CN109237528B

CN109237528B - Dry burning prevention control method and dry burning prevention system

Info

Publication number: CN109237528B
Application number: CN201811026532.7A
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: 2020-06-05
Anticipated expiration: 2038-09-04
Also published as: CN109237528A

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 the pot; determining the cooking state of the cooker according to the temperature of the cooker; acquiring a corresponding dry burning prevention temperature threshold according to the cooking state of the stove; judging whether the temperature of the cooker is greater than an anti-dry-burning temperature threshold value of the cooker or not; if the temperature of the cooker is higher than the dry-burning prevention temperature threshold value of the cooker, controlling the cooker to be closed; acquiring a corresponding alarm temperature threshold according to the cooking state of the cooker; judging whether the temperature of the pot is greater than an alarm temperature threshold value or not; if the temperature of the cooker is greater than the alarm temperature threshold value, the cooker is controlled to send alarm information corresponding to the alarm temperature threshold value. The dry burning prevention control method can accurately acquire the alarm temperature threshold value and the dry burning prevention temperature threshold value of the stove, prevent the dry burning prevention from being judged by mistake, and simultaneously, the stove can inform a user in time before or just before the dry burning occurs, so that the user experience is good.

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 value is uniformly used in the existing dry burning prevention control method, and dry burning occurrence is judged when the temperature of the pot is higher than the dry burning prevention temperature threshold value, so that dry burning prevention misjudgment is easy to occur. 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 is dry-burned for a certain time, food in the pot is easily carbonized, the pot is difficult to clean, and the like, 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 control method for preventing dry burning is used for the kitchen range. The dry burning prevention control method comprises the following steps:

collecting the temperature of the pot;

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

acquiring a corresponding dry burning prevention temperature threshold according to the cooking state of the stove;

judging whether the temperature of the cooker is greater than an anti-dry-burning temperature threshold of the cooker or not;

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

acquiring a corresponding alarm temperature threshold according to the cooking state of the cooker;

judging whether the temperature of the pot is greater than the alarm temperature threshold value or not;

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

and the dry burning prevention temperature threshold of the stove is greater than the alarm temperature threshold.

In the dry burning prevention control method provided by the embodiment of the invention, the corresponding alarm temperature threshold and the dry burning prevention temperature threshold are obtained according to the cooking state of the cooker, the cooker is controlled to send alarm information when the temperature of the cooker is greater than the alarm temperature threshold, and the cooker is controlled to be turned off when the temperature of the cooker is greater than the dry burning prevention temperature threshold, so that the alarm temperature threshold and the dry burning prevention temperature threshold of the cooker can be accurately obtained, the dry burning prevention misjudgment is prevented, meanwhile, the cooker can timely inform a user before or just before dry burning occurs, and the user experience is good.

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 or not 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, the step of determining whether a boiling section exists according to the temperature of the pot comprises the steps of:

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 certain embodiments, the control method comprises:

when the stove is in the water cooking state, setting a first alarm temperature value as an alarm temperature threshold value of the stove, and setting a first dry burning prevention temperature value as a dry burning prevention temperature threshold value of the stove;

when the stove is in the waterless cooking state, setting a second alarm temperature value as an alarm temperature threshold value of the stove, and setting a second dry-burning prevention temperature value as a dry-burning prevention temperature threshold value of the stove;

the first alarm temperature value is smaller than the second alarm temperature value, and the first dry heating prevention temperature value is smaller than the second dry heating 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 heat conductivity of pan acquires correspondingly warning temperature threshold with prevent dry combustion method temperature threshold.

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

judging whether the boiling temperature of the cooker is less than or equal to a preset heat conduction temperature, if so, setting a third alarm temperature value as an alarm temperature threshold of the cooker and setting a third dry burning prevention temperature value as an dry burning prevention temperature threshold of the cooker; if not, setting a fourth alarm temperature value as the alarm temperature threshold of the stove and setting a fourth dry burning prevention temperature value as the dry burning prevention temperature threshold of the stove, wherein the third alarm temperature threshold is smaller than the fourth alarm temperature threshold, and the third dry burning prevention temperature threshold is smaller than the fourth dry burning prevention temperature threshold.

In some embodiments, controlling the cooktop to send an alarm message corresponding to the alarm temperature threshold includes:

and controlling the kitchen range to send the alarm information once every first preset time, wherein the alarm information lasts for a second preset time every time.

