CN202494891U - Standby power-saving control circuit device for household air conditioner - Google Patents

Abstract

The utility model discloses a household air conditioner standby power-saving control circuit device. A household air conditioner standby power-saving system consisting of an infrared receiving circuit, an inverting circuit, an isolation and current limiting circuit, a voltage doubler rectifier circuit, a filter circuit, a voltage comparison circuit, an optocoupler thyristor circuit, an electronic switch, and a power supply circuit. Control circuit. The control circuit is connected in series with the power socket of the air conditioner, and the control circuit automatically cuts off the AC power supply of the air conditioner about 1 minute after the remote control of the air conditioner is turned off, so that the air conditioner does not consume electricity at all, and also completely isolates the air conditioner from the power grid, thereby protecting the air conditioner. The structure is simple and easy to use, as long as the power control key of the remote control of the air conditioner is pressed twice, the air conditioner can be turned on. The standby power consumption of the control circuit is less than 1W than that of the air conditioner, which can save electric energy. At the same time, it saves the trouble of unplugging/plugging the power plug, and protects the old people or children from falling down due to unplugging/plugging the power plug, causing personal injury, and is widely used in household air conditioners.

Description

A household air conditioner standby power-saving control circuit device

technical field

The utility model relates to a control circuit for standby power consumption of an air conditioner, in particular to a standby power saving control circuit device for a household air conditioner.

Background technique

For the sake of safety, the sockets of the existing household air conditioners are generally installed at a position higher than the ground. In order to eliminate the standby power consumption of the air conditioner, people often have to stand on the bench to pull out the plug of the air conditioner after the remote control shutdown. When you need to turn on the air conditioner, you have to stand on the bench to plug in the plug, which is quite troublesome, especially for empty nesters or when there are old people and children at home. Falling, causing bodily injury defects.

Contents of the invention

The purpose of this utility model is to provide a kind of simple structure, easy to use, about 1 minute after the remote control of the air conditioner is turned off, the AC power supply of the air conditioner is automatically cut off, so that the air conditioner does not consume electricity at all, and also completely isolates the air conditioner from the power grid. A kind of household air conditioner standby Power saving control circuit device.

A household air conditioner standby power-saving control circuit device, the control circuit device is composed of a power supply circuit, an optocoupler thyristor circuit, a voltage comparison circuit, a reference voltage, a filter circuit, an isolation and current limiting circuit, a voltage doubler rectifier circuit, and an inverting circuit , an infrared receiving circuit, a sampling and voltage limiting circuit, an electronic switch, and a load. The utility model is special in that the bypass of the A terminal of the power supply circuit is connected to one end of the load, and the other end of the load is connected to one end of the electronic switch. The other end of the electronic switch is connected to one end of the sampling and voltage limiting circuit, the sampling and voltage limiting circuit is respectively connected to the B end of the power supply circuit and one end of the voltage doubler rectifier circuit, and the other end of the voltage doubler rectifier circuit is connected to one end of the filter circuit , the other end of the filter circuit is connected to one end of the voltage comparison circuit, the other end of the voltage comparison circuit is respectively connected to the optocoupler thyristor circuit and the reference voltage, and the other end of the optocoupler thyristor circuit is connected to the electronic switch, so The infrared receiving circuit is connected to the inverting circuit, the inverting circuit is connected to the isolation and current limiting circuit, the isolation and current limiting circuit is connected to the filter circuit, and the other end of the power supply circuit outputs 6V and 3.4V voltages respectively.

The power supply circuit is composed of a step-down capacitor C1, a resistor R1, a voltage stabilizing diode D2, a rectifier diode D1, a drop-down resistor R2, and filter capacitors C2, C3, and C4 connected to each other.

The isolation and current limiting circuit is composed of a diode D8 connected to a resistor R6.

The sampling and voltage limiting circuit consists of a sampling resistor R4 and diodes D3 and D4 to form a voltage stabilizing circuit.

The voltage doubler rectifier circuit is composed of diodes D5, D6, capacitors C5, C6, C7, and resistor R5.

The voltage comparison circuit consists of a voltage comparator IC2b. Resistors R6, R8. And light-emitting diode LED connection composition.

The electronic switch is composed of two-way controllable silicon Q1 connected with a capacitor C5.

The optocoupler thyristor circuit is composed of IC1, R7 and R3.

