CN206148921U - Power source detection circuit and electronic product - Google Patents
Power source detection circuit and electronic product Download PDFInfo
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- CN206148921U CN206148921U CN201621251092.1U CN201621251092U CN206148921U CN 206148921 U CN206148921 U CN 206148921U CN 201621251092 U CN201621251092 U CN 201621251092U CN 206148921 U CN206148921 U CN 206148921U
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Abstract
The utility model discloses a power source detection circuit and electronic product, power source detection circuit include power end, a detection circuitry, the 2nd detection circuitry, the 3rd detection circuitry, control circuit, and the power end includes live wire, zero line, ground wire, a detection circuitry includes first protection circuit and first opto -coupler circuit, and control circuit is according to the break -make of input signal control live wire, zero line and the ground wire of first opto -coupler circuit, the 2nd detection circuitry includes second protection circuit and second opto -coupler circuit, and control circuit is according to the break -make of input signal control live wire, zero line and the ground wire of second opto -coupler circuit, the 3rd detection circuitry includes third protection circuit and third opto -coupler circuit, and control circuit is according to the break -make of input signal control live wire, zero line and the ground wire of third opto -coupler circuit. The utility model discloses a power source detection circuit and electronic product according to the break -make of the input signal control live wire of opto -coupler circuit, zero line, ground wire, eliminates electric leakage hidden danger, improves electrical safety nature, guarantees electrical safety.
Description
Technical field
This utility model belongs to field of circuit technology, is to be related to a kind of power sense circuit and adopt institute specifically
State the electronic product of power sense circuit design.
Background technology
According to the developing direction of kitchen appliance now, dependence of the kitchen appliance product to electricity usage can be increasingly severe, protection against electric shock skill
Art seems more and more important, and at present country's protection against electric shock is mostly or using tradition sides such as insulation, screen shield, a square, ground connection and connecting to neutral
Method, these traditional methods all be present, wherein what is projected the most is the problem of ground connection and connecting to neutral.
The ground connection of electrical equipment and connecting to neutral are the basic security measures for preventing mediate contact from shocking by electricity.In real work, very
Many electricians are unclear with the preventing principle of connecting to neutral, the scope of application, technical requirements and the difference of the two understanding for ground connection, or even one
A little professional and technical personnel are unclear for these problems also recognize.Therefore, the production of many units and household electricity place ground connection and
The present situation of connecting to neutral is incomplete.Modal problem is, should the position of connecting to neutral mistakenly take grounding measures；Mistakenly
Use working zero line as protection zero line, or act on protection zero line as working zero line；And protection zero line is without enough
Area etc..The presence of these problems causes electrical equipment to have very big electric leakage risk, seriously threatens the safety of user.
The content of the invention
This utility model provides a kind of power sense circuit, improves electrical safety.
To solve above-mentioned technical problem, this utility model is employed the following technical solutions and is achieved：
A kind of power sense circuit, including power end, the first detection circuit, the second detection circuit, three testing circuit, control
Circuit processed, the power end includes live wire, zero line, ground wire；The first detection circuit includes the first protection circuit and the first light
Coupling circuit；Live wire connects the first input end of the first photoelectric coupled circuit by the first protection circuit, and the second of the first photoelectric coupled circuit is defeated
Enter end connection zero line, the outfan connection control circuit of the first photoelectric coupled circuit, output of the control circuit according to the first photoelectric coupled circuit
The break-make of signal control live wire, zero line and ground wire；The second detection circuit includes the second protection circuit and the second photoelectric coupled circuit；
Live wire connects the first input end of the second photoelectric coupled circuit, the second input connection of the second photoelectric coupled circuit by the second protection circuit
Ground wire, the outfan connection control circuit of the second photoelectric coupled circuit, control circuit is controlled according to the output signal of the second photoelectric coupled circuit
The break-make of live wire, zero line and ground wire；The three testing circuit includes the 3rd protection circuit and the 3rd photoelectric coupled circuit；Zero line passes through
3rd protection circuit connects the first input end of the 3rd photoelectric coupled circuit, and the second input of the 3rd photoelectric coupled circuit connects ground wire, the
Three photoelectric coupled circuits outfan connection control circuit, control circuit according to the output signal of the 3rd photoelectric coupled circuit control live wire, zero
The break-make of line and ground wire.
