CN106602966A - Electric cooking appliance and control circuit thereof - Google Patents
Electric cooking appliance and control circuit thereof Download PDFInfo
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- CN106602966A CN106602966A CN201510675346.6A CN201510675346A CN106602966A CN 106602966 A CN106602966 A CN 106602966A CN 201510675346 A CN201510675346 A CN 201510675346A CN 106602966 A CN106602966 A CN 106602966A
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- cooking appliance
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Abstract
The invention discloses a control circuit for an electric cooking appliance and the electric cooking appliance with the control circuit. The control circuit comprises a first conversion circuit whose input end is connected with an external alternating current power supply to convert the alternating current provided by the external alternating current power supply into constant voltage direct current; and an inverter whose input end is connected with the output end of the first conversion circuit and whose output end is connected with a motor to convert the constant voltage direct current into constant alternating current for the motor so that the motor could run at constant speed. The circuit of the invention is capable of ensuring that the input voltage of an electric cooking appliance does not fluctuate according to the alternating current so as to ensure that the motor runs at constant speed and that the performances of the entire equipment do not vary largely.
Description
Technical field
The present invention relates to household electrical appliance technical field, the control circuit of more particularly to a kind of electrical cooking appliance and a kind of electronic
Cooking apparatus.
Background technology
A kernel component of the motor as electronic class product, it is closely bound up with the performance of product, in electric main
When voltage pulsation is more violent, very negative impact will be produced to overall performance directly.Such as soy bean milk making machine, when motor
When input voltage is higher, more preferably, slag yield is lower, but noise ratio is higher for crushing effect；When input voltage is relatively low,
Although noise is smaller, occur that slag is thick, slag yield is high or even underproof phenomenon.For juice extractor, when
When the input voltage of motor is higher, crushing it is thinner, crushing juice rate is higher；And input voltage it is relatively low when, it may appear that torque
Not enough, cause crushing juice rate low or even stall.In a word, motor input voltage is different, and overall performance there will be very big difference.
In correlation technique, using copped wave He Lost ripple control modes are controlled to motor, adjusted with the rotating speed to motor
Section, but the control mode is generally used only for the startup of controlled motor.And if adopting copped wave Huo Lost ripple control mode controls
Motor continuous firing processed, then when ac commercial power voltage is fluctuated, the equivalent inpnt voltage of motor can change therewith, so as to
Cause motor cannot constant-speed operation, and then cause overall performance widely different.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this purpose, one of the present invention
Purpose is to propose that one kind ensure that motor constant-speed operation, so as to ensure that overall performance will not produce the electronic of larger difference
The control circuit of cooking apparatus.
Further object is that proposing a kind of electrical cooking appliance.
To reach above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of control circuit of electrical cooking appliance, the electricity
Dynamic cooking apparatus is operated by Motor drive, and the control circuit includes：First change-over circuit, first change-over circuit
Input be connected with external communication mains supply, the friendship that the external communication mains supply is provided by first change-over circuit
Stream civil power is converted to constant voltage DC electricity；Inverter, the outfan phase of the input of the inverter and first change-over circuit
Even, the outfan of the inverter is connected with the motor, and the constant voltage DC electricity is converted to alternating constant by the inverter
Electricity to supply the motor so that the motor constant-speed operation.
The control circuit of electrical cooking appliance according to embodiments of the present invention, by control inverter export alternating constant electricity with
Supply motor, makes the input voltage of motor not change with the fluctuation of ac commercial power voltage, so as to ensure that motor is permanent
Speed operation, and then ensure that overall performance will not produce larger difference.
According to one embodiment of present invention, first change-over circuit includes：First rectification unit, the first rectification list
The input of unit is connected with the external communication mains supply, and first rectification unit is carried out at rectification to the electric main
Manage to export the first unidirectional current；First filter unit, the input of first filter unit and first rectification unit
Outfan is connected to be filtered process to first unidirectional current；First pressure unit, the input of first pressure unit
End is connected with the outfan of first filter unit, and the outfan of first pressure unit is used as first change-over circuit
Outfan, first pressure unit to Filtering Processing after the first unidirectional current carry out blood pressure lowering process it is straight to export the constant pressure
Stream electricity.
According to another embodiment of the invention, first change-over circuit includes：Second pressure unit, second blood pressure lowering
The input of unit is connected to carry out blood pressure lowering process to the electric main with the external communication mains supply；Second rectification list
Unit, the input of second rectification unit are connected with the outfan of second pressure unit, second rectification unit pair
Electric main after blood pressure lowering is processed carries out rectification process to export the second unidirectional current；Second filter unit, second filtering are single
The input of unit is connected with the outfan of second rectification unit, and the outfan of second filter unit is used as described first
The outfan of change-over circuit, it is straight to export the constant pressure that second filter unit is filtered process to second unidirectional current
Stream electricity.
