CN108933427A - Electric heater and its protective device - Google Patents
Electric heater and its protective device Download PDFInfo
- Publication number
- CN108933427A CN108933427A CN201710393715.1A CN201710393715A CN108933427A CN 108933427 A CN108933427 A CN 108933427A CN 201710393715 A CN201710393715 A CN 201710393715A CN 108933427 A CN108933427 A CN 108933427A
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- China
- Prior art keywords
- circuit
- voltage
- firewire
- ground wire
- control chip
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/14—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to occurrence of voltage on parts normally at earth potential
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Resistance Heating (AREA)
- Breakers (AREA)
Abstract
The invention discloses a kind of electric heater and its protective device, which includes：Three-pole gang operated switch；Fiery ground voltage detection circuit；Part-loading goods detection circuit；The Master control chip being connected respectively with fiery ground voltage detection circuit and part-loading goods detection circuit, it is whether abnormal for judging the voltage between firewire and ground wire, and judge between zero curve and ground wire with the presence or absence of voltage；The first detection unit of corresponding ground wire setting；The electric leakage control chip being connected respectively with Master control chip and first detection unit; for judging ground wire with the presence or absence of electric current; wherein; electric leakage control chip be also used to the electric voltage exception between firewire and ground wire and ground wire there are voltages when electric current or between firewire and ground wire between normal, zero curve and ground wire there are voltage and ground wire there are earth wire charged protecting instruction is generated when electric current；Trip circuit and tripping mechanism are in disjunction state for instructing control three-pole gang operated switch according to earth wire charged protecting to control zero curve, firewire and ground wire.
Description
Technical field
The present invention relates to field of home appliance technology, in particular to the protective device and a kind of electric hot water of a kind of electric heater
Device.
Background technique
Electric heater has many advantages, such as energy conservation and environmental protection, easy to use, and the Electrical Safety of electric heater is electric heater always
Manufacture and design and the focal issue in use process.
Current some electric heaters have the function of earth wire charged protecting, but it is easy for the detection of ground wire electrification at present by
The influence of interference electric current signal, therefore error protection action is often generated, influence the normal use of electric heater, it is therefore necessary to this
It makes and targetedly improving.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of protective device of electric heater, can be effectively prevented and accidentally protect, guarantee electric heater just
It is often used.
Second object of the present invention is to propose a kind of electric heater.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of protective device of electric heater, wherein
The electric heater includes power supply line and ontology, and the ontology includes thermal circuit beraker, controller, heater and liner, the electricity
Source line includes three pole pins, and three pole pin is attached with grafting form and external power receptacle, the protective device packet
It includes：Three-pole gang operated switch, the three-pole gang operated switch be connected with three pole pin with connect and disjunction access power supply zero curve,
Firewire and ground wire；Fiery ground voltage detection circuit, the fire ground voltage detection circuit for detect the firewire and the ground wire it
Between fiery ground voltage signal；Part-loading goods detection circuit, the part-loading goods detection circuit is for detecting the zero curve and described
Part-loading goods signal between ground wire；Master control chip, the Master control chip respectively with the fiery ground voltage detection circuit and
The part-loading goods detection circuit is connected, the Master control chip be used to judge according to the fiery ground voltage signal firewire with
Whether voltage between the ground wire abnormal, and judged according to the part-loading goods signal be between the zero curve and the ground wire
It is no that there are voltages；First detection unit, the first detection unit correspond to the ground wire setting, and the first detection unit is used for
Detect the current signal of the ground wire；Electric leakage control chip, the electric leakage control chip respectively with the Master control chip and institute
It states first detection unit to be connected, the electric leakage control chip is used to whether judge the ground wire according to the current signal of the ground wire
There are electric currents, wherein the electric leakage control chip is for the electric voltage exception between the firewire and the ground wire and described
There are voltages when electric current or between the firewire and the ground wire to exist between normal, the described zero curve and the ground wire for line
There are earth wire charged protecting instruction is generated when electric current for voltage and the ground wire；Trip circuit, the trip circuit and the electric leakage
It controls chip to be connected, the trip circuit is instructed for receiving the earth wire charged protecting, and according to the earth wire charged protecting
Instruction generates tripping instruction；Tripping mechanism, the tripping mechanism respectively with the three-pole gang operated switch and the trip circuit phase
Even, the tripping mechanism is for receiving and executing the tripping instruction, by controlling described in the three-pole gang operated switch control
Zero curve, the firewire and the ground wire are in disjunction state.
The protective device of electric heater according to an embodiment of the present invention detects firewire and ground by fiery ground voltage detection circuit
Fiery ground voltage signal between line, and the part-loading goods signal between zero curve and ground wire is detected by part-loading goods detection circuit,
And geodesic current signal is examined by first detection unit, then pass through the logic of Master control chip and electric leakage control chip
Judgement, determines whether to carry out ground wire electrification in conjunction with the current signal of above-mentioned fiery ground voltage signal, part-loading goods signal and ground wire
Protection, and disjunction state is in realize earth wire charged protecting by zero curve, firewire and the ground wire of control electric heater power supply,
The safety and reliability of ground wire protection is not only improved by cutting off three pole power supplys as a result, additionally it is possible to be effectively prevented and accidentally protect
Shield, guarantees the normal use of electric heater.
In addition, the protective device of the electric heater proposed according to that above embodiment of the present invention can also have it is following additional
Technical characteristic：
Further, the protective device of the electric heater further includes：Zero fiery power-fail detection circuit, described zero fiery power down
Detection circuit is used to detect the power-off signal between the zero curve and the firewire；Zero fiery voltage detecting circuit, zero thermoelectricity
Pressure detection circuit is used to detect zero ignition voltage signal between the zero curve and the firewire；Over temperature detection circuit, the overtemperature
Detection circuit is used to detect the temperature signal of three pole pin, wherein the control chip is examined with described zero fiery power down respectively
Slowdown monitoring circuit, the zero fiery voltage detecting circuit are connected with the over temperature detection circuit, and the control chip according to for falling
Electric signal judges power down whether occurs between the zero curve and the firewire, and falls between the zero curve and the firewire
Power down protection instruction is generated when electric, and whether the voltage between the zero curve and the firewire is judged according to zero ignition voltage signal
Over-voltage is under-voltage, and electric voltage over press between the zero curve and the firewire or it is under-voltage when generate overvoltage protection instruction or under-voltage
Protection instruction, and according to the temperature signal judge three pole pin whether overtemperature, and in the three pole pin overtemperature
Generation overtemperature prote instruction, the trip circuit is instructed for receiving the power down protection, the overvoltage protection instructs, described deficient
Protection instruction or overtemperature prote instruction are pressed, and is instructed according to power down protection instruction, the overvoltage protection, is described under-voltage
Protection instruction or overtemperature prote instruction generate the tripping instruction.