Further, the power sense circuit also includes the 4th detection circuit；The 4th detection circuit includes detection
Point, the 4th protection circuit and the 4th photoelectric coupled circuit；Ground wire connects the first input of the 4th photoelectric coupled circuit by the 4th protection circuit
End, the second input connecting detection point of the 4th photoelectric coupled circuit, the outfan connection control circuit of the 4th photoelectric coupled circuit.
Further, first protection circuit includes first resistor and second resistance, one end of the first resistor
Connection live wire, the other end of the first resistor connects one end of second resistance, and the other end of the second resistance connects zero line,
The intermediate node of the first resistor and second resistance connects the first input end of the first photoelectric coupled circuit.
Further, second protection circuit includes 3rd resistor and the 4th resistance, one end of the 3rd resistor
Connection live wire, the other end of the 3rd resistor connects one end of the 4th resistance, and the other end of the 4th resistance connects ground wire,
The intermediate node of the 3rd resistor and the 4th resistance connects the first input end of the second photoelectric coupled circuit.
Further, the 3rd protection circuit includes the 5th resistance and the 6th resistance, one end of the 5th resistance
Connection zero line, the other end of the 5th resistance connects one end of the 6th resistance, and the other end of the 6th resistance connects ground wire,
The intermediate node of the 5th resistance and the 6th resistance connects the first input end of the 3rd photoelectric coupled circuit.
Preferably, the 4th protection circuit includes the 7th resistance and the 8th resistance, one end connection of the 7th resistance
Ground wire, the other end of the 7th resistance connects one end of the 8th resistance, the other end connecting detection point of the 8th resistance, institute
State the first input end of intermediate node the 4th photoelectric coupled circuit of connection of the 7th resistance and the 8th resistance.
Further, the 4th detection circuit also includes light emitting diode, the anode connection the of the light emitting diode
The intermediate node of seven resistance and the 8th resistance, negative electrode connects the first input end of the 4th photoelectric coupled circuit.
Further, the 4th detection circuit also includes duplex microswitch, and the duplex microswitch includes the
One movable contact, the first normally closed stationary contact, the first normally opened stationary contact, the second movable contact, the second normally closed stationary contact, the second normally opened stationary contact
Point；First movable contact connects ground wire, the first normally closed stationary contact connect respectively the second photoelectric coupled circuit the second input,
Second input of the 3rd photoelectric coupled circuit, the first normally opened stationary contact connects the 4th protection circuit；Second movable contact connects
Ground, the second normally closed stationary contact is hanging, the second normally opened stationary contact by pull-up resistor connection DC source, and second normal
Open the detection pin that stationary contact connects control circuit.
Further, the power sense circuit also includes display screen, and the control circuit control display screen is shown
Show.
Based on the structure design of above-mentioned power sense circuit, this utility model also proposed a kind of using the power detecting
The electronic product of circuit design, the power sense circuit include power end, first detection circuit, second detection circuit, the 3rd
Detection circuit, control circuit, the power end includes live wire, zero line, ground wire；The first detection circuit includes the first protection electricity
Road and the first photoelectric coupled circuit；Live wire connects the first input end of the first photoelectric coupled circuit, the first optocoupler electricity by the first protection circuit
The second input connection zero line on road, the outfan connection control circuit of the first photoelectric coupled circuit, control circuit is according to the first optocoupler
The break-make of the output signal control live wire, zero line and ground wire of circuit；The second detection circuit includes the second protection circuit and the
Two photoelectric coupled circuits；Live wire connects the first input end of the second photoelectric coupled circuit by the second protection circuit, and the of the second photoelectric coupled circuit
Two inputs connect ground wire, and the outfan of the second photoelectric coupled circuit connects control circuit, and control circuit is according to the second photoelectric coupled circuit
The break-make of output signal control live wire, zero line and ground wire；The three testing circuit includes the 3rd protection circuit and the 3rd optocoupler
Circuit；Zero line connects the first input end of the 3rd photoelectric coupled circuit, the second input of the 3rd photoelectric coupled circuit by the 3rd protection circuit
End connection ground wire, the outfan connection control circuit of the 3rd photoelectric coupled circuit, control circuit is believed according to the output of the 3rd photoelectric coupled circuit
Number control live wire, the break-make of zero line and ground wire.
Compared with prior art, advantage of the present utility model and good effect are：Power sense circuit of the present utility model
And electronic product, the break-make of live wire, zero line, ground wire is controlled according to the output signal of photoelectric coupled circuit, electric leakage hidden danger is eliminated, improve and use
Electric safety, it is ensured that Electrical Safety.
