CN107257590B - Control method and cooking appliance - Google Patents
Control method and cooking appliance Download PDFInfo
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- CN107257590B CN107257590B CN201710458981.8A CN201710458981A CN107257590B CN 107257590 B CN107257590 B CN 107257590B CN 201710458981 A CN201710458981 A CN 201710458981A CN 107257590 B CN107257590 B CN 107257590B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/666—Safety circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/687—Circuits for monitoring or control for cooking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Electromagnetism (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a control method for controlling an alternating current fan, wherein the alternating current fan is connected with an alternating current power supply through a switch. The control method comprises the following steps: detecting the output voltage of the alternating current power supply; judging whether the output voltage is greater than or equal to a preset voltage or not; and controlling the switch according to the output voltage when the output voltage is greater than or equal to the predetermined voltage so that the input voltage of the alternating current fan is the predetermined voltage. In addition, the invention also discloses a cooking appliance. The control method and the cooking appliance control the switch according to the output voltage of the alternating current power supply so that the input voltage of the alternating current fan is the preset voltage, and therefore the alternating current fan is controlled to work at the preset voltage to provide the proper wind cooling capacity.
Description
Technical Field
The invention relates to a household appliance, in particular to a control method and a cooking appliance.
Background
In the related art, a variable frequency microwave oven generally outputs constant power when input voltage is high, and outputs constant current when the input voltage is low, so that when the input voltage of a frequency converter changes, the output power is basically unchanged and the generated heat is basically the same, and therefore the frequency converter needs to be cooled by the same air cooling amount to ensure the normal operation of the frequency converter, while an alternating current fan of the variable frequency microwave oven generally has insufficient rotating speed of the alternating current fan and insufficient air cooling amount when the input voltage is low; when the input voltage is high, the rotation speed of the alternating current fan is too high, and large noise is generated.
Disclosure of Invention
The embodiment of the invention provides a control method and a cooking appliance.
A control method according to an embodiment of the present invention is a control method for controlling an ac fan connected to an ac power supply via a switch, the control method including:
detecting the output voltage of the alternating current power supply;
judging whether the output voltage is greater than or equal to a preset voltage or not; and
and when the output voltage is greater than or equal to the preset voltage, controlling the switch according to the output voltage to enable the input voltage of the alternating current fan to be the preset voltage.
In some embodiments, the predetermined voltage is 0.8 times the rated voltage of the ac fan.
In some embodiments, the controlling the switch according to the output voltage when the output voltage is equal to or greater than the predetermined voltage so that the input voltage of the ac fan is a predetermined voltage includes:
obtaining delay time according to the output voltage of the alternating current power supply;
controlling the switch to be switched off within the delay time after the output voltage of the alternating current power supply is zero-crossed; and
after the delay time after the output voltage of the alternating current power supply crosses zero, controlling the switch to be closed so that the output voltage of the alternating current power supply is used as the input voltage of the alternating current fan.
In certain embodiments, the control method comprises:
when the output voltage is smaller than the preset voltage, the voltage is indicated to be too low or the switch is controlled to be switched off so that the alternating current fan stops working.
In some embodiments, the detecting the output voltage of the ac power source includes:
and detecting the output voltage of the alternating current power supply according to a preset period.
An electric cooking appliance according to an embodiment of the present invention includes a control device and an ac fan, the ac fan is connected to an ac power supply through a switch, and the control device includes:
the detection module is used for detecting the output voltage of the alternating current power supply;
the judging module is used for judging whether the output voltage is greater than or equal to a preset voltage or not; and
the first control module is used for controlling the switch according to the output voltage when the output voltage is greater than or equal to the preset voltage so that the input voltage of the alternating current fan is the preset voltage.
In some embodiments, the predetermined voltage is 0.8 times the rated voltage of the ac fan.
In certain embodiments, the first control module comprises:
the processing unit is used for obtaining delay time according to the output voltage of the alternating current power supply;
the first control unit is used for controlling the switch to be switched off within the delay time after the output voltage of the alternating current power supply is subjected to zero crossing; and
a second control unit for controlling the switch to be closed after the delay time after the output voltage of the AC power supply crosses zero so that the output voltage of the AC power supply is used as the input voltage of the AC fan.
In certain embodiments, the control device comprises:
and the second control module is used for prompting that the voltage is too low or controlling the switch to be switched off to stop the alternating current fan when the output voltage is less than the preset voltage.
In some embodiments, the detection module is configured to detect the output voltage of the ac power source according to a predetermined period.
