CN208705395U - Zero-crossing detection circuit, drive circuit and food processor - Google Patents
Zero-crossing detection circuit, drive circuit and food processor Download PDFInfo
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- CN208705395U CN208705395U CN201820296794.4U CN201820296794U CN208705395U CN 208705395 U CN208705395 U CN 208705395U CN 201820296794 U CN201820296794 U CN 201820296794U CN 208705395 U CN208705395 U CN 208705395U
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 235000013305 food Nutrition 0.000 title abstract description 3
- 238000010411 cooking Methods 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Cookers (AREA)
Abstract
The application provides zero cross detection circuit, drive circuit and cooking machine. The zero-crossing detection circuit includes a waveform conversion circuit and a controller. The waveform conversion circuit is connected with the mains supply and converts the waveform of the mains supply into square waves. The controller is electrically connected with the waveform conversion circuit, receives the square waves output by the waveform conversion circuit, and determines the zero crossing point of the commercial power according to the square waves. The drive circuit includes a zero-crossing detection circuit. The food processor comprises a driving circuit.
Description
Technical field
This application involves small household appliances field more particularly to a kind of zero cross detection circuits, driving circuit and cooking machine.
Background technique
With the increasingly raising of people's living standard, occur many different types of cooking machines in the market.Cooking machine
Function mainly may include, but be not limited to, and beats soya-bean milk, squeezed juice, cooks rice paste, meat cutter, water ice, coffee processed and/or allotment face
The functions such as film.The driving circuit of cooking machine often uses silicon-controlled device driving motor or heating dish.Because of silicon-controlled device zero passage itself
The characteristic of shutdown needs accurately to detect the zero crossing of alternating current.
Utility model content
The application provides a kind of zero cross detection circuit, driving circuit and cooking machine, can accurately detect alternating current zero crossing.
The one aspect of the application provides a kind of zero cross detection circuit, comprising: waveform changing circuit connects alternating current, by city
The waveform of electricity is converted into square wave；And controller, it is electrically connected with the waveform changing circuit, receives the waveform changing circuit output
Square wave, the zero crossing of the alternating current is determined according to the square wave.
Further, the waveform changing circuit includes the diode for connecting alternating current, and the diode is by the alternating current
Waveform is converted into half-wave.
Further, the anode of the diode is electrically connected to firewire.
Further, the waveform changing circuit include triode and be electrically connected to the triode and the diode it
Between several divider resistances, the triode is electrically connected with the controller, the half-wave is converted into the square wave and is supplied to
The controller.
Further, the triode includes NPN type triode, and the base stage of the triode is connected to the diode
Cathode, collector are connected to the controller and ground connection, and emitter connects low level.
Further, several divider resistances include being series between the base stage of the triode and the diode
Current-limiting resistance, and the conducting resistance being parallel between the base stage and emitter of the triode.
Further, the zero cross detection circuit includes the Switching Power Supply for connecting alternating current and the controller, the switch
Alternating current is converted to direct current and is supplied to the controller by power supply.
Further, the Switching Power Supply includes ground terminal and DC output end, and the controller includes power end and ground connection
End, the power end of the controller are electrically connected to the ground terminal of the Switching Power Supply, and the ground terminal is connected to zero curve, institute
The ground terminal for stating controller is electrically connected to the DC output end of the Switching Power Supply.
Further aspect of the application provides a kind of driving circuit, comprising: silicon-controlled device；And zero cross detection circuit, institute
It states zero cross detection circuit to be electrically connected with the silicon-controlled device, the controller controls the silicon-controlled device according to the zero crossing
Part work.
Further aspect of the application provides a kind of cooking machine, comprising: host, including motor and driving circuit, the drive
Dynamic circuit is connect with the motor, and the motor is driven to rotate；And stirring cup assembly, it is removably installed on the host.
Further aspect of the application provides a kind of cooking machine, comprising: host, including motor and driving circuit；Stirring cup
Component is removably installed on the host；And heating dish, it is set to the bottom of the stirring cup assembly, with the driving
Circuit electrical connection, the driving circuit drive the heating dish.
The waveform of alternating current is converted into the identifiable square wave of controller by the application waveform changing circuit, and controller is according to square wave
It determines the zero crossing of alternating current, so realizes accurately alternating current zero-crossing examination.
Detailed description of the invention
Fig. 1 show the circuit diagram of one embodiment of the application zero cross detection circuit；
Fig. 2 show the waveform diagram of one embodiment of two o'clock in zero cross detection circuit shown in FIG. 1；
Fig. 3 show the flow chart that the application zero crossing determines one embodiment of method；
Fig. 4 show the sectional view of one embodiment of the application cooking machine.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device of some aspects be described in detail in claims, the application.