After the detailed description of this utility model embodiment is read in conjunction with the accompanying, other features of the present utility model and advantage
Will become clearer from.
Description of the drawings
Fig. 1 is a kind of theory diagram of embodiment of the power sense circuit that this utility model is proposed；
Fig. 2 is a kind of circuit theory diagrams of embodiment of the power sense circuit that this utility model is proposed.
Specific embodiment
Specific embodiment of the present utility model is described in more detail below in conjunction with the accompanying drawings.
The power sense circuit of the present embodiment mainly include power end P1, first detection circuit, second detection circuit, the 3rd
Detection circuit, control circuit U5, power end P1 includes live wire L, zero line N, ground wire E, power end P1 grafting sockets, the outside confession of connection
Power supply, referring to shown in Fig. 1, Fig. 2.
First detection circuit mainly includes the first protection circuit and the first photoelectric coupled circuit U1；Live wire L is by the first protection electricity
Road connects the first input end of the first photoelectric coupled circuit U1, the second input connection zero line N of the first photoelectric coupled circuit U1, the first optocoupler
The outfan of circuit U 1 connects the detection pin T1 of control circuit, output signal control of the control circuit according to the first photoelectric coupled circuit U1
The break-make of hold line L, zero line N and ground wire E.
When having electric current between live wire L and zero line N, electric current is transmitted to the first photoelectric coupled circuit U1 by the first protection circuit,
First photoelectric coupled circuit U1 is turned on, and control circuit receives the Continuity signal that the first photoelectric coupled circuit U1 sends, illustrate live wire and zero line it
Between have electricity, power end is powered normally；When there is no electric current between live wire and zero line, the shut-off of the first photoelectric coupled circuit U1, control circuit
The cut-off signals of the first photoelectric coupled circuit U1 transmission are received, illustrates do not have electricity between live wire and zero line, power end abnormal electrical power supply, control electricity
Road cut-out live wire, zero line and ground wire, to eliminate abnormal electrical power supply caused by leak electricity hidden danger, improve electrical safety, it is ensured that electricity consumption is pacified
Entirely.
First photoelectric coupled circuit U1 has two outfans, and one of outfan connects DC source by pull-up resistor R1
（5V）, and the detection pin T1, another output head grounding GND of control circuit are connected by current-limiting resistance R7.When the first optocoupler
When circuit U 1 is turned on, to the detection pin T1 of control circuit low level Continuity signal is sent；When the shut-off of the first photoelectric coupled circuit U1
When, send the cut-off signals of high level to the detection pin T1 of control circuit.
In the present embodiment, the first protection circuit plays a part of current-limiting protection, mainly includes first resistor R4 and second
Resistance R10, one end connection live wire L of first resistor R4, the other end of first resistor R4 connects one end of second resistance R10, the
The intermediate node of the other end connection zero line N of two resistance R10, first resistor R4 and second resistance R10 connects the first photoelectric coupled circuit
The first input end of U1.
Second detection circuit mainly includes the second protection circuit and the second photoelectric coupled circuit U2；Live wire L is by the second protection electricity
Road connects the first input end of the second photoelectric coupled circuit U2, the second input connection ground wire E of the second photoelectric coupled circuit U2, the second optocoupler
The outfan of circuit U 2 connects the detection pin T2 of control circuit, output signal control of the control circuit according to the second photoelectric coupled circuit U2
The break-make of hold line L, zero line N and ground wire E.
When having electric current between live wire L and ground wire E, electric current is transmitted to the second photoelectric coupled circuit U2 by the second protection circuit,
Second photoelectric coupled circuit U2 is turned on, and control circuit receives the Continuity signal that the second photoelectric coupled circuit U2 sends, illustrate live wire and ground wire it
Between have electricity, live wire is normal；When not having electric current between live wire and ground wire, the second photoelectric coupled circuit U2 shut-off, control circuit receives the
The cut-off signals that two photoelectric coupled circuits U2 send, illustrate do not have electricity between live wire and ground wire, live wire exception, with electric leakage risk, control
Circuitry cuts live wire, zero line and ground wire, eliminate electric leakage hidden danger, improve electrical safety, it is ensured that Electrical Safety.
