CN206452098U - The protection device and electric heater of power line - Google Patents
The protection device and electric heater of power line Download PDFInfo
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- CN206452098U CN206452098U CN201621404887.1U CN201621404887U CN206452098U CN 206452098 U CN206452098 U CN 206452098U CN 201621404887 U CN201621404887 U CN 201621404887U CN 206452098 U CN206452098 U CN 206452098U
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Abstract
The utility model discloses a kind of protection device of power line and electric heater, the protection device of the power line includes：Three-pole gang operated switch, three-pole gang operated switch is connected with three pole pins accesses zero line, live wire and the ground wire of power supply with connection and disjunction；First detection unit, the first detection unit is by detecting the electric leakage signal of zero line or live wire to judge whether zero line or live wire leak electricity；Zero fiery power-fail detection circuit, zero fiery power-fail detection circuit is used to detect the power-off signal between zero line and live wire to judge whether occur power down between zero line and live wire；Trip circuit, trip circuit generates the first dropout instruction, and the dropout of generation second instruction during generation power down between zero line and live wire when zero line or live wire leak electricity；Tripping mechanism, tripping mechanism is controlled when receiving the first dropout instruction or second threads off and instruct to three-pole gang operated switch, so that zero line, live wire and ground wire are in disjunction state, so as to effectively ensure Electrical Safety.
Description
Technical field
The utility model is related to household electrical appliance technical field, the protection device and a kind of electric heating of more particularly to a kind of power line
Hydrophone.
Background technology
At present, even if being provided with leakage protecting plug on the power line of electric heater, but zero fire of the socket in cooperation loses
After electricity (switch on such as user's operation shut-off power supply base), can also there are some potential safety hazards.For example, inside electric heater
Charging member occur insulation breakdown when, zero line or live wire can be caused to leak electricity.Or when supply line is abnormal, can also lead
Ground wire electrification is caused, because leakage protecting plug is disconnected power supply in itself, so electrocution-proof protection can not be carried out.In addition, electric leakage is protected
Shield plug also often causes over-heated fault occur because of poor fit with socket.
Accordingly, it would be desirable to targetedly be improved current electric heater.
Utility model content
The utility model is intended at least solve one of technical problem in above-mentioned technology to a certain extent.Therefore, this reality
It is to propose a kind of protection device of power line with a new purpose, can effectively ensures Electrical Safety.
Second purpose of the present utility model is to propose a kind of electric heater.
To achieve the above object, the utility model proposes a kind of protection device of power line, the power line includes three
Pole pin, three pole pin is attached with grafting form and external power receptacle, and the protection device includes：Link three poles
Switch, the three-pole gang operated switch is connected with three pole pin accesses zero line, live wire and the ground wire of power supply with connection and disjunction；
First detection unit, the first detection unit correspondence zero line and the live wire are set, and first detection unit passes through
The electric leakage signal of the zero line or the live wire is detected to judge whether the zero line or the live wire leak electricity；Zero fiery power down
Circuit is detected, described zero fiery power-fail detection circuit is used to detect the power-off signal between the zero line and the live wire to judge
State between zero line and the live wire and whether occur power down；Trip circuit, the trip circuit is sent out in the zero line or the live wire
The first dropout instruction is generated during life electric leakage, and the dropout of generation second refers to during generation power down between the zero line and the live wire
Order；Tripping mechanism, the tripping mechanism is connected with the trip circuit and the three-pole gang operated switch respectively, the tripping mechanism
The three-pole gang operated switch is controlled when receiving the first dropout instruction or described second threads off and instruct, so that institute
State zero line, the live wire and the ground wire and be in disjunction state.
According to the protection device of power line of the present utility model, the electric leakage of zero line or live wire is detected by the first detection unit
Signal judges whether zero line or live wire leak electricity, and is used to detect between zero line and live wire by zero fiery power-fail detection circuit
Judge power down whether occurs between zero line and live wire since power-off signal, then, occur by trip circuit in zero line or live wire
The first dropout instruction is generated during electric leakage, and the dropout of generation second is instructed during generation power down between zero line and live wire, finally, is passed through
Tripping mechanism is controlled when receiving the first dropout instruction or second threads off and instruct to three-pole gang operated switch, so that zero line,
Live wire and ground wire are in disjunction state, so as to effectively ensure Electrical Safety.