It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application.
Unless otherwise defined, technical term or scientific term used in this application, which are should be in fields of the present invention, has general skill
The ordinary meaning that the personage of energy is understood." first " " second " and class used in present specification and claims
As word be not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.Equally, " one
It is a " or the similar word such as " one " do not indicate that quantity limits yet, but indicate that there are at least one." multiple " or " several " table
Show two and two or more.The similar word such as " comprising " or "comprising" means to appear in the member before " comprising " or "comprising"
Part or object are covered the element for appearing in " comprising " or "comprising" presented hereinafter or object and its are equal, it is not excluded that its
His element or object." connection " either the similar word such as " connected " is not limited to physics or mechanical connection, and
And may include electrical connection, it is either direct or indirect.In present specification and the appended claims
The "an" of used singular, " described " and "the" are also intended to including most forms, unless context clearly shows that
Other meanings.It is also understood that term "and/or" used herein refers to and includes one or more associated to list item
Purpose any or all may combine.
The zero cross detection circuit of the embodiment of the present application includes waveform changing circuit and controller.Waveform changing circuit connects city
The waveform of alternating current is converted into square wave by electricity.Controller is electrically connected with waveform changing circuit, receives the side of waveform changing circuit output
Wave determines the zero crossing of alternating current according to square wave.The waveform of alternating current is converted into the identifiable square wave of controller by waveform changing circuit,
Controller determines the zero crossing of alternating current according to square wave, so realizes accurately alternating current zero-crossing examination.
Fig. 1 show the circuit diagram of one embodiment of zero cross detection circuit 10.Zero cross detection circuit 10 is for detecting city
The zero crossing of electricity.Zero cross detection circuit 10 includes waveform changing circuit 11 and controller 12.Zero cross detection circuit 10 further includes connecting
Connect the Switching Power Supply 13 of alternating current and controller 12.
Waveform changing circuit 11 connects alternating current, and the waveform of alternating current is converted into square wave.The waveform of alternating current is sine wave.Waveform
Conversion circuit 11 includes the diode D1 of connection alternating current, and the waveform of alternating current is converted into half-wave by diode D1.Diode D1 is just
Pole is electrically connected to firewire L.As shown in Fig. 2, in Fig. 1 A point (i.e. at diode D1 cathode) voltage waveform be positive half period just
The negative half-cycle of string wave, alternating current is fallen by diode-isolated.
Continue to refer to figure 1, waveform changing circuit 11 include triode Q1 and be electrically connected to triode Q1 and diode D1 it
Between several divider resistance R1-R3.Triode Q1 is electrically connected with controller 12, and half-wave is converted into square wave and is supplied to controller
12.In the illustrated embodiment, triode Q1 includes NPN type triode, and the base stage of triode Q1 is connected to the cathode of diode D1,
Collector is connected to controller 12 and is grounded, and emitter connects low level.In one embodiment, several divider resistance R1-R3 packets
Include the current-limiting resistance R1 and R2 between the base stage for being series at triode Q1 and diode D1, and be parallel to triode Q1 base stage and
Conducting resistance R3 between emitter.Current-limiting resistance R1 and R2 can be the big resistance of hundred kilohms of ranks, such as 330 kilo-ohms
Resistance, the electric current in circuit where limitation.The voltage turn-on triode Q1 at the both ends conducting resistance R3.The resistance value of conducting resistance R3 relatively limits
The resistance value of leakage resistance R1 and R2 are small, such as the resistance that conducting resistance R3 is 10 kilo-ohms.
In conjunction with reference Fig. 2, the voltage waveform of B point (i.e. at the collector of triode Q1) is square wave in Fig. 1.The voltage of A point
Cyclically-varying, therefore triode Q1 is periodically connected.When the voltage value of A point is higher than a threshold value, the both ends conducting resistance R3
Voltage triode Q1 is connected, B point is connected to low level, such as -5V, and B point voltage is low level at this time.When the voltage of A point
When value is lower than above-mentioned threshold value, it is high level that the voltage of triode Q1 cut-off, B point is acted on by the pull-up of pull-up resistor R4.B point
Square wave is supplied to controller 12.
Controller 12 is electrically connected with waveform changing circuit 11, the square wave that waveform changing circuit 11 exports is received, according to square wave
Determine the zero crossing of alternating current.Controller 12 can identify square wave, and the waveform of square wave is relatively regular, and controller 12 can be easier to and standard
Really determine alternating current zero crossing, avoid controller directly be electrically connected with city reading level change and determination zero crossing error compared with
Big problem, and reduce the probability of controller damage.And cost is relatively low for the zero cross detection circuit 10.Controller 12 can wrap
Include single-chip microcontroller or other microprocessors.
