CN206831846U - Electric heater and its protection device - Google Patents
Electric heater and its protection device Download PDFInfo
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- CN206831846U CN206831846U CN201720613871.XU CN201720613871U CN206831846U CN 206831846 U CN206831846 U CN 206831846U CN 201720613871 U CN201720613871 U CN 201720613871U CN 206831846 U CN206831846 U CN 206831846U
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Abstract
The utility model discloses a kind of electric heater and its protection device, the protection device includes：Three-pole gang operated switch, three-pole gang operated switch are connected with three pole pins with zero line, live wire and the ground wire of connection and disjunction access power supply；Current detection module, current detection module be used for detect the water inlet of electric heater body or the water flow signal of delivery port with judge electric heater whether water outlet；Current actuating circuit, current actuating circuit are connected with current detection module, and current actuating circuit generates the first dropout instruction in electric heater water outlet；Trip circuit, trip circuit are connected with current actuating circuit, and trip circuit is used to receive the first dropout instruction；Tripping mechanism, tripping mechanism are connected with three-pole gang operated switch and trip circuit respectively, and tripping mechanism is used to perform the first dropout instruction, with by controlling three-pole gang operated switch to control zero line, live wire and ground wire to be in disjunction state.According to protection device of the present utility model, it is capable of the Electrical Safety of effective guarantee electric heater.
Description
Technical field
It the utility model is related to household electrical appliance technical field, protection device and one kind electricity of more particularly to a kind of electric heater
Water heater.
Background technology
Electric heater has the advantages that energy-conserving and environment-protective, easy to use, and the Electrical Safety of electric heater is electric heater all the time
Focal issue during design and manufacture and use.
Current electric heater is provided with water outlet power down function mostly, can specifically be controlled in user's water heater after
Electrical equipment is disconnected to stop to heating installation power supply.It is usually micro- disrupted configuration yet with used relay, breaks in relay
Do not make to reach fully powered-off isolation effect between electric heater and external power source after opening, therefore the security of electric heater at present
It is high not enough.
Utility model content
The utility model is intended to one of technical problem at least solving in above-mentioned technology to a certain extent.Therefore, this reality
It is to propose a kind of protection device of electric heater with a new purpose, is capable of the electricity consumption peace of effective guarantee electric heater
Entirely.
Second purpose of the present utility model is to propose a kind of electric heater.
To reach above-mentioned purpose, the utility model first aspect embodiment proposes a kind of protection device of electric heater,
Wherein, the electric heater includes power line and body, and the power line includes three pole pins, and three pole pin is with grafting shape
Formula is attached with external power receptacle, and the protection device includes：Three-pole gang operated switch, the three-pole gang operated switch with it is described
Three pole pins are connected to connect zero line, live wire and ground wire with disjunction access power supply；Current detection module, the current detect mould
Block is used to detect the water inlet of the electric heater body or the water flow signal of delivery port whether to judge the electric heater
Water outlet；Current actuating circuit, the current actuating circuit are connected with the current detection module, and the current actuating circuit is in institute
State current detection module and judge the dropout of generation first instruction during the electric heater water outlet；Trip circuit, the trip circuit with
The current actuating circuit is connected, and the trip circuit is used to receive the first dropout instruction；Tripping mechanism, the dropout machine
Structure is connected with the three-pole gang operated switch and the trip circuit respectively, and the tripping mechanism is used to perform described first and thread off to refer to
Order, with by controlling the three-pole gang operated switch to control zero line, the live wire and the ground wire to be in disjunction state.
According to the protection device of electric heater of the present utility model, water flow signal is detected by current detection module to sentence
Breaking electric water heater whether water outlet, current actuating circuit can be generated in electric heater water outlet first dropout instruction, trip circuit can
Receive first dropout to instruct and drive de- mouth mechanism to perform the first dropout instruction, with by controlling three-pole gang operated switch to control
Zero line, live wire and the ground wire of electric heater power supply are in disjunction state, extremely electric thereby, it is possible to automatically cut off three when with water
Source, so as to the Electrical Safety of effective guarantee electric heater.
In addition, according to the utility model proposes the protection device of electric heater can also have technology additional as follows special
Sign：
Specifically, the current detection module includes：Water flow sensing unit component, the water flow sensing unit component are arranged on institute
The water inlet or delivery port of electric heater body are stated, to generate the water according to the water-carrying capacity of the water inlet or the delivery port
Flow signal；Current arithmetic processing circuit, the current arithmetic processing circuit are connected with the water flow sensing unit component, the water
Stream arithmetic processing circuit be used for according to the water flow signal judge the electric heater whether water outlet.
