CN109431233B - Cooking appliance and heat preservation control method and determination method thereof - Google Patents
Cooking appliance and heat preservation control method and determination method thereof Download PDFInfo
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- CN109431233B CN109431233B CN201811160653.0A CN201811160653A CN109431233B CN 109431233 B CN109431233 B CN 109431233B CN 201811160653 A CN201811160653 A CN 201811160653A CN 109431233 B CN109431233 B CN 109431233B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/0802—Control mechanisms for pressure-cookers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/086—Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
Abstract
The invention discloses a cooking appliance and a heat preservation control method and a determination method thereof, wherein the heat preservation control method comprises the following steps: when the cooking appliance enters a heat preservation mode, the controller acquires the internal temperature T of the cooking appliance and judges whether the internal temperature T is less than or equal to a first preset temperature T1, if so, the cooking appliance is controlled to enter a heating stage, otherwise, the upper heating device is controlled to be in a closed state, until the internal temperature T is less than or equal to the first preset temperature T1, the cooking appliance is controlled to enter the heating stage, and in the heating stage, the controller controls the upper heating device to heat according to a preset mode. The heat preservation control method of the invention can prevent the condensate water from obviously gathering and flowing down in a strand in the heat preservation process by controlling the heating mode of the upper heating device, and compared with the existing mode, the method obviously reduces the highest temperature and the balance temperature of the controller, improves the surface form of the rice and avoids the condition of white drip and dry and hard on the surface.
Description
Technical Field
The invention relates to the technical field of kitchen appliances, in particular to a cooking appliance and a heat preservation control method and a heat preservation determination method thereof.
Background
When a user uses the electric cooker, long-time heat preservation is sometimes needed, one is to directly preserve heat after the user uses the electric cooker to cook rice or congee, the other is to preserve heat under a non-hot pot state, and in the process of long-time heat preservation, a large amount of condensed water can be formed on the upper cover of the electric cooker, so that the condensed water drips on rice to cause the condition of 'dripping white' (locally rotten rice); on the other hand, the condensed water can be converged into a strand to flow to the support ring when the cover is opened, so that the user experience is reduced.
Therefore, the electric rice cooker sold in the market generally adopts a top heating wire for heating and drying the condensed water on the cover plate. However, a contradiction is generated in the process, the drying effect of the condensed water is better, the higher the temperature of the controller is, and the shorter the service life is. In addition, the existing electric rice cooker carries out the same control in the heat preservation stage, and does not carry out adaptive adjustment on heat preservation under different conditions.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a cooking appliance, a heat preservation control method and a determination method thereof, so as to solve the problem that the heat preservation under different conditions is not adaptively adjusted in the long-time heat preservation process.
In order to achieve the above purpose, on one hand, the invention adopts the following technical scheme:
a temperature keeping control method of a cooking appliance including a controller and an upper heating device, the temperature keeping control method comprising:
when the cooking appliance enters a heat preservation mode, the controller acquires the internal temperature T of the cooking appliance and judges whether the internal temperature T is less than or equal to a first preset temperature T1, if so, the cooking appliance is controlled to enter a heating stage, otherwise, the upper heating device is controlled to be in a closed state, and when the internal temperature T is less than or equal to a first preset temperature T1, the cooking appliance is controlled to enter the heating stage,
wherein, in the heating stage, the controller controls the upper heating device to heat in a predetermined manner.
Preferably, T1 is between 85 ℃ and 110 ℃.
Preferably, the predetermined manner includes:
the controller controls the upper heating device to intermittently heat.
Preferably, the method of controlling the intermittent heating of the upper heating means includes:
controlling the upper heating device to be in an off state when the internal temperature T is greater than a third predetermined temperature T3, and controlling the upper heating device to be on until the internal temperature T is less than or equal to a second predetermined temperature T2.
Preferably, T2 is more than or equal to 80 ℃ and less than or equal to 110 ℃; and/or the presence of a gas in the gas,
80℃≤T3≤110℃。
preferably, in the heating phase, a power supply voltage of the cooking appliance or an actual voltage of an electric device of the cooking appliance is detected, and the heating power of the upper heating device is adjusted according to the actual voltage.
