CN113124427B - Method and device for detecting dry heating of cookware and electromagnetic appliance - Google Patents
Method and device for detecting dry heating of cookware and electromagnetic appliance Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
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- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The embodiment of the invention provides a method and a device for detecting dry heating of a pot and an electromagnetic appliance, wherein the method comprises the following steps: acquiring a current conduction width PPG and a current heating power of an IGBT of an electromagnetic appliance; and detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power. When the cooker is dry-heated, the temperature is quickly increased, and the balance between the original cooker and the magnetic field is quickly destroyed in the temperature range when the cooker is not heated normally. Therefore, when the cooker is dry-burned, the heating power of the electromagnetic appliance and the value of the PPG change rapidly. Therefore, compared with the temperature detected by the temperature sensor, whether the cooker is dry-burned or not can be rapidly and accurately detected by the heating power and the PPG.
Description
Technical Field
The embodiment of the invention relates to the technical field of household appliances, in particular to a method and a device for detecting dry heating of a pot and an electromagnetic appliance.
Background
The temperature sensor of the existing induction cooker is placed under the ceramic panel, the temperature measurement will generate serious hysteresis, when the cooker is dry-burned, the bottom of the cooker rises rapidly within a few seconds, and at the moment, the temperature sensor can not detect the temperature of the cooker in time, so the induction cooker does not know that the cooker is dry-burned. Thus, the induction cooker will continue to heat. When the temperature of the bottom of the pan is continuously transmitted to the temperature sensor, the temperature sensor detects that the temperature of the bottom of the pan is too high, and the electromagnetic oven stops heating, the pan is actually dried and burned for a period of time, so that food in the pan is damaged at high temperature, and parts in the electromagnetic oven are possibly damaged at high temperature.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting dry heating of a pot and an electromagnetic appliance, so as to improve the speed and accuracy for detecting whether the pot is dry heated.
In a first aspect, an embodiment of the present invention provides a method for detecting dry heating of a pot, applied to an electromagnetic appliance, the method including:
acquiring a current conduction width PPG and a current heating power of an IGBT of an electromagnetic appliance;
and detecting whether the cookware heated by the electromagnetic appliance is dry-heated or not according to the current PPG and the current heating power.
According to the embodiment, whether the cookware heated by the electromagnetic appliance is dry-burned or not is detected by conducting the width PPG and the heating power, and whether the cookware is dry-burned or not is detected timely and accurately compared with the case that whether the cookware is dry-burned or not is detected by the temperature sensor.
Optionally, the detecting whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG and the current heating power includes:
obtaining a cache PPG and cache heating power;
and detecting whether the cookware heated by the electromagnetic appliance is dry-heated or not according to the current PPG, the cached PPG, the current heating power and the cached heating power.
According to the embodiment, when the cached PPG and the cached heating power are normal (not dry-burned) of the cooker, the PPG and the heating power of the induction cooker are compared according to the current PPG and the cached PPG, and the current heating power and the cached heating power are compared, so that the change of the PPG and the heating power caused by dry burning of the cooker is determined, whether the cooker is dry-burned or not is determined, and the detection accuracy is improved.
Optionally, the detecting whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG, the buffered PPG, the current heating power and the buffered heating power includes:
judging whether the current heating power is smaller than the cache heating power or not;
if the current heating power is smaller than or equal to the cache heating power, further judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
and if the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, determining that the cooker heated by the electromagnetic appliance is dry-heated.
Optionally, if the difference of the current PPG minus the buffered PPG is less than a first preset value, the method further includes:
judging whether the current PPG is equal to the maximum PPG of the IGBT;
If the current PPG is equal to the maximum PPG of the IGBT, judging whether the current heating power is smaller than the cache heating power or not;
and if the current heating power is smaller than the cache heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
In this embodiment, when the current PPG is equal to the maximum PPG, it is further determined whether the difference between the buffered heating power and the current heating power is greater than a second preset value, so that the accuracy of detection is further improved.
Optionally, the detecting whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG and the current heating power includes:
judging whether the current PPG is equal to the maximum PPG of the IGBT;
if the current PPG is equal to the maximum PPG of the IGBT, judging whether the current heating power is smaller than the cache heating power or not;
and if the current heating power is smaller than the cache heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, the determining whether the current heating power is smaller than the cache heating power includes:
judging whether the difference value of the cache heating power minus the current heating power is larger than a second preset value or not;
Correspondingly, the determining of the dry heating of the cookware heated by the electromagnetic appliance comprises the following steps:
and if the difference of the current heating power minus the cache heating power is larger than a second preset value, determining that the cookware heated by the electromagnetic appliance is dry-heated.
According to the embodiment, the problem of dry heating of the cooker can be avoided when the heating power is reduced by a small extent during normal heating of the induction cooker by setting the preset value of the difference between the cache heating power and the current heating power, so that the detection accuracy is improved.
