WO2021169340A1 - A control method for a cooking appliance and a cooking appliance - Google Patents

A control method for a cooking appliance and a cooking appliance Download PDF

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Publication number
WO2021169340A1
WO2021169340A1 PCT/CN2020/123730 CN2020123730W WO2021169340A1 WO 2021169340 A1 WO2021169340 A1 WO 2021169340A1 CN 2020123730 W CN2020123730 W CN 2020123730W WO 2021169340 A1 WO2021169340 A1 WO 2021169340A1
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WO
WIPO (PCT)
Prior art keywords
cooking
temperature
predetermined
control method
heating module
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PCT/CN2020/123730
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French (fr)
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WO2021169340A9 (en
Inventor
Lulu YANG
Tao Liu
Shuoshuo ZHU
Original Assignee
Zhejiang Supor Electrical Appliances Manufacturing Co., Ltd.
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Application filed by Zhejiang Supor Electrical Appliances Manufacturing Co., Ltd. filed Critical Zhejiang Supor Electrical Appliances Manufacturing Co., Ltd.
Publication of WO2021169340A1 publication Critical patent/WO2021169340A1/en
Publication of WO2021169340A9 publication Critical patent/WO2021169340A9/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1951—Control of temperature characterised by the use of electric means with control of the working time of a temperature controlling device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • 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
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • 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
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
    • A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements

Definitions

  • the invention relates to the field of electrical kitchen appliances, and relates in particular to a control method for a cooking appliance and a cooking appliance.
  • Cooking appliances are one of the commonly used electrical appliances in a home kitchen. They are widely used for cooking various food materials, such as rice, beans, and even cakes.
  • Existing cooking appliance generally has a cooking space and a heating wire or a heating plate used for heating is provided only at the bottom of the cooking space.
  • a cooking appliance such as a baking machine is used to bake a cake
  • heat inside the cooking space is only transmitted upwards from the bottom, thus the top of the cake is not well heated.
  • the overall baking result of the cake is thus affected and the cake has poor quality and taste.
  • a control method for a cooking appliance has a cooking space, and comprises:
  • a bottom heating module used for heating a bottom part of the cooking space
  • a top heating module used for heating a top part of the cooking space
  • control module configured to control the cooking appliance to execute the control method
  • control method comprising the following steps:
  • a top heating module and a bottom heating module for heating the cooking space are provided in the cooking appliance.
  • a food material is heated by the bottom heating module from the bottom part of the cooking space; and after a predetermined duration of time, the top heating module is activated, the food material is heated by the top heating module from the top part of the cooking space, with the top part of the cooking space maintained at a predetermined temperature.
  • the term “maintained at a predetermined top temperature Q” should be understood as comprising the cases in which the temperature of the top part of the cooking space is maintained nearby the predetermined temperature Q, for example maintained in the range of Q ⁇ 5°C, or preferably in the range of Q ⁇ 2°C.
  • the top part of the cooking space maintained at or nearby the predetermined top temperature Q by repeated activation and deactivation of the top heating module.
  • water inside the food material can be evacuated from the top part by heating, so as to prevent the inside of the food material from being too moist.
  • the method allows to prevent the food material from being under-baked in the bottom part but over-baked in the top part.
  • the food material in the cooking space can be heated by the combination of the top heating module and the bottom heating module, which allows the food material in the cooking space to be uniformly heated, so as to improve the quality and taste of the food material and to enhance a user’s experience.
  • the control method further comprises a preheating step executed before the step (a) : controlling the bottom heating module to heat the bottom part of the cooking space at an initial power P 0 , so that the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0 and is maintained for a predetermined heating duration T 0 .
  • a preheating step executed before the step (a) : controlling the bottom heating module to heat the bottom part of the cooking space at an initial power P 0 , so that the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0 and is maintained for a predetermined heating duration T 0 .
  • the initial power P 0 satisfies 30%P rated ⁇ P 0 ⁇ 50%P rated , wherein P rated is the rated power of the cooking appliance.
  • the heating effect of the food material can be improved, thereby ensuring the cooking quality and taste of the food material.
  • the initial bottom temperature B 0 satisfies: 20°C ⁇ B 0 ⁇ 35°C; the predetermined heating duration T 0 satisfies: 20 minutes ⁇ T 0 ⁇ 100 minutes.
  • the initial heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • the predetermined top temperature Q satisfies: 120°C ⁇ Q ⁇ 250°C.
  • the initial heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • the step (a) comprises:
  • a first cooking phase controlling the bottom heating module to heat the bottom part of the cooking space at a first power P 1 that is for example higher than the initial power P 0 , so that the temperature of the bottom part of the cooking space reaches a first predetermined bottom temperature B 1 .
  • the food material can be heated by gradually rising the temperature, improving the heating effect of the food material and ensuring the cooking quality and taste of the food material.
  • the first power P 1 satisfies: 80%P rated ⁇ P 1 ⁇ 100%P rated , wherein P rated is the rated power of the cooking appliance.
  • the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • the first predetermined bottom temperature B 1 satisfies: 70°C ⁇ B 1 ⁇ 100°C.
  • the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • step (a) further comprises:
  • a second cooking phase controlling the bottom heating module to heat the bottom part of the cooking space at a second power P 2 that is lower than the first power P 1 , so that the temperature of the bottom part of the cooking space reaches a second predetermined bottom temperature B 2 .
  • the food material can be further heated, thereby improving the heating effect of the food material and ensuring the cooking quality and taste of the food material.
  • the second power P 2 satisfies: 50%P rated ⁇ P 2 ⁇ 80%P rated , wherein P rated is the rated power of the cooking appliance.
  • the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • the second predetermined bottom temperature B 2 satisfies: 100°C ⁇ B 2 ⁇ 120°C and B 2 -B 1 ⁇ 10°C.
  • the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • step (a) further comprises:
  • a third cooking phase controlling the bottom heating module to heat the bottom part of the cooking space at a third power P 3 that is lower than the second power P 2 , so that the temperature of the bottom part of the cooking space reaches a third predetermined bottom temperature B 3 .
  • the third power P 3 satisfies: 20%P rated ⁇ P 3 ⁇ 50%P rated , wherein P rated is the rated power of the cooking appliance.
