CN106681397B - Electrical equipment and PTC electric heater control circuit for it - Google Patents
Electrical equipment and PTC electric heater control circuit for it Download PDFInfo
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- CN106681397B CN106681397B CN201710098306.9A CN201710098306A CN106681397B CN 106681397 B CN106681397 B CN 106681397B CN 201710098306 A CN201710098306 A CN 201710098306A CN 106681397 B CN106681397 B CN 106681397B
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- zero cross
- electric heater
- electrical equipment
- ptc electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
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Abstract
The invention discloses a kind of electrical equipment and for its PTC electric heater control circuit, the circuit includes：Controllable silicon drive circuit, including the first energization end, the second energization end and drive control end；Temperature protection switch is in normal closure state, and is disconnected when the heating temperature of PTC electric heater is more than preset temperature threshold to carry out temperature protection；Zero cross detection circuit, including zero cross signal input terminal and zero cross signal test side, are detected for the zero cross signal to power supply；Control module judges that temperature protection switch is in closed state, and when electrical equipment needs to open PTC electric heater, by drive control end output drive signal to power to PTC electric heater when zero cross detection circuit detects zero cross signal.Circuit according to the present invention can rapidly and reliably realize the control to PTC electric heater, can be effectively prevented from security risk, and the control port by connecting less control module, can reduce the occupancy of resource.
Description
Technical field
The present invention relates to technical field of electrical equipment, more particularly to a kind of PTC electric heater for electrical equipment controls
Circuit and a kind of electrical equipment.
Background technology
In electrical equipment, PTC (Positive Temperature Coefficient, positive temperature coefficient) electric heater
It is a kind of common function load, can be powered by the power supply such as 220V AC powers for being input to electrical equipment, mainly
Effect is to provide thermal energy for electrical equipment such as beauty product, and water mist heating, the functions such as steam heating may be implemented.Because beauty is produced
The volume of product is typically small, circuit board size also very little, and relay volume is difficult to meet its requirement, and high expensive, institute
Use SCR (Silicon Controlled Rectifier, silicon controlled rectifier (SCR)) as driving PTC electricity substantially with beauty product
The device of heater.
Currently, driving the control circuit of PTC electric heater may include using SCR：Controllable silicon drive circuit, temperature protection are opened
It closes detection circuit, zero cross detection circuit and MCU (Single Chip Microcomputer, microcontroller) and controls chip.The control
Circuit presently, there are the problem of mainly have：(1) temperature protection switch detection circuit is controlled by MCU control chips, in reality
During the use of border, MCU control chip be interfered after, will produce flase drop, cause PTC electric heater mistake opening or
It closes；(2) detect that the temperature of PTC electric heater reaches the limit values from MCU control chips, until control temperature protection switch inspection
Slowdown monitoring circuit closing temperature protection switch, will produce a time delay between this, there are some potential safety problemss；(3) silicon-controlled
Driving circuit, temperature protection switch detection circuit and zero cross detection circuit respectively need the driving of the MCU of a MCU control chip
Mouthful, occupy excessive MCU resources.
Invention content
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, the present invention
One purpose is to propose a kind of PTC electric heater control circuit for electrical equipment, can rapidly and reliably realize pair
The control of PTC electric heater can be effectively prevented from security risk, and the control terminal by connecting less control module
Mouthful, the occupancy of resource can be reduced.
