CN2131233Y

CN2131233Y - Remote-controlled integrated auto-breaking protector

Info

Publication number: CN2131233Y
Application number: CN 92218355
Authority: CN
Inventors: 董新初
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-15
Filing date: 1992-07-15
Publication date: 1993-04-28
Anticipated expiration: 2002-07-15

Abstract

The utility model discloses an integrated protector which is matched with a remote controller and is capable of auto-breaking the power supply source of a controlled electric appliance. The utility model is widely used in various remote control color televisions, video tape recorders, combination audios and other electrical appliance which are provided with remote control. The monitoring of a load loop is determined through making use of the change information of electric current when the controlled electric appliance normally works and the remote control stops. The utility model comprises a trigger circuit, an over voltage protecting circuit, a sampling control circuit, a power break circuit, a shell, etc. The circuit is simple and reliable. After the controlled electric appliance electric appliance shuts down, the utility model is capable of auto-breaking the power supply, and the utility model has the functions of surge voltage absorbing, over voltage protecting, electricity stopping, electricity resuming, self-locking, etc. In addition, the utility model has the advantages of power saving, and the service life of the controlled electric appliance is prolonged.

Description

Remote-controlled integrated auto-breaking protector

The utility model relates to a kind of and the device controlled electric power supply power supply of the matching used automatic cut-out of remote controller.Be widely used in the electric equipment of various remote control colour TV sets, video tape recorder, combination audio and other band remote control.

The device of cutting off the electricity supply automatically after the remote controller shutdown of using at present is varied.Two relays of the employing that has are controlled, and its contact load is more than 8～10A, and circuit is complicated, the also corresponding increase of cost; Adhesive and release that the ratio by the design instrument transformer that has comes direct control relay, because the operating current disunity of various controlled electric equipment holding states, the release voltage of relay is much smaller than rated operational voltage, and manufacturing is adjusted complicated, and adaptability is relatively poor; Also has a kind of colour TV shutdown unit; its overvoltage crowbar adopts piezo-resistance, and piezo-resistance is only to the good action that is absorbed with of the instantaneous surge voltage of the class of being struck by lightning, at the excessive rolling that continues with breakdown; cause irreversible damage and lose defencive function, reliability reduces.

The purpose of this utility model is to provide that a kind of circuit is simple, the Remote Control Automatic outage comprehensive protector of reliable operation.

The purpose of this utility model adopts following technical scheme to realize: when utilizing controlled electrical equipment operate as normal and the electric current change information of remote control when " stopping " determining load circuit is implemented monitoring.The utility model is made up of circuits for triggering, overvoltage crowbar, sampling control circuit, power cutting circuit and case etc.Two groups of contact J-1 and J-2, the starting switch AN of fuse BX, relay J constitute circuits for triggering.Fuse BX and bidirectional diode constitute overvoltage crowbar.Current transformer T, bridge rectifier D ₁-D ₄, filter capacitor C ₁Constitute power cutting circuit with relay J.Constitute by potentiometer RW, triode BG and controllable silicon SCR with the sampling control circuit of relay J coils from parallel connection of coils.In circuits for triggering, a contact J-1 serial connection back of fuse BX and relay J is in parallel with the contact A N-1 of starting switch, and another contact A N-2 of starting switch AN is connected in parallel on the contact J-2 of relay.

Operation principle of the present utility model is: controlled appliances power source end is inserted socket CZ, and starting switch AN places " connection " position, and the 220V alternating current forms the loop through the elementary and controlled electrical equipment of current transformer T.The secondary generation induced current of current transformer T is through D ₁-D ₄Bridge rectifier, capacitor C ₁Directly connect relay J after the filtering, as the signal source of sampling control circuit, this moment relay contact J-1 and J-2 adhesive realizes self-insurance, controlled electrical equipment operate as normal to this electric current simultaneously.This direct current makes the instantaneous saturation conduction of triode BG through potentiometer RW, this moment triode BG collector electrode current potential≤0.6 volt, deficiency is so that the controllable silicon SCR conducting, light-emitting diode is glittering to show this comprehensive protector operate as normal.When desire is shut down; press " stopping " button on the remote controller; controlled electrical work electric current reduces thereupon; the electric current that flows through current transformer T time level diminishes, and the voltage at potentiometer RW two ends is also descended thereupon, and triode BG is become by conducting and ends; the collector potential of BG rises and makes the controllable silicon SCR conducting; relay J dead electricity and discharging, controlled appliances power source is cut off, and meanwhile the operating voltage of comprehensive protection device self also disappears thereupon.Not only economized on electricity but also prolonged useful life of controlled electrical equipment.When controlled electrical work, have a power failure suddenly, the relay J dead electricity, its contact J-1, J-2 disconnect and cut off the electricity supply.Must press starting switch AN during incoming call, could recover the power supply of this comprehensive protection device and controlled electrical equipment, have the telegram in reply of power failure auto-lock function.