In some embodiments, the alarm temperature threshold includes a plurality of different alarm temperature thresholds, the plurality of alarm temperature thresholds and the anti-dry heating temperature threshold define a plurality of alarm ranges, the alarm information includes a plurality of alarm information, and each alarm range corresponds to one alarm information; control the cooking utensils send with alarm information that alarm temperature threshold value 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 some embodiments, the frequency of the alarm information sent by the cooker is positively correlated with the temperature of the alarm range.

In some embodiments, the alarm information includes a sound having a frequency that is positively correlated with the temperature of the alarm range, and/or

The alarm information comprises light, and the flashing frequency of the light is positively correlated with the temperature in the alarm range.

In certain embodiments, the control method comprises:

if the temperature of pan is greater than the dry combustion preventing temperature threshold value of cooking utensils, control cooking utensils stop sending alarm information.

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 some embodiments, the temperature of the pot is obtained from at least one of:

acquiring the temperature of the cookware by using a temperature sensor arranged on the cookware;

the temperature sensor of the pot is used for acquiring the temperature of the pot.

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:

collecting the temperature of the pot;

In the dry burning prevention system of the embodiment of the invention, the corresponding alarm temperature threshold and the dry burning prevention temperature threshold are obtained according to the cooking state of the cooker, the cooker is controlled to send alarm information when the temperature of the cooker is greater than the alarm temperature threshold, and the cooker is controlled to be turned off when the temperature of the cooker is greater than the dry burning prevention temperature threshold, so that the alarm temperature threshold and the dry burning prevention temperature threshold of the cooker can be accurately obtained, the dry burning prevention misjudgment can be prevented, meanwhile, the cooker can timely inform a user before or just before dry burning occurs, and the user experience is good.

In some embodiments, the cooking states include a water cooking state and a no water cooking state, the cooking state of the cooker is determined according to the temperature of the pot, and the control device is configured to:

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 certain embodiments, the control device is configured to:

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

In certain embodiments, the control device is configured to:

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 heat conductivity of pan acquires correspondingly warning temperature threshold with prevent dry combustion method temperature threshold.

In certain embodiments, the control device is configured to:

In some embodiments, the alarm temperature threshold includes a plurality of different alarm temperature thresholds, the plurality of alarm temperature thresholds and the anti-dry heating temperature threshold 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 device is used for:

In certain embodiments, the control device is configured to:

receiving an alarm termination instruction;

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 a flowchart of a dry-heating prevention control method according to an 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.

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;

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

step S30, acquiring a corresponding dry-burning prevention temperature threshold according to the cooking state of the cooker 20;

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

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

step S60, acquiring a corresponding alarm temperature threshold according to the cooking state of the cooker 20;

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

if the temperature of the pot 30 is greater than the alarm temperature threshold, step 80, the cooker 20 is controlled to send out alarm information corresponding to the alarm temperature threshold.

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.

Step S10, step S20, step S30, step S40, step S42, step S50, step S60, step S70, and step S80 of the dry burning prevention control method according to the embodiment of the present invention may be implemented by control device 50. That is, the control device 50 is used for collecting the temperature of the pot 30; acquiring a corresponding dry burning prevention temperature threshold according to the cooking state of the cooker 20; determining the cooking state of the cooker 20 according to the temperature of the cooker 30; judging whether the temperature of the cooker 30 is greater than the dry burning prevention temperature threshold of the cooker 20; if the temperature of the cooker 30 is higher than the dry-burning prevention temperature threshold of the cooker 20, controlling the cooker 20 to be closed; acquiring a corresponding alarm temperature threshold according to the cooking state of the cooker 20; judging whether the temperature of the pot 30 is greater than an alarm temperature threshold value; if the temperature of the pot 30 is greater than the alarm temperature threshold, the cooker 20 is controlled to send out alarm information corresponding to the alarm temperature threshold. Wherein, the dry burning prevention temperature threshold of the stove 20 is greater than the alarm temperature threshold.