Further, the current arithmetic processing circuit includes power subsystem, timing unit, computing judging unit and interface
Unit, wherein, the power subsystem respectively with the timing unit, the computing judging unit, the interface unit and described
Water flow sensing unit component, which is connected, thinks that the timing unit, the computing judging unit, the interface unit and the current pass
Sensor component is powered；The computing judging unit is connected with the water flow sensing unit component and the timing unit respectively,
The computing judging unit judges the electric heating when judging that water-carrying capacity is more than the first preset flow according to the water flow signal
Hydrophone water outlet, and judge that the electric heater stops when judging that water-carrying capacity is less than the second preset flow according to the water flow signal
Only water outlet, and timing is started to obtain continuously stopping water outlet by the timing unit when the electric heater stops water outlet
Time, wherein, the computing judging unit generates water outlet cut-offing instruction in the electric heater water outlet, and in the electric hot water
Device stops water outlet and continuously stops generation stopping water outlet reset instruction when water discharging time reaches the first preset time, wherein, it is described
First preset flow is more than second preset flow；The interface unit respectively with the computing judging unit and the current
Actuating circuit is connected so that the computing judging unit water outlet cut-offing instruction is sent to by the interface unit it is described
Current actuating circuit, threaded off and instructed according to water outlet cut-offing instruction generation described first so as to the current actuating circuit.
Further, the computing judging unit is also sent the stopping water outlet reset instruction by the interface unit
To the current actuating circuit, so that the current actuating circuit is according to electronic in the stopping water outlet reset instruction generation first
Instruct, the protection device also includes：Upper electric actuating circuit, the upper electric actuating circuit and the current actuating circuit phase
Even, the upper electric actuating circuit is used to receive electric action command on described first；Upper electric actuating mechanism, the upper electric actuating mechanism
It is connected with the upper electric actuating circuit, the upper electric actuating mechanism is used to perform electric action command on described first, to pass through control
Making the three-pole gang operated switch controls zero line, the live wire and the ground wire to be in on-state.
Further, the protection device of described electric heater also includes：First detection unit, first detection unit
The corresponding zero line and the live wire are set, and first detection unit is used for the electric leakage letter for detecting the zero line or the live wire
Number；Second detection unit, second detection unit correspond to the ground wire and set, and second detection unit is described for detecting
The charged signal of ground wire；Zero fiery power-fail detection circuit, the zero fiery power-fail detection circuit are used to detect the zero line and the fire
Power-off signal between line；Overtemperature detects circuit, and the overtemperature detection circuit is used for the temperature signal for detecting three pole pin,
Wherein, the trip circuit respectively with first detection unit, second detection unit, the zero fiery power-fail detection circuit
It is connected with overtemperature detection circuit, the trip circuit is judging that the zero line or the live wire are sent out according to the electric leakage signal
The dropout of generation second is instructed during raw electric leakage, when judging the ground wire electrification according to the charged signal, generation the 3rd is threaded off and referred to
Make, according to the power-off signal judge between the zero line and the live wire occur power down when generation the 4th thread off instruction,
Judge that the dropout of generation the 5th instructs during the three pole pin overtemperature according to the temperature signal, the tripping mechanism is used to perform institute
State the second dropout instruction, the 3rd thread off instruction, the 4th thread off and instruction or the 5th thread off instruction, with by controlling three pole to link
Switch controls zero line, the live wire and the ground wire to be in disjunction state.
Further, the protection device of described electric heater also includes：First drive amplification circuit, first driving
Amplifying circuit is connected with first detection unit, second detection unit and the trip circuit respectively, and described first drives
Dynamic amplifying circuit by the way that the electric leakage signal or the charged signal are amplified, and by the electric leakage signal after amplification or
The charged signal is sent to the trip circuit.
Wherein, the zero line or the electric leakage electricity of the live wire that the trip circuit detects in first detection unit
When flow valuve is more than or equal to the first pre-set current value, judge that the zero line or the live wire leak electricity；The trip circuit is in institute
When stating the current value of the ground wire that the second detection unit detects and being more than or equal to the second pre-set current value, the ground strip is judged
Electricity；Power down voltage of the trip circuit between the zero line and the live wire that described zero fiery power-fail detection circuit detects
During less than or equal to the first preset voltage value, judge power down occurs between the zero line and the live wire；The trip circuit is in institute
When stating the temperature of three pole pin that overtemperature detection electric circuit inspection arrives and being more than or equal to preset temperature value, three pole pin is judged
Overtemperature.
Further, the protection device of described electric heater also includes：Upper electric triggers circuit, the upper electric triggers circuit
It is whether upper electric between the zero line and the live wire to judge for detecting the power on signal between the zero line and the live wire,
Wherein, electric action command in generation second when the upper electric actuating circuit is used between the zero line and the live wire electric,
The upper electric actuating mechanism is used to perform electric action command on described second, with by controlling the three-pole gang operated switch to control institute
State zero line, the live wire and the ground wire and be in on-state.
Wherein, upper piezoelectric voltage of the upper electric triggers circuit between the zero line and the live wire detected be more than etc.