Second object of the present invention is to propose a kind of electrical equipment.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of PTC electrical heating for electrical equipment
Device control circuit, including：Controllable silicon drive circuit, the controllable silicon drive circuit include the first energization end, the second energization end and
Drive control end；Temperature protection switch, one end of the temperature protection switch and the one of the power supply for being input to electrical equipment
End is connected, and the other end of the temperature protection switch is connected with the first energization end of the controllable silicon drive circuit, and the temperature
There is first node between the other end and first energization end of degree protection switch, wherein the temperature protection switch is in
Normal closure state, and disconnected when the heating temperature of PTC electric heater is more than preset temperature threshold to carry out temperature protection；Zero passage
Detection circuit, the zero cross detection circuit include zero cross signal input terminal and zero cross signal test side, the zero cross signal input
End is connected with the first node, and the zero cross detection circuit is for being detected the zero cross signal of the power supply；Control
Molding block, the control module mistake with the drive control end and the zero cross detection circuit of the controllable silicon drive circuit respectively
Zero-signal test side is connected, and the control module, which is used to detect the zero cross detection circuit by the zero cross signal test side, is
It is no to detect the zero cross signal, and when the zero cross detection circuit detects the zero cross signal, judge that the temperature is protected
Shield switch is in closed state, and when the electrical equipment needs to open the PTC electric heater, is controlled by the driving
End output drive signal processed is connected with the first energization end for controlling the controllable silicon drive circuit with the second energization end, so that described
Power supply is powered to the PTC electric heater.
PTC electric heater control circuit according to the ... of the embodiment of the present invention for electrical equipment passes through zero cross detection circuit
The zero cross signal of power supply is detected, when zero cross detection circuit detects zero cross signal, is judged by control module
Often the temperature protection switch in closed state is in closed state, is more than preset temperature in the heating temperature of PTC electric heater
Break-off signal protection switch is to carry out temperature protection when threshold value, and when electrical equipment needs to open PTC electric heater, passes through
The drive control end output drive signal of control module is to control the first energization end and the second energization end of controllable silicon drive circuit
Conducting, so that power supply is powered to PTC electric heater.The circuit can rapidly and reliably be realized to PTC electric heater
Control can be effectively prevented from security risk, and the control port by connecting less control module, can reduce resource
It occupies.
In addition, may be used also according to the PTC electric heater control circuit for electrical equipment that the above embodiment of the present invention proposes
To have following additional technical characteristic：
According to one embodiment of present invention, the control module be additionally operable to judge the temperature protection switch be in close
After conjunction state, opened according to function load described in the portative unlatching demand control of the work(of the electrical equipment.
According to one embodiment of present invention, the control module is additionally operable to that institute is not detected in the zero cross detection circuit
When stating zero cross signal, judge that the temperature protection switch is off, and directly controls the function load and close.
According to one embodiment of present invention, the controllable silicon drive circuit includes drive signal amplifying unit and silicon-controlled
Unit.
According to one embodiment of present invention, the drive signal amplifying unit includes：First resistor, the first resistor
Drive control end of the one end as the controllable silicon drive circuit；First triode, the base stage of first triode and institute
The other end for stating first resistor is connected, and the emitter ground connection of first triode；Second resistance, the second resistance are in parallel
Between the base stage and emitter of first triode；3rd resistor, one end of the 3rd resistor and the one or three pole
The collector of pipe is connected, and the other end of the 3rd resistor amplifies output end as the signal of the drive signal amplifying unit.
According to one embodiment of present invention, the silicon-controlled unit includes：First light emitting diode, described first shines
The cathode of diode is connected with the signal of drive signal amplifying unit amplification output end, the sun of first light emitting diode
Pole is connected to the first DC power supply；First is silicon-controlled and second is silicon-controlled, wherein described first is silicon-controlled and described first shines
Diode constitutes the first optocoupler, described first the first silicon-controlled main electrode and the described second silicon-controlled third main electrode phase
Even, described first the second silicon-controlled main electrode is connected with the described second silicon-controlled control pole, and described second silicon-controlled the
Three main electrodes and second the 4th silicon-controlled main electrode are respectively as first energization end and second energization end.