Second photoelectric coupled circuit U1 has two outfans, and one of outfan connects DC source by pull-up resistor R3
（5V）, and the detection pin T2, another output head grounding GND of control circuit are connected by current-limiting resistance R9.When the second optocoupler
When circuit U 2 is turned on, to the detection pin T2 of control circuit low level Continuity signal is sent；When the shut-off of the second photoelectric coupled circuit U2
When, send the cut-off signals of high level to the detection pin T2 of control circuit.
In the present embodiment, the second protection circuit plays a part of current-limiting protection, mainly includes 3rd resistor R6 and the 4th
Resistance R12, one end connection live wire L of 3rd resistor R6, the other end of 3rd resistor R6 connects one end of the 4th resistance R12, the
The intermediate node of the other end connection ground wire E of four resistance R12,3rd resistor R6 and the 4th resistance R12 connects the second photoelectric coupled circuit
The first input end of U2.
Three testing circuit mainly includes the 3rd protection circuit and the 3rd photoelectric coupled circuit U3；Zero line N is by the 3rd protection electricity
Road connects the first input end of the 3rd photoelectric coupled circuit U3, the second input connection ground wire E of the 3rd photoelectric coupled circuit U3, the 3rd optocoupler
The outfan of circuit U 3 connects the detection pin T3 of control circuit, output signal control of the control circuit according to the 3rd photoelectric coupled circuit U3
The break-make of hold line L, zero line N and ground wire E.
When having electric current between zero line N and ground wire E, electric current is transmitted to the 3rd photoelectric coupled circuit U3 by the 3rd protection circuit,
3rd photoelectric coupled circuit U3 is turned on, and control circuit receives the Continuity signal that the 3rd photoelectric coupled circuit U3 sends, illustrate zero line and ground wire it
Between have electricity, zero line or ground wire exception, with electric leakage risk, control circuit cut-out live wire, zero line and ground wire, eliminate electric leakage hidden danger,
Improve electrical safety, it is ensured that Electrical Safety；When there is no electric current between zero line and ground wire, the shut-off of the 3rd photoelectric coupled circuit U3, control
Circuit processed receives the cut-off signals that the 3rd photoelectric coupled circuit U3 sends, and illustrates do not have electricity between zero line and ground wire, and zero line and ground wire are normal.
3rd photoelectric coupled circuit U3 has two outfans, and one of outfan connects DC source by pull-up resistor R2
（5V）, and the detection pin T3, another output head grounding GND of control circuit are connected by current-limiting resistance R8.When the 3rd optocoupler
When circuit U 3 is turned on, to the detection pin T3 of control circuit low level Continuity signal is sent；When the shut-off of the 3rd photoelectric coupled circuit U3
When, send the cut-off signals of high level to the detection pin T3 of control circuit.
In the present embodiment, the 3rd protection circuit plays a part of current-limiting protection, mainly includes the 5th resistance R5 and the 6th
One end connection zero line N of resistance R11, the 5th resistance R5, the other end of the 5th resistance R5 connects one end of the 6th resistance R11, the
The other end connection ground wire E of six resistance R11, the intermediate node of the 5th resistance R5 and the 6th resistance R11 connects the 3rd photoelectric coupled circuit
The first input end of U3.
The power sense circuit of the present embodiment, control circuit according to the output signal of photoelectric coupled circuit control live wire, zero line,
The break-make of line, eliminates electric leakage hidden danger, improves electrical safety, it is ensured that Electrical Safety, it is ensured that the safety of whole circuit and user
Property.
Power sense circuit also includes the 4th detection circuit；4th detection circuit mainly includes test point T5, the 4th protection
Circuit and the 4th photoelectric coupled circuit U4；The first input end that ground wire E passes through the 4th protection circuit the 4th photoelectric coupled circuit U4 of connection, the 4th
Second input connecting detection point T5 of photoelectric coupled circuit U4, the outfan of the 4th photoelectric coupled circuit connects the detection pin of control circuit
T4.Control circuit controls the break-make of live wire L, zero line N and ground wire E according to the output signal of the 4th photoelectric coupled circuit U4.
Staff touch detection point T5, if ground wire E is powered, the electric current on ground wire E passes through the 4th protection circuit, the 4th light
Coupling circuit U 4, test point T5, human body flow into the earth so as to form current loop, due to the presence of the 4th protection circuit, flow through people
The electric current of body is very little, and human body is not injured completely；Meanwhile, the 4th photoelectric coupled circuit U4 conducting, control circuit receives the 4th light
The Continuity signal that coupling circuit U 4 sends, illustrates ground wire electrification, and with electric leakage risk, control circuit cuts off live wire, zero line and ground wire,
Electricity consumption hidden danger is eliminated, electrical safety is improved, it is ensured that Electrical Safety；If ground wire E is not charged, the 4th photoelectric coupled circuit U4 is closed
Disconnected, control circuit receives the cut-off signals that the 4th photoelectric coupled circuit U4 sends, and illustrates that ground wire is not charged, and ground wire is normal.
