CN213637197U - Small household appliance control circuit board with multiple interlocking protection function - Google Patents
Small household appliance control circuit board with multiple interlocking protection function Download PDFInfo
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- CN213637197U CN213637197U CN202023145918.5U CN202023145918U CN213637197U CN 213637197 U CN213637197 U CN 213637197U CN 202023145918 U CN202023145918 U CN 202023145918U CN 213637197 U CN213637197 U CN 213637197U
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Abstract
The utility model discloses a small household appliances control circuit board with multiple interlocking protect function, including voltage input circuit, voltage detection circuit, the control unit microprocessor, first switch circuit, second switch circuit, electric power storage circuit and load RL, voltage input circuit's input termination commercial power input, voltage detection circuit's input and voltage input circuit's output electric connection. According to the small household appliance control circuit board with the multiple interlocking protection function, the voltage detection circuit is used for detecting the voltage state, and the relay KM1 and the relay KM2 are used for interlocking control, so that a stable power supply can be provided for the load RL, and the load RL is protected.
Description
Technical Field
The utility model relates to a little household electrical appliances power consumption control technology field specifically is a little household electrical appliances control circuit board with multiple interlocking protect function.
Background
The existing power grid voltage fluctuation is large, the small household appliances have poor anti-interference capability on voltage and current fluctuation, and the fluctuation of the power grid voltage and the current influences the use of the small household appliances, so that the stability of an input power supply needs to be controlled before the small household appliances are connected to a power supply for use so as to protect the small household appliances.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a little household electrical appliances control circuit board with multiple interlocking protect function, detectable input voltage state through relay KM1 and relay KM2 interlocking control, can provide stable power supply for load RL, protects load RL, has solved the problem among the prior art.
In order to achieve the above object, the utility model provides a following technical scheme: a small household appliance control circuit board with multiple interlocking protection functions comprises a voltage input circuit, a voltage detection circuit, a control unit microprocessor, a first switch circuit, a second switch circuit, an electric storage circuit and a load RL, wherein the input end of the voltage input circuit is connected with mains supply input, the input end of the voltage detection circuit is electrically connected with the output end of the voltage input circuit, and the output end of the voltage input circuit is electrically connected with the input end of the control unit microprocessor; the input end of the first switch circuit is electrically connected with the output end of the voltage input circuit, the output end of the first switch circuit is electrically connected with the load RL, the input end of the electric storage circuit is electrically connected with the output end of the voltage input circuit, the output end of the electric storage circuit is electrically connected with the input end of the second switch circuit, and the output end of the second switch circuit is electrically connected with the load RL; the first switch circuit and the second switch circuit are electrically connected with the output end of the control unit microprocessor.
Preferably, the voltage detection circuit comprises a resistor R1-a resistor R6, a transistor Q1 and a capacitor C1, wherein the input end of the resistor R1 is connected with the positive output end of the voltage input circuit, the output end of the resistor R1 is electrically connected with the base of the transistor Q1, the collector of the transistor Q1 is connected to the output end of the resistor R3 and connected to the input end of the resistor R4, and the input end of the resistor R3 is connected to the negative output end of the voltage input circuit; the output end of the resistor R4 is connected to the input end of the resistor R6, connected to the input end of the resistor R5 and connected to the emitter of the triode Q1, and the emitter of the triode Q1 is connected to the negative output end of the voltage input circuit; the output terminal of the resistor R6 is connected to the input terminal of the capacitor C1 and to the input terminal of the control unit microprocessor, and the output terminal of the capacitor C1 is grounded.
Preferably, the control unit microprocessor adopts a control chip U1, the model of the control chip U1 is STM32F, and a pin 32 of the control chip U1 is electrically connected with the output end of the resistor R6.
Preferably, the first switch circuit comprises a breaker QF1, a resistor R7 and a relay KM1, an input end of the breaker QF1 is electrically connected with an anode output end of the voltage input circuit, an output end of the breaker QF1 is electrically connected with an input end of the relay KM1, an output end of the relay KM1 is electrically connected with an input end of the resistor R7, an output end of the resistor R7 is electrically connected with an input end of a load RL, an output end of the load RL is electrically connected with a cathode output end of the voltage input circuit, and a control end of the relay KM1 is electrically connected with a pin 6 of the control chip U1.
