CN211127152U - Intelligent power saving device for household appliances - Google Patents
Intelligent power saving device for household appliances Download PDFInfo
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- CN211127152U CN211127152U CN201922441613.XU CN201922441613U CN211127152U CN 211127152 U CN211127152 U CN 211127152U CN 201922441613 U CN201922441613 U CN 201922441613U CN 211127152 U CN211127152 U CN 211127152U
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- power
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- power factor
- current
- household appliance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a domestic appliance intelligence power saving device, include: the current and voltage detection unit is used for monitoring the voltage and the current of the household appliance in real time; the power calculating unit calculates the power and the power factor of the household appliance according to the detected voltage and current; the power factor compensation unit comprises a capacitor and a control circuit thereof and is used for compensating the power factor; the relay unit is used for controlling the household appliance to be powered on or powered off; the microprocessor unit is used for controlling the working process of the units, reading the power and power factor data calculated by the power calculation unit, judging whether the household appliance is in a running state or a standby state according to the power data, and outputting a control signal for keeping power on or off to the relay; calculating capacitance to be compensated or cut according to the power factor data, and outputting a control signal for putting in or cutting off a capacitor with corresponding capacitance to the power factor compensation unit; and the power supply unit is used for providing operating power supply for the device.
Description
Technical Field
The utility model belongs to the technical field of energy-conservation, a domestic appliance power saving device is related to.
Background
Most household appliances are inductive loads, the power factor is low during operation, the line loss of a power grid is increased due to reactive current, and electric energy is wasted, so that a household power saving device aiming at the problem appears. However, directly inputting a capacitor with a fixed capacity may cause overcompensation of the power factor, resulting in an inverse drop in the power factor. In addition, the operation habits of people also have influence on electricity saving, for example, the operation habits of people are that the television is turned off by using the remote control panel, but the power switch of the television is not turned off, the television is in a standby state, and the electricity is consumed.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides an intelligent power saving device for household appliances, which can compensate the capacitance with corresponding capacity according to the actual power factor of the household appliances, and not only does not lack compensation, but also does not compensate too much; the household appliance can be judged to be in the running state or the standby state, and the power supply switch is controlled to be switched on or switched off, so that standby power consumption is avoided. The technical solution is as follows:
an intelligent power saving device for household appliances, characterized in that the device comprises:
-a current, voltage detection unit for real-time monitoring of the voltage and current at the time of use of the household appliance;
-a power calculating unit calculating power and power factor of the household appliance according to the detected voltage and current;
-a power factor compensation unit comprising a capacitor and its control circuit for compensating the power factor;
-a relay unit for controlling the household appliance to be powered on or off;
a microprocessor unit for controlling the working process of the above-mentioned units, including reading the power and power factor data calculated by the power calculation unit, judging whether the household appliance is in an operation state or a standby state according to the power data, and outputting a control signal for keeping the power on or off to the relay; calculating capacitance to be compensated or cut according to the power factor data, and outputting a control signal for putting in or cutting off a capacitor with corresponding capacitance to the power factor compensation unit;
-a power supply unit for providing operating power to the apparatus.
The current detection circuit of the current and voltage detection unit adopts an alloy resistor with 20 milliohm and 1 watt to be connected with a load in series, two ends of the resistor are connected to a current input end of the power calculation unit, the voltage detection circuit adopts a resistor voltage division mode, 3 resistors with the precision of one thousandth of 470 kilo ohm are connected between a live wire and a zero line in parallel, and a voltage signal on the resistor directly connected with the zero line is obtained from the parallel resistor.
The power calculation unit adopts an integrated chip CS 5463.
The power factor compensation unit is composed of a plurality of compensation circuits, and each compensation circuit is provided with a capacitor and a control circuit thereof.
The utility model has the advantages that:
the device is intelligent, can compensate the capacitance with corresponding capacity according to the actual power factor of the household appliance, and does not compensate under or under; the household appliance can be judged to be in the running state or the standby state, and the power supply switch is controlled to be switched on or switched off, so that standby power consumption is avoided, and the maximum possible power saving is realized.
Drawings
Fig. 1 is a block diagram of the hardware circuit system of the present invention.
Fig. 2 is a schematic circuit diagram of the voltage and current detection and power calculation unit of the present invention.
Fig. 3 is a schematic circuit diagram of a power factor compensation unit.
Fig. 4 is a schematic diagram of a power factor compensation circuit of fig. 3.
Fig. 5 is a schematic diagram of a microprocessor controlled outlet.