  • the food material can be further heated, thereby improving the heating effect of the food material and ensuring the cooking quality and taste of the food material.
  • the third predetermined bottom temperature B 3 satisfies: 120°C ⁇ B 3 ⁇ 150°C and B 3 -B 2 ⁇ 10°C.
  • the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • the first predetermined duration T 1 satisfies: 10 minutes ⁇ T 1 ⁇ 30 minutes.
  • the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
  • the cooking appliance according to the invention is provided with a top heating module and a bottom heating module for heating a cooking space.
  • the food material is heated by the bottom heating module from the bottom part of the cooking space; and after a predetermined duration of time has elapsed, the top heating module is activated, the food material is heated by the top heating module from the top part of the cooking space, with the top part of the cooking space maintained at a predetermined temperature.
  • water inside the food material can be evacuated from the top part by heating, so as to prevent the inside of the food material from being too moist.
  • the method allows to prevent the food material from being under-baked in the bottom part but over-baked in the top part.
  • the food material in the cooking space can be heated by the combination of the top heating module and the bottom heating module, which allows the food material in the cooking space to be uniformly heated, so as to improve the quality and taste of the food material and to enhance a user’s experience.
  • Figure 1 is a schematic flow chart of a control method for a cooking appliance according to an embodiment of the invention.
  • Figure 2 is a detailed schematic flow chart of a control method for a cooking appliance according to an embodiment of the invention..
  • the cooking appliance provided by the invention can be a rice cooker, a baking machine, etc.
  • the cooking appliance can comprise a pot body and a cover body.
  • the pot body can has an inner pot receiving space of cylindrical shape or another shape.
  • An inner pot can be freely placed into the inner pot receiving space or removed from the inner pot receiving space, so as to facilitate the cleaning of the inner pot.
  • the inner port is generally made of a metal material, has a circular opening on an upper surface, and is used for containing a material to be heated, such as rice and soup.
  • the inner pot can comprise a revolved body formed by a pot wall and having an upper opening and an inner chamber.
  • the volume of the inner pot is generally smaller than 6 L.
  • the volume of the inner pot can be 2 L or 4 L.
  • the cover body comprises a removable cover and an upper cover.
  • the removable cover is removably connected to the upper cover.
  • the cover body can be pivotably connected to the pot body via a pivotal axis and used for covering the pot body. When the cover body covers the pot body, a cooking space is formed between the removable cover and the inner pot.
  • the pot body can also comprise a top heating module and a bottom heating module used for heating the inner pot.
  • the bottom heating module is at least partially provided below the cooking space (for example, it can be provided in the pot body) , so as to be used for heating a bottom part of the cooking space.
  • the top heating module is at least partially provided above the cooking space (for example, it can be provided in the cover body) , so as to be used for heating a top part of the cooking space.
  • the bottom heating module can be a heating coil or a heating plate provided below the inner pot
  • the top heating module can be a heating coil or a heating plate provided in the cover body.
  • the cooking appliance can also comprise a temperature detection module, for example, a top temperature detection module provided in the upper cover and/or a bottom temperature detection module provided below the inner pot receiving space.
  • the bottom temperature detection module and the top temperature detection module can be thermistors.
  • the bottom temperature detection module and the top temperature detection module are both connected to a control module of the cooking appliance, so as to send a signal of detected temperature to the control module after detecting the temperature of the inner pot, so that the control module can achieve a more precise control of the cooking process based on the temperature signal.
  • the bottom temperature detection module can detect the temperature of a bottom wall of the inner pot.
  • the bottom temperature detection module can be in direct or indirect contact with the bottom wall.
  • the pot body can also comprise a power board, and the pot body is further provided with a display board (also called “panel” ) .
  • the power board can power the control module, the display board, etc.
  • the cooking appliance can comprise a control module.
  • the control module can be a micro processing unit (MCU) , or can be called a micro controller or a micro processor.
  • MCU micro processing unit
  • the control method used for a cooking appliance provided in the embodiments of the invention can be used for the above-described cooking appliance.
  • the control method can be used for a cooking appliance such as a baking machine so as to cook a food material such as a cake.
  • a food material such as a cake.
  • another similar food material can be cooked.
  • the control method is further described in reference to Figure 1 and Figure 2, wherein, the cooking of a cake can comprise a fermentation step and a baking step.
  • control method comprises:
  • controlling the bottom heating module to heat the bottom part of the cooking space at an initial power P 0 , so that the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0 , and is maintained for a predetermined heating duration T 0 .
  • this step corresponds to a fermentation step for cooking a cake.
  • a user first places a food material such as dough in the cooking space, and then inputs a cooking function such as “cake cooking” into the cooking appliance.
  • the cooking appliance thus starts to execute a preset cooking program (for example, executes a cooking program that starts to make a cake) .
  • the control module of the cooking appliance immediately starts to count time, and at the same time activates the bottom heating module to heat the bottom part of the cooking space at the initial power P 0 .
  • the temperature of the food material at the bottom part of the cooking space starts to rise.
  • the temperature of the bottom part of the cooking space reaches the initial bottom temperature B 0 , the temperature of the bottom part of the cooking space is maintained for the predetermined heating duration T 0 .
  • the initial power P 0 can be selected from the range of being larger than 30%of a rated power P rated but smaller than 50%of the rated power P rated , wherein the rated power P rated is the rated power of the cooking appliance in normal operation.
  • the food material is thus heated at a relatively low power at the initial phase of executing the cooking function.
  • the predetermined heating duration T 0 is selected from the range of 20 minutes to 100 minutes.
  • the initial bottom temperature B 0 is selected from the range of 20°C to 35°C.
  • the food material can be fermented, ensuring the cooking quality and taste of the food material.
  • control method further comprises:
  • this step corresponds to a baking step for cooking a cake.
  • the baking step is provided such that only after the bottom heating module has been heating for a predetermined duration (i.e., the first predetermined duration T 1 ) , is the top heating module controlled to start heating.
  • the top part of the dough is baked after its water content has evaporated. Compared to activating the top heating module and the bottom heating module at the same time, it can further ensure the cooking quality and taste of the food material and provides a better cooking effect.
