CN219512528U - Control circuit and electrical equipment - Google Patents
Control circuit and electrical equipment Download PDFInfo
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- CN219512528U CN219512528U CN202223613664.4U CN202223613664U CN219512528U CN 219512528 U CN219512528 U CN 219512528U CN 202223613664 U CN202223613664 U CN 202223613664U CN 219512528 U CN219512528 U CN 219512528U
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Abstract
The utility model discloses a control circuit and an electrical device, wherein the control circuit comprises: the power supply unit, connect in the controller of power supply unit, control circuit is including connecting in the multiple peripheral hardware circuit of power supply unit, and multiple peripheral hardware circuit parallel connection just connects in the controller through unusual detection circuit, and the controller stores the protection parameter corresponding with multiple peripheral hardware circuit, if the controller detects peripheral hardware circuit abnormality through unusual detection circuit, the unusual warning of controller control. The plurality of peripheral circuits are connected with the controller through the abnormality detection circuit, so that ports can be saved, abnormality detection can be carried out on the peripheral circuits, and the safety of the circuits can be improved.
Description
[ field of technology ]
The present utility model relates to an electrical device, and more particularly to a control circuit for an electrical device.
[ background Art ]
With the increasing demands of users, the protection functions of the electrical devices are increasing, so that the more detection circuits are attached to the controller, the more the controller usually detects an abnormal function of the device through one I/O port, so that a plurality of I/O ports of the controller are required to detect, which may cause a problem that the I/O ports are not used enough.
Please refer to the chinese patent No. CN209046313U issued 28 in 2019, it discloses that the charger circuit includes a driving voltage VCC, a control chip, an indicator lamp operating circuit, a radiator fan operating circuit, and a voltage detecting circuit, wherein the 1 st pin of the control chip is connected with the driving voltage VCC, the indicator lamp operating circuit and the radiator fan operating circuit are connected in parallel between the 2 nd pin of the control chip and the driving voltage VCC, but the abnormality of the parallel indicator lamp operating circuit and radiator fan operating circuit is not detected, and the safety performance is poor.
Therefore, there is a need to design a control circuit and an electrical device with high safety, which saves ports, so as to solve the above problems.
[ utility model ]
In order to solve the above problems, the present utility model provides a control circuit and an electrical device with high safety, which can save ports.
The utility model solves the problems in the prior art by adopting the following technical scheme: a control circuit, comprising: the power supply unit is connected to the controller of the power supply unit, the power supply unit is connected to the first port of the controller, the control circuit comprises a plurality of peripheral circuits connected to the power supply unit, the peripheral circuits are connected in parallel and connected to the controller through an abnormality detection circuit, the abnormality detection circuit comprises an abnormality detection end, the abnormality detection circuit is connected to the output ends of the peripheral circuits and the abnormality detection end is connected to the controller, the controller stores protection parameters corresponding to the peripheral circuits, and if the controller detects abnormality of the peripheral circuits through the abnormality detection circuit, the controller controls abnormality reminding.
The further improvement scheme is as follows: the abnormality detection circuit further comprises a resistor, one end of the resistor is connected with the output ends of the plurality of peripheral circuits, the resistor is connected with the second port of the controller through the abnormality detection end, and the other end of the resistor is grounded.
The further improvement scheme is as follows: the protection parameter is the product of the resistor and the sum of the currents flowing through the peripheral circuits, the controller detects the voltage of the resistor through the abnormality detection end and compares the voltage with the protection parameter, and if the voltage of the abnormality detection end is smaller than the protection parameter, the controller judges that the peripheral circuits are abnormal.
The further improvement scheme is as follows: the controller outputs control signals to the plurality of peripheral circuits to control the current, and the protection parameters correspond to different control signals.
The further improvement scheme is as follows: the plurality of peripheral circuits comprise a first peripheral fan circuit and a second peripheral fan circuit, the first peripheral fan circuit comprises a first fan and a first switch tube, one end of the first fan is connected with the power supply unit, the other end of the first fan is connected with a collector electrode of the first switch tube, a base electrode of the first switch tube is connected with the controller, and an emitter electrode of the first switch tube is connected with the abnormality detection circuit; the second external fan circuit comprises a second fan and a second switch tube, one end of the second fan is connected with the power supply unit, the other end of the second fan is connected with the collector of the second switch tube, the base of the second switch tube is connected with the controller, and the emitter of the second switch tube is connected with the emitter of the first switch tube and the abnormality detection circuit.
