CN109237530B

CN109237530B - Dry burning prevention control method and dry burning prevention system

Info

Publication number: CN109237530B
Application number: CN201811026548.8A
Authority: CN
Inventors: 韩杰; 戴相录; 李孟彬; 季俊生; 唐相伟
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2018-09-04
Filing date: 2018-09-04
Publication date: 2020-03-03
Anticipated expiration: 2038-09-04
Also published as: CN109237530A

Abstract

The invention discloses an anti-dry heating control method and an anti-dry heating system. The control method for preventing dry burning comprises the following steps: collecting the temperature of a cooker and the current firepower of the cooker; determining the cooking state of the cooker according to the temperature of the cooker; acquiring a current dry-burning prevention temperature threshold value of the corresponding stove according to the cooking state of the stove and the current firepower of the stove; and if the temperature of the cooker is higher than the current dry burning prevention temperature threshold value of the cooker, controlling the cooker to be closed. Acquiring a current alarm temperature threshold value of the corresponding kitchen range according to the cooking state of the kitchen range and the current firepower of the kitchen range; and if the temperature of the cooker is greater than the current alarm temperature threshold of the cooker, controlling the cooker to send alarm information corresponding to the current alarm temperature threshold of the cooker. Therefore, more accurate alarm temperature threshold and dry burning prevention temperature threshold are obtained through the cooking state and different firepower of the cooker, and the cooker timely informs a user of the cooking condition of the cooker before or when the dry burning happens.

Description

Dry burning prevention control method and dry burning prevention system

Technical Field

The invention relates to the technical field of cooking appliances, in particular to an anti-dry heating control method and an anti-dry heating system.

Background

In the related art, the dry burning prevention function provided in the household cooker can automatically close the cooker when the temperature of the cooker reaches the dry burning prevention temperature threshold. However, the same dry-burning prevention temperature threshold is uniformly used in the existing dry-burning prevention control method under the fire power of any cooking utensils, and the dry-burning occurrence is judged when the temperature of the cookware is higher than the dry-burning prevention temperature threshold, so that the dry-burning time reaching the dry-burning starting temperature threshold is longer when the cooking utensils are on a small fire. Meanwhile, before the stove is dry-burned or when the stove just starts dry-burning, the user cannot be informed to close the stove in time, when the temperature of the pot reaches the dry-burning prevention temperature threshold, the pot may be dry-burned and continues for a certain time, so that the food in the pot is easily carbonized, the pot is difficult to clean, and the user experience is poor.

Disclosure of Invention

The embodiment of the invention provides an anti-dry heating control method and an anti-dry heating system.

The dry burning prevention control method is used for a kitchen range and comprises the following steps:

collecting the temperature of a cooker and the current firepower of the cooker;

determining the cooking state of the cooker according to the temperature of the cooker;

acquiring a corresponding current dry burning prevention temperature threshold of the cooker according to the cooking state of the cooker and the current firepower of the cooker, wherein the dry burning prevention temperature threshold of the cooker is positively correlated with the firepower of the cooker;

judging whether the temperature of the cooker is greater than the current dry-burning prevention temperature threshold value of the cooker or not;

if the temperature of the cooker is greater than the current dry-burning prevention temperature threshold value of the cooker, controlling the cooker to be closed;

acquiring a corresponding current alarm temperature threshold of the cooker according to the cooking state of the cooker and the current firepower of the cooker, wherein the alarm temperature threshold of the cooker is positively correlated with the firepower of the cooker;

judging whether the temperature of the cooker is greater than the current alarm temperature threshold of the cooker or not;

if the temperature of the cooker is larger than the current alarm temperature threshold of the cooker, controlling the cooker to send alarm information corresponding to the current alarm temperature threshold of the cooker;

the current dry burning prevention temperature threshold of the stove is larger than the current alarm temperature threshold of the stove.

In the dry burning prevention control method of the embodiment of the invention, the corresponding alarm temperature threshold value of the cooker and the dry burning prevention temperature threshold value of the cooker are obtained according to the cooking state of the cooker and the firepower of the cooker, the cooker is controlled to be closed when the temperature of the cooker is higher than the dry burning prevention temperature threshold value, and the cooker is controlled to send alarm information corresponding to the alarm temperature threshold value when the temperature of the cooker is higher than the alarm temperature threshold value.

In some embodiments, the cooking states include a water cooking state and a no water cooking state, and determining the cooking state of the cooker according to the temperature of the pot includes:

judging whether the boiling section exists in the pot according to the temperature of the pot,

if so, determining that the stove is in the water cooking state;

if not, determining that the stove is in the waterless cooking state.

In some embodiments, determining whether a boiling section is present based on the temperature of the pot comprises:

judging whether the collected quantity of the temperatures of the cookware is larger than a preset quantity or not;

if so, calculating the change rate of the temperature of the pot within a preset time, and when the change rate of the temperature is smaller than or equal to a preset value, determining that the boiling section of the pot exists and taking the current temperature of the pot as the pot boiling temperature of the pot;

and when the change rate of the temperature is greater than the preset value, determining that the boiling section does not exist in the pot.

In some embodiments, the rate of change of the temperature of the pot over the preset time period comprises at least one of:

the sum of absolute values of differences between the temperatures of the pots in the preset duration and the average value of the temperatures of the pots in the preset duration;

the slope of the temperature of the cookware to the time within the preset time length;

the variance of the temperature of the cookware within the preset time length;

and the standard deviation of the temperature of the cookware within the preset time length.

In some embodiments, obtaining a corresponding current alarm temperature threshold of the cooktop according to a cooking state of the cooktop and a current fire of the cooktop includes:

when the stove is in the water cooking state, acquiring a first alarm temperature value according to the current firepower of the stove, and setting the first alarm temperature value as the current alarm temperature threshold value of the stove;

when the stove is in the waterless cooking state, acquiring a second alarm temperature value according to the current firepower of the stove, and setting the second alarm temperature value as the current alarm temperature threshold of the stove;

the second alarm temperature value is greater than the first alarm temperature value.

In some embodiments, obtaining a corresponding current dry-burning prevention temperature threshold of the cooker according to the cooking state of the cooker and the current firepower of the cooker comprises:

when the stove is in the water cooking state, acquiring a first dry burning prevention temperature value according to the current firepower of the stove, and setting the first dry burning prevention temperature value as a current dry burning prevention temperature threshold value of the stove;

when the stove is in the waterless cooking state, acquiring a second dry burning prevention temperature value according to the current firepower of the stove, and setting the second dry burning prevention temperature value as the current dry burning prevention temperature threshold value of the stove;

the second dry burning prevention temperature value is greater than the first dry burning prevention temperature value.

In certain embodiments, the control method comprises: work as the cooking utensils are in when having water culinary art state, according to the temperature of pan acquires the heat conductivity of pan, according to the current firepower of cooking utensils with the heat conductivity of pan acquires the correspondence the current warning temperature threshold value of cooking utensils with the current anti-dry burning temperature threshold value of cooking utensils.

In some embodiments, obtaining a corresponding current alarm temperature threshold of the cookware according to the current firepower of the cookware and the thermal conductivity of the cookware includes:

judging whether the boiling temperature of the pot is less than or equal to the preset heat conduction temperature,

if yes, obtaining a third alarm temperature value according to the current firepower of the cooker and the heat conductivity of the cooker, and setting the third alarm temperature value as a current alarm temperature threshold value of the cooker;

if not, acquiring a fourth alarm temperature value according to the current firepower of the cooker and the heat conductivity of the cooker, and setting the fourth alarm temperature value as the current alarm temperature threshold value of the cooker;

the fourth alarm temperature value is greater than the third alarm temperature value.

In some embodiments, obtaining a corresponding dry-heating prevention temperature threshold of the cooker according to the current firepower of the cooker and the thermal conductivity of the pot includes:

if yes, obtaining a third dry burning prevention temperature value according to the current firepower of the cooker and the heat conductivity of the cooker, and setting the third dry burning prevention temperature value as a current dry burning prevention temperature threshold value of the cooker;

if not, acquiring a fourth dry-heating prevention temperature value according to the current firepower of the cooker and the heat conductivity of the cooker, and setting the fourth dry-heating prevention temperature value as a current dry-heating prevention temperature threshold value of the cooker;

the fourth dry burning prevention temperature value is greater than the third dry burning prevention temperature value.

In some embodiments, the alarm temperature threshold of the stove comprises a plurality of different alarm temperature thresholds, the plurality of alarm temperature thresholds and the dry burning prevention temperature threshold of the stove define a plurality of alarm ranges, the alarm information comprises a plurality of alarm information, and each alarm range corresponds to one alarm information; control the cooking utensils send with the alarm information that the current warning temperature threshold value of cooking utensils corresponds includes:

and controlling the cooker to send out alarm information corresponding to the alarm range according to the alarm range where the temperature of the cooker is.