  • the first predetermined duration T 1 is selected from the range of 10 minutes to 30 minutes. This range is a preferred range obtained by the inventor after numerous tests.
  • the first predetermined duration T 1 is shorter than 10 minutes, the top part of the cake is baked for too long, the top part of the finished cake will have a dark color and is relatively hard. In addition, a hard crust of 5 to 10 cm thick will be produced, which results in a poor taste when a user eats it.
  • the top part is baked for too long, the temperature difference between the bottom part and the top part of the cake is small.
  • the first predetermined duration T 1 is longer than 30 minutes, the top part of the cake is not heated long enough, causing the top part to be light and white in color and fail to provide the caramelization and crispiness of baking, thus resulting in a poor taste.
  • the first predetermined duration T 1 is 25 minutes. At this duration, the top part of the finished cake is uniformly and appropriately colored, and has an appropriately crisp crust, a tender inner structure, an appropriate moisture, and an optimal taste.
  • the predetermined top temperature Q is selected from the range of 120°C to 250°C.
  • the baking step can comprise three phases so as to heat the food material in the cooking space in the manner of gradually raising its temperature.
  • the food material can be heated during one, two, four, or more phases.
  • the baking step comprises a first cooking phase, a second cooking phase and a third cooking phase.
  • the bottom heating module is controlled to heat the bottom part of the cooking space at a first power P 1 that is higher than the initial power P 0 , so that the temperature of the bottom part of the cooking space reaches a first predetermined bottom temperature B 1 .
  • the temperature of the bottom part of the food material in the cooking space should be brought to the first predetermined bottom temperature B 1 .
  • the first power P 1 can be selected from the range of being higher than 80%of the rated power P rated but lower than 100%of the rated power P rated .
  • the first predetermined bottom temperature B 1 can be selected from the range of 70°C to 100°C.
  • the second cooking phase begins.
  • the bottom heating module is controlled to heat the bottom part of the cooking space at a second power P 2 that is higher than the initial power P 0 but lower than the first power P 1 , so that the temperature of the bottom part of the cooking space reaches a second predetermined bottom temperature B 2 .
  • the temperature of the bottom part of the food material in the cooking space should be brought to the second predetermined bottom temperature B 2 .
  • the second power P 2 can be selected from the range of being higher than 50%of the rated power P rated but lower than 80%of the rated power P rated .
  • the second predetermined bottom temperature B 2 can be selected from the range of 100°C to 120°C, with B 2 -B 1 ⁇ 10°C.
  • the third cooking phase begins.
  • the bottom heating module is controlled to heat the bottom part of the cooking space at a third power P 3 that is lower than the second power P 2 , so that the temperature of the bottom part of the cooking space reaches a third predetermined bottom temperature B 3 .
  • the temperature of the bottom part of the food material in the cooking space should be brought to the third predetermined bottom temperature B 3 .
  • the third predetermined bottom temperature B 3 can be selected from the range of 120°C to 150°C.
  • the third power P 3 can be selected from the range of being higher than 20%of the rated power P rated but lower than 50%of the rated power P rated .
  • the third predetermined bottom temperature B 3 can be selected from the range of 120°C to 150°C, with B 3 -B 2 ⁇ 10°C.
  • the bottom heating module and the top heating module can be controlled to stop, and it is determined whether the timed duration T timed in the baking step has reached a second predetermined duration T 2 . If yes, then the cooking process can be stopped. If the timed duration T timed has not reached the second predetermined duration T 2 , then return to the third cooking phase, wherein the bottom part of the cooking space is heated again at the third power P 3 , so as to effectuate cycling, until the timed duration T timed reaches the second predetermined duration T 2 .
  • the second predetermined duration T2 satisfies: 20 minutes ⁇ T2 ⁇ 100 minutes.
  • the third cooking phase if it is detected that the temperature of the bottom part of the cooking space has not reached the third predetermined bottom temperature B 3 , it can also check whether the timed duration T timed in the baking step has reached the second predetermined duration T 2 . If yes, then cooking can be stopped. If the timed duration T timed has not reached the second predetermined duration T 2 , then return to the third cooking phase to continue to heat the bottom part of the cooking space at the third power P 3 , so as to effectuate cycling, until the timed duration T timed reaches the second predetermined duration T 2 .
  • the temperature of the top part of the cooking space can be maintained at or nearby the predetermined top temperature Q by repeated activation and deactivation of the top heating module.
  • the temperature of the top part of the food material in the cooking space is kept in the desired range, so as to ensure the cooking quality and taste of the food material.
  • the rated power of the baking machine P rated 1200W.
  • the cooking parameters of the cooking appliance in this embodiment are:
  • a user places the dough for cooking a cake into the cooking space, and then inputs the cooking function of “cake cooking” into the cooking appliance.
  • the control module of the cooking appliance continues to count time.
  • the baking step begins.
  • the timed duration T timed is reset to zero, and restarts to count time.
  • the cooking appliance determines whether the timed duration T timed has reached a first predetermined duration T 1 .
  • T 1 30 minutes
  • the top heating module of the cooking appliance starts to heat the top part of the cooking space.
  • the top heating module stops heating.
  • a top temperature detection module of the cooking appliance continuously monitors the temperature of the top part of the cooking space.
  • the bottom heating module there can be a first cooking phase, a second cooking phase and a third cooking phase.
  • the third cooking phase begins
  • the cooking function is ended. Otherwise, it returns to the third cooking phase to continue to heat the bottom part of the cooking space.
  • the cooking function is ended. Otherwise, it returns to the third cooking phase to continue to heat the bottom part of the cooking space
  • the top heating module and the bottom heating module in the cooking appliance can be controlled to cooperate to heat the heating space.
  • the food material in the cooking space can be brought to the initial bottom temperature B 0 , and maintained for the predetermined heating duration T 0 .
  • a food material made of such as self-raising flour can be fully fermented.
  • the bottom heating module can be used to heat the bottom part of the food material in several phases in the manner of gradually raising the temperature.
  • the top part of the food material is heated by the top heating module, so that the temperature of the top part of the food material is maintained at the predetermined top temperature Q or within a certain range nearby Q. Thanks to the above-described control method, the food material in the cooking space can be uniformly heated, ensuring the cooking quality and taste of the food material.