Preferably, the positive input end of the electric storage circuit is electrically connected with the positive output end of the voltage input circuit, and the negative end of the electric storage circuit is electrically connected with the negative output end of the voltage input circuit; the second switch circuit comprises a breaker QF2 and a relay KM2, wherein the input end of the breaker QF2 is electrically connected with the positive electrode of the electric storage circuit, the output end of the breaker QF2 is electrically connected with the input end of the relay KM2, the output end of the relay KM2 is electrically connected with the input end of a load RL, and the output end of the load RL is electrically connected with the negative electrode of the electric storage circuit.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the small household appliance control circuit board with the multiple interlocking protection function is characterized in that a voltage detection circuit detects the power supply state of a power supply, when the power supply is normal, a triode Q1 is in saturated conduction, a conduction signal is sent to a control chip U1, the control chip U1 controls a relay KM1 to be closed after obtaining the signal, a control relay KM2 is disconnected, a load RL is directly connected to a voltage input circuit and is supplied with power through commercial power, when the power supply is cut off or the voltage is abnormal, the triode Q1 is in a non-conduction state, the control chip U1 controls the relay KM1 to be disconnected after obtaining the signal by the control chip U1, an electric storage circuit is adopted to supply power to the load RL, so that the load RL7 works normally, when the voltage is normal, the control relay KM2 is disconnected, the control relay KM1 is closed, the power supply is normally adopted, the voltage state is detected by the voltage detection circuit, the interlocking control is carried out through the, the load RL is protected.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a wiring diagram of the control chip U1 of the present invention.
In the figure: 1. a voltage input circuit; 2. a voltage detection circuit; 3. a control unit microprocessor; 4. a first switching circuit; 5. a second switching circuit; 6. an electric storage circuit; 7. the load RL.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, a small household appliance control circuit board with multiple interlock protection function includes a voltage input circuit 1, a voltage detection circuit 2, a control unit microprocessor 3, a first switch circuit 4, a second switch circuit 5, a storage circuit 6 and a load RL7, wherein the input end of the voltage input circuit 1 is connected with the mains supply input, the input end of the voltage detection circuit 2 is electrically connected with the output end of the voltage input circuit 1, and the output end of the voltage input circuit 1 is electrically connected with the input end of the control unit microprocessor 3; the input end of the first switch circuit 4 is electrically connected with the output end of the voltage input circuit 1, the output end of the first switch circuit 4 is electrically connected with the load RL7, the input end of the electric storage circuit 6 is electrically connected with the output end of the voltage input circuit 1, the output end of the electric storage circuit 6 is electrically connected with the input end of the second switch circuit 5, and the output end of the second switch circuit 5 is electrically connected with the load RL 7; the first switch circuit 4 and the second switch circuit 5 are electrically connected with the output end of the control unit microprocessor 3.
As a further aspect of the present invention: the voltage detection circuit 2 comprises a resistor R1-a resistor R6, a triode Q1 and a capacitor C1, wherein the input end of the resistor R1 is connected with the positive electrode output end of the voltage input circuit 1, the output end of the resistor R1 is electrically connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with the output end of the resistor R3 and the input end of the resistor R4, and the input end of the resistor R3 is connected with the negative electrode output end of the voltage input circuit 1; the output end of the resistor R4 is connected to the input end of the resistor R6, connected to the input end of the resistor R5 and connected to the emitter of the triode Q1, and the emitter of the triode Q1 is connected to the negative output end of the voltage input circuit 1; the output of the resistor R6 is connected to the input of the capacitor C1 and to the input of the control unit microprocessor 3, and the output of the capacitor C1 is connected to ground.
As a further aspect of the present invention: the control unit microprocessor 3 adopts a control chip U1, the model of the control chip U1 is STM32F, and a pin 32 of the control chip U1 is electrically connected with the output end of the resistor R6.
