CN108870764A - A kind of power-off protection apparatus and electric heater of electric heater - Google Patents
A kind of power-off protection apparatus and electric heater of electric heater Download PDFInfo
- Publication number
- CN108870764A CN108870764A CN201811005408.2A CN201811005408A CN108870764A CN 108870764 A CN108870764 A CN 108870764A CN 201811005408 A CN201811005408 A CN 201811005408A CN 108870764 A CN108870764 A CN 108870764A
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- China
- Prior art keywords
- power
- liner
- switch
- protection apparatus
- electric heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
The invention discloses a kind of power-off protection apparatus of electric heater and electric heater, the power-off protection apparatus includes liner live detection mechanism, first control units part and switch；Liner live detection mechanism includes trigger unit, and described trigger unit one end connects the liner of the electric heater, other end ground connection；The first control units part is separately connected liner live detection mechanism and the switch, and the switch is set on the power supply line outside the electric heater；The trigger unit is triggered when the liner charges, and the first control units part controls the switch when the trigger unit is triggered and disconnects the power supply line.The power-off protection apparatus and electric heater of electric heater of the invention, not only effectively prevent the security risk of storage-type electric water heater, also improve the usage experience of user.
Description
Technical field
The present invention relates to household electrical appliances safety technique for using electricity, and in particular to a kind of power-off protection apparatus and electric hot water of electric heater
Device.
Background technique
As the improvement of people's living standards, generally selecting storage-type electric water heater in terms of electric heater selection.Because
Storage-type electric water heater has the features such as installing, is easy to use, water yield is big, water temperature stability, reliable in quality.
But storage-type electric water heater is to be heated by electric heater to the water in liner, and the water in liner is straight
It connects and acts on human body, and water is the conductor of electricity, therefore, storage-type electric water heater has very big security risk in use.
Summary of the invention
To solve existing technical problem, present invention contemplates that providing the power-off protection apparatus and electricity of a kind of electric heater
Water heater prevents the security risk of storage-type electric water heater.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
The embodiment of the invention provides a kind of power-off protection apparatus of electric heater, the power-off protection apparatus includes liner
Live detection mechanism, first control units part and switch；Liner live detection mechanism includes trigger unit, the trigger unit
One end connects the liner of the electric heater, other end ground connection；The first control units part is separately connected the liner band electric-examination
It surveys mechanism and the switch, the switch is set on the power supply line outside the electric heater；The trigger unit is described interior
Gallbladder is triggered when charging, and the first control units part controls the switch when the trigger unit is triggered and disconnects the power supply
Line.
In above scheme, the trigger unit includes luminous component and photo resistance；The luminous component connects the electricity
The liner of water heater, described photo resistance one end connect the first control units part, and the other end is towards the luminous component；It is described
When reaching predeterminated voltage or more, the luminous component is lit for liner electrification, the photo resistance drop to preset value with
Under；When the photo resistance drops to preset value or less, the trigger unit is triggered.
In above scheme, the switch includes trip circuit and tripping mechanism, and the trip circuit is separately connected described the
One control unit and tripping mechanism.
In above scheme, the power-off protection apparatus further includes the first amplification driving circuit, the first amplification driving electricity
Road one end connects the first control units part, and the other end connects the trip circuit.
In above scheme, the power-off protection apparatus further includes the zero firewire detection of electrical leakage mechanism for detecting zero curve or firewire,
The zero firewire detection of electrical leakage mechanism includes the first electromagnetic induction coil and the second control unit；First electromagnetic induction coil
It is sheathed on the zero curve and the firewire；Second control unit one end connects first electromagnetic induction coil, another
End connects the switch；First electromagnetic induction coil senses the zero curve or firewire electric leakage, second control unit
It controls the switch and disconnects the power supply line.
In above scheme, the power-off protection apparatus further includes ground wire electrified detection mechanism, the ground wire electrified detection machine
Structure includes the second electromagnetic induction coil and third control unit；Second electromagnetic induction coil is sheathed on the ground wire, described
Third control unit one end connects second electromagnetic induction coil, and the other end connects the switch；Second electromagnetic induction
Coil-induced to arrive the ground wire electrification, the third control unit controls the switch and disconnects the power supply line.
