CN109259611B - Cooking utensil and heat preservation control method thereof - Google Patents
Cooking utensil and heat preservation control method thereof Download PDFInfo
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- CN109259611B CN109259611B CN201811158822.7A CN201811158822A CN109259611B CN 109259611 B CN109259611 B CN 109259611B CN 201811158822 A CN201811158822 A CN 201811158822A CN 109259611 B CN109259611 B CN 109259611B
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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
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Abstract
The invention discloses a cooking utensil and a heat preservation control 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 at a preset average power P0. 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 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 apparatus and a heat preservation control method thereof, so as to solve the problem that the heat preservation under different conditions is not adaptively adjusted during 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, during the heating phase, the controller controls the upper heating device to heat at a predetermined average power P0.
Preferably, T1 is between 85 ℃ and 110 ℃.
Preferably, in the heating phase, the controller controls the upper heating device to heat at a predetermined duty ratio.
On the other hand, the invention adopts the following technical scheme:
a determination method for determining a predetermined average power P0 in the temperature keeping control method as described above,
the predetermined average power P0 ranges from (P2, P1), P1 is a first average power, P2 is a second average power,
the determination method comprises the following steps:
determining the second average power according to the temperature of a condensed water attachment on an appliance cover of the cooking appliance; and/or the presence of a gas in the gas,
determining the first average power according to the temperature of the controller.
Preferably, the method of determining the second average power according to the temperature of the condensed water attachment on the appliance cover of the cooking appliance includes:
acquiring a second temperature change line of the temperature of a condensed water attachment part on an appliance cover of the cooking appliance along with the average power change of the upper heating device;
and in the second temperature change line, taking the average power corresponding to the lower limit temperature point of the condensed water attaching position as the second average power.
Preferably, the lower temperature limit point of the condensed water attachment is a dew point temperature of an internal environment of the cooking appliance.
Preferably, the method of determining the first average power according to the temperature of the controller comprises:
acquiring a first temperature change line of the temperature of the controller along with the average power change of the upper heating device;
and in the first temperature change line, taking the average power corresponding to the temperature upper limit point of the controller as the first average power.
Preferably, the upper temperature limit point of the controller is the rated upper operating temperature limit value of the controller.
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 flow chart of a method for controlling heat preservation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a method for determining a first average power and a second average power according to the present invention;
fig. 3 shows a schematic temperature/time curve of the heating according to the invention with a predetermined average power in the heating phase.
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. As shown in fig. 1, the heat preservation control method includes: 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 a heat preservation mode, the internal temperature T of the cooking appliance is obtained, 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 higher the internal temperature T and the larger the rice water amount, the longer the time for stopping the heating stage is, after a period of time, the temperature is gradually reduced, and when T is less than or equal to the first predetermined temperature T1, the cooking appliance is controlled to enter the heating stage. 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 at a preset average power P0, the preset average power P0 is 15w for example, the upper heating device is arranged, so that the condensed water on the appliance cover can be dried and evaporated when the upper heating device works, the condensed water is prevented from being accumulated and dripping on food, and the phenomenon of 'dripping white' (local rotten rice) is avoided, and the upper heating device adopts an intermittent heating mode, so that the internal temperature is kept within a certain temperature range, the food is prevented from being dry and hard, and the maximum temperature and the equilibrium temperature of the controller are reduced remarkably.
The upper heating device may be controlled to maintain the predetermined average power P0, for example, by controlling the upper heating device to heat at a predetermined duty ratio, and the predetermined duty ratio may be maintained or may be varied within a predetermined range during the heating stage, so that the temperature of the place where the condensed water adheres may be maintained. The predetermined duty cycle is, for example, 9: 23, i.e. in one heating cycle, the upper heating means continues heating for 9s, after which the heating is stopped for a duration of 23 s.
The predetermined average power P0 is in the range of (P2, P1), P1 is a first average power, and P2 is a second average power, wherein the first average power P1 is related to the temperature of the controller, the second average power P2 is related to the temperature of the condensed water attachment on the appliance cover, the first average power P1 and the second average power P2 can be set according to empirical values, for example, P1 is 10w, P2 is 20w, preferably, in order to achieve precise control, the present application further provides a determination method for determining the predetermined average power P0 in the heat preservation control method as described above.
Wherein the first average power P1 is determined according to the temperature of the controller, and specifically, as shown in fig. 2, the method for determining the first average power P1 according to the temperature of the controller comprises:
acquiring a first temperature change line of the temperature of the controller along with the average power change of the upper heating device;
in the first temperature change line, the average power corresponding to the upper temperature limit point of the controller is taken as the first average power P1.
Preferably, the temperature of the controller in the first temperature change curve refers to an equilibrium temperature of the controller, that is, an average temperature in a period of time when a temperature change amount in the period of time is less than or equal to a predetermined temperature change amount, for example, 30 to 90 minutes, preferably 60 minutes, and the predetermined temperature change amount is, for example, 0.5 ℃ to 1.5 ℃, preferably 1 ℃.
It will be understood that the upper temperature limit of the controller described herein is the highest temperature limit at which the controller can operate properly. For example, in one specific embodiment, the upper temperature limit of the controller is the upper temperature limit of the rated operating temperature of the controller, and the rated operating temperature of different controllers is different, and preferably, the upper temperature limit is in the range of 60 ℃ to 90 ℃.
Further, the method of determining the second average power P2 according to the temperature of the condensed water attachment on the appliance cover of the cooking appliance, specifically, as shown in fig. 2, the method of determining the second average power P2 according to the temperature of the condensed water attachment on the appliance cover of the cooking appliance includes:
acquiring a second temperature change line of the temperature of a condensed water attachment part on an appliance cover of the cooking appliance along with the average power change of the upper heating device;
in the second temperature change line, the average power corresponding to the lower limit temperature point at which the condensed water adheres is taken as the second average power P2.