Optionally, before determining whether the current heating power is less than the cache heating power, the method further includes:
obtaining a cache PPG;
if the current PPG is smaller than the maximum PPG of the IGBT, judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
the judging whether the current heating power is smaller than the cache heating power comprises the following steps:
and if the difference value of subtracting the cache PPG from the current PPG is larger than or equal to a first preset value, judging whether the current heating power is smaller than the cache heating power.
In this embodiment, when the current PPG is smaller than the maximum PPG of the IGBT, it is determined whether the difference of the current PPG minus the buffered PPG is greater than or equal to a first preset value, and when the difference of the current PPG minus the buffered PPG is greater than or equal to the first preset value, it is further determined that the difference between the heating power and the buffered power is further determined, so that the accuracy of detection is improved.
Optionally, if the current heating power is greater than the cache heating power, the method further includes:
replacing the buffered PPG with the current PPG and replacing the buffered heating power with the current heating power.
In this embodiment, when the current heating power is greater than the cache heating power, it may be stated that the pan is not dry-burned at this time, the obtained PPG and the heating power are saved, and the problem that the pan is not dry-burned due to the fact that the obtained heating power is greater than the cache heating power is avoided, but in reality, the dry-burned of the pan is improved, and the accuracy of detection is improved.
Optionally, the method further comprises:
and if the dry heating of the cookware heated by the electromagnetic appliance is determined, controlling the electromagnetic appliance to reduce the heating power, or intermittently heating or stopping heating.
In the embodiment, when the dry heating of the cooker is determined, the electromagnetic appliance is controlled to reduce the heating power, or intermittently heat or stop heating, so that the safety accident is avoided, and the safety of the electromagnetic appliance is improved.
In a second aspect, an embodiment of the present invention provides a device for detecting dry heating of a pot, applied to an electromagnetic appliance, the device including:
the acquisition module is used for acquiring the current PPG and the current heating power of the IGBT of the electromagnetic appliance;
And the processing module is used for detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power.
Optionally, the obtaining module is configured to obtain a cache PPG and a cache heating power;
the processing module detects whether the pot heated by the electromagnetic appliance is dry-heated or not according to the current PPG and the current heating power, and is specifically configured to: and detecting whether the cookware heated by the electromagnetic appliance is dry-heated or not according to the current PPG, the cached PPG, the current heating power and the cached heating power.
Optionally, the processing module detects whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG, the cached PPG, the current heating power and the cached heating power, and is specifically configured to:
judging whether the current heating power is smaller than the cache heating power or not;
if the current heating power is smaller than or equal to the cache heating power, further judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
and if the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, determining that the cooker heated by the electromagnetic appliance is dry-heated.
Optionally, if the processing module determines that the difference of the current PPG minus the buffered PPG is less than or equal to a first preset value, the processing module is further configured to:
judging whether the current PPG is equal to the maximum PPG of the IGBT;
if the current PPG is equal to the maximum PPG of the IGBT, judging whether the current heating power is smaller than the cache heating power or not;
and if the current heating power is smaller than the cache heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, the processing module detects whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG and the current heating power, and is specifically configured to:
judging whether the current PPG is equal to the maximum PPG of the IGBT;
if the current PPG is equal to the maximum PPG of the IGBT, judging whether the current heating power is smaller than the cache heating power or not;
and if the current heating power is smaller than the cache heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, when the processing module determines whether the current heating power is smaller than the cache heating power, the processing module is specifically configured to:
judging whether the difference value of the cache heating power minus the current heating power is larger than a second preset value or not;
Correspondingly, when the processing module determines that the cookware heated by the electromagnetic appliance is dry-burned, the processing module is specifically used for:
and if the difference of the current heating power minus the cache heating power is larger than a second preset value, determining that the cookware heated by the electromagnetic appliance is dry-heated.
Optionally, the acquiring module is configured to acquire a buffered PPG;
before the processing module determines whether the current heating power is less than the cache heating power, the processing module is further configured to:
if the current PPG is smaller than the maximum PPG of the IGBT, judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
the judging whether the current heating power is smaller than the cache heating power comprises the following steps:
and if the difference value of subtracting the cache PPG from the current PPG is larger than or equal to a first preset value, judging whether the current heating power is smaller than the cache heating power.
Optionally, if the processing module determines that the current heating power is greater than the cache heating power, the detection module is further configured to:
replacing the buffered PPG with the current PPG and replacing the buffered heating power with the current heating power.
Optionally, the processing module is further configured to control the electromagnetic appliance to reduce heating power, or intermittently heat, or stop heating if the processing module determines that the pot heated by the electromagnetic appliance is dry-burned.
In a third aspect, embodiments of the present invention provide an electromagnetic appliance comprising: at least one processor and memory;
the memory stores computer-executable instructions; the at least one processor executes computer-executable instructions stored in the memory to perform the method according to any one of the first aspect of the embodiments of the present invention.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium having stored therein program instructions which, when executed by a processor, implement the method of any of the first aspects of the embodiments of the present invention.