4th photoelectric coupled circuit U4 has two outfans, and one of outfan connects unidirectional current by pull-up resistor R13
Source（5V）, and the detection pin T4, another output head grounding GND of control circuit are connected by current-limiting resistance R15.When the 4th light
When coupling circuit U 4 is turned on, to the detection pin T4 of control circuit low level Continuity signal is sent；When the 4th photoelectric coupled circuit U4 is closed
When disconnected, to the detection pin T4 of control circuit the cut-off signals of high level are sent.
In the present embodiment, test point T5 is pad, and is associated with duplex microswitch SW, in order to staff touch,
Test point T5 is inherently touched if duplex microswitch SW staff is pressed.
In the present embodiment, the 4th protection circuit plays a part of current-limiting protection, mainly includes the 7th resistance R14 and the 8th
One end connection ground wire E of resistance R16, the 7th resistance R14, the other end of the 7th resistance R14 connects one end of the 8th resistance R16,
The intermediate node of the other end connecting detection point T5 of the 8th resistance R16, the 7th resistance R14 and the 8th resistance R16 connects the 4th light
The first input end of coupling circuit U 4.
For the ease of knowing whether ground wire E is powered, the 4th detection circuit also includes light emitting diode D4, light emitting diode D4
Anode connect the 7th resistance R14 and the 8th resistance R16 intermediate node, negative electrode connect the 4th photoelectric coupled circuit U4 first input
End.
Staff touch detection point T5, if ground wire E is powered, light emitting diode D4 has electric current to flow through, and light emitting diode D4 sends out
Light, points out ground wire E powered.
In the present embodiment, control circuit is respectively by live wire relay, zero line relay, ground wire Control fire
Line, zero line, the break-make of ground wire.
In the present embodiment, detect that circuit adds light-coupled isolation mode using resistance current limliting, so can be with completely isolated strong
Electricity and light current, behave whole circuit safer.
In the present embodiment, duplex microswitch SW, duplex microswitch SW bag are additionally provided with the 4th detection circuit
Include the first movable contact a, the first normally closed stationary contact b, the first normally opened stationary contact c, the second movable contact d, the second normally closed stationary contact e,
Two normally opened stationary contact f.
First movable contact a stationary contact bs normally closed with first, the first normally opened stationary contact c are corresponding, the first movable contact a connection ground wires
E, the first normally closed stationary contact b connect respectively the second input of the second input of the second photoelectric coupled circuit U2, the 3rd photoelectric coupled circuit U3
End, the first normally opened stationary contact c connects the 4th protection circuit.
Second movable contact d stationary contact es normally closed with second, the second normally opened stationary contact f are corresponding, the second movable contact d ground connection GND,
Second normally closed stationary contact e is hanging, and the second normally opened stationary contact f connects DC source by pull-up resistor R18（5V）, second is normally opened quiet
Contact f connects the detection pin S1 of control circuit by current-limiting resistance R17.
When duplex microswitch SW is not pressed, the first movable contact a and the first normally closed stationary contact b are contacted, and ground wire E connects respectively
Second input of logical second photoelectric coupled circuit U2 and the second input of the 3rd photoelectric coupled circuit U3, power sense circuit can pass through
Whether have an electric current between second detection electric circuit inspection live wire and ground wire, and by three testing circuit detect zero line and ground wire it
Between whether have electric current；Meanwhile, the second movable contact d and the second normally closed stationary contact e are contacted, and the detection pin S1 of control circuit is by upper
Pull-up resistor R18 is pulled to high level, and control circuit is identified as current detected state to carry out first, second, third detection circuit
Detection work, do not carry out the 4th detection circuit detection work.
When pressing duplex microswitch SW, the first movable contact a and the first normally closed stationary contact b disconnect, the first movable contact a and the
One normally opened stationary contact c contact, ground wire E connects the 4th protection circuit, while staff touches touch detection point T5, electric current can be from
Ground wire E flows to human body so as to flow into the earth by the 4th protection by touching test point T5, and power sense circuit can pass through the
Whether four detection electric circuit inspection ground wires are powered；Meanwhile, the second movable contact d and the second normally opened stationary contact f are contacted, the inspection of control circuit
Survey pin S1 and be pulled to low level, control circuit is identified as current detected state to carry out the detection of the first, the 4th detection circuit
Work, does not carry out the detection work of second, third detection circuit.
