CN2157612Y - Integrated domestic electric appliances protector - Google Patents

Abstract

The utility model relates to a protector for domestic appliance devices, solving the problems of the over-current and over-voltage protection of domestic appliances and indoor lines and delayed automatic electric supply restoration after the elimination of fault. The delayed pole 1 of a control module ZFB is connected to the contacts of a delayed capacitance C2 and a reed pipe GK; the control pole 2 of the ZFB is electrically connected with a voltage-divided output end in series, and the 1, 2 pins of the ZFB are respectively used to control the connection and disconnection of the 3, 4 pins of the ZFB, so that the connection and disconnection of the BG is controlled, and thus, the relay J buckles and releases to control the on and off of a loading return circuit. With simple structure, and low cost, the utility model is suitable for the automatic protection of a whole power utilization equipment and line.

Description

Integrated domestic electric appliances protector

The utility model relates to a kind of safeties of power consumption equipment, particularly a kind of comprehensive family non-electricity protector.

Existing family non-electricity protector generally is as overcurrent protection with fuse; this outmoded protected mode is more and more impracticable; it can not carry out quick acting to overvoltage and cut off the electricity supply; the safety of protection home appliance; recently people have developed some tame non-electricity protectors; the function of having only overvoltage protection and delayed startup that has; and when occurring overcurrent and short trouble in the circuit; can not excise fault fast; the protector that has in addition with overcurrent, overvoltage and delayed startup function; mostly circuit complexity, debug difficulties, the cost height is unfavorable for promoting the use of.Present electrical network overload operation, line voltage is very unstable.Have a strong impact on the normal operation of electrical equipment, thus people also press for a kind of simple in structure, cost is low, defencive function is complete, the protector of reliable operation, to keep the safety of home appliance.

The purpose of this utility model be to provide a kind of simple in structure, cost is low, have the comprehensive family non-electricity protector of the failure removal time-delay automatic recovery of power supply of over-voltage and over-current.

The utility model is finished with following mode: comprehensive family non-electricity protector comprises that step-down transformer T output meets rectification circuit Z and filter capacitor C1; it is characterized in that at the output of rectification circuit Z and connect the delayed startup circuit formed by capacitor C 2 serial connection diode D5 and and connect the overvoltage crowbar that constitutes by resistance R 2 series resistor R3; at the two ends of capacitor C 2 and connect the current foldback circuit that the contact series resistor R1 by tongue tube GK constitutes; the coil G of tongue tube GK is serially connected in the load circuit; the time-delay utmost point 1 of control module ZFB connects between capacitor C 2 and the diode D5; the control utmost point 2 of control module ZFB connects between the resistance R 2 and R3 of overvoltage crowbar; the promotion utmost point 3 of the base stage link control module ZFB of triode BG; the coil of its collector series relay J; the negative pole 4 of its emitter link control module ZFB; and the cathode output end that connects rectification circuit Z; be connected in series diode D6 between the time-delay utmost point 1 of the collector electrode of triode BG and control module ZFB, the normal opened contact Jk of relay J is serially connected in the load circuit.

The comprehensive family of the utility model non-electricity protector be with overcurrent, overvoltage signal and delayed startup all normalizing piece control module ZFB control, make circuit to simplify greatly; manufacture craft is simple; be easy to debugging; cost is low; function with time-delay automatic recovery of power supply behind overvoltage, overcurrent and the failure removal; its reliability and sensitivity all are better than existing apparatus; as long as the end of registering one's residence in supply line is loaded onto this protector; just can protect indoor whole electrical equipment and circuit, it is applicable to the power consumption equipment of family, office and factory and the automatic protection of supply line.

Fig. 1 is the utility model circuit theory diagrams.