According to one embodiment of present invention, the motor is alternating current generator.
According to another embodiment of the invention, when the motor is direct current generator, the control circuit is also whole including the 3rd
Stream unit, the 3rd rectification unit are connected between the outfan of the inverter and the direct current generator, and the described 3rd is whole
Stream unit carries out rectification to the alternating constant electricity and is processed for the direct current generator.
In some embodiments of the invention, the voltage of the constant voltage DC electricity is 5V, 12V, 24V, 36V or 48V.
According to one embodiment of present invention, the inverter is specifically included carries out process of boosting to the constant voltage DC electricity
DC-DC boosting units and the constant voltage DC electricity after processing to boosting carry out the DC-AC converter units of voltage transformation.
According to one embodiment of present invention, the control circuit of above-mentioned electrical cooking appliance, also include by operation display unit,
The auxiliary circuit of communication unit and detector unit composition, the auxiliary circuit are powered by constant voltage DC electricity.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of electrical cooking appliance, and which includes above-mentioned electricity
The control circuit of dynamic cooking apparatus.
Control circuit of the electrical cooking appliance of the embodiment of the present invention by above-mentioned electrical cooking appliance, can make the defeated of motor
Enter voltage to change with the fluctuation of ac commercial power voltage, so as to ensure motor constant-speed operation, and then ensure whole machine
Performance will not produce larger difference.
In some embodiments of the invention, the electrical cooking appliance includes soy bean milk making machine, juice extractor.
Description of the drawings
Fig. 1 is the structural representation of the control circuit of electrical cooking appliance according to an embodiment of the invention.
Fig. 2 is the structural representation of the control circuit of electrical cooking appliance in accordance with another embodiment of the present invention.
Fig. 3 is the electrical block diagram of inverter according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein identical from start to finish
Or similar label represents same or similar element or the element with same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
With reference to the accompanying drawings describing the control circuit of the electrical cooking appliance of proposition according to embodiments of the present invention and electronic cook
Prepare food utensil.
Fig. 1 is the structural representation of the control circuit of electrical cooking appliance according to an embodiment of the invention, wherein,
Electrical cooking appliance is operated by Motor drive, and electrical cooking appliance can be soy bean milk making machine, juice extractor etc..Such as Fig. 1
Shown, the control circuit of the electrical cooking appliance includes：First change-over circuit 10 and inverter 20.
Wherein, the input of the first change-over circuit 10 is connected with external communication mains supply 30, the first change-over circuit 10
The electric main that external communication mains supply 30 is provided is converted to into constant voltage DC electricity, the input of inverter 20 and the
The outfan of one change-over circuit 10 is connected, and the outfan of inverter 20 is connected with motor, and inverter 20 is by constant voltage DC
Electricity is converted to alternating constant electricity to supply motor, so that motor constant-speed operation.
Specifically, a kernel component of the motor as electronic class product, closely bound up with the performance of product, but
Due to provincialism electricity consumption difference, especially proximate to power distribution station or the area of large-scale electric equipment, voltage ripple of power network compares
Greatly, so as to causing the ac commercial power voltage used by user to be fluctuated between 220V ± 10% (i.e. 198V-242V).By
In ac commercial power voltage, fluctuation ratio is more violent, directly will produce very negative impact to overall performance.For example：For bean
For pulp grinder, when the input voltage of the motor in soy bean milk making machine is higher, crushing effect can be more preferable, and slag yield can be lower, but this
When noise it is also higher；And input voltage it is relatively low when, although noise is smaller, but occurs that slag is thick, and slag yield is high very
To underproof phenomenon.For juice extractor, the meeting that the input voltage of the motor in juice extractor is crushed when higher is thinner,
Crushing juice rate is higher；And input voltage it is relatively low when, then the torque of motor output occurs not enough, causes crushing juice rate low even
Stall.In a word, motor input voltage is different, is embodied on overall performance and will result in crushing effect, noise, whole machine
There is very big difference in temperature rise, the formation condition of stall.
In correlation technique, it is powered directly to motor by electric main, and using copped wave He Lost ripple control modes are come right
Controllable silicon in circuit for controlling motor is controlled, to adjust the equivalent inpnt voltage of motor, so as to realize that motor is turned
The regulation of speed, but the control mode is generally used only for the startup of controlled motor, to ensure that motor gently can start,
Occur acutely to shake in avoiding motor start-up procedure.