When the second preset voltage value, upper electricity between the zero line and the live wire is judged.
To reach above-mentioned purpose, the utility model second aspect embodiment proposes a kind of electric heater, and it includes this reality
The protection device of the electric heater proposed with new first aspect embodiment.
, being capable of effective guarantee Electrical Safety according to the electric heater of the utility model embodiment.
Brief description of the drawings
Fig. 1 is the structural representation according to the electric heater of the utility model one embodiment；
Fig. 2 is the electrical schematic according to the electric heater of the utility model one embodiment；
Fig. 3 is the structural representation according to the electric heater including protection device of the utility model one embodiment；
Fig. 4 is the structural representation according to the current arithmetic processing circuit of 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 is represented to same or similar label eventually or there is the element of same or like function.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.
The protection device of the electric heater of the utility model embodiment described below in conjunction with the accompanying drawings.
As shown in figure 1, the electric heater of the utility model embodiment is in addition to including the (not shown in figure 1) of protection device 100,
May also include power line 200 and body 300, as depicted in figs. 1 and 2, body 300 may include thermal circuit beraker 310, thermostat 320,
Heater 330 and inner bag 340, power line 200 may include three pole pins 210, and three pole pins 210 can be with grafting form and external electrical
Supply socket is attached.
Wherein, inner bag 340 is positive displacement utensil, and for water storage, heater 330 is used to heat inner bag water storage.Control
Warm device 320 is a kind of mechanical device that temperature-sensitive control is carried out with liquid working substance, and thermostat 320 can be controlled by the first temperature threshold
Heater 330 and external power source turn on automatically or disconnection, and then the water temperature of inner bag is controlled in the range of setting.Such as Fig. 2 institutes
Show, thermostat 320 may be provided on the live wire L of power supply, to be disconnected when the water temperature of inner bag meets or exceeds the first temperature threshold
Live wire connects.In one embodiment of the present utility model, the first temperature threshold of thermostat 320 can be the temperature less than 85 DEG C
Value.Thermal circuit beraker 310 is a kind of mechanical device that temperature-sensitive control is carried out with liquid working substance or bimetallic element, thermal circuit beraker
310 can carry out power-off protection by second temperature threshold value to heater 330, can specifically be worked back by cutting off heater 330 simultaneously
The live wire L and zero line N on road extremely prevent that inner bag temperature is too high, and second temperature threshold value can not be changed by the user, and powered off
It can not be automatically reset after protection.In one embodiment of the present utility model, the second temperature threshold value of thermal circuit beraker 310 can be low
In 110 DEG C of temperature value.
Fig. 3 is the structural representation according to the protection device of the electric heater of the utility model embodiment.
As shown in figure 3, the protection device 100 of the electric heater of the utility model embodiment, including three-pole gang operated switch
110th, current detection module 120, current actuating circuit 130, trip circuit 140 and tripping mechanism 150.
Wherein, three-pole gang operated switch 110 is connected with three pole pins 210 with zero line N, the live wire of connection and disjunction access power supply
L and ground wire E；Current detection module 120 is used to detect the water inlet of electric heater body or the water flow signal of delivery port to sentence
Breaking electric water heater whether water outlet；Current actuating circuit 130 is connected with current detection module 120, and current actuating circuit 130 is in current
Detection module 120 judges the dropout of generation first instruction during electric heater water outlet；Trip circuit 140 and the phase of current actuating circuit 130
Even, trip circuit 140 is used to receive the first dropout instruction；Tripping mechanism 150 respectively with three-pole gang operated switch 110 and trip circuit
140 are connected, and tripping mechanism 150 is used to perform the first dropout instruction, with by controlling three-pole gang operated switch 110 to control zero line N, fire
Line L and ground wire E are in disjunction state.
In one embodiment of the present utility model, as depicted in figs. 1 and 2, current detection module 120 may include that current pass
Sensor component 121 and current arithmetic processing circuit 122.Wherein, water flow sensing unit component 121 may be provided in electric heater body
The water inlet or delivery port of inner bag 340, to generate water flow signal according to the water-carrying capacity of water inlet or delivery port, wherein, current
It can be the pulse signal corresponding with water-carrying capacity size, current signal or voltage signal to measure signal.Current arithmetic processing circuit 122
It is connected with water flow sensing unit component 121, current arithmetic processing circuit 122 is used to whether judge electric heater according to water flow signal
Water outlet.
In one embodiment of the present utility model, as shown in figure 4, current arithmetic processing circuit 122 may include power supply list
Member 01, timing unit 02, computing judging unit 03 and interface unit 04.
Wherein, power subsystem 01 respectively with timing unit 02, computing judging unit 03, interface unit 04 and water flow sensing unit
Component 121, which is connected, thinks that timing unit 02, computing judging unit 03, interface unit 04 and water flow sensing unit component 121 are supplied
Electricity.