According to one embodiment of present invention, the zero cross detection circuit includes：First diode, first diode
Anode tap as the zero cross signal input terminal；4th resistance, one end and first diode of the 4th resistance
Cathode is connected；Second optocoupler, second optocoupler include the second light emitting diode and the first phototriode, wherein described the
The anode and cathode of two light emitting diodes respectively as second optocoupler first input end and the second input terminal, described first
First output end and second output terminal of the collector and emitter of phototriode respectively as second optocoupler, wherein
Second input terminal of second optocoupler is connected with the other end for being input to power supply described in the electrical equipment；5th resistance
With the second diode, the 5th resistance and second diodes in parallel be connected to second optocoupler first input end and
Between second input terminal；One end of 6th resistance, the 6th resistance is connected with the first output end of second optocoupler, described
The other end of 6th resistance is connected to the first DC power supply；7th resistance, one end and second optocoupler of the 7th resistance
The first output end be connected, the other end of the 7th resistance is as the zero cross signal test side；First capacitance, described first
One end of capacitance is connected with the other end of the 7th resistance, the other end of first capacitance and the second of second optocoupler
Output end is connected, and the other end ground connection of first capacitance.
According to one embodiment of present invention, the electrical equipment is facial vaporizer, and the function load includes anion hair
Raw device and/or atomizer.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of electrical equipment, including above-mentioned is used for
The PTC electric heater control circuit of electrical equipment.
Electrical equipment according to the ... of the embodiment of the present invention controls electricity using the above-mentioned PTC electric heater for electrical equipment
Road can rapidly and reliably realize the control to PTC electric heater, can be effectively prevented from security risk, and pass through company
The control port of less control module is connect, the occupancy of fewer resource is capable of.
Description of the drawings
Fig. 1 is the structural schematic diagram of the PTC electric heater control circuit according to the ... of the embodiment of the present invention for electrical equipment；
Fig. 2 is the controlling party of the PTC electric heater control circuit according to an embodiment of the invention for electrical equipment
The flow chart of method；And
Fig. 3 is the block diagram of electrical equipment according to the ... of the embodiment of the present invention.
Specific implementation mode
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 for explaining the present invention, and is not considered as limiting the invention.
Below in conjunction with the accompanying drawings come describe the embodiment of the present invention electrical equipment and for its PTC electric heater control electricity
Road.
Fig. 1 is the structural schematic diagram of the PTC electric heater control circuit according to the ... of the embodiment of the present invention for electrical equipment.
It should be noted that in embodiments of the present invention, the PTC electric heater control circuit for electrical equipment can be applied
In the electrical equipment that beauty product such as facial vaporizer has heating function.
As shown in Figure 1, the embodiment of the present invention be used for PTC electric heater control circuit, including：Controllable silicon drive circuit
10, temperature protection switch 20, zero cross detection circuit 30 and control module 40.
Wherein, controllable silicon drive circuit 10 may include the first energization end ACN, the second energization end ACL and drive control end
SCR_DRIVE.One end of temperature protection switch 20 is connected with one end ACN1 for the power supply for being input to electrical equipment, and temperature is protected
The other end of shield switch 20 is connected with the first energization end ACN of controllable silicon drive circuit 10, and temperature protection switch 20 is another
There is first node J1, wherein temperature protection switch 20 is in normal closure state, and in PTC between end and the first energization end ACN
It is disconnected when the heating temperature of electric heater is more than preset temperature threshold to carry out temperature protection.Zero cross detection circuit 30 may include
Zero-signal input terminal and zero cross signal test side ZERO_DRIVE, zero cross signal input terminal are connected with first node J1, zero passage inspection
Slowdown monitoring circuit 30 is for being detected the zero cross signal of power supply.The drive with controllable silicon drive circuit 10 respectively of control module 40
Dynamic control terminal SCR_DRIVE is connected with the zero cross signal test side ZERO_DRIVE of zero cross detection circuit 30, and control module 40 is used
In detecting whether zero cross detection circuit 30 detects zero cross signal by zero cross signal test side ZERO_DRIVE, and examined in zero passage
When slowdown monitoring circuit 30 detects zero cross signal, judge that temperature protection switch 20 is in closed state, and open in electrical equipment needs
It, can to control by the drive control end SCR_DRIVE output drive signals of controllable silicon drive circuit 10 when opening PTC electric heater
First energization end ACN of control silicon driving circuit 10 is connected with the second energization end ACL, so that power supply is supplied to PTC electric heater
Electricity.