And if adopting copped wave Huo Lost ripple control mode controlled motor continuous firings, then when ac commercial power voltage is fluctuated,
The equivalent inpnt voltage of motor can change therewith, so as to cause motor cannot constant-speed operation, and then cause overall performance poor
It is different very big, and, chopper control mode can produce very big electromagnetic interference, and Cai Yong Lost ripple control mode controlled motors
During fall-back, motor can occur acutely shake, if motor continuous firing, it is very unfavorable that whole machine temperature rise will be produced
Impact.
For the problems referred to above, embodiments of the invention propose a kind of control circuit of electrical cooking appliance, by control
Inverter output alternating constant electricity makes the input voltage of motor will not be with the fluctuation of ac commercial power voltage supplying motor
And change, to ensure motor constant-speed operation, so as to ensure that overall performance will not produce larger difference.
In one embodiment of the invention, as shown in figure 1, the first change-over circuit 10 includes：First rectification unit 11,
First filter unit 12 and the first pressure unit 13, wherein, input and the external communication city of the first rectification unit 11
Power supply 30 is connected, and the first rectification unit 11 carries out rectification and processes to export the first unidirectional current to electric main, and first
The input of filter unit 12 is connected with the outfan of the first rectification unit 11 to be filtered process to the first unidirectional current,
The input of the first pressure unit 13 is connected with the outfan of the first filter unit 12, the output of the first pressure unit 13
Hold the outfan as the first change-over circuit 10, the first pressure unit 13 to Filtering Processing after the first unidirectional current carry out
Blood pressure lowering processes to export constant voltage DC electricity.
In another embodiment of the present invention, as shown in Fig. 2 the first change-over circuit 10 includes：Second pressure unit
16th, the second rectification unit 17 and the second filter unit 18, wherein, the input of the second pressure unit 16 is handed over outside
Stream mains supply 30 is connected to carry out electric main blood pressure lowering process, the input of the second rectification unit 17 and the second drop
Pressure unit 16 outfan be connected, the second rectification unit 17 to blood pressure lowering process after electric main carry out rectification process with
The second unidirectional current is exported, the input of the second filter unit 18 is connected with the outfan of the second rectification unit 17, second
Outfan of the outfan of filter unit 18 as the first change-over circuit 10, the second the second unidirectional current of filter unit 18 pairs
It is filtered process to export constant voltage DC electricity.
In simple terms, the first change-over circuit 10 has rectification, filtering and buck functionality, for by electric main or without
The high-frequency alternating current of process is converted to constant voltage DC electricity, wherein it is possible to first hand over to electric main or undressed high frequency
Stream electricity carries out rectification to export high voltage direct current, is then filtered process again to remove noise wave removing and do to high voltage direct current
Disturb, it is ensured that high voltage direct current it is clean, high voltage direct current is converted to into the relatively low constant voltage DC of voltage finally by blood pressure lowering
Electricity.It is of course also possible to first carry out blood pressure lowering, then carry out rectification and Filtering Processing again to export constant voltage DC electricity.At this
In some embodiments of invention, the voltage of constant voltage DC electricity can be 5V, 12V, 24V, 36V or 48V, specifically can be with
Determine according to the actual requirements.
In one embodiment of the invention, as shown in figure 1, motor is alternating current generator M1.Due to inverter 20 it is direct
Output alternating constant electricity, meets the voltage request of alternating current generator M1, therefore can directly feed alternating current generator M1.
In another embodiment of the present invention, as shown in Fig. 2 when motor is direct current generator M2, control circuit is also
Including the 3rd rectification unit 40, the 3rd rectification unit 40 is connected between the outfan of inverter 20 and direct current generator M2,
3rd rectification unit 40 carries out rectification and is processed for giving direct current generator M2 to alternating constant electricity.It is understood that the 3rd
Rectification unit 40 may also include voltage reduction module, depending on specifically being required according to the input voltage of direct current generator M2, certainly,
Interlock circuit can be increased also so that the input voltage of direct current generator M2 is more stable.