As a further aspect of the present invention: the first switch circuit 4 comprises a breaker QF1, a resistor R7 and a relay KM1, wherein the input end of the breaker QF1 is electrically connected with the positive output end of the voltage input circuit 1, the output end of the breaker QF1 is electrically connected with the input end of the relay KM1, the output end of the relay KM1 is electrically connected with the input end of the resistor R7, the output end of the resistor R7 is electrically connected with the input end of a load RL7, the output end of the load RL7 is electrically connected with the negative output end of the voltage input circuit 1, and the control end of the relay KM1 is electrically connected with the 6 pin of the control chip U1.
As a further aspect of the present invention: the positive input end of the electric storage circuit 6 is electrically connected with the positive output end of the voltage input circuit 1, and the negative end of the electric storage circuit 6 is electrically connected with the negative output end of the voltage input circuit 1; the second switch circuit 5 comprises a breaker QF2 and a relay KM2, wherein the input end of the breaker QF2 is electrically connected with the positive electrode of the electric storage circuit 6, the output end of the breaker QF2 is electrically connected with the input end of the relay KM2, the output end of the relay KM2 is electrically connected with the input end of a load RL7, and the output end of the load RL7 is electrically connected with the negative electrode of the electric storage circuit 6.
The small household appliance control circuit board with the multiple interlocking protection function is characterized in that a voltage input circuit 1 is connected with commercial power to process the input power, the input commercial power is rectified and filtered to supply power to a load RL7, the load RL7 can be various small household appliances, a voltage detection circuit 2 is connected with the output end of the voltage input circuit 1, when the power is normally supplied, the power flows through a resistor R1 to enable a triode Q1 to be in saturated conduction, the triode Q1 is in saturated conduction, the input voltage is divided through resistors R4 and R5, the divided electric signal passes through a resistor R6 to supply a conduction signal to a control chip U1, the control chip U1 detects the conduction state of the triode Q1 in real time, when the triode Q1 is in normal power supply, the control chip U1 obtains a normal power supply signal and controls a relay KM1 to be closed, a control relay KM2 to be disconnected, at the moment, the load RL7 is directly connected to the voltage input, the power supply device is used for supplying power for normal work of a load RL7, when power failure or voltage abnormality occurs, the triode Q1 is in a non-conduction state at the moment, the control chip U1 cannot receive a transmitted voltage signal, the control chip U1 controls the relay KM1 to be disconnected at the moment, an unstable power supply stops being adopted to supply power for the load RL7, work of the load RL7 is protected, meanwhile, the relay KM2 is controlled to be conducted, the power storage circuit 6 is adopted to supply power for the load RL7, so that the load RL7 works normally, when the triode Q1 is conducted, the relay KM2 is controlled to be disconnected, the relay KM1 is controlled to be closed, and commercial power is normally adopted.
In summary, the following steps: the small household appliance control circuit board with the multiple interlocking protection function is characterized in that a voltage detection circuit 2 detects the power supply state of a power supply, when the power supply is normal, a triode Q1 is in saturated conduction, a conduction signal is sent to a control chip U1, the control chip U1 controls a relay KM1 to be closed after obtaining the signal, a control relay KM2 is disconnected, a load RL7 is directly connected to a voltage input circuit 1 to be supplied with power through commercial power, when the power supply is interrupted or the voltage is abnormal, the triode Q1 is in a non-conduction state, the control chip U1 controls a relay KM1 to be disconnected after obtaining the signal, a power storage circuit 6 is adopted to supply power to the load RL7, so that the load RL7 works normally, when the voltage is normal, the control relay KM2 is disconnected, the control relay KM1 is closed, the commercial power supply is normally adopted, the voltage detection circuit 2 is adopted to detect the voltage state, and the voltage detection, the load RL7 can be protected by providing a stable power supply for the load RL 7.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a little household electrical appliances control circuit board with multiple interlocking protect function, includes voltage input circuit (1), voltage detection circuit (2), the control unit microprocessor (3), first switch circuit (4), second switch circuit (5), electric power storage circuit (6) and load RL (7), its characterized in that: the input end of the voltage input circuit (1) is connected with mains supply input, the input end of the voltage detection circuit (2) is electrically connected with the output end of the voltage input circuit (1), and the output end of the voltage input circuit (1) is electrically connected with the input end of the control unit microprocessor (3); the input end of the first switch circuit (4) is electrically connected with the output end of the voltage input circuit (1), the output end of the first switch circuit (4) is electrically connected with the load RL (7), the input end of the electric storage circuit (6) is electrically connected with the output end of the voltage input circuit (1), the output end of the electric storage circuit (6) is electrically connected with the input end of the second switch circuit (5), and the output end of the second switch circuit (5) is electrically connected with the load RL (7); the first switch circuit (4) and the second switch circuit (5) are electrically connected with the output end of the control unit microprocessor (3).