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 value and the dry burning prevention temperature threshold value are obtained according to the cooking state 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 value, and the cooker 20 is controlled to send alarm information when the temperature of the cooker 30 is greater than the alarm temperature threshold value, so that the alarm temperature threshold value and the dry burning prevention temperature threshold value of the cooker 20 can be accurately obtained, the dry burning prevention misjudgment can be prevented, meanwhile, the cooker 20 can timely inform a user before or just before 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 dry-heating prevention temperature threshold, and when the temperature of the pot 30 is greater than the dry-heating prevention temperature threshold, the cooking appliance 20 is directly controlled to be turned off without executing the steps of obtaining the corresponding alarm temperature threshold according to the cooking state of the cooking appliance 20 and determining whether the temperature of the pot 30 is greater than the 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 corresponding alarm temperature threshold value according to the cooking state of the cooker 20 and judging whether the temperature of the cooker 30 is greater than the alarm temperature threshold value is executed when the temperature of the cooker 30 is not greater than the dry burning prevention temperature threshold value, and alarm information corresponding to the alarm temperature threshold value is sent out when the temperature of the cooker 30 is greater than the alarm temperature threshold value, and when the temperature of the cooker 30 is not greater than the alarm temperature threshold value, the temperature of the cooker 30 is continuously collected, and whether the temperature of the cooker 30 is greater than the dry burning prevention temperature threshold value is judged again, so that circulation is carried out, 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.

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 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 alarm temperature threshold, then the step of determining whether the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold of the cooker 20 is executed, and the cooker 20 is controlled to be turned off when the temperature of the pot 30 is greater than the 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 alarm temperature threshold and the step of determining whether the temperature of the pot 30 is greater than the 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, 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.

Specifically, since the temperature of the pot 30 is different when the pot 30 reaches the dry-cooking state in different cooking states, the alarm temperature threshold and the dry-cooking prevention temperature threshold can be obtained according to the cooking state of the cooker 20 in the embodiment of the present invention. When the temperature of the cooker 30 is greater than the alarm temperature threshold, the user can be timely informed to pay attention to the cooking condition of the cooker 20, so that the user can timely operate the cooker 20, and the cooker 20 is prevented from being dried. It should be noted that the alarm temperature value of the present embodiment may be set to a value close to the dry-heating prevention temperature threshold value, that is, when the temperature of the pot 30 reaches the alarm temperature, the cooking utensil 20 is already in a state close to dry-heating.

It should be noted that part 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 a control terminal including the controller, the processor, the control panel, or the computer board, and is installed on the cooker 20, or at another location 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.

In one embodiment, if the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold of the cooker 20, the cooker 20 is controlled to stop sending the alarm information. In another embodiment, if the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold of the cooker 20, the cooker 20 is controlled to continue to send out alarm information, and the alarm information may be a voice prompting that the cooker 20 is turned off.

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 a water cooking state;

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

The dry burning prevention control method according to the embodiment of the present invention can be realized by the dry burning prevention 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 used for judging whether the pot 30 has a boiling section according to the temperature of the pot 30, and if so, determining that the cooker 20 is in a water cooking state; if not, determining that the cooking range 20 is in the water-free cooking state.

Therefore, the cooking state of the cooker 20 is determined by judging whether the boiling section of the cooker 30 exists or not, and the cooking state is high in accuracy, simple and easy to obtain.

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 is within a predetermined range, and it can be understood that it is 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 the alarm temperature threshold and the dry-heating prevention temperature threshold corresponding to the water cooking state may be preset. Meanwhile, an alarm temperature threshold and an anti-dry heating temperature threshold corresponding to the waterless cooking state can also be preset. The temperature when the cooking range 20 is in the water cooking state to prevent dry heating is lower, and the temperature when the cooking range 20 is in the water-free cooking state to prevent dry heating is higher, so that the dry heating prevention temperature threshold corresponding to the water cooking state is lower than the dry heating prevention temperature threshold corresponding to the water-free cooking state, and similarly, the alarm temperature threshold corresponding to the water cooking state is lower than the alarm temperature threshold corresponding to the water-free cooking state.

Referring to fig. 7, 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 is measured_kAs boiling temperature T of pot_bThat is, T_b＝T_kHerein, thisThen, if the 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 is measured_kAs boiling temperature T of pot_bThat is, T_b＝T_kThereafter, if a is greater than the predetermined slope, the pot 30 is considered to be in the state of water cookingAnd (4) 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 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 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, the control method includes:

step S110, when the cooking range 20 is in a water cooking state, setting a first alarm temperature value as an alarm temperature threshold value of the cooking range 20, and setting a first dry burning prevention temperature value as a dry burning prevention temperature threshold value of the cooking range 20;