According to one embodiment of present invention, as shown in Fig. 2 inverter 20 is specifically included that constant voltage DC electricity is risen
DC-DC boosting units 21 and the DC-AC that the constant voltage DC electricity after boosting process carries out voltage transformation is converted that pressure is processed
Constant voltage DC electricity is converted to constant height by DC-DC boosting units 21 and DC-AC converter units 22 by unit 22
Frequency alternating current.As shown in figure 3, DC-DC boosting units 21 can be to push away to exempt from formula DC-DC converter, and adopt PWM
(Pulse Width Modulation, pulse width modulation) control technology, DC-AC converter units 22 can be complete
Bridge DC-AC changers, and adopt SPWM (Sinusoidal Pulse Width Modulation, sinusoid pulse width modulation
Modulation) control technology.
According to one embodiment of present invention, as shown in Fig. 2 the control circuit of above-mentioned electrical cooking appliance also includes
The auxiliary circuit 50 being made up of operation display unit, communication unit and detector unit, auxiliary circuit 50 is by constant voltage DC electricity
Power supply.Auxiliary circuit 50 not only can be monitored to the current operating state of inverter, motor etc., and can be right
The input and output loop of inverter is controlled, to carry out on off control to motor as needed, it is ensured that safety and section
Energy.
The control circuit of electrical cooking appliance according to embodiments of the present invention, by control inverter export alternating constant electricity with
Supply motor, makes the input voltage of motor not change with the fluctuation of ac commercial power voltage, so as to ensure that motor is permanent
Speed operation, and then ensure that overall performance will not produce larger difference.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of electrical cooking appliance, and which includes above-mentioned electricity
The control circuit of dynamic cooking apparatus, electrical cooking appliance can be soy bean milk making machine, juice extractor etc..
Control circuit of the electrical cooking appliance of the embodiment of the present invention by above-mentioned electrical cooking appliance, can make the defeated of motor
Enter voltage to change with the fluctuation of ac commercial power voltage, so as to ensure motor constant-speed operation, and then ensure whole machine
Performance will not produce larger difference.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ",
" outward ", the orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on
Orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplify description, rather than indicate or imply institute
The device or element of finger must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
Bright restriction.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed
Or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two
It is individual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation "
Should be interpreted broadly Deng term, for example, it may be fixedly connected, or be detachably connected, or it is integral；Can be
It is mechanically connected, or electrically connects；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clearly restriction.It is common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or
Oblique upper, or fisrt feature level height is merely representative of higher than second feature.Fisrt feature second feature " under ",
" lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or to be merely representative of first special
Level height is levied less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
Example ", or " some examples " etc. description mean specific features with reference to the embodiment or example description, structure, material or
Feature is contained at least one embodiment or example of the present invention.In this manual, the schematic representation to above-mentioned term
Identical embodiment or example are directed to necessarily.And, the specific features of description, structure, material or feature can be with
Combined in any one or more embodiments or example in an appropriate manner.Additionally, in the case of not conflicting, ability
The feature of the different embodiments or example described in this specification and different embodiments or example can be entered by the technical staff in domain
Row is combined and is combined.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary,
It is not considered as limiting the invention, one of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, changes, replacing and modification.
Claims (10)
1. a kind of control circuit of electrical cooking appliance, it is characterised in that the electrical cooking appliance carries out work by Motor drive
Make, the control circuit includes：
First change-over circuit, the input of first change-over circuit are connected with external communication mains supply, first conversion
The electric main that the external communication mains supply is provided is converted to constant voltage DC electricity by circuit；
Inverter, the input of the inverter are connected with the outfan of first change-over circuit, the output of the inverter
End is connected with the motor, and the constant voltage DC electricity is converted to alternating constant electricity to supply the motor by the inverter, with
Make the motor constant-speed operation.
2. the control circuit of electrical cooking appliance according to claim 1, it is characterised in that first change-over circuit
Including：
First rectification unit, the input of first rectification unit are connected with the external communication mains supply, and described first
Rectification unit carries out rectification and processes to export the first unidirectional current to the electric main；
First filter unit, the input of first filter unit are connected with the outfan of first rectification unit with to institute
State the first unidirectional current and be filtered process；
First pressure unit, the input of first pressure unit are connected with the outfan of first filter unit, described
Outfan of the outfan of the first pressure unit as first change-over circuit, after first pressure unit is to Filtering Processing
The first unidirectional current carry out blood pressure lowering and process to export constant voltage DC electricity.
3. the control circuit of electrical cooking appliance according to claim 1, it is characterised in that first change-over circuit
Including：
Second pressure unit, the input of second pressure unit are connected with the external communication mains supply with to the friendship
Stream civil power carries out blood pressure lowering process；
Second rectification unit, the input of second rectification unit are connected with the outfan of second pressure unit, described
Second rectification unit carries out rectification to the electric main after blood pressure lowering process and processes to export the second unidirectional current；
Second filter unit, the input of second filter unit are connected with the outfan of second rectification unit, described
Outfan of the outfan of the second filter unit as first change-over circuit, second filter unit are straight to described second
Stream electricity is filtered process to export the constant voltage DC electricity.