  • a first set of parameter settings :
  • a second set of parameter settings :
  • a third set of parameter settings :
  • the rated power of the cooking appliance can take another value, and the operating parameters corresponding to it can also change with it and according to needs.
  • the cooking appliance comprises a bottom heating module, a top heating module, a temperature detection module, and a control module configured to control the cooking appliance to execute the control method in the above-described embodiments to perform cooking.
  • the cooking appliance can be a baking machine.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Food Science & Technology (AREA)
  • Baking, Grill, Roasting (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

A cooking appliance has a cooking space, and comprises a bottom heating module, a top heating module, and a temperature detection module. A control method for the cooking appliance comprises: controlling the bottom heating module to heat a bottom part of the cooking space, and at the same time, starting to record a timed duration T timed; when the timed duration T timed reaches a first predetermined duration T 1, controlling the top heating module to heat a top part of the cooking space, and maintaining the temperature of the top part of the cooking space at a predetermined top temperature Q; when the timed duration T timed reaches a second predetermined duration T 2, controlling the bottom heating module and the top heating module to stop heating. Thus, a food material in the cooking space can be uniformly heated, thus improving the quality and taste of the food material and enhancing a user's experience.

Description

A Control Method for a Cooking Appliance and a Cooking Appliance Field of the Invention
The invention relates to the field of electrical kitchen appliances, and relates in particular to a control method for a cooking appliance and a cooking appliance.
Background of the Invention
Cooking appliances are one of the commonly used electrical appliances in a home kitchen. They are widely used for cooking various food materials, such as rice, beans, and even cakes. Existing cooking appliance generally has a cooking space and a heating wire or a heating plate used for heating is provided only at the bottom of the cooking space. When a cooking appliance such as a baking machine is used to bake a cake, heat inside the cooking space is only transmitted upwards from the bottom, thus the top of the cake is not well heated. The overall baking result of the cake is thus affected and the cake has poor quality and taste.
Therefore, it is needed to provide a control method for a cooking appliance and a cooking appliance to at least partially solve the above-described problem.
Summary of the Invention
A series of simplified concepts are introduced in the Summary of the Invention, which will be described in detail in the Detailed Description of the Invention. The Summary of the Invention of the invention is not meant to limit the key characteristics and essential technical features of the claimed technical solutions, or meant to define the protection scope of the claimed technical solutions.
According to a first aspect of the invention, a control method for a cooking appliance is provided. The cooking appliance has a cooking space, and comprises:
a bottom heating module, used for heating a bottom part of the cooking space;
a top heating module, used for heating a top part of the cooking space;
a temperature detection module; and
a control module, configured to control the cooking appliance to execute the control method;
the control method comprising the following steps:
(a) controlling the bottom heating module to heat a bottom part of the cooking space, and at the same time, starting to record a timed duration T timed;
(b) when the timed duration T timed reaches a first predetermined duration T 1, controlling the top heating module to heat a top part of the cooking space, and maintaining the temperature of the top part of the cooking space at a predetermined top temperature Q;
(c) when the timed duration T timed reaches a second predetermined duration T 2, controlling the bottom heating module and the top heating module to stop heating.
According to the control method of the invention, a top heating module and a bottom heating module for heating the cooking space are provided in the cooking appliance. When performing a cooking function, a food material is heated by the bottom heating module from the bottom part of the cooking space; and after a predetermined duration of time, the top heating module is activated, the food material is heated by the top heating module from the top part of the cooking space, with the top part of the cooking space maintained at a predetermined temperature. It is noted that the term “maintained at a predetermined top temperature Q” should be understood as comprising the cases in which the temperature of the top part of the cooking space is maintained nearby the predetermined temperature Q, for example maintained in the range of Q±5℃, or preferably in the range of Q±2℃. For instance, the top part of the cooking space maintained at or nearby the predetermined top temperature Q by repeated activation and deactivation of the top heating module. In addition, during the time when the top heating module has not yet been activated for heating, water inside the food material can be evacuated from the top part by heating, so as to prevent the inside of the food material from being too moist. Also, the method allows to prevent the food material from being under-baked in the bottom part but over-baked in the top part. Thus, the food material in the cooking space can be heated by the combination of the top heating module and the bottom heating module, which allows the food material in the cooking space to be uniformly heated, so as to improve the quality and taste of the food material and to enhance a user’s experience.
Preferably, the control method further comprises a preheating step executed before the step (a) : controlling the bottom heating module to heat the bottom part of the cooking space at an initial power P 0, so that the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0 and is maintained for a predetermined heating duration T 0. Thus, by executing the preheating step before the step (a) , the food material in the cooking space can be fermented, thereby improving the taste of the food and the cooking result.
Preferably, the initial power P 0 satisfies 30%P rated≤P 0≤50%P rated, wherein P rated is the rated power of the cooking appliance.
Thus, by heating the bottom part of the food material at a relatively low power, the heating effect of the food material can be improved, thereby ensuring the cooking quality and taste of the food material.
Preferably, the initial bottom temperature B 0 satisfies: 20℃≤B 0≤35℃; the predetermined heating duration T 0 satisfies: 20 minutes ≤T 0≤100 minutes.
In this temperature range and duration range, the initial heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, the predetermined top temperature Q satisfies: 120℃≤Q≤250℃.
In this temperature range, the initial heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, the step (a) comprises:
a first cooking phase: controlling the bottom heating module to heat the bottom part of the cooking space at a first power P 1 that is for example higher than the initial power P 0, so that the temperature of the bottom part of the cooking space reaches a first predetermined bottom temperature B 1.
Thus, at the first cooking phase, the food material can be heated by gradually rising the temperature, improving the heating effect of the food material and ensuring the cooking quality and taste of the food material.
Preferably, the first power P 1 satisfies: 80%P rated≤P 1≤100%P rated, wherein P rated is the rated power of the cooking appliance.
In this power range, the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, the first predetermined bottom temperature B 1 satisfies: 70℃≤B 1≤100℃.
In this temperature range, the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, after the first cooking phase, step (a) further comprises:
a second cooking phase: controlling the bottom heating module to heat the bottom part of the cooking space at a second power P 2 that is lower than the first power P 1, so that the temperature of the bottom part of the cooking space reaches a second predetermined bottom temperature B 2.