In above scheme, the first control units part, the second control unit and third control unit are ic core
Piece.
In above scheme, the power-off protection apparatus further includes the second amplification driving circuit and third amplification driving circuit；
Second amplification driving circuit one end connects second control unit, and the other end connects the switch；The third amplification
Driving circuit one end connects the third control unit, and the other end connects the switch.
The embodiment of the invention also provides a kind of electric heater, the electric heater include power supply line, heater, liner and
Any one power-off protection apparatus recited above；The power supply line connects the heater and the power-off protection apparatus, institute
The liner live detection mechanism for stating power-off protection apparatus connects the liner.
In above scheme, the electric heater further includes temperature controller and thermal circuit beraker；The heater is separately connected described
Temperature controller and the thermal circuit beraker.
The power-off protection apparatus and electric heater of electric heater of the invention, including liner live detection mechanism, the first control
Component and switch processed；Liner live detection mechanism includes trigger unit, and described trigger unit one end connects the electric hot water
The liner of device, other end ground connection；The first control units part is separately connected liner live detection mechanism and the switch, institute
Switch is stated to be set on the power supply line outside the electric heater；The trigger unit is triggered when the liner charges, described
First control units part controls the switch when the trigger unit is triggered and disconnects the power supply line；As it can be seen that electricity of the invention
The power-off protection apparatus and electric heater of water heater are disconnected by directly detecting the electrification situation of liner, and according to electrification situation
Power supply line not only effectively prevents the peace of storage-type electric water heater without triggering power-off protection apparatus after constituting circuit by human body
Full hidden danger also improves the usage experience of user.
Other beneficial effects of the invention will combine specific technical solution to further illustrate in a specific embodiment.
Detailed description of the invention
Fig. 1 is the schematic diagram of the power-off protection apparatus of one electric heater of the embodiment of the present invention；
Fig. 2 is the schematic diagram of liner live detection mechanism in the power-off protection apparatus of one electric heater of the embodiment of the present invention；
Fig. 3 is the schematic diagram of the power-off protection apparatus of two electric heater of the embodiment of the present invention；
Fig. 4 is the schematic diagram of three electric heater of the embodiment of the present invention；
Fig. 5 is the electronic schematic diagram of three electric heater of the embodiment of the present invention.
Specific embodiment
It should be noted that unless otherwise indicated and being limited, term " connection " should be done extensively in record of the embodiment of the present invention
Reason and good sense solution, for example, it may be electrical connection, the connection being also possible to inside two elements can be directly connected, can also pass through
Intermediary is indirectly connected, and for the ordinary skill in the art, can understand above-mentioned term as the case may be
Concrete meaning.
It should be noted that the term " Yi Er third " that the embodiment of the present invention such as relates to be only distinguish it is similar
Object, do not represent the particular sorted for object, it is possible to understand that ground, " Yi Er third " can be in the case where permission
Exchange specific sequence or precedence.It should be understood that the object that " first second third " is distinguished in the appropriate case can be mutual
It changes, so that the embodiment of the present invention described herein can be real with the sequence other than those of illustrating or describing herein
It applies.
In the prior art, electric heater has the following problems：
1) external power supply line anomalies reason, when leading to electric heater ground wire electrification, limit is for example arranged in prior art
Current device processed makes the electric current that may flow into human body within limit value, or：Earth leakage protective device is set and works as human body and electric heating
Leakage current after hydrophone is in contact reaches limit value or more and acts power-off, although being able to achieve electric heater ground wire electrification
Security protection, but cannot be automatically powered off before human perception electrification is dangerous, bad usage experience is brought to user, it also can be to electricity
The safety of water heater generates query；
2) external power supply line anomalies reason, when causing electric heater ground wire bad or even lacking, if inside electric heater
Charging member insulation occurs to destroy and generate electric leakage, also will appear the situation of electric heater ground wire electrification as described above；
3) external power supply line anomalies reason, when causing electric heater ground wire bad or even lacking, if inside electric heater
Charging member insulation occurs to destroy and generate electric leakage, after the situation for electric heater ground wire electrification as described above occur, can also
Electric heater ground wire electrification is conducted to other consuming devices by external power supply route, so to non-electric heater user with
Carry out Danger Electric shock risk.