4. the control circuit of the electrical cooking appliance according to any one of claim 1-3, it is characterised in that the electricity
Machine is alternating current generator.
5. the control circuit of the electrical cooking appliance according to any one of claim 1-3, it is characterised in that when described
When motor is direct current generator, the control circuit also includes the 3rd rectification unit, and the 3rd rectification unit is connected to described inverse
Become device outfan and the direct current generator between, the 3rd rectification unit alternating constant electricity is carried out rectification process with
Supply the direct current generator.
6. the control circuit of the electrical cooking appliance according to any one of claim 1-3, it is characterised in that the perseverance
Galvanic voltage is pressed to be 5V, 12V, 24V, 36V or 48V.
7. the control circuit of electrical cooking appliance according to claim 1, it is characterised in that the inversion implement body bag
Including the constant voltage DC electricity after the DC-DC boosting units of boosting process being carried out to the constant voltage DC electricity and being processed to boosting carries out electricity
The DC-AC converter units that buckling is changed.
8. the control circuit of electrical cooking appliance according to claim 1, it is characterised in that also include being shown by operation
The auxiliary circuit of unit, communication unit and detector unit composition, the auxiliary circuit are powered by constant voltage DC electricity.
9. a kind of electrical cooking appliance, it is characterised in that include the electronic culinary art according to any one of claim 1-8
The control circuit of utensil.
10. electrical cooking appliance according to claim 9, it is characterised in that the electrical cooking appliance includes bean milk
Machine, juice extractor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675346.6A CN106602966A (en) | 2015-10-15 | 2015-10-15 | Electric cooking appliance and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675346.6A CN106602966A (en) | 2015-10-15 | 2015-10-15 | Electric cooking appliance and control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106602966A true CN106602966A (en) | 2017-04-26 |
Family
ID=58554223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510675346.6A Pending CN106602966A (en) | 2015-10-15 | 2015-10-15 | Electric cooking appliance and control circuit thereof |
Country Status (1)
| Country | Link |
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| JPH114596A (en) * | 1997-06-11 | 1999-01-06 | Sharp Corp | Motor drive equipment and air conditioner using this equipment |
| JP2002027787A (en) * | 2000-07-03 | 2002-01-25 | Keyence Corp | Motor driver |
| CN1490929A (en) * | 2002-10-17 | 2004-04-21 | Lg电子株式会社 | Driver of three-phase inductive motor and method thereof |
| US20090153094A1 (en) * | 2007-12-14 | 2009-06-18 | Hanning Elektro-Werke Gmbh & Co. Kg | Drive |
| CN201854231U (en) * | 2010-09-16 | 2011-06-01 | 深圳拓邦股份有限公司 | Direct current brushless motor controller for bean milk machine |
| CN102946199A (en) * | 2012-11-09 | 2013-02-27 | 联合汽车电子有限公司 | Direct current insulation buck converter and matrix voltage detection circuit thereof |
| CN103138558A (en) * | 2011-12-05 | 2013-06-05 | 美固电子(深圳)有限公司 | Alternating current /direct current (AC/DC) dual-purpose compressor speed setting controller |
-
2015
- 2015-10-15 CN CN201510675346.6A patent/CN106602966A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH114596A (en) * | 1997-06-11 | 1999-01-06 | Sharp Corp | Motor drive equipment and air conditioner using this equipment |
| JP2002027787A (en) * | 2000-07-03 | 2002-01-25 | Keyence Corp | Motor driver |
| CN1490929A (en) * | 2002-10-17 | 2004-04-21 | Lg电子株式会社 | Driver of three-phase inductive motor and method thereof |
| US20090153094A1 (en) * | 2007-12-14 | 2009-06-18 | Hanning Elektro-Werke Gmbh & Co. Kg | Drive |
| CN201854231U (en) * | 2010-09-16 | 2011-06-01 | 深圳拓邦股份有限公司 | Direct current brushless motor controller for bean milk machine |
| CN103138558A (en) * | 2011-12-05 | 2013-06-05 | 美固电子(深圳)有限公司 | Alternating current /direct current (AC/DC) dual-purpose compressor speed setting controller |
| CN102946199A (en) * | 2012-11-09 | 2013-02-27 | 联合汽车电子有限公司 | Direct current insulation buck converter and matrix voltage detection circuit thereof |
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