CN112021913B

CN112021913B - Control method of cooking appliance and cooking appliance

Info

Publication number: CN112021913B
Application number: CN201910477246.0A
Authority: CN
Inventors: 樊杜平; 曹凯; 陈建化
Original assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Current assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2023-08-01
Anticipated expiration: 2039-06-03
Also published as: CN112021913A

Abstract

The invention provides a control method of a cooking appliance and the cooking appliance. The cooking utensil includes that overflow detection module, signal frequency conversion module and controlling means, signal frequency conversion module and overflow detection module electricity are connected, and controlling means and signal frequency conversion module electricity are connected, and control method includes: the overflow detection module detects an overflow electric signal of the cooking utensil; the signal frequency conversion module converts the overflow electric signal into a frequency signal; the control device receives the frequency signal and controls the heating power and/or the heating time of the heating device of the cooking appliance according to the frequency signal. Therefore, the cooking condition in the cooking space in the cooking process of the cooking appliance is determined according to the frequency of the frequency signal, the cooking stage is further determined, the heating power and/or the heating time of the heating device of the cooking appliance are controlled according to different cooking stages, so that liquid in the cooking space is prevented from overflowing, the cooking effect is improved, and the user experience is improved.

Description

Control method of cooking appliance and cooking appliance

Technical Field

The present invention relates generally to the field of electric heating appliances, and more particularly to a control method of a cooking appliance and a cooking appliance.

Background

Nowadays, cooking appliances comprise an overflow-proof probe and a control device. The anti-overflow probe extends into the cooking space. The overflow-preventing probe is electrically connected with the control device and the power supply through the overflow-preventing circuit. If the liquid in the cooking space is contacted with the overflow preventing probe, a circuit in which the overflow preventing probe is positioned is conducted, and at the moment, the overflow electric signal received by the control device from the overflow preventing probe is changed. Therefore, the control device judges that the liquid in the cooking space overflows, and further controls the heating power and/or the heating time of the heating device of the cooking appliance so as to avoid the overflow of the liquid in the cooking space.

In the cooking process of the cooking utensil, the concentration of steam and bubble in the cooking space is different in different cooking stages. The method can determine that the liquid in the cooking space is about to overflow only after the liquid in the cooking space boils to contact the overflow preventing probe. The concentration change of steam and bubble in the cooking space can not be monitored in the whole cooking process, the specific cooking stage of the cooking process can not be determined, and the heating power and/or heating time of the heating device can not be controlled according to different cooking stages, so that the overflow of liquid in the cooking space can be avoided, and the cooking effect (the cooking time is shortened) can be improved.

Accordingly, there is a need to provide a control method of a cooking appliance and a cooking appliance to at least partially solve the above-mentioned problems.

Disclosure of Invention

In the summary, a series of concepts in simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to at least partially solve the above technical problems, according to an aspect of the present invention, there is provided a control method of a cooking appliance, the cooking appliance including an overflow detection module, a signal frequency conversion module electrically connected to the overflow detection module, and a control device electrically connected to the signal frequency conversion module, the control method including:

the overflow detection module detects an overflow electric signal of the cooking utensil;

the signal frequency conversion module converts the overflow electric signal into a frequency signal;

the control device receives the frequency signal and controls the heating power and/or the heating time of the heating device of the cooking appliance according to the frequency signal.

According to the control method of the cooking appliance, the cooking condition in the cooking space in the cooking process of the cooking appliance is determined according to the frequency of the frequency signal, the cooking stage is further determined, and the heating power and/or the heating time of the heating device of the cooking appliance are controlled according to different cooking stages, so that the overflow of liquid in the cooking space is avoided, the cooking effect is improved, and the user experience is improved.

Optionally, the frequency signal has a frequency in the range of 0 to 5KHZ. Thus, the monitoring range is large.

The invention also provides a cooking appliance, which comprises an overflow detection module, a control module and a control module, wherein the overflow detection module is used for detecting an overflow electric signal of the cooking appliance; the signal frequency conversion module is used for converting the overflow electric signal output by the overflow detection module into a frequency signal and outputting the frequency signal; a heating device for providing heat to a cooking element of the cooking appliance; and the control device is used for controlling the working parameters of the heating device through the control method.

According to the cooking appliance, the working parameters of the heating device are controlled by the cooking appliance through the control method, the cooking condition in the cooking space in the cooking process of the cooking appliance is determined according to the frequency of the frequency signal, the cooking stage is further determined, and the heating power and/or the heating time of the heating device of the cooking appliance are controlled according to different cooking stages, so that the overflow of liquid in the cooking space is avoided, the cooking effect is improved, and the user experience is improved.