On the other hand, the invention adopts the following technical scheme:
a determination method for determining a first predetermined temperature T1 in the soak control method as described above, the first predetermined temperature T1 being in the range of [ T4, T5], T4 being a fourth predetermined temperature, T5 being a fifth predetermined temperature,
the determination method comprises the following steps:
determining the fourth predetermined temperature T4 based on at least a temperature change of the internal temperature T in a natural cooling state and a temperature change of a place where condensed water adheres on an appliance cover of the cooking appliance; and/or the presence of a gas in the gas,
the fifth predetermined temperature T5 is determined at least based on a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of the controller.
Preferably, the method of determining the fourth predetermined temperature T4 based on at least a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of a place where condensed water adheres on an appliance cover of the cooking appliance includes:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state;
acquiring a second temperature change curve of a condensed water attachment position on an appliance cover of the cooking appliance in a natural cooling state;
in the temperature descending section of the second temperature change curve, a point with the first temperature lower than the preset condensation temperature is obtained as an agglomeration characteristic point, a temperature value T4' corresponding to the time point T1 corresponding to the agglomeration characteristic point in the first temperature change curve is obtained,
taking temperature value T4 'as the fourth predetermined temperature T4, or, taking fourth predetermined temperature T4 as T4' + Δ T1, Δ T1 is the first temperature correction coefficient.
Preferably, the insulation control method is the insulation control method according to claim 4, and the method of determining the first temperature correction coefficient Δ T1 includes:
determining a first time correction factor at 1;
and acquiring the temperature change amount from the time point T1- Δ T1 to the time point T1 in the second temperature change curve, and taking the temperature change amount as the first temperature correction coefficient Δ T1.
Preferably, the method of determining the first time correction factor Δ t1 includes:
after the cooking appliance enters the heat preservation mode, the difference between the time point when the upper heating device starts heating and the time point when the temperature of the condensed water attaching position changes from descending to ascending after the heating device starts heating is the first time correction coefficient delta t 1.
Preferably, the method of determining the fifth predetermined temperature T5 based on at least a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of the controller includes:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state;
acquiring a fourth temperature change curve of the controller in a natural cooling state;
defining the slope of each point in a fourth temperature change curve as k2, taking the first point | k2| ≧ first preset slope k2 'as a temperature drop characteristic point in the temperature drop section of the fourth temperature change curve, acquiring a temperature value T5' corresponding to the time point T2 corresponding to the temperature drop characteristic point in the first temperature change curve,
taking temperature value T5 'as the fifth predetermined temperature T5, or, taking fifth predetermined temperature T5 as T5' + Δ T2, Δ T2 is a second temperature correction coefficient.
Preferably, the temperature keeping control method is the temperature keeping control method according to claim 4, and the method of determining the second temperature correction coefficient Δ T2 includes:
determining a second time correction factor at 2;
and acquiring the temperature change amount from the time point T2- Δ T2 to the time point T2 in the fourth temperature change curve, and taking the temperature change amount as the second temperature correction coefficient Δ T2.
Preferably, the method of determining the second time correction factor Δ t2 includes:
after the cooking appliance enters the heat preservation mode, the difference between the time point when the upper heating device starts heating and the time point when the controller temperature changes from descending to ascending after the heating device starts heating is the second time correction coefficient Δ t 2.
On the other hand, the invention adopts the following technical scheme:
a cooking appliance is controlled by the control method.
Preferably, the cooking appliance comprises an electric rice cooker or an electric pressure cooker.
The cooking utensil and the heat preservation control method and the determining method thereof enable the condition that condensed water is obviously gathered and flows down in a strand to be avoided in the heat preservation process by controlling the heating mode of the upper heating device, and compared with the existing mode, the highest temperature and the balance temperature of the controller are obviously reduced, the highest temperature is reduced by 11.3 ℃, the balance temperature is reduced by 12.7 ℃, the surface form of rice is improved, the condition that the surface is white and dry and hard is avoided, meanwhile, different control methods are adopted for heat preservation under different conditions, the cooking effect is better, different use requirements of users are met, and the user experience is improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram illustrating the operation of the thermal insulation control method provided by the present invention;
FIG. 2 illustrates a schematic diagram of a method of determining a fourth predetermined temperature T4 according to the present invention;
FIG. 3 illustrates a schematic diagram of a method of determining a fifth predetermined temperature T5 according to the present invention;
FIG. 4 illustrates a schematic diagram of a method of determining the first time correction factor Δ t1 and the second time correction factor Δ t2 in accordance with the present invention;
fig. 5 shows a schematic diagram of a method of determining the first temperature correction coefficient Δ T1 in accordance with the present invention.