In certain embodiments, the control method comprises:

receiving an alarm termination instruction;

and controlling the kitchen range to stop sending the alarm information according to the alarm termination instruction.

In certain embodiments, the control method comprises:

receiving an alarm function opening instruction or an alarm function closing instruction;

controlling the cooker to send out the alarm information when the temperature of the cooker is greater than the current alarm temperature threshold of the cooker according to the alarm function starting instruction;

according to alarm function closes the instruction, does not judge whether the temperature of pan is greater than the current warning temperature threshold value of cooking utensils, or be in the temperature of pan is greater than when the current warning temperature threshold value of cooking utensils, control cooking utensils do not send alarm information.

The embodiment of the invention also provides an anti-dry burning system, which comprises a control device and a stove, wherein the control device is connected with the stove and is used for the steps of the control method of any one of the above embodiments.

In the dry burning prevention system of the embodiment of the invention, the corresponding alarm temperature threshold value of the cooker and the dry burning prevention temperature threshold value of the cooker are obtained according to the cooking state of the cooker and the firepower of the cooker, the cooker is controlled to send alarm information corresponding to the alarm temperature threshold value when the temperature of the cooker is greater than the alarm temperature threshold value, and the cooker is controlled to be closed when the temperature of the cooker is greater than the dry burning prevention temperature threshold value, so that more accurate alarm temperature threshold value and dry burning prevention temperature threshold value can be obtained according to the cooking state of the cooker and different firepower of the cooker to prevent the cooker from being misjudged due to dry burning prevention, and the cooker can timely inform a user of paying attention to the cooking condition of the cooker before or just before dry burning occurs, and the user experience is good.

Additional aspects and advantages of embodiments 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 embodiments 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 flowchart of a dry-fire prevention control method according to an embodiment of the present invention.

Fig. 2 is a scene schematic diagram of the dry burning prevention system according to the embodiment of the present invention.

Fig. 3 is a schematic block diagram of an anti-dry heating system according to an embodiment of the present invention.

Fig. 4 is another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 5 is a graph of the temperature of the pot over time with the pot in a water cooking state.

Fig. 6 is a graph of the temperature of the pot over time when the pot is in a no water cooking state.

Fig. 7 is still another flowchart of the dry-fire prevention control method according to the embodiment of the present invention.

Fig. 8 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 9 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 10 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 11 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 12 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 13 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Fig. 14 is still another flowchart of the dry burning prevention control method according to the embodiment of the present invention.

Description of the main element symbols:

the dry-heating prevention system 100, the cooker 20, the pot 30, the temperature sensor 40, the control device 50 and the fire power detection sensor 60.

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 or similar 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.

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; 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 embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, embodiments of the invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 to 3, a dry-burning prevention control method according to an embodiment of the present invention is applied to a cooker 20. The control method for preventing dry burning comprises the following steps:

step S10, collecting the temperature of the pot 30 and the current firepower of the cooker 20;

step S20, determining the cooking state of the cooker 20 according to the temperature of the cooker 30;

step S30, obtaining the current dry burning prevention temperature threshold value of the corresponding kitchen range 20 according to the cooking state of the kitchen range 20 and the current firepower of the kitchen range 20;

step S40, judging whether the temperature of the pot 30 is larger than the current dry-burning prevention temperature threshold value of the stove 20;

if the temperature of the pot 30 is greater than the current dry burning prevention temperature threshold of the cooker 20, step S50, controlling the cooker 20 to be closed;

step S60, acquiring a current alarm temperature threshold of the corresponding kitchen range 20 according to the cooking state of the kitchen range 20 and the current firepower of the kitchen range 20;

step S70, judging whether the temperature of the pot 30 is larger than the current alarm temperature threshold value of the cooker 20;

if the temperature of the pot 30 is greater than the current alarm temperature threshold of the cooker 20, step S80, the cooker 20 is controlled to send out alarm information corresponding to the current alarm temperature threshold of the cooker 20. Step S50, obtaining the current dry burning prevention temperature threshold value of the corresponding kitchen range 20 according to the cooking state of the kitchen range 20 and the current firepower of the kitchen range 20;

the dry burning prevention system 100 of the embodiment of the invention comprises a cooker 20 and a control device 50, wherein the control device 50 is connected with the cooker 20. As an example, the dry burning prevention control method according to the embodiment of the present invention may be implemented by the dry burning prevention system 100 according to the embodiment of the present invention, and is applied to the cooker 20.

The steps S10, S20, S30, S40, S50, S60, S70, and S80 of the dry burning prevention control method according to the embodiment of the present invention may be implemented by the control device 50. That is, the control device 50 is used to collect the temperature of the pot 30 and the current fire power of the cooker 20; determining the cooking state of the cooker 20 according to the temperature of the cooker 30; acquiring a current dry-burning prevention temperature threshold of the corresponding stove 20 according to the cooking state of the stove 20 and the current firepower of the stove 20; judging whether the temperature of the cooker 30 is greater than the current dry burning prevention temperature threshold value of the cooker 20; if the temperature of the cooker 30 is higher than the current dry-burning prevention temperature threshold of the cooker 20, controlling the cooker 20 to be closed; acquiring a current alarm temperature threshold of the corresponding cooker 20 according to the cooking state of the cooker 20 and the current firepower of the cooker 20; judging whether the temperature of the cooker 30 is greater than the current alarm temperature threshold of the cooker 20; and if the temperature of the cooker 30 is higher than the current alarm temperature threshold of the cooker 20, controlling the cooker 20 to send alarm information corresponding to the current alarm temperature threshold of the cooker 20. Wherein, the current dry burning prevention temperature threshold of the cooking range 20 is greater than the current alarm temperature threshold of the cooking range 20.

In the dry burning prevention control method and the dry burning prevention system 100 of the embodiment of the invention, the corresponding alarm temperature threshold of the cooker 20 and the dry burning prevention temperature threshold of the cooker 20 are obtained according to the cooking state of the cooker 20 and the firepower of the cooker 20, the cooker 20 is controlled to be closed when the temperature of the cooker 30 is greater than the dry burning prevention temperature threshold, and the cooker 20 is controlled to send alarm information corresponding to the alarm temperature threshold when the temperature of the cooker 30 is greater than the alarm temperature threshold, so that more accurate alarm temperature threshold and dry burning prevention temperature threshold can be obtained according to the cooking state of the cooker 20 and the firepower of different cookers to prevent the cooker 20 from generating dry burning prevention misjudgment, and the cooker 20 can timely inform a user of paying attention to the cooking condition of the cooker before or when the dry burning occurs, and the user experience is good.

In the example of fig. 1, it is first determined whether the temperature of the pot 30 is greater than the current dry-burning prevention temperature threshold, and when the temperature of the pot 30 is greater than the current dry-burning prevention temperature threshold, the cooking range 20 is directly controlled to be turned off without performing the steps of obtaining the current alarm temperature threshold of the corresponding cooking range 20 according to the cooking state of the cooking range 20 and the current firepower of the cooking range 20 and determining whether the temperature of the pot 30 is greater than the current alarm temperature threshold, so that the arithmetic operation of the control device 50 can be reduced, and the execution efficiency can be improved.

And the step of obtaining the current alarm temperature threshold of the corresponding cooker 20 and judging whether the temperature of the cooker 30 is greater than the current alarm temperature threshold according to the cooking state of the cooker 20 and the current firepower of the cooker 20 is executed when the temperature of the cooker 30 is not greater than the current anti-dry-burning temperature threshold, and the step of sending alarm information corresponding to the current alarm temperature threshold when the temperature of the cooker 30 is greater than the current alarm temperature threshold, and continuing to collect the temperature of the cooker 30 when the temperature of the cooker 30 is not greater than the current alarm temperature threshold, and judging whether the temperature of the cooker 30 is greater than the current anti-dry-burning temperature threshold again, so as to circulate, the cooker 20 is controlled to be closed along with the gradual rise of the temperature of the cooker 30 until the temperature of the cooker 30 is greater than the current anti.

In the embodiment of the present invention, the controlling of the cooking stove 20 to be turned off mainly means controlling the cooking stove 20 to stop heating, for example, when the cooking stove 20 is an electromagnetic stove, the current of the coil is cut off, and when the cooking stove 20 is a gas stove, the control device 50 may send a turn-off instruction to the electromagnetic valve to cut off the gas supply of the cooking stove 20, so as to turn off the burner of the cooking stove 20.

It is noted that while the cooktop 20 is controlled to be closed, in one embodiment, the cooktop 20 is controlled to stop sending alarm information. In another embodiment, the cooker 20 is controlled to continuously send out an alarm message, and the alarm message may be a voice indicating that the cooker is closed, or other prompting methods indicating that the cooker is closed, which is not limited herein.