The further improvement scheme is as follows: the control signal is the duty ratio of the base electrode input to the first switching tube and the second switching tube.
The further improvement scheme is as follows: the external circuits comprise at least one external fan circuit and at least one indicator light circuit, the external fan circuit comprises a fan and a switch tube, one end of the fan is connected with the power supply unit, the other end of the fan is connected with a collector electrode of the switch tube, a base electrode of the switch tube is connected with the controller, and an emitter electrode of the switch tube is connected with the abnormality detection circuit; the indicator light circuit comprises an indicator light and a switch tube, wherein the anode of the indicator light is connected with the power supply unit, the cathode of the indicator light is connected with the collector of the switch tube, the base of the switch tube is connected with the controller, and the emitter of the switch tube is connected with the abnormality detection circuit.
The further improvement scheme is as follows: the protection parameter is the product of the resistance and the sum of currents flowing through the at least one peripheral fan circuit and the at least one indicator light circuit.
The further improvement scheme is as follows: the control circuit further comprises an abnormality indication circuit, the abnormality indication circuit is connected with the third port of the controller, and the abnormality indication circuit comprises an abnormality indication lamp.
The utility model solves the problems in the prior art and can also adopt the following technical scheme: an electrical device, comprising: the power supply unit is connected to the controller of the power supply unit, the power supply unit is connected to the first port of the controller, the control circuit comprises a plurality of peripheral circuits connected to the power supply unit, the peripheral circuits are connected in parallel and connected to the controller through an abnormality detection circuit, the controller stores protection parameters corresponding to the peripheral circuits, and if the controller detects abnormality of the peripheral circuits through the abnormality detection circuit, the controller controls abnormality reminding.
Compared with the prior art, the utility model has the following beneficial effects: the control circuit is provided with a plurality of peripheral circuits connected to the power supply unit, the peripheral circuits are connected in parallel and connected to the controller through the abnormality detection circuit, the controller stores protection parameters corresponding to the peripheral circuits, if the controller detects abnormality of the peripheral circuits through the abnormality detection circuit, the controller controls abnormality reminding, so that ports can be saved, abnormality detection can be carried out on the peripheral circuits, and the safety of the circuits can be improved.
[ description of the drawings ]
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:
FIG. 1 is a perspective view of an electrical device of the present utility model;
FIG. 2 is a schematic diagram of a control circuit of a first embodiment of the present utility model;
fig. 3 is a schematic diagram of a control circuit according to a second embodiment of the present utility model.
Meaning of reference numerals in the drawings:
100. charger 101, case 102, indicator lamp 1, power supply unit 2, controller 3, abnormality detection circuit 4, first peripheral fan circuit 41, first fan 5, second peripheral fan circuit 51, second fan 6, abnormality indication circuit 7, first indicator lamp circuit 8, second indicator lamp circuit
[ detailed description ] of the utility model
The utility model will be described in further detail with reference to the drawings and embodiments.
Referring to fig. 1 and 2, an electrical device according to the present utility model is shown, and in this embodiment, the electrical device is a charger 100, and may be a power tool such as an electric drill, a mower, or an electric saw. The charger 100 comprises a housing 101, a circuit board installed in the housing 101, and a fan for cooling the circuit board of the charger 100 and a battery pack (not shown) inserted in the charger 100; an indicator lamp 102 is mounted on the housing 101 for displaying the charging state of the charger 100.
The control circuit of the charger 100 includes: the power supply unit 1, connect in the controller 2 of power supply unit 1, power supply unit 1 connects the first port of controller 2, control circuit include connect in power supply unit 1's a plurality of peripheral circuits, a plurality of peripheral circuits connect in parallel, and connect in through anomaly detection circuit 3 in controller 2, controller 2 storage with the corresponding protection parameter of a plurality of peripheral circuits, if controller 2 passes through anomaly detection circuit 3 detects the peripheral circuit is unusual, controller 2 control is unusual to be reminded.