That is, in an embodiment of the present invention, passing through two of the control module 40 of PTC electric heater control circuit
Control port is believed with the zero passage of the drive control end SCR_DRIVE of controllable silicon drive circuit 10 and zero cross detection circuit 30 respectively
Number test side ZERO_DRIVE is connected, and temperature protection switch 20 is connected with controllable silicon drive circuit 10, comparatively can be with
Occupy the control port of less control module 40.
In one embodiment of the invention, it is exported by the drive control end SCR_DRIVE of controllable silicon drive circuit 10
Drive signal, controllable first energization end ACN is connected with the second energization end ACL, so that power supply such as 220V AC powers are given
PTC electric heater is powered.When the heating temperature of PTC electric heater is less than preset temperature threshold, at temperature protection switch 20
In normal closure state, when the heating temperature of PTC electric heater is more than preset temperature threshold, break-off signal protect switch 20 with into
Trip temperature is protected, wherein temperature protection switch 20 can be the temperature detect switch (TDS) of peripheral hardware, and preset temperature threshold can be according to actual conditions
It is demarcated, is not limited here specifically.When temperature protection switch 20 is off, on the one hand, PTC electrical heating can be made
The power supply of device is off, and the temperature so as to be effectively prevented PTC electric heater is excessively high to make electrical equipment
At damage, security risk can be avoided, on the other hand, also so that the circuit of zero cross detection circuit 30, which is in, disconnects transition, is passed through
The zero cross signal test side ZERO_DRIVE of zero cross detection circuit 30 is unable to detect that the zero cross signal of power supply.Therefore,
When zero cross detection circuit 30 detects zero cross signal, main control module 40 can determine whether that temperature protection switch 20 is in closed state,
When zero cross signal is not detected in zero cross detection circuit 30, main control module 40 can determine whether that temperature protection switch 20 is in and disconnect shape
State.
In one embodiment of the invention, control module 40 can also be used to judge temperature protection switch 20 in closure
After state, opened according to the portative unlatching demand control function load of the work(of electrical equipment, wherein electrical equipment can be to steam face
Device, function load may include anion generator and/or atomizer.
Specifically, when the zero cross signal test side ZERO_DRIVE of zero cross detection circuit 30 detects zero cross signal, control
Molding block 40 can determine whether that temperature protection switch 20 is in closed state, and then control module 40 can further determine whether to need to open
PTC electric heater is opened, if it is, opening PTC electric heater.Temperature protection switch 20 in the closure state, can also lead to
It crosses control module 40 to judge whether that open function is needed to load, if it is, according to the portative unlatching need of work(of electrical equipment
Ask the unlatching for carrying out control function load.
In one embodiment of the invention, control module 40 can also be used to examine in the zero cross signal of zero cross detection circuit 30
When zero cross signal is not detected in survey end ZERO_DRIVE, judge that temperature protection switch 20 is off, and directly control work(
It can load closing.
In one embodiment of the invention, as shown in Figure 1, controllable silicon drive circuit 10 may include that drive signal amplification is single
Member 11 and silicon-controlled unit 12.
Specifically, in one embodiment of the invention, as shown in Figure 1, drive signal amplifying unit 11 may include：First
Resistance R1, the first triode Q1, second resistance R2 and 3rd resistor R3.One end of first resistor R1 is as controllable silicon drive circuit
10 drive control end SCR_DRIVE；The base stage of first triode Q1 is connected with the other end of first resistor R1, and the one or three pole
The emitter of pipe Q1 is grounded GND；Second resistance R2 is connected in parallel between the base stage and emitter of the first triode Q1；3rd resistor R3
One end be connected with the collector of the first triode Q1, the letter of the other end of 3rd resistor R3 as drive signal amplifying unit 11
Number amplification output end.Drive signal amplifying unit 11 can be amplified drive signal.