Fig. 6 shows a schematic diagram of a method for determining the second temperature correction coefficient Δ T2 according to the present invention.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. Well-known methods, procedures, and components have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In order to solve the problem that a large amount of condensed water is often formed on an appliance cover in the long-time heat preservation process of existing cooking appliances such as electric cookers, electric pressure cookers and the like, on one hand, the condensed water drops on food can cause the situation of 'white drip' (locally rotten rice), and on the other hand, the condensed water can be gathered into a bunch to flow onto a support ring when the appliance cover is opened, so that the user experience is reduced, the application provides a heat preservation control method of the cooking appliance, wherein the cooking appliance comprises a controller and an upper heating device, the upper heating device can comprise a side heating device arranged on the side of a cooking appliance body and/or a top heating device arranged on the top of the cooking appliance body (for example, arranged on the appliance cover of the body), and preferably, the upper heating device mainly refers to the top heating device arranged on the top of the body. The heat preservation control method comprises the following steps: when the cooking appliance enters a heat preservation mode, the controller obtains the internal temperature T of the cooking appliance and judges whether the internal temperature T is less than or equal to a first preset temperature T1, if so, the cooking appliance is controlled to enter a heating stage, otherwise, the upper heating device is controlled to be in a closed state, and when the internal temperature T is less than or equal to a first preset temperature T1, the cooking appliance is controlled to enter the heating stage, preferably, T1 is more than or equal to 85 ℃ and less than or equal to 110 ℃.
The internal temperature T of the cooking utensil is detected by a temperature measuring element arranged on the cooking utensil.
Specifically, when the cooking appliance enters the heat preservation mode, referring to fig. 1, obtaining an internal temperature T of the cooking appliance, at this time, if T > a first predetermined temperature T1, it is indicated that the current state of the cooking appliance is a hot pot state, at this time, heating is not performed temporarily, the time for stopping the heating phase is longer as the internal temperature T is higher and the rice water amount is larger, after a period of time, the temperature is gradually reduced until T is less than or equal to the first predetermined temperature T1, and controlling the cooking appliance to enter the heating phase. And if the cooking appliance is in the heat preservation mode, T is less than or equal to a first preset temperature T1, and the cold pot state of the current state of the cooking appliance is indicated, controlling the cooking appliance to directly enter a heating stage.
Further, in the heating stage, the controller controls the upper heating device to heat in a predetermined manner. Wherein the predetermined manner comprises: the controller controls the upper heating device to perform intermittent heating, for example, controls the upper heating device to perform heating at a predetermined duty ratio to control the internal temperature T within a certain temperature range. Specifically, as shown in fig. 1, when the internal temperature T is greater than a third predetermined temperature T3, the upper heating device is controlled to be in an off state, and until the internal temperature T is less than or equal to a second predetermined temperature T2, the upper heating device is controlled to be on. Wherein T2 is more than or equal to 80 ℃ and less than or equal to 110 ℃, and T3 is more than or equal to 80 ℃ and less than or equal to 110 ℃. It can be understood that, because the influence of the upper heating device on the internal temperature T is delayed when the upper heating device starts heating or stops heating, the internal temperature T still slightly decreases after the upper heating device starts heating when T is less than or equal to T2, and the internal temperature T still slightly increases after the upper heating device stops heating when T is more than or equal to T3.
Through setting up upper portion heating device for the upper portion heating device during operation can be with the comdenstion water stoving evaporation that the utensil was covered, avoids the comdenstion water gathering to drip on food, appears "dripping white" (local rotten meal), and upper portion heating device adopts the mode of intermittent type heating, makes inside temperature keep in certain temperature range, avoids food dry and hard, is showing the highest temperature and the equilibrium temperature that have reduced the controller simultaneously.