In addition, according to the utility model proposes the protection device of power line can also have technology additional as follows special
Levy：
Specifically, the protection device of described power line also includes：Second detection unit, the second detection unit correspondence
The ground wire is set, and second detection unit is incited somebody to action by detecting whether the ground wire is powered to generate ground wire electrification signal
The ground wire electrification signal is sent to the trip circuit so that the trip circuit is according to the ground wire electrification signal generation
Three, which thread off, is instructed, and the tripping mechanism is controlled when receiving the 3rd dropout instruction to the three-pole gang operated switch,
So that the zero line, the live wire and the ground wire are in disjunction state.
Specifically, the protection device of described power line also includes：Overtemperature detects circuit, and the overtemperature detection circuit is used for
The temperature of three pole pin is detected to generate temperature signal, and the temperature signal is sent to the trip circuit so that institute
State trip circuit and threaded off according to temperature signal generation the 4th and instructed, the tripping mechanism refers to receiving the 4th dropout
The three-pole gang operated switch is controlled when making, so that the zero line, the live wire and the ground wire are in disjunction state.
Specifically, the protection device of described power line also includes：First drive amplification circuit, first drive amplification
Circuit is connected with first detection unit, second detection unit and the trip circuit respectively, and first driving is put
Big circuit, and will be after amplification by the way that the electric leakage signal of the zero line or the live wire or the ground wire electrification signal are amplified
The zero line or the electric leakage signal or the ground wire electrification signal of the live wire send to the trip circuit.
Specifically, the protection device of described power line also includes：Upper electric triggers circuit, the upper electric triggers circuit is used for
Whether detect the power on signal between the zero line and the live wire upper electric between the zero line and the live wire to judge；Upper electricity
Actuating circuit, the upper electric actuating circuit is used for the power on signal for receiving the upper electric triggers circuit, and the upper electronic work of output refers to
Order；Upper electric actuating mechanism, the upper electric actuating mechanism is used to receive and perform the upper electronic upper electricity for making circuit output
Action command, with by controlling the three-pole gang operated switch to control the zero line, the live wire to be in connecting with the ground wire
State.
Specifically, the electric leakage of the zero line or the live wire that the trip circuit is detected in first detection unit
When current value is more than or equal to the first pre-set current value, judge that the zero line or the live wire leak electricity.
Specifically, the zero line and the live wire that the trip circuit is detected in described zero fiery power-fail detection circuit it
Between power down voltage be less than or equal to the first preset voltage value when, judge occur power down between the zero line and the live wire.
Specifically, the upper electric triggers circuit detect the upper piezoelectric voltage between the zero line and the live wire be more than etc.
When the second preset voltage value, upper electricity between the zero line and the live wire is judged.
Specifically, second detection unit is more than or equal to the second pre-set current value in the current value for detecting the ground wire
When, generate the ground wire electrification signal.
Specifically, the overtemperature detection circuit is more than or equal to preset temperature value in the temperature for detecting three pole pin
When, generate the temperature signal.
To achieve the above object, the utility model also proposed a kind of electric heater, including power line and body, wherein,
The power line includes：Three pole pins, three pole pin is attached with grafting form and external power receptacle；Above-mentioned implementation
The protection device of the power line of example；Mains cord and connector, the mains cord respectively with the protection device and the company
Connect device to be connected, the connector is used to connect the body.
According to electric heater of the present utility model, it, can be effectively by the protection device with above-mentioned power line
Ensure Electrical Safety.
In addition, according to the utility model proposes electric heater can also have technical characteristic additional as follows：
Specifically, inner bag and heater are provided with the body, control is also associated between the connector and the body
Warm device and thermal circuit beraker.
Brief description of the drawings
Fig. 1 is the structural representation of the protection device of the power line according to the utility model embodiment；
Fig. 2 is the structural representation of the electric heater according to the utility model embodiment；
Fig. 3 is the structural representation according to the utility model one embodiment power line；And
Fig. 4 is the electrical principle block diagram of the power line according to the utility model one embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Below in conjunction with the accompanying drawings come the protection device and electric heater of the power line that describes the utility model embodiment.