Preferably, the temperature at which the condensed water adheres in the above-described second temperature change curve refers to an equilibrium temperature at which the condensed water adheres, that is, an average temperature over a period of time when a temperature change amount over the period of time is less than or equal to a predetermined temperature change amount, for example, from 30 to 90 minutes, preferably 60 minutes, and the predetermined temperature change amount is, for example, from 0.5 ℃ to 1.5 ℃, preferably 1 ℃.
It is understood that the lower limit temperature point of the condensed water attachment point mentioned herein means that the condensed water at the condensed water attachment point cannot be dried by heating with the corresponding average power below the lower limit temperature point. For example, in one specific embodiment, the lower temperature limit at which the condensed water adheres is the dew point temperature of the internal environment of the cooking appliance, i.e., the saturation temperature, preferably 80 ℃ to 110 ℃.
The preset average power P0 is determined by the determination method, so that the condensed water is not gathered, the white dripping phenomenon is avoided, the temperature of the controller is not too high, and the service life is prolonged.
When the average power is medium (the average power is equal to or close to P1) and the average power is small (the average power is close to P2), the variation curve of the internal temperature of the cooking utensil along with the time is shown in fig. 3, as can be seen from fig. 3, when the average power is small, the scheme that the average power is small is better in the heating stage, specifically, the top detection element of the cooking utensil such as an electric cooker, for example, the top temperature sensing bag of the electric cooker, for example, the needle-type temperature sensing bag, the cake-type temperature sensing bag, the hidden temperature sensing bag and the like are adopted, the temperature measurement accuracy and sensitivity difference brought by different designs can be reduced by small-power continuous heating, and in addition, when the heating power is large, the temperature of the top of the electric cooker is high, the small-power continuous heating can also prevent the cooker damage (such as melting of injection molding parts) caused by the failure of the top.
In the heat preservation control method provided by the application, the predetermined average power P0 is limited within the range of (P2, P1), when the cooking utensil enters the heat preservation mode from a hot pot state, the superposition effect of the residual heat can be weakened because P0 is not less than P1, when the cooking utensil enters the heat preservation mode from a cold pot state, the temperature of a condensed water attachment part is difficult to rapidly increase because P0 is not less than P1, and the condensed water attachment part can be heated in advance because P0 is more than P2, so that the condensed water attachment part can be preheated before the condensed water is formed.
In addition, because P0 is less than or equal to P1, when the temperature measuring element such as a temperature sensing bulb fails, the risk of melting of an injection molding part and the like is avoided.
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 (9)
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 at a preset average power P0 so as to dry the condensed water on the appliance cover;
the predetermined average power P0 is in the range of (P2, P1), P1 is a first average power, P2 is a second average power, and the predetermined average power P0 is determined by:
determining the second average power according to the temperature of a condensed water attachment on an appliance cover of the cooking appliance; and/or the presence of a gas in the gas,
determining the first average power according to the temperature of the controller.
2. The method for controlling heat preservation according to claim 1, wherein T1 is 85 ℃ to 110 ℃.
3. The temperature keeping control method according to claim 1, wherein the controller controls the upper heating device to heat at a predetermined duty ratio in the heating stage.
4. The insulation control method according to any one of claims 1 to 3, wherein the method of determining the second average power according to the temperature of a place where condensed water adheres on an appliance cover of the cooking appliance includes:
acquiring a second temperature change line of the temperature of a condensed water attachment part on an appliance cover of the cooking appliance along with the average power change of the upper heating device;
and in the second temperature change line, taking the average power corresponding to the lower limit temperature point of the condensed water attaching position as the second average power.
5. The insulation control method according to claim 4, wherein the lower limit temperature at which the condensed water adheres is a dew point temperature of an internal environment of the cooking appliance.
6. A temperature-keeping control method as set forth in any one of claims 1 to 3, wherein the method of determining the first average power based on the temperature of the controller includes:
acquiring a first temperature change line of the temperature of the controller along with the average power change of the upper heating device;
and in the first temperature change line, taking the average power corresponding to the temperature upper limit point of the controller as the first average power.
7. The heat-retention control method according to claim 6, wherein the upper temperature limit point of the controller is a rated upper operating temperature limit value of the controller.
8. A cooking appliance characterized by being controlled by the control method as claimed in one of claims 1 to 7.
9. The cooking appliance of claim 8, wherein the cooking appliance comprises an electric rice cooker or an electric pressure cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811158822.7A CN109259611B (en) | 2018-09-30 | 2018-09-30 | Cooking utensil and heat preservation control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811158822.7A CN109259611B (en) | 2018-09-30 | 2018-09-30 | Cooking utensil and heat preservation control method thereof |
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| CN109259611A CN109259611A (en) | 2019-01-25 |
| CN109259611B true CN109259611B (en) | 2020-12-11 |
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| CN113885615B (en) * | 2020-07-03 | 2023-03-24 | 九阳股份有限公司 | Control method for intermittent heating and cooking appliance |
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| JP3444292B2 (en) * | 2001-04-12 | 2003-09-08 | タイガー魔法瓶株式会社 | rice cooker |
| CN201387560Y (en) * | 2009-04-21 | 2010-01-20 | 戴宇波 | Heat-preservation control circuit of electric pressure cooker |
| 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 |
| CN108433527B (en) * | 2018-04-26 | 2021-06-22 | 华帝股份有限公司 | Electric steam box control method and electric steam box |
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