In view of the above technical problems, the embodiment of the invention provides a kind of power-off protection apparatus of electric heater, described disconnected
Electrical protective device may include liner live detection mechanism, first control units part and switch；Liner live detection mechanism packet
Trigger unit is included, described trigger unit one end connects the liner of the electric heater, other end ground connection；The first control units part
It is separately connected liner live detection mechanism and the switch, it is described to switch the power supply line being set to outside the electric heater
On；The trigger unit is triggered when the liner charges, and the first control units part is when the trigger unit is triggered
It controls the switch and disconnects the power supply line.
Here, after the trigger unit is triggered, the first control units part can be sent a signal to, the signal can be with
It is voltage signal, is also possible to other control signals, such as pulse signal.
Described trigger unit one end connects the liner of the electric heater, other end ground connection, and liner generally connects ground wire,
Therefore the liner, trigger unit and ground constitute circuit, then if the liner charges, trigger unit can also be charged, i.e. institute
Stating trigger unit can be triggered.It needs exist for illustrating, when it is implemented, the trigger unit is triggered, in addition to the liner band
Electricity, it is also necessary to which the carried charge of liner reaches preset value, and preset value here is the value that can be arrived by human perception.
Here ground is not necessarily properly, can be be connected to, be more easily installed and electric heater
The building position of the metallic object of connection, such as ground in building or wall etc..
The principle of the embodiment of the present invention：Power supply is disconnected by directly detecting the electrification situation of liner, and according to electrification situation
Line, without triggering power-off protection apparatus after constituting circuit by human body, the safety for not only effectively preventing storage-type electric water heater is hidden
Suffer from, also improves the usage experience of user.
In one embodiment, the trigger unit may include luminous component and photo resistance；The luminous component
Connect the liner of the electric heater, described photo resistance one end connects the first control units part, and the other end is towards the hair
Light component；When the liner electrification reaches predeterminated voltage or more, the luminous component is lit, the photo resistance decline
To preset value；When the photo resistance drops to preset value or less, the trigger unit is triggered.The default electricity
Press the journey for having reached the appreciable degree of human body the above are the carried charge of the liner of the electric heater or being hazardous to the human body
Degree, human body can perceive but also will affect user experience the case where being safe from harm, so needing to control；The trigger unit includes
Luminous component and photo resistance, and luminous component and photo resistance are not directly connected, and can be avoided the electrification of the liner
Influence to the first control units part.Certainly, it will be appreciated by those of skill in the art that the trigger unit is also possible to directly
The first control units part is connect in succession, but the part avoided by voltage influence can be set in the first control units part.
In one embodiment, the switch may include trip circuit and tripping mechanism, the trip circuit difference
Connect the first control units part and tripping mechanism.Tripping mechanism can be automatically brought into operation described according to the signal of the trip circuit
The closing or opening of switch, that is, be convenient for automatic operation, and trip circuit is used to allow institute according to the instruction of control unit sending
State the signal of tripping mechanism movement.It is understood that described switch the switch that can be other types, for example, the switch can be with
It is automatic air-break switch.
In one embodiment, the power-off protection apparatus can also include the first amplification driving circuit, described first
Amplification driving circuit one end connects the first control units part, and the other end connects the trip circuit.The first amplification driving
Circuit can drive the trip circuit, the tripping electricity for amplifying the signal of the first control units part in this way
Road is usually the switch of power transistor type, and the signal of the first control units part is that can not drive the function before not amplifying
Rate transistor.It is understood that if being not necessarily to first amplification driving circuit when being provided with single-chip microcontroller or analog circuit,
It can control the open and close of the switch.
In one embodiment, the power-off protection apparatus can also include the zero firewire electric leakage of detection zero curve or firewire
Testing agency, the zero firewire detection of electrical leakage mechanism include the first electromagnetic induction coil and the second control unit；First electricity
Magnetic induction coil is sheathed on the zero curve and the firewire；Second control unit one end connects first electromagnetic induction
Coil, the other end connect the switch；First electromagnetic induction coil senses that the zero curve or firewire leak electricity, described second
Control unit controls the switch and disconnects the power supply line.If the electric current in the zero curve or the firewire does not leak electricity,
Electric current in the zero curve and the firewire be it is equal, then the magnetic field near the zero curve and the firewire is despite variation
, but all synchronously counteracted, the electromotive force that first electromagnetic induction coil senses is zero.On the contrary, if described zero
Electric current in line or the firewire leaks electricity.First electromagnetic induction coil can sense electromotive force.In this way, feeling in user
Before knowing, with regard to already off, user uses safer power supply.