Further, in the heating phase, a power supply voltage of the cooking appliance or an actual voltage of an electric device of the cooking appliance (because the power supply voltage is in a linear relationship with the actual voltage of the electric device) is detected, the electric device may be, for example, an upper heating device, a heating power of the upper heating device is adjusted according to the power supply voltage or the actual voltage, for example, a heating duty ratio of the upper heating device may be adjusted according to the actual voltage to adjust the heating power so as to achieve an effect similar to a designed power, the heating duty ratio is a ratio of a heating duration of the upper heating device to a heating stop duration in a heating cycle, the larger the actual voltage is, the smaller the ratio of the heating duty ratio is, in a specific embodiment, when the power supply voltage is less than or equal to a first predetermined voltage value, the upper heating device is controlled to heat at a first predetermined heating duty ratio, and when the power supply voltage is greater than the first preset voltage value and less than or equal to the second preset voltage value, controlling the upper heating device to heat at a second preset heating duty ratio, and when the power supply voltage is greater than the second preset voltage value, controlling the upper heating device to heat at a third preset heating duty ratio, wherein the first preset voltage value is less than the second preset voltage value, and the ratio of the first preset heating duty ratio > the ratio of the second preset heating duty ratio > the ratio of the third preset heating duty ratio. The first predetermined voltage value is preferably 200 to 220V, further preferably 209V, the second predetermined voltage value is preferably 220 to 240V, further preferably 231V, the first predetermined heating duty ratio is preferably (8-10 s): (22-24s), more preferably 9s:23s, and the second predetermined heating duty ratio is preferably (6-8 s): (24-26s), more preferably 7 s: 25s, the third predetermined heating duty cycle is preferably (4-6 s): (26-28s), more preferably 5 s: 27 s.
The first predetermined temperature T1 may be set based on empirical values, and preferably, in order to achieve precise control, the present application also provides a determination method for determining the first predetermined temperature T1 in the temperature keeping control method as described above, wherein the first predetermined temperature T1 is in the range of [ T4, T5], T5 is a fifth predetermined temperature which is an upper limit of a selectable range of the first predetermined temperature T1 and is mainly affected by preheating of the upper heating means in the rice/porridge cooking stage, and T4 is a fourth predetermined temperature which is a lower limit of the selectable range of the first predetermined temperature T1 and is mainly affected by condensation degree of condensed water during natural cooling, and based on this, the determination method comprises: determining the fourth predetermined temperature T4 based on at least a temperature change of the internal temperature T in a natural cooling state and a temperature change of a place where condensed water adheres on an appliance cover of the cooking appliance; the fifth predetermined temperature T5 is determined at least based on a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of the controller.
Specifically, referring to fig. 2, the method of determining the fourth predetermined temperature T4 includes:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state (namely, the upper heating device is not started to naturally cool the inside of the cooking utensil), wherein the internal temperature T is always reduced;
acquiring a second temperature change curve of a condensed water attachment position on an appliance cover of the cooking appliance in a natural cooling state, wherein the temperature of the condensed water in the natural cooling state rises slightly and then begins to fall because the upper heating device has residual heat after the heating is stopped;
in the temperature falling section of the second temperature change curve, a point with the first temperature lower than the predetermined condensation temperature is obtained as a condensation characteristic point, the condensed water is obviously condensed at the condensation characteristic point, the condensed water can be converged into a stream when the cover is opened, and a temperature value T4 ' corresponding to the time point T1 corresponding to the condensation characteristic point in the first temperature change curve is obtained, so that the temperature value T4 ' can be used as the fourth predetermined temperature T4, and since the influence on the condensed water after the upper heating device is operated is delayed, preferably, the fourth predetermined temperature T4 is T4 ' + Δ T1, and Δ T1 is a first temperature correction coefficient.
As shown in fig. 5, the method for determining the first temperature correction coefficient Δ T1 includes:
determining a first time correction factor at 1;
and acquiring the temperature change amount from the time point T1- Δ T1 to the time point T1 in the second temperature change curve, and taking the temperature change amount as the first temperature correction coefficient Δ T1.
In order to improve the control accuracy, it is preferable that a difference between a time point when the upper heating device starts heating and a time point when the temperature of the condensed water attachment portion changes from decreasing to increasing after the heating device starts heating after the cooking appliance enters the heat preservation mode is the first time correction coefficient Δ t1, and specifically, as shown in fig. 4, after the cooking appliance enters the heat preservation mode, the heating device is controlled to be turned on at a specific time point, and a third temperature variation curve of the condensed water attachment portion on the appliance cover of the cooking appliance during the process is obtained;
in the third temperature change curve, acquiring a time point corresponding to a turning point at which the temperature is changed from descending to ascending for the first time as a first time point; acquiring a time point when the upper heating device starts heating as a second time point; since there is a delay in the temperature rise of the condensed water after the upper heating device starts heating, the difference between the first time point and the second time point is defined as the first time correction coefficient Δ t1, which is different from the first time point.