In one embodiment of the present utility model, power subsystem 01 may include transformer, current rectifying and wave filtering circuit and charging
Discharge circuit, wherein, transformer can be the zero line N-terminal and live wire L of the transformer with electrical isolation, its input and power line
End is connected, and power supply is output to rectification wave circuit after transformer pressure-reducing.Current rectifying and wave filtering circuit can be by after transformer pressure-reducing
Alternating current is converted to after direct current to water flow sensing unit component 121, timing unit 02, computing judging unit 03 and interface unit 04
Power supply.Charge and discharge circuit includes battery, and charge and discharge circuit can supply electricity to battery by the direct current that current rectifying and wave filtering circuit exports and fill
Electricity, it can also be continued after power supply disconnection by battery discharge to water flow sensing unit component 121, timing unit 02, computing judgement list
Member 03 and interface unit 04 power, and its charging capacity can ensure power supply disconnect after the continued power time at least above
25min。
Computing judging unit 03 is connected with water flow sensing unit component 121 and timing unit 02 respectively, computing judging unit 03
Electric heater water outlet is can determine whether when judging that water-carrying capacity is more than the first preset flow according to water flow signal, and according to water-carrying capacity
Signal judges to can determine whether that electric heater stops water outlet when water-carrying capacity is less than the second preset flow, and stops water outlet in electric heater
When can start timing by timing unit 02 to obtain continuously stopping water discharging time.Wherein, computing judging unit 03 can be in electric heating
Water outlet cut-offing instruction is generated during hydrophone water outlet, and it is pre- to reach first in electric heater stopping water outlet and continuously stopping water discharging time
If generation stops water outlet reset instruction during the time, wherein, the first preset flow is more than the second preset flow.
Interface unit 04 is connected with computing judging unit 03 and current actuating circuit 130 respectively, so that computing judging unit
Water outlet cut-offing instruction is sent to current actuating circuit 130 by 03 by interface unit 04, so that current actuating circuit 130 is according to going out
Water cut-offing instruction generation first, which is threaded off, to be instructed.Wherein, isolated company can be used between current actuating circuit 130 and interface unit 04
Connect, such as can realize that signal transmits by optocoupler, or transmission of wireless signals can be carried out.
In one embodiment of the present utility model, computing judging unit 03 can also will stop water outlet by interface unit 04
Reset instruction is sent to current actuating circuit 130, so that current actuating circuit 130 generates first according to water outlet reset instruction is stopped
Upper electric action command.As shown in figure 3, the protection device 100 of the utility model embodiment may also include the electric He of actuating circuit 160
Upper electric actuating mechanism 170, wherein, upper electric actuating circuit 160 is connected with current actuating circuit 130, and upper electric actuating circuit 160 is used for
Electric action command on first is received, upper electric actuating mechanism 170 is connected with upper electric actuating circuit 160, and upper electric actuating mechanism 170 is used for
Electric action command on first is performed, with by controlling three-pole gang operated switch 110 to control zero line N, live wire L and ground wire E to be in connecing
Logical state.
In a specific embodiment of the present utility model, the water flow signal that water flow sensing unit component 121 exports is through water
Flow arithmetic processing circuit 122 and carry out computing judgement, if water-carrying capacity Q is more than or equal to the first preset flow QD, pass through interface unit
04 exports water outlet cut-offing instruction to current actuating circuit 130, then exports the first dropout by current actuating circuit 130 and instruct to dropout
Circuit 140, then the driving tripping mechanism 150 of trip circuit 140 execution act and then make three-pole gang operated switch 110 by on-state
Disjunction state is switched to, final zero line N, live wire L and the ground wire E for causing electric heater is in disjunction state, it is achieved thereby that
The water outlet power-off protection function of electric heater.Wherein, the first preset flow QD setting range can be 0.8~2L/min.
In a specific embodiment of the present utility model, the water flow signal that water flow sensing unit component 121 exports is through water
Flow arithmetic processing circuit 122 and carry out computing judgement, if water-carrying capacity Q is less than the second preset flow QF and water time T is used in continuous stopping
More than or equal to the first preset time T F, then exported by interface unit 04 to current actuating circuit 130 and stop water outlet reset instruction,
Electric action command on first is exported by current actuating circuit 130 again and, to upper electric actuating circuit 160, then goes up electric actuating circuit 160
The electric execution of actuating mechanism 170 acts and then three-pole gang operated switch 110 is switched on state by disjunction state in driving, finally
Electric heater is set to be restored electricity after water outlet is stopped, it is achieved thereby that the stopping water outlet reset function of electric heater, so as to electric heating
The work such as hydrophone recovery heating.Wherein, the second preset flow QF setting range can be 0~1L/min, the first preset time T F
Setting range can be 0~25min.