Alternating current is converted to direct current and is supplied to controller 12 by Switching Power Supply 13.Switching Power Supply 13 includes that ground terminal and direct current are defeated
Outlet, ground terminal are connected to zero curve N.Ground terminal of the zero curve N as Switching Power Supply 13, the voltage of power output end output are low level,
Such as -5V.Controller 12 includes power end VCC and ground terminal GND, and the power end VCC of controller 12 is electrically connected to Switching Power Supply
13 ground terminal, such power end VCC are connected directly to zero curve N.The ground terminal GND of controller 12 is electrically connected to Switching Power Supply 13
DC output end, ground terminal GND connection low level.The direct current of Switching Power Supply 13 is also provided to waveform changing circuit 11.Three poles
The DC output end of the emitter connection switch power supply 13 of pipe Q1, collector are connected to Switching Power Supply 13 by pull-up resistor R4
Ground terminal.
The zero crossing that Fig. 3 show the execution of controller 12 determines the flow chart of one embodiment of method 300.Zero crossing is true
Determining method 300 includes step 311-319.In step 311, square wave is received.Controller 12 receives waveform changing circuit 11 and exports
Square wave.
In step 312, the low level duration T1 and high level lasting time T2 in square wave a cycle is determined, in conjunction with
With reference to Fig. 2.In one embodiment, high level lasting time T1 and low electricity can be determined by the timer internal of controller 12
Flat duration T 2.
In step 313, alternating current peak point is determined.It calculates and obtains T1/2 and T2/2, be that two neighboring peak point is corresponding
Time so determines alternating current peak point, and records alternating current peak point.In a step 314, the time of two neighboring peak point is determined
It is spaced T, and determines T/2.Peak point T1/2 is delayed the T/2 time as zero crossing Z1.Peak point T2/2 is delayed the T/2 time as zero crossing
Z2.Time interval T and T/2 can be obtained by calculating.
When next cycle reaches, after detecting peak point, the delay T/2 time is alternating current zero crossing.In step 315
In, when detecting the square wave of next cycle, the variation of decision level.Judge that level is lower by height in step 315, records
The level change time is used for step 312.In step 316, the delay T1/2 time obtains peak point, is low level peak point.?
In step 317, the peak point delay T/2 time obtains alternating current zero crossing Z3.
Similar to step 315, in step 318, judge that level is got higher by low, recording level transformation period is used for step
312.Similar to step 316, in step 319, the delay T2/2 time obtains peak point, is the peak point of high level.Into step
Rapid 317, the peak point delay T/2 time obtains alternating current zero crossing.
The application driving circuit includes silicon-controlled device and above-mentioned zero cross detection circuit 10.Zero cross detection circuit 10 and controllable
Silicon device electrical connection.Controller 12 controls silicon-controlled device work according to zero crossing.Silicon-controlled device is closed in alternating current zero crossing
Disconnected, zero cross detection circuit 10 detects that zero crossing, controller 12 can postpone to be closed silicon-controlled device for a period of time after zero crossing
Part.It can postpone the different time according to practical application.Silicon-controlled device may include bidirectional triode thyristor device.
Fig. 4 show the sectional view of the cooking machine 40 of one embodiment.Cooking machine 40 includes host 41 and stirring cup assembly
42.Host 41 includes motor 43 and above-mentioned driving circuit, and driving circuit is connect with motor 43, and driving motor 43 rotates.Controller
The revolving speed that the 12 time differences postponed after zero crossing can control motor 43 is different.
Stirring cup assembly 42 is removably installed on host 41.Cooking machine 40, which may also include, can cover in stirring cup assembly 42
On cup lid component 44 and be set to stirring cup assembly 42 in mixing blade assembly 45.Motor 43 drives 45 turns of mixing blade assembly
It is dynamic, beat food materials.
In one embodiment, cooking machine 40 includes heating dish 46, is set to the bottom of stirring cup assembly 42, with driving electricity
Road electrical connection, driving circuit drive heating dish 46 to generate heat.In one embodiment, cooking machine 40 may include two driving electricity
Road respectively drives motor 43 and heating dish 46.The subelement for the driving circuit for driving heating dish 46 to generate heat and driving motor 43
Driving circuit subelement it is different.Fig. 4 is only a schematical example, however it is not limited to cooking machine 40 shown in Fig. 4.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (10)
1. a kind of driving circuit, characterized in that it comprises:
Silicon-controlled device；And
Zero cross detection circuit (10), the zero cross detection circuit (10) are electrically connected with the silicon-controlled device, the zero passage detection
Circuit (10) includes:
Waveform changing circuit (11) connects alternating current, the waveform of alternating current is converted into square wave；And
Controller (12) is electrically connected with the waveform changing circuit (11), receives the side of the waveform changing circuit (11) output
Wave, the zero crossing of the alternating current is determined according to the square wave, and the controller (12) is described controllable according to zero crossing control
Silicon device work.
