CN2242390Y - Lighting device with no-interruption function - Google Patents

Abstract

The utility model relates to a lighting device. A DC control circuit is connected in the DC lighting circuit of the lighting device, and the DC lighting circuit and the DC control circuit together form a DC switching circuit with three conditions. An AC control circuit is connected to the AC lighting circuit, and the AC control circuit and the AC lighting circuit together form an AC switch circuit with two conditions. The utility model works for lighting under normal urban power supply, and once the power is cut off, the power is instantly supplied by a current condenser automatically to continue the normal lighting to achieve the purpose of uninterrupted lighting.

Description

The continuous illumination light fixture

The utility model relates to a kind of lighting.

Existing lighting no matter be incandescent lamp or fluorescent lamp, only just throws light on when mains-supplied, just can't use in case have a power failure.And now along with the popularizing rapidly of big power consumption household electrical appliance such as air-conditioning, refrigerator, microwave oven, large-screen receiver, the time have the power failure phenomenon to take place.People use emergency light when usually having a power failure, and the taking-up emergency light of at first need feeling about in the dark has inconvenience, and emergency light charges that the time of putting behind the electricity is long, and utilance is very low, and the lighting hours after the power failure is also lacked, and it is not suitable for writing illumination yet in addition.

The purpose of this utility model is exactly in order to address the above problem, and a kind of continuous illumination light fixture that all can operate as normal under civil power normal power supply or power-off condition is provided.

Technical solution of the present utility model:

A kind of continuous illumination light fixture, it includes by attaching plug C _T, exchange dimmer TGQ, incandescent lamp bulb R _L1The alternating current lighting loop of forming is by K switch ₁, the dc switch integrated circuit (IC) ₂, battery lamp bubble R _L2The direct current lighting loop of forming reaches by power transformer B ₁, rectification full-bridge Q ₁, capacitor C ₁, integrated regulator IC ₁, non-maintaining sealed cell E _CThe automatic charge circuit of forming of storage battery, wherein the direct current lighting loop is connected on the output of the automatic charge circuit of storage battery, it is characterized in that being connected to by resistance R in the direct current lighting loop ₂, R ₃, R ₇, R ₈, transistor BG ₂The DC control circuit of forming, they constitute direct current three condition switch circuit, its R together ₂, R ₃Be connected on rectification full-bridge Q after the series connection _LOutput, R ₂, R ₃Mid point meet BG ₂Base stage, BG ₂Collector electrode connect the dc switch integrated circuit (IC) ₂Control end, pass through simultaneously R again respectively ₇And R ₈With IC ₂Input be connected with output; In the alternating current lighting loop, be connected to by resistance R ₁, R ₆, transistor BG ₁, the AC control circuit that solid-state relay TAC forms, they constitute interchange two condition switch circuit, its R together ₆One terminate at K switch ₁And IC ₂On the end that input links to each other, R ₆Another termination BG ₁Base stage, BG ₁Collector electrode pass through R ₁Meet rectification full-bridge Q _LPositive output end, BG ₁Emitter-base bandgap grading connect solid-state relay TAC control end positive pole, TAC control end minus earth, two of TAC to exchange end continuous with civil power one input and an end that exchanges dimmer TGQ respectively.

The utility model combines lighting as a whole first with emergency light, form the continuous illumination light fixture, it at civil power just often, illumination work charges on one side on one side, promptly stops automatically after being full of, in case have a power failure, its automatic again conversion bulb, continue illumination work by the charging current condenser power supply, brightness can be satisfied the requirement of writing illumination, and stream time can reach more than 5 hours under the power-off condition.The utility model realized no matter have electricity still have a power failure can both normal illumination the worker can, and have charging protection automatically, anti-down discharge prevention, electric storage means and prevented functions such as electricity protection.The automatic conversion of the utility model operating state need not be felt about in the dark and be sought the illumination articles for use, and very easy to use, utilance is very high, usually as lighting, as desk lamp, standard lamp, pendent lamp, wall lamp etc., becomes emergency light during power failure automatically, and effect is very good.The utility model is not only applicable to incandescent lamp bulb, is equally applicable to fluorescent lamp.

Fig. 1 is an electrical schematic diagram of the present utility model.