It should be noted that, in another embodiment, the step of determining whether the temperature of the pot 30 is greater than the current alarm temperature threshold may be executed first, the cooker 20 is controlled to send out alarm information when the temperature of the pot 30 is greater than the current alarm temperature threshold, then the step of determining whether the temperature of the pot 30 is greater than the current dry-burning prevention temperature threshold of the cooker 20 is executed, and the cooker 20 is controlled to be closed when the temperature of the pot 30 is greater than the current dry-burning prevention temperature threshold of the cooker 20 as the temperature gradually rises. While controlling the cooktop 20 to close, in one embodiment, the cooktop 20 is controlled to stop sending alarm information. In another embodiment, the cooker 20 is controlled to continuously send out an alarm message, and the alarm message may be a voice indicating that the cooker 20 is closed, or other prompting methods indicating that the cooker 20 is closed, which is not limited herein.

In yet another embodiment, the step of determining whether the temperature of the pot 30 is greater than the current alarm temperature threshold and the step of determining whether the temperature of the pot 30 is greater than the current dry-burning prevention temperature threshold of the cooker 20 may be simultaneously performed by the control device 50, so that the state of the cooker 20 may be rapidly controlled according to the temperature of the pot 30.

Specifically, in the related art, since the same dry-heating prevention temperature threshold is uniformly used by the cooker 20 no matter what kind of fire is, the dry-heating time that the cooker 20 reaches the dry-heating start temperature threshold when the fire is small is easily long, the dry-heating prevention misjudgment of the cooker 20 when the fire is big is easily caused, and the user cannot be guided to timely handle the cooking condition of the cooker 20 because no early warning function is provided before the cooker 20 is dry-heated. In the embodiment of the present invention, the current alarm temperature threshold of the corresponding cooker 20 and the current dry-burning prevention temperature threshold of the cooker 20 can be obtained according to the cooking state of the cooker 20 and the current fire power of the cooker 20, so that a more accurately determined alarm temperature threshold and dry-burning prevention temperature threshold can be obtained, the cooker 20 has an early warning function, the user can be timely notified to pay attention to the cooking condition of the cooker 20 when the cooker 20 is close to the dry-burning prevention state, the cooker 20 can be controlled to be closed when the temperature of the cooker 30 is greater than the current dry-burning prevention temperature threshold, and the user experience is good.

Referring to fig. 3, the temperature of the pot 30 can be measured by the temperature sensor 40. In one embodiment, the temperature sensor 40 may be disposed on the cooktop 20, for example, the temperature sensor 40 is a dry-fire protection temperature probe of the cooktop 20. The dry-fire prevention temperature probe may be provided in a burner of the cooker 20. The collected temperature of the pot 30 can be understood as temperature data output by the temperature sensor 40 (such as an anti-dry heating temperature probe), and is not necessarily linked to whether the pot 30 is placed on the cooker 20. When the pot 30 is placed on the cooker 20, the pot 30 is elastically abutted against the dry-burning prevention temperature probe, so that the dry-burning prevention temperature probe obtains more accurate temperature of the pot 30.

In another embodiment, the temperature of the pot 30 is detected by a temperature sensor 40 provided at the pot 30. The temperature sensor 40 may be a wireless passive temperature sensor 40. The wireless passive temperature sensor 40 does not need power supply, and can send out the collected temperature data in a wireless mode.

In another embodiment, the temperature sensor 40 may be another temperature sensor 40, the temperature sensor 40 may be disposed in an interlayer of the bottom of the pot body of the pot 30, and the temperature of the pot 30 collected by the temperature sensor 40 may be transmitted to the control device 50 through a temperature signal transmitting unit disposed at the handle of the pot 30.

Referring to fig. 3, in some embodiments, the cooktop 20 includes a fire detection sensor 60, and the fire detection sensor 60 is used for detecting the fire of the cooktop 20. In one embodiment, the cooking range 20 is a gas stove, the fire detection sensor 60 may be a rotatable potentiometer installed on a switch knob post of the cooking range 20, a fire adjustment position of the cooking range 20 is obtained by sensing a resistance, a voltage or a current change of the potentiometer, and the fire of the cooking range 20 is further determined. In another embodiment, the fire detection sensor 60 may be a gas flow rate sensing device installed on a gas pipeline, and the fire of the cooking stove 20 is determined by sensing the flow rate of the gas. In another embodiment, the fire detection sensor 60 may be a gas flow rate sensing device installed on a gas pipeline, and the fire of the cooking range 20 is determined by sensing the flow rate of the gas. In another embodiment, the fire detection sensor 60 may be a gas pressure sensor installed on the gas pipeline, and the fire of the cooking stove 20 is determined by sensing the pressure of the gas. Of course, the cooking hob 20 may also be an induction hob. The heating power of the induction cooker can be judged by detecting the current supplied to the coil or the heating power gear.

Specifically, the firepower P can be divided into a plurality of gears, such as 1 gear, 2 gear, 3 gear, 4 gear, 5 gear, and the like. In one embodiment, the firepower P is divided into 3 stages, the 1 stage is the small fire, the 2 stage is the medium fire, the 3 stage is the large fire, the first preset firepower is P1 and the second preset firepower is P2, such that when the detected firepower P < P1, the current firepower is judged to be the small fire, when the detected firepower P1 ≦ P2, the current firepower is judged to be the medium fire, and when the detected firepower P > P2, the current firepower is judged to be the large fire.

Referring to fig. 4, in some embodiments, the cooking states include a water cooking state and a no water cooking state, and step S20 includes:

step S22, judging whether the pot 30 has boiling section according to the temperature of the pot 30,

if yes, step S24, determining that the cooking range 20 is in the water cooking state;

if not, step S26, determining that the cooking range 20 is in the water-free cooking state.

The control method described above can be implemented by the dry combustion preventing system 100 according to the embodiment of the present invention. The steps S22, S24, and S26 of the dry burning prevention control method according to the embodiment of the present invention may be implemented by the control device 50. That is, the control device 50 is configured to determine whether the pot 30 has a boiling section according to the temperature of the pot 30, and if so, determine that the cooker 20 is in the water cooking state; if not, determining that the cooker 20 is in the waterless cooking state.

In particular, the boiling section of the pot 30 can be understood as the temperature section reached by the pot 30 when the pot 30 is in the boiling stage of the water cooking state. It should be noted that when the water in the pot 30 is boiling, the temperature of the water in the pot 30 is maintained at a stable temperature, and at this time, the temperature of the outer surface of the pot 30 is also maintained at a stable temperature when the heat is transferred to the outer surface of the pot 30. The fluctuation range of the temperature of the outer surface of the pot 30 within the predetermined range can also be understood as being in the boiling section.

Generally, the water cooking can be a water cooking mode with small change of temperature change rate of stewing, boiling, stewing and steaming. The waterless cooking comprises a waterless cooking mode with large change rate of temperature change of frying, stir-frying and frying. When the cooking utensil 20 is in a water cooking state, please refer to fig. 5, and the inventor finds that the temperature-time curves 1 and 2 of the pot 30 have a typical three-stage distribution characteristic, and the temperature-time curve 1 and the temperature-time curve 2 are temperature curves of the pot 30 with respect to temperature and time, respectively: a first stage: when the cooker 20 starts to heat, the temperature of the pot 30 gradually rises; and a second stage: when the water in the pot 30 is boiling, the temperature of the pot 30 is in a constant or approximately constant state, that is, the pot 30 has a boiling section; a third stage: when the water in the pot 30 is dried, the temperature of the pot 30 is increased again. Wherein, for the cookware 30 with good heat conductivity, such as the metal cookware 30, when the water in the pan is boiled, the temperature of the outer surface of the pan bottom is lower, such as 110 ℃ to 130 ℃, as shown in the temperature-time curve 1; for a pot 30 with poor thermal conductivity, such as a casserole, the temperature of the outer surface of the pot bottom is higher when the water in the pot is boiling. E.g., 140 c to 180 c, as shown in temperature time curve 2. When the cooking utensil 20 is in the water-free cooking state, the temperature-time curve 3 is a temperature curve of the temperature and the time of the pot 30 as shown in fig. 6, and the temperature curve 3 of the temperature and the time of the pot 30 has large fluctuation and no obvious rule, that is, in the water-free cooking state, the pot 30 generally has no boiling section.

It should be noted that, obtaining the corresponding current alarm temperature threshold of the cooker 20 according to the cooking state of the cooker 20 and the current fire of the cooker 20 may be understood as establishing a first preset relationship between the fire of the cooker 20 and the alarm temperature threshold of the cooker 20 when the cooker 20 is in the water cooking state in one embodiment. Establishing a second preset relationship between the firepower of the cooker 20 and the alarm temperature threshold of the cooker 20 when the cooker 20 is in the water-free cooking state. The first preset relationship and the second preset relationship may be expressed as a table or a line relation graph, respectively.