and step S120, when the stove 20 is in a water-free cooking state, setting the second alarm temperature value as the alarm temperature threshold value of the stove 20, and setting the second dry burning prevention temperature value as the dry burning prevention temperature threshold value of the stove 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 the steps S110 and S120 of the dry burning prevention control method of the present embodiment. That is, the control device 50 is configured to set the first alarm temperature value as an alarm temperature threshold of the cooker 20 and set the first dry-heating prevention temperature value as a dry-heating prevention temperature threshold of the cooker 20 when the cooker 20 is in a water cooking state; when the cooking range 20 is in the water-free cooking state, the second alarm temperature value is set as the alarm temperature threshold value of the cooking range 20, and the second dry heating prevention temperature value is set as the dry heating prevention temperature threshold value of the cooking range 20. The first alarm temperature value is smaller than the second alarm temperature value, and the first dry heating prevention temperature value is smaller than the second 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 when the pot 30 reaches dry heating is low, so the first alarm temperature value is set as the alarm temperature threshold value and the first dry heating prevention value is set as the dry heating prevention temperature threshold value in the present embodiment. When the pot 30 is in the water-free cooking state such as frying, stir-frying, frying and the like, the temperature of the pot 30 is higher when the pot 30 reaches the dry-heating state, so in this embodiment, the second alarm temperature value larger than the first alarm temperature value is set as the alarm temperature threshold, and the second dry-heating prevention temperature value larger than the first dry-heating prevention value is set as the dry-heating prevention temperature threshold.

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 alarm temperature threshold of the cooker 20, and the second dry-burning prevention temperature value is set as the dry-burning prevention temperature threshold of the cooker 20. That is, the alarm temperature threshold and the dry-heating prevention temperature threshold of the cooker 20 are obtained by a control strategy of the water-free cooking state.

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

Therefore, when the cooker 20 is in a water cooking state, the corresponding alarm temperature threshold and the dry burning prevention temperature threshold are obtained according to the heat conductivity of the cooker 30, so that a more appropriate alarm temperature threshold and a more appropriate 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 the dry burning prevention function can be accurately started 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, judging whether the boiling temperature of the pot is less than or equal to the preset heat conduction temperature, if so, step S134, setting a third alarm temperature value as an alarm temperature threshold value of the stove 20 and setting a third dry burning prevention temperature value as an dry burning prevention temperature threshold value of the stove 20; if not, step S136, the fourth alarm temperature value is set as the alarm temperature threshold of the cooker 20, and the fourth dry-heating prevention temperature value is set as the dry-heating prevention 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 boiling temperature of the pot is less than or equal to the preset heat conduction temperature, and if so, set the third alarm temperature value as the alarm temperature threshold of the cooker 20 and set the third dry-burning prevention temperature value as the dry-burning prevention temperature threshold of the cooker 20; if not, the fourth alarm temperature value is set as the alarm temperature threshold of the stove 20, and the fourth dry-burning prevention temperature value is set as the dry-burning prevention temperature threshold of the stove 20. And the third alarm temperature threshold is smaller than the fourth alarm temperature threshold, and the third dry-burning prevention temperature threshold is smaller than the fourth dry-burning prevention temperature threshold.

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.

It should be noted that, in the water cooking state, the better the heat conductivity of the pot 30, the lower the pot boiling temperature Tb is during cooking, so the better the heat conductivity of the pot 30 is, and the lower the dry-burning 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, different alarm temperature thresholds and dry burning prevention temperature thresholds can be determined by comparing the boiling temperature of the pot 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, misjudgment is avoided, and the user experience is good.

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 includes a plurality of different alarm temperature thresholds, the plurality of alarm temperature thresholds and the anti-dry heating temperature threshold 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 include a first alarm temperature threshold a and a second alarm temperature threshold B, respectively, where the first alarm temperature threshold a is less than the second alarm temperature threshold B. The first alarm temperature threshold A, the second alarm temperature threshold B and the dry burning prevention temperature threshold C 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 alarm temperature threshold, 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 entering step S10;

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, and entering step S10;