Optionally, the overflow detection module includes an overflow prevention probe electrically connected to the signal frequency conversion module, and the signal frequency conversion module obtains an overflow electric signal through the overflow prevention probe. Therefore, the overflow electric signal acquisition operation through the overflow prevention probe is simple.

Optionally, the signal frequency conversion module includes the chip, two first resistance, the second resistance, first electric capacity and the power input who is used for connecting the power, the power entry and the power input of chip are connected, connect after first resistance and second resistance establish ties between the first input port of chip and the first probe of anti-overflow probe, the second input port and the first output port of chip are connected respectively to the one end of another first resistance, the second probe of anti-overflow probe is connected to the other end of another first resistance, the third output port of chip and controlling means's signal receiving terminal electricity are connected, the ground connection port of chip is earthed, the hookup location of second resistance and first resistance is connected to the one end of first electric capacity, the second output port and the third input port of chip are connected respectively to the other end of first electric capacity. Therefore, the circuit structure of the signal frequency conversion module is simple.

Alternatively, the chip is 74HCO4. Thus, the model selection is convenient.

Optionally, the signal frequency conversion module further includes a second capacitor, one end of the second capacitor is connected to the ground port, and the other end of the second capacitor is connected to the signal receiving end. Thus, the second capacitor can play a role of filtering, and the signal receiving end of the filtering controller receives an interference electric signal in the signal.

Optionally, the signal frequency conversion module further comprises a triode, an emitter of the triode is connected with a power supply inlet of the chip, a base electrode of the triode is electrically connected with a control output end of the control device, and a collector electrode of the triode is connected with a power supply input end. Therefore, the controller sends a control signal to the base electrode of the triode to control the on-off of the triode and further control whether to supply power to the chip.

Optionally, the signal frequency conversion module further includes a third resistor, a fourth resistor and a third capacitor, one end of the third resistor is connected with the power input end, the other end of the third resistor is connected with the base of the triode, one end of the fourth resistor is connected with the base of the triode, the other end of the fourth resistor is electrically connected with the control output end of the control device, one end of the third capacitor is grounded, and the other end of the third capacitor is electrically connected with the control output end of the control device. Therefore, the third resistor and the fourth resistor ensure that the triode stably works in a saturated on state or an off state; the third capacitor can play a role of filtering, and the interference electric signal at the control output end of the controller is filtered.

Optionally, the cooking appliance is an electric rice cooker, an electric pressure cooker or an electric stew pot.

Drawings

In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.

Fig. 1 is a schematic view of a control method of a cooking appliance according to a preferred embodiment of the present invention;

fig. 2 is a block diagram of a structure of the cooking appliance of fig. 1;

FIG. 3 is a schematic diagram of a signal frequency conversion module of the cooking appliance of FIG. 1; and

fig. 4 is a flow chart illustrating a control method of the cooking appliance of fig. 1.

Reference numerals illustrate:

100: spill-proof probe 200: control device

210: signal receiving terminal 220: control output terminal

300: signal frequency conversion module 310: chip

311: power inlet 320: power supply input terminal

330: first resistor 340: second resistor

350: first capacitor 360: second capacitor

370: triode 380: third resistor

390: fourth resistor 400: third capacitor

410: probe connection 411: first connecting end

412: second connecting end

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the invention.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present invention. It will be apparent that embodiments of the invention may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.

The invention provides a control method of a cooking appliance. According to the control method, the heating power and the heating time of the heating device of the cooking appliance can be controlled according to the cooking conditions (the concentration of steam and the concentration of bubbles) in the cooking space of the cooking appliance, so that liquid in the cooking space is prevented from overflowing, the cooking effect is improved (for example, the cooking time is shortened), and the user experience is improved.

The cooking utensil mainly comprises a cooker body and a cover body. The pot body is basically in a rounded cuboid shape and is provided with a cylindrical inner pot containing part, and the inner pot (cooking element) can be freely placed in or taken out from the inner pot containing part so as to conveniently clean the inner pot. The upper surface of the inner pot has a circular opening for holding materials to be heated, such as rice, soup, etc., in the inner pot. The cover body is basically in a round-corner cuboid shape and basically corresponds to the shape of the pot body. The cover body is pivotally connected to the cooker body in an openable and closable manner and is used for covering the cooker body. When the cover body is covered on the cooker body, a cooking space is formed between the cover body and the inner cooker.