Fig. 1 is the structural representation of the protection device of the power line according to the utility model embodiment.The utility model is real
The protection device for applying the power line of example can be applied in the electrical equipment such as electric heater.Power line includes three pole pins 101, three pole pins
101 are attached with grafting form and external power receptacle, as shown in figure 1, the protection of the power line of the utility model embodiment
Device includes：The fiery power-fail detection circuit 104 of three-pole gang operated switch 102, the first detection unit 103, zero, trip circuit 105 and de-
Buckle mechanism 106.
Wherein, three-pole gang operated switch 102 is connected with three pole pins 101 accesses zero line N, the live wire of power supply with connection and disjunction
L and ground wire E.First detection unit 103 corresponding zero line N and live wire L are set, and the first detection unit 103 is by detecting zero line N or fire
Line L electric leakage signal is to judge whether zero line N or live wire L leak electricity.Zero fiery power-fail detection circuit 104 is used to detect zero line N
Power-off signal between live wire L is to judge whether occur power down between zero line N and live wire L.Trip circuit 105 in zero line N or
The first dropout instruction is generated when live wire L leaks electricity, and the dropout of generation second refers to during generation power down between zero line N and live wire L
Order.Tripping mechanism 106 is connected with trip circuit 105 and three-pole gang operated switch 102 respectively, and tripping mechanism 106 is receiving first
Three-pole gang operated switch 102 is controlled when dropout instruction or the second dropout instruction, so that zero line N, live wire L and ground wire E locate
In disjunction state.
Specifically, three pole pins 101 can for single-phase the two poles of the earth band three pole inserted sheets structure, and with grafting form and external electrical
Supply socket carries out city and is electrically connected.First detection unit 103 can be magnet coil.
In one embodiment of the present utility model, as shown in figure 1, the protection device of above-mentioned power line may also include：
First drive amplification circuit 109.First drive amplification circuit 109 is connected with the first detection unit 103 and trip circuit 105, the
One drive amplification circuit 109 is by the way that zero line N or live wire L electric leakage signal are amplified, and by the zero line N or live wire after amplification
L electric leakage signal is sent to trip circuit 105.
Further, trip circuit 105 is detected in the first detection unit 103 zero line N or live wire L leakage current value
During more than or equal to the first pre-set current value, judge that zero line N or live wire L leak electricity.Wherein, the first pre-set current value can be according to reality
Border situation is demarcated, and the scope of the first pre-set current value may be generally disposed within 30mA, and preferred value is 5mA, 6mA, 10mA
And 15mA.
In one embodiment of the present utility model, the protection device of power line can be applied in electric heater, if electric
Failure of insulation occurs for the electrification device inside water heater, then zero line N or live wire L can be caused to occur leaky.Pass through the first inspection
The detection of unit 103 zero line N or live wire L electric leakage signal is surveyed to judge whether zero line N or live wire L leak electricity, if detected
Zero line N or live wire L leakage current value are more than or equal to the first pre-set current value, then judge that zero line N or live wire L leak electricity.
When zero line N or live wire L leak electricity, zero line N or live wire L electric leakage signal are sent to the first drive amplification circuit 109, first
Drive amplification circuit 109 amplifies electric leakage signal, and the electric leakage signal after amplification is sent into trip circuit 105, by threading off
The generation of circuit 105 first, which is threaded off, to be instructed, and tripping mechanism 106 enters when receiving the first dropout instruction to three-pole gang operated switch 102
Row control, so that three-pole gang operated switch 102 produces trip action, the typically smaller than time equal to 0.1S can just cause three poles
Linked switch 102 finally makes zero line N, live wire L and ground wire E be in disjunction state, thus completely cut through from disconnection is switched to
Electrical connection between electric heater and external power source so that electric heater is in the state without electric safety, so as to effective
Ground ensures Electrical Safety.
In one embodiment of the present utility model, trip circuit 105 detected in zero fiery power-fail detection circuit 104 zero
When power down voltage between line N and live wire L is less than or equal to the first preset voltage value, judge to fall between zero line N and live wire L
Electricity.Wherein, the first preset voltage value can be demarcated according to actual conditions, and the scope of the first preset voltage value may be generally disposed at
Within 160V.