According to the protection device of the electric heater of the utility model embodiment, water-carrying capacity is detected by current detection module and believed
Number with judge electric heater whether water outlet, current actuating circuit can be generated in electric heater water outlet first dropout instruction, thread off
Circuit can receive first dropout and instruct and drive de- mouth mechanism to perform the first dropout instruction, to be opened by controlling three poles to link
Zero line, live wire and the ground wire for closing control electric heater power supply are in disjunction state, and thereby, it is possible to automatically cut off three when with water
Pole power supply, so as to the Electrical Safety of effective guarantee electric heater.
The electric heater of the utility model embodiment can not only have above-mentioned water outlet power-off protection function and stop water outlet
Reset function, can also have zero fiery creepage protection function, earth wire charged protecting function, zero fiery power-down protection, overtemperature prote
Function and on electrically connect function etc..
As shown in figure 3, the protection device 100 of the electric heater of the utility model embodiment may also include the first detection unit
180th, the second detection unit 190, zero fiery power-fail detection circuit 1100, overtemperature detection circuit 1110, the first drive amplification circuit
1120 and upper electric triggers circuit 1130.
Wherein, 180 corresponding zero line N and live wire L of the first detection unit are set, and the first detection unit 180 is used to detect zero line N
Or live wire L electric leakage signal, 190 corresponding ground wire E of the second detection unit are set, the second detection unit 190 is used to detect ground wire E's
Charged signal.First drive amplification circuit 1120 respectively with the first detection unit 180, the second detection unit 190 and trip circuit
140 are connected, and the first drive amplification circuit 1120 is by the way that electric leakage signal or charged signal are amplified, and by the electric leakage after amplification
Signal or charged signal are sent to trip circuit.In one embodiment of the present utility model, the first detection unit 180 and second
Detection unit 190 may each comprise detection coil.
Trip circuit 140 by the first drive amplification circuit 1120 respectively with the first detection unit 180, the second detection unit
190 are connected.In one embodiment of the present utility model, zero line that trip circuit 140 can detect in the first detection unit 180
When N or live wire L leakage current value are more than or equal to the first pre-set current value, judge that zero line N or live wire L leak electricity, and
When the current value for the ground wire E that two detection units 190 detect is more than or equal to the second pre-set current value, judge that ground wire E is powered.Thread off
Circuit 140 can generate the second dropout instruction when judging that zero line or live wire leak electricity according to electric leakage signal, and can be according to band
Electric signal judges the dropout of generation the 3rd instruction during ground wire electrification, the executable second dropout instruction of tripping mechanism 150 or the 3rd dropout
Instruction, with by controlling three-pole gang operated switch 110 to control zero line N, live wire L and ground wire E to be in disjunction state.
The power-off signal that zero fiery power-fail detection circuit 1100 can be used between detection zero line N and live wire L, trip circuit 140
It is connected with zero fiery power-fail detection circuit 1100, in one embodiment of the present utility model, trip circuit 140 can be in zero fiery power down
When power down voltage between zero line N and live wire L that detection circuit 1100 detects is less than or equal to the first preset voltage value, zero is judged
Power down occurs between line N and live wire L.Trip circuit 140 is judging power down occurs between zero line N and live wire L according to power-off signal
Shi Shengcheng the 4th, which threads off, to be instructed, and tripping mechanism 150 the executable 4th, which is threaded off, to be instructed, with by controlling three-pole gang operated switch 110 to control
Zero line N, live wire L and ground wire E processed are in disjunction state.
Overtemperature detection circuit 1110 can be used for the temperature signal of three pole pins 210 of detection, and trip circuit 140 detects with overtemperature
Circuit 1110 is connected, and in one embodiment of the present utility model, trip circuit 140 can detect circuit 1110 in overtemperature and detect
The temperature of three pole pins 210 when being more than or equal to preset temperature value, judge the overtemperature of three pole pin 210.Trip circuit 140 is in basis
Temperature signal judges the dropout of generation the 5th instruction during three pole 210 overtemperatures of pin, and tripping mechanism 150 can perform the 5th dropout instruction,
With by controlling three-pole gang operated switch 110 to control zero line N, live wire L and ground wire E to be in disjunction state.
Upper electric triggers circuit 1130 is used to detect the power on signal between zero line N and live wire L to judge zero line N and live wire L
Between whether upper electricity, specifically, upper piezoelectric voltage of the upper electric triggers circuit 1130 between the zero line N and live wire L detected is more than
During equal to the second preset voltage value, upper electricity between zero line N and live wire L is judged.Upper electric actuating circuit 160 can also be in zero line N and fire
Electric action command, upper electric actuating mechanism 170 can perform electric action command on second in generation second when upper electric between line L, with logical
Crossing control three-pole gang operated switch 110 controls zero line N, live wire L and ground wire E to be in on-state.