As shown in fig. 2 and 3, the cooking appliance includes an overflow detection module, a signal frequency conversion module 300, and a control device 200. The signal frequency conversion module 300 is electrically connected to the overflow detection module. The control device is electrically connected to the signal frequency conversion module 300. The overflow detection module may include an overflow prevention probe 100. The overflow prevention probe 100 is used to detect an overflow electric signal of the cooking appliance. The signal frequency conversion module 300 is configured to receive an overflow electric signal of the overflow prevention probe 100 and convert the overflow electric signal into a frequency signal; the control device 200 is configured to receive a frequency signal of the signal frequency conversion module 300 and control heating power and heating time of a heating device of the cooking appliance according to the frequency signal. It will be appreciated that in other embodiments, the control device 200 may control only any one of the heating power and the heating time of the heating device.

The overflow prevention probe 100 includes a first overflow prevention probe and a second overflow prevention probe. The signal frequency conversion module 300 includes a probe connection 410, a chip 310, two first resistors 330, a second resistor 340, a third resistor 380, a fourth resistor 390, a first capacitor 350, a second capacitor 360, a third capacitor 400, and a triode 370.

The probe connection 410 includes a first connection end 411 and a second connection end 412. Chip 310 may be a 74HCO4 chip. The chip 310 includes a first input port (1A), a second input port (2A), a power supply inlet 311 (VCC), a third output port (3Y), and a ground port (GND). The control device 200 comprises a signal receiving terminal 210 and a control output terminal 220. The first overflow prevention probe is connected to the first input port through a first connection end 411 of the probe connection portion 410. The second spill-resistant probe is connected to the second input port by a second connection end 412 of the probe connection portion 410. The ground port is grounded. The power supply inlet 311 is electrically connected to the power supply input 320 via a transistor 370. The power input 320 is used for connecting to a power source. The third output port is electrically connected to the signal receiving end 210 of the control device 200. Such that the power supply provides power to the chip 310. Preferably, the output voltage of the power supply is 5V.

In this embodiment, as shown in fig. 1, a control method of a cooking appliance includes:

step S100, an overflow detection module detects an overflow electric signal of the cooking utensil;

step S200, a signal frequency conversion module converts the overflow electric signal into a frequency signal;

step S300, the control device receives the frequency signal and controls the heating power and/or the heating time of the heating device of the cooking utensil according to the frequency signal.

In this embodiment, the first and second spill-proof probes extend into the cooking space. Thus, when the cooking appliance cooks food, the first overflow prevention probe and the second overflow prevention probe are both contacted with steam or water bubbles (water bubbles during boiling) in the cooking space. As such, the chip 310 receives the overflow electrical signals detected from the first and second overflow prevention probes. Therefore, the overflow electric signal acquisition operation through the overflow prevention probe is simple. The overflow electrical signal is an analog signal. The overflow electrical signal is converted to a frequency signal in chip 310, which is a digital signal. The chip 310 transmits the frequency signal to the control device 200 through a third output port. The control device 200 determines the frequency of the frequency signal. The control device 200 determines whether the frequency of the frequency signal is within a preset range according to a preset condition, if so, controls the heating power and the heating time of the heating device of the cooking appliance to avoid the liquid in the cooking space from overflowing the cooking space and improve the cooking effect (shorten the cooking time). Therefore, according to the frequency of the frequency signal, the cooking condition (the concentration of steam and the concentration of bubbles) in the cooking space in the cooking process of the cooking appliance is determined, the cooking stage corresponding to the frequency of the current frequency signal is further judged, the heating power and the heating time of the heating device of the cooking appliance are controlled according to different cooking stages, so that the overflow of liquid in the cooking space is avoided, the cooking effect is improved (for example, the cooking time is shortened), and the user experience is improved.

The control device 200 is provided with frequency ranges of frequency signals corresponding to different cooking stages (for example, a steam concentration of a heating stage is A1, a bubble concentration of a water bubble is B1, and a frequency range corresponding to a heating stage is C1, a steam concentration of a boiling stage is A2, a bubble concentration of a water bubble is B2, and a frequency range corresponding to a boiling stage is C2). The control device 200 determines the frequency of the frequency signal. The control device 200 then compares the frequency with frequency ranges preset in the control device 200 corresponding to different cooking phases, and further determines a cooking phase corresponding to the frequency of the frequency signal. And then controlling the heating power and the heating time of the heating device according to preset conditions (for example, if the cooking stage corresponding to the frequency of the frequency signal is a boiling stage, the heating power of the heating device is reduced so as to prevent the liquid in the cooking space from overflowing the cooking space, and if the cooking stage corresponding to the frequency of the frequency signal is a heating stage, the heating power of the heating device is increased so as to shorten the heating time, etc.). Therefore, liquid in the cooking space is prevented from overflowing, and the cooking effect can be improved.