Thus, at the second cooking phase, the food material can be further heated, thereby improving the heating effect of the food material and ensuring the cooking quality and taste of the food material.
Preferably, the second power P 2 satisfies: 50%P rated≤P 2≤80%P rated, wherein P rated is the rated power of the cooking appliance.
In this power range, the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, the second predetermined bottom temperature B 2 satisfies: 100℃≤B 2≤120℃ and B 2-B 1≥10℃.
In this temperature range, the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, after the second cooking phase, step (a) further comprises:
a third cooking phase: controlling the bottom heating module to heat the bottom part of the cooking space at a third power P 3 that is lower than the second power P 2, so that the temperature of the bottom part of the cooking space reaches a third predetermined bottom temperature B 3.
Preferably, the third power P 3 satisfies: 20%P rated≤P 3≤50%P rated, wherein P rated is the rated power of the cooking appliance.
Thus, at the third cooking phase, the food material can be further heated, thereby improving the heating effect of the food material and ensuring the cooking quality and taste of the food material.
Preferably, the third predetermined bottom temperature B 3 satisfies: 120℃≤B 3≤150℃ and B 3-B 2≥10℃.
In this temperature range, the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
Preferably, the first predetermined duration T 1 satisfies: 10 minutes ≤T 1≤30 minutes.
In this duration range, the heating effect of the food material can be improved, ensuring the cooking quality and taste of the food material.
The cooking appliance according to the invention is provided with a top heating module and a bottom heating module for heating a cooking space. When performing a cooking function, the food material is heated by the bottom heating module from the bottom part of the cooking space; and after a predetermined duration of time has elapsed, the top heating module is activated, the food material is heated by the top heating module from the top part of the cooking space, with the top part of the cooking space maintained at a predetermined temperature. In addition, during the time when the top heating module has not yet been activated for heating, water inside the food material can be evacuated from the top part by heating, so as to prevent the inside of the food material from being too moist. Also, the method allows to prevent the food material from being under-baked in the bottom part but over-baked in the top part. Thus, the food material in the cooking space can be heated by the combination of the top heating module and the bottom heating module, which allows the food material in the cooking space to be uniformly heated, so as to improve the quality and taste of the food material and to enhance a user’s experience.
Description of the Drawings
The accompanying drawings of the invention are used to illustrate the invention and are part of the invention. Embodiments of the invention and their description are shown in the accompanying drawings to explain the principle of the invention.
In the accompanying drawings:
Figure 1 is a schematic flow chart of a control method for a cooking appliance according to an embodiment of the invention; and
Figure 2 is a detailed schematic flow chart of a control method for a cooking appliance according to an embodiment of the invention..
Detailed Description of the Invention
In the description below, many specific details are provided for a more thorough understanding of the invention. However, as is obvious to a person skilled in the art, embodiments of the invention can be implemented without the need of one or more details. In other examples, to avoid confusion with the embodiments of the invention, some technical features known in the art are not described.
It should be noted that, the terms used herein are only for describing specific  embodiments, without any intent to limit the illustrative embodiments of the invention. As used herein, unless otherwise specified elsewhere, the singular form is also intended to include the plural form. In addition, it should also be understood that, when the terms “comprise” and/or “include” are used in the specification, they specify that the said feature, whole, step, operation, element and/or assembly exists, without excluding the presence or addition of one or more other features, wholes, steps, operations, elements, assemblies, and/or combinations thereof.
Illustrative embodiments according to the invention will now be described in more detail in reference to the accompanying drawings. However, those illustrative embodiments can be implemented in various different forms, and should not be interpreted to be limited to the embodiments described here. It should be understood that those embodiments are provided to make the disclosure of the invention thorough and complete, and to fully convey the idea of the illustrative embodiments to an ordinary person skilled in the art. In the accompanying drawings, the same references are used to represent the same elements, and thus their description is omitted.
The cooking appliance provided by the invention can be a rice cooker, a baking machine, etc. In the present embodiment, the cooking appliance can comprise a pot body and a cover body. The pot body can has an inner pot receiving space of cylindrical shape or another shape. An inner pot can be freely placed into the inner pot receiving space or removed from the inner pot receiving space, so as to facilitate the cleaning of the inner pot. The inner port is generally made of a metal material, has a circular opening on an upper surface, and is used for containing a material to be heated, such as rice and soup. For example, the inner pot can comprise a revolved body formed by a pot wall and having an upper opening and an inner chamber. The volume of the inner pot is generally smaller than 6 L. For example, the volume of the inner pot can be 2 L or 4 L.
The cover body comprises a removable cover and an upper cover. The removable cover is removably connected to the upper cover. The cover body can be pivotably connected to the pot body via a pivotal axis and used for covering the pot body. When the cover body covers the pot body, a cooking space is formed between the removable cover and the inner pot.
The pot body can also comprise a top heating module and a bottom heating module used for heating the inner pot. The bottom heating module is at least partially provided below the cooking space (for example, it can be provided in the pot body) , so as to be used for heating a bottom part of the cooking space. The top heating module is at least partially provided above the cooking space (for example, it can be provided in the cover body) , so as to be used for heating a top part of the cooking space. As an example, the bottom  heating module can be a heating coil or a heating plate provided below the inner pot, and the top heating module can be a heating coil or a heating plate provided in the cover body.
In addition, the cooking appliance can also comprise a temperature detection module, for example, a top temperature detection module provided in the upper cover and/or a bottom temperature detection module provided below the inner pot receiving space. The bottom temperature detection module and the top temperature detection module can be thermistors. The bottom temperature detection module and the top temperature detection module are both connected to a control module of the cooking appliance, so as to send a signal of detected temperature to the control module after detecting the temperature of the inner pot, so that the control module can achieve a more precise control of the cooking process based on the temperature signal. When the inner pot is placed in the inner pot receiving space of the pot body, the bottom temperature detection module can detect the temperature of a bottom wall of the inner pot. For example, the bottom temperature detection module can be in direct or indirect contact with the bottom wall.
In addition, the pot body can also comprise a power board, and the pot body is further provided with a display board (also called “panel” ) . The power board can power the control module, the display board, etc.