2. The small household electrical appliance control circuit board with multiple interlocking protection functions as claimed in claim 1, characterized in that: the voltage detection circuit (2) comprises a resistor R1-a resistor R6, a triode Q1 and a capacitor C1, wherein the input end of the resistor R1 is connected with the positive electrode output end of the voltage input circuit (1), the output end of the resistor R1 is electrically connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected to the output end of the resistor R3 and the input end of the resistor R4, and the input end of the resistor R3 is connected to the negative electrode output end of the voltage input circuit (1); the output end of the resistor R4 is connected to the input end of the resistor R6, connected to the input end of the resistor R5 and connected to the emitter of the triode Q1, and the emitter of the triode Q1 is connected to the negative output end of the voltage input circuit (1); the output terminal of the resistor R6 is connected to the input terminal of the capacitor C1 and to the input terminal of the control unit microprocessor (3), and the output terminal of the capacitor C1 is grounded.
3. The small household electrical appliance control circuit board with multiple interlocking protection functions as claimed in claim 1, characterized in that: the control unit microprocessor (3) adopts a control chip U1, the model of the control chip U1 is STM32F, and a pin 32 of the control chip U1 is electrically connected with the output end of the resistor R6.
4. The small household electrical appliance control circuit board with multiple interlocking protection functions as claimed in claim 1, characterized in that: the first switch circuit (4) comprises a breaker QF1, a resistor R7 and a relay KM1, wherein the input end of the breaker QF1 is electrically connected with the positive electrode output end of the voltage input circuit (1), the output end of the breaker QF1 is electrically connected with the input end of the relay KM1, the output end of the relay KM1 is electrically connected with the input end of the resistor R7, the output end of the resistor R7 is electrically connected with the input end of a load RL (7), the output end of the load RL (7) is electrically connected with the negative electrode output end of the voltage input circuit (1), and the control end of the relay KM1 is electrically connected with a pin 6 of a control chip U1.
5. The small household electrical appliance control circuit board with multiple interlocking protection functions as claimed in claim 1, characterized in that: the positive electrode input end of the electric storage circuit (6) is electrically connected with the positive electrode output end of the voltage input circuit (1), and the negative electrode of the electric storage circuit (6) is electrically connected with the negative electrode output end of the voltage input circuit (1); the second switch circuit (5) comprises a breaker QF2 and a relay KM2, wherein the input end of the breaker QF2 is electrically connected with the positive electrode of the electric storage circuit (6), the output end of the breaker QF2 is electrically connected with the input end of the relay KM2, the output end of the relay KM2 is electrically connected with the input end of a load RL (7), and the output end of the load RL (7) is electrically connected with the negative electrode of the electric storage circuit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023145918.5U CN213637197U (en) | 2020-12-23 | 2020-12-23 | Small household appliance control circuit board with multiple interlocking protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023145918.5U CN213637197U (en) | 2020-12-23 | 2020-12-23 | Small household appliance control circuit board with multiple interlocking protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213637197U true CN213637197U (en) | 2021-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023145918.5U Active CN213637197U (en) | 2020-12-23 | 2020-12-23 | Small household appliance control circuit board with multiple interlocking protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213637197U (en) |
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2020
- 2020-12-23 CN CN202023145918.5U patent/CN213637197U/en active Active
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