Specifically, detect the power-off signal between zero line N and live wire L to judge zero by zero fiery power-fail detection circuit 104
Whether occurs power down between line N and live wire L.If the power down magnitude of voltage detected between zero line N and live wire L is less than or equal to first
Preset voltage value, then judge occur power down between zero line N and live wire L.When occurring power down between zero line N and live wire L, by zero line
The power-off signal occurred between N and live wire L is transmitted directly to trip circuit 105, is threaded off and referred to by the generation of trip circuit 105 second
Order, tripping mechanism 106 is controlled when receiving the second dropout instruction to three-pole gang operated switch 102, so that three poles join
Dynamic switch 102 produces trip action, and the typically smaller than time equal to 0.5S can just make it that three-pole gang operated switch 102 is disconnected from being switched to
Open, zero line N, live wire L and ground wire E is in disjunction state, thus completely cut through electric heater and external power source
Between electrical connection so that electric heater is in the state without electric safety, so as to effectively ensure Electrical Safety.
According to the protection device of the power line of the utility model embodiment, zero line or live wire are detected by the first detection unit
Electric leakage signal judge whether zero line or live wire leak electricity, and be used to detect zero line and live wire by zero fiery power-fail detection circuit
Between power-off signal since judge power down whether occurs between zero line and live wire, then, by trip circuit in zero line or fire
The first dropout instruction is generated when line leaks electricity, and the dropout of generation second is instructed during generation power down between zero line and live wire, most
Afterwards, three-pole gang operated switch is controlled when receiving the first dropout instruction or second threads off and instruct by tripping mechanism, with
Zero line, live wire and ground wire is set to be in disjunction state, so as to effectively ensure Electrical Safety.
In one embodiment of the present utility model, as shown in figure 1, the protection device of above-mentioned power line may also include：
Second detection unit 107.The corresponding ground wire E of second detection unit 107 is set, and whether the second detection unit 107 is by detecting ground wire E
It is powered to generate ground wire electrification signal, and ground wire electrification signal is sent to trip circuit 105 so that the base area of trip circuit 105
Tape electric signal generation the 3rd, which is threaded off, to be instructed, and tripping mechanism 106 is when receiving the 3rd dropout instruction to three-pole gang operated switch 102
It is controlled, so that zero line N, live wire L and ground wire E are in disjunction state.Wherein, the second detection unit 107 can be electromagnetic wire
Circle.
In one embodiment of the present utility model, as shown in figure 1, the first drive amplification circuit 109 is also detected with second
Unit 107 is connected, and the first drive amplification circuit 109 is by the way that ground wire electrification signal is amplified, and by the ground strip after amplification
Electric signal is sent to trip circuit 105.
Further, trip circuit 105 is more than or equal to second in the current value that the second detection unit 107 detects ground wire E
During pre-set current value, ground wire electrification signal is generated.Wherein, the second pre-set current value can be demarcated according to actual conditions, and second
The scope of pre-set current value may be generally disposed within 30mA, and preferred value is 15mA and 30mA.
Specifically, if the external power source of electric heater is abnormal, the ground wire E of leakage protecting plug may be caused powered, then
So that electric heater is likely to become electrical body.Detect whether ground wire E is powered by the second detection unit 107, if detecting stream
The current value for crossing ground wire E is more than or equal to the second pre-set current value, then judges that ground wire E is powered, and export ground wire electrification signal.On ground
When line E is powered, ground wire electrification signal is amplified by the first drive amplification circuit 109, and by the ground wire electrification signal after amplification
Send to trip circuit 105, threaded off and instructed according to ground strip electric signal generation the 3rd by trip circuit 105, tripping mechanism 105
Three-pole gang operated switch 102 is controlled when receiving the 3rd dropout instruction, taken off so that three-pole gang operated switch 102 is produced
Pull work, typically smaller than the time equal to 0.3S just can so that three-pole gang operated switch 102 from disconnection is switched to, finally make zero line N,
Live wire L and ground wire E are in disjunction state, have thus completely cut through the electrical connection between electric heater and external power source, have made
Obtain electric heater and be in the state without electric safety, so as to effectively ensure Electrical Safety.