It should be noted that, even though a part of the structure of the cooking appliance is illustratively described here, those illustrations are made only by way of example, and cannot limit the structure of the cooking appliance of the embodiments of the invention.
In the embodiments of the invention, the cooking appliance can comprise a control module. For example, the control module can be a micro processing unit (MCU) , or can be called a micro controller or a micro processor.
The control method used for a cooking appliance provided in the embodiments of the invention can be used for the above-described cooking appliance. Specifically, the control method can be used for a cooking appliance such as a baking machine so as to cook a food material such as a cake. Of course, in other embodiments, another similar food material can be cooked. Below, taking the cooking of a cake by a baking machine as an example, the control method is further described in reference to Figure 1 and Figure 2, wherein, the cooking of a cake can comprise a fermentation step and a baking step.
As shown in Figure 1 and Figure 2, the control method comprises:
controlling the bottom heating module to heat the bottom part of the cooking space at an initial power P 0, so that the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0, and is maintained for a predetermined heating duration  T 0.
As an example, this step corresponds to a fermentation step for cooking a cake. A user first places a food material such as dough in the cooking space, and then inputs a cooking function such as “cake cooking” into the cooking appliance. The cooking appliance thus starts to execute a preset cooking program (for example, executes a cooking program that starts to make a cake) . The control module of the cooking appliance immediately starts to count time, and at the same time activates the bottom heating module to heat the bottom part of the cooking space at the initial power P 0. Thus, the temperature of the food material at the bottom part of the cooking space starts to rise. When the temperature of the bottom part of the cooking space reaches the initial bottom temperature B 0, the temperature of the bottom part of the cooking space is maintained for the predetermined heating duration T 0.
As an example, the initial power P 0 can be selected from the range of being larger than 30%of a rated power P rated but smaller than 50%of the rated power P rated, wherein the rated power P rated is the rated power of the cooking appliance in normal operation. The food material is thus heated at a relatively low power at the initial phase of executing the cooking function. As an example, the predetermined heating duration T 0 is selected from the range of 20 minutes to 100 minutes. During this step, the initial bottom temperature B 0 is selected from the range of 20℃ to 35℃. Thus, the food material can be fermented, ensuring the cooking quality and taste of the food material.
After executing the fermentation step, a subsequent step is executed. The control method further comprises:
controlling the bottom heating module to heat the bottom part of the cooking space at a power higher than the initial power P 0; and at the same time, starting the record a timed duration T timed;
when the timed duration T timed reaches a first predetermined duration T 1, controlling the top heating module to heat a top part of the cooking appliance, and maintaining the temperature of the top part of the cooking space at a predetermined top temperature Q.
As an example, this step corresponds to a baking step for cooking a cake. It should be noted that, in this embodiment, since only the bottom part of the dough for making the cake is heated after the fermentation step, the top part is still relatively moist due to the presence of water content. The baking step is provided such that only after the bottom heating module has been heating for a predetermined duration (i.e., the first predetermined duration T 1) , is the top heating module controlled to start heating. Thus, the top part of the dough is baked after its water content has evaporated. Compared to  activating the top heating module and the bottom heating module at the same time, it can further ensure the cooking quality and taste of the food material and provides a better cooking effect.
Specifically, the first predetermined duration T 1 is selected from the range of 10 minutes to 30 minutes. This range is a preferred range obtained by the inventor after numerous tests. When the first predetermined duration T 1 is shorter than 10 minutes, the top part of the cake is baked for too long, the top part of the finished cake will have a dark color and is relatively hard. In addition, a hard crust of 5 to 10 cm thick will be produced, which results in a poor taste when a user eats it. Moreover, when the top part is baked for too long, the temperature difference between the bottom part and the top part of the cake is small. As a result, the water content in the cake cannot evaporate, and evaporation holes cannot be formed, causing the mid-and lower sections of the cake to be moist and hard, which is a poor cooking effect. On the other hand, when the first predetermined duration T 1 is longer than 30 minutes, the top part of the cake is not heated long enough, causing the top part to be light and white in color and fail to provide the caramelization and crispiness of baking, thus resulting in a poor taste. Preferably, the first predetermined duration T 1 is 25 minutes. At this duration, the top part of the finished cake is uniformly and appropriately colored, and has an appropriately crisp crust, a tender inner structure, an appropriate moisture, and an optimal taste. In addition, the predetermined top temperature Q is selected from the range of 120℃ to 250℃. Thus, the cooking quality and taste of the food material can be ensured.
Specifically, the baking step can comprise three phases so as to heat the food material in the cooking space in the manner of gradually raising its temperature. Of course, in another embodiment, the food material can be heated during one, two, four, or more phases.
As an example, in this embodiment, the baking step comprises a first cooking phase, a second cooking phase and a third cooking phase. During the first cooking phase, the bottom heating module is controlled to heat the bottom part of the cooking space at a first power P 1 that is higher than the initial power P 0, so that the temperature of the bottom part of the cooking space reaches a first predetermined bottom temperature B 1. In other words, during the first cooking phase, the temperature of the bottom part of the food material in the cooking space should be brought to the first predetermined bottom temperature B 1.
Specifically, the first power P 1 can be selected from the range of being higher than 80%of the rated power P rated but lower than 100%of the rated power P rated. The first predetermined bottom temperature B 1 can be selected from the range of 70℃ to 100℃.
When the temperature of the bottom part of the cooking space reaches the first  predetermined bottom temperature B 1, the second cooking phase begins. As an example, during the second cooking phase, the bottom heating module is controlled to heat the bottom part of the cooking space at a second power P 2 that is higher than the initial power P 0 but lower than the first power P 1, so that the temperature of the bottom part of the cooking space reaches a second predetermined bottom temperature B 2. Similarly, during the second cooking phase, the temperature of the bottom part of the food material in the cooking space should be brought to the second predetermined bottom temperature B 2.
Specifically, the second power P 2 can be selected from the range of being higher than 50%of the rated power P rated but lower than 80%of the rated power P rated. The second predetermined bottom temperature B 2 can be selected from the range of 100℃ to 120℃, with B 2-B 1≥10℃.