Further, the protective device of the electric heater further includes：Second detection unit, the second detection unit
The corresponding zero curve and firewire setting, and the second detection unit is connected with electric leakage control chip, described second
Detection unit is used to detect the electric leakage signal of the zero curve or the firewire, wherein the electric leakage control chip is according to
Electric leakage signal judges that earth leakage protective is generated when the zero curve or the firewire leak electricity to be instructed, and the trip circuit is for receiving
The earth leakage protective instruction, and the tripping is generated according to earth leakage protective instruction and is instructed.
Further, the protective device of the electric heater further includes power circuit, and the power circuit includes：Rectification
Unit, the rectification unit correspond to the zero curve and firewire setting, and the rectification unit is used for the zero curve and described
The alternating current of firewire input is converted into the first direct current；Pressure unit, the pressure unit be used for first direct current into
Row decompression is to obtain the second direct current；Voltage regulation unit, the voltage regulation unit are used to carry out pressure stabilizing to second direct current.
Wherein, described zero fiery voltage detecting circuit and the zero fiery power-fail detection circuit correspond to the rectification unit setting.
Further, the trip circuit includes：Tripping coil, one end of the tripping coil and the power circuit
Direct-flow positive pole end is connected；First is silicon-controlled, and the described first silicon-controlled anode tap is connected with the other end of the tripping coil, institute
It states the first silicon-controlled cathode terminal to be connected with the direct current negative pole end of the power circuit, the described first silicon-controlled control terminal difference
It is connected with the Master control chip and electric leakage control chip；Second is silicon-controlled, the described second silicon-controlled cathode terminal and institute
The one end for stating tripping coil is connected, and the described second silicon-controlled control terminal is controlled with the Master control chip and the electric leakage respectively
Chip is connected；Rectifier diode, the anode tap of the rectifier diode are connected with one end of the tripping coil, the rectification two
The cathode terminal of pole pipe is connected with the described second silicon-controlled anode tap；Charge and discharge capacitance, one end of the charge and discharge capacitance and institute
The direct current negative pole end for stating power circuit is connected, the other end of the charge and discharge capacitance and the described second silicon-controlled anode tap phase
Even.
Wherein, the control chip obtains power-on reset signal by the power circuit, and according to the electrification reset
Signal generates electrification reset instruction, and the protective device further includes：Actuating circuit is powered on, it is described to power on actuating circuit and the control
Coremaking piece is connected, and the actuating circuit that powers on is instructed according to the electrification reset and given birth to for receiving the electrification reset instruction
At powering on action command；Actuating mechanism is powered on, the actuating mechanism that powers on is connected with the actuating circuit that powers on, described electronic
Make mechanism for receive and execute it is described power on action command, with by control the three-pole gang operated switch control the zero curve,
The firewire and the ground wire are in on-state.
Further, the protective device of the electric heater further includes：Reset circuit, the reset circuit and the master
It controls chip to be connected, the Master control chip, which is used to generate manual reset according to the manual reset operation to the reset circuit, to be referred to
It enables, the actuating circuit that powers on generates on described for receiving the manual reset instruction, and according to manual reset instruction
Electric action command.
Further, the protective device of the electric heater further includes：Zero fiery leak(age) test circuit, the zero fire electric leakage
Hookup corresponds to the zero curve and firewire setting, and is connected with the second detection unit, and the electric leakage controls chip
The earth leakage protective is generated also according to the man-made chamber operation to described zero fiery leak(age) test circuit to instruct.
Further, the protective device of the electric heater further includes instruction and warning circuit, the instruction and alarm
Circuit includes：Power supply instruction unit, the power supply instruction unit are connected with the Master control chip, and the power supply instruction unit is used
In the sending energization prompt information when the Master control chip judges that power down does not occur between the zero curve and the firewire；Alarm
Unit, the alarm unit are connected with the Master control chip, and the alarm unit is used to generate in electric leakage control chip
The earth wire charged protecting issues prompt messages when instructing.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of electric heater comprising the present invention the
The protective device for the electric heater that one side embodiment proposes.
Electric heater according to an embodiment of the present invention can be effectively prevented and accidentally protect, and guarantee normal use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the electric heater of one embodiment of the invention；
Fig. 2 is the electrical schematic diagram according to the electric heater of one embodiment of the invention；
Fig. 3 is the structural schematic diagram according to the electric heater including protective device of one embodiment of the invention；
Fig. 4 is the structural schematic diagram according to the controller of one embodiment of the invention；
Fig. 5 is the circuit diagram according to the trip circuit of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The electric heater and its protective device of the embodiment of the present invention described with reference to the accompanying drawing.
As shown in Figure 1, the electric heater of the embodiment of the present invention may be used also in addition to including 100 (not shown in figure 1) of protective device
Including power supply line 200 and ontology 300, as depicted in figs. 1 and 2, ontology 300 may include thermal circuit beraker 310, controller 320, heating
Device 330 and liner 340, power supply line 200 may include three pole pins 210, and three pole pins 210 can be inserted with grafting form and external power supply
Seat is attached.