Specifically, in one embodiment of the invention, as shown in Figure 1, silicon-controlled unit 12 may include：First luminous two
Pole pipe LED1, the first controllable silicon SCR 1 and the second controllable silicon SCR 2.The cathode of first Light-emitting diode LED 1 is put with drive signal
The signal amplification output end of big unit 11 is connected, and the anode of the first Light-emitting diode LED 1 is connected to the first DC power supply VDD；The
One controllable silicon SCR 1 and the first Light-emitting diode LED 1 constitute the first optocoupler OC1, the first main electrode of the first controllable silicon SCR 1 with
The third main electrode of second controllable silicon SCR 2 is connected, the control of the second main electrode of the first controllable silicon SCR 1 and the second controllable silicon SCR 2
System is extremely connected, and the 4th main electrode of the third main electrode of the second controllable silicon SCR 2 and the second controllable silicon SCR 2 is logical respectively as first
Electric end ACN and the second energization end ACL.
Specifically, the first Light-emitting diode LED 1 can emit beam when receiving amplified drive signal, and first can
Control silicon SCR1 just will produce photoelectric current after receiving the light that the first Light-emitting diode LED 1 is sent out so that the first controllable silicon SCR 1
The first main electrode and the conducting of the second main electrode, the third main electrode and the 4th main electrode of the second controllable silicon SCR 2 be also switched on, this
Sample so that the control pole of the second controllable silicon SCR 2 is triggered, and the first controllable silicon SCR 1 and the second controllable silicon SCR 2 are both turned on, then
First energization end ACN of controllable controllable silicon drive circuit 10 is connected with the second energization end ACL, and power supply is made to add to PTC electricity
Hot device power supply.
In one embodiment of the invention, as shown in Figure 1, zero cross detection circuit 30 includes：First diode D1, the 4th
Resistance R4, the second optocoupler OC2, the 5th resistance R5, the second diode D2, the 6th resistance R6, the 7th resistance R7 and the first capacitance C1.
Wherein, the anode tap of the first diode D1 is as zero cross signal input terminal；One end of 4th resistance R4 is with the first diode D1's
Cathode is connected；Second optocoupler OC2 includes the second Light-emitting diode LED 2 and the first phototriode VT1, the second light emitting diode
The anode and cathode of LED2 is respectively as the first input end and the second input terminal of the second optocoupler OC2, the first phototriode VT1
Collector and emitter respectively as the second optocoupler OC2 the first output end and second output terminal, the second of the second optocoupler OC2
Input terminal is connected with the other end ACL1 for being input to electrical equipment power supply；5th resistance R5 and the second diode D2 parallel connections connect
It is connected between the first input end and the second input terminal of the second optocoupler OC2；The of one end of 6th resistance R6 and the second optocoupler OC2
One output end is connected, and the other end of the 6th resistance R6 is connected to the first DC power supply VDD；One end of 7th resistance R7 and the second light
The first output end of coupling OC2 is connected, and the other end of the 7th resistance R7 is as zero cross signal test side ZERO_DRIVE；First capacitance
One end of C1 is connected with the other end of the 7th resistance R7, the second output terminal of the other end of the first capacitance C1 and the second optocoupler OC2
It is connected, and the other end of the first capacitance C1 is grounded GND.
Specifically, temperature protection switch 20 in the closure state, electrical equipment power supply is in power supply state,
One diode D1 conductings, the second Light-emitting diode LED 2 emit beam after connecting electrical equipment power supply, and first photosensitive three
Pole pipe VT1 is connected after receiving the light that the second Light-emitting diode LED 2 is sent out, and is believed by the zero passage of zero cross detection circuit 30
Number test side ZERO_DRIVE detects that zero cross signal, the i.e. circuit of zero cross detection circuit 30 are in closed state.Add in PTC electricity
When the heating temperature of hot device is more than preset temperature threshold, break-off signal protects switch 20 so that electrical equipment power supply is in
Off-position, the second Light-emitting diode LED 2 can not emit beam after the power supply for disconnecting electrical equipment, and first is photosensitive
Triode VT1 cannot also be connected, and can not be examined by the zero cross signal test side ZERO_DRIVE of zero cross detection circuit 30
Zero cross signal is measured, i.e. the circuit of zero cross detection circuit 30 is off.