A cooking appliance of an embodiment of the present invention includes:
an AC fan; and
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs for executing the instructions of the control method.
The control method and the cooking appliance control the switch according to the output voltage of the alternating current power supply so that the input voltage of the alternating current fan is the preset voltage, and therefore the alternating current fan is controlled to work at the preset voltage to provide the appropriate wind cooling capacity.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart of a control method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the connection between the cooking appliance and the ac power supply according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a control circuit according to an embodiment of the present invention;
FIG. 4 is another flow chart diagram of a control method of an embodiment of the present invention;
FIG. 5 is a state diagram of the output voltage of the AC power source in accordance with an embodiment of the present invention;
FIG. 6 is a block schematic diagram of a first control module of an embodiment of the present invention;
FIG. 7 is a further schematic flow chart diagram of a control method in accordance with an embodiment of the present invention;
FIG. 8 is a block schematic diagram of a control device according to an embodiment of the present invention;
FIG. 9 is yet another flow chart diagram of a control method of an embodiment of the present invention;
fig. 10 is a module schematic view of a cooking appliance according to an embodiment of the present invention.
Description of the main element symbols:
the control device comprises a cooking appliance 100, an alternating current fan 10, a switch 12, a photoelectric coupler 14, a control device 20, a detection module 22, a judgment module 24, a first control module 26, a processing unit 262, a first control unit 264, a second control unit 266, a second control module 28, a processor 30, a memory 40 and an alternating current power supply 500.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1 and fig. 2, the control method according to the embodiment of the invention can be used to control the ac fan 10. Ac fan 10 is connected to ac power supply 500 via switch 12. The control method comprises the following steps:
step S22: detecting an output voltage of the ac power supply 500;
step S24: judging whether the output voltage is greater than or equal to a preset voltage or not; and
step S26: when the output voltage is equal to or higher than a predetermined voltage, the switch 12 is controlled according to the output voltage so that the input voltage of the ac fan 10 becomes the predetermined voltage.
Referring to fig. 2 again, the cooking appliance 100 according to the embodiment of the present invention includes an ac fan 10 and a control device 20. Ac fan 10 is connected to ac power supply 500 via switch 12. The control device 20 includes a detection module 22, a determination module 24, and a first control module 26. The detection module 22 is used for detecting the output voltage of the ac power supply 500. The judging module 24 is used for judging whether the output voltage is greater than or equal to a predetermined voltage. The first control module 26 is configured to control the switch 12 according to the output voltage when the output voltage is greater than or equal to a predetermined voltage, so that the input voltage of the ac fan 10 is the predetermined voltage.
That is, the control method of the embodiment of the present invention may be implemented by the cooking appliance 100 of the embodiment of the present invention, wherein the step S22 may be implemented by the detection module 22, the step S24 may be implemented by the judgment module 24, and the step S26 may be implemented by the first control module 26.
The control method and the cooking appliance 100 of the embodiment of the invention control the switch 12 according to the output voltage of the ac power supply 500 so that the input voltage of the ac fan 10 is a predetermined voltage, thereby controlling the ac fan 10 to operate at the predetermined voltage to provide a suitable amount of cooling.
In some embodiments, the switch 12 comprises an electronic switch and/or a mechanical switch, that is, the switch 12 may comprise an electronic switch, or a mechanical switch, or both. Specifically, to improve the real-time performance of the control and meet the high frequency on-off function, the switch 12 may include a thyristor. In an embodiment of the present invention, switch 12 comprises a thyristor.
In some embodiments, the ac power source 500 may be a mains or other ac powered power source. In the embodiment of the present invention, the ac power supply 500 is commercial power.
In some embodiments, when the output voltage is less than the predetermined high voltage, return is made to step S22.
In some embodiments, the switch 12 may be disposed in the ac fan 10 or disposed separately from the ac fan 10, that is, the ac fan 10 includes the switch 12 or the cooking appliance 100 includes the ac fan 10 and the switch 12, which is not particularly limited herein.
In some embodiments, the output voltage of the ac power supply 500 may refer to a maximum value (peak-to-peak value) or an effective value of the output voltage of the ac power supply 500, and in the embodiments of the present invention, the magnitude of the output voltage of the ac power supply 500 refers to a magnitude of the effective value of the output voltage of the ac power supply 500. Similarly, the predetermined voltage may also refer to a maximum value or an effective value of the predetermined voltage, and in the embodiment of the present invention, the predetermined voltage refers to an effective value of the predetermined voltage; the input voltage of ac fan 10 may be the maximum value or the effective value of the input voltage of ac fan 10, and in the embodiment of the present invention, the input voltage of ac fan 10 is the effective value of the input voltage of ac fan 10.