Preferably, the frequency range of the frequency signal is 0 to 5KHZ. Thus, the monitoring range is large.

Preferably, the frequency of the frequency signal is in the range of 0-100HZ, which indicates that no water vapor or water bubbles are detected, and heating is started immediately at this time, so that the heating power of the heating device can be increased to shorten the cooking time. The frequency of the frequency signal is within 100-5 KHZ, so that the higher the frequency is, the higher the concentration of water vapor and the concentration of water bubbles are, and the more severe the boiling is. The 100HZ-5KHZ average can be divided into 10 ranges of frequencies and the boiling level into 10 ranges. The 10 th frequency range corresponds to the 10 th boiling level one by one. The heating power and heating time of the corresponding heating means may be set for each boiling level. When the cooking stage is at a certain boiling level, the heating device can be controlled to generate heat according to the heating power and the heating time corresponding to the boiling level, so that the liquid in the cooking space is prevented from overflowing.

In this embodiment, a first resistor 330 is connected in series between the first input port of the chip 310 and the first connection terminal 411 of the probe connection part 410. Another first resistor 330 is connected in series between the second input port of the chip 310 and the second connection end 412 of the probe connection part 410.

In this embodiment, the chip 310 further includes a first output port (1Y). One end of the first resistor 330 connected to the second input port of the chip 310 is also connected to the first output port (1Y) of the chip 310. That is, the first and second input ports of the chip 310 are connected by wires outside the chip 310.

In this embodiment, the chip 310 further includes a second output port (2Y) and a third input port (3A). The second resistor 340 is connected in series in the circuit between the first anti-overflow probe and the first input port of the chip 310, and the second resistor 340 is connected in series between the first resistor 330 and the first input port of the chip 310. One end of the first capacitor 350 is connected to a wire connecting the second resistor 340 and the first resistor 330. The other end of the first capacitor 350 is connected to the third input port (3A) and the second output port (2Y), respectively.

In this embodiment, one end of the second capacitor 360 is connected to the third output port (3Y) of the chip 310. The other end of the second capacitor 360 is connected to the ground port of the chip 310. Thus, the second capacitor 360 can perform a filtering function to filter the interference electrical signal in the signal received by the signal receiving end 210 of the control device 200.

In this embodiment, the emitter of the transistor 370 is connected to the power supply inlet 311 of the chip 310, and the collector of the transistor 370 is connected to the power supply input 320. The base of transistor 370 is connected to control output 220 of control device 200 via fourth resistor 390. Thus, the control device 200 sends a control signal to the base of the triode 370 to control the on/off of the triode 370, and thus control whether to supply power to the chip 310.

In this embodiment, one end of the third resistor 380 is connected to the collector of the transistor 370. A second terminal of the third resistor 380 is connected to the base of the transistor 370. The third resistor 380 and the fourth resistor 390 thereby ensure that the transistor 370 stably operates in a saturated on state or an off state.

In the present embodiment, one end of the third capacitor 400 is connected to the control output terminal 220 of the control device 200. The other end of the third capacitor 400 is grounded. In this way, the third capacitor 400 can perform a filtering function to filter the interference electrical signal at the control output 220 of the control device 200.

In this embodiment, the chip 310 further includes a fourth input port (4A), a fifth input port (5A), and a sixth input port (6A). The fourth input port, the fifth input port, and the sixth input port are all grounded.

In this embodiment, the cooking process of the cooking appliance specifically includes the following method, as shown in fig. 4:

step S1, starting to work a system of the cooking utensil, and starting to cook food materials in the inner pot. Step S2 is performed.

Step S2, the overflow preventing probe 100 detects the overflow electric signal in the cooking space in real time, and step S3 is executed.

Step S3, the signal frequency conversion module 300 converts the current overflow electric signal from an analog signal to a frequency signal, and sends the frequency signal to the control device 200, and performs step S4.

Step S4, the control device 200 determines the frequency of the current frequency signal, and determines the current cooking stage according to the recorded frequency ranges of different cooking stages, and performs step S5.

In step S5, the control device 200 controls the heating power and the heating time of the heating device according to the preset conditions and the current cooking stage so that the heating power and the heating time of the heating device are adapted to the current cooking stage.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the invention. Terms such as "component" as used herein may refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like as used herein may refer to one component being directly attached to another component or to one component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the invention, which variations and modifications are within the scope of the invention as claimed.