Fig. 2 is the flow chart of the PTC electric heater control method according to an embodiment of the invention for electrical equipment,
As shown in Fig. 2, this method specifically may include following steps：
S101, initialization.
S102 controls whether the zero cross signal test side that chip detects zero cross detection circuit has zero cross signal by MCU.Such as
Fruit is to execute step S103；If not, executing step S104.
S103 controls chip by MCU and judges whether to need to open PTC electric heater.If so, executing step S105；
If not, executing step S106.
S104, closing function load, and return to step S102.
S105 opens PTC electric heater.
S106 controls chip by MCU and judges whether that open function is needed to load.If so, executing step S107；If
It is no, return to step S104.
S107, open function load, and return to step S102.
In conclusion the PTC electric heater control circuit according to the ... of the embodiment of the present invention for electrical equipment, passes through zero passage
Detection circuit is detected the zero cross signal of power supply, when zero cross detection circuit detects zero cross signal, passes through control
Module judges that often the temperature protection switch in closed state is in closed state, is more than in the heating temperature of PTC electric heater
Break-off signal protection switch needs unlatching PTC electrical heating to carry out temperature protection, and in electrical equipment when preset temperature threshold
When device, by the drive control end output drive signal of control module to control the first energization end of controllable silicon drive circuit and the
Two energization ends are connected, so that power supply is powered to PTC electric heater.The circuit can be realized rapidly and reliably to PTC electricity
The control of heater can be effectively prevented from security risk, and the control port by connecting less control module, can
Reduce the occupancy of resource.
Based on above-described embodiment, the embodiment of the present invention also proposed a kind of electrical equipment 1000.
Fig. 3 is the block diagram of electrical equipment according to the ... of the embodiment of the present invention.As shown in figure 3, the embodiment of the present invention
Electrical equipment 1000 includes the above-mentioned PTC electric heater control circuit 100 for electrical equipment.
It should be noted that undisclosed details in the electrical equipment 100 of the embodiment of the present invention, please refers to implementation of the present invention
Details disclosed in the PTC electric heater control circuit 100 for electrical equipment of example, specific I will not elaborate.
Electrical equipment according to the ... of the embodiment of the present invention controls electricity using the above-mentioned PTC electric heater for electrical equipment
Road can rapidly and reliably realize the control to PTC electric heater, can be effectively prevented from security risk, and pass through company
The control port of less control module is connect, the occupancy of resource can be reduced.
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 ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply 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 this feature.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；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
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 can be with "above" or "below" second feature
It is that the first and second features are in direct 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
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is 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 embodiments or example.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, changes, replacing and modification.
Claims (9)
1. a kind of PTC electric heater control circuit for electrical equipment, which is characterized in that including：
Controllable silicon drive circuit, the controllable silicon drive circuit include the first energization end, the second energization end and drive control end；
Temperature protection switch, one end of the temperature protection switch are connected with the one end for the power supply for being input to electrical equipment,
The other end of the temperature protection switch is connected with the first energization end of the controllable silicon drive circuit, and the temperature protection is opened
There is first node, wherein the temperature protection switch is in normal closed form between the other end of pass and first energization end
State, and disconnected when the heating temperature of PTC electric heater is more than preset temperature threshold to carry out temperature protection；
Zero cross detection circuit, the zero cross detection circuit include zero cross signal input terminal and zero cross signal test side, the zero passage
Signal input part is connected with the first node, and the zero cross detection circuit is used to carry out the zero cross signal of the power supply
Detection；
Control module, the control module are electric with the drive control end of the controllable silicon drive circuit and the zero passage detection respectively
The zero cross signal test side on road is connected, and the control module is used to detect the zero passage detection by the zero cross signal test side
Whether circuit detects the zero cross signal, and when the zero cross detection circuit detects the zero cross signal, described in judgement
Temperature protection switch is in closed state, and when the electrical equipment needs to open the PTC electric heater, by described
Drive control end output drive signal is connected with the first energization end for controlling the controllable silicon drive circuit with the second energization end, with
The power supply is set to power to the PTC electric heater.