Wherein, liner 340 is positive displacement utensil, is used for water storage, including gallbladder body, outlet pipe and water inlet pipe, and heater 330 is used
It is heated in liner water storage.Controller 320 can carry out temperature-sensitive control, and controller 320 can be controlled by the first temperature threshold to be added
Hot device 330 and external power supply turn on automatically or disconnection, and then control the water temperature of liner in the range of setting.Of the invention
In one embodiment, the first temperature threshold of controller 320 can be the temperature value lower than 85 DEG C.Thermal circuit beraker 310 be it is a kind of with
Liquid working substance or bimetallic element carry out the mechanical device of temperature-sensitive control, and thermal circuit beraker 310 can be by second temperature threshold value pair
Heater 330 carries out power-off protection, specifically can by cut off the firewire LL and zero curve NN of 330 performance loop of heater simultaneously extremely come
Prevent liner temperature excessively high, second temperature threshold value can not be changed by the user, and cannot be automatically reset after carrying out power-off protection.?
In one embodiment of the present of invention, the second temperature threshold value of thermal circuit beraker 310 can be the temperature value lower than 110 DEG C.
In one embodiment of the invention, as shown in figure 3, controller 320 may include power supply unit 321, relay list
Member 322, control relay circuit 323, microprocessor 324, temperature sensor 325, temperature sensing circuit 326 and display operation electricity
Road 327.
Wherein, power supply unit 321 may include transformer 01 and current rectifying and wave filtering circuit 02, wherein transformer 01 can for
The transformer of electrical isolation, input terminal are connected with the zero curve N of power supply, the two poles of the earth firewire L, and power supply is defeated after the decompression of transformer 01
Rectification filtering voltage stabilizing circuit 02 is arrived out.Alternating current after the decompression of transformer 01 is converted to stabilization by rectification filtering voltage stabilizing circuit 02
Direct current after, be relay unit 322, control relay circuit 323, microprocessor 324, temperature sensor 325, temperature inspection
Slowdown monitoring circuit 326 and display operation circuit 327 are powered.
Temperature sensor 325 can be a kind of component comprising thermistor, shown referring to Figures 1 and 2, temperature sensor
325 temperature sensor is mountable to be believed inside liner 340 with obtaining water storage temperature for measuring the water storage temperature in liner 340
Number, temperature sensing circuit 326 can export after processing the temperature signal that temperature sensor 325 inputs to microprocessor 324.It is micro-
Processor 324 can carry out operation and judgement to the temperature signal that temperature sensing circuit 326 inputs, and give control relay circuit 323
Export the control instruction connected or disconnected.Control relay circuit 323 can receive microprocessor 324 output control instruction to
The output of relay unit 322 is switched on or switched off control instruction, and relay unit 322 can be sent according to control relay circuit 323
Control instruction control heater performance loop power supply be in be switched on or switched off state.Display operation circuit 327 may include showing
Show that unit and operating unit, display operation circuit 327 can be used for sending artificial operational order to microprocessor 324 and can show micro-
The signal that processor 324 exports, in one embodiment of the invention, display operation circuit 327 may include touch display screen.
Fig. 4 is the structural schematic diagram according to the protective device of the electric heater of the embodiment of the present invention.
As shown in figure 4, the protective device 100 of the electric heater of the embodiment of the present invention, including three-pole gang operated switch 110, fire
Ground voltage detection circuit 120, part-loading goods detection circuit 130, Master control chip 140, first detection unit 150 (are not shown, wrap
Include 151 and 152), electric leakage control chip 160, trip circuit 170 and tripping mechanism 180.
Wherein, three-pole gang operated switch 110 is connected with zero curve N, the firewire of connection and disjunction access power supply with three pole pins 210
L and ground wire E；Fiery ground voltage detection circuit 120 is used to detect the fiery ground voltage signal between firewire L and ground wire E；Part-loading goods inspection
Slowdown monitoring circuit 130 is used to detect the part-loading goods signal between zero curve N and ground wire E；Master control chip 140 is examined with fiery ground voltage respectively
Slowdown monitoring circuit 120 is connected with part-loading goods detection circuit 130, and Master control chip 140 is used to judge firewire L according to fiery ground voltage signal
Whether the voltage between ground wire E is abnormal, and is judged between zero curve N and ground wire E according to part-loading goods signal with the presence or absence of voltage；
The corresponding ground wire E setting of first detection unit 150, first detection unit 150 are used to detect the current signal of ground wire E；Electric leakage control
Chip 160 is connected with Master control chip 140 and first detection unit 150 respectively, and electric leakage control chip 160 is used for according to ground wire E
Current signal judge ground wire E with the presence or absence of electric current, wherein electric leakage control chip 160 is used between firewire L and ground wire E
There are voltages when electric current or between firewire L and ground wire E to exist between normal, zero curve N and ground wire E by electric voltage exception and ground wire E
There are the instruction of ground wire E electrization protection is generated when electric current by voltage and ground wire E；Trip circuit 170 is connected with electric leakage control chip 160,
Trip circuit 170 instructs according to ground wire E electrization protection for receiving the instruction of ground wire E electrization protection and generates tripping instruction；Tripping
Mechanism 180 is connected with three-pole gang operated switch 110 and trip circuit 170 respectively, and tripping mechanism 180 refers to for receiving and executing tripping
It enables, is in disjunction state to control zero curve N, firewire L and ground wire E by control three-pole gang operated switch 110.
The Master control chip 140 of the embodiment of the present invention can be single-chip microcontroller, and electric leakage control chip 160 can be that can be realized its function
The IC chip of energy.As shown in figure 4, first detection unit 150 may include the first electromagnetic induction coil 151 being set on ground wire E
With ground wire E current detection circuit 152.
Wherein, Master control chip 140 can be in the electricity between the fiery firewire L detected of ground voltage detection circuit 120 and ground wire E
Pressure value is less than or equal to judge the electric voltage exception between firewire L and ground wire E when the first predeterminated voltage, and in fiery ground voltage detection circuit
Voltage value between the 120 firewire L detected and ground wire E judges between firewire L and ground wire E when being more than or equal to the second predeterminated voltage
Voltage it is normal.Master control chip 140 can voltage between the zero curve N that part-loading goods detection circuit 130 detects and ground wire E
Value is less than or equal to judge that there is no voltages between zero curve N and ground wire E when third predeterminated voltage, and in part-loading goods detection circuit
Voltage value between the 130 zero curve N detected and ground wire E judges between zero curve N and ground wire E when being more than or equal to four predeterminated voltages
There are voltages.Electric leakage control chip 160 can be more than or equal to first in the current value for the ground wire E that first detection unit 150 detects
Judge that there are electric currents by ground wire E when predetermined current.