Claims

1. A control method of a cooking appliance, characterized in that the cooking appliance comprises a pot body and a cover body pivotally connected to the pot body in an openable and closable manner, and when the cover body is covered on the pot body, a cooking space is formed between the cover body and an inner pot in the pot body, the cooking appliance further comprises an overflow detection module, a signal frequency conversion module (300) and a control device (200), the overflow detection module comprises an overflow prevention probe (100) electrically connected with the signal frequency conversion module (300), the overflow prevention probe can extend into the cooking space, the signal frequency conversion module (300) is electrically connected with the overflow detection module, and the control device (200) is electrically connected with the signal frequency conversion module (300), the control method comprises:

the overflow detection module detects an overflow electric signal of the cooking utensil in real time;

a signal frequency conversion module (300) acquires the overflow electric signal through the overflow prevention probe and converts the overflow electric signal into a frequency signal;

the control device (200) receives the frequency signal and determines the current cooking stage according to the frequency signal and a frequency range preset in the control device and corresponding to different cooking stages, so as to control the heating power and/or the heating time of the heating device of the cooking appliance according to the cooking stage.

2. The control method according to claim 1, characterized in that the frequency range of the frequency signal is 0 to 5KHZ.

3. A cooking appliance comprising a pot and a cover pivotally connected to the pot in an openable and closable manner, and forming a cooking space between the cover and an inner pot in the pot when the cover is closed on the pot, the cooking appliance further comprising:

the overflow detection module is used for detecting overflow electric signals of the cooking appliance in real time and comprises an overflow prevention probe (100) which can extend into the cooking space;

the signal frequency conversion module (300) is electrically connected with the overflow prevention probe and is used for acquiring the overflow electric signal through the overflow prevention probe, converting the overflow electric signal output by the overflow detection module into a frequency signal and outputting the frequency signal;

a heating device for providing heat to a cooking element of the cooking appliance;

control means (200) for controlling the operating parameters of the heating means by the control method according to claim 1 or 2.

4. A cooking appliance according to claim 3, wherein the signal frequency conversion module (300) comprises a chip (310), two first resistors (330), a second resistor (340) and a first capacitor (350) connected to a power input (320) for connecting to a power source, the power input (311) and the power input (320) of the chip (310) are connected, one of the first resistor (330) and the second resistor (340) is connected in series and then connected between a first input of the chip (310) and a first probe of the spill-proof probe (100), one end of the other first resistor (330) is connected to a second input of the chip (310) and a first output of the first resistor (340), the other end of the other first resistor (330) is connected to a second probe of the spill-proof probe (100), a third output of the chip (310) is connected to a signal receiving end (210) of the control device (200), a ground port of the chip (310) is connected to ground, and the other end of the first resistor (330) is connected to the first output of the second resistor (350) and the other end of the first resistor (350) is connected to the second input of the first resistor (350).

5. The cooking appliance according to claim 4, wherein the chip (310) is 74HCO4.

6. The cooking appliance according to claim 4, wherein the signal frequency conversion module (300) further comprises a second capacitor (360), one end of the second capacitor (360) is connected to the ground port, and the other end of the second capacitor (360) is connected to the signal receiving end (210).

7. The cooking appliance according to claim 4, wherein the signal frequency conversion module (300) further comprises a triode (370), an emitter of the triode (370) is connected to the power supply inlet (311) of the chip (310), a base of the triode (370) is electrically connected to the control output (220) of the control device (200), and a collector of the triode (370) is connected to the power supply input (320).

8. The cooking appliance according to claim 7, wherein the signal frequency conversion module (300) further comprises a third resistor (380), a fourth resistor (390) and a third capacitor (400), one end of the third resistor (380) is connected to the power input terminal (320), the other end of the third resistor (380) is connected to the base of the triode (370), one end of the fourth resistor (390) is connected to the base of the triode (370), the other end of the fourth resistor (390) is electrically connected to the control output terminal (220) of the control device (200), one end of the third capacitor (400) is grounded, and the other end of the third capacitor (400) is electrically connected to the control output terminal (220) of the control device (200).

9. A cooking appliance according to claim 3, wherein the cooking appliance is an electric rice cooker, an electric pressure cooker or an electric stewpan.

10. A cooking appliance according to claim 3, wherein the overflow prevention probe comprises a first overflow prevention probe and a second overflow prevention probe, the first overflow prevention probe and the second overflow prevention probe being extendable into the cooking space.