In a specific embodiment of the present utility model, when the zero line N or live wire L of electric heater leak electricity, the
One electromagnetic induction coil can detect leakage current value Iln caused by zero line or live wire, if leakage current value Iln is more than or equal to
First pre-set current value Iln1, then the zero fiery electric leakage signal is amplified by the first drive amplification circuit 1120 handles backward take off
Button circuit 140 sends the second dropout instruction, and then trip circuit 140 drives tripping mechanism 150 to perform trip action and then makes three
Pole linked switch 110 acts, final that zero line N, the live wire L of electric heater and the poles of ground wire E tri- are switched fast by on-state
To disjunction state, it is achieved thereby that zero fiery creepage protection function of electric heater.Wherein, the first pre-set current value Iln1 scope
Can be within 30mA, and preferred value is 5mA, 6mA, 10mA, 15mA, detects that zero line or live wire leak by the first electromagnetic induction coil
Electric current value Iln is more than or equal to the first pre-set current value Iln1 and starts to three-pole gang operated switch 110 to complete needed for disjunction action
Time is smaller than being equal to 0.1s.
In a specific embodiment of the present utility model, cause when because supply line is abnormal on the ground wire of electric heater
Have electric current by when, the second electromagnetic induction coil can detect ground wire E current value Ie, if ground wire E current value Ie is more than etc.
In the second pre-set current value Ie1, then it is backward by the first drive amplification circuit 1120 to be amplified processing for the ground wire electrification signal
Trip circuit 140 sends the 3rd dropout instruction, and then trip circuit 140 drives tripping mechanism 150 to perform trip action and then made
Three-pole gang operated switch 110 is acted, and final zero line N, live wire L and the poles of ground wire E tri- for causing electric heater is quickly cut by on-state
Disjunction state is changed to, it is achieved thereby that the earth wire charged protecting function of electric heater.Wherein, the second pre-set current value Ie1 model
Enclosing can be within 30mA, and preferred value is 15mA, 30mA, detects that ground wire E current value Ie is big by the second electromagnetic induction coil
In equal to the second pre-set current value Ie1 start to three-pole gang operated switch 110 complete disjunction action needed for time be smaller than being equal to
0.3s。
In a specific embodiment of the present utility model, when zero fiery power-fail detection circuit 1100 detects zero line N and fire
When having the power down process that unexpected moment declines since normal working voltage between line L, if power down voltage Ulnd is less than or equal to the
One preset voltage value Ulnd1, then exportable zero fiery power-off signal is to trip circuit 140, and sends the 4th by trip circuit 140 and take off
Button instruction, to drive the execution of tripping mechanism 150 to act and then three-pole gang operated switch 110 is switched to disjunction state by connection, most
Zero line N, live wire L and the ground wire E tri- of electric heater is caused extremely fast to be switched to disjunction state eventually, so as to realize the zero of electric heater
Fiery power-down protection.Wherein, the first preset voltage value Ulnd1 scope can be in below 160V, by zero fiery power-fail detection circuit
1100 detect that power down voltage Ulnd starts to complete to divide to three-pole gang operated switch 110 less than or equal to the first preset voltage value Ulnd1
Time needed for disconnected action is smaller than being equal to 0.5s.
In a specific embodiment of the present utility model, overtemperature detection circuit 1110 detects zero line N, live wire L, ground wire E
The temperature T of each pole pin, if temperature T is more than or equal to preset temperature value T1, exportable overtemperature signal to trip circuit 140, and
5th dropout instruction is sent by trip circuit 140, to drive the execution of tripping mechanism 150 to act and then make three-pole gang operated switch 110
Disjunction state is switched to by connection, final zero line N, live wire L and the ground wire E tri- for causing electric heater is extremely fast switched to disjunction shape
State, to realize the overheat protection function of electric heater.Wherein, preset temperature value T1 scope can be examined below 180 DEG C by overtemperature
Degree of the detecting T of slowdown monitoring circuit 1110 starts to three-pole gang operated switch 110 to complete needed for disjunction action more than or equal to preset temperature value T1
Time be smaller than being equal to 3min.
In a specific embodiment of the present utility model, when upper electric triggers circuit 1130 detect zero line N and live wire L it
Between have unexpected moment of starting from scratch when reaching the power up of normal working voltage, if to be more than or equal to second pre- by upper piezoelectric voltage Uln
If magnitude of voltage Uln1, then exportable electric trigger signal gives upper electric actuating circuit 160, then on this electric trigger signal by upper electronic
Making circuit 160, electric actuating mechanism 170 sends electric action command on second upwards, and then upper electric actuating circuit 160 can drive electricity
The execution of actuating mechanism 170 acts and then connects three-pole gang operated switch 110, final zero line N, the live wire L for causing electric heater and
Ground wire E tri- is extremely fast switched on state, and function is electrically connected on zero fire of electric heater to realize.Wherein, the second default electricity
Pressure value Uln1 scope it is pre- can to detect that upper piezoelectric voltage Uln is more than or equal to second in more than 110V by upper electric triggers circuit 1130
If magnitude of voltage Uln1 starts to the time that three-pole gang operated switch 110 is completed needed for ON Action to be smaller than being equal to 0.5s.
