Summary of the invention
Technical problem to be solved in the utility model is to remedy the defective that above-mentioned prior art exists, and a kind of improved acousto-optic control self-extinguishing switch is provided.
Technical problem of the present utility model is solved by the following technical programs.
This acousto-optic control self-extinguishing switch, comprise the photosensitive combined sensor circuit of pick-up, delay switch integrated circuit and alternating current controlling output circuit that cascade connects, and the rectification power circuit that is connected respectively with delay switch integrated circuit, alternating current controlling output circuit, described alternating current controlling output circuit is the switching transistor controlling output circuit, comprise that switching transistor, its coil get the relay that dead electricity is controlled by switching transistor, the common of described relay is connected with civil power live wire output, and a normally-closed contact is connected with emergency power supply phase line input.
The characteristics of this acousto-optic control self-extinguishing switch are:
Also be provided with the switching power circuit that is connected respectively with the photosensitive combined sensor circuit of pick-up, delay switch integrated circuit, alternating current controlling output circuit, described switching power circuit is switch provides DC power supply for the photosensitive combined sensor circuit of pick-up, delay switch integrated circuit between the off period a switching power circuit.
Between civil power live wire input and civil power live wire output, be provided with the series arm of forming by two-phase controllable silicon and current-limiting resistance, the described two-phase silicon controlled control utmost point is connected with civil power live wire input by voltage stabilizing didoe, and another normally opened contact of described relay is connected with civil power live wire input by two-phase silicon controlled cathode and anode.
Technical problem of the present utility model is solved by following further technical scheme.
Described switching power circuit is a single tube auto-excitation type wide-voltage switch power circuit.
The beneficial effect that the utility model is compared with the prior art is:
The utility model life-span is long, easy for installation, even as long as and under emergency rating, have emergency power supply not have the input of civil power live wire, the also emergent uninterrupted power supply of cut type by force, can also be when connecting the standby of civil power live wire input be the electricity-saving lamp power supply of microampere order to power consumption.This switch power consumption is a microampere order during the utility model standby, and does not have civil power zero line input, can save wiring cost, improves the security reliability of circuit.
Embodiment
The acousto-optic control self-extinguishing switch that is used to control 220 volts of AC electric appliance as shown in Figure 1, 2, comprise the photosensitive pick-up combined sensor of 5537 types circuit 1,74HC00 type delay switch integrated circuit 4 (U1) and alternating current controlling output circuit 2 that cascade connects, and the rectification power circuit 3, the single tube auto-excitation type wide-voltage switch power circuit 1 that are connected respectively with delay switch integrated circuit 4, alternating current controlling output circuit 2.Single tube auto-excitation type wide-voltage switch power circuit 1 is that switch is the switching power circuit that the photosensitive pick-up combined sensor of 5537 types circuit 1,74HC00 type delay switch integrated circuit 4 (U1) provide DC power supply between the off period.The photosensitive pick-up combined sensor of 5537 types circuit 1 comprises Electret condenser microphone M1 and 5537 type photo resistance CDS.
Be provided with the series arm of being made up of two-phase controllable silicon T1 and current-limiting resistance R8 between civil power live wire input L and civil power live wire output L1, the control utmost point of two-phase controllable silicon T1 is connected with civil power live wire input L by voltage stabilizing didoe D10, D11.
Single tube auto-excitation type wide-voltage switch power circuit 1 comprises coupling capacitance C12, rectifier bridge heap BR2, high frequency transformer L1, HF switch pipe VT1, starting resistance R10, self-excitation capacitance C8, emitter resistance R9, capacitor C 10, rectifier diode D3, D4 and filter capacitor C4, C7.Control self-extinguishing switch between the off period at this acousto-optic, during being relay J 1 coil losing electricity, by the electric main live wire through coupling capacitance C12, direct voltage about the 300V of rectifier bridge heap BR2 output, the one tunnel elementary winding through high frequency transformer L1 directly is added to HF switch pipe VT1 collector electrode, another road is added to HF switch pipe VT1 base stage through starting resistance R10, at self-excitation capacitance C8, under the acting in conjunction of high frequency transformer L1, HF switch pipe VT1 self-excitation work, the secondary output voltage one tunnel of high frequency transformer L1 is given relay J 1 coil power supply of alternating current controlling output circuit 2 through rectifier diode D3, and one the tunnel through rectifier diode D4, filter capacitor C4, C7, the direct voltage that coupling resistance R2 obtains is given the photosensitive pick-up combined sensor 1 of 5537 types, 74HC00 type delay switch integrated circuit 4 (U1) provide DC power supply.In this acousto-optic control self-extinguishing switch conduction period, be relay J 1 coil get electric during, the rectifier bridge of single tube auto-excitation type wide-voltage switch power circuit 1 heap BR2 by relay J 1 by the normally opened contact short circuit of adhesive, single tube auto-excitation type wide-voltage switch power circuit 1 quits work.