In addition, obtaining the current dry burning prevention temperature threshold of the corresponding cooker 20 according to the cooking state of the cooker 20 and the current fire of the cooker 20 may be understood as establishing a third preset relationship between the fire of the cooker 20 and the dry burning prevention temperature threshold of the cooker 20 when the cooker 20 is in the water cooking state in one embodiment. Establishing a fourth preset relationship between the firepower of the cooker 20 and the dry burning prevention temperature threshold of the cooker 20 when the cooker 20 is in the water-free cooking state. The third preset relationship and the fourth preset relationship may be expressed as a table or a line relation graph, respectively.

In the embodiment of the present invention, the alarm temperature threshold of the cooker 20 is positively correlated with the firepower of the cooker 20, that is, the larger the firepower of the cooker 20 is, the larger the alarm temperature threshold of the cooker 20 is. The smaller the firepower of the cooking range 20 is, the smaller the alarm temperature threshold of the cooking range 20 is. When the firepower of the cooker 20 is large, the alarm temperature threshold of the cooker 20 is set to be relatively high, so that the cooker 20 can be prevented from sending alarm information too early. When the firepower of the cooker 20 is small, the dry-burning prevention temperature threshold of the cooker 20 is also set to be relatively low, so that the cooker 20 can be prevented from sending alarm information too late.

In addition, in the embodiment of the present invention, the dry burning prevention temperature threshold of the cooker 20 is directly related to the fire power of the cooker 20, that is, the greater the fire power of the cooker 20, the greater the dry burning prevention temperature threshold of the cooker 20. The smaller the firepower of the cooking range 20 is, the smaller the dry-burning prevention temperature threshold of the cooking range 20 is. When the firepower of the cooker 20 is high, the dry burning prevention temperature threshold of the cooker 20 is correspondingly set to be high, so that the condition that the fire is cut off in advance due to the fact that the cooker 20 judges the dry burning by mistake can be avoided. When the firepower of the cooker 20 is small, the dry-heating prevention temperature threshold of the cooker 20 is correspondingly set to be low, so that the time for the temperature of the cooker 30 to reach the dry-heating prevention temperature threshold can be reduced, and the dry-heating time is prevented from being too long.

It should be noted that, under the same thermal power, the temperature when the cooking range 20 is in the water cooking state to achieve dry burning prevention is relatively low, and the temperature when the cooking range 20 is in the water-free cooking state to achieve dry burning prevention is relatively high, so that the current dry burning prevention temperature threshold of the cooking range 20 corresponding to the water cooking state is lower than the current dry burning prevention temperature threshold of the cooking range 20 corresponding to the water-free cooking state, and similarly, the current alarm temperature threshold of the cooking range 20 corresponding to the water cooking state is lower than the current alarm temperature threshold of the cooking range 20 corresponding to the water-free cooking state.

It is understood that some or all of the functions of the control device 50 according to the embodiment of the present invention may be implemented by a controller or a processor, or a control panel, or a computer board of the cooker 20 itself, or the control device 50 is manufactured as a separate control box or control terminal including the controller, the processor, the control panel, or the computer board, and is installed on the cooker 20, or is installed at another position outside the cooker 20. That is, the dry burning prevention system 100 may be implemented by the cooktop 20 having the control device 50. Therefore, the protection scope of the dry burning prevention system 100 of the present invention also includes the cooking appliance 20 having the function of the control device 50.

Referring to fig. 7, in some embodiments, step S22 includes:

step S522, determining whether the collected temperature quantity of the cookware 30 is greater than a preset quantity;

if yes, step S524, calculating a change rate of the temperature of the pot 30 within a preset time period;

step S525, determining whether the change rate of the temperature of the pot 30 within the preset time is less than or equal to a preset value, if yes, step S526, determining that the pot 30 has a boiling section and taking the current temperature of the pot 30 as the pot boiling temperature of the pot 30; if not, step S528 determines that the pot 30 has no boiling section.

The control method of the present embodiment can be realized by the dry burning prevention system 100 of the present embodiment, wherein the control device 50 can realize steps S522, S524, S525, S526, and S528 of the dry burning prevention control method of the present embodiment. That is, the control device 50 is used to determine whether the collected temperature number of the cookware 30 is greater than a preset number; if so, calculating the change rate of the temperature of the pot 30 within the preset time; judging whether the change rate of the temperature of the pot 30 in the preset time is smaller than or equal to a preset value, if so, determining that the pot 30 has a boiling section and taking the current temperature of the pot 30 as the pot boiling temperature of the pot 30; if not, determining that the pot 30 does not have the pot boiling temperature.

The control method of the above embodiment determines whether the pot 30 has the boiling section by calculating the change rate of the temperature of the pot 30 within the preset time period, so that the cooking state of the cooker 20 can be accurately and quickly determined and the pot boiling temperature of the pot 30 can be obtained.

It should be noted that the rate of change of the temperature of the pot 30 within the preset time period in the present embodiment can be obtained by any one of the following embodiments.

The sum of absolute values of differences between the temperatures of the pots 30 in the preset time period and the average value of the temperatures of the pots 30 in the preset time period;

the slope of the temperature of the pot 30 versus time within a preset duration;

variance of temperature of the pot 30 within a preset time period;

the standard deviation of the temperature of the pot 30 within a preset time period.

Specifically, the change rate of the temperature of the pot 30 in the preset time period in the present embodiment may be obtained by the sum of the absolute values of the differences between the temperature of the pot 30 in the preset time period and the average value of the temperatures of the pot 30 in the preset time period. In one embodiment, the temperature T of the pot 30 is collected_kWhen the number is larger than the preset value N (namely k is larger than N), calculating T_k-NTo T_kThe sum of the absolute values of the differences between the average temperature value of the pots 30 and the single temperature Ti of the pots 30 in the preset time period can be represented as: SUB ═ Σ | Ti — Tmean | (i ═ k-N to k), and large SUB indicates large temperature change. When the SUB is less than or equal to the preset value, it indicates that the temperature change of the pot 30 is small, and it can be considered that the pot 30 is in a water cooking state such as stewing, boiling, stewing, steaming, etc. and the water is boiling, the cooker 20 is in a water cooking state, and the current temperature data T of the pot 30 at this time is used_kAs boiling temperature T of pot_b. It should be noted that when the current temperature T of the pot 30 is measured_kAs boiling temperature T of pot_bThat is, T_b＝T_kThereafter, if SUB is larger than the preset value, the pot 30 is also considered to be in the water cooking state.

It should be noted that the preset time length may be set to different values, and accordingly, according to an actual situation, the size of the preset value may also be correspondingly adjusted to a preset value corresponding to the time length of the preset time length, which is not limited herein. In one example, the preset time period may be 2 minutes, the temperature data of one pot 30 is collected every two seconds, the value of N may be 60, the preset value may be 10, and if k is 80, T is_k-NTo T_kThe data of the temperatures of N +1 pots 30 in the interval (b) can be understood as: t20 to T80 totaled 61 pot 30 temperature data within 2 minutes. It is to be understood that these specific values and the specific values recited in the following detailed description are merely exemplary in nature and are not to be construed as limiting the present invention. Since the temperature data of the pots 30 are acquired every other time period, when the temperature data of a certain number of pots 30 are acquired, there is a time period for acquiring the temperature data of the number of pots 30 accordingly. That is, the specific value of the preset time period can be associated with the required temperature amount of the pot 30.

Specifically, the change rate of the temperature of the pot 30 in the preset time period in the present embodiment can be realized by the slope of the temperature of the pot 30 in the preset time period with respect to time. In one embodiment, the temperature T of the pot 30 is collected_kWhen the number is larger than a preset value N (namely k is larger than N), T is in a preset time length_k-NTo T_kWithin the interval of (2), obtain the linear fitting T_k-NTo T_kThe slope of the temperature of the pot 30 changing along with the time to the time is obtained by fitting, namely, y is ax + b, if a is smaller than or equal to the preset slope, the pot 30 is judged to be in a water cooking state such as stewing, boiling, stewing, steaming and the like, the water is boiled, the stove 20 is judged to be in the water cooking state, and the temperature data T at the moment is used_kAs boiling temperature T of pot_b. It should be noted that when the current temperature T of the pot 30 is measured_kAs boiling temperature T of pot_bThat is, T_b＝T_kAnd then if a is larger than the preset slope, identifyingThe pot 30 is in a water cooking state.

Specifically, the rate of change of the temperature of the pot 30 within the preset time period in the present embodiment may be realized by the variance of the temperature of the pot 30 within the preset time period. In one embodiment, the temperature data T is collected as_kWhen the number is larger than a preset value N (namely k is larger than N), T in the preset time length is calculated_k-NTo T_kThe Variance (VA) of the N +1 temperature data in the interval (b), wherein a large VA indicates a large temperature change of the pot 30. When VA is less than or equal to the preset value (the temperature change of the pot 30 is small), namely the pot 30 is in a cooking state with water such as stewing, boiling, stewing, steaming and the like, and the water is boiled, the temperature data T at the moment is obtained_kAs boiling temperature T of pot_b. It should be noted that when the current temperature T of the pot 30 is measured_kAs boiling temperature T of pot_bThat is, T_b＝T_kThereafter, if VA is greater than the predetermined value, the pot 30 is also considered to be in the water cooking state.