In a fifth aspect, embodiments of the present application provide a program product comprising a computer program stored in a readable storage medium, from which at least one processor of an electromagnetic appliance can read, the at least one processor executing the computer program causing the electromagnetic appliance to implement the method according to any one of the first aspect of the embodiments of the present application.
The embodiment of the invention provides a pot dry-heating detection method, a pot dry-heating detection device and an electromagnetic appliance, wherein the current PPG and the current heating power of an IGBT of the electromagnetic appliance are obtained; and detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power. When the cooker is dry-heated, the temperature is quickly increased, and the balance between the original cooker and the magnetic field is quickly destroyed in the temperature range when the cooker is not heated normally. Therefore, when the cooker is dry-burned, the heating power of the electromagnetic appliance and the value of the PPG change rapidly. Therefore, compared with the temperature detected by the temperature sensor, whether the cooker is dry-burned or not can be timely and accurately detected by the heating power and the PPG, and the safety of the electromagnetic appliance is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a diagram of an application scenario provided in an embodiment of the present invention
FIG. 2 is a flowchart of a method for detecting dry heating of a pot according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention;
FIG. 4 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention;
FIG. 5 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention;
FIG. 6 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a device for detecting dry heating of a pan according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electromagnetic apparatus according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a diagram of an application scenario provided in an embodiment of the present invention, as shown in fig. 1, when a cooker is heated on an electromagnetic appliance, for example, an induction cooker, dry heating of the cooker may occur, for example, a user forgets that the induction cooker is heating the cooker and does not detect the cooker on the induction cooker for a long time, or the user forgets to add water to the cooker to place the cooker on the induction cooker for heating.
In the prior art, the temperature of the cooker is detected by the temperature sensor to judge whether the cooker is dry-burned, but because the temperature detected by the temperature sensor has hysteresis, when the temperature detected by the temperature sensor determines that the cooker is dry-burned, the cooker is actually dry-burned for a period of time, so that food in the cooker is damaged, and the induction cooker is damaged due to high temperature.
Wherein, the principle of electromagnetic appliance heating is: the coil inside the electromagnetic appliance generates a magnetic field, and when the magnetic force lines emitted by the magnetic field contact the metal pot, the magnetic field reacts with the metal. Namely, when the cooker and the magnetic force lines interact, the magnetic force lines can cut molecules in the metal, so that the metal can generate irregular and intense movement. At this time, metal molecules collide with each other to gradually generate heat, and the temperature of the cooker is rapidly increased, so that cooking can be realized. The magnetic field generated by the coil is generated by the on and off of an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), and the on duration of the IGBT is determined by the on width (PPG) of the IGBT output by a control module of the electromagnetic appliance. Therefore, the heating power of the electromagnetic appliance is related to the size of the PPG. Therefore, the invention detects whether the cookware on the electromagnetic oven is dry-burned or not according to the heating power of the electromagnetic appliance and the PPG, and the following method embodiments are detailed.
In addition, when the pot is dry-burned, the temperature of the pot is rapidly increased, the heating power of the electromagnetic appliance is directly reduced, and after the heating power is reduced, the PPG is directly increased. Therefore, according to the heating power and the PPG, whether the electromagnetic appliance is dry-burned or not can be timely detected.
Fig. 2 is a flowchart of a method for detecting dry heating of a pot according to an embodiment of the present invention, where the method for detecting dry heating of a pot is applied to an electromagnetic appliance, as shown in fig. 2, the method of the present embodiment may include:
s101, acquiring a current conduction width PPG and a current heating power of an IGBT of the electromagnetic appliance.
In this embodiment, an electromagnetic appliance will be described by taking an induction cooker as an example. The electromagnetic oven is provided with a constant power control program, and when the electromagnetic oven normally heats the cooker, the electromagnetic oven controls the heating power through the constant power control program to perform constant heating with the set heating power. That is, when the heating power is greater than the set heating power, the constant power control routine decreases the PPG output; when the heating power is less than the set heating power, the constant power control routine increases the PPG output. When the cookware on the induction cooker is dry-burned, the heating power of the induction cooker is reduced, so that the constant power control program increases the PPG output; or when the induction cooker is heated normally with low power, and the PPG reaches the maximum PPG of the IGBT, if the pot is burned dry, the heating power is kept unchanged by increasing the PPG, so that the heating power is reduced. Therefore, the induction cooker can detect whether the cooker heated on the induction cooker is dry-burned or not according to the current heating power and the current PPG.
The induction cooker may periodically detect whether the torch is dry-burned, for example, obtain the current PPG and the current heating power every 2 s. Or, because of different cooking functions, the requirements for detecting the dry heating of the cookware are different, and the detection period is set according to the current cooking function of the induction cooker, for example, when the induction cooker is used for cooking, the detection period can be 1s due to less moisture in the cookware, and the detection period can be 4s when the cookware is used for cooking soup or boiling water. Specific data may be set according to actual conditions, which is not limited in this application.
S102, detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power.