Referring to fig. 3, in some embodiments, the method for controlling the ac fan 10 may be implemented by the control circuit shown in fig. 3. Specifically, the photocoupler 14 receives a control signal PWM from an MCU (not shown) for detecting the output voltage of the ac power supply 500 and generating the control signal PWM, and the photocoupler 14 controls the on/off of itself according to the received control signal PWM to control the on/off of the switch 12, thereby controlling the ac power supply 500 to supply voltage to the ac fan 10 or to disconnect the electrical connection between the ac power supply 500 and the ac fan.
In some embodiments, the predetermined voltage is 0.8 times the rated voltage of the ac fan 10.
In this manner, it is convenient to control the input voltage of the ac fan 10 to a predetermined voltage by controlling the switch 12.
It is understood that the ac power supply 500 is used for providing the operating voltage of the ac fan 10, and when the ac fan 10 is used, the output voltage of the ac power supply 500 is generally in the fluctuation range of the rated voltage of the ac fan 10, and since the predetermined voltage is 0.8 times of the rated voltage of the ac fan 10, the output voltage of the ac power supply 500 is generally greater than the predetermined voltage, so that the input voltage of the ac fan 10 is conveniently made to be the predetermined voltage through the control of the switch 12. Further, when the input voltage of the ac fan 10 is 0.8 times the rated voltage, the rotational speed of the ac fan 10 is a predetermined rotational speed, so that the ac fan 10 can provide a predetermined amount of cooling wind. When the predetermined voltage is greater than 0.8 times the rated voltage of ac fan 10, the output voltage of ac power supply 500 is easily made smaller than the predetermined voltage, and thus the input voltage of ac fan 10 cannot be controlled to the predetermined voltage by switch 12; when the predetermined voltage is less than 0.8 times the rated voltage of the ac fan 10, the rotation speed of the ac fan is less than the predetermined rotation speed, so that the amount of air-cooling that the ac fan 10 can provide is insufficient.
Referring to fig. 4 and 5, in some embodiments, step S26 includes:
step S262: obtaining a delay time according to the output voltage of the ac power supply 500;
step S264: in the delay time after the output voltage of the ac power supply 500 crosses zero, the control switch 12 is turned off; and
step S266: after a delay time after the output voltage of the ac power supply 500 crosses zero, the control switch 12 is closed so that the output voltage of the ac power supply 500 serves as the input voltage of the ac fan 10.
Referring to fig. 5 and 6 together, in some embodiments, the first control module 26 includes a processing unit 262, a first control unit 264, and a second control unit 266. The processing unit 262 is used for obtaining the delay time according to the output voltage of the ac power supply 500. The first control unit 264 is used for controlling the switch 12 to be turned off in a delay time after the output voltage of the ac power supply 500 crosses zero. The second control unit 266 is configured to control the switch 12 to close after a delay time after the output voltage of the ac power supply 500 crosses zero, so that the output voltage of the ac power supply 500 is used as the input voltage of the ac fan 10.
That is, step S262 may be implemented by the processing unit 262, step S264 may be implemented by the first control unit 264, and step S266 may be implemented by the second control unit 266.
As such, it is possible to obtain the delay time from the output voltage of the ac power supply 500 and control the switch 12 according to the delay time so that the input voltage of the ac fan 10 is a predetermined voltage.
Specifically, the corresponding relationship between the output voltage of the ac power supply 500 and the delay time may be obtained through experiments in advance and stored in the ac fan 10, and after the output voltage of the ac power supply 500 is obtained, the delay time may be quickly obtained according to the output voltage and the corresponding relationship, so that in the delay time after the output voltage of the ac power supply 500 crosses zero, the switch 12 is controlled to be turned off so that the ac power supply 500 cannot provide the voltage for the ac fan 10; after a delay time after the output voltage of the ac power supply 500 crosses zero, the control switch 12 is closed so that the ac power supply 500 supplies the ac fan 10 with a voltage, thereby controlling the input voltage of the ac fan 10 to a predetermined voltage.