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1; the comprehensive family of the utility model non-electricity protector is to export the rectification circuit Z that is made of diode to by the step-down transformer T step-down that is connected on the load power source; and after the filter capacitor C1 filtering; dc supply is provided; on dc supply and be connected to the delayed startup circuit that constitutes by capacitor C 2 series-opposing diode D5; and and be connected to the overvoltage crowbar that series connection bleeder circuit resistance R 2 series resistor R3 constitute; the two ends of capacitor C 2 and connect the overcurrent protection loop that constitutes by tongue tube GK contact series resistor R1 in the delayed startup circuit; in the coil G serial connection load circuit of tongue tube GK; the time-delay utmost point 1 electricity with control module ZFB is connected between capacitor C 2 and the diode D5; the control utmost point 2 electricity of control module ZFB connect between the resistance R 2 and R3 of series connection bleeder circuit; the promotion utmost point 3 electricity of control module ZFB connect the base stage of triode BG; negative pole 4 electricity of control module ZFB connect the emitter of triode BG and the negative pole of dc supply; the coil of the collector series relay J of triode BG; as shown in Figure 1; between the time-delay utmost point 1 of the collector electrode of triode BG and control module ZFB, be connected in series diode D6; on load power source and connect the fault display circuit that normally closed contact JK series resistor R5 and light-emitting diode hectare XD1 by relay J constitute, and and connect the operating state display circuit that normal opened contact JK series resistor R6 and light-emitting diode XD2 by relay J constitute.The course of work of the present utility model is: after serving power supply; 1 of protector; 2 input termination AC supply voltage; its output 3 connects load; the output of low-voltage direct working power is arranged on the output of rectification circuit Z this moment, and capacitor C 2 begins charging, when charging is initial; because capacitor C 2 suitable short circuits; on the time-delay utmost point 1 of its control module ZFB high potential is arranged, the promotion utmost point 3 of ZFB and negative pole 4 are connected, make the base stage of triode BG be connected to negative potential; triode BG ends; the relay J outage, its normal opened contact JK disconnects, and load circuit disconnects; the time-delay utmost point 1 of control module ZFB becomes negative potential after finishing along with capacitor C 2 chargings; this moment control module ZFB 3; disconnect between 4 pin, the base stage of triode BG provides bias current and conducting by resistance R 4, the relay J adhesive; its normal opened contact JK adhesive, load circuit is connected power supply.When the load circuit overcurrent, the junction closure of tongue tube GK, capacitor C 2 discharges, positive potential appears on the time-delay utmost point 1 of control module ZFB, connect and make between 3,4 pin of ZFB, the base stage of triode BG connects negative potential, and BG is ended, the relay J dead electricity, its normal opened contact JK disconnects, and cuts off load circuit, behind failure removal, capacitor C 2 begins charging, repeats said process again.When the load circuit overvoltage,, the current potential of the control utmost point 2 of ZFB is risen, and 3,4 pin of ZFB are connected because the pressure-dividing output voltage of series connection bleeder circuit R2, R3 rises; triode BG ends, the relay J outage, and its normal opened contact JK disconnects; and make the load circuit outage, play the overvoltage protection effect.After overvoltage disappeared, because of the 2 pin high potentials disappearance of ZFB, 3,4 pin disconnected, the BG conducting, and the relay J adhesive recovers the load circuit power supply.Diode D6 is when preventing voltage ripple of power network, and the protector misoperation improves its reliability.

Claims (1)

1; a kind of comprehensive family non-electricity protector; it comprises that step-down transformer T output meets rectification circuit Z and filter capacitor C1; it is characterized in that at the output of rectification circuit Z and connect the delayed startup circuit formed by capacitor C 2 serial connection diode D5 and and connect the overvoltage crowbar that constitutes by resistance R 2 series resistor R3; at the two ends of capacitor C 2 and connect the current foldback circuit that the contact series resistor R1 by tongue tube GK constitutes; the coil G of tongue tube GK is serially connected in the load circuit; the time-delay utmost point 1 of control module ZFB connects between capacitor C 2 and the diode D5; the control utmost point 2 of control module ZFB connects between the resistance R 2 and R3 of overvoltage crowbar; the promotion utmost point 3 of the base stage link control module ZFB of triode BG; the coil of its collector series relay J; the negative pole 4 of its emitter link control module ZFB; and the cathode output end that connects rectification circuit Z; be connected in series diode D6 between the time-delay utmost point 1 of the collector electrode of triode BG and control module ZFB, the normal opened contact JK of relay J is serially connected in the load circuit.