In this embodiment, optionally, after the current PPG and the current heating power are obtained, the buffered PPG and the buffered heating power are obtained. And when the obtained heating power is larger than the cache power, replacing the cache heating power with the current heating power and replacing the cache PPG with the current PPG. Therefore, when the electromagnetic oven is just started and the heating power is in the rising stage, the heating power and the PPG can be prevented from being stored, and at the moment, the heating power and the PPG do not reach stable values yet. When the pot is dry-burned, the heating power is reduced from a stable value, and the PPG is increased, so that the current heating power is used for generating the buffer memory heating power, and the current PPG is larger than the buffer memory PPG. Therefore, when the current heating power is larger than the buffer power, the buffer heating power is replaced by the current heating power, and the buffer PPG is replaced by the current PPG, so that the accuracy of draft detection can be improved. Or if the pot is not dry-burned currently, replacing the cache heating power with the current heating power and replacing the cache PPG with the current PPG.
And then comparing the current PPG with the cached PPG, and comparing the current heating power with the cached heating power to acquire the variation trend of the current PPG and the current heating power, thereby detecting whether the cooker is dry-burned.
When the dry heating of the cookware heated by the induction cooker is detected, the induction cooker is controlled to stop heating, or intermittently heating is controlled, or heating power is reduced, for example, heating is performed with minimum heating power, so that food materials in the cookware are prevented from being damaged due to continuous heating of the induction cooker, and after high temperature generated by dry heating of the cookware is transmitted to the induction cooker, the induction cooker fails.
In the embodiment, the current conduction width PPG and the current heating power of the IGBT of the electromagnetic appliance are obtained; and detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power. When the cooker is dry-heated, the temperature is quickly increased, and the balance between the original cooker and the magnetic field is quickly destroyed in the temperature range when the cooker is not heated normally. Therefore, when the cooker is dry-burned, the heating power of the electromagnetic appliance and the value of the PPG change rapidly. Therefore, compared with the temperature detected by the temperature sensor, whether the cooker is dry-burned or not can be rapidly and accurately detected by the heating power and the PPG, and the safety of the electromagnetic appliance is improved.
The technical solution of the method embodiment shown in fig. 1 will be described in detail below using several specific embodiments.
Fig. 3 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention, as shown in fig. 3, the method of this embodiment may include:
s201, judging whether the current heating power is smaller than or equal to the cache heating power, if yes, executing S202; if not, executing S204;
in this embodiment, the heating power is reduced due to dry heating of the cooker, and a constant power control program is set in the induction cooker, so that when the heating power starts to be reduced, the heating power can be kept unchanged by increasing the PPG through the constant power control program. However, if the heating power is continuously reduced, the heating power cannot be maintained constant by increasing the PPG. Therefore, if the current heating power and the current PPG are obtained during the dry heating of the pot, the current heating power is smaller than or equal to the heating power.
However, when the pan is not dry-burned, the heating power of the induction cooker is also kept unchanged, so if the current heating power is less than or equal to the cache heating power, the pan is likely to be dry-burned, and the step S202 is needed to be executed to further determine whether the pan is dry-burned; if the current heating power is larger than the cache heating power, the cookware is not dry-heated.
S202, judging whether the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, if so, executing S203; if not, executing S204;
in this embodiment, when the pan is dry-burned, the constant power control program increases the PPG to maintain the heating power as constant as possible. Therefore, if the pot burns dry, the PPG increases. And judging whether the difference value of the current PPG minus the cached PPG is larger than or equal to a first preset value. For example, different first preset values can be set according to different cookers due to the differences of the cookers, such as materials, sizes and the like. If the difference between the current PPG and the buffered PPG is greater than the first preset value, the dry heating of the pot is indicated, otherwise, the pot may be considered as not being dry heated, or the detection may be continued, as shown in the embodiment of fig. 5.
S203, determining the dry heating of the cookware heated by the electromagnetic appliance.
In this embodiment, if the current heating power is less than or equal to the buffered heating power and the difference of the current PPG minus the buffered PPG is greater than or equal to the first preset value, the dry heating of the pan is illustrated.
S204, determining that the cookware heated by the electromagnetic appliance is not dry-burned.
In this embodiment, a scheme is provided for detecting whether the pot is dry-burned according to the heating power and the PPG, that is, comparing the current heating power with the cache heating power, if the current heating power is less than or equal to the cache heating power, comparing the current PPG with the cache PPG, and if the difference of subtracting the cache PPG from the current PPG is greater than or equal to a first preset value, determining that the pot is dry-burned. Therefore, when the cookware is dry-burned, the dry-burned cookware is determined in time through the heating power and the PPG, and whether the cookware is dry-burned or not is detected through the heating power and the PPG, so that the accuracy of a detection result can be improved.