In one embodiment, the power-off protection apparatus can also include ground wire electrified detection mechanism, the ground wire
Live detection mechanism includes the second electromagnetic induction coil and third control unit；Second electromagnetic induction coil is sheathed on described
Ground wire, third control unit one end connect second electromagnetic induction coil, and the other end connects the switch；Described second
Electromagnetic induction coil senses that the ground wire electrification, the third control unit control the switch and disconnect the power supply line.Such as
Ground wire electrification described in fruit, then second electromagnetic induction coil can sense electromotive force.In this way, in this way, user perception before, electricity
With regard to already off, user uses safer in source.
In one embodiment, the first control units part, the second control unit and third control unit may each be
Integrated circuit (IC, integrated circuit) chip, more specifically, the first control units part, the second control unit and
Third control unit may each be micro-control unit (MCU, Micro Control Unit).MCU is standardized control unit,
In this way, not only easy to control, cost of manufacture is also relatively low.
In one embodiment, the power-off protection apparatus can also include that the second amplification driving circuit and third are amplified
Driving circuit；Second amplification driving circuit one end connects second control unit, and the other end connects the switch；It is described
Third amplification driving circuit one end connects the third control unit, and the other end connects the switch.The second amplification driving
The effect of circuit and third amplification driving circuit is repeated no more with the first amplification driving circuit.When it is implemented, described first puts
Driving circuit, second amplification driving circuit and the third amplification driving circuit can be same greatly, because of switch one
As be arranged one, this spline structure is more simplified.
The embodiment of the invention also provides a kind of electric heater, the electric heater may include power supply line, heater, interior
Gallbladder and any one power-off protection apparatus recited above；The power supply line connects the heater and power-off protection dress
It sets, the liner live detection mechanism of the power-off protection apparatus connects the liner.The power-off protection apparatus can be described
Liner acts when charging, and can also act when zero curve, firewire electric leakage and ground wire electrification in the power supply line.
In one embodiment, the electric heater can also include temperature controller and thermal circuit beraker；The heater point
The temperature controller and the thermal circuit beraker are not connected；The temperature controller is used to control the heating temperature of the heater, the heat
When breaker fails for the temperature controller, stop the work of the heating in time.In this way, the electric hot water can be accurately controlled
The heating temperature of device, it is also safer.
Here, the temperature controller can use electronic type control mode, can also use mechanical control mode, not make in detail
It states.
Below in conjunction with drawings and the specific embodiments, the present invention will be described in further detail.It should be appreciated that this place is retouched
It states that specific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment one
Fig. 1 is the schematic diagram of the power-off protection apparatus of one electric heater of the embodiment of the present invention, as shown in Figure 1, the present invention is real
Apply example and provide a kind of power-off protection apparatus of electric heater, the power-off protection apparatus include liner live detection mechanism 11,
First control units part 12 and switch 13；Liner live detection mechanism includes trigger unit (referring to fig. 2), the trigger unit
One end connects the liner 14 of the electric heater, other end ground connection；The first control units part 12 is separately connected the liner band
Electro-detection mechanism 11 and the switch 13, it is described to switch on the power supply line 17 being set to outside the electric heater；If in described
Gallbladder 14 charges, then the trigger unit is triggered, and the first control units part 12 controls the switch 13 and disconnects the power supply line
17。
In the present embodiment, it is equipped with heater 15 in the liner 14, is describedly wall metal bolts 16, in this way, also just
It is connected in trigger unit.