Specifically, the rate of change of the temperature of the pot 30 within the preset time period in the present embodiment may be realized by the standard deviation of the temperature of the pot 30 within the preset time period. In one embodiment, the temperature data T is collected as_kWhen the number is larger than a preset value N (namely k is larger than N), T in the preset time length is calculated_k-NTo T_kN +1 standard deviations (STD) of the temperature data in the interval(s), a large STD indicates a large temperature change of the pot 30. When the STD is less than or equal to the preset value (the temperature change of the pot 30 is small), namely the pot 30 is in a cooking state with water such as stewing, boiling, stewing, steaming and the like and the water is boiled, the temperature data T at the moment is used_kAs boiling temperature T of pot_b. It should be noted that when the current temperature T of the pot 30 is measured_kAs boiling temperature T of pot_bThat is, T_b＝T_kThereafter, if the STD is greater than the preset value, the pot 30 is also considered to be in the water cooking state.

Referring to fig. 8, in some embodiments, step S30 includes:

step S32, when the cooking range 20 is in a water cooking state, obtaining a first alarm temperature value according to the current firepower of the cooking range 20, and setting the first alarm temperature value as the current alarm temperature threshold value of the cooking range 20;

and step S34, when the cooking range 20 is in a water-free cooking state, acquiring a second alarm temperature value according to the current firepower of the cooking range 20, and setting the second alarm temperature value as the current alarm temperature threshold of the cooking range 20.

The control method of the present embodiment may be implemented by the dry burning prevention system 100 of the present embodiment, wherein the control device 50 may implement steps S32 and S34 of the dry burning prevention control method of the present embodiment. That is, the control device 50 is configured to obtain a first alarm temperature value according to the current fire power of the cooker 20 when the cooker 20 is in a water cooking state, and set the first alarm temperature value as the current alarm temperature threshold of the cooker 20; when the cooker 20 is in a water-free cooking state, acquiring a second alarm temperature value according to the current firepower of the cooker 20, and setting the second alarm temperature value as the current alarm temperature threshold value of the cooker 20; and the second alarm temperature value is greater than the first alarm temperature value.

Specifically, when the pot 30 is in a cooking state with water, such as stewing, boiling, cooking, steaming, etc., the temperature of the pot 30 is lower when the pot 30 reaches dry-cooking, so in the present embodiment, the first alarm temperature value may be obtained according to a first preset relationship between the current firepower of the cooker 20 and the alarm temperature threshold, and the first alarm temperature value is set as the alarm temperature threshold of the cooker 20. It should be noted that the number of the first alarm temperature values may be multiple, that is, the first alarm temperature values correspond to different first alarm temperature values under different firepowers.

When the pot 30 is in the water-free cooking state such as frying, stir-frying, or deep-frying, the temperature of the pot 30 is higher when the pot 30 reaches the dry-cooking state, so in this embodiment, the second alarm temperature value can be obtained according to the second preset relationship between the current firepower of the cooker 20 and the alarm temperature threshold value, and the second alarm temperature value is set as the alarm temperature threshold value of the cooker 20. It should be noted that the number of the second alarm temperature values may be multiple, that is, the second alarm temperature values correspond to different firepower.

Referring to fig. 8, in some embodiments, step S50 includes:

step S52, when the cooking range 20 is in a water cooking state, obtaining a first dry burning prevention temperature value according to the current firepower of the cooking range 20, and setting the first dry burning prevention temperature value as the current dry burning prevention temperature threshold value of the cooking range 20;

and step S54, when the cooking range 20 is in a water-free cooking state, acquiring a second dry burning prevention temperature value according to the current firepower of the cooking range 20, and setting the second dry burning prevention temperature value as the current dry burning prevention temperature threshold of the cooking range 20.

The control method of the present embodiment may be implemented by the dry burning prevention system 100 of the present embodiment, wherein the control device 50 may implement steps S52 and S54 of the dry burning prevention control method of the present embodiment. That is, the control device 50 is configured to obtain a first dry burning prevention temperature value according to the current fire power of the cooking range 20 when the cooking range 20 is in a water cooking state, and set the first dry burning prevention temperature value as a current dry burning prevention temperature threshold of the cooking range 20; when the stove 20 is in a water-free cooking state, acquiring a second dry burning prevention temperature value according to the current firepower of the stove 20, and setting the second dry burning prevention temperature value as a current dry burning prevention temperature threshold value of the stove 20; and the second dry heating prevention temperature value is greater than the first dry heating prevention temperature value.

Specifically, when the pot 30 is in a cooking state with water, such as stewing, boiling, cooking, steaming, etc., the temperature of the pot 30 is lower when the pot 30 reaches dry heating, so in the present embodiment, the first dry heating prevention temperature value may be obtained according to a third preset relationship between the current fire of the cooker 20 and the dry heating prevention temperature threshold, and the first dry heating prevention temperature value is set as the dry heating prevention temperature threshold of the cooker 20. It should be noted that the number of the first anti-dry heating temperature values may be multiple, that is, different first anti-dry heating temperature values are corresponding to different firepowers.

When the pot 30 is in the water-free cooking state such as frying, stir-frying, or deep-frying, and the temperature of the pot 30 is higher when the pot 30 reaches dry heating, in this embodiment, a second dry heating prevention temperature value may be obtained according to a fourth preset relationship between the current firepower of the cooker 20 and the dry heating prevention temperature threshold, and the second dry heating prevention temperature value is set as the dry heating prevention temperature threshold of the cooker 20. It should be noted that the number of the second anti-dry heating temperature values may be multiple, that is, different second anti-dry heating temperature values are corresponding to different firepowers.

It should be noted that, when the collected number of temperatures of the cookware 30 is less than or equal to the preset number, at this time, the collected number of temperatures of the cookware 30 is not enough to determine the specific cooking state of the cooker 20, in this case, step S510 is entered, the second alarm temperature value is set as the current alarm temperature threshold of the cooker 20, and the second anti-dry-burning temperature value is set as the current anti-dry-burning temperature threshold of the cooker 20. That is, the current alarm temperature threshold and the current dry-burning prevention temperature threshold of the cooker 20 are obtained by the control strategy of the waterless cooking state.

Referring to fig. 9, in some embodiments, the control method includes: step S130, when the cooking range 20 is in a water cooking state, acquiring the thermal conductivity of the pot 30 according to the temperature of the pot 30, and acquiring the corresponding current alarm temperature threshold of the cooking range 20 and the current dry-burning prevention temperature threshold of the cooking range 20 according to the current firepower of the cooking range 20 and the thermal conductivity of the pot 30.

The control method may be implemented by the dry burning prevention system 100 according to the embodiment of the present invention, wherein the step S130 of the dry burning prevention control method according to the embodiment of the present invention may be implemented by the control device 50. That is, the control device 50 is configured to obtain the thermal conductivity of the pot 30 according to the temperature of the pot 30 when the cooker 20 is in the water cooking state, and obtain the current alarm temperature threshold of the corresponding cooker 20 and the current dry-burning prevention temperature threshold of the cooker 20 according to the current fire power of the cooker 20 and the thermal conductivity of the pot 30.

Therefore, when the cooker 20 is in the water cooking state, the corresponding alarm temperature threshold and the dry burning prevention temperature threshold are obtained according to the current firepower of the cooker 20 and the heat conductivity of the cooker 30, so that the more suitable current alarm temperature threshold and the current dry burning prevention temperature threshold can be obtained, the cooker 20 can timely inform a user of paying attention to the cooking state of the cooker 20 and accurately start the dry burning prevention function when the cooker 20 reaches the dry burning prevention state, and misjudgment is avoided.

Referring to fig. 10, in some embodiments, step S130 includes:

step S132, determining whether the pot boiling temperature of the pot 30 is less than or equal to the preset heat conducting temperature,

if yes, step S134, obtaining a third alarm temperature value according to the current firepower of the cooker 20 and the thermal conductivity of the pot 30, and setting the third alarm temperature value as the current alarm temperature threshold of the cooker 20;

if not, step S136, obtaining a fourth alarm temperature value according to the current firepower of the cooker 20 and the thermal conductivity of the pot 30, and setting the fourth alarm temperature value as the current alarm temperature threshold of the cooker 20.

The control method described above can be implemented by the dry burning prevention system 100 according to the embodiment of the present invention, wherein steps S132, S134, and S136 of the dry burning prevention control method according to the embodiment of the present invention can be implemented by the control device 50. That is, the control device 50 is configured to determine whether the pot boiling temperature of the pot 30 is less than or equal to a preset heat conduction temperature, and if so, obtain a third alarm temperature value according to the current firepower of the stove 20 and the heat conductivity of the pot 30 and set the third alarm temperature value as the current alarm temperature threshold of the stove 20; if not, acquiring a fourth alarm temperature value according to the current firepower of the cooker 20 and the heat conductivity of the cooker 30 and setting the fourth alarm temperature value as the current alarm temperature threshold value of the cooker 20; and the fourth alarm temperature value is greater than the third alarm temperature value.