2. driving circuit as described in claim 1, it is characterised in that: the waveform changing circuit (11) includes connection alternating current
The waveform of the alternating current is converted into half-wave by diode (D1), the diode (D1).
3. driving circuit as claimed in claim 2, it is characterised in that: the anode of the diode (D1) is electrically connected to firewire
(L)。
4. driving circuit as claimed in claim 2, it is characterised in that: the waveform changing circuit (11) includes triode (Q1)
And several divider resistances (R1-R3) being electrically connected between the triode (Q1) and the diode (D1), the triode
(Q1) it is electrically connected with the controller (12), the half-wave is converted into the square wave and is supplied to the controller (12).
5. driving circuit as claimed in claim 4, it is characterised in that: the triode (Q1) includes NPN type triode, described
The base stage of triode (Q1) is connected to the cathode of the diode (D1), and collector is connected to the controller (12) and is grounded,
Emitter connects low level.
6. driving circuit as claimed in claim 5, it is characterised in that: several divider resistances (R1-R3) include being series at
Current-limiting resistance (R1, R2) between the base stage and the diode (D1) of the triode (Q1), and it is parallel to the triode
(Q1) conducting resistance (R3) between base stage and emitter.
7. driving circuit as described in claim 1, it is characterised in that: the zero cross detection circuit includes connection alternating current and described
Alternating current is converted to direct current and is supplied to the controller by the Switching Power Supply (13) of controller (12), the Switching Power Supply (13)
(12)。
8. driving circuit as claimed in claim 7, it is characterised in that: the Switching Power Supply (13) includes ground terminal and direct current output
End, the controller (12) includes power end (VCC) and ground terminal (GND), the power end (VCC) of the controller (12)
Be electrically connected to the ground terminal of the Switching Power Supply (13), the ground terminal is connected to zero curve (N), the controller (12) it is described
Ground terminal (GND) is electrically connected to the DC output end of the Switching Power Supply (13).
9. a kind of cooking machine, it is characterised in that: comprising:
Host (41), including motor (43) and the described in any item driving circuits of claim 1-8, the driving circuit with it is described
Motor (43) connection, drives the motor (43) to rotate；And
It stirs cup assembly (42), is removably installed on the host (41).
10. a kind of cooking machine, it is characterised in that: comprising:
Host (41), including motor (43) and the described in any item driving circuits of claim 1-8；
It stirs cup assembly (42), is removably installed on the host (41)；And
Heating dish (46) is set to the bottom of stirring cup assembly (42), is electrically connected with the driving circuit, the driving electricity
Road drives the heating dish (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820296794.4U CN208705395U (en) | 2018-03-02 | 2018-03-02 | Zero-crossing detection circuit, drive circuit and food processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820296794.4U CN208705395U (en) | 2018-03-02 | 2018-03-02 | Zero-crossing detection circuit, drive circuit and food processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208705395U true CN208705395U (en) | 2019-04-05 |
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ID=65913262
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820296794.4U Active CN208705395U (en) | 2018-03-02 | 2018-03-02 | Zero-crossing detection circuit, drive circuit and food processor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108928A (en) * | 2019-05-23 | 2019-08-09 | 九阳股份有限公司 | A kind of alternating voltage zero-crossing detection method based on ac voltage detection circuit |
| CN110749770A (en) * | 2019-06-25 | 2020-02-04 | 深圳市聚芯影像有限公司 | Commercial power detection sampling circuit |
| CN110780109A (en) * | 2019-11-13 | 2020-02-11 | 小熊电器股份有限公司 | Resistive load detection circuit and detection method |
| CN114001509A (en) * | 2020-07-28 | 2022-02-01 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting control method |
-
2018
- 2018-03-02 CN CN201820296794.4U patent/CN208705395U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108928A (en) * | 2019-05-23 | 2019-08-09 | 九阳股份有限公司 | A kind of alternating voltage zero-crossing detection method based on ac voltage detection circuit |
| CN110108928B (en) * | 2019-05-23 | 2021-04-09 | 九阳股份有限公司 | Alternating voltage zero-crossing detection method based on alternating voltage detection circuit |
| CN110749770A (en) * | 2019-06-25 | 2020-02-04 | 深圳市聚芯影像有限公司 | Commercial power detection sampling circuit |
| CN110780109A (en) * | 2019-11-13 | 2020-02-11 | 小熊电器股份有限公司 | Resistive load detection circuit and detection method |
| CN114001509A (en) * | 2020-07-28 | 2022-02-01 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting control method |
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