As shown in Fig. 2, liner live detection mechanism 11 includes trigger unit and insulator spacer 113, the triggering
Component includes luminous component 111 and photo resistance 112, and the luminous component 111 connects the liner 14 of the electric heater；It is described
112 one end of photo resistance connects the first control units part 12, and the other end is towards the luminous component 111；The liner electrification
When reaching predeterminated voltage or more, the luminous component is lit, and the photo resistance drops to preset value or less；The light
When quick resistance drops to preset value or less, the trigger unit is triggered；111 1 contacts of the luminous component are connected to
Wall metal bolts 16, another contact are connected to liner 14.
In the present embodiment, according to human body to the perception degree of electrical body, it is set as：The electricity at 111 both ends of luminous component
It is pressed in 30V or more, the trigger unit is triggered；Further, the power-off protection apparatus is arranged to：The trigger unit
After being triggered, the power supply line 17 is disconnected in 0.3 second.
In this way, either ground wire electrification causes liner to charge, or because electric heater built-in electrical insulation is impaired and in occurring
Gallbladder electrification can disconnect power supply line before human perception, guarantee user security and good usage experience.
In the present embodiment, what the luminous component 111 and photo resistance 112 were not directly connected to, but shone by described
The light that component 111 issues triggers the photo resistance 112, and is both fixed in the insulator spacer 113, can
Avoid influence of the electrification of the liner 14 to the first control units part 12.
Embodiment two
Fig. 3 is the schematic diagram of the power-off protection apparatus of two electric heater of the embodiment of the present invention, as shown in figure 3, the present invention is real
It applies example and additionally provides the power-off protection apparatus of another electric heater, the power-off protection apparatus includes liner live detection mechanism
11, first control units part 12, switch 13, zero firewire detection of electrical leakage mechanism 21 and ground wire electrified detection mechanism 22；Wherein
The switch 13 is set on power supply line 17, and described 17 one end of power supply line is three pole pins 231, and the other end is connected to
Heater 15, the switch 13 are set on the conducting wire between three pole pin 231 and the heater；
The switch 13 includes trip circuit 131 and tripping mechanism 132, and the trip circuit 131 is separately connected described the
One control unit 12 and tripping mechanism 132.Tripping mechanism can be automatically brought into operation the switch according to the signal of the trip circuit
Closing or opening, that is, be convenient for automatic operation, trip circuit is used to allow according to the instruction of control unit sending described de-
The signal of buckle mechanism movement.For the trip circuit 131, institute can be driven convenient for the control signal of the first control units part 12
Stating power-off protection apparatus can also include the first amplification driving circuit 133, and described first amplification driving circuit, 133 one end connects institute
First control units part is stated, the other end connects the trip circuit.First amplification driving circuit by described first for controlling
The signal of component amplifies, and can drive the trip circuit in this way；
In the present embodiment, the trip circuit 131 is the switch of power transistor type, and the tripping mechanism 132 also wraps
Include three-pole gang operated switch 1321, the three-pole gang operated switch 1321 can be with one-off by the zero curve, firewire and ground of power supply line 17
Line is all off.
In the present embodiment, the zero firewire detection of electrical leakage mechanism 21 includes the first electromagnetic induction coil 211 and the second control
Component 212；First electromagnetic induction coil 211 is sheathed on the zero curve and the firewire；Second control unit 212
One end connects first electromagnetic induction coil 211, and the other end connects the switch 13；The zero curve or firewire electric leakage, i.e. institute
State zero curve or firewire voltage it is inconsistent when, first electromagnetic induction coil can sense electromotive force, and pass through described second
Control unit controls the switch and disconnects the power supply line 17.In this way, power supply is with regard to already off, user before user's perception
Using safer.
In the present embodiment, according to human body to the perception degree of electrical body, it is set as：The zero curve or the electric current of firewire electric leakage
Value controls the switch and disconnects the power supply line 17 in 15mA or more, second control unit；Further, the reaction of disconnection
Time is arranged to：The zero curve or the current value of firewire electric leakage are detected in 15mA, the power supply line 17 quilt in 0.1 second
It disconnects.
In this way, if zero curve or firewire electric leakage, either because electric heater built-in electrical insulation is impaired or wire insulation by
Damage can disconnect power supply line before human perception, guarantee user security and good usage experience.
Here, described for the trip circuit 131 can be driven convenient for the control signal of second control unit 212
Second control unit 212 is connect also by first amplification driving circuit 133 with the trip circuit 131.