Fig. 4 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention, as shown in fig. 4, the method of this embodiment may include:
s301, judging whether the current PPG is equal to the maximum PPG of the IGBT, if so, executing S302; if not, executing S304;
in this embodiment, since the IGBT has a limitation of the on-time, the PPG of the IGBT needs to be controlled in the induction cooker by the control module, and therefore, the PPG in the induction cooker cannot be infinitely increased. And the pan is dry-burned, and because the heating power is reduced, PPG needs to be added to maintain the heating power unchanged. Thus, the current PPG obtained is at most equal to the maximum PPG of the IGBT. Therefore, it is determined whether the current PPG is equal to the maximum PPG of the IGBT, if the current PPG is equal to the maximum PPG of the IGBT, the pan has a possibility of dry heating, and S302 needs to be executed to further detect whether the pan is dry-heated; if the current PPG is smaller than the maximum PPG of the IGBT, the pot can be considered to be not dry-burned or the detection is continued, as shown in the embodiment shown in FIG. 6.
S302, judging whether the current heating power is smaller than the cache heating power, if yes, executing S303; if not, executing S304;
in this embodiment, when the pan is not dry-burned, if the PPG of the induction cooker reaches the maximum PPG, the heating power is reduced and the PPG is not increased when the pan is dry-burned. Therefore, when the current PPG is equal to the maximum PPG, judging whether the current heating power is smaller than the cache heating power, and if the current heating power is smaller than the cache heating power, indicating that the cooker is dry-heated.
In some embodiments, when the induction cooker is in the process of heating the cooker, the current heating power of the induction cooker may be reduced by a small extent under the condition that the cooker is not dry-burned, so that the current heating power is smaller than the cache heating power. Therefore, one implementation of S302 may be to determine whether the difference between the buffer heating power and the current heating power is greater than a second preset value, if so, determine that the pan is dry-burned, otherwise, determine that the pan is not dry-burned. For example, when the difference of the buffer heating power minus the current heating power is greater than 100w, it is indicated that the heating power of the induction cooker is still reduced when the PPG reaches the maximum PPG, so as to determine the dry heating of the cooker. For different cooking functions, the second preset value may be different due to different base numbers of the heating functions, for example, the second preset value may be 30w when the induction cooker performs the milk heating function, and the second preset value may be 100w when the induction cooker performs the quick-frying function.
S303, determining the dry heating of the cookware heated by the electromagnetic appliance.
In this embodiment, when the current PPG is equal to the maximum PPG and the current heating power is smaller than the cache heating power, the dry heating of the pot is determined.
S304, determining that the cookware heated by the electromagnetic appliance is not dry-burned.
In this embodiment, a scheme is presented in which whether the pot is dry-burned is detected according to the heating power and the PPG, that is, the current PPG is compared with the maximum PPG first, if the current PPG is equal to the maximum PPG, the current heating power is compared with the cache heating power, and if the current heating power is smaller than the cache heating power, the pot is determined to be dry-burned. Therefore, when the cookware is dry-burned, the dry-burned cookware is determined in time through the heating power and the PPG, and whether the cookware is dry-burned or not is detected through the heating power and the PPG, so that the accuracy of a detection result can be improved.
Fig. 5 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention, as shown in fig. 5, the method of this embodiment may include:
s401, judging whether the current heating power is smaller than or equal to the cache heating power, if yes, executing S402; if not, executing S406;
in this embodiment, the specific implementation of S401 may refer to S301, which is not described herein.
S402, judging whether the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, if so, executing S405; if not, executing S403;
in this embodiment, when the pan is dry-burned, the heating power is reduced and the PPG is increased, so when the difference obtained by subtracting the cache PPG from the current PPG is larger than the first preset value, the dry-burned pan is determined. However, since the PPG cannot be increased infinitely, if the PPG is increased to the maximum PPG when the pot is dry-burned, or if the PPG is already the maximum PPG when the pot is dry-burned, the PPG will not be increased even if the heating power is continuously decreased. It may result in the difference of the current PPG minus the buffered PPG being less than or equal to the first preset value. Therefore, if the difference of the current PPG minus the buffered PPG is less than or equal to the first preset value, it is necessary to determine whether the current PPG reaches the maximum PPG.
S403, judging whether the current PPG is equal to the maximum PPG of the IGBT, if so, executing S404 or S405; if not, executing S406;
in this embodiment, if the current PPG is equal to the maximum PPG, the dry heating of the pot may be directly determined. Or executing S404, further determining whether the difference between the cache heating power and the current heating power is greater than a second preset value, thereby further improving the accuracy of detection. If the current PPG is smaller than the maximum PPG, determining that the cooker is not dry-burned.
S404, judging whether the difference value of the current heating power minus the cache heating power is larger than a second preset value, if so, executing S405; if not, executing S406;
in this embodiment, when the difference between the cache heating power and the current heating power is greater than a second preset value, it is determined that the pan is dry-burned, otherwise, it is determined that the pan is not dry-burned.
S405, determining the dry heating of the cookware heated by the electromagnetic appliance.
S406, determining that the cookware heated by the electromagnetic appliance is not dry-burned.
