can not provide enough light as operate as normal or study, and the emergency light of reality use probability is very little, and the probability that battery damages is also very high, and the practice effect of product is bad.

Summary of the invention

At the problems referred to above, the purpose of this utility model is to provide a kind of and can addresses the above problem, and possesses the LED ceiling light of emergency function.

The utility model is that the technical scheme that its technical problem of solution is adopted is:

A kind of LED ceiling light that possesses emergency function, comprise AC-DC Switching Power Supply, led light source, it is characterized in that: described AC-DC Switching Power Supply is connected with battery pack by the DC-DC converter, and described AC-DC Switching Power Supply is connected with led light source by the electronic switching circuit that preferentially is connected civil power with battery pack.

Further, described electronic switching circuit comprises battery feed circuit, mains-supplied circuit, voltage comparator circuit and battery booster circuit, described battery feed circuit links to each other with voltage comparator circuit with the mains-supplied circuit, described voltage comparator circuit one branch road links to each other with led light source by booster circuit, and another branch road directly links to each other with led light source.

As the further improvement of such scheme, described battery feed circuit also comprises current rectifying and wave filtering circuit and anti-overcharge protective circuit, and described current rectifying and wave filtering circuit is connected with anti-overcharge protective circuit.

The beneficial effects of the utility model are: the utility model is as a kind of LED ceiling light that possesses emergency function, and on the one hand, owing to adopt LED as light emitting source, its irradiation distance is far away, and light intensity is big; On the other hand, because design has increased the preferential detection civil power function of rechargeable battery pack and electronic switch, make the utility model can preferentially select mains-supplied, and its rechargeable battery pack can satisfy the possible period of want or need of unexpected power failure again, therefore, not only practicality but also emergent is that the ideal of life staying idle at home is selected.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described further:

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is the utility model electronic switch theory diagram;

Fig. 3 is the utility model battery feed circuit theory diagram;

Fig. 4 is electronic switching circuit figure of the present utility model.

Embodiment

With reference to Fig. 1, a kind of LED ceiling light that possesses emergency function provided by the utility model, comprise AC-DC Switching Power Supply 1, led light source 2, described AC-DC Switching Power Supply 1 is connected with battery pack 4 by DC-DC converter 3, and described AC-DC Switching Power Supply 1 is connected with led light source 2 by the electronic switching circuit 5 that preferentially is connected civil power with battery pack 4.

As shown in Figure 1, when mains-supplied just often, if outside hand switch disconnects, then AC-DC Switching Power Supply 1 can give battery pack 4 chargings, its basic principle such as following: voltage swing is 100/240V, frequency is that the electric main of 50/60HZ is as input, after AC-DC Switching Power Supply 1, changing voltage swing into is 14V, size of current is the direct current output of 600mA, through the direct current of conversion back output for the first time again as the input of DC-DC converter 3, by becoming voltage swing after the DC-DC conversion is 12.6V, size of current is that the direct current of 100mA gives battery pack 4 chargings, after being full of electricity, its stand-by power consumption is about 1/10th of traditional emergency light less than 0.5W; If outside hand switch closure, then whether electronic switch 5 can to detect mains-supplied automatically normal, selects civil power for led light source 2 then, and this moment, battery pack 4 still was in charged state, if cut off the power supply then circuit can transfer battery pack 4 power supplies automatically to.After the civil power outage, if outside hand switch disconnects, then circuit working is at sleep state, and the stand-by time of its charging after 10 hours can be above 20 days; If outside hand switch closure, then whether the detection mains-supplied is normal automatically for electronic switch 5, selects battery pack 4 power supplies then, and battery pack 4 probably can be kept about 30 minutes under the situation that is full of electricity, if city power recovery when battery pack 4 power supplies, then circuit transfers mains-supplied again automatically to.

As preferred embodiment, the described electronic switching circuit 5 that possesses preferential connection civil power function comprises battery feed circuit 51, mains-supplied circuit 52, voltage comparator circuit 53 and battery booster circuit 54, described battery feed circuit 51 links to each other with voltage comparator circuit 53 with mains-supplied circuit 52, described voltage comparator circuit 53 1 branch roads link to each other with led light source 2 by booster circuit 54, and another branch road directly links to each other with led light source 2.

