CN202334980U - Maintenance-free domestic emergency illumination indicating lamp - Google Patents

Abstract

The utility model discloses a maintenance-free domestic emergency illumination indicating lamp, which uses a farad capacitor as the power energy storage element and a high-brightness light emitting diode (LED) as the illumination element. A circuit comprises a current-limiting circuit, a rectification circuit, a voltage stabilizing circuit, a charging circuit, an LED driving circuit, a control circuit and the like; after being limited, the 220V power supply enters the rectification circuit to obtain a direct current power supply; the stable direct current power supply is obtained after the direct current power supply passes through the voltage stabilizing circuit and is used for charging the farad capacitor. When an alternative current power supply exists, the control circuit controls the LED not to illuminate; when the alternative current power supply is cut off, the control circuit uses the electric charge stored in the farad capacitor to discharge, so as to ensure the LED to illuminate. As a storage battery is not taken as a power storage element necessarily and due to the designed characteristics of the circuit, the lamp is maintenance-free year in year out, so that extremely long service life can be realized; and 'where there is precaution, there will be no danger'.

Description

Non-maintaining family expenses emergency lighting indicator light

Technical field

The utility model relates to a kind of LED lighting pilot lamp, relates in particular to a kind of capacitance energy storage LED lighting pilot lamp.

Background technology:

At public buildings such as enterprise, market, schools, all must emergent direction board be set by the Fire Prevention Law requirement, when disasters such as power failure, earthquake, fire took place, emergent direction board can guide the public to escape.

At present, do not force as yet emergent direction board is installed at the public space (in corridor) of residential building, and emergent direction board is not installed in the resident family especially.Trace it to its cause, mainly contain following some: (1) resident is familiar to oneself environment and corridor environment, need not indicate the path.(2) owing to use storage battery, need therefore often to safeguard that optimal situation also is whenever must change battery at a distance from 3～5 years as the electric flux memory element; (3) price is high; (4) need special installing space; (5) energy consumption is higher, and present used fire-fighting indicator light is in illuminating state all the time.Though the power of these lamps is little, lights all the year round still and need consume certain electric flux.In case being generalized to family, it uses, because quantity is huge, with the consumption that increases the energy greatly.

Patent 200420105148.3 and 200520066203.7 provides respectively uses the emergency light of farad capacitor as the electric weight storage scheme, but they all are as lighting, and design philosophy, condition of work and the utility model are also inequality.

Summary of the invention:

The utility model is exactly the solution that proposes to above problem.Though the resident is familiar with the path, still have the demand of illumination when having a power failure, especially take place housing construction is caused more indispensable illumination functions of bad time in disaster.The utility model is that local-style dwelling houses provides the function of emergency illumination when cutting off the power supply.It has following characteristic:

(1) oneself power consumption is little.This indicator light is not lighted when electricity is arranged, and only when having a power failure, lights.Electric flux only replenishes electric weight for storage capacitor, and circuit consumes any energy hardly.

(2) non-maintaining.Owing to use farad capacitor as energy-storage travelling wave tube, therefore do not have required periodic maintenance of storage battery and replacing problem.Circuit is very simple, power consumption is extremely low, be in "on" position for a long time, and components and parts work in its natural physical characteristic state, not fragilely also can not make mistakes, and can need not any maintenance in the time and keep its function at any time by many decades.

(3) the design arranges the light source of a plurality of small-powers fixed location in the family.Its volume is very little, can be installed in the existing household electrical appliance.Be designed primarily at present and be installed on (but being not limited to be installed in this socket) in the 86 type household outlet, utilize the space of socket to lay circuit and its panel is transformed the increase luminous tube slightly.

In sum, this emergency light can be used as family's last line of defense, at other any light sources (with the lamp of ac-powered, torch, candle etc.) because outage, do not have battery, can not find etc. former thereby play a role can not use the time.

The utility model is work like this:

Circuit comprises that capacitance current-limiting circuit, rectification circuit, voltage stabilizing circuit, charging circuit, led drive circuit and control circuit etc. partly form.The 220V power supply gets into rectification circuit after through capacitance current-limiting, obtains DC power supply.DC power supply obtains the galvanic current source through behind the voltage stabilizing circuit, and this power supply is the farad capacitor charging.When AC power, control circuit makes that light-emitting diode (LED) is not luminous; When AC power had a power failure, control circuit used the charge discharge of farad capacitor stored to make light-emitting diode (LED) luminous.

Description of drawings:

Fig. 1 is the schematic diagram of non-maintaining family expenses emergency lighting indicator light.

Fig. 2 is the outline drawing that embodiment 1 makes.

The practical implementation method:

Specify embodiment example 1 below in conjunction with accompanying drawing.

1. circuit working principle

Among Fig. 1, capacitor C 1 is a current limiting capacitance, and R2 is as the bleeder resistance of capacitor C 1.Resistance R 1 is connected with capacitor C 1, and the surge current when being used to prevent to power on prevents the damage of voltage stabilizing didoe.

Capacitor C 1 is selected the CBB electric capacity of 0.022uf/400V for use.