As Fig. 1, just often if be used for illumination, elder generation is with K switch in mains-supplied for the utility model ₁Close, make AC control circuit work, satisfying one of interchange two condition switch circuit has alternating current, and the 2nd, K ₁Two closed conditional requests, then transistor BG ₁Conducting makes solid-state relay TAC two exchange the end conducting, makes the work of alternating current lighting loop, then incandescent lamp bulb R _L1Get electric lighting, its brightness can be regulated by exchanging dimmer TGQ.Above-mentioned solid-state relay TAC also can adopt midget relay to replace.At incandescent lamp bulb R _L1In the time of illumination work, civil power passes through the automatic charge circuit of storage battery to non-maintaining sealed cell E _CCharging is if charging voltage reaches integrated regulator IC ₁During the output voltage of (model can be MC7808), E then _CBe in the floating charge state, and at E _CPositive pole and IC ₁Output between be connected to by resistance R ₄, R ₅, LED and diode D ₁The anti-down discharge charging indication of forming guarantees storage battery E _CIn civil power only charging just often, can not discharge.When the alternating current lighting loop is worked, because resistance R ₂, R ₃Have electric current to pass through on the branch road, the pressure drop of generation makes transistor BG ₂Conducting, then BG ₂Current collection very electronegative potential, i.e. dc switch integrated circuit (IC) ₂The control end of (model can be TWH8778) is in low level, IC ₂End battery lamp bubble RL ₂Do not work.

In case civil power is because during fault outage, incandescent lamp bulb R _L1Extinguish.This moment, three conditions of direct current three condition switch circuit all were satisfied, i.e. K ₁Closure, R ₂, R ₃No-voltage on the branch road, E _COutput voltage is greater than 2/3E _CThe R of DC control circuit like this ₂, R ₃On the branch road owing to there is not electric current to pass through, BG then ₂End, make IC ₂Control end by E _CPass through R ₇, R ₈Dividing potential drop and be in high potential, IC then ₂Conducting, battery lamp bubble R _L2By E _CPowered lighting work, the continuity of illumination when guaranteeing to have a power failure.If interruption duration is long, battery lamp bubble R _L2Work makes E _COutput voltage is less than 2/3E _CThe time, E then _CPass through R ₇, R ₈Branch pressure voltage less than IC ₂The threshold voltage of control end, then IC ₂End R _L2Extinguish, to prevent E _COverdischarge and damaging.

In the utility model, battery lamp bubble R _L2The outside is covered with the little lampshade of self, and little lampshade is close to incandescent lamp bulb R _L1The large lampshade inwall, they are an integral body, only see large lampshade from appearance, little lampshade is hidden in it.Civil power just often, incandescent lamp bulb R _L1Operating illumination is in case have a power failure battery lamp bubble R _L2Automatically light at once, brightness still can be guaranteed.If the utility model is mains failure under working condition not, K only need close a switch ₁Just lighted R immediately _L2

If the interchange dimmer TGQ in the alternating current lighting loop is removed, increase common inverter circuit in direct current three condition switch circuit back simultaneously in the utility model, just can make the continuous illumination light fixture that uses fluorescent lamp.

Claims (4)

1, a kind of continuous illumination light fixture, it includes by attaching plug C _T, exchange dimmer TGQ, incandescent lamp bulb R _L1The alternating current lighting loop of forming is by K switch ₁, the dc switch integrated circuit (IC) ₂, battery lamp bubble R _L2The direct current lighting loop of forming reaches by power transformer B ₁, rectification full-bridge Q ₁, capacitor C ₁, integrated regulator IC ₁, non-maintaining sealed cell E _CThe automatic charge circuit of forming of storage battery, wherein the direct current lighting loop is connected on the output of the automatic charge circuit of storage battery, it is characterized in that being connected to by resistance R in the direct current lighting loop ₂, R ₃, R ₇, R ₈, transistor BG ₂The DC control circuit of forming, they constitute direct current three condition switch circuit, its R together ₂, R ₃Be connected on rectification full-bridge Q after the series connection _LOutput, R ₂, R ₃Mid point meet BG ₂Base stage, BG ₂Collector electrode connect the dc switch integrated circuit (IC) ₂Control end, pass through simultaneously R again respectively ₇And R ₈With IC ₂Input be connected with output; In the alternating current lighting loop, be connected to by resistance R ₁, R ₆, transistor BG ₁, the AC control circuit that solid-state relay TAC forms, they constitute interchange two condition switch circuit, its R together ₆One terminate at K switch ₁And IC ₂On the end that input links to each other, R ₆Another termination BG ₁Base stage, BG ₁Collector electrode pass through R ₁Meet the Q of rectification Golden Bridge _LPositive output end, BG ₁Emitter-base bandgap grading connect solid-state relay TAC control end positive pole, TAC control end minus earth, two of TAC to exchange end continuous with civil power one input and an end that exchanges dimmer TGQ respectively.

2, by the described continuous illumination light fixture of claim 1, it is characterized in that solid-state relay TAC also can be replaced by midget relay.

3,, it is characterized in that battery lamp bubble R by the described continuous illumination light fixture of claim 1 _L2The outside is covered with the little lampshade of self, and little lampshade is close to incandescent lamp bulb R _L1The large lampshade inwall.

4, by the described continuous illumination light fixture of claim 1, it is characterized in that at integrated regulator IC ₁Output and non-maintaining sealed cell E _CPositive pole between be connected to by resistance R ₄, R ₅, LED and diode D ₁The anti-down discharge charging indication of forming.