In the present embodiment, the ground wire electrified detection mechanism 22 includes the second electromagnetic induction coil 221 and third control unit
Part 222；Second electromagnetic induction coil 221 is sheathed on the ground wire, 222 one end of third control unit connection described the
Two electromagnetic induction coils 221, the other end connect the switch 13；When the ground wire electrification, the second electromagnetic induction coil energy
It senses electromotive force, and the switch is controlled by the third control unit and disconnects the power supply line 17.In this way, feeling in user
Before knowing, with regard to already off, user uses safer power supply.
In the present embodiment, according to human body to the perception degree of electrical body, it is set as：The current value of the ground wire electrification exists
30mA or more, the third control unit control the switch and disconnect the power supply line 17；Further, the reaction time of disconnection
It is arranged to：The zero curve or the current value of firewire electric leakage are detected in 30mA, and the power supply line 17 is broken in 0.3 second
It opens.
In this way, no matter external power supply line anomalies, or there is ground wire electrification because electric heater built-in electrical insulation is impaired,
Power supply line can be disconnected before human perception, guarantee user security and good usage experience.
Similarly, for the trip circuit 131, institute can be driven convenient for the control signal of the third control unit 222
It states third control unit 222 and is connect also by first amplification driving circuit 133 with the trip circuit 131.
In the present embodiment, the first control units part, the second control unit and third control unit may each be can be with
It is MCU, MCU is standardized control unit, in this way, not only easy to control, cost of manufacture is also relatively low.
In the present embodiment, in order to be concise in expression, the specific structure of liner live detection mechanism 11 and heater 15 is omitted,
The specific structure of liner live detection mechanism 11 may refer to embodiment one, and the specific structure of the heater 15 can join
See embodiment three.
Embodiment three
Fig. 4 is the schematic diagram of three electric heater of the embodiment of the present invention, and Fig. 5 is the electrical of three electric heater of the embodiment of the present invention
Schematic illustration, as shown in Figure 4,5, the embodiment of the invention also provides a kind of electric heater, the electric heater includes power supply
Line 17, power-off component 31, thermal circuit beraker 32, temperature controller 33, heater 15, liner 14 and liner live detection mechanism 11；It is described
Power supply line 17 connects the heater 15 by the thermal circuit beraker 32 and temperature controller 33, and the power-off component 31 is arranged described
On power supply line 17 outside thermal circuit beraker 32,11 one end of liner live detection mechanism connects the liner 14 of the electric heater,
Other end ground connection, that is, connect the wall metal bolts 16.
The power-off component 31 of the present embodiment is equivalent to first control units part 12 and switch 13 in embodiment one, i.e., described disconnected
Electrical components 31 decide whether to disconnect the power supply line 17 according to the detection case of liner live detection mechanism 11.
The temperature controller 33 is used to control the heating temperature of the heater, and the thermal circuit beraker 32 is used for the temperature controller
When failure, stop the work of the heating in time.In this way, the heating temperature of the electric heater can be accurately controlled, also more pacify
Entirely.The temperature controller 33 is electronic type control mode.
Example IV
The present embodiment additionally provides another electric heater, the electric heater, in addition to increasing zero firewire detection of electrical leakage
Except mechanism and ground wire electrified detection mechanism, other contents are identical as the embodiment three, and zero firewire is specifically described below
Detection of electrical leakage mechanism and ground wire electrified detection mechanism.
Connection relationship and each composition between the composed structure of the zero firewire detection of electrical leakage mechanism, each component part
The partial principle of work and power is identical as the description of zero firewire detection of electrical leakage mechanism 21 in embodiment two, repeats no more.
The connection relationship of the zero firewire detection of electrical leakage mechanism and the other components of the electric heater：The zero firewire electric leakage
Second control unit 212 of testing agency connects the switch 13, the first electromagnetism sense of the zero firewire detection of electrical leakage mechanism 21
Coil 211 is answered to be sheathed on zero curve and firewire in the power supply line 17.Certainly, as with embodiment two, second control
Amplification driving circuit is also equipped between component 212 and the switch 13.