It should be noted that when the output voltage of the ac power supply 500 is equal to the predetermined voltage, the delay time is zero, that is, the switch 12 is always in the closed state so that the output voltage of the ac power supply 500 is used as the input voltage of the ac fan 10. In one example, the predetermined voltage is 176V, and the delay time T is 200V when the output voltage of the AC power supply 500 isdelay1, the delay time T when the output voltage of the AC power supply 500 is 220V delay2, the delay time is T when the output voltage of the AC power supply 500 is 240V delay3，T delay1<T delay2<T delay3。
In the example of fig. 5, T1, T2, T3 are three time points at which the output voltage of the ac power supply 500 crosses zero, T is a delay time, that is, the control device 20 controls the switch 12 to be opened during a time period from T1 to T1+ T, and the control device 20 controls the switch 12 to be closed during a time period from T1+ T to T2; during the time period T2 to T2+ T, the control device 20 controls the switch 12 to open, during the time period T2+ T to T3, the control device 20 controls the switch 12 to close, and so on. In this manner, the input voltages obtained by the ac fan 10 during the time when the switch 12 is closed can be made substantially equal and all equal to the predetermined voltage.
In some embodiments, a correlation calculation formula may be obtained in advance according to a relationship between the output voltage of the ac power supply 500 and the delay time and stored in the ac fan 10 in advance, so that after the output voltage of the ac power supply 500 is obtained, the delay time may be obtained by substituting the output voltage into the correlation calculation formula, which is not limited herein.
Referring to fig. 7, in some embodiments, the control method includes:
step S28: when the output voltage is less than the preset voltage, the voltage is indicated to be too low or the control switch 12 is switched off so as to stop the alternating current fan.
Referring to FIG. 8, in some embodiments, the control device 20 includes a second control module 28. The second control module 28 is used for prompting the voltage to be too low or controlling the switch 12 to be switched off to stop the alternating current fan when the output voltage is less than the preset voltage.
That is, step S28 may be implemented by the second control module 28.
In this way, when the output voltage of ac power supply 500 is insufficient, switch 12 may be controlled to be turned off to stop ac fan 10.
It can be understood that when the output voltage is less than the predetermined voltage, the input voltage of the ac fan 10 is also less than the predetermined voltage, which results in too low rotation speed of the ac fan 10 and insufficient air cooling amount, thereby affecting the normal operation of the ac fan 10, and therefore the cooking appliance 100 can be controlled to send a prompt message to prompt the user that the voltage is too low or control the switch 12 to be turned off to stop the operation of the ac fan 10. It should be noted that the cooking appliance 100 may include at least one of a display screen, an electro-acoustic element (such as a speaker) and a vibration element, that is, the cooking appliance 100 may include the display screen, or include the electro-acoustic element, or include the vibration element, or include the display screen and the electro-acoustic element, or include the display screen and the vibration element, or include the display screen, the electro-acoustic element and the vibration element. That is, the cooking appliance 100 may prompt the user that the voltage is too low through images, voice, text, vibration, and the like.
In some embodiments, the control device 20 may also control the cooking appliance 100 to stop working when the output voltage is less than the predetermined voltage, so as to prevent the cooking appliance 100 from failing to work normally due to too low voltage, thereby ensuring the safety of the cooking appliance 100.
Referring to fig. 9, in some embodiments, step S22 includes:
step S222: the output voltage of the ac power supply 500 is detected at a predetermined cycle.
Referring again to fig. 2, in some embodiments, the detecting module 22 is configured to detect the output voltage of the ac power supply 500 according to a predetermined period.
That is, step S222 may be implemented by the detection module 22.
In this way, it is possible to avoid the influence on the control of the input voltage of ac fan 10 when the output voltage of ac power supply 500 fluctuates relatively frequently.
Specifically, the output voltage of the ac power supply 500 may fluctuate due to external factors or internal factors of the ac power supply 500, and the output voltage of the ac power supply 500 fluctuates frequently when the situation is special. When the output voltage of the ac power supply 500 fluctuates frequently, for example, 170V before 1 second, 180V now, and 200V after 1 second, the delay time obtained according to the output voltage also changes all the time, thereby greatly increasing the difficulty of controlling the input voltage of the ac fan 10. Therefore, it is possible to detect the output voltage of the ac power supply 500 at a predetermined cycle, thereby acquiring a corresponding delay time within the predetermined cycle, and to control the input voltage of the ac fan 10 according to the delay time.
In some embodiments, the length of the predetermined period may be obtained experimentally or determined by user input. And is not particularly limited herein. In one example, the predetermined period is 10 seconds.
Referring to fig. 10, the cooking appliance 100 according to the embodiment of the present invention includes an ac fan 10, one or more processors 30, a memory 40, and one or more programs. Where one or more programs are stored in the memory 40 and configured for execution by the one or more processors 30, the programs being for executing the instructions of the control method of any of the above embodiments of the invention.