In one particular embodiment of the present invention, as the firewire L and ground wire E that fiery ground voltage detection circuit 120 detects
Between voltage value Ule be less than or equal to the first preset voltage value Ule1 when, which can be inputed to single-chip microcontroller, single-chip microcontroller
It can carry out operation judgement and export fiery ground abnormal signal to give electric leakage control chip 160, the chip 160 of electric leakage control at this time can be by zero
Voltage detecting circuit 130 is set to invalid state by the part-loading goods signal that single-chip microcontroller inputs, i.e. part-loading goods signal is not involved in
Logic decision, as long as electric leakage control chip 160 judges that the first electromagnetic induction coil 151 and ground wire E current detection circuit 152 detect
The current value Ie of the ground wire E arrived is more than or equal to the first pre-set current value Ie1, then leaks electricity and control the output ground wire E electrification guarantor of chip 160
Finger shield is enabled to trip circuit 170, and then trip circuit 170 drives 180 execution of tripping mechanism to act immediately and then three poles is made to link
Switch 110 is switched to disjunction state by on-state, finally makes the zero curve N, firewire L and ground wire E tri- of electric heater extremely fast
It is switched to disjunction state, to realize the ground wire E electrization protection function of electric heater.Wherein, the first preset voltage value Ule1
Setting range can within 110V, the setting range of the first pre-set current value Ie1 can within 30mA, and preferred value be 15mA,
30mA。
In one particular embodiment of the present invention, as the firewire L and ground wire E that fiery ground voltage detection circuit 120 detects
Between voltage value Ule be more than or equal to the second predeterminated voltage Ule2 when, which can be inputed to single-chip microcontroller, single-chip microcontroller can
It carries out operation judgement and exports fiery ground normal signal to give electric leakage control chip 160, part-loading goods signal is also determined at this time, if zero ground
Voltage value Une between voltage detecting circuit 130 the zero curve N detected and ground wire E is less than or equal to third predeterminated voltage Une1, then
The voltage signal can be inputed to single-chip microcontroller, single-chip microcontroller can carry out operation judgement and export zero ground without electricity judgement signal to control of leaking electricity
Coremaking piece 160, electric leakage controls chip 160 for the first electromagnetic induction coil 151 and ground wire E current detection circuit 152 under this state
The ground wire E current signal of input is set to invalid state, i.e. ground wire E current signal is not involved in logic decision, electric leakage control chip 160
The instruction of ground wire E electrization protection is not exported, and trip circuit 170 does not export tripping instruction, can prevent from doing ground wire E because of environment in this way
It disturbs and error protection action occurs.Wherein, the setting range of the second predeterminated voltage Ule2 can be in 110V or more.
In one particular embodiment of the present invention, as the firewire L and ground wire E that fiery ground voltage detection circuit 120 detects
Between voltage value Ule be more than or equal to the second predeterminated voltage Ule2 when, which can be inputed to single-chip microcontroller, single-chip microcontroller can
It carries out operation judgement and exports fiery ground normal signal to give electric leakage control chip 160, part-loading goods signal is also determined at this time, if zero ground
Voltage value Une between voltage detecting circuit 130 the zero curve N detected and ground wire E is more than or equal to the 4th predeterminated voltage Une2, then
The voltage signal can be inputed to single-chip microcontroller, single-chip microcontroller carries out operation judgement and exports zero ground electrification judgement signal to control of leaking electricity
Then chip 160 judges the ground wire E electric current letter that the first electromagnetic induction coil 151 and ground wire E current detection circuit 152 input again
Number, if the current value Ie for the ground wire E that the first electromagnetic induction coil 151 and ground wire E current detection circuit 152 detect is more than or equal to
First pre-set current value Ie1, then leaking electricity to control chip 160 and export ground wire E electrization protection instructs to trip circuit 170, to then
Trip circuit 170 drives 180 execution of tripping mechanism to act immediately and then is switched to three-pole gang operated switch 110 point by on-state
Disconnected state, finally makes the zero curve N, firewire L and ground wire E tri- of electric heater extremely fast be switched to disjunction state, to realize electricity
The ground wire E electrization protection function of water heater.
The protective device of electric heater according to an embodiment of the present invention detects firewire and ground by fiery ground voltage detection circuit
Fiery ground voltage signal between line, and the part-loading goods signal between zero curve and ground wire is detected by part-loading goods detection circuit,
And geodesic current signal is examined by first detection unit, then pass through the logic of Master control chip and electric leakage control chip
Judgement, determines whether to carry out ground wire electrification in conjunction with the current signal of above-mentioned fiery ground voltage signal, part-loading goods signal and ground wire
Protection, and disjunction state is in realize earth wire charged protecting by zero curve, firewire and the ground wire of control electric heater power supply,
The safety and reliability of ground wire protection is not only improved by cutting off three pole power supplys as a result, additionally it is possible to be effectively prevented and accidentally protect
Shield, guarantees the normal use of electric heater.
The electric heater of the embodiment of the present invention can not only have the above-mentioned ground wire E electrization protection function that can prevent from accidentally protecting
Can, can also have zero fiery power-down protection, over-voltage protecting function, under-voltage protection function, overheat protection function, zero fire electric leakage to protect
Protective function and power on turn-on power loss etc..
As shown in figure 4, the protective device 100 of the electric heater of the embodiment of the present invention may also include zero fiery power-fail detection circuit
190, zero fiery voltage detecting circuit 1100, over temperature detection circuit 1110, second detection unit 1120 (are not shown, including 1121 Hes
1122), power circuit 1130, power on actuating circuit 1140 and power on actuating mechanism 1150.
