CN112155408A - Cooking appliance and control method - Google Patents

Cooking appliance and control method Download PDF

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Publication number
CN112155408A
CN112155408A CN202011013287.3A CN202011013287A CN112155408A CN 112155408 A CN112155408 A CN 112155408A CN 202011013287 A CN202011013287 A CN 202011013287A CN 112155408 A CN112155408 A CN 112155408A
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China
Prior art keywords
liquid level
heating
inner pot
controller
height
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CN202011013287.3A
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Chinese (zh)
Inventor
肖麟
孔进喜
朱方莉
王江南
文雅
梅江
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202011013287.3A priority Critical patent/CN112155408A/en
Publication of CN112155408A publication Critical patent/CN112155408A/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/004Cooking-vessels with integral electrical heating means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/24Warming devices
    • A47J36/2483Warming devices with electrical heating means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/32Time-controlled igniting mechanisms or alarm devices

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

The invention discloses a cooking utensil which comprises a shell, wherein an inner pot is arranged in the shell, a heating plate is arranged below the inner pot, a plurality of groups of heating coils are arranged on the side wall of the inner pot, the plurality of groups of heating coils are electrically connected with a controller, the controller is electrically connected with a liquid level sensor, the liquid level sensor is used for detecting the liquid level height of the inner pot, and the heating coils are started to enable the difference value between the heating height of the heating coils and the liquid level height of the inner pot to be smaller than a set threshold value. Also discloses a control method of the cooking utensil, the inner pot is filled with a certain amount of water; the controller obtains the liquid level height of the inner pot, and controls the difference value between the heating height of the heating coil and the liquid level height of the inner pot to be smaller than a set threshold value. The invention provides a control method of a cooking utensil, which controls the correlation between the heating height of a coil and the water surface in the cooking process of rice, effectively improves the uniformity of the water content of the rice and reduces the water content deviation ratio of the rice.