Referring to fig. 2, a control circuit diagram of a first embodiment of the present utility model is shown, wherein the power supply unit 1 includes an ac power source and a voltage reduction module connected to the ac power source to reduce the ac power to a voltage capable of driving the controller 2, for example, 5V. The abnormality detection circuit 3 comprises a resistor R1 and an abnormality detection end a, one end of the resistor R1 is connected with the output ends of the plurality of peripheral circuits, the abnormality detection end a is connected with the second port of the controller 2, and the other end of the resistor R1 is grounded. The plurality of peripheral circuits comprise a first peripheral fan circuit 4 and a second peripheral fan circuit 5, the first peripheral fan circuit 4 comprises a first fan 41 and a first switch tube Q1, one end of the first fan 41 is connected with the power supply unit 1 through a resistor and a diode, if the power supply unit 1 provides 12V, the other end of the first fan 41 is connected with a collector electrode of the first switch tube Q1, a base electrode of the first switch tube Q1 is connected with the controller 2, and an emitter electrode of the first switch is connected with the abnormality detection circuit 3; the second external fan circuit 5 includes a second fan 51 and a second switching tube Q2, one end of the second fan 51 is connected with the power supply unit 1 through a resistor and a diode, the other end of the second fan 51 is connected with a collector of the second switching tube Q2, a base of the second switching tube Q2 is connected with the controller 2, and an emitter of the second switching tube Q2 is connected with an emitter of the first switching tube Q1 and the abnormality detection circuit 3. The control circuit further comprises an abnormality indication circuit 6, the abnormality indication circuit 6 is connected with the third port of the controller 2, and the abnormality indication circuit 6 comprises an abnormality indication lamp LED1. The protection parameter is the product of the resistor R1 and the sum of the currents flowing through the peripheral circuits, the controller 2 detects the voltage of the resistor R1 through the abnormality detection terminal a and compares the voltage with the protection parameter, and if the voltage of the abnormality detection terminal a is smaller than the protection parameter, the controller determines that the peripheral circuits are abnormal.
In this embodiment, when the charger 100 starts to charge, the charger 100 outputs a control signal to the bases of the first switching tube Q1 and the second switching tube Q2, the control signal is a duty ratio, the protection parameter corresponds to different control signals, the first peripheral fan circuit 4 and the second peripheral fan circuit 5 operate simultaneously, and the first fan 41 and the second fan 51 operate simultaneously to dissipate heat from the battery pack and the circuit board. The nominal current of the first peripheral fan circuit 4 and the second peripheral fan circuit 5 is 150mA, if the duty ratio signal is 100%, that is, the protection parameter is the product of the sum of the nominal currents of the first peripheral fan circuit 4 and the second peripheral fan circuit 5 and the resistor R1, if the resistor R1 of the resistor R1 is 10 Ω, the protection parameter is 3V, if the voltage of the abnormality detection terminal a is less than the protection parameter during operation, the abnormality of the peripheral circuit is determined, and the abnormal indicator LED1 is controlled to light or flash. Of course, the control signal may be less than 100% to adjust the wind speed of the first fan 41 and the second fan 51, at this time, the currents of the first peripheral fan circuit 4 and the second peripheral fan circuit 5 are changed according to the control signal, and the protection parameter corresponds to different control signals.