When the temperature of the bottom part of the cooking space reaches the second predetermined bottom temperature B 2, the third cooking phase begins. As an example, during the third cooking phase, the bottom heating module is controlled to heat the bottom part of the cooking space at a third power P 3 that is lower than the second power P 2, so that the temperature of the bottom part of the cooking space reaches a third predetermined bottom temperature B 3. Similarly, during the third cooking phase, the temperature of the bottom part of the food material in the cooking space should be brought to the third predetermined bottom temperature B 3.
Specifically, the third predetermined bottom temperature B 3 can be selected from the range of 120℃ to 150℃. In this embodiment, for example, the third power P 3 can be selected from the range of being higher than 20%of the rated power P rated but lower than 50%of the rated power P rated. The third predetermined bottom temperature B 3 can be selected from the range of 120℃ to 150℃, with B 3-B 2≥10℃.
Further, when the temperature of the bottom part of the cooking space reaches the third predetermined bottom temperature B 3, the bottom heating module and the top heating module can be controlled to stop, and it is determined whether the timed duration T timed in the baking step has reached a second predetermined duration T 2. If yes, then the cooking process can be stopped. If the timed duration T timed has not reached the second predetermined duration T 2, then return to the third cooking phase, wherein the bottom part of the cooking space is heated again at the third power P 3, so as to effectuate cycling, until the timed duration T timed reaches the second predetermined duration T 2. Specifically, the second predetermined duration T2 satisfies: 20 minutes≤T2≤100 minutes.
In addition, during the third cooking phase, if it is detected that the temperature of the bottom part of the cooking space has not reached the third predetermined bottom  temperature B 3, it can also check whether the timed duration T timed in the baking step has reached the second predetermined duration T 2. If yes, then cooking can be stopped. If the timed duration T timed has not reached the second predetermined duration T 2, then return to the third cooking phase to continue to heat the bottom part of the cooking space at the third power P 3, so as to effectuate cycling, until the timed duration T timed reaches the second predetermined duration T 2.
It can be understood that in the baking step, after the top heating module starts to heat the top part of the cooking space, the temperature of the top part of the cooking space can be maintained at or nearby the predetermined top temperature Q by repeated activation and deactivation of the top heating module. Thus, the temperature of the top part of the food material in the cooking space is kept in the desired range, so as to ensure the cooking quality and taste of the food material.
The processes described in all preferred embodiments above are merely examples. Unless a disadvantageous effect is created, various processing operations can be conducted in an order other than the order in the above processes. The order of the steps in the above processes can also be increased, combined, or deleted based on actual needs.
To facilitate understanding, a set of specific cooking parameters used in the cooking appliance will be described below to further describe the control method in the above-described embodiment according to the invention by way of a specific embodiment. In this embodiment, the rated power of the baking machine P rated = 1200W.
The cooking parameters of the cooking appliance in this embodiment are:
P 0=480W; P 1=1100W; P 2=600W; P 3=240W;
B 0=20℃; B 1=70℃; B 2=100℃; B 3=120℃;
T 0=80min; T 1=30min; T 2=80min;
Q=200℃.
In this embodiment, a user places the dough for cooking a cake into the cooking space, and then inputs the cooking function of “cake cooking” into the cooking appliance.
When the cooking appliance starts to execute the cooking function (i.e. enters the fermentation step) , the control module of the cooking appliance starts counting time, the bottom heating module starts to heat the bottom part of the cooking appliance at an initial  power P 0=480W, and the temperature of the bottom part of the cooking space starts to rise. When the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0=20℃, the temperature of the bottom part of the cooking space will no longer rise, and is maintained unchanged. At this moment, the control module of the cooking appliance continues to count time. When the timed duration T timed= T 0=80 minutes, the fermentation step is ended. It should be noted that, during the fermentation step, the top heating module is in a deactivated state.
After the fermentation step, the baking step begins. When the cooking appliance enters the baking step, the timed duration T timed is reset to zero, and restarts to count time.
During the baking step, when counting time, the cooking appliance determines whether the timed duration T timed has reached a first predetermined duration T 1. When the timed duration T timed=T 1=30 minutes, the top heating module of the cooking appliance starts to heat the top part of the cooking space. When the temperature of the top part of the cooking space is equal to a predetermined top temperature Q=200℃, the top heating module stops heating. Afterwards, a top temperature detection module of the cooking appliance continuously monitors the temperature of the top part of the cooking space. At the same time, the control module of the cooking appliance repeatedly activates or deactivates the top heating module so as to maintain the temperature of the top part of the cooking space at the top temperature Q=200℃.
During the baking step, for the bottom heating module, there can be a first cooking phase, a second cooking phase and a third cooking phase.
During the first cooking phase, the bottom heating module continues to heat the bottom part of the cooking space, at a first power P 1=1100W, and the temperature of the bottom part of the cooking space continues to rise until it reaches a first predetermined bottom temperature B 1=70℃. After that, the second cooking phase begins.
During the second cooking phase, the bottom heating module continues to heat the bottom part of the cooking space, at a second power P 2=600W, and the temperature of the bottom part of the cooking space continues to rise until it reaches a second predetermined bottom temperature B 2=100℃. After that, the third cooking phase begins
During the third cooking phase, the bottom heating module continues to heat the bottom part of the cooking space, at a third power P 3=240W, and the temperature of the bottom part of the cooking space continues to rise until it reaches a third predetermined bottom temperature B 3=120℃.
Afterwards, when the temperature of the bottom part of the cooking space has reached  the third predetermined bottom temperature B 3=120℃, the bottom heating module and the top heating module are deactivated at the same time, and it is determined whether the timed duration T timed has reached a second predetermined duration T 2. If T timed=T 2=80 minutes, then the cooking function is ended. Otherwise, it returns to the third cooking phase to continue to heat the bottom part of the cooking space. In addition, when the temperature of the bottom part of the cooking space has not reached the third predetermined bottom temperature B 3=120℃, it is also detected whether the timed duration T timed has reached the second predetermined duration T 2. If T timed=T 2=80 minutes, the cooking function is ended. Otherwise, it returns to the third cooking phase to continue to heat the bottom part of the cooking space
It can be seen that, by means of the control method in this embodiment, the top heating module and the bottom heating module in the cooking appliance can be controlled to cooperate to heat the heating space. In this embodiment, during the fermentation step, the food material in the cooking space can be brought to the initial bottom temperature B 0, and maintained for the predetermined heating duration T 0. Thus, a food material made of such as self-raising flour can be fully fermented. During the baking step, the bottom heating module can be used to heat the bottom part of the food material in several phases in the manner of gradually raising the temperature. At the same time, after a predetermined duration, the top part of the food material is heated by the top heating module, so that the temperature of the top part of the food material is maintained at the predetermined top temperature Q or within a certain range nearby Q. Thanks to the above-described control method, the food material in the cooking space can be uniformly heated, ensuring the cooking quality and taste of the food material.
