CN2053821U - Remote-controlled automatic current cut-out - Google Patents

Abstract

The utility model relates to a switch device automatically cutting out the power supply supplying electricity of the controlled electrical appliance; the switch and a remote controller are used in matching way. The utility model is composed of a current mutual inductor, a delay-time circuit, and a recognition circuit for electric current. The switch device can make use of the remote controller to manipulate the variance of the AC current of the controlled electric appliances after shutting down and before shutting down so as to reach the purpose of automatically cutting out the power supply supplying electricity of the controlled electric appliance. The utility model can avoid the accident of the electric appliance cuased by the partial circuit of the remote-control electric appliance electrifying after shutting down so that the function of the remote control device is perfected. The utility model is stable in performance and use in convenient.

Description

Remote-controlled automatic current cut-out

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, belongs to electrical apparatus-switching device.

The remote controller that is used in colour TV etc. at present is after shutdown, and partial circuit still is in charged operating state in the controlled electrical equipment, and if things go on like this, this partial circuit very easily produces fault, and shortens appliance life.Therefore, in the product description of colour TV remote controller, emphasize after the remote controller shutdown circuit of must cutting off the electricity supply.This makes troubles for the user who uses a teleswitch.

The utility model provides a kind of device that can cut off controlled electric power supply power supply after the remote controller shutdown automatically at above-mentioned deficiency, reach and improve remote-controller function, makes things convenient for user's purpose.

The technical solution of the utility model is achieved in that in the electric current identification circuit, the primary side of current transformer is serially connected with on the ac power supply circuit of controlled electrical equipment, after current transformer is induced into the working alternating current of controlled electrical equipment, keep the adhesive of alternating-current switch.Along with the disappearance of shutdown back operating current, alternating-current switch cuts off power supply automatically.

Consider the reason that to keep the alternating-current switch adhesive when the controlled electrical equipment initialization of part electric current is too small, in the electric current identification circuit, also add an electronic delay circuit of forming by capacitor and resistor.

The utility model is that example provides embodiment with the colour TV remote controller.

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

Among the figure: A, B two ends are 220 volts of ac voltage inputs, are connected to 220 volts of AC power during use; C, D two ends are 220 volts of ac voltage outputs, are connected to the colour tv power supply plug during use; T is a current transformer, and its primary side seals in the colour TV ac power supply circuit; J _-1One group of normally opened contact for relay J.R ₁, C ₂Form delay circuit; T, D ₁Form an electric current identification circuit, in order to detect the working alternating current of colour TV; C ₃, D _2-5Form this device self working power circuit; J, D ₆Form an alternating current switching circuit, during the J adhesive, apparatus for establishing self operating voltage, and C, D two ends have 220 volts of alternating voltages outputs when J discharges, is installed self operating voltage and is disappeared, and C, D two ends do not have alternating voltage output.

When the need colour TV is worked, press the AN button, the alternating voltage of A, B end passes through C ₃Step-down, D _2-5After the rectification, form a direct current voltage at E, G end, the E end to the G end for just.This voltage passes through C ₁, R ₁Make BG ₁, BG ₂Instantaneous saturated, and pass through BG ₂, C ₂R ₁Charging current, make BG again ₁, BG ₂(it is held time by C to keep its saturation condition ₂, R ₁Decision), because of thereby the J adhesive, connection colour TV power supply, the primary side of T will flow through bigger colour TV operating current, at R ₂Two ends produce a bigger voltage, and this voltage is through D ₁Pass through R after the rectification ₁Be BG ₁One enough big forward bias current is provided, guarantees the adhesive of J, the colour TV working stability.After the colour TV shutdown that uses a teleswitch, the electric current that flows through the primary side of T diminishes, R ₂On voltage also diminish BG ₁, BG ₂End, J discharges, and cuts off the colour TV power supply automatically.C ₁, C ₂Pass through D ₁, T secondary side discharge, finish the one action circulation.

Claims (2)

1, a kind of Remote Control Automatic breaker device, by working power circuit, electric current identification circuit and alternating-current switch are formed, and it is characterized in that: the primary side of the current transformer T in the electric current identification circuit and relay J are connected in series the ac power supply circuit into controlled electrical equipment.

2, Remote Control Automatic breaker device as claimed in claim 1 is characterized in that: be provided with one in the electric current identification circuit by capacitor C ₂And resistor R ₁The electronic delay circuit of forming, resistance R ₁Respectively with BG ₁Base stage and diode D ₁Join; Capacitor C ₂Be connected to BG respectively ₂Emitter and diode D ₁