In one embodiment of the invention, zero fiery power-fail detection circuit 190 is for detecting between zero curve N and firewire L
Power-off signal；Zero fiery voltage detecting circuit 1100 is used to detect zero ignition voltage signal between zero curve N and firewire L；Overtemperature detection
Circuit 1110 is used to detect the temperature signal of three pole pins.Wherein, control chip respectively with zero fiery power-fail detection circuit 190, zero
Fiery voltage detecting circuit 1100 is connected with over temperature detection circuit 1110, control chip be used for according to power-off signal judge zero curve N with
Power down whether occurs between firewire L, and generates power down protection instruction when generation power down between zero curve N and firewire L, according to zero fire
Voltage signal judge the voltage between zero curve N and firewire L whether over-voltage or under-voltage, and the voltage mistake between zero curve N and firewire L
Overvoltage protection instruction or under-voltage protection instruction are generated when pressing or is under-voltage, and judge whether three pole pins surpass according to temperature signal
Temperature, and overtemperature prote instruction is generated in three pole pin overtemperatures, trip circuit 170 is for receiving power down protection instruction, over-voltage guarantor
Finger shield enables, under-voltage protection instruction or overtemperature prote instruct, and is referred to according to power down protection instruction, overvoltage protection instruction, under-voltage protection
It enables or overtemperature prote instruction generates tripping instruction.
Wherein, the alternating current of Master control chip 140 can be detected in zero fiery power-fail detection circuit 190 zero curve N and firewire L
Waveform when being more than or equal to the first preset time without waveform time judges that power down occurs between zero curve N and firewire L, and in zero thermoelectricity
Pressure detection circuit 1100 the zero curve N detected and firewire L between voltage be more than or equal to five predeterminated voltages when judge zero curve N with
Electric voltage over press between firewire L, and the voltage between zero fiery voltage detecting circuit 1100 the zero curve N detected and firewire L
The under-voltage between zero curve N and firewire L is judged when less than or equal to six predeterminated voltages, and is detected in over temperature detection circuit 1110
When the temperature of the three pole pins arrived is more than or equal to the first preset temperature value, three pole pin overtemperatures are judged.
In one particular embodiment of the present invention, zero fiery power-fail detection circuit 190 can will be after zero fiery alternating voltage processing
It inputs to single-chip microcontroller to carry out operation and determine whether normal ac power waveform, if continuously without waveform time, that is, power down time Tln
More than or equal to the first preset time T ln1, then single-chip microcontroller output power down protection is instructed to trip circuit 170, and trip circuit 170 can
Generate tripping instruction, then trip circuit 170 drive 180 execution movement of tripping mechanism immediately so that three-pole gang operated switch 110 by
Connection is switched to disjunction state, and the zero curve N, firewire L and ground wire E tri- of electric heater is finally made extremely fast to be switched to disjunction shape
State, to realize zero fiery power-down protection of electric heater.Wherein, the value range of the first preset time T of setting value ln1
It can detect that power down time Tln is more than or equal to after the first preset time T ln1 extremely by zero fiery power-fail detection circuit 190 within 5s
Time needed for three-pole gang operated switch 110110 completes disjunction movement is smaller than equal to 0.5s.
By zero fiery power-down protection, can not only be protected when electric heater power supply is normal, and in electric hot water
There is zero curve N, firewire L and the ground wire E that can also automatically cut off the power after zero fiery power down in device power supply, so that it is guaranteed that electric heater is always
In security isolation state, the safety of electric heater is further improved.
In one particular embodiment of the present invention, the zero ignition voltage signal input that zero fiery voltage detecting circuit 1100 exports
Operation judgement is carried out to single-chip microcontroller, it is single if the voltage Uln between zero curve N and firewire L is less than or equal to the 6th predeterminated voltage Umin
The output under-voltage protection of piece machine, which is instructed, is more than or equal to the to the voltage Uln between trip circuit 170150 or zero curve N and firewire L
Five predeterminated voltage Umax, then single-chip microcontroller output over-voltage protection is instructed to trip circuit 170150, and then trip circuit 170150 is vertical
That is driving 180160 execution movement of tripping mechanism is so that three-pole gang operated switch 110110 is switched to disjunction state by on-state, most
The zero curve N, firewire L and ground wire E tri- of electric heater is made extremely fast to be switched to disjunction state eventually, to realize owing for electric heater
Press defencive function or over-voltage protecting function.Wherein, the setting range of the 6th predeterminated voltage Umin can be 100-180V, and the 5th is default
Voltage Umax is greater than the 6th predeterminated voltage Umin, and setting range can be 280-350V.
In one particular embodiment of the present invention, it is each to can detect zero curve N, firewire L, ground wire E for over temperature detection circuit 1110
The temperature signal of pole pin is exported to single-chip microcontroller, if temperature T is more than or equal to the first preset temperature T1, monolithic after calculation process
Machine output overtemperature prote is instructed to trip circuit 170, and trip circuit 170 produces tripping instruction, and then trip circuit 170 is immediately
It drives 180 execution movement of tripping mechanism so that three-pole gang operated switch 110 is switched to disjunction state by connection, finally makes electric hot water
Zero curve N, firewire L and the ground wire E tri- of device are extremely fast switched to disjunction state, to realize the overheat protection function of electric heater.
Wherein, the range of the first preset temperature T1 can detect that temperature T is more than or equal to by over temperature detection circuit 1110 within 180 DEG C
Time needed for completing disjunction movement to three-pole gang operated switch 110 after first preset temperature T1 is smaller than equal to 3min.
In one embodiment of the invention, second detection unit 1120 can correspond to zero curve N and firewire L setting, and second
Detection unit 1120 is connected with electric leakage control chip 160, and second detection unit 1120 is used to detect the electric leakage of zero curve N or firewire L
Signal.Wherein, electric leakage control chip 160 generates earth leakage protective when judging that zero curve N or firewire L leak electricity according to electric leakage signal
Instruction, trip circuit 170 instruct according to earth leakage protective for receiving earth leakage protective instruction and generate tripping instruction.Second detection
Unit 1120 may include the second electromagnetic induction coil 1121 and zero fiery electric-leakage detection circuit 1122
Wherein, electric leakage control chip 160 can be in the electric leakage electricity for the zero curve N or firewire L that second detection unit 1120 detects
Flow valuve judges that zero curve N or firewire L leak electricity when being more than or equal to the second predetermined current.