Further, specific process parameters used in other embodiments of the control method according to the invention to bake different food materials such as a cake, bread, etc. are provided below as examples. In those examples, the rated power of the baking machine is P rated = 1200W.
A first set of parameter settings:
P 0=400W; P 1=950W; P 2=750W; P 3=350W;
B 0=22℃; B 1=75℃; B 2=105℃; B 3=125℃;
T 0=70min; T 1=25min; T 2=75min;
Q=150℃.
A second set of parameter settings:
P 0=360W; P 1=1000W; P 2=700W; P 3=300W;
B 0=30℃; B 1=80℃; B 2=110℃; B 3=130℃;
T 0=75min; T 1=20min; T 2=60min;
Q=120℃.
A third set of parameter settings:
P 0=500W; P 1=900W; P 2=800W; P 3=400W;
B 0=32℃; B 1=90℃; B 2=115℃; B 3=140℃;
T 0=50min; T 1=15min; T 2=50min;
Q=160℃.
Of course, in other embodiments, the rated power of the cooking appliance can take another value, and the operating parameters corresponding to it can also change with it and according to needs.
According to another aspect of the invention, it is further provided a cooking appliance as described in the above-described embodiments. Specifically, the cooking appliance comprises a bottom heating module, a top heating module, a temperature detection module, and a control module configured to control the cooking appliance to execute the control method in the above-described embodiments to perform cooking. As an example, the cooking appliance can be a baking machine.
While the invention has been described in reference to the above-described embodiments, it should be understood that the above-described embodiments are merely used for illustration and description, and not intended to limit the invention to the embodiments described. In addition, a person skilled in the art can understand that the invention is not limited to the above-described embodiments. More variants and modifications can be made based on the teachings of the invention. Those variants and modifications all fall within the protection scope claimed by the invention. The protection scope of the invention is defined by the appended claims and their equivalences.

Claims (15)

  1. A control method for a cooking appliance, characterized in that, the cooking appliance has a cooking space, and comprises:
    a bottom heating module, used for heating a bottom part of the cooking space;
    a top heating module, used for heating a top part of the cooking space; and
    a temperature detection module; and
    a control module, configured to control the cooking appliance to execute the control method;
    the control method comprising the following steps:
    (a) controlling the bottom heating module to heat a bottom part of the cooking space, and at the same time, starting to record a timed duration T timed;
    (b) when the timed duration T timed reaches a first predetermined duration T 1, controlling the top heating module to heat a top part of the cooking space, and maintaining the temperature of the top part of the cooking space at a predetermined top temperature Q;
    (c) when the timed duration T timed reaches a second predetermined duration T 2, controlling the bottom heating module and the top heating module to stop heating.
  2. The control method of claim 1, characterized in that, the control method further comprises a preheating step before the step (a) : controlling the bottom heating module to heat the bottom part of the cooking space at an initial power P 0, so that the temperature of the bottom part of the cooking space reaches an initial bottom temperature B 0 and is maintained for a predetermined heating duration T 0.
  3. The control method of claim 2, characterized in that, the initial power P 0 satisfies 30%P rated≤P 0≤50%P rated, wherein P rated is the rated power of the cooking appliance.
  4. The control method of claim 2, characterized in that, the initial bottom temperature B 0 satisfies: 20℃≤B 0≤35℃; and the predetermined heating duration T 0 satisfies: 20 minutes ≤T 0≤100 minutes.
  5. The control method of claim 1, characterized in that, the predetermined top temperature Q satisfies: 120℃≤Q≤250℃.
  6. The control method of claim 1 or claim 2, characterized in that, the step (a) comprises:
    a first cooking phase: controlling the bottom heating module to heat the bottom part of the cooking space at a first power P 1 so that the temperature of the bottom part of the cooking space reaches a first predetermined bottom temperature B 1.
  7. The control method of claim 6, characterized in that, the first power P 1 satisfies: 80%P rated≤P 1≤100%P rated, wherein P rated is the rated power of the cooking appliance.
  8. The control method of claim 6, characterized in that, the first predetermined bottom temperature B 1 satisfies: 70℃≤B 1≤100℃.
  9. The control method of claim 6, characterized in that, after the first cooking phase, step (a) further comprises:
    a second cooking phase: controlling the bottom heating module to heat the bottom part of the cooking space at a second power P 2 that is lower than the first power P 1, so that the temperature of the bottom part of the cooking space reaches a second predetermined bottom temperature B 2.
  10. The control method of claim 9, characterized in that, the second power P 2 satisfies: 50%P rated≤P2≤80%P rated, wherein P rated is the rated power of the cooking appliance.
  11. The control method of claim 9, characterized in that, the second predetermined bottom temperature B 2 satisfies: 100℃≤B 2≤120℃ and B 2-B 1≥10℃.
  12. The control method of claim 9, characterized in that, after the second cooking phase, step (a) further comprises:
    a third cooking phase: controlling the bottom heating module to heat the bottom part of the cooking space at a third power P 3 that is lower than the second power P 2, so that the temperature of the bottom part of the cooking space reaches a third predetermined bottom temperature B 3.
  13. The control method of claim 12, characterized in that, the third power P 3 satisfies: 20%P rated≤P 3≤50%P rated, wherein P rated is the rated power of the cooking appliance.
  14. The control method of claim 12, characterized in that, the third predetermined bottom temperature B 3 satisfies: 120℃≤B 3≤150℃ and B 3-B 2≥10℃.
  15. The control method of claim 1, characterized in that, the first predetermined duration T 1 satisfies: 10 minutes ≤T 1≤30 minutes.
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