After the elementary and controlled appliances power source socket CZ of current transformer T connects, in parallel with the bidirectional diode TNR in the overvoltage crowbar again.The instantaneous overvoltage of line voltage takes place when controlled electrical equipment operate as normal or be struck by lightning, bidirectional diode TNR carries out amplitude limit to this overvoltage or surge voltage, makes its output voltage be no more than puncture voltage; When if voltage continues to raise, as misphase etc. takes place, fuse BX fuses, and relay J discharges because of current transformer T dead electricity, and output voltage is zero, protects controlled electrical equipment to avoid damaging.

The utility model sampling control circuit is secondary with current transformer, relay coil is in parallel, because of the D.C. resistance of relay coil equivalent resistance much smaller than the sampling control circuit, the powerful impulse current overwhelming majority transformer induced during start forms the loop with coil, make the components and parts of sampling control circuit and power cutting circuit avoid impacting, improved reliability, the stability of device effectively.Simultaneously because two groups of contacts of starting switch are connected in parallel on the relay contact respectively; the starting of controlled electrical equipment, erasing current do not flow through the contact of relay during start; the shutdown electric current is very little again during shutdown; as colour TV operate as normal total current 300～500mA only; therefore can select for use small-sized or sensitive microrelay just can be worked reliably; the small current instrument transformer that is complementary therewith also can meet the demands; make the whole circuit advantages of simple that more becomes; controlled electrical equipment is not made any structure to be changed; the corresponding raising of sensitivity of monitoring and protection; power consumption is little, and cost is low.

Accompanying drawing is a kind of electrical schematic diagram of the utility model.

Below with reference to accompanying drawing the utility model is described in further detail.

Elementary, the controlled appliances power source socket CZ of the contact J-1 of fuse BX, relay, current transformer T and another contact J-2 of relay J are connected in the ac power supply circuit.Current transformer T selects the small current instrument transformer for use, with common enamelled wire coiling.Relay J adopts JZC-90F type 0.36W small-sized DC relay.Starting switch is the conventional push button switch, as the AN4 type.Bidirectional diode TNR model is BR220.Bridge rectifier D ₁～D ₄Select the 1N4001 diode for use, potentiometer RW is the 0.5W10K solid potentiometer.Triode BG adopts 9013 transistor npn npns.Controllable silicon SCR is the MCR100-4 type.Resistance R ₁, R ₂And R ₃All use the 1/8W fixed carbon resister, resistance is respectively 10K Ω, 15K Ω and 1K Ω.Capacitor C ₁, C ₂Select 470uf/16v, 220uf/16v electrolytic capacitor respectively for use.LED is selected φ 3 green LEDs for use.All components and parts of the utility model are contained in the case, safety attractive in appearance.

Claims

1, a kind of Remote Control Automatic outage comprehensive protection device; form by circuits for triggering, overvoltage crowbar, sampling control circuit, power cutting circuit and case etc.; a contact J-1 series connection back that it is characterized in that fuse BX in the circuits for triggering and relay J is in parallel with the contact A N-1 of starting switch AN, and another contact A N-2 of starting switch AN is connected in parallel on the contact J-2 of relay.

2, Remote Control Automatic outage comprehensive protection device according to claim 1 is characterized in that the secondary of current transformer T directly connects the relay J coil after rectification, filtering, and the signal source of the control circuit of conduct sampling simultaneously.

3,, in parallel with the bidirectional diode TNR of overvoltage crowbar again after the elementary and controlled appliances power source socket CZ that it is characterized in that current transformer T connects according to claim 1,2 described Remote Control Automatic outage comprehensive protection devices.