In one particular embodiment of the present invention, the second electromagnetic induction coil 1121 and zero fiery electric-leakage detection circuit 1122
The fiery electric leakage signal of the zero of output inputs to electric leakage control chip 160 and carries out operation judgement, if the leakage current of zero curve N or firewire L
Value Iln be more than or equal to the second predetermined current Iln1, then leak electricity control chip 160 export earth leakage protective instruct to trip circuit 170,
Then trip circuit 170 drives tripping mechanism 180 to execute trip action immediately and then acts three-pole gang operated switch 110, finally
So that the zero curve N of electric heater, firewire L and tri- pole ground wire E are switched fast by on-state as disjunction state, to realize electric heating
The fiery creepage protection function of the zero of hydrophone.Wherein, the setting range of the second predetermined current Iln1 can be within 30mA, and preferred value is
5mA, 6mA, 10mA, 15mA detect that the leakage current value Iln of zero curve N or firewire L are greater than by the first electromagnetic induction coil 1121
It is smaller than equal to the time needed for completing disconnection movement to three-pole gang operated switch 110 after the second predetermined current Iln1 equal to 0.1s.
As shown in figure 4, power circuit 1130 may include rectification unit 1131, pressure unit 1132 and voltage regulation unit 1133.
Wherein, the whole wave of half-wave or full-wave rectification can be used in the corresponding zero curve N and firewire L setting of rectification unit 1131, rectification unit 1131
Circuit structure, for the alternating current of zero curve N and firewire L input to be converted into the first direct current.Pressure unit 1132 and rectification are single
Member 1131 is connected, and resistance-capacitance type reduction voltage circuit structure can be used in pressure unit 1132, for being depressured the first direct current to obtain
To the second direct current.Voltage regulation unit 1133 is connected with pressure unit 1132, and 7805 three-terminal voltage-stabilizing collection can be used in voltage regulation unit 1133
At circuit plus the circuit structure of filter capacitor, for carrying out pressure stabilizing to the second direct current.
Wherein, zero above-mentioned fiery voltage detecting circuit 1100 and zero fiery power-fail detection circuit 190 can correspond to rectification unit
1131 settings.
In one embodiment of the invention, control chip can obtain power-on reset signal by power circuit 1130, and
Electrification reset instruction is generated according to power-on reset signal.It powers on actuating circuit 1140 to be connected with control chip, powers on actuating circuit
1140 for receiving electrification reset instruction, and is generated according to electrification reset instruction and power on action command；Power on actuating mechanism 1150
It is connected with actuating circuit 1140 is powered on, powers on actuating mechanism 1150 for receiving and executing and power on action command, passes through control
Three-pole gang operated switch 110 controls zero curve N, firewire L and ground wire E and is in on-state.
In one particular embodiment of the present invention, single-chip microcontroller is powered in the power circuit 1130 that automatic identification supplies power for
When, exportable power-on reset signal to being powered on actuating circuit 1140, the power-on reset signal through powering on actuating circuit 1140 to
It powers on the sending of actuating mechanism 1150 and powers on action command, then power on actuating circuit 1140 and drive immediately and power on actuating mechanism 1150
Execution movement finally makes the zero curve N, firewire L and ground wire E tri- of electric heater extremely fast so that the connection of three-pole gang operated switch 110
It is switched on state, so that realizes electric heater powers on turn-on power loss.Wherein, to three poles after being powered on by power circuit 1130
Time needed for linked switch 110 completes ON Action is smaller than equal to 0.5s.
In addition, as shown in figure 4, the protective device 100 of the electric heater of the embodiment of the present invention may also include reset circuit
1160, zero fiery leak(age) test circuit 1170, instruction and warning circuit 1180 and Function Extension interface 1190.
Wherein, reset circuit 1160 is connected with Master control chip 140, and Master control chip 140 is used for according to reset circuit
1160 manual reset operation generates manual reset instruction, powers on actuating circuit 1140 for receiving artificial reset instruction, and root
It is generated according to manual reset instruction and powers on action command, and export and power on action command to powering on actuating mechanism 1150, so that on
Electric actuating mechanism 1150 is in on-state with by the control control of three-pole gang operated switch 110 zero curve N, firewire L and ground wire E.
The zero corresponding zero curve N and firewire L setting of fiery leak(age) test circuit 1170, and be connected with second detection unit 1120, zero
Fiery leak(age) test circuit 1170 may include test key, carry out man-made chamber operation by triggering test key.Electric leakage control chip 160
Earth leakage protective instruction is generated also according to the man-made chamber operation to zero fiery leak(age) test circuit 1170.By artificial leak(age) test,
Whether the protective device 100 of the embodiment of the present invention can be examined can effectively work.
Instruction and warning circuit 1180 may include power supply instruction unit and alarm unit.Power supply instruction unit and master control coremaking
Piece 140 is connected, and power supply instruction unit is used for the sending when Master control chip 140 judges that power down does not occur between zero curve N and firewire L
Energization prompt information；Alarm unit is connected with Master control chip 140, and alarm unit is used to generate ground in electric leakage control chip 160
Line E electrization protection issues prompt messages when instructing, to indicate that electric heater is in the hole.
Function Extension interface 1190 is used to access the other function module of subsequent development, to realize that the function of power supply line expands
Exhibition.
In one embodiment of the invention, as shown in figure 5, trip circuit 170 may include tripping coil L1, it is first controllable
Silicon SCR1, the second controllable silicon SCR 2, rectifier diode D1 and charge and discharge capacitance C1.Wherein, one end of tripping coil L1 and power supply
The direct-flow positive pole end of circuit 1130 is connected；The anode tap of first controllable silicon SCR 1 is connected with the other end of tripping coil L1, and first
The cathode terminal of controllable silicon SCR 1 is connected with the direct current negative pole end of power circuit 1130, the control terminal of the first controllable silicon SCR 1 respectively with
Master control chip 140 is connected with electric leakage control chip 160；One end phase of the cathode terminal of second controllable silicon SCR 2 and tripping coil L1
Even, the control terminal of the second controllable silicon SCR 2 is connected with Master control chip 140 and electric leakage control chip 160 respectively；Rectifier diode
The anode tap of D1 is connected with one end of tripping coil L1, the anode tap of the cathode terminal of rectifier diode D1 and the second controllable silicon SCR 2
It is connected；One end of charge and discharge capacitance C1 is connected with the direct current negative pole end of power circuit 1130, the other end of charge and discharge capacitance C1 with
The anode tap of second controllable silicon SCR 2 is connected.