Compared with the prior art, the utility model has the advantages of simple structure and convenient use. About 1 minute after the remote control of the air conditioner is turned off, the AC power supply of the air conditioner is automatically cut off, so that the air conditioner does not consume electricity at all, and the air conditioner is completely isolated from the power grid, thereby protecting the air conditioner. . The standby power consumption of the control circuit is much smaller than the standby power consumption of the air conditioner, and can be no greater than 1W, so electric energy can be saved. At the same time, it saves the trouble of unplugging/plugging the power plug, and protects the defect that the old people or children fall down due to unplugging/plugging the power plug, causing personal injury.

Description of drawings

Fig. 1 is a schematic block diagram of the circuit structure of the utility model;

FIG. 2 is a schematic schematic diagram of the circuit structure in FIG. 1 .

Detailed ways

Accompanying drawing is embodiment of the utility model.

Below in conjunction with accompanying drawing, the content of the invention is further described:

Referring to Figure 1, a household air conditioner standby power-saving control circuit device consists of a power supply circuit, an optocoupler thyristor circuit, a voltage comparison circuit, a reference voltage, a filter circuit, an isolation and current limiting circuit, a voltage doubler rectifier circuit, an inverting circuit, an infrared receiving circuit, a sampling and voltage limiting circuit, an electronic switch, and a load. The bypass of the A terminal of the power supply circuit 1 is connected to one end of the load 12, and the other end of the load 12 is connected to one end of the electronic switch 11. The electronic The other end of the switch 11 is connected to one end of the sampling and voltage limiting circuit 10, the sampling and voltage limiting circuit 10 is respectively connected to the B end of the power supply circuit 1 and one end of the voltage doubler rectifier circuit 7, and the other end of the voltage doubler rectifier circuit 7 is connected to the filter One end of the circuit 5 is connected, the other end of the filter circuit 5 is connected to one end of the voltage comparison circuit 3, the other end of the voltage comparison circuit 3 is respectively connected to the optocoupler thyristor circuit 2 and the reference voltage 4, and the optocoupler thyristor The other end of the circuit 2 is connected to the electronic switch 11, the infrared receiving circuit 9 is connected to the inverter circuit 8, the inverter circuit 8 is connected to the isolation and current limiting circuit 6, and the isolation and current limiting circuit 6 is connected to the filter circuit 5 connected, the other end of the power supply circuit 1 outputs voltages of 6V and 3.4V respectively.

Fig. 2 is the schematic circuit diagram of Fig. 1, and the power circuit is composed of step-down capacitor C1, resistor R1, voltage regulator diode D2, rectifier diode D1, step-down resistor R2, and filter capacitors C2, C3, and C4 connected to each other.

The isolation and current limiting circuit is composed of a diode D8 connected to a resistor R6.

The sampling and voltage limiting circuit consists of a sampling resistor R4 and diodes D3 and D4 to form a voltage stabilizing circuit.

The voltage doubler rectifier circuit is composed of diodes D5, D6, capacitors C5, C6, C7, and resistor R5.

The voltage comparison circuit consists of a voltage comparator IC2b. Resistors R6, R8. And light-emitting diode LED connection composition.

The electronic switch is composed of two-way controllable silicon Q1 connected with a capacitor C5.

The optocoupler thyristor circuit is composed of IC1, R7 and R3.

AC220V voltage is applied to ports A and B, and flows through the sampling resistor R1 and bidirectional thyristor Q1 to supply power to the load.

At the same time, the AC220V voltage passes through the power supply circuit to obtain two voltages to supply power for the control circuit. One 6V voltage is used as the working voltage of the control circuit, and the other is stepped down by R2 and filtered by C4 to obtain +3.4V voltage, which is used as the working voltage of the infrared receiving circuit.

In static state, the infrared receiving head IC (3) pin is high potential +3.4V. That is, the negative input pin of the voltage comparator IC2a is 3.4V, while the reference voltage of the non-inverting terminal is low, and IC2a outputs a low potential. When static, the input pin of IC2b is also low potential, and its inverting terminal V6 is about 0.16V, so IC2b outputs low potential, the optocoupler IC1 is cut off, the main thyristor BTA is cut off because there is no trigger power supply, the socket Z is not powered, and the air conditioner is off.

remote start

Press the ON key (red key) on the remote control of the air conditioner, and a series of infrared pulse signals will be generated on the remote control. After the infrared receiving head receives the infrared pulse signal, it will be amplified internally, demodulated and adjusted, and output a series of negative pulse signals, which will be added to the inverting input terminal of IC2a. The output terminal of IC2a outputs a series of positive pulse signals, and the positive pulse signal charges the electrolytic capacitor C7 through the diode D8 and the current limiting resistor R6, so that the voltage of the positive input terminal of IC2b continues to rise, when the voltage of the positive input terminal is higher than the reverse input terminal terminal voltage. IC2b outputs a high potential, the light-emitting diode LED lights up, the optocoupler thyristor IC1 conducts, the main thyristor Q1 obtains the trigger current and conducts, the air conditioner socket is powered, and the air conditioner is in a standby state.