In one embodiment of the present utility model, as shown in figure 1, the protection device of above-mentioned power line may also include：
Overtemperature detects circuit 108.Overtemperature detection circuit 108 is used to detect the temperature of three pole pins 101 to generate temperature signal, and by temperature
Degree signal is sent to trip circuit 105 so that trip circuit 105 is according to the dropout instruction of temperature signal generation the 4th, tripping mechanism
106 are controlled when receiving the 4th dropout instruction to three-pole gang operated switch 102, so that zero line N, live wire L and ground wire E locate
In disjunction state.
In one embodiment of the present utility model, overtemperature detection circuit 108 is big in the temperature for detecting three pole pins 101
When equal to preset temperature value, temperature signal is generated.Wherein, preset temperature value can be demarcated according to actual conditions, preset temperature
The scope of angle value may be generally disposed within 180 DEG C.
Specifically, detect that circuit 108 detects the temperature of the zero line N of three pole pin 101, live wire L and each pins of ground wire E by overtemperature
Whether the temperature spent and generate temperature signal to judge three pole pins 101 is normal.If the temperature for detecting three pole pins 101 is big
In equal to preset temperature value, then judge that the temperature of three pole pins 101 is too high., will when the temperature for judging three pole pins 101 is too high
The temperature signal that overtemperature detection circuit 108 is generated is transmitted directly to trip circuit 105, is taken off by the generation of trip circuit 105 the 4th
Button instruction, tripping mechanism 106 is controlled when receiving the 4th dropout instruction to three-pole gang operated switch 102, so that three
Pole linked switch 102 produces trip action, and the typically smaller than time equal to 3min can just cause three-pole gang operated switch 102 from connection
To disconnection, zero line N, live wire L and ground wire E is in disjunction state, thus completely cut through electric heater and outside
Electrical connection between power supply so that electric heater is in the state without electric safety, so as to effectively prevent because of three pole pins
Temperature is too high to trigger dangerous, has further ensured the security of electricity consumption.
In one embodiment of the present utility model, as shown in figure 1, the protection device of above-mentioned power line may also include：
Upper electric triggers circuit 110, upper electric actuating circuit 111 and upper electric actuating mechanism 112.Wherein, upper electric triggers circuit 110 is used to detect
Whether the power on signal between zero line N and live wire L is upper electric between zero line N and live wire L to judge.Upper electric actuating circuit 111 is used for
The power on signal of electric triggers circuit 110 in reception, and export upper electric action command.Upper electric actuating mechanism 112 is used to receive and hold
The upper electric action command that electric actuating circuit 111 is exported on row, with by controlling three-pole gang operated switch 102 to control zero line N, live wire L
On-state is in ground wire E.
In one embodiment of the present utility model, upper electric triggers circuit 110 is being detected between zero line N and live wire L
When upper piezoelectric voltage is more than or equal to the second preset voltage value, upper electricity between zero line N and live wire L is judged.Wherein, the second preset voltage value
It can be demarcated according to actual conditions, the scope of the second preset voltage value is generally within 110V.
Specifically, the power on signal between zero line N and live wire L is detected by upper electric triggers circuit 110 with judge zero line N and
It is whether upper electric between live wire L.If the power on signal detected between zero line N and live wire L is more than or equal to the second preset voltage value,
Then judge that upper electricity occurs between zero line N and live wire L.Between zero line N and live wire L occur on electricity when, by zero line N and live wire L it
Between the power-off signal that occurs be sent to electric actuating circuit 111, upper electric actuating circuit 111 receives power on signal, and exports upper electricity
Action command, receives and performs the upper electric action command that upper electric actuating circuit 111 is exported, generally by upper electric actuating mechanism 112
Time less than or equal to 0.5S with regard to three-pole gang operated switch 102 can be controlled to connect, that is, causes zero line N, live wire L and ground wire E to be in
On-state, so that when the power line of electric heater recovers normal after a power failure, it can be ensured that electric heater enters work
State so that have hot water output in electric heater.