Wherein, when the zero curve N of electric heater power supply and firewire L are powered on, power circuit 1130 can mention for trip circuit 170
For working power, meanwhile, power circuit 1130 can charge for charge and discharge capacitance C1.In the zero curve N and firewire L of electric heater power supply
When powering on, the control terminal of the first controllable silicon SCR 1 controls the ground wire of the transmission of chip 160 by receiving Master control chip 140 or electric leakage
The instruction of E electrization protection, power down protection instruction, overvoltage protection instruction, under-voltage protection instruction, overtemperature prote instruction and earth leakage protective refer to
Enable etc., to be connected, power circuit 1130 by providing power supply for tripping coil L1, make tripping coil L1 must it is electric after be attracted
Trip action is passed to tripping mechanism 180 by its iron core, that is to say, that trip circuit 170 can be sent out by way of pull-core
Out tripping instruction, tripping mechanism 180 by receive the trip action with disconnect zero curve N in three-pole gang operated switch 110, firewire L and
Switch corresponding to ground wire E realizes the disjunction of zero curve N, firewire L and ground wire E.And in the zero curve N and firewire L of electric heater power supply
When power loss, the second controllable silicon SCR 2 receives above-metioned instruction and is connected, and charge and discharge capacitance C1 can provide power supply for tripping coil L1,
Rectifier diode D1 can play the role of circuit isolation at this time.
It should be noted that in one embodiment of the invention, as shown in figure 4, three-pole gang operated switch 110, fire ground electricity
Press detection circuit 120, part-loading goods detection circuit 130, Master control chip 140, first detection unit 150, electric leakage control chip
160, the fiery voltage detecting circuit 1100 of the fiery power-fail detection circuit 190, zero of trip circuit 170, tripping mechanism 180, zero, overtemperature detection
Circuit 1110, power circuit 1130, powers on actuating circuit 1140, powers on actuating mechanism 1150, resets second detection unit 1120
The fiery leak(age) test circuit 1170 of circuit 1160, zero, instruction and warning circuit 1180 and Function Extension interface 1190 can correspond to electricity
Source line 200 is arranged.Power supply line 200 may also include mains cord 220 and connector 230, wherein mains cord 220 can be used for connecting
Protective device 100 and connector 230 are connect, connector 230 can be used for connecting mains cord 220 and thermal circuit beraker 310.
Corresponding above-described embodiment, the present invention also propose a kind of electric heater.
The electric heater of the embodiment of the present invention, the protective device including the electric heater that the above embodiment of the present invention proposes,
Its specific embodiment can refer to above-described embodiment, and to avoid redundancy, details are not described herein.
Electric heater according to an embodiment of the present invention can be effectively prevented and accidentally protect, and guarantee normal use.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal 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 specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (11)
1. a kind of protective device of electric heater, which is characterized in that the electric heater includes power supply line and ontology, the ontology
Including thermal circuit beraker, controller, heater and liner, the power supply line includes three pole pins, and three pole pin is with grafting shape
Formula is attached with external power receptacle, and the protective 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, firewire and ground wire；
Fiery ground voltage detection circuit, the fire ground voltage detection circuit are used to detect the fire ground between the firewire and the ground wire
Voltage signal；
Part-loading goods detection circuit, the part-loading goods detection circuit are used to detect zero ground between the zero curve and the ground wire
Voltage signal；
Master control chip, the Master control chip respectively with the fiery ground voltage detection circuit and the part-loading goods detection circuit
It is connected, the Master control chip is used to judge that the voltage between the firewire and the ground wire is according to the fiery ground voltage signal
No exception, and judged between the zero curve and the ground wire according to the part-loading goods signal with the presence or absence of voltage；
First detection unit, the first detection unit correspond to the ground wire setting, and the first detection unit is for detecting institute
State the current signal of ground wire；
Electric leakage control chip, the electric leakage control chip are connected with the Master control chip and the first detection unit respectively,
The electric leakage control chip is used to be judged the ground wire with the presence or absence of electric current according to the current signal of the ground wire, wherein described
Electric leakage control chip is for the electric voltage exception between the firewire and the ground wire and the ground wire is there are when electric current, Huo Zhesuo
It states between normal voltage between firewire and the ground wire, the zero curve and the ground wire there are voltage and the ground wire has electricity
Earth wire charged protecting instruction is generated when stream；
Trip circuit, the trip circuit are connected with electric leakage control chip, and the trip circuit is for receiving the ground wire
Electrization protection instruction, and instructed according to the earth wire charged protecting and generate tripping instruction；
Tripping mechanism, the tripping mechanism are connected with the three-pole gang operated switch and the trip circuit respectively, the tripping machine
Structure is for receiving and executing the tripping instruction, to control the zero curve, the firewire by controlling the three-pole gang operated switch
Disjunction state is in the ground wire.
2. the protective device of electric heater according to claim 1, which is characterized in that further include：
Zero fiery power-fail detection circuit, described zero fiery power-fail detection circuit are used to detect the power down between the zero curve and the firewire
Signal；
Zero fiery voltage detecting circuit, described zero fiery voltage detecting circuit are used to detect zero fire between the zero curve and the firewire
Voltage signal；
Over temperature detection circuit, the over temperature detection circuit are used to detect the temperature signal of three pole pin,
Wherein, the control chip respectively with described zero fiery power-fail detection circuit, the zero fiery voltage detecting circuit and described super
Temperature detector slowdown monitoring circuit is connected, the control chip for according to the power-off signal judge between the zero curve and the firewire whether
Power down occurs, and generates power down protection instruction when generation power down between the zero curve and the firewire, according to zero thermoelectricity
Pressure signal judge the voltage between the zero curve and the firewire whether over-voltage or under-voltage, and the zero curve and the firewire it
Between electric voltage over press or it is under-voltage when generate overvoltage protection instruction or under-voltage protection instruction, and institute is judged according to the temperature signal
State three pole pins whether overtemperature, and overtemperature prote instruction is generated in the three pole pin overtemperature, the trip circuit is for connecing
The power down protection instruction, overvoltage protection instruction, under-voltage protection instruction or the overtemperature prote is received to instruct, and according to
Described in the power down protection instruction, overvoltage protection instruction, under-voltage protection instruction or overtemperature prote instruction generate
Tripping instruction.