As an example, the program may be for executing the instructions of the control method as described in the following steps:
step S22: detecting an output voltage of the ac power supply 500;
step S24: judging whether the output voltage is greater than or equal to a preset voltage or not; and
step S26: when the output voltage is equal to or higher than a predetermined voltage, the switch 12 is controlled according to the output voltage so that the input voltage of the ac fan 10 becomes the predetermined voltage.
In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of embodiments of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A control method for controlling an ac fan, the ac fan being connected to an ac power source through a switch, the control method comprising:
detecting the output voltage of the alternating current power supply;
judging whether the output voltage is greater than or equal to a preset voltage or not; and
when the output voltage is greater than or equal to the preset voltage, controlling the switch according to the output voltage to enable the input voltage of the alternating current fan to be the preset voltage;
controlling the switch according to the output voltage when the output voltage is greater than or equal to the predetermined voltage so that the input voltage of the alternating current fan is the predetermined voltage includes:
obtaining delay time according to the output voltage of the alternating current power supply;
controlling the switch to be switched off within the delay time after the output voltage of the alternating current power supply is zero-crossed; and
after the delay time after the output voltage of the alternating current power supply crosses zero, controlling the switch to be closed so that the output voltage of the alternating current power supply is used as the input voltage of the alternating current fan.
2. The control method according to claim 1, wherein the predetermined voltage is 0.8 times a rated voltage of the alternating-current fan.
3. The control method according to claim 1, characterized by comprising:
when the output voltage is smaller than the preset voltage, the voltage is indicated to be too low or the switch is controlled to be switched off so that the alternating current fan stops working.
4. The control method according to claim 1, wherein detecting the output voltage of the alternating-current power supply includes:
and detecting the output voltage of the alternating current power supply according to a preset period.
5. An electric cooking appliance, comprising a control device and an ac fan, wherein the ac fan is connected to an ac power source through a switch, and the control device comprises:
the detection module is used for detecting the output voltage of the alternating current power supply;
the judging module is used for judging whether the output voltage is greater than or equal to a preset voltage or not; and
a first control module, configured to control the switch according to the output voltage when the output voltage is greater than or equal to the predetermined voltage, so that an input voltage of the ac fan is the predetermined voltage;
the first control module includes:
the processing unit is used for obtaining delay time according to the output voltage of the alternating current power supply;
the first control unit is used for controlling the switch to be switched off within the delay time after the output voltage of the alternating current power supply is subjected to zero crossing; and
a second control unit for controlling the switch to be closed after the delay time after the output voltage of the AC power supply crosses zero so that the output voltage of the AC power supply is used as the input voltage of the AC fan.
6. The cooking appliance according to claim 5, wherein the predetermined voltage is 0.8 times the rated voltage of the AC fan.
7. The cooking appliance according to claim 5, characterized in that the control means comprise:
and the second control module is used for prompting that the voltage is too low or controlling the switch to be switched off to stop the alternating current fan when the output voltage is less than the preset voltage.
8. The cooking appliance according to claim 5, wherein the detection module is configured to detect the output voltage of the AC power source according to a predetermined period.
9. An electric cooking appliance, characterized in that it comprises:
an AC fan;
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, for executing the instructions of the control method of any of claims 1-4.
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| CN202979541U (en) * | 2012-10-30 | 2013-06-05 | 苏州工业园区和顺电气股份有限公司 | Cooling device for charging machine |
| CN104425184A (en) * | 2013-08-23 | 2015-03-18 | 海尔集团公司 | Control device for switching on and switching off relay and air conditioner |
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| CN101192065B (en) * | 2006-11-20 | 2010-07-14 | 中兴通讯股份有限公司 | Heat radiating fan control device and method |
| CN204716583U (en) * | 2015-05-26 | 2015-10-21 | 广东易事特电源股份有限公司 | A kind of ac fan alignment circuit |
| CN204783771U (en) * | 2015-06-17 | 2015-11-18 | 佛山市顺德区美的电热电器制造有限公司 | Fault detection device of direct current fan system and direct current fan system |
| CN106004334A (en) * | 2016-06-27 | 2016-10-12 | 张宏 | Multifunctional fan operation control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202979541U (en) * | 2012-10-30 | 2013-06-05 | 苏州工业园区和顺电气股份有限公司 | Cooling device for charging machine |
| CN104425184A (en) * | 2013-08-23 | 2015-03-18 | 海尔集团公司 | Control device for switching on and switching off relay and air conditioner |
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