An energy-saving circuit for an extension cord socket

Abstract

The utility model provides a kind of for extension cord socket or energy-saving circuit with similar structural features, especially suitable for the extension cord socket with multiple positions, and each position is separately controlled, scheme refers to indicator light using light emitting diode (LED), first all power indicator light is connected together to the one end of zero line, then pass through a rectifier diode zero line, the rectification current direction of rectifier diode and the light emitting current direction of power indicator light are same, so that current forward conduction LED emits light;Rectifier diode makes reverse current cut-off, avoids power loss, and can save nearly half of the power of indicator light circuit.The utility model has the advantages of simple structure, low cost, high reliability, strong practicability, good economic and social benefits.

Description

Technical Field

[0001] This utility model provides an indicator light circuit for an AC power extension cord socket, particularly an extension cord socket with a multi-position switch and using light-emitting diodes (LEDs) as power indicators, which relates to energy-saving technology for extension cord sockets. Background Technology

[0002] Extension cord sockets typically have a power indicator light to show whether there is power. Some extension cord sockets have multiple power indicators, each with its own switch and indicator light. Currently, the common design for power indicator lights on sockets is to use an LED connected in series with a resistor between the neutral and live wires. The resistor limits the current flowing through the LED, which lights up when forward-biased, indicating that there is power. Since alternating current voltage alternates between positive and negative, when the voltage direction changes, the current direction through the LED also changes. However, tests have shown that reverse current through the LED does not cause it to light up. Because the frequency of alternating current is generally 50 Hz or 60 Hz, the LED on the socket flashes on and off alternately. Due to the high frequency of alternating current, the human eye, due to visual persistence, does not perceive the flickering of the LED; it appears constantly lit when there is power and not lit when there is no power.

[0003] The reverse current passing through the LED does not cause it to light up and therefore is a waste of energy. By disassembling extension cord sockets on the market, it was found that the current-limiting resistor is about 200 kΩ and the reverse breakdown voltage of the LED is about 20V~40V. Calculations show that if the power indicator light is powered on for a year, the power consumed in one indicator light circuit is about 1.9 kWh, of which nearly half of the power is wasted. For extension cord sockets with multiple LED indicators, the power loss is even greater. Summary of the Invention

[0004] The purpose of this utility model is to provide a low-energy-consumption, high-efficiency, and environmentally friendly extension cord socket power indicator circuit structure.

[0005] The technical solution for the circuit structure is as follows: Each power indicator circuit includes a light-emitting diode and a resistor. The light-emitting diode is connected to the resistor to form a series power indicator circuit. All the power indicator circuits of the holes are connected together at the neutral wire end, and then connected to the mains neutral wire through a rectifier diode. The direction of the rectified current of the rectifier diode is the same as the direction of the light-emitting current of the light-emitting diode. The other end of each power indicator circuit is connected to the mains live wire through a switch.

[0006] This utility model has the advantages of simple process, high reliability, low total cost of use for users, energy saving and environmental protection.

[0007] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods. Attached Figure Description

[0008] Figure 1 , Figure 2 , Figure 3 This is a circuit diagram for a four-position power indicator light, using discrete components.

[0009] In the diagram, D1, D2, D3, and D4 are power indicator lights; R1, R2, R3, and R4 are resistors; D5 is a rectifier diode; and S1, S2, S3, and S4 are the switches for holes J1, J2, J3, and J4, respectively. Implementation

[0010] like Figure 1 In the illustrated embodiment, the indicator lights for the four holes have the same structure. Taking one hole, J1, as an example, its power indicator light D1 uses a light-emitting diode. The anode of D1 is connected in series with a resistor R1, and D1 and R1 form a power indicator light circuit. One end of the power indicator light circuit, R1, is connected to the live wire (L) of the mains through a switch S1. The other end of the power indicator light circuit, the cathode side of D1, is connected to the cathodes of the other holes, D2, D3, and D4, and then connected to the anode of the rectifier diode D5. The cathode of D5 is connected to the neutral wire (N) of the mains. D5 uses a diode of type 1N4007. The direction of the rectified current of D5 is consistent with the direction of the light-emitting current of D1, D2, D3, and D4. In this way, the indicator lights D1, D2, D3, and D4 can be powered on and illuminate during the half-cycle of AC power, and de-energized during the other half-cycle to save energy.

[0011] The order of resistors R1 and D1 is not required; their positions can be interchanged, such as... Figure 2 As shown.

[0012] Alternatively, one can use, such as Figure 3 The circuit structure is such that the direction of rectifier diode D5 is reversed compared to that of power indicator lights D1, D2, D3, and D4, ensuring that the direction of the rectified current of D5 is consistent with the direction of the light-emitting current of D1, D2, D3, and D4.

[0013] The connection scheme for power indicator D2 and resistor R2 in hole J2, power indicator D3 and resistor R3 in hole J3, and power indicator D4 and resistor R4 in hole J4 is the same as that for J1. All four power indicator lights share a single rectifier diode D5.

[0014] The above technical solution can be applied to extension cord socket structures with other numbers of holes. The specific number of holes is limited by the current flow of the rectifier diode D5. D5 uses a 1N4007 rectifier diode, which can provide a continuous current of up to 1 A and can be used in structures with hundreds or even thousands of holes.

[0015] In the specific implementation process, relevant technical personnel can select appropriate component models or specifications based on the basic theories of electrical engineering.

Claims

1. An energy-saving circuit for multi-position extension cord sockets, characterized in that: Each socket includes a power indicator circuit consisting of a resistor and a light-emitting diode (LED) connected in series. One end of each indicator circuit is connected to the mains live wire via a switch, and the other ends of all indicator circuits are connected together and then connected to the mains neutral wire via a rectifier diode. The direction of the rectified current of the rectifier diode is the same as the direction of the light-emitting current of the LED.

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