Referring to fig. 10, in some embodiments, step S130 includes:

if yes, step S135, obtaining a third dry-burning prevention temperature value according to the current firepower of the cooker 20 and the thermal conductivity of the pot 30, and setting the third dry-burning prevention temperature value as a current dry-burning prevention temperature threshold value of the cooker 20;

if not, step S137, obtaining a fourth dry-heating prevention temperature value according to the current firepower of the cooker 20 and the thermal conductivity of the pot 30, and setting the fourth dry-heating prevention temperature value as the current dry-heating prevention temperature threshold of the cooker 20.

The control method described above can be realized by the dry burning prevention system 100 according to the embodiment of the present invention, wherein steps S132, S135, and S137 of the dry burning prevention control method according to the embodiment of the present invention can be realized by the control device 50. That is, the control device 50 is configured to determine whether the pot boiling temperature of the pot 30 is less than or equal to the preset heat conduction temperature, and if so, obtain a third dry-burning prevention temperature value according to the current firepower of the stove 20 and the heat conductivity of the pot 30 and set the third dry-burning prevention temperature value as the current dry-burning prevention temperature threshold of the stove 20; if not, acquiring a fourth dry-heating prevention temperature value according to the current firepower of the cooker 20 and the heat conductivity of the cooker 30, and setting the fourth dry-heating prevention temperature value as a current dry-heating prevention temperature threshold value of the cooker 20; and the fourth dry burning prevention temperature value is greater than the third dry burning prevention temperature value.

Therefore, the cooker 20 can inform the user of the cooking state of the cooker 20 in time and can accurately start the dry burning prevention function when the cooker 20 reaches the dry burning prevention state, so as to avoid misjudgment.

Specifically, in the water cooking state, the pot boiling temperature Tb of the pot 30 with better thermal conductivity is smaller when cooking, so that the thermal conductivity of the pot 30 is better under the fire power of the same stove 20, and the set dry-burning prevention temperature threshold value and the alarm temperature threshold value are also lower. It should be noted that the temperature rise speed of the bottom of the pot 30 is the fastest at the time of a big fire, the temperature rise speed of the bottom of the pot 30 is the second highest at the time of a middle fire, and the temperature rise speed of the bottom of the pot 30 is the slowest at the time of a small fire. Therefore, in order to reduce the dry burning time in the middle fire and the small fire, a dry burning prevention temperature threshold value and an alarm temperature threshold value which are lower than those in the large fire can be set. That is, the smaller the thermal conductivity of the same pot 30, the lower the dry heating prevention temperature threshold and the alarm temperature threshold are set.

Referring to fig. 5, for a pot 30 with good thermal conductivity, such as a metal pot 30, when the water in the pot is boiling, the temperature of the outer surface of the pot bottom is lower, for example, 110 ℃ to 130 ℃, as shown in the temperature-time curve 1; for a pot 30 with poor thermal conductivity, such as a casserole, the temperature of the outer surface of the pot bottom is higher when the water in the pot is boiling. E.g., 140 c to 180 c, as shown in temperature time curve 2. Therefore, the type of the pot 30 can be determined by comparing the boiling temperature of the pot during boiling with the preset heat conducting temperature. The preset heat conduction temperature can be calibrated according to the heat conductivity of the pot 30. Further, under the fire power of the same cooker 20, different alarm temperature thresholds and dry burning prevention temperature thresholds can be determined by comparing the boiling temperature of the cooker with the preset heat conduction temperature, so that the cooker 20 can timely inform a user of paying attention to the cooking state of the cooker 20 and accurately start the dry burning prevention function when the cooker 20 reaches the dry burning prevention state, thereby avoiding misjudgment and having good user experience.

In certain embodiments, step S42 includes: the control cooking utensil 20 sends out alarm information once every first preset duration, and every time the alarm information lasts for second preset duration.

The dry burning prevention control method can be realized by the dry burning prevention system 100 according to the embodiment of the present invention. The control method described above may be implemented by the control device 50. That is to say, the control device 50 is used for controlling the cooking utensil 20 to send out the alarm information once every first preset duration, and the alarm information lasts for the second preset duration every time. In this way, the user can be quickly and efficiently informed about the cooking situation of the hob 20.

Specifically, in one embodiment, the alarm information may be an alarm sound emitted by a buzzer of the cooker 20, and the alarm sound may be given every 60 seconds for 3 seconds.

In some embodiments, the alarm temperature threshold of the cooker 20 includes a plurality of different alarm temperature thresholds, the plurality of alarm temperature thresholds and the dry burning prevention temperature threshold of the cooker 20 define a plurality of alarm ranges, the alarm information includes a plurality of alarm information, and each alarm range corresponds to one alarm information; the control cooking utensils 20 send alarm information, include: and controlling the cooker 20 to send alarm information corresponding to the alarm range according to the alarm range of the temperature of the cooker 30.

The control method described above may be implemented by the control device 50. That is, the control device 50 is used for controlling the cooker 20 to send out alarm information corresponding to the alarm range according to the alarm range where the temperature of the cooker 30 is.

So, the alarm range of the temperature of pan 30 is located sends the alarm information that corresponds with the alarm range with control cooking utensils 20, can let the user learn the dry combustion method state of cooking utensils 20 through the alarm information that corresponds like this to in time make the processing, user experience nature is good.

Specifically, in one embodiment, the alarm temperature thresholds of the cooktop 20 respectively include a first alarm temperature threshold a and a second alarm temperature threshold B, where the first alarm temperature threshold a is less than the second alarm temperature threshold B. The first alarm temperature threshold value A, the second alarm temperature threshold value B and the dry burning prevention temperature threshold value C of the stove 20 jointly define two alarm ranges [ A, B ] and [ B, C ]. When the temperature of the cooker 30 is in the alarm range [ a, B ], the cooker 20 is controlled to send out a first alarm message, for example, the alarm sound is given out every 60 seconds, and lasts for 3 seconds each time. When the temperature of the pot 30 is in the alarm range [ B, C ], the cooker 20 is controlled to send out second alarm information, for example, the alarm sound alarms once every 30 seconds, lasts 3 seconds each time, and along with the continuous rise of the temperature of the pot 30, when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold value, the cooker 20 can be controlled to be closed and stop sending out alarm information.

In some embodiments, the frequency of the warning message sent by the cooker 20 is positively correlated with the temperature of the warning range. Specifically, the higher the temperature of the alarm range is, the more frequently the cookers 20 send out alarm information. In one embodiment, when the temperature of the pot 30 falls within the alarm range of [210, 220), the alarm sound is alarmed once every 60 seconds, each for 3 seconds. When the temperature of the cookware 30 falls within the alarm range of [220, 230 ], the alarm sound alarms once every 30 seconds, and lasts for 3 seconds each time. When the temperature of the pot 30 falls within the alarm range of [230, 240 ], the alarm sound is given every 15 seconds, lasting 3 seconds each time.

In some embodiments, the alert information includes a sound having a frequency that is positively correlated with the temperature of the alert range. Specifically, the higher the temperature of the alarm range, the higher the frequency of the sound. In one embodiment, the alarm information is an alarm sound. When the temperature of the cookware 30 is within the alarm range of 210, 220, the alarm sound is given once every 60 seconds, and lasts for 3 seconds each time, and the alarm sound is low-frequency sound. When the temperature of the cookware 30 is in the alarm range of (220, 230), the alarm sound is given once every 30 seconds, and lasts for 3 seconds each time, and the alarm sound is a medium-frequency sound. When the temperature of the cooker 30 is within the alarm range of 230, 240), the alarm sound is given once every 15 seconds, lasting 3 seconds each time, and the alarm sound is high-frequency sound.

In some embodiments, the alert information includes a light having a flashing frequency that is positively correlated with the temperature of the alert range. Specifically, the higher the temperature of the alarm range, the higher the blinking frequency of the light. In one embodiment, the alarm information is light emitted from an alarm display lamp. When the temperature of the cooker 30 falls within the alarm range of 210, 220, the alarm display lamp flashes every 60 seconds, lasting 3 seconds each time. When the temperature of the cooker 30 falls within the alarm range of [220, 230 ], the alarm display lamp flashes once every 30 seconds, lasting 3 seconds each time. When the temperature of the pot 30 falls within the alarm range of [230, 240 ], the alarm display lamp flashes every 15 seconds, lasting 3 seconds each time.

It should be noted that, when the temperature of the pot 30 is greater than the current alarm temperature threshold of the cooker 20, in one embodiment, the cooker 20 may be controlled to simultaneously emit an alarm sound and flash an alarm display lamp. In another embodiment, only the cooking range 20 is controlled to emit an alarm sound at the same time, for example, a preset voice "please note pot temperature, prevent dry burning" is emitted. In yet another embodiment, only cooktop 20 is controlled to flash an alarm display light, e.g., an alarm display light flashes red in an alarm. The alarm information may be set according to the actual needs of the user, and is not limited herein.