Detailed Description
The embodiment shown in fig. 1 is the utility model discloses a hardware circuitry block diagram, in fig. 1, the live wire L of input single phase power supply (1), zero line N, be connected to output socket (3) through relay (2), domestic appliance's power plug can insert output socket (3), power supply and outage through relay (2) control domestic appliance, voltage detection unit (4) connect in parallel between live wire and zero line, current detection unit (5) establish ties on the live wire, power factor compensation unit (6) connect in parallel between live wire and zero line, power calculation unit (7) are sent into to the voltage of voltage detection unit (4) output and the voltage value of current detection unit (5) output, the serial port bus of power calculation unit (7) is connected to the SPI port of microprocessor (8), microprocessor (8) are through P1.3 mouthful control relay (2), thereby the power supply and the outage of control output socket (3).
In the embodiment shown in fig. 2, R1, R2, R3, R4, R5, R6, R form a voltage detection unit circuit, the voltage between R6 and the zero line N is taken and sent to VIN + and VIN-of the power calculation unit chip CS5463, one end of the current sampling resistor is connected to PN, the other end of the current sampling resistor is connected to PI +, the voltages at the two ends are sent to IIN + and IIN-of the CS5463, the power calculation unit circuit core chip CS5463 performs power and power factor calculation through the sampled voltages and currents, the calculation result is sent to the microprocessor through SDI and SDO, and the microprocessor controls the power factor compensation unit to perform switching of the capacitor so as to compensate the power factor.
In fig. 3, the power compensation unit (6) is composed of six compensation circuits, and the structure of each compensation circuit is shown in fig. 4.
In fig. 4, a compensation capacitor C334 and triacs BT138-600E are connected between a live wire L and a zero wire N, the C334 and the triacs BT138-600E are connected in series, the conduction of the triacs BT138-600E depends on whether an optocoupler U1 MC3036 is conducted, when an output signal RE L AY1 from a microprocessor is in a low level, an optocoupler U1 is conducted, namely a pin 6 to a pin 4 of a U1 are conducted, the triac BT138-600E is triggered to conduct, and the compensation capacitor is connected in parallel between the live wire L and the zero wire N, so that power factor compensation is performed on a load.
In fig. 1, the microprocessor (8) outputs 6 control signals RE L AY1, RE L AY2, RE L AY3, RE L AY4, RE L AY5 and RE L AY6, and controls the capacitors C2, C4, C6, C8, C10 and C12 of the 6 groups of power compensation circuits in fig. 3, so that the capacitors are intelligently switched according to the actual power factor of the load to achieve the optimal compensation effect.
In fig. 5, the microprocessor controls the relay (2) in fig. 1 according to the current data read from CS5463, thereby controlling the on/off of the output socket (3), and when the current detected by the current detection circuit in fig. 2 is less than a certain set standby current, the microprocessor opens the relay, thereby cutting off the standby power consumption of the load and realizing the maximum possible power saving.
Claims (4)
1. An intelligent power saving device for household appliances, characterized in that the device comprises:
-a current, voltage detection unit for real-time monitoring of the voltage and current at the time of use of the household appliance;
-a power calculating unit calculating power and power factor of the household appliance according to the detected voltage and current;
-a power factor compensation unit comprising a capacitor and its control circuit for compensating the power factor;
-a relay unit for controlling the household appliance to be powered on or off;
a microprocessor unit for controlling the working process of the above-mentioned units, including reading the power and power factor data calculated by the power calculation unit, judging whether the household appliance is in an operation state or a standby state according to the power data, and outputting a control signal for keeping the power on or off to the relay; calculating capacitance to be compensated or cut according to the power factor data, and outputting a control signal for putting in or cutting off a capacitor with corresponding capacitance to the power factor compensation unit;
-a power supply unit for providing operating power to the apparatus.
2. The intelligent power saving device for household appliances according to claim 1, wherein the current detection circuit of the current and voltage detection unit is connected in series with the load by using an alloy resistor of 20 milliohm and 1 watt, two ends of the resistor are connected to the current input end of the power calculation unit, the voltage detection circuit is connected in parallel between the live wire and the zero wire by using a resistor voltage division mode, 3 resistors of 470 kiloohm with the accuracy of one thousandth are connected in parallel between the live wire and the zero wire, and a voltage signal on the resistor directly connected with the zero wire is taken from the parallel resistor.
3. The intelligent power saving device for household appliances according to claim 1, wherein the power calculating unit employs an integrated chip CS 5463.
4. The intelligent power saving device for household appliances according to claim 1, wherein the power factor compensation unit is composed of a plurality of compensation circuits, each compensation circuit having a capacitor and its control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922441613.XU CN211127152U (en) | 2019-12-30 | 2019-12-30 | Intelligent power saving device for household appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922441613.XU CN211127152U (en) | 2019-12-30 | 2019-12-30 | Intelligent power saving device for household appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211127152U true CN211127152U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922441613.XU Active CN211127152U (en) | 2019-12-30 | 2019-12-30 | Intelligent power saving device for household appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211127152U (en) |
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2019
- 2019-12-30 CN CN201922441613.XU patent/CN211127152U/en active Active
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