On the other hand, as shown in fig. 3, the method of determining the fifth predetermined temperature T5 includes:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state, wherein the internal temperature T is always reduced;
acquiring a fourth temperature change curve of the controller in a natural cooling state, wherein the temperature of the controller in the natural cooling state rises slightly due to the fact that the upper heating device has residual heat after heating is stopped, and then the controller begins to fall;
the slope of each point in the fourth temperature change curve is defined as k2, in the temperature drop section of the fourth temperature change curve, the first point | k2| ≧ the first predetermined slope k2 'is taken as a temperature drop characteristic point, at which the controller temperature starts to drop significantly, the temperature value T5' corresponding to the time point T2 corresponding to the temperature drop characteristic point in the first temperature change curve is obtained, the temperature value T5 'may be taken as the fifth predetermined temperature T5, and since there is a delay in the influence of the upper heating device on the controller after operation, it is preferable that the fifth predetermined temperature T5 ═ T5' + Δ T2, and Δ T2 is a second temperature correction coefficient.
As shown in fig. 6, the method for determining the second temperature correction coefficient Δ T2 includes:
determining a second time correction factor at 2;
and acquiring the temperature change amount from the time point T2- Δ T2 to the time point T2 in the fourth temperature change curve, and taking the temperature change amount as the second temperature correction coefficient Δ T2.
In order to improve the control accuracy, it is preferable that the difference between the time point when the upper heating device starts heating and the time point when the controller temperature changes from decreasing to increasing after the heating device starts heating after the cooking appliance enters the heat preservation mode is the second time correction coefficient Δ t 2. Specifically, as shown in fig. 4, after the cooking appliance enters the heat preservation mode, the heating device is controlled to be turned on at a specific time point, and a fifth temperature change curve of the controller in the process is obtained;
according to the fifth temperature change curve, acquiring a time point corresponding to a turning point of which the temperature is changed from descending to ascending for the first time in the fifth temperature change curve as a third time point; acquiring a time point when the upper heating device starts heating as a second time point; since there is a delay in the temperature rise of the controller after the upper heating device starts heating, a third time point is different from a second time point, and the difference between the third time point and the second time point is defined as the second time correction coefficient Δ t 2.
The first preset temperature T1 is determined by the determination method, so that the condensed water is not gathered, the dripping phenomenon is avoided, the temperature of the controller is not too high, and the service life is prolonged.
The application also provides a cooking appliance which is controlled by adopting the control method. Specifically, the cooking appliance comprises an electric cooker or an electric pressure cooker.
Those skilled in the art will readily appreciate that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.
Claims (14)
1. A method for controlling insulation of a cooking appliance, wherein the cooking appliance includes a controller and an upper heating device, the method comprising:
when the cooking appliance enters a heat preservation mode, the controller acquires the internal temperature T of the cooking appliance and judges whether the internal temperature T is less than or equal to a first preset temperature T1, if so, the cooking appliance is controlled to enter a heating stage, otherwise, the upper heating device is controlled to be in a closed state, and when the internal temperature T is less than or equal to a first preset temperature T1, the cooking appliance is controlled to enter the heating stage,
wherein, in the heating stage, the controller controls the upper heating device to heat in a predetermined manner;
the first predetermined temperature T1 is in the range of [ T4, T5], T4 is a fourth predetermined temperature, and T5 is a fifth predetermined temperature;
wherein the fourth predetermined temperature T4 is determined at least based on a temperature change of the internal temperature T in a natural cooling state and a temperature change of a place where condensed water adheres on an appliance cover of the cooking appliance;
wherein the method of determining the fourth predetermined temperature T4 based on at least a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of a condensed water attachment on an appliance cover of the cooking appliance includes:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state;
acquiring a second temperature change curve of a condensed water attachment position on an appliance cover of the cooking appliance in a natural cooling state;
in the temperature descending section of the second temperature change curve, a point with the first temperature lower than the preset condensation temperature is obtained as an agglomeration characteristic point, a temperature value T4' corresponding to the time point T1 corresponding to the agglomeration characteristic point in the first temperature change curve is obtained,
taking temperature value T4 'as the fourth predetermined temperature T4, or, taking fourth predetermined temperature T4 as T4' + Δ T1, Δ T1 is the first temperature correction coefficient.