In this embodiment, when detecting whether the pot is dry-burned according to the heating power and the PPG, the current PPG is compared with the buffered PPG and the current PPG is compared with the maximum PPG by comparing the heating power with the buffered power. Not only can the dry heating of the pot be timely detected, but also the detection accuracy is further improved.
Fig. 6 is a flowchart of a method for detecting dry heating of a pot according to another embodiment of the present invention, as shown in fig. 6, the method of this embodiment may include:
s501, judging whether the current PPG is equal to the maximum PPG of the IGBT, if so, executing S502; if not, executing S503;
in this embodiment, the current PPG is compared with the maximum PPG first, and if the current PPG is equal to the maximum PPG, if the heating power is reduced, the dry heating of the pot can be determined. Thus, the current heating power is compared with the cache heating power.
If the current PPG is less than the maximum PPG, there may be a pot dry heat, but the PPG has not yet increased to the maximum PPG. Therefore, judging whether the difference value of the current PPG minus the cache PPG is larger than a first preset value, and comparing the current heating power with the cache heating power if the difference value of the current PPG minus the cache PPG is larger than the first preset value; and if the difference value of the current PPG minus the cached PPG is smaller than or equal to a first preset value, determining that the cooker is dry-heated.
S502, judging whether the current heating power is smaller than the cache heating power, if so, executing S504; if not, executing S505;
in this embodiment, if the current PPG is equal to the maximum PPG and the current heating power is less than or equal to the cache heating power, or the current PPG is less than the maximum PPG and the difference of the current PPG minus the cache PPG is greater than a first preset value and the current heating power is less than or equal to the cache heating power, the dry heating of the pot is determined. If the current PPG is equal to the maximum PPG, the current heating power is larger than the cache heating power, or the current PPG is smaller than the maximum PPG, the difference of the current PPG minus the cache PPG is larger than a first preset value, and the current heating power is larger than the cache heating power, the pot is determined to not be dry-heated.
S503, judging whether the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, if so, executing S502; if not, executing S505;
in this embodiment, on the basis that the current PPG is smaller than the maximum PPG, if the difference of the current PPG minus the buffered PPG is smaller than or equal to a first preset value, it is determined that the pan is not dry-burned; if the difference of the current PPG minus the buffered PPG is greater than a first preset value, the pan may burn dry, and therefore, it needs to be determined whether the heating power is reduced. In addition, when the pot is dry-burned, the heating power should be reduced, but because of the constant power control program in the induction cooker, the PPG can be increased, so even if the heating power is not reduced, when the difference of the current PPG minus the cache PPG is larger than a first preset value and the current PPG is smaller than the maximum PPG, the pot is still dry-burned. Therefore, when the difference of subtracting the buffered PPG from the current PPG is greater than the first preset value and determining whether the heating power is reduced, it is necessary to determine whether the heating power is equal to the buffered power. In this case, if the heating power is equal to the cache power,
the dry heating of the cooker can be determined.
S504, determining the dry heating of the cookware heated by the electromagnetic appliance.
S505, determining that the cookware heated by the electromagnetic appliance is not dry-burned.
In this embodiment, when detecting whether the pot is dry-burned according to the heating power and the PPG, the current PPG is compared with the maximum PPG, the heating power is compared with the cache power, and the difference of subtracting the cache PPG from the current PPG is determined. Not only can the dry heating of the cooker be timely detected, but also the detection accuracy can be further improved.
Fig. 7 is a schematic structural diagram of a device for detecting dry heating of a pot according to an embodiment of the present invention, where the device for detecting dry heating of a pot according to the embodiment of the present invention is applied to an electromagnetic appliance, as shown in fig. 7, the device of the present embodiment may include: an acquisition module 61 and a processing module 62. Wherein, the liquid crystal display device comprises a liquid crystal display device,
an acquisition module 61 for acquiring a current PPG and a current heating power of an IGBT of the electromagnetic appliance;
the processing module 62 is configured to detect whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG and the current heating power.
Optionally, an obtaining module 61 is configured to obtain a buffered PPG and a buffered heating power;
the processing module 62 detects whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG and the current heating power, and is specifically configured to: and detecting whether the cookware heated by the electromagnetic appliance is dry-heated or not according to the current PPG and the cached PPG, and the current heating power and the cached heating power.