Referring to fig. 3, a control circuit diagram according to a second embodiment of the present utility model is shown, and the difference from the first embodiment is that: the plurality of peripheral circuits include at least one peripheral fan circuit and at least one indicator light circuit, the indicator light circuit indicates that the charger 100 is full or not full, in this embodiment, the plurality of peripheral circuits include a first peripheral fan circuit 4, a second peripheral fan circuit 5, a first indicator light circuit 7 and a second indicator light circuit 8, the first peripheral fan circuit 4 includes a first fan 41 and a first switch tube Q1, one end of the first fan 41 is connected with the power supply unit 1, the other end of the first fan 41 is connected with a collector of the first switch tube Q1, a base of the first switch tube Q1 is connected with the controller 2, and an emitter of the first switch tube Q1 is connected with the abnormality detection circuit 3; the second external fan circuit 5 includes a second fan 51 and a second switching tube Q2, one end of the second fan 51 is connected to the power supply unit 1, the other end of the second fan 51 is connected to a collector of the second switching tube Q2, a base of the second switching tube Q2 is connected to the controller 2, and an emitter of the second switching tube Q2 is connected to the abnormality detection circuit 3; the first indicator light circuit 7 comprises a red indicator light LED2 and a third switch tube Q3, wherein an anode of the red indicator light LED2 is connected with the power supply unit 1, a cathode of the red indicator light LED2 is connected with a collector of the third switch tube Q3, a base of the third switch tube Q3 is connected with the controller 2, and an emitter of the third switch tube Q3 is connected with the abnormality detection circuit 3; the second indicator light circuit 8 comprises a green indicator light LED3 and a fourth switch tube Q4, the anode of the green indicator light LED3 is connected with the power supply unit 1, the cathode of the green indicator light LED3 is connected with the collector of the fourth switch tube Q4, the base of the fourth switch tube Q4 is connected with the controller 2, the emitter of the fourth switch tube Q4 is connected with the abnormality detection circuit 3, and meanwhile, the emitters of the first, second, third and fourth switch tubes Q1-Q4 are connected. The protection parameter is the product of the resistance R1 and the sum of currents flowing through at least one peripheral fan circuit and at least one indicator light circuit.
In this embodiment, when the charger 100 starts to charge, the controller 2 outputs control signals to the bases of the first switch Q1, the second switch Q2 and the third switch Q3, respectively, the controller 2 controls the first peripheral fan circuit 4, the second peripheral fan circuit 5 and the first indicator light circuit 7 to operate simultaneously, and the first fan 41 and the second fan 51 operate simultaneously to radiate heat from the battery pack and the circuit board, and the charging is indicated by the red indicator light LED 2. The nominal current of the first peripheral fan circuit 4 and the second peripheral fan circuit 5 is 150mA, the nominal current of the first indicator light circuit 7 and the second indicator light circuit 8 is 20mA, if the duty ratio signal is 100%, that is, the protection parameter is the product of the sum of the nominal currents of the first peripheral fan circuit 4, the second peripheral fan circuit 5 and the first indicator light circuit 7 and the resistor R1, if the resistor R1 value of the resistor R1 is 10Ω, the protection parameter is 3.2V, if the voltage of the abnormality detection end a is smaller than the protection parameter during operation, the peripheral circuit is judged to be abnormal, and the abnormal indicator light LED1 is controlled to light or flash.
When the battery pack is fully charged, the controller 2 outputs control signals to the base electrodes of the first switching tube Q1, the second switching tube Q2 and the fourth switching tube Q4 respectively, the controller 2 controls the first peripheral fan circuit 4, the second peripheral fan circuit 5 and the second indicator light circuit 8 to work simultaneously, the first fan 41 and the second fan 51 work simultaneously to radiate heat of the battery pack and the circuit board, and the charging is finished through the indication of the green indicator light LED3, and the protection parameter is 3.2V. Of course, the control signal may be less than 100% to adjust the wind speed of the first fan 41 and the second fan 51, at this time, the currents of the first peripheral fan circuit 4 and the second peripheral fan circuit 5 are changed according to the control signal, and the protection parameter corresponds to different control signals.
The control circuit of the utility model is provided with a plurality of peripheral circuits connected to the power supply unit 1, the peripheral circuits are connected in parallel and connected to the controller 2 through the abnormality detection circuit 3, the controller 2 stores protection parameters corresponding to the peripheral circuits, if the controller 2 detects abnormality of the peripheral circuits through the abnormality detection circuit 3, the controller 2 controls abnormality reminding, so that ports can be saved, abnormality detection can be performed on the peripheral circuits, and the safety of the circuit can be improved.
The present utility model is not limited to the above-described embodiments. Those of ordinary skill in the art will readily appreciate that many other alternatives to the control circuitry and electrical devices of the present utility model are possible without departing from the spirit and scope of the present utility model. The protection scope of the present utility model is subject to the claims.