Referring to fig. 11, in some embodiments, the control method includes:

step S210, receiving an alarm termination instruction;

and step S220, controlling the kitchen range 20 to stop sending alarm information according to the alarm termination instruction.

The control method described above can be implemented by the dry combustion preventing system 100 according to the embodiment of the present invention. Here, steps S210 and S220 of the dry-burning prevention control method according to the embodiment of the present invention may be implemented by the control device 50. That is, the control device 50 is configured to receive an alarm termination instruction; and controlling the stove 20 to stop sending alarm information according to the alarm termination instruction.

Therefore, the alarm of the cooker 20 can be flexibly controlled according to the user requirements, and the user experience is good.

Specifically, a button or a knob may be disposed on the cooker 20, and after a user presses the button or rotates the knob, the alarm of the cooker 20 may be released within a preset time (e.g., 2 seconds), and then automatically returns to the state to be alarmed. In one embodiment, the warning knob of the cooktop 20 may be shared with the ignition knob.

Referring to fig. 12, in some embodiments, the control method further includes: step S230, receiving an alarm function starting instruction;

step S240, according to the alarm function starting instruction, the step S10 is carried out;

the control method described above can be implemented by the dry combustion preventing system 100 according to the embodiment of the present invention. Step S230 of the dry-burning prevention control method according to the embodiment of the present invention may be implemented by the control device 50. That is, the control device 50 is configured to receive an alarm function activation instruction; the process proceeds to step S10, where the temperature of the pot 30 and the current fire power of the cooker 20 are collected.

Therefore, the cooker 20 can be controlled to send alarm information according to the alarm function opening instruction, so that the requirements of users are easily met, and the user experience is good.

It should be noted that, in the embodiment of the present invention, an alarm function button may be disposed on the kitchen range 20, and when the kitchen range 20 leaves a factory, the alarm function is turned off by default. Under the condition that the alarm function is closed, when the alarm function key is operated, the cooker 20 generates an alarm function opening instruction, the control device 50 can receive the alarm function opening instruction, judge whether the temperature of the cooker 30 is greater than the current alarm temperature threshold of the cooker 20, and control the cooker 20 to send out alarm information when the temperature of the cooker 30 is greater than the current alarm temperature threshold of the cooker 20. Under the condition that the alarm function is started, when the alarm function key is operated, the cooker 20 generates an alarm function closing instruction, the control device 50 can receive the alarm function closing instruction, does not judge whether the temperature of the cooker 30 is greater than the current alarm temperature threshold of the cooker 20, or controls the cooker 20 not to send alarm information when the temperature of the cooker 30 is greater than the current alarm temperature threshold of the cooker 20. It is understood that in other embodiments, the warning function may be turned on by default when the cooktop 20 leaves the factory. In other embodiments, an alarm function on button and an alarm function off button may be provided on the cooktop 20.

Further, an alarm volume button may be disposed on the cooker 20, and a user may adjust the volume of the sound emitted during the alarm by adjusting the alarm volume button.

Specifically, in a specific practical application scenario, a corresponding alarm temperature threshold and an anti-dry-heating temperature threshold are obtained according to a cooking state of the pot 30, a thermal conductivity of the pot 30, and a current firepower of the pot 30.

In the first, second, and third embodiments, the cooker 30 is in a water cooking state, and when the boiling temperature of the cooker is less than or equal to the preset heat conducting temperature, the cooker 20 is in different firepower.

The first embodiment is as follows: when the cooktop 20 is on a big fire, the dry-fire prevention temperature threshold may be set at T10-210 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T11 ═ 170 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T11, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T10, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to T11 ═ 170 ℃ and T12 ═ 190 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T11 and less than or equal to T12, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T12 and less than or equal to T10, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T10, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Example two: when the cooktop 20 is on a medium fire, the dry-fire prevention temperature threshold may be set at 200 ℃ T20. When the alarm temperature is one, the alarm temperature threshold may be set to T21-160 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T21, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T20, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to 160 ℃ at T21 and 180 ℃ at T22. When the temperature of the pot 30 is greater than the alarm temperature threshold T21 and less than or equal to T22, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T22 and less than or equal to T20, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T20, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Example three: when the cooktop 20 is on a small fire, the dry-fire prevention temperature threshold may be set at T30-190 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T31 ═ 150 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T31, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T30, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to 150 ℃ at T31 and 170 ℃ at T32. When the temperature of the pot 30 is greater than the alarm temperature threshold T31 and less than or equal to T32, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T32 and less than or equal to T30, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T30, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

The fourth embodiment, the fifth embodiment and the sixth embodiment are embodiments in which the cooker 30 is in a water cooking state, and when the boiling temperature of the cooker is higher than the preset heat conducting temperature, the cooker 20 is in different firepower.

Example four: when the cooktop 20 is on a big fire, the dry-fire prevention temperature threshold may be set at T40-250 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T41-220 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T41, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T40, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to 220 ℃ T41 and 235 ℃ T42. When the temperature of the pot 30 is greater than the alarm temperature threshold T41 and less than or equal to T42, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T42 and less than or equal to T40, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T40, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Example five: when the cooktop 20 is on a medium fire, the dry-fire prevention temperature threshold may be set at T50-230 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T51 ═ 200 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T51, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T50, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to 200 ℃ at T51 and 215 ℃ at T52. When the temperature of the pot 30 is greater than the alarm temperature threshold T51 and less than or equal to T52, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T52 and less than or equal to T50, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T50, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Example six: when the cooktop 20 is on a small fire, the dry-fire prevention temperature threshold may be set at T60-210 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T61 ═ 180 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T61, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T60, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to T61 ═ 180 ℃ and T62 ═ 195 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T61 and less than or equal to T62, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T62 and less than or equal to T60, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T60, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

The seventh embodiment, the eighth embodiment and the ninth embodiment are embodiments in which the pot 30 is in the water-free cooking state and the cooking range 20 is in different firepower.

Example seven: when the cooktop 20 is on a fire, the dry-fire prevention temperature threshold may be set at T70-290 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to 240 ℃ at T71. When the temperature of the pot 30 is greater than the alarm temperature threshold T71, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T70, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to 240 ℃ at T71 and 260 ℃ at T72. When the temperature of the pot 30 is greater than the alarm temperature threshold T71 and less than or equal to T72, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T72 and less than or equal to T70, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T70, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Example eight: when the cooktop 20 is on a medium fire, the dry-fire prevention temperature threshold may be set at T80-250 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T81 ═ 210 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T81, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T50, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to 210 ℃ at T81 and 230 ℃ at T82. When the temperature of the pot 30 is greater than the alarm temperature threshold T81 and less than or equal to T82, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T82 and less than or equal to T80, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T80, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Example nine: when the cooktop 20 is on a small fire, the dry-fire prevention temperature threshold may be set at T90-210 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T91 ═ 170 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T91, the control device 50 can control the cooker 20 to send out an alarm sound every 60 seconds, the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T90, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to close. When the alarm temperature threshold is two, the alarm temperature threshold may be set to T91 ═ 170 ℃ and T92 ═ 190 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T91 and less than or equal to T92, the control device 50 can control the pot 20 to make an alarm sound every 60 seconds, wherein the alarm sound lasts 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T92 and less than or equal to T90, the control device 50 may control the pot 20 to make an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T90, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

By combining the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment and the ninth embodiment, the following procedure of the control method can be summarized.

Flow one (refer to fig. 13)

A1, opening the cooking range 20.

A2, temperature sensor 40 collects temperature T of pot 30_k。

A3, control 50 determines the cooking state of cooktop 20. If the cooking state is the water cooking state, entering the step A4; if the cooking state is the water-free cooking state, the step A9 is entered.

A4, the control device 50 determines the current heat conductivity of the pot 30.

A5, the control device 50 reads the current firepower P of the pot 30.

A6, the control device 50 determines whether the temperature of the pan 30 detected at present exceeds the dry-heating prevention temperature threshold corresponding to the current fire power and the heat conductivity of the pan 30 when water is present for cooking. If yes, go to step A13; if not, go to step A7.

A7, the control device 50 determines whether the temperature of the pan 30 detected at present exceeds the alarm temperature threshold corresponding to the present heating power and the heat conductivity of the pan 30. If yes, go to step A8; if not, go to step A2.

A8 and the control device 50 control the buzzer to send alarm information corresponding to the alarm temperature threshold value.

A9, the control device 50 reads the current firepower P of the pot 30.

A10, the controller 50 determines whether the temperature of the pot 30 detected at present exceeds the dry-heating prevention temperature threshold corresponding to the present heating power. If yes, go to step A13; if not, go to step A11.

A11, control device 50 determines whether the temperature of pan 30 detected at present exceeds the alarm temperature threshold corresponding to the present heat power during waterless cooking. If yes, go to step A12; if not, go to step A2.