It should be noted that in one embodiment of the present utility model, as shown in figure 3, three-pole gang operated switch 110, water
Actuating circuit 130, trip circuit 140, tripping mechanism 150, upper electric actuating circuit 160, upper electric actuating mechanism 170, first is flowed to examine
Survey unit 180, the second detection unit 190, zero fiery power-fail detection circuit 1100, overtemperature detection circuit 1110, the first drive amplification
Circuit 1120 and upper electric triggers circuit 1130 can corresponding power line 200 set, power line 200 may also include mains cord 220
With connector 230, wherein, mains cord 220 can be used for connection protection device 100 and connector 230, connector 230 can be used for
Connect mains cord 220 and thermal circuit beraker 310.
Corresponding above-described embodiment, the utility model also propose a kind of electric heater.
The electric heater of the utility model embodiment, include the guarantor of the electric heater of the utility model above-described embodiment proposition
Protection unit, its specific embodiment can refer to above-described embodiment, to avoid redundancy, will not be repeated here.
, being capable of effective guarantee Electrical Safety according to the electric heater of the utility model embodiment.
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, it is for only for ease of description the utility model and simplifies description, rather than indicates 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 instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed 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 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 directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be 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 and be 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 specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.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 different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
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 the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (10)
1. a kind of protection device of electric heater, it is characterised in that the electric heater includes power line and body, the power supply
Line includes three pole pins, and three pole pin is attached with grafting form and external power receptacle, and 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；
Current detection module, the current detection module are used to detect the water inlet of the electric heater body or the water of delivery port
Flow signal with judge the electric heater whether water outlet；
Current actuating circuit, the current actuating circuit are connected with the current detection module, and the current actuating circuit is in institute
State current detection module and judge the dropout of generation first instruction during the electric heater water outlet；
Trip circuit, the trip circuit are connected with the current actuating circuit, and the trip circuit is used to receive described first
Thread off and instruct；
Tripping mechanism, the tripping mechanism are connected with the three-pole gang operated switch and the trip circuit respectively, the dropout machine
Structure is used to performing described first and threaded off instruction, with by control the three-pole gang operated switch control the zero line, the live wire and
The ground wire is in disjunction state.
2. the protection device of electric heater according to claim 1, it is characterised in that the current detection module includes：
Water flow sensing unit component, the water flow sensing unit component are arranged on the water inlet or delivery port of the electric heater body,
To generate the water flow signal according to the water-carrying capacity of the water inlet or the delivery port；
Current arithmetic processing circuit, the current arithmetic processing circuit are connected with the water flow sensing unit component, the current fortune
Calculate process circuit be used for according to the water flow signal judge the electric heater whether water outlet.
3. the protection device of electric heater according to claim 2, it is characterised in that the current arithmetic processing circuit bag
Power subsystem, timing unit, computing judging unit and interface unit are included, wherein,
The power subsystem passes with the timing unit, the computing judging unit, the interface unit and the current respectively
Sensor component, which is connected, thinks the timing unit, the computing judging unit, the interface unit and the water flow sensing unit group
Part is powered；
The computing judging unit is connected with the water flow sensing unit component and the timing unit respectively, and the computing judges single
Member judges the electric heater water outlet when judging that water-carrying capacity is more than the first preset flow according to the water flow signal, and in root
Judge that the electric heater stops water outlet when judging that water-carrying capacity is less than the second preset flow according to the water flow signal, and in institute
State and timing is started to obtain continuously stopping water discharging time by the timing unit when electric heater stops water outlet, wherein, it is described
Computing judging unit generates water outlet cut-offing instruction in the electric heater water outlet, and stops water outlet and company in the electric heater
It is continuous to stop generation stopping water outlet reset instruction when water discharging time reaches the first preset time, wherein, first preset flow is big
In second preset flow；
The interface unit is connected with the computing judging unit and the current actuating circuit respectively, so that the computing judges
The water outlet cut-offing instruction is sent to the current actuating circuit by unit by the interface unit, so that the current act
Circuit is threaded off according to water outlet cut-offing instruction generation described first and instructed.
4. the protection device of electric heater according to claim 3, it is characterised in that the computing judging unit also passes through
The stopping water outlet reset instruction is sent to the current actuating circuit by the interface unit, so as to the current actuating circuit
Also included according to electric action command, the protection device in the stopping water outlet reset instruction generation first：
Upper electric actuating circuit, the upper electric actuating circuit are connected with the current actuating circuit, and the upper electric actuating circuit is used for
Receive electric action command on described first；
Upper electric actuating mechanism, the upper electric actuating mechanism are connected with the upper electric actuating circuit, and the upper electric actuating mechanism is used for
Electric action command on described first is performed, with by controlling the three-pole gang operated switch to control zero line, the live wire and the institute
State ground wire and be in on-state.