Fig. 2 is the structural representation of the electric heater according to the utility model embodiment.As shown in Fig. 2 the utility model
The electric heater of embodiment may include：Power line 100 and body 200.Wherein, as shown in figure 3, power line 100 may include：Three-level
Protection device 120, mains cord 130 and the connector 140 of pin 101, the power line of above-described embodiment description.Mains cord
130 are connected with protection device 120 and connector 140 respectively, and connector 140 is used to connect body 200.
Specifically, power line 100 is that electric heater is attached the device that realization is electrically connected with external power receptacle, is had
Switch on power, the function of disjunction power supply, zero fiery earth leakage protective, earth wire charged protecting overtemperature power-off protection and zero fiery power down protection.
Mains cord 130 is used for the protection device 120 of power line and the electrical connection of connector 140.Connector 140 is used for mains cord
Electrical connection between 130 and body 200.
In one embodiment of the present utility model, as shown in Fig. 2 being provided with inner bag 201 and heater 202 in body 200.
Thermostat 300 and thermal circuit beraker 400 are also associated between connector 130 and body 200.
Specifically, the inner bag 201 set in body 200 is positive displacement utensil, available for storage water.The heater set in body
202 can be used for heating the water that inner bag 201 is stored.As shown in figure 4, thermal circuit beraker 400 may be connected to the fire of power line 100
On line L and zero line N, the temperature that thermal circuit beraker 400 can be set by user carries out power-off protection to heater 202.Thermostat 300 can
It is connected between thermal circuit beraker 400 and body 200, the temperature that thermostat 300 can be set by user makes heater 202 and external electrical
Source is connected or disconnected automatically.
It should be noted that the details not disclosed in the electric heater of the utility model embodiment, refer to this practicality
Details disclosed in the protection device of the power line of new embodiment, specific I will not elaborate.
According to the electric heater of the utility model embodiment, it, can by the protection device with above-mentioned power line
Effectively ensure Electrical Safety.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be entered
Row is combined and combined.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (12)
1. a kind of protection device of power line, it is characterised in that the power line includes three pole pins, and three pole pin is with slotting
Connect form to be attached with external power receptacle, the protection device includes：
Three-pole gang operated switch, the three-pole gang operated switch is connected with three pole pin accesses the zero of power supply with connection and disjunction
Line, live wire and ground wire；
First detection unit, the first detection unit correspondence zero line and the live wire are set, first detection unit
By detecting the electric leakage signal of the zero line or the live wire to judge whether the zero line or the live wire leak electricity；
Zero fiery power-fail detection circuit, described zero fiery power-fail detection circuit is used to detect the power down between the zero line and the live wire
Signal is to judge whether occur power down between the zero line and the live wire；
Trip circuit, the trip circuit generates the first dropout when the zero line or the live wire leak electricity and instructed, and
Generation second, which is threaded off, when power down occurring between the zero line and the live wire instructs；
Tripping mechanism, the tripping mechanism is connected with the trip circuit and the three-pole gang operated switch respectively, the dropout machine
Structure is controlled when receiving the first dropout instruction or described second threads off and instruct to the three-pole gang operated switch, so that
The zero line, the live wire and the ground wire are in disjunction state.
2. the protection device of power line according to claim 1, it is characterised in that also include：
Second detection unit, the second detection unit correspondence ground wire is set, and second detection unit is by detecting
State ground wire whether powered to generate ground wire electrification signal, and the ground wire electrification signal is sent to the trip circuit so that institute
State trip circuit according to the ground wire electrification signal generation the 3rd thread off instruct, the tripping mechanism receive the described 3rd take off
The three-pole gang operated switch is controlled during button instruction, so that the zero line, the live wire and the ground wire are in disjunction
State.
3. the protection device of power line according to claim 1, it is characterised in that also include：
Overtemperature detects circuit, and the overtemperature detection circuit is used for the temperature for detecting three pole pin to generate temperature signal, and
The temperature signal is sent to the trip circuit so that the trip circuit generates the 4th dropout according to the temperature signal
Instruction, the tripping mechanism is controlled when receiving the 4th dropout instruction to the three-pole gang operated switch, so that institute
State zero line, the live wire and the ground wire and be in disjunction state.