2. The method for controlling heat preservation according to claim 1, wherein T1 is 85 ℃ to 110 ℃.
3. The heat-retention control method according to claim 1, wherein the predetermined manner includes:
the controller controls the upper heating device to perform intermittent heating.
4. The heat retention control method according to claim 3, wherein the method of controlling the upper heating device to perform intermittent heating includes:
controlling the upper heating device to be in a closed state when the interior temperature T is greater than a third predetermined temperature T3 until the upper heating device is turned on when the interior temperature T is less than or equal to a second predetermined temperature T2, the second predetermined temperature T2< the third predetermined temperature T3.
5. The heat preservation control method according to claim 4, characterized in that T2 is not less than 80 ℃ and not more than 110 ℃; and/or the presence of a gas in the gas,
80℃≤T3≤110℃。
6. the temperature keeping control method according to any one of claims 1 to 5, wherein in the heating phase, a power supply voltage of the cooking appliance or an actual voltage of an electric device of the cooking appliance is detected, and a heating power of the upper heating means is adjusted according to the actual voltage.
7. A determination method for determining a first predetermined temperature T1 in the temperature keeping control method according to any one of claims 1 to 6,
the first predetermined temperature T1 ranges from [ T4, T5], T4 is a fourth predetermined temperature, T5 is a fifth predetermined temperature,
the determination method comprises the following steps:
determining the fourth predetermined temperature T4 based on at least a temperature change of the internal temperature T in a natural cooling state and a temperature change of a place where condensed water adheres on an appliance cover of the cooking appliance; and/or the presence of a gas in the gas,
determining the fifth predetermined temperature T5 at least according to a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of the controller;
wherein the method of determining the fourth predetermined temperature T4 based on at least a temperature variation of the internal temperature T in a natural cooling state and a temperature variation of a condensed water attachment on an appliance cover of the cooking appliance includes:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state;
acquiring a second temperature change curve of a condensed water attachment position on an appliance cover of the cooking appliance in a natural cooling state;
in the temperature descending section of the second temperature change curve, a point with the first temperature lower than the preset condensation temperature is obtained as an agglomeration characteristic point, a temperature value T4' corresponding to the time point T1 corresponding to the agglomeration characteristic point in the first temperature change curve is obtained,
taking temperature value T4 'as the fourth predetermined temperature T4, or, taking fourth predetermined temperature T4 as T4' + Δ T1, Δ T1 is the first temperature correction coefficient.
8. The determination method according to claim 7, wherein the determination method of the first temperature correction coefficient Δ T1 includes:
determining a first time correction factor at 1;
and acquiring the temperature change amount from the time point T1- Δ T1 to the time point T1 in the second temperature change curve, and taking the temperature change amount as the first temperature correction coefficient Δ T1.
9. The method of determining as set forth in claim 8, wherein the method of determining the first time correction factor at 1 includes:
after the cooking appliance enters the heat preservation mode, the difference between the time point when the upper heating device starts heating and the time point when the temperature of the condensed water attaching position changes from descending to ascending after the heating device starts heating is the first time correction coefficient delta t 1.
10. The method for determining according to claim 7, wherein the method for determining the fifth predetermined temperature T5 based on at least a temperature change of the internal temperature T and a temperature change of the controller in a natural cooling state comprises:
acquiring a first temperature change curve of the internal temperature T in a natural cooling state;
acquiring a fourth temperature change curve of the controller in a natural cooling state;
defining the slope of each point in a fourth temperature change curve as k2, taking the first point | k2| ≧ first preset slope k2 'as a temperature drop characteristic point in the temperature drop section of the fourth temperature change curve, acquiring a temperature value T5' corresponding to the time point T2 corresponding to the temperature drop characteristic point in the first temperature change curve,
taking temperature value T5 'as the fifth predetermined temperature T5, or, taking fifth predetermined temperature T5 as T5' + Δ T2, Δ T2 is a second temperature correction coefficient.
11. The determination method according to claim 10, wherein the temperature keeping control method is the temperature keeping control method according to claim 4, and the determination method of the second temperature correction coefficient Δ T2 includes:
determining a second time correction factor at 2;
and acquiring the temperature change amount from the time point T2- Δ T2 to the time point T2 in the fourth temperature change curve, and taking the temperature change amount as the second temperature correction coefficient Δ T2.