With reference to Fig. 2, Fig. 4, when commercial power supply, civil power can give rechargeable battery pack 4 chargings by battery feed circuit 51, simultaneously, voltage comparator circuit 53 can preferentially be selected mains-supplied, its principle such as following: when commercial power supply just often, triode Q5 base stage becomes high level, reach its turn-on condition, conducting between triode Q5 collector electrode and the emitter, collector electrode becomes low level since this moment operational amplifier U1A in-phase input end voltage greater than inverting input voltage, therefore its output is exported high level, positive-negative-positive triode Q2 ends, and owing to the base stage of triode Q3 in the mains-supplied circuit 52 is drawn high, triode Q3 becomes conducting state simultaneously, led light source 2 operate as normal have reached the function of preferential selection mains-supplied.When situations such as appearance power failure suddenly, because the base stage of triode Q3 becomes low level in the mains-supplied circuit 52, triode becomes cut-off state, mains-supplied circuit 52 disconnects, at this moment, because battery pack 4 has been full of electricity, circuit can transfer to again by battery pack 4 power supplies.What need further specify is, this circuit design has increased voltage booster 54, and this circuit is a core with boost control chip U2-MC34063, and main effect is when using rechargeable battery pack 4 to power, and is used for the stability of holding circuit voltage and current.

In addition, as preferred embodiment, described battery feed circuit 51 also comprises current rectifying and wave filtering circuit 511 and anti-overcharge protective circuit 512, and described current rectifying and wave filtering circuit 511 is in series with anti-overcharge protective circuit 512.

As shown in Figure 3, current rectifying and wave filtering circuit 511 mainly is made of diode D1 and capacitor C 1, and signal becomes the individual event signal after by diode D1, then through becoming desired signal behind the electric capacity filtering clutter; Anti-overcharge protective circuit is by triode Q1; resistance R 5; capacitor C 3; resistance R 9; capacitor C 4; resistance R 13; operational amplifier U1B; resistance R 7 and resistance R 12 constitute; the base stage of described triode Q1 links to each other with the output of operational amplifier U1B by resistance R 9 backs; resistance R 5 is parallel between the base stage and emitter of triode Q1; capacitor C 3 one ends connect triode Q1 base stage; other end ground connection; capacitor C 4 is parallel between the output and inverting input of operational amplifier U1B; and form the relation of being connected in series with current-limiting resistance R13; the in-phase input end of operational amplifier U1B links to each other with the negative pole of diode D1 via behind two divider resistance R12 and the R7; when rechargeable battery pack 4 voltages reach capacity state; two inter-stage voltages of battery pack 4 raise; the voltage of operational amplifier U1B in-phase input end increases; make the voltage of reverse input end less than the voltage of in-phase input end; its output becomes high level, and at this moment, triode Q1 becomes cut-off state; charging circuit disconnects, and has played the effect of over-charge protective.

Certainly, the utility model can also adopt form different from the embodiment described above, and for example illuminating source adopts non-led light source, and conversion that these are equal to or corresponding the change all should belong in the protection range of the present utility model.

Claims

1. LED ceiling light that possesses emergency function, comprise AC-DC Switching Power Supply (1), led light source (2), it is characterized in that: described AC-DC Switching Power Supply (1) is connected with battery pack (4) by DC-DC converter (3), and described AC-DC Switching Power Supply (1) is connected with led light source (2) by the electronic switching circuit (5) that preferentially is connected civil power with battery pack (4).

2. the LED ceiling light that possesses emergency function according to claim 1, it is characterized in that: described electronic switching circuit (5) comprises battery feed circuit (51), mains-supplied circuit (52), voltage comparator circuit (53) and battery booster circuit (54), described battery feed circuit (51) links to each other with voltage comparator circuit (53) with mains-supplied circuit (52), described voltage comparator circuit (53) one branch roads link to each other with led light source (2) by booster circuit (54), and another branch road directly links to each other with led light source (2).

3. the LED ceiling light that possesses emergency function according to claim 2; it is characterized in that: described battery feed circuit (51) also comprises current rectifying and wave filtering circuit (511) and anti-overcharge protective circuit (512), and described current rectifying and wave filtering circuit (511) is in series with anti-overcharge protective circuit (512).