4. the protection device of power line according to claim 2, it is characterised in that also include：
First drive amplification circuit, the first drive amplification circuit is detected with first detection unit, described second respectively
Unit is connected with the trip circuit, and the first drive amplification circuit is by by the electric leakage signal of the zero line or the live wire
Or the ground wire electrification signal is amplified, and by the zero line or the electric leakage signal of the live wire or the ground wire after amplification
Charged signal is sent to the trip circuit.
5. the protection device of power line according to claim 4, it is characterised in that also include：
Upper electric triggers circuit, the upper electric triggers circuit is used to detect the power on signal between the zero line and the live wire to sentence
It is disconnected whether upper electric between the zero line and the live wire；
Upper electric actuating circuit, the upper electric actuating circuit is used for the power on signal for receiving the upper electric triggers circuit, and exports
Electric action command；
Upper electric actuating mechanism, the upper electric actuating mechanism is used to receive and perform the upper electronic upper electricity for making circuit output
Action command, with by controlling the three-pole gang operated switch to control the zero line, the live wire to be in connecting with the ground wire
State.
6. the protection device of power line according to claim 5, it is characterised in that the trip circuit is in the described first inspection
When the zero line or the leakage current value of the live wire that survey unit is detected are more than or equal to the first pre-set current value, judge described
Zero line or the live wire leak electricity.
7. the protection device of power line according to claim 5, it is characterised in that the trip circuit falls in zero fire
When power down voltage between the zero line and the live wire that power detection circuit is detected is less than or equal to the first preset voltage value, sentence
It is disconnected to occur power down between the zero line and the live wire.
8. the protection device of power line according to claim 5, it is characterised in that the upper electric triggers circuit is being detected
When upper piezoelectric voltage between the zero line and the live wire is more than or equal to the second preset voltage value, the zero line and the fire are judged
Upper electricity between line.
9. the protection device of power line according to claim 5, it is characterised in that second detection unit is being detected
When the current value of the ground wire is more than or equal to the second pre-set current value, the ground wire electrification signal is generated.
10. the protection device of power line according to claim 3, it is characterised in that the overtemperature detection circuit is in detection
When being more than or equal to preset temperature value to the temperature of three pole pin, the temperature signal is generated.
11. a kind of electric heater, it is characterised in that including power line and body, wherein, the power line includes：
Three pole pins, three pole pin is attached with grafting form and external power receptacle；
The protection device of power line according to any one of claim 1-10；
Mains cord and connector, the mains cord are connected with the protection device and the connector respectively, the connection
Device is used to connect the body.
12. electric heater according to claim 11, it is characterised in that inner bag and heater, institute are provided with the body
State and be also associated with thermostat and thermal circuit beraker between connector and the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621404887.1U CN206452098U (en) | 2016-12-20 | 2016-12-20 | The protection device and electric heater of power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621404887.1U CN206452098U (en) | 2016-12-20 | 2016-12-20 | The protection device and electric heater of power line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206452098U true CN206452098U (en) | 2017-08-29 |
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ID=59673426
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621404887.1U Active CN206452098U (en) | 2016-12-20 | 2016-12-20 | The protection device and electric heater of power line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206452098U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011351A (en) * | 2016-12-20 | 2018-05-08 | 芜湖美的厨卫电器制造有限公司 | The protective device and electric heater of power cord |
| CN108870764A (en) * | 2018-08-30 | 2018-11-23 | 芜湖美的厨卫电器制造有限公司 | A kind of power-off protection apparatus and electric heater of electric heater |
-
2016
- 2016-12-20 CN CN201621404887.1U patent/CN206452098U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011351A (en) * | 2016-12-20 | 2018-05-08 | 芜湖美的厨卫电器制造有限公司 | The protective device and electric heater of power cord |
| CN108870764A (en) * | 2018-08-30 | 2018-11-23 | 芜湖美的厨卫电器制造有限公司 | A kind of power-off protection apparatus and electric heater of electric heater |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220913 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East Wuhu economic and Technological Development Zone, Wuhu, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. Patentee before: MIDEA GROUP Co.,Ltd. |
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| TR01 | Transfer of patent right |