12. The determination method according to claim 11, wherein the method of determining the second time correction coefficient Δ t2 includes:
after the cooking appliance enters the heat preservation mode, the difference between the time point when the upper heating device starts heating and the time point when the controller temperature changes from descending to ascending after the heating device starts heating is the second time correction coefficient Δ t 2.
13. Cooking appliance, characterized in that it is controlled with a control method according to one of claims 1 to 6.
14. The cooking appliance of claim 13, wherein the cooking appliance comprises an electric rice cooker or an electric pressure cooker.
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| JP2020570413A JP7152526B2 (en) | 2018-09-30 | 2018-12-22 | Cookware and its heat retention control method and determination method |
| PCT/CN2018/122915 WO2020062650A1 (en) | 2018-09-30 | 2018-12-22 | Cooking appliance, and heat preservation control method and determination method therefor |
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| WO2020176477A1 (en) | 2019-02-25 | 2020-09-03 | Sharkninja Operating Llc | Cooking system with guard |
| US20210121012A1 (en) | 2020-03-30 | 2021-04-29 | Sharkninja Operating Llc | Cooking device and components thereof |
| CN112484087B (en) * | 2020-10-13 | 2022-12-16 | 华帝股份有限公司 | Cold state identification method of kitchen range and kitchen range thereof |
| CN113782814B (en) * | 2021-08-02 | 2022-12-06 | 珠海泰坦新动力电子有限公司 | Control method and system for high-temperature chemical cabinet |
| CN113455918A (en) * | 2021-08-24 | 2021-10-01 | 珠海格力电器股份有限公司 | Control method and device, electronic equipment, cooking utensil and storage medium |
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| JP3082642B2 (en) * | 1995-11-06 | 2000-08-28 | タイガー魔法瓶株式会社 | Electric rice cooker |
| JP3456150B2 (en) | 1998-07-28 | 2003-10-14 | 東芝ホームテクノ株式会社 | Insulated pot |
| JP3580141B2 (en) | 1998-08-05 | 2004-10-20 | 松下電器産業株式会社 | Jar rice cooker |
| JP3857838B2 (en) | 1999-08-27 | 2006-12-13 | 大阪瓦斯株式会社 | Insulated rice cooking method and rice cooker |
| JP2002355173A (en) | 2001-06-01 | 2002-12-10 | Matsushita Electric Ind Co Ltd | Rice cooker and warmer |
| JP3709844B2 (en) | 2002-01-11 | 2005-10-26 | タイガー魔法瓶株式会社 | rice cooker |
| JP4294652B2 (en) * | 2006-02-22 | 2009-07-15 | パナソニック株式会社 | Jar rice cooker |
| JP4913171B2 (en) * | 2009-02-12 | 2012-04-11 | パナソニック株式会社 | Jar rice cooker |
| JP4901934B2 (en) * | 2009-09-30 | 2012-03-21 | パナソニック株式会社 | rice cooker |
| CN102687985B (en) * | 2011-03-23 | 2014-08-27 | 珠海格力电器股份有限公司 | Electric cooker and heat preservation method thereof |
| CN102389254B (en) * | 2011-09-02 | 2013-12-25 | 广东伊立浦电器股份有限公司 | Temperature control method of electric heating kitchenware |
| ITMI20130687A1 (en) * | 2013-04-24 | 2014-10-25 | De Longhi Appliances Srl | MACHINE FOR COOKING. |
| CN104345752A (en) * | 2013-08-06 | 2015-02-11 | 美的集团股份有限公司 | Electric rice cooker and control method and heat insulation control device thereof |
| CN104932582B (en) * | 2014-04-01 | 2017-03-15 | 中国建筑材料科学研究总院 | A kind of control method for preventing glass condensation frosting |
| CN105852618A (en) * | 2015-01-23 | 2016-08-17 | 佛山市顺德区美的电热电器制造有限公司 | Control method and control device of cooking appliance and cooking appliance |
| CN107013955B (en) * | 2016-01-27 | 2019-10-29 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooking pot and its control method |
| CN107343742B (en) * | 2016-05-06 | 2022-12-30 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and anti-condensation control method thereof |
| CN108324084B (en) * | 2017-01-20 | 2021-08-31 | 佛山市顺德区美的电热电器制造有限公司 | Heat preservation control system and method of cooking appliance and cooking appliance |
| CN108514346B (en) * | 2018-05-28 | 2021-12-03 | 九阳股份有限公司 | Pulping method of soybean milk machine |
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