Its capacitive reactance is:

$\mathrm{Xc}=\frac{1}{2\mathrm{\πfc}}=\frac{1}{2\×3.14\×50\×0.022\×{10}^{-6}}=1.45\×{10}^5\mathrm{\Ω}$

So the electric capacity of low capacity can only provide the electric current that is no more than 2mA, and this electric current is not to be used for lighting LED, but be used for being the storage capacitor charging.The advantage of using low capacity electric capacity to bring is a lot, includes but not limited to that cost reduces, and each component reliability improves, power consumption reduction etc.

Because electric current is minimum during operate as normal; Therefore, the resistance of resistance R 1 is chosen as 1K, and its average power consumption is no more than 4mW; And it can be restricted to the electric current of energising moment to be no more than 310mA; Within the tolerance range of 5.6V/2W voltage stabilizing didoe, even often switching is electric, voltage stabilizing didoe can not damage yet fully for this.

Diode D1 and D2 have formed rectification circuit, and alternating current is become direct current.Diode D4 is the voltage stabilizing didoe of a 5.6V/2W, and it is 5.6V with dc voltage stability.This DC power supply is isolated the back through diode D3 and is farad capacitor C3 charging.

When AC power, the voltage at capacitor C 2 two ends is 5.6V.The base of positive-negative-positive triode Q1 is connected on the positive pole of capacitor C 2, and this magnitude of voltage is more taller than its emitter voltage, and therefore, Q1 can not conducting, and light-emitting diode D5 can not light.When outage took place, capacitor C 2 was through resistance R 3 discharges, and the voltage at its two ends descends very soon, because the buffer action of diode D3, farad capacitor can be through resistance R 3 discharges.When the C2 voltage drops to when being lower than capacitor C 3 voltage, positive-negative-positive triode Q1 satisfies turn-on condition, and C3 supplies power to super bright light-emitting diode D5 through current-limiting resistance R5, and D5 lights.Capacitor C 3 is value as required, draws with 2.2F to be example, can let LED have enough brightness to light 20 minutes after being full of electricity, and brightness after this decays gradually, can extinguish fully after 1 hour.

Fig. 2 is mounted in the outline drawing on the 86 profile plates, and the circle at its top is exactly the LED illuminating lamp.

2. circuit characteristic analysis

Because diode all has cut-in voltage, when being lower than cut-in voltage, diode can not conducting.The cut-in voltage of high bright light-emitting diode is about 3V, and therefore, when light-emitting diode extinguished, capacitor C 3 two ends still had 3V voltage, has 50% the quantity of electric charge not to be fully utilized in other words.If use more complicated boost, constant-current drive circuit, can significant prolongation LED time of lighting and the consistency of improving the LED luminosity.But this can make, and circuit complicates, cost increases, the reliability of reduction work, loses more than gain.Therefore, this circuit has only been used the simplest LED driving circuit.Longer if desired lighting hours is perhaps lighted more LED, can strengthen the capacity of capacitor C 2.

It is when among the C3 as yet not during store charge that capacitor C 1 is selected the so for a short time unique influence that brings, and needs long time could electric charge be full of.According to the difference of the capacity of the selected capacitor C 3 of physical circuit, this time possibly need more than 10 hours to tens hours.With example 1 used 2.2F farad is example, and actual measurement needs 12 hours.Just this circuit causes under the situation that capacitor C 1 discharge fully coming into operation first or long-time the power failure taken place, if incoming call back less than had a power failure again in 12 hours, this circuit possibility time inoperative or that LED is luminous can shorten so.But the concrete application of circuit hereto, this is not a problem because the work of this emergent indicator light several years one meets often, many decades one is met even also can not run into throughout one's life.Therefore, this circuit can be on performance, price The Gift of Being the Best You Can Be compromise, be convenient to the acceptance in market.

Capacitor C 1 long-term incoming transport power supply can influence its life-span to some extent, shows that mainly its capacity can descend to some extent.This also is the capacitance decompression current-limiting circuit reason of place in circuit for a long time.And from the analysis of this circuit working principle, unique consequence that the decline of capacitor C 1 capacity causes is exactly to make the charging interval of farad capacitor C3 become more longer, and this is for normal use did not influence.Therefore, this also is the reason that this circuit can long-term non-maintaining operate as normal.

Claims (3)

1. non-maintaining family expenses emergency lighting indicator light; It is characterized in that using farad capacitor as the electric flux memory element; Use high bright light-emitting diode (LED) as illumination component; Circuit comprises that current-limiting circuit, rectification circuit, voltage stabilizing circuit, charging circuit, led drive circuit and control circuit etc. partly form, and the 220V power supply gets into rectification circuit after through current limliting, obtains DC power supply; DC power supply obtains the galvanic current source through behind the voltage stabilizing circuit, and this power supply is the farad capacitor charging, and when AC power, control circuit makes that light-emitting diode (LED) is not luminous; When AC power had a power failure, control circuit used the charge discharge of farad capacitor stored to make light-emitting diode (LED) luminous.

2. emergency lighting indicator light according to claim 1; When it is characterized in that ac power supply; AC power only is used to the storage capacitor charging, and the undercurrent that circuit provides is to reach the rated operational current of light-emitting diode, and circuit has the characteristics of little power consumption.

3. emergency lighting indicator light according to claim 1, when it is characterized in that ac power supply, light-emitting diode (LED) is not luminous, and when AC power was stopped power supply, (LED) was luminous for light-emitting diode.

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