The switching of the second detection circuit, three testing circuit and the 4th detection circuit is carried out by duplex microswitch SW,
Control circuit detects that the high/low level that pin S1 is received would know that whether duplex microswitch SW is pressed by it, that is, control
Circuit knows whether to start to detect whether ground wire is powered so that detection process is relatively reliable, the generation of misoperation is reduced, to enter one
Step improves the accuracy and reliability of detection.
Further know the whether abnormal of power end for the ease of user, power sense circuit also includes display screen, control
Circuit control display screen is shown.For example, control circuit control display screen shows " power end abnormal electrical power supply ", " power end is supplied
It is electric normal ", " live wire is normal ", " live wire exception ", " zero line and ground wire exception ", " zero line and ground wire are normal ", " ground wire electrification ",
Information such as " ground wire are not charged ", carries out alarm, further to improve electrical safety.
The power sense circuit of the present embodiment, control circuit according to the output signal of photoelectric coupled circuit control live wire, zero line,
The break-make of line, eliminates electric leakage hidden danger, solves the safety caused because of power supply/jack connector mistake or imperfect earth hidden
Suffer from, improve electrical safety, it is ensured that Electrical Safety, it is ensured that the safety of whole circuit and user.
Based on the design of above-mentioned power sense circuit, the present embodiment also proposed a kind of electronic product, in electronic product
The described power sense circuit of design, the ground wire E of power sense circuit connects the shell of electronic product.
In the present embodiment, electronic product is water heater, television set, washing machine, refrigerator etc..
By designing described power sense circuit in electronic product, one is not connect in power supply/socket
During ground wire, outer casing electrification situation is detected before human contact's shell and power supply is automatically cut off；Two be can be in user's jack connector
Mistake, causes the ground wire misconnection power supply phase line of the electronic product casing for connecting so as to cause during outer casing electrification, can be in human contact
Connection before shell, between cut-out and power supply；Three is that power sense circuit can be integrated on the panel of electronic product, volume
It is little, space is saved, cost is reduced, and need not additionally increase leakage protecting plug, further reduces cost；Four is electricity
During sub- product use, if multiplexing electric abnormality, can fault message be shown on a display screen to point out user.
Therefore, by designing described power sense circuit in electronic product, it is to avoid electronic product casing electric leakage causes
Electricity consumption hidden danger, and cost is relatively low.
Certainly, described above is not that, to restriction of the present utility model, this utility model is also not limited to the example above,
Change, remodeling, addition or replacement that those skilled in the art are made in essential scope of the present utility model,
Also protection domain of the present utility model should be belonged to.
Claims (10)
1. a kind of power sense circuit, it is characterised in that：Including power end, the first detection circuit, the second detection circuit, the 3rd inspection
Slowdown monitoring circuit, control circuit, the power end includes live wire, zero line, ground wire；
The first detection circuit includes the first protection circuit and the first photoelectric coupled circuit；Live wire is by the first protection circuit connection the
The first input end of one photoelectric coupled circuit, the second input connection zero line of the first photoelectric coupled circuit, the outfan of the first photoelectric coupled circuit
Connection control circuit, control circuit controls the break-make of live wire, zero line and ground wire according to the output signal of the first photoelectric coupled circuit；
The second detection circuit includes the second protection circuit and the second photoelectric coupled circuit；Live wire is by the second protection circuit connection the
The first input end of two photoelectric coupled circuits, the second input connection ground wire of the second photoelectric coupled circuit, the outfan of the second photoelectric coupled circuit
Connection control circuit, control circuit controls the break-make of live wire, zero line and ground wire according to the output signal of the second photoelectric coupled circuit；
The three testing circuit includes the 3rd protection circuit and the 3rd photoelectric coupled circuit；Zero line is by the 3rd protection circuit connection the
The first input end of three photoelectric coupled circuits, the second input connection ground wire of the 3rd photoelectric coupled circuit, the outfan of the 3rd photoelectric coupled circuit
Connection control circuit, control circuit controls the break-make of live wire, zero line and ground wire according to the output signal of the 3rd photoelectric coupled circuit.