2. the PTC electric heater control circuit according to claim 1 for electrical equipment, which is characterized in that the control
Molding block is additionally operable to after judging that the temperature protection switch is in closed state, and the work(according to the electrical equipment is portative
Function load described in demand control is opened to open.
3. the PTC electric heater control circuit according to claim 2 for electrical equipment, which is characterized in that the control
Molding block is additionally operable to, when the zero cross signal is not detected in the zero cross detection circuit, judge that the temperature protection switch is in
Off-state, and directly control the function load and close.
4. the PTC electric heater control circuit according to claim 1 for electrical equipment, which is characterized in that it is described can
It includes drive signal amplifying unit and silicon-controlled unit to control silicon driving circuit.
5. the PTC electric heater control circuit according to claim 4 for electrical equipment, which is characterized in that the drive
Dynamic signal amplification unit includes：
First resistor, the drive control end of one end of the first resistor as the controllable silicon drive circuit；
The base stage of first triode, first triode is connected with the other end of the first resistor, and the one or three pole
The emitter of pipe is grounded；
Second resistance, the second resistance are connected in parallel between the base stage and emitter of first triode；
3rd resistor, one end of the 3rd resistor are connected with the collector of first triode, the 3rd resistor it is another
Amplify output end as the signal of the drive signal amplifying unit in one end.
6. the PTC electric heater control circuit according to claim 5 for electrical equipment, which is characterized in that it is described can
Controlling silicon unit includes：
First light emitting diode, the cathode of first light emitting diode and the signal amplification of the drive signal amplifying unit are defeated
Outlet is connected, and the anode of first light emitting diode is connected to the first DC power supply；
First is silicon-controlled and second is silicon-controlled, wherein described first silicon-controlled and described first light emitting diode constitutes the first light
Coupling, described first the first silicon-controlled main electrode are connected with the described second silicon-controlled third main electrode, and described first is silicon-controlled
The second main electrode be connected with the described second silicon-controlled control pole, the described second silicon-controlled third main electrode and described second
The 4th silicon-controlled main electrode is respectively as first energization end and second energization end.
7. the PTC electric heater control circuit for electrical equipment according to any one of claim 1-6, feature exist
In the zero cross detection circuit includes：
First diode, the anode tap of first diode is as the zero cross signal input terminal；
One end of 4th resistance, the 4th resistance is connected with the cathode of first diode；
Second optocoupler, second optocoupler include the second light emitting diode and the first phototriode, wherein described second shines
The anode and cathode of diode respectively as second optocoupler first input end and the second input terminal, described first photosensitive three
First output end and second output terminal of the collector and emitter of pole pipe respectively as second optocoupler, wherein described
Second input terminal of two optocouplers is connected with the other end for being input to power supply described in the electrical equipment；
5th resistance and the second diode, the 5th resistance and second diodes in parallel are connected to second optocoupler
Between first input end and the second input terminal；
One end of 6th resistance, the 6th resistance is connected with the first output end of second optocoupler, the 6th resistance
The other end is connected to the first DC power supply；
One end of 7th resistance, the 7th resistance is connected with the first output end of second optocoupler, the 7th resistance
The other end is as the zero cross signal test side；
First capacitance, one end of first capacitance are connected with the other end of the 7th resistance, first capacitance it is another
End is connected with the second output terminal of second optocoupler, and the other end ground connection of first capacitance.
8. the PTC electric heater control circuit according to claim 2 for electrical equipment, which is characterized in that the electricity
Device equipment is facial vaporizer, and the function load includes anion generator and/or atomizer.
9. a kind of electrical equipment, which is characterized in that include being used for electrical equipment according to any one of claim 1-8
PTC electric heater control circuit.