Optionally, the processing module 62 detects whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG, the buffered PPG, the current heating power and the buffered heating power, and is specifically configured to:
judging whether the current heating power is smaller than the cache heating power or not;
if the current heating power is smaller than or equal to the cache heating power, further judging whether the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value;
and if the difference value of the current PPG minus the cached PPG is larger than or equal to a first preset value, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, if the processing module 62 determines that the difference of the current PPG minus the buffered PPG is less than or equal to the first preset value, the processing module 62 is further configured to:
judging whether the current PPG is equal to the maximum PPG of the IGBT;
if the current PPG is equal to the maximum PPG of the IGBT, judging whether the current heating power is smaller than the cache heating power or not;
and if the current heating power is smaller than the buffer heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, the processing module 62 detects whether the pot heated by the electromagnetic appliance is dry-burned according to the current PPG and the current heating power, and is specifically configured to:
judging whether the current PPG is equal to the maximum PPG of the IGBT;
If the current PPG is equal to the maximum PPG of the IGBT, judging whether the current heating power is smaller than the cache heating power or not;
and if the current heating power is smaller than the buffer heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, when the processing module 62 determines whether the current heating power is less than the cache heating power, the processing module is specifically configured to:
judging whether the difference value of the buffer heating power minus the current heating power is larger than a second preset value or not;
accordingly, the processing module 62 is specifically configured to, when the pan heated by the electromagnetic appliance is dry-burned:
and if the difference of the current heating power minus the buffer heating power is larger than a second preset value, determining that the cookware heated by the electromagnetic appliance is dry-burned.
Optionally, an acquiring module 61 is configured to acquire a buffered PPG;
before the processing module 62 determines whether the current heating power is less than the cache heating power, the processing module is further configured to:
if the current PPG is smaller than the maximum PPG of the IGBT, judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
judging whether the current heating power is smaller than the cache heating power or not, comprising:
if the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, judging whether the current heating power is smaller than the cache heating power.
Optionally, if the processing module 62 determines that the current heating power is greater than the cache heating power, the detection module is further configured to:
replacing the buffered PPG with the current PPG and replacing the buffered heating power with the current heating power.
Optionally, the processing module 62 is further configured to control the electromagnetic appliance to reduce the heating power, or intermittently heat, or stop heating if the processing module 62 determines that the pot heated by the electromagnetic appliance is dry-burned.
The device of the present embodiment may be used to implement the technical solutions of the above-described embodiments of the illustrated methods, and its implementation principle and technical effects are similar, and are not described herein again.
Fig. 8 is a schematic structural diagram of an electromagnetic apparatus according to an embodiment of the present invention, as shown in fig. 8, the electromagnetic apparatus according to the present embodiment may include: at least one processor 71 and a memory 72. Fig. 8 shows an electromagnetic appliance, for example a processor, wherein,
a memory 72 for storing programs. In particular, the program may include program code including computer-operating instructions. The memory 72 may include high-speed random access memory (random access memory, RAM) and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 71 is configured to execute the computer-executed instructions stored in the memory 72, so as to implement the method for detecting dry heating of a pot according to any one of the embodiments.
The processor 71 may be a central processing unit (Central Processing Unit, CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present application.
Alternatively, in a specific implementation, if the memory 72 and the processor 71 are implemented independently, the memory 72 and the processor 71 may be connected to each other and perform communication with each other through a bus. The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc., but do not represent only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 72 and the processor 71 are integrated on a single chip, the memory 72 and the processor 71 may perform the same communication through an internal interface.
The electromagnetic apparatus described in this embodiment may be used to implement the technical solutions in the embodiments of the methods described above, and its implementation principle and technical effects are similar, and are not described here again.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: read-Only Memory (ROM), random access Memory (random access Memory, RAM), magnetic or optical disk, and the like, which can store program codes.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (12)
1. A method for detecting dry heating of a pot, which is characterized by being applied to an electromagnetic appliance, the method comprising:
acquiring a current conduction width PPG and a current heating power of an IGBT of an electromagnetic appliance;
detecting whether the cookware heated by the electromagnetic appliance is dry-heated or not according to the current conduction width PPG and the current heating power;
according to the current conduction width PPG and the current heating power, detecting whether the pot heated by the electromagnetic appliance is dry-burned or not, including:
obtaining a cache PPG and cache heating power, wherein the cache PPG and the cache heating power are the PPG and the heating power of an electromagnetic appliance when the pot is not dry-burned normally;
judging whether the current heating power is smaller than or equal to the cache heating power;
if the current heating power is smaller than or equal to the cache heating power, further judging whether the difference of the current conducting width PPG minus the cache PPG is larger than or equal to a first preset value;
and if the difference of the current conduction width PPG minus the buffer PPG is larger than or equal to a first preset value, determining that the cookware heated by the electromagnetic appliance is dry-burned.
2. The method according to claim 1, wherein the method further comprises:
If the difference value of the current PPG minus the cache PPG is smaller than a first preset value, judging whether the current PPG is equal to the maximum PPG of the IGBT or not;
if the current PPG is equal to the maximum PPG of the IGBT, judging whether the difference of the cache heating power minus the current heating power is larger than a second preset value or not;
and if the difference of the current heating power minus the cache heating power is larger than a second preset value, determining that the cookware heated by the electromagnetic appliance is dry-heated.
3. The method according to claim 1, wherein the method further comprises:
and if the dry heating of the cookware heated by the electromagnetic appliance is determined, controlling the electromagnetic appliance to reduce the heating power, or intermittently heating or stopping heating.