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 is 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 an alarm temperature threshold value, and control the cooker 20 to send alarm information when the temperature of the cooker 30 is greater than the alarm temperature threshold value. 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 and does not judge whether the temperature of the cooker 30 is greater than the alarm temperature threshold value or control the cooker 20 not to send alarm information when the temperature of the cooker 30 is greater than the alarm temperature threshold value. 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, the corresponding alarm temperature threshold and dry-burning prevention temperature threshold are obtained according to the cooking state of the pot 30 and the thermal conductivity of the pot 30. In one embodiment, the pot 30 is in a water cooking state, when the boiling temperature of the pot is less than or equal to the preset heat conducting temperature, which indicates that the heat conducting temperature of the pot 30 is better, the dry-heating prevention temperature threshold may be set to T1-210 ℃. When the alarm temperature is one, the alarm temperature threshold may be set to T2 ═ 170 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T2, the control device 50 can control the cooker 20 to send an alarm sound every 60 seconds, the alarm sound lasts 3 seconds each time, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold, the control device 50 stops sending 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 T2 ═ 170 ℃ and T3 ═ 190 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T2 and less than or equal to T3, 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 T3 and less than or equal to T1, 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 T1, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

In another embodiment, the pot 30 is in a water cooking state, when the boiling temperature of the pot is higher than the preset heat conducting temperature, which indicates that the heat conducting temperature of the pot 30 is poor, the dry heating prevention temperature threshold may be set to T4-250 ℃. When the alarm temperature threshold is one, the alarm temperature threshold may be set to T5 ═ 220 ℃. When the temperature of the pot 30 is greater than the alarm temperature threshold T2, the control device 50 can control the cooker 20 to send an alarm sound every 60 seconds, the alarm sound lasts 3 seconds each time, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold, the control device 50 stops sending 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 ℃ T5 and 235 ℃ T6. When the temperature of the pot 30 is greater than the alarm temperature threshold T5 and less than or equal to T6, 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 T6 and less than or equal to T4, 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 T4, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

In yet another embodiment, the pot 30 is in a no water cooking state and the dry-fire prevention temperature threshold may be set to T7-290 ℃. When the alarm temperature threshold is one, the alarm temperature threshold may be set to 240 ℃ at T8. When the temperature of the pot 30 is greater than the alarm temperature threshold T2, the control device 50 can control the cooker 20 to send an alarm sound every 60 seconds, the alarm sound lasts 3 seconds each time, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold, the control device 50 stops sending 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 T8 and 260 ℃ at T9. When the temperature of the pot 30 is greater than the alarm temperature threshold T8 and less than or equal to T9, 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 T9 and less than or equal to T7, 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 T7, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

Specifically, in a specific practical application scenario, the corresponding alarm temperature threshold and the dry-heating prevention temperature threshold are obtained only according to the cooking state of the pot 30. In one embodiment, the boiling temperature of the pot 30 is Tb, and the dry-heating prevention temperature threshold may be set to T10 ═ Tb +80℃ when the pot 30 is in the water cooking state. When the alarm temperature threshold is one, the alarm temperature threshold may be set to T11 ═ T +50℃. 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 an alarm sound every 60 seconds, the alarm sound lasts 3 seconds each time, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold, the control device 50 stops sending 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 (Tb +50) ° c T11 and (Tb +65) ° c T12. 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.

In another embodiment, the dry-heating prevention temperature threshold may be set to T13-290 ℃ when the pot 30 is in the no-water cooking state. When the alarm temperature threshold is one, the alarm temperature threshold may be set to 240 ℃ at T14. When the temperature of the pot 30 is greater than the alarm temperature threshold T2, the control device 50 can control the cooker 20 to send an alarm sound every 60 seconds, the alarm sound lasts 3 seconds each time, and until the temperature of the pot 30 is greater than the dry-burning prevention temperature threshold, the control device 50 stops sending 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 T14 and 260 ℃ at T15. When the temperature of the pot 30 is greater than the alarm temperature threshold T14 and less than or equal to T15, 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 T15 and less than or equal to T13, 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 T13, the control device 50 controls the pot 20 to stop making the alarm sound when being closed.

The following embodiments specifically describe the whole control method according to the above embodiments. It should be noted that the first embodiment and the second embodiment are only specific examples of the control method of the present invention, and the control method of the embodiment of the present invention may be combined or designed into other embodiments according to actual situations, and is not limited herein.

Embodiment one (see FIG. 13)

A1, opening the cooking range 20.

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

A3, control device 50 determines the cooking state of pot 30. If the pot 30 is in the water cooking state, go to step a 4; if the pot 30 is in the no-water cooking state, go to step A8.

A4, control device 50 according to boiling temperature T of pot 30_bThe thermal conductivity of the pot 30 is determined.