A12 and the control device 50 control the buzzer to send alarm information corresponding to the alarm temperature threshold value.

A13, controlling the cooking range 20 to be closed.

Specifically, in a specific practical application scenario, a corresponding alarm temperature threshold and an anti-dry-heating temperature threshold are obtained according to the cooking state of the pot 30 and the current firepower of the pot 30.

The tenth embodiment, the eleventh embodiment and the twelfth embodiment are embodiments in which the cooker 30 is in a water cooking state, and the cooking range 20 is in different firepower regardless of the heat conductivity of the cooker. Wherein, the boiling temperature of the pot 30 is T_b。

In a tenth embodiment, when the cooktop 20 is on a big fire, the dry-fire prevention temperature threshold may be set to T100 ═ T (T ═ T_b+80) deg.C. When the alarm temperature is one, the alarm temperature threshold may be set to T110 ═ T (T ═ T)_b+50) deg.C. As a pot 30When the temperature is higher than the alarm temperature threshold T110, the control device 50 can control the cooker 20 to send out alarm sound every 60 seconds, the alarm sound lasts for 3 seconds every time, and when the temperature of the cooker 30 is higher than the dry burning prevention temperature threshold T100, the control device 50 stops sending out the alarm sound when controlling the cooker 20 to be closed. When the alarm temperature threshold is two, the alarm temperature threshold may be set to T110 ═ T (T ═ T)_b+50) DEG C and T120 ═ T (T)_b+65) deg.C. When the temperature of the pot 30 is greater than the alarm temperature threshold T110 and less than or equal to T120, the control device 50 may control the pot 20 to generate an alarm sound every 60 seconds, where the alarm sound lasts for 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T120 and less than or equal to T100, the control device 50 may control the pot 20 to send an alarm sound every 30 seconds, where the alarm sound lasts 3 seconds each time and is a high-frequency alarm sound, and the control device 50 stops sending the alarm sound when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T100.

Example eleven: when the cooktop 20 is on a medium fire, the dry-fire prevention temperature threshold may be set at T200 ═ T (T ═ T_b+70) deg.C. When the alarm temperature is one, the alarm temperature threshold may be set to T210 ═ T (T ═ T)_b+40) deg.C. When the temperature of the pot 30 is greater than the alarm temperature threshold T210, the control device 50 may control the cooker 20 to send an alarm sound every 60 seconds, and the alarm sound lasts for 3 seconds each time until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T200, and the control device 50 stops sending the alarm sound when controlling the cooker 20 to be closed. When the alarm temperature threshold is two, the alarm temperature threshold may be set to T210 ═ T (T)_b+40) DEG C and T220 ═ T (T)_b+55) deg.C. When the temperature of the pot 30 is greater than the alarm temperature threshold T210 and less than or equal to T220, the control device 50 may control the pot 20 to generate an alarm sound every 60 seconds, where the alarm sound lasts 3 seconds each time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T220 and less than or equal to T200, the control device 50 may control the pot 20 to emit an alarm sound every 30 seconds, the alarm sound lasts 3 seconds each time, the alarm sound is a high frequency alarm sound, until the temperature of the pot 30 is greater than or equal to T200When the dry-burning prevention temperature threshold value T200 is reached, the control device 50 stops giving out alarm sound when controlling the cooking range 20 to be closed.

Example twelve: when cooktop 20 is on a small fire, the dry-fire prevention temperature threshold may be set at T300-1 (T_b+60) deg.C. When the alarm temperature is one, the alarm temperature threshold may be set to T310 ═ T (T ═ T)_b+30) deg.C. When the temperature of the pot 30 is greater than the alarm temperature threshold T310, the control device 50 may control the pot 20 to send an alarm sound every 60 seconds, where the alarm sound lasts for 3 seconds each time, and when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T300, the control device 50 stops sending the alarm sound when controlling the pot 20 to be closed. When the alarm temperature threshold is two, the alarm temperature threshold may be set to T310 ═ T (T)_b+30) deg.C and T320 ═ T (T)_b+45) deg.C. When the temperature of the pot 30 is greater than the alarm temperature threshold T310 and less than or equal to T320, the control device 50 may control the pot 20 to generate an alarm sound every 60 seconds, where the alarm sound lasts for 3 seconds every time, and the alarm sound is a low-frequency alarm sound. When the temperature of the pot 30 is greater than the alarm temperature threshold T320 and less than or equal to T300, the control device 50 may control the pot 20 to send an alarm sound every 30 seconds, where the alarm sound lasts 3 seconds each time and is a high-frequency alarm sound, and the control device 50 stops sending the alarm sound when the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold T300 and controls the pot 20 to be closed.

It should be noted that, when the pot 30 is in the waterless cooking state, the embodiment in which the cooking range 20 is in different firepowers regardless of the thermal conductivity of the pot is the same as the seventh, eighth and ninth embodiments.

By combining the tenth, eleventh, twelfth, seventh, eighth and ninth embodiments, the flow chart of the control method can be summarized as the second flow chart.

Flow two (refer to fig. 14)

A1, opening the cooking range 20.

A2, temperature sensor 40 collects temperature T of pot 30_k。

A3, control 50 determines the cooking state of cooktop 20. If the cooking state is the water cooking state, entering the step A4; if the cooking is performed without water, the step A8 is proceeded.

A4, the control device 50 reads the current firepower P of the pot 30.

A5, control device 50 determines whether the temperature of pan 30 detected currently exceeds the dry-heating prevention temperature threshold corresponding to the current thermal power when cooking with water. If yes, go to step A12; if not, go to step A6.

A6, the controller 50 determines whether the temperature of the pan 30 currently detected exceeds the alarm temperature threshold corresponding to the current heating power. If yes, go to step A7; if not, go to step A2.

A7 and the control device 50 control the buzzer to send alarm information corresponding to the alarm temperature threshold value.

A8, the control device 50 reads the current firepower P of the pot 30.

A9, control device 50 determines whether the temperature of pan 30 detected currently exceeds the dry-heating prevention temperature threshold corresponding to the waterless cooking. If yes, go to step A12; if not, go to step A10.

A10, control device 50 determines whether the temperature of pan 30 detected at present exceeds the alarm temperature threshold corresponding to the present heat power during waterless cooking. If yes, go to step A11; if not, go to step A2.

A11, control device 50 controls buzzer to alarm information corresponding to alarm temperature threshold.

A12, controlling the cooking range 20 to be closed.

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 having one or more wires (control method), 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 not to 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

1. A control method for preventing dry burning is used for a cooker, and is characterized by comprising the following steps:

collecting the temperature of a cooker and the current firepower of the cooker;

the current dry burning prevention temperature threshold value of the stove is larger than the current alarm temperature threshold value of the stove;

the alarm temperature threshold of the stove comprises a plurality of different alarm temperature thresholds, a plurality of alarm ranges are defined by the alarm temperature thresholds and the anti-dry temperature threshold of the stove, the alarm information comprises a plurality of alarm information, and each alarm range corresponds to one alarm information; control the cooking utensils send with the alarm information that the current warning temperature threshold value of cooking utensils corresponds includes:

2. The control method of claim 1, wherein the cooking states comprise a water cooking state and a no water cooking state, and determining the cooking state of the cooker according to the temperature of the pot comprises:

if so, determining that the stove is in the water cooking state;

if not, determining that the stove is in the waterless cooking state.

3. The control method of claim 2, wherein determining whether a boiling section exists according to the temperature of the pot comprises:

4. The control method according to claim 3, wherein the rate of change of the temperature of the pot over the preset time period comprises at least one of:

the variance of the temperature of the cookware within the preset time length;

5. The control method of claim 2, wherein obtaining a corresponding current alarm temperature threshold of the cooktop according to the cooking state of the cooktop and the current fire of the cooktop comprises:

6. The control method of claim 2, wherein obtaining a corresponding current dry burning prevention temperature threshold of the cooker according to the cooking state of the cooker and the current firepower of the cooker comprises the steps of:

7. The control method according to claim 3, characterized by comprising: work as the cooking utensils are in when having water culinary art state, according to the temperature of pan acquires the heat conductivity of pan, according to the current firepower of cooking utensils with the heat conductivity of pan acquires the correspondence the current warning temperature threshold value of cooking utensils with the current anti-dry burning temperature threshold value of cooking utensils.

8. The control method of claim 7, wherein obtaining the corresponding current alarm temperature threshold of the cooker according to the current fire power of the cooker and the thermal conductivity of the pot comprises:

9. The control method of claim 7, wherein obtaining the corresponding current dry burning prevention temperature threshold value of the cooker according to the current firepower of the cooker and the thermal conductivity of the pot comprises:

10. The control method according to claim 1, characterized by comprising:

11. An anti-dry burning system, which is characterized by comprising a cooker and a control device, wherein the control device is connected with the cooker and is used for realizing the steps of the control method of any one of claims 1 to 10.