Connection relationship and each composition portion between the composed structure of the ground wire electrified detection mechanism, each component part
The principle of work and power divided is identical as the description of ground wire electrified detection mechanism 22 in embodiment two, repeats no more.
The connection relationship of the ground wire electrified detection mechanism and the other components of the electric heater：The ground wire electrified detection
The third control unit 222 of mechanism connects the switch 13, the second electromagnetic induction coil of the ground wire electrified detection mechanism 22
221 are sheathed on the ground wire in the power supply line 17.Certainly, as with embodiment two, second control unit 212 and described
Amplification driving circuit is also equipped between switch 13.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention, should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of power-off protection apparatus of electric heater, which is characterized in that the power-off protection apparatus includes liner live detection
Mechanism, first control units part and switch；Liner live detection mechanism includes trigger unit, trigger unit one end connection
The liner of the electric heater, other end ground connection；The first control units part be separately connected liner live detection mechanism and
The switch, the switch are set on the power supply line outside the electric heater；The trigger unit is when the liner charges
It is triggered, the first control units part controls the switch when the trigger unit is triggered and disconnects the power supply line.
2. power-off protection apparatus according to claim 1, which is characterized in that the trigger unit includes luminous component and light
Quick resistance；The luminous component connects the liner of the electric heater, and described photo resistance one end connects the first control units
Part, the other end is towards the luminous component；When the liner electrification reaches predeterminated voltage or more, the luminous component is lit,
The photo resistance drops to preset value or less；When the photo resistance drops to preset value or less, the triggering
Component is triggered.
3. power-off protection apparatus according to claim 1 or 2, which is characterized in that the switch includes trip circuit and takes off
Buckle mechanism, the trip circuit are separately connected the first control units part and tripping mechanism.
4. power-off protection apparatus according to claim 3, which is characterized in that the power-off protection apparatus further includes first putting
Big driving circuit, first amplification driving circuit one end connect the first control units part, and the other end connects the tripping electricity
Road.
5. power-off protection apparatus according to claim 1, which is characterized in that the power-off protection apparatus further includes detection zero
Zero firewire detection of electrical leakage mechanism of line or firewire, the zero firewire detection of electrical leakage mechanism include the first electromagnetic induction coil and second
Control unit；First electromagnetic induction coil is sheathed on the zero curve and the firewire；Second control unit one end
First electromagnetic induction coil is connected, the other end connects the switch；First electromagnetic induction coil senses described zero
Line or firewire electric leakage, second control unit control the switch and disconnect the power supply line.
6. power-off protection apparatus according to claim 1, which is characterized in that the power-off protection apparatus further includes ground tape
Electro-detection mechanism, the ground wire electrified detection mechanism include the second electromagnetic induction coil and third control unit；Second electricity
Magnetic induction coil is sheathed on the ground wire, and third control unit one end connects second electromagnetic induction coil, the other end
Connect the switch；Second electromagnetic induction coil senses the ground wire electrification, described in the third control unit control
Switch disconnects the power supply line.
7. power-off protection apparatus according to claim 5 or 6, which is characterized in that the first control units part, the second control
Component and third control unit are IC chip.
8. power-off protection apparatus according to claim 5 or 6, which is characterized in that the power-off protection apparatus further includes
Two amplification driving circuits and third amplification driving circuit；Second amplification driving circuit one end connects second control unit
Part, the other end connect the switch；Third amplification driving circuit one end connects the third control unit, other end connection
The switch.
9. a kind of electric heater, which is characterized in that the electric heater include power supply line, heater, liner and claim 1~
Power-off protection apparatus described in 8 any one；The power supply line connects the heater and the power-off protection apparatus, described disconnected
The liner live detection mechanism of electrical protective device connects the liner.
10. electric heater according to claim 9, which is characterized in that the electric heater further includes that temperature controller and heat are disconnected
Road device；The heater is separately connected the temperature controller and the thermal circuit beraker.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109581141A (en) * | 2018-12-14 | 2019-04-05 | 青岛经济技术开发区海尔热水器有限公司 | A kind of electrical leakage detecting method and electric heater of electric heater |
| CN111435037A (en) * | 2018-12-26 | 2020-07-21 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater and electric leakage detection method thereof |
| 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 |
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| 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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Application publication date: 20181123 |