A5, the control device 50 determines whether the temperature of the pot 30 detected at present exceeds the dry-heating prevention temperature threshold corresponding to the thermal conductivity of the pot 30. If yes, go to step A11; if not, go to step A6.

A6, control device 50 determines whether the temperature of pan 30 detected currently exceeds the alarm temperature threshold corresponding to the heat conductivity and alarm information of pan 30. If yes, go to step A7; if not, go to step A2.

A7, control device 50 controls buzzer to alarm information corresponding to alarm temperature threshold.

A8, 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 A11; if not, go to step A9.

A9, control device 50 determines whether the temperature of pan 30 detected currently exceeds the alarm temperature threshold corresponding to the alarm information in the no-water cooking state. If yes, go to step A10; if not, go to step A2.

A10, control device 50 controls buzzer to alarm information corresponding to alarm temperature threshold.

A11, controlling the cooking range 20 to be closed.

EXAMPLE two (see FIG. 14)

A1, opening the cooking range 20.

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

A3, control device 50 determines the cooking state of pot 30. If the pot 30 is in the water cooking state, go to step a 4; if the pot 30 is in the no-water cooking state, go to step a 7.

A4, the control device 50 determines whether the temperature of the pan 30 detected currently exceeds the dry-burning prevention temperature threshold corresponding to the alarm information when the pan 30 is in the water cooking state. If yes, go to step A10; if not, go to step A5.

A5, control device 50 determines whether the temperature of pan 30 detected currently exceeds the alarm temperature threshold corresponding to the alarm information when pan 30 is in water cooking state. If yes, go to step A6; if not, go to step A2.

A6, control device 50 controls buzzer to alarm information corresponding to alarm temperature threshold.

A7, control device 50 determines whether the temperature of pot 30 detected currently exceeds the dry-heating prevention temperature threshold corresponding to the pot 30 during the waterless cooking. If yes, go to step A10; if not, go to step A8.

A8, control device 50 determines whether the temperature of pan 30 detected currently exceeds the alarm temperature threshold corresponding to the alarm information during the waterless cooking. If yes, go to step A9; if not, go to step A2.

A9, control device 50 controls buzzer to alarm information corresponding to alarm temperature threshold.

A10, 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 kitchen range, and is characterized in that the control method for preventing dry burning comprises the following steps:

collecting the temperature of the pot;

if the temperature of the cookware is greater than the alarm temperature threshold, controlling the cooker to send alarm information corresponding to the alarm temperature threshold; the dry burning prevention temperature threshold of the stove is greater than the alarm temperature threshold;

the cooking states comprise a water cooking state and a water-free cooking state, and the control method comprises the following steps:

the first alarm temperature value is smaller than the second alarm temperature value, and the first dry heating prevention temperature value is smaller than the second dry heating prevention temperature value;

the alarm temperature threshold comprises a plurality of different alarm temperature thresholds, a plurality of alarm ranges are defined by the alarm temperature thresholds and the anti-dry heating temperature threshold, the alarm information comprises a plurality of alarm information, and each alarm range corresponds to one alarm information;

control the cooking utensils send with alarm information that alarm temperature threshold value corresponds includes:

controlling the cooker to send out the alarm information corresponding to the alarm range according to the alarm range in which the temperature of the cooker is; the frequency of the alarm information sent by the stove is positively correlated with the temperature in the alarm range;

the temperature quantity of pan gathered under the condition that is less than or equal to preset quantity, will second warning temperature value sets up to the warning temperature threshold value of cooking utensils, will the second prevents that dry combustion method temperature value sets up to the dry combustion method temperature threshold value of cooking utensils.

2. The control method of claim 1, wherein determining the cooking state of the cooktop according to the temperature of the cookware comprises:

judging whether the boiling section exists in the pot or not 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.

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

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

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 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 heat conductivity of pan acquires correspondingly warning temperature threshold with prevent dry combustion method temperature threshold.

6. The control method of claim 5, wherein obtaining the corresponding alarm temperature threshold and the dry-heating prevention temperature threshold according to the heat conductivity of the pot comprises:

7. The control method of claim 1, wherein controlling the cooker to send an alarm message corresponding to the alarm temperature threshold comprises:

8. The control method according to claim 1, characterized in that the alarm information includes a sound whose frequency is positively correlated with the temperature of the alarm range, and/or

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

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

receiving an alarm termination instruction;

11. The control method of claim 1, wherein the temperature of the pot is obtained by at least one of:

12. 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 11.