Claims (10)
1. A control circuit, comprising: the power supply unit is connected with a first port of the controller; the method is characterized in that: the control circuit comprises a plurality of peripheral circuits connected to the power supply unit, the peripheral circuits are connected in parallel and connected to the controller through an abnormality detection circuit, the abnormality detection circuit comprises an abnormality detection end, the abnormality detection circuit is connected with the output ends of the peripheral circuits and the abnormality detection end is connected with the controller, the controller stores protection parameters corresponding to the peripheral circuits, and if the controller detects abnormality of the peripheral circuits through the abnormality detection circuit, the controller controls abnormality reminding.
2. The control circuit of claim 1, wherein: the abnormality detection circuit further comprises a resistor, one end of the resistor is connected with the output ends of the plurality of peripheral circuits, the resistor is connected with the second port of the controller through the abnormality detection end, and the other end of the resistor is grounded.
3. The control circuit of claim 2, wherein: the protection parameter is the product of the resistor and the sum of the currents flowing through the peripheral circuits, the controller detects the voltage of the resistor through the abnormality detection end and compares the voltage with the protection parameter, and if the voltage of the abnormality detection end is smaller than the protection parameter, the controller judges that the peripheral circuits are abnormal.
4. A control circuit according to claim 3, wherein: the controller outputs control signals to the plurality of peripheral circuits to control the current, and the protection parameters correspond to different control signals.
5. The control circuit of claim 4, wherein: the plurality of peripheral circuits comprise a first peripheral fan circuit and a second peripheral fan circuit, the first peripheral fan circuit comprises a first fan and a first switch tube, one end of the first fan is connected with the power supply unit, the other end of the first fan is connected with a collector electrode of the first switch tube, a base electrode of the first switch tube is connected with the controller, and an emitter electrode of the first switch tube is connected with the abnormality detection circuit; the second external fan circuit comprises a second fan and a second switch tube, one end of the second fan is connected with the power supply unit, the other end of the second fan is connected with the collector of the second switch tube, the base of the second switch tube is connected with the controller, and the emitter of the second switch tube is connected with the emitter of the first switch tube and the abnormality detection circuit.
6. The control circuit of claim 5, wherein: the control signal is the duty ratio of the base electrode input to the first switching tube and the second switching tube.
7. The control circuit of claim 4, wherein: the external circuits comprise at least one external fan circuit and at least one indicator light circuit, the external fan circuit comprises a fan and a switch tube, one end of the fan is connected with the power supply unit, the other end of the fan is connected with a collector electrode of the switch tube, a base electrode of the switch tube is connected with the controller, and an emitter electrode of the switch tube is connected with the abnormality detection circuit; the indicator light circuit comprises an indicator light and a switch tube, wherein the anode of the indicator light is connected with the power supply unit, the cathode of the indicator light is connected with the collector of the switch tube, the base of the switch tube is connected with the controller, and the emitter of the switch tube is connected with the abnormality detection circuit.
8. The control circuit of claim 7, wherein: the protection parameter is the product of the resistance and the sum of currents flowing through the at least one peripheral fan circuit and the at least one indicator light circuit.
9. The control circuit of claim 1, wherein: the control circuit further comprises an abnormality indication circuit, the abnormality indication circuit is connected with the third port of the controller, and the abnormality indication circuit comprises an abnormality indication lamp.
10. An electrical device, comprising: the power supply unit is connected with a first port of the controller; the method is characterized in that: the control circuit comprises a plurality of peripheral circuits connected to the power supply unit, the peripheral circuits are connected in parallel and connected to the controller through an abnormality detection circuit, the abnormality detection circuit comprises an abnormality detection end, the abnormality detection circuit is connected with the output ends of the peripheral circuits and the abnormality detection end is connected with the controller, the controller stores protection parameters corresponding to the peripheral circuits, and if the controller detects abnormality of the peripheral circuits through the abnormality detection circuit, the controller controls abnormality reminding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223613664.4U CN219512528U (en) | 2022-12-29 | 2022-12-29 | Control circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223613664.4U CN219512528U (en) | 2022-12-29 | 2022-12-29 | Control circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219512528U true CN219512528U (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223613664.4U Active CN219512528U (en) | 2022-12-29 | 2022-12-29 | Control circuit and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219512528U (en) |
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2022
- 2022-12-29 CN CN202223613664.4U patent/CN219512528U/en active Active
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