3. the protective device of electric heater according to claim 2, which is characterized in that further include：
Second detection unit, the second detection unit corresponds to the zero curve and firewire setting, and second detection is single
First to be connected with electric leakage control chip, the second detection unit is used to detect the electric leakage letter of the zero curve or the firewire
Number,
Wherein, the electric leakage control chip is raw when judging that the zero curve or the firewire leak electricity according to the electric leakage signal
It is instructed at earth leakage protective, the trip circuit is instructed according to the earth leakage protective and given birth to for receiving the earth leakage protective instruction
It is instructed at the tripping.
4. the protective device of electric heater according to claim 3, which is characterized in that it further include power circuit, the electricity
Source circuit includes：
Rectification unit, the rectification unit correspond to the zero curve and firewire setting, and the rectification unit is used for described zero
Line and the alternating current of firewire input are converted into the first direct current；
Pressure unit, the pressure unit is for being depressured to obtain the second direct current first direct current；
Voltage regulation unit, the voltage regulation unit are used to carry out pressure stabilizing to second direct current.
5. the protective device of electric heater according to claim 4, which is characterized in that the zero fiery voltage detecting circuit and
Described zero fiery power-fail detection circuit corresponds to the rectification unit setting.
6. the protective device of electric heater according to claim 5, which is characterized in that the trip circuit includes：
Tripping coil, one end of the tripping coil are connected with the direct-flow positive pole end of the power circuit；
First is silicon-controlled, and the described first silicon-controlled anode tap is connected with the other end of the tripping coil, and described first is controllable
The cathode terminal of silicon is connected with the direct current negative pole end of the power circuit, the described first silicon-controlled control terminal respectively with the master control
Coremaking piece is connected with electric leakage control chip；
Second is silicon-controlled, and the described second silicon-controlled cathode terminal is connected with one end of the tripping coil, and described second is silicon-controlled
Control terminal respectively with the Master control chip and the electric leakage control chip be connected；
Rectifier diode, the anode tap of the rectifier diode are connected with one end of the tripping coil, the rectifier diode
Cathode terminal be connected with the described second silicon-controlled anode tap；
Charge and discharge capacitance, one end of the charge and discharge capacitance are connected with the direct current negative pole end of the power circuit, the charge and discharge
The other end of capacitor is connected with the described second silicon-controlled anode tap.
7. the protective device of electric heater according to claim 5 or 6, which is characterized in that the control chip passes through institute
It states power circuit and obtains power-on reset signal, and electrification reset instruction, the protection dress are generated according to the power-on reset signal
It sets and further includes：
Actuating circuit is powered on, the actuating circuit that powers on is connected with the control chip, and the actuating circuit that powers on is for receiving
The electrification reset instruction, and generated according to electrification reset instruction and power on action command；
Actuating mechanism is powered on, the actuating mechanism that powers on is connected with the actuating circuit that powers on, and the actuating mechanism that powers on is used for
Receive and execute it is described power on action command, with by control the three-pole gang operated switch control the zero curve, the firewire and
The ground wire is in on-state.
8. the protective device of electric heater according to claim 7, which is characterized in that further include：
Reset circuit, the reset circuit are connected with the Master control chip, and the Master control chip is used for according to described multiple
The manual reset operation of position circuit generates manual reset instruction, and the actuating circuit that powers on refers to for receiving the manual reset
It enables, and powers on action command according to manual reset instruction generation.
9. the protective device of electric heater according to claim 8, which is characterized in that further include：
Zero fiery leak(age) test circuit, described zero fiery leak(age) test circuit correspond to the zero curve and the firewire is arranged, and with it is described
Second detection unit is connected, and the electric leakage control chip operates life also according to the man-made chamber to described zero fiery leak(age) test circuit
It is instructed at the earth leakage protective.
10. the protective device of electric heater according to claim 9, which is characterized in that it further include instruction and warning circuit,
The instruction and warning circuit include：
Power supply instruction unit, the power supply instruction unit are connected with the Master control chip, and the power supply instruction unit is used for
The Master control chip judges not occurring between the zero curve and the firewire to issue energization prompt information when power down；
Alarm unit, the alarm unit are connected with the Master control chip, and the alarm unit is used to control in the electric leakage
Chip issues prompt messages when generating earth wire charged protecting instruction.
11. a kind of electric heater, which is characterized in that the guarantor including electric heater according to claim 1 to 10
Protection unit.
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| CN201710393715.1A CN108933427B (en) | 2017-05-27 | 2017-05-27 | Electric water heater and protection device thereof |
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| CN201710393715.1A CN108933427B (en) | 2017-05-27 | 2017-05-27 | Electric water heater and protection device thereof |
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| WO2020118965A1 (en) * | 2018-12-14 | 2020-06-18 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater electric leakage detection method and electric water heater |
| CN113866523A (en) * | 2020-06-30 | 2021-12-31 | 芜湖美的厨卫电器制造有限公司 | Electrical phase detection device and method for household appliance and household appliance |
| CN112325484A (en) * | 2020-11-16 | 2021-02-05 | 广东万和电气有限公司 | Water-feeding power-off protection device of electric water heater and electric water heater with same |
| CN113791269A (en) * | 2021-08-30 | 2021-12-14 | 深圳供电局有限公司 | Socket ground wire abnormity detection method and device and socket |
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| CN108933427B (en) | 2021-02-23 |
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Effective date of registration: 20230324 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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