It can be seen that the key is actually to start the circuit when the button is pressed for the first time. At this time, press the ON/OFF button on the remote control again, and the air conditioner will enter the normal operation state and start cooling. When the air conditioner is in operation, the current is relatively large. After the AC voltage drop generated on the sampling resistor R4 is limited by the diodes D3 and D4, the voltage drop on the resistor R4 is about 0.7V (measured 0.9V), which can reduce the sampling resistor R4. rated power. After the voltage drop is doubled, rectified and filtered, it is added to the positive input terminal of IC2b, and the voltage is greater than the reference voltage at the inverting terminal. Therefore, IC2b maintains a high output potential to maintain the optocoupler thyristor IC1 and the main thyristor Q1 to continue conducting, and to maintain the normal operation of the air conditioner. This is the start-up process of the air conditioner.

When the remote control is used to remotely shut down the air conditioner, the air conditioner enters the standby state. At this time, the current flowing through the resistor R4 is very small, the measured current on R is very small, and the measured AC voltage drop on R is 0.05V. At this time, the diode D6 is reverse-biased, and all the charges on the capacitor C6 are discharged through the resistor R5. After about 1 minute, the voltage of the forward input terminal of IC2b drops below the reverse input terminal. IC2b outputs a low potential, and the LED is turned off, and the optocoupler The thyristor is turned off, Q1 is cut off, the load power supply is completely cut off, and the control circuit is connected in series with the power socket of the air conditioner for safe use.

Claims (8)

1. domestic air conditioning stand-by energy-saving control circuit device; This control circuit device is made up of power circuit, optocoupler ghyristor circuit, voltage comparator circuit, reference voltage, filtering circuit, isolation and current-limiting circuit, voltage doubling rectifing circuit, negative circuit, infrared receiving circuit, sampling and pressure limiting circuit, electronic switch, load; The bypass that it is characterized in that the A end of said power circuit (1) is connected with load (12) one ends; Said load (12) other end is connected with electronic switch (11) one ends; Said electronic switch (11) other end is connected with pressure limiting circuit (10) one ends with sampling; Said sampling is connected with voltage doubling rectifing circuit (7) one ends with the B end of power circuit (1) respectively with pressure limiting circuit (10); Said voltage doubling rectifing circuit (7) other end is connected with filtering circuit (5) one ends; Said filtering circuit (5) other end is connected with voltage comparator circuit (3) one ends, and said voltage comparator circuit (3) other end is connected with reference voltage (4) with optocoupler ghyristor circuit (2) respectively, and said optocoupler ghyristor circuit (2) other end is connected with electronic switch (11); Said infrared receiving circuit (9) is connected with negative circuit (8); Said negative circuit (8) is connected with current-limiting circuit (6) with isolation, and said isolation is connected with filtering circuit (5) with current-limiting circuit (6), and said power circuit (1) other end is exported 6V and 3.4V voltage respectively.

2. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1; It is characterized in that said power circuit by decompression capacitor C1, resistance R 1, voltage stabilizing diode D2, commutation diode D1, dropping resistor R2, and filter capacitor C2, C3, C4 interconnect composition.

3. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1 is characterized in that said isolation and current-limiting circuit are connected to form by diode D8 and resistance R 6.

4. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1 is characterized in that said sampling and pressure limiting circuit by sample resistance R4, and diode D3, D4 form mu balanced circuit.

5. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1 it is characterized in that said voltage doubling rectifing circuit by diode D5, D6 and capacitor C 5, C6, C7, and resistance R 5 connects to form.

6. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1 is characterized in that said voltage comparator circuit is by voltage comparator ic 2b; Resistance R 6, R8; And LED connects to form.

7. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1 is characterized in that said electronic switch is connected to form by silicon symmetrical switch Q1 and capacitor C 5.

8. a kind of domestic air conditioning stand-by energy-saving control circuit device according to claim 1 is characterized in that said optocoupler ghyristor circuit is connected to form by IC1, R7, R3.

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