2. power sense circuit according to claim 1, it is characterised in that：The power sense circuit is also including the 4th inspection
Slowdown monitoring circuit；
The 4th detection circuit includes test point, the 4th protection circuit and the 4th photoelectric coupled circuit；Ground wire is by the 4th protection electricity
Road connects the first input end of the 4th photoelectric coupled circuit, the second input connecting detection point of the 4th photoelectric coupled circuit, the 4th optocoupler electricity
The outfan connection control circuit on road.
3. power sense circuit according to claim 1, it is characterised in that：First protection circuit includes first resistor
And second resistance, one end connection live wire of the first resistor, one end of the other end connection second resistance of the first resistor,
The intermediate node of the other end connection zero line of the second resistance, the first resistor and second resistance connects the first photoelectric coupled circuit
First input end.
4. power sense circuit according to claim 1, it is characterised in that：Second protection circuit includes 3rd resistor
With the 4th resistance, one end connection live wire of the 3rd resistor, the other end of the 3rd resistor connects one end of the 4th resistance,
The intermediate node of the other end connection ground wire of the 4th resistance, the 3rd resistor and the 4th resistance connects the second photoelectric coupled circuit
First input end.
5. power sense circuit according to claim 1, it is characterised in that：3rd protection circuit includes the 5th resistance
With the 6th resistance, one end connection zero line of the 5th resistance, the other end of the 5th resistance connects one end of the 6th resistance,
The intermediate node of the other end connection ground wire of the 6th resistance, the 5th resistance and the 6th resistance connects the 3rd photoelectric coupled circuit
First input end.
6. power sense circuit according to claim 2, it is characterised in that：4th protection circuit includes the 7th resistance
With the 8th resistance, one end connection ground wire of the 7th resistance, the other end of the 7th resistance connects one end of the 8th resistance,
The intermediate node of the other end connecting detection point of the 8th resistance, the 7th resistance and the 8th resistance connects the 4th optocoupler electricity
The first input end on road.
7. power sense circuit according to claim 6, it is characterised in that：The 4th detection circuit also includes luminous two
Pole pipe, the anode of the light emitting diode connects the intermediate node of the 7th resistance and the 8th resistance, and negative electrode connects the 4th optocoupler electricity
The first input end on road.
8. power sense circuit according to claim 2, it is characterised in that：The 4th detection circuit also includes that duplex is micro-
Dynamic switch,
The duplex microswitch include the first movable contact, the first normally closed stationary contact, the first normally opened stationary contact, the second movable contact,
Second normally closed stationary contact, the second normally opened stationary contact；
First movable contact connects ground wire, and the first normally closed stationary contact connects respectively the second input of the second photoelectric coupled circuit
End, the second input of the 3rd photoelectric coupled circuit, the first normally opened stationary contact connects the 4th protection circuit；
The second movable contact ground connection, the second normally closed stationary contact is hanging, and the second normally opened stationary contact passes through pull-up resistor
Connection DC source, and the second normally opened stationary contact connects the detection pin of control circuit.
9. power sense circuit according to any one of claim 1 to 8, it is characterised in that：The power sense circuit
Also include display screen, the control circuit control display screen is shown.
10. a kind of electronic product, it is characterised in that：Including power sense circuit as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621251092.1U CN206148921U (en) | 2016-11-22 | 2016-11-22 | Power source detection circuit and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621251092.1U CN206148921U (en) | 2016-11-22 | 2016-11-22 | Power source detection circuit and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206148921U true CN206148921U (en) | 2017-05-03 |
Family
ID=58626719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621251092.1U Withdrawn - After Issue CN206148921U (en) | 2016-11-22 | 2016-11-22 | Power source detection circuit and electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206148921U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410743A (en) * | 2016-11-22 | 2017-02-15 | 广东海信家电有限公司 | Power supply detection circuit and electronic product |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
-
2016
- 2016-11-22 CN CN201621251092.1U patent/CN206148921U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410743A (en) * | 2016-11-22 | 2017-02-15 | 广东海信家电有限公司 | Power supply detection circuit and electronic product |
| CN106410743B (en) * | 2016-11-22 | 2019-06-18 | 海信(广东)厨卫系统有限公司 | A kind of power sense circuit and electronic product |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN111722101B (en) * | 2020-05-29 | 2023-09-01 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170503 Effective date of abandoning: 20190618 |
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| AV01 | Patent right actively abandoned |