4. A method for detecting dry heating of a pot, which is characterized by being applied to an electromagnetic appliance, the method comprising:
acquiring a current conduction width PPG and a current heating power of an IGBT of an electromagnetic appliance;
judging whether the current conduction width PPG is equal to the maximum PPG of the IGBT or not;
if the current conduction width PPG is equal to the maximum PPG of the IGBT, obtaining cache heating power and judging whether the current heating power is smaller than the cache heating power, wherein the cache heating power is the heating power of the electromagnetic appliance when the cooker is not dry-burned normally;
And if the current heating power is smaller than the cache heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
5. The method of claim 4, wherein the determining whether the current heating power is less than the cache heating power comprises:
judging whether the difference value of the cache heating power minus the current heating power is larger than a second preset value or not;
correspondingly, the determining of the dry heating of the cookware heated by the electromagnetic appliance comprises the following steps:
and if the difference of the current heating power minus the cache heating power is larger than a second preset value, determining that the cookware heated by the electromagnetic appliance is dry-heated.
6. The method of claim 4, wherein the determining whether the current heating power is less than a cache heating power further comprises:
obtaining a cache PPG, wherein the cache PPG is the PPG of the electromagnetic appliance when the pot is not dry-burned normally;
if the current PPG is smaller than the maximum PPG of the IGBT, judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
the judging whether the current heating power is smaller than the cache heating power comprises the following steps:
And if the difference value of subtracting the cache PPG from the current PPG is larger than or equal to a first preset value, judging whether the current heating power is smaller than the cache heating power.
7. The method of claim 6, wherein if the current heating power is greater than the cache heating power, further comprising:
replacing the buffered PPG with the current PPG and replacing the buffered heating power with the current heating power.
8. The method according to claim 4, wherein the method further comprises:
and if the dry heating of the cookware heated by the electromagnetic appliance is determined, controlling the electromagnetic appliance to reduce the heating power, or intermittently heating or stopping heating.
9. A pan dry-fire detection device, characterized in that it is applied to electromagnetic appliances, said device comprising:
the acquisition module is used for acquiring the current PPG and the current heating power of the IGBT of the electromagnetic appliance;
the processing module is used for detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power;
the acquisition module is further used for acquiring a cache PPG and cache heating power, wherein the cache PPG and the cache heating power are the PPG and the heating power of the electromagnetic appliance when the cooker is not dry-burned normally;
The processing module is used for detecting whether the cookware heated by the electromagnetic appliance is dry-burned or not according to the current PPG and the current heating power, and is specifically used for: judging whether the current heating power is smaller than or equal to the cache heating power;
if the current heating power is smaller than or equal to the cache heating power, further judging whether the difference of the current PPG minus the cache PPG is larger than or equal to a first preset value;
and if the difference value of the current PPG minus the cache PPG is larger than or equal to a first preset value, determining that the cooker heated by the electromagnetic appliance is dry-heated.
10. A pan dry-fire detection device, characterized in that it is applied to electromagnetic appliances, said device comprising:
the acquisition module is used for acquiring the current PPG and the current heating power of the IGBT of the electromagnetic appliance;
the processing module is used for judging whether the current PPG is equal to the maximum PPG of the IGBT; if the current PPG is equal to the maximum PPG of the IGBT, obtaining a cache heating power and judging whether the current heating power is smaller than the cache heating power, wherein the cache heating power is the heating power of the electromagnetic appliance when the cooker is not dry-burned normally; and if the current heating power is smaller than the cache heating power, determining that the cookware heated by the electromagnetic appliance is dry-burned.
11. An electromagnetic appliance, comprising: a memory for storing program instructions and at least one processor for invoking the program instructions in the memory to perform the method of pan dry heat detection as claimed in any one of claims 1 to 3 or any one of claims 4 to 8.
12. A readable storage medium having a computer program stored thereon; the computer program, when executed, implements the pot dry heat detection method as claimed in any one of claims 1-3 or any one of claims 4-8.
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| JP2002075616A (en) * | 2000-09-04 | 2002-03-15 | Fuji Electric Co Ltd | Control device of power supply for electromagnetic cooker |
| TWI362153B (en) * | 2008-01-07 | 2012-04-11 | Elan Microelectronics Corp | Control circuit for induction heating cooker and induction heating cooker thereof |
| CN106979541A (en) * | 2017-05-12 | 2017-07-25 | 深圳国创名厨商用设备制造有限公司 | The control method of electromagnetic heater and anti-dry |
| CN109429399B (en) * | 2017-09-05 | 2020-12-22 | 佛山市顺德区美的电热电器制造有限公司 | Control method and device for preventing dry burning of cookware and induction cooker |
| CN108307553B (en) * | 2017-12-28 | 2021-04-20 | 浙江绍兴苏泊尔生活电器有限公司 | Heating control method and device, electric heating assembly and electric heating appliance |
| CN110319464B (en) * | 2018-03-28 | 2021-09-03 | 佛山市顺德区美的电热电器制造有限公司 | System, method and device for preventing overheating of pot temperature |
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