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| CN201710098306.9A CN106681397B (en) | 2017-02-22 | 2017-02-22 | Electrical equipment and PTC electric heater control circuit for it |
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| CN201710098306.9A CN106681397B (en) | 2017-02-22 | 2017-02-22 | Electrical equipment and PTC electric heater control circuit for it |
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| CN106681397B true CN106681397B (en) | 2018-10-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436577B (en) * | 2017-08-08 | 2023-05-23 | 珠海格力电器股份有限公司 | Power control circuit and method based on zero-crossing detection |
| CN108449809A (en) * | 2018-03-26 | 2018-08-24 | 珠海格力电器股份有限公司 | Electric heating control circuit and air conditioner |
| CN111374528B (en) * | 2018-12-29 | 2022-02-11 | 广东美的白色家电技术创新中心有限公司 | Electric rice cooker |
| CN110187656B (en) * | 2019-05-16 | 2020-10-16 | 浙江大学 | Electrical appliance with timing function by means of WiFi plug-in |
| CN112595951B (en) * | 2020-10-29 | 2024-10-11 | 华帝股份有限公司 | Compatible detection circuit and zero-crossing detection, gate detection and power failure memory detection method thereof |
| CN112616200B (en) * | 2020-12-08 | 2022-11-29 | 德阳智科电子有限公司 | Current-limiting starting control system for PTC heater |
| CN112600161B (en) * | 2020-12-29 | 2023-07-25 | 小熊电器股份有限公司 | Silicon controlled rectifier high temperature protection device and circuit control system |
| CN113934242B (en) * | 2021-10-08 | 2023-08-18 | 冠州科技(广州)有限公司 | Heating control device and heating system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201039115Y (en) * | 2007-04-09 | 2008-03-19 | 天津市神鼎电子技术有限公司 | Intelligent electronic compound switch |
| CN201177768Y (en) * | 2007-12-19 | 2009-01-07 | 白勇 | Thermostatic control apparatus for electric water heater |
| CN101592962A (en) * | 2009-05-06 | 2009-12-02 | 宁波锦春电器有限公司 | A kind of temperature control equipment of PTC/NTC electric heating element |
| CN102157910A (en) * | 2010-12-24 | 2011-08-17 | 深圳和而泰智能控制股份有限公司 | Detection device and method as well as loads using detection device or method |
| CN102247640A (en) * | 2010-03-17 | 2011-11-23 | 欧姆龙健康医疗事业株式会社 | Atomization device |
| CN202513549U (en) * | 2012-04-05 | 2012-10-31 | 厦门瑞尔特卫浴科技股份有限公司 | Abnormality protection device of warm water squatting pan |
| CN205405287U (en) * | 2016-03-08 | 2016-07-27 | 无锡市国瑞热控电气有限公司 | PTC soft start temperature controller |
-
2017
- 2017-02-22 CN CN201710098306.9A patent/CN106681397B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201039115Y (en) * | 2007-04-09 | 2008-03-19 | 天津市神鼎电子技术有限公司 | Intelligent electronic compound switch |
| CN201177768Y (en) * | 2007-12-19 | 2009-01-07 | 白勇 | Thermostatic control apparatus for electric water heater |
| CN101592962A (en) * | 2009-05-06 | 2009-12-02 | 宁波锦春电器有限公司 | A kind of temperature control equipment of PTC/NTC electric heating element |
| CN102247640A (en) * | 2010-03-17 | 2011-11-23 | 欧姆龙健康医疗事业株式会社 | Atomization device |
| CN102157910A (en) * | 2010-12-24 | 2011-08-17 | 深圳和而泰智能控制股份有限公司 | Detection device and method as well as loads using detection device or method |
| CN202513549U (en) * | 2012-04-05 | 2012-10-31 | 厦门瑞尔特卫浴科技股份有限公司 | Abnormality protection device of warm water squatting pan |
| CN205405287U (en) * | 2016-03-08 | 2016-07-27 | 无锡市国瑞热控电气有限公司 | PTC soft start temperature controller |
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