Alternating current controlling output circuit 2 is switching transistor controlling output circuit, comprise that switching transistor Q2, its coil get the relay J 1 that dead electricity is controlled by switching transistor Q2, the common of relay J 1 is connected with civil power live wire output L1, one normally-closed contact is connected with emergency power supply phase line input A, another normally opened contact is that phase line input L is connected by the cathode and anode of two-phase controllable silicon T1 with the civil power live wire, and the control end of two-phase controllable silicon T1 is that phase line input L is connected with the civil power live wire also by voltage stabilizing didoe D10, D11.When this acousto-optic control self-extinguishing switch is connected civil power live wire input L standby, two-phase controllable silicon T1 conducting immediately, civil power live wire input L is connected with civil power live wire output L1 by current-limiting resistance R18, is the electricity-saving lamp power supply of 60 microampere orders to power consumption.
The bridge rectification power circuit that rectification power circuit 3 is made up of rectifier bridge heap BR1, voltage stabilizing didoe D1, filter capacitor C5, C9, the photosensitive pick-up combined sensor 1 of switching transistor Q2,5537 types, 74HC00 type delay switch integrated circuit 4 (U1) that are respectively alternating current controlling output circuit 2 provide DC power supply.And in this acousto-optic control self-extinguishing switch conduction period, during to be that relay J 1 coil gets electric, single tube auto-excitation type wide-voltage switch power circuit 1 quits work, be that the photosensitive pick-up combined sensor 1 of 5537 types, 74HC00 type delay switch integrated circuit 4 (U1) continue to provide DC power supply, through 74HC00 type delay switch integrated circuit 4 (U1) no-output after the time of delay of setting, relay J 1 coil losing electricity is got back to holding state.
When ambient light illumination died down to the 7Lux left and right sides, it is big that photo resistance CDS resistance becomes, and the level of delay switch integrated circuit 4 connecting pins is uprised; Or environmental noise is when strengthening, Electret condenser microphone M1 receives the positive pulse signal of telecommunication process coupling capacitance C1 coupling that environmental noise is changed, make switch triode Q1 be in the saturation conduction state, when the coupling capacitance C1 coupling negative pulse signal of telecommunication, switch triode Q1 ends rapidly, its current collection is high level very, detect the switching transistor Q2 conducting of amplifying back control alternating current controlling output circuit 2 through delay switch integrated circuit 4, relay J 1 is got, its normally opened contact adhesive, civil power live wire input L is connected with civil power live wire output L1 by the normally opened contact of this adhesive, electric to this acousto-optic control self-extinguishing switch, ambient light illumination or noise such as no change during this time, switching transistor Q2 in delay adjustments delay switch integrated circuit 4 control alternating current controlling output circuit 2 after the time ends, make relay J 1 dead electricity, the load of this acousto-optic control self-extinguishing switch is cut off the power supply automatically.
Under the fire-fighting emergent state, need only emergency power supply phase line input A and be connected with emergency power supply, even ambient light illumination does not die down to the 7Lux, environmental noise does not strengthen or do not have the civil power input, emergency power supply phase line input A is connected with civil power live wire output L1 by the normally-closed contact of relay J 1, to the emergent uninterrupted power supply of the strong cut type of load of this acousto-optic control self-extinguishing switch.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design, make some alternative or obvious modification that are equal to; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the utility model is determined by claims of being submitted to.