5. the protection device of electric heater according to claim 1, it is characterised in that also include：
First detection unit, first detection unit corresponds to the zero line and the live wire is set, first detection unit
For detecting the electric leakage signal of the zero line or the live wire；
Second detection unit, second detection unit correspond to the ground wire and set, and second detection unit is used to detect institute
State the charged signal of ground wire；
Zero fiery power-fail detection circuit, the zero fiery power-fail detection circuit are used to detect the power down between the zero line and the live wire
Signal；
Overtemperature detects circuit, and the overtemperature detection circuit is used for the temperature signal for detecting three pole pin,
Wherein, the trip circuit respectively with first detection unit, second detection unit, the zero fiery detection of power loss
Circuit is connected with overtemperature detection circuit, and the trip circuit is judging the zero line or the fire according to the electric leakage signal
Generation second, which is threaded off, when line leaks electricity instructs, the 3rd dropout is generated when judging the ground wire electrification according to the charged signal
Instruction, according to the power-off signal judge between the zero line and the live wire occur power down when generation the 4th thread off instruct,
When judging the three pole pin overtemperature according to the temperature signal, generation the 5th, which is threaded off, instructs, and the tripping mechanism is used to perform
Described second, which threads off, instructs, the 3rd dropout instructs, the 4th dropout instruction or the 5th dropout instruct, with by controlling the three pole connection
Dynamic switch controls zero line, the live wire and the ground wire to be in disjunction state.
6. the protection device of electric heater according to claim 5, it is characterised in that also include：
First drive amplification circuit, the first drive amplification circuit detect with first detection unit, described second respectively
Unit is connected with the trip circuit, and the first drive amplification circuit is by the way that the electric leakage signal or the charged signal are entered
Row amplification, and the electric leakage signal after amplification or the charged signal are sent to the trip circuit.
7. the protection device of the electric heater according to claim 5 or 6, it is characterised in that
The zero line or the leakage current value of the live wire that the trip circuit detects in first detection unit are more than
During equal to the first pre-set current value, judge that the zero line or the live wire leak electricity；
The current value for the ground wire that the trip circuit detects in second detection unit is more than or equal to the second default electricity
During flow valuve, the ground wire electrification is judged；
Power down electricity of the trip circuit between the zero line and the live wire that described zero fiery power-fail detection circuit detects
When pressure is less than or equal to the first preset voltage value, judge power down occurs between the zero line and the live wire；
The temperature for three pole pin that the trip circuit arrives in overtemperature detection electric circuit inspection is more than or equal to preset temperature
During value, the three pole pin overtemperature is judged.
8. the protection device of electric heater according to claim 4, it is characterised in that also include：
Upper electric triggers circuit, the upper electric triggers circuit are 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,
Wherein, electronic work refers in generation second when the upper electric actuating circuit is used between the zero line and the live wire electric
Order, the upper electric actuating mechanism is used to perform electric action command on described second, with by controlling the three-pole gang operated switch control
Make the zero line, the live wire and the ground wire and be in on-state.
9. the protection device of electric heater according to claim 8, it is characterised in that the upper electric triggers circuit is detecting
To the zero line and the live wire between upper piezoelectric voltage be more than or equal to the second preset voltage value when, judge the zero line and institute
State upper electricity between live wire.
10. a kind of electric heater, it is characterised in that include the guarantor of the electric heater according to any one of claim 1-9
Protection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613871.XU CN206831846U (en) | 2017-05-27 | 2017-05-27 | Electric heater and its protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613871.XU CN206831846U (en) | 2017-05-27 | 2017-05-27 | Electric heater and its protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206831846U true CN206831846U (en) | 2018-01-02 |
Family
ID=60773702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720613871.XU Active CN206831846U (en) | 2017-05-27 | 2017-05-27 | Electric heater and its protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206831846U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084535A (en) * | 2017-05-27 | 2017-08-22 | 芜湖美的厨卫电器制造有限公司 | Electric heater and its protection device |
| CN111486599A (en) * | 2020-03-20 | 2020-08-04 | 广东万家乐燃气具有限公司 | Electric water heater electric leakage detection system and electric water heater |
-
2017
- 2017-05-27 CN CN201720613871.XU patent/CN206831846U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084535A (en) * | 2017-05-27 | 2017-08-22 | 芜湖美的厨卫电器制造有限公司 | Electric heater and its protection device |
| CN111486599A (en) * | 2020-03-20 | 2020-08-04 | 广东万家乐燃气具有限公司 | Electric water heater electric leakage detection system and electric water heater |
| CN111486599B (en) * | 2020-03-20 | 2021-05-14 | 广东万家乐燃气具有限公司 | Electric water heater electric leakage detection system and electric water heater |
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Effective date of registration: 20230322 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. |
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