Description

Cooking appliance and control method
Technical Field
The invention belongs to the technical field of household appliances, and particularly relates to a cooking appliance and a control method.
Background
Along with the intelligent development of electric appliances, the electric cooker is more and more intelligent in use, and automatic cooking control is mostly carried out in stages. The cooking control program of the electric cooker generally comprises a rice soaking/water absorbing stage, a heating stage, a boiling stage and the like. The water absorption stage is to soak rice to make rice fully absorb water, the temperature rise stage is to heat soaked rice and water to boiling, the boiling stage can be divided into a first boiling stage containing free water when entering the boiling stage and a second boiling stage without free water, and the rice stewing stage is carried out after the boiling stage is finished. If the quality of cooked rice is poor, the cooked rice may be "dry on the upper surface and wet on the lower surface", or may have an uneven quality. An important parameter for measuring the cooking quality of the rice is the water uniformity of the rice, which represents the water distribution condition of the rice, and the better the water uniformity is, the better the rice quality is. The heating mode of the rice cooker is that the surface of the inner cooker generates heat through electromagnetic coil induction heating, the area and the size of the generated heat are closely related to the winding mode of the coil, and the prior art does not provide a control method for improving the uniformity of the water content of the rice through the relationship between the coil and the water adding amount.
Disclosure of Invention
The invention aims to provide a cooking appliance and a control method, which solve the technical problem of uneven water content of rice in the cooking process mentioned in the background technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a cooking utensil, includes the casing, is provided with interior pot in the casing, is provided with many groups heating coil on the lateral wall of interior pot, and multiunit heating coil electricity is connected with the controller, and the controller electricity is connected with level sensor, and level sensor is used for detecting the liquid level height of interior pot, opens heating coil and makes the difference value of the heating height of heating coil and the liquid level height of interior pot be less than the settlement threshold value.
Further, the liquid level sensor is a pressure sensor, the pressure sensor is arranged on the side wall of the inner pot, scales are arranged on the pressure sensor, and the pressure sensor detects the change of the pressure value to acquire the liquid level height of the inner pot.
Further, the bottom of the inner pot is provided with a weight sensor for detecting the weight of the rice put into the inner pot.
Furthermore, a plurality of groups of heating coils are vertically distributed on the side wall of the inner pot, and the controller respectively controls each group of heating coils to heat respectively.
Furthermore, a first R angle coil and a second R angle coil are arranged at the included angle between the bottom surface and the side wall of the inner pot, the first R angle coil and the second R angle coil are arranged below the multiple groups of heating coils, and the first R angle coil and the second R angle coil are electrically connected with the controller.
Further, interior pot below is provided with the heating plate, and the heating plate is connected with the controller electricity, and the controller obtains heating coil work back and opens the heating plate heating simultaneously.
A control method of a cooking appliance is characterized in that a plurality of groups of heating coils are arranged on the side wall of an inner pot, and the control method of the cooking appliance comprises the following steps:
a certain amount of water is injected into the inner pot;
the controller obtains the liquid level height of the inner pot, and controls the difference value between the heating height of the heating coil and the liquid level height of the inner pot to be smaller than a set threshold value.
Further, the threshold value is set to be the height of at least one group of heating coils opposite to and/or adjacent to the liquid level height of the inner pot.
Further, the gravity sensor acquires the weight of the rice added into the inner pot, the rated liquid level height and the rated heating time are calculated according to the weight of the added rice, and if the actual liquid level height detected by the liquid level sensor is larger than the rated liquid level height, the controller prolongs the rated heating time; and if the actual liquid level height detected by the liquid level sensor is less than the rated liquid level height, the controller reduces the rated heating time.
Further, the liquid level height of the inner pot is obtained in a rice soaking stage or a temperature rising stage of cooking.
The cooking utensil and the control method provided by the invention have the following advantages:
according to the control method of the cooking utensil, the water uniformity is optimal when the height of the coil is consistent with or close to the liquid level height through experiments, the correlation degree of the heating height of the coil and the water level in the rice cooking process is controlled, the water uniformity of rice is effectively improved, and the water deviation ratio of the rice is reduced.
Drawings
FIG. 1 is a schematic diagram of a moisture uniformity testing method;
FIG. 2 is a schematic diagram of the distribution structure of inner pot coils;
fig. 3 is a flowchart of a control method of a cooking appliance.
The reference numbers in the figures illustrate: 1. heating the plate; 2. a first R-angle coil; 3. a second R-angle coil; 4. and a heating coil.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The invention provides a cooking utensil which comprises a shell, wherein an inner pot is arranged in the shell, a heating plate 1 is arranged below the inner pot, a plurality of groups of heating coils 4 are arranged on the side wall of the inner pot, the plurality of groups of heating coils 4 are electrically connected with a controller, the controller is electrically connected with a liquid level sensor, the liquid level sensor is used for detecting the liquid level height of the inner pot, and the controller receives a liquid level height signal and controls at least one group of heating coils 4 opposite to the liquid level height to work, so that the heat of the inner pot is uniformly distributed.
When the pot heats in the controller control, heating plate 1 below the pot bottom heats including setting up, and the controller is controlling the relative 4 work of at least a set of heating coil of liquid level height to heat distribution in the pot is more even in making, and the moisture of the rice of cooking out is more even. The embodiment provides cooking rice in an inner pot, a proper amount of rice needs to be added into the inner pot, a certain amount of water is injected into the inner pot, only water rice cooking is taken as an example for illustration, other cereal food materials can be cooked, different liquids are injected, the injection is not limited to water, no specific limitation is made, and different food materials are added according to personal preferences for cooking.
The liquid level sensor is a pressure type sensor, the pressure type sensor is arranged on the side wall of the inner pot, scales are arranged on the pressure type sensor, and the pressure type sensor detects the change of a pressure value to acquire the liquid level height of the inner pot.
The pressure type sensor is one of liquid level sensor, and the liquid level height of pot in the sensor can detect, and pressure type sensor sets up on the lateral wall of pot in, and pressure type sensor sends the controller according to the pressure signal of the liquid level of pot in and is used for detecting liquid level height.
The invention also provides another embodiment, the bottom of the inner pot is provided with a weight sensor for detecting the weight of the rice put into the inner pot. The weight of the rice in the inner pot is identified through the gravity sensor, the height of water required to be added by the weight of the corresponding rice is calculated according to the weight of the identified rice, and a user adds water with the same height according to the prompt. The method for recognizing the rice quantity is not limited to a gravity sensor but also can be other sensors, the time required for heating to the specified temperature is obtained by comparing the temperature difference before and after heating for a period of time, and the like, and the time for acquiring the height of the liquid level is just before the water is boiled.
The multiple groups of heating coils 4 are vertically distributed on the side wall of the inner pot, and the controller respectively controls each group of heating coils 4 to heat respectively. The first R-angle coil 2 and the second R-angle coil 3 are arranged at the included angle between the bottom surface and the side wall of the inner pot, the first R-angle coil 2 and the second R-angle coil 3 are arranged below the multiple groups of heating coils 4, and the first R-angle coil 2 and the second R-angle coil 3 are electrically connected with the controller. When the liquid level of the inner pot is arranged below the multiple groups of heating coils 4, the controller controls the first R-angle coil 2 and/or the second R-angle coil 3 corresponding to the liquid level to heat through the liquid level detected by the liquid level sensor.
The uniformity of the moisture of the rice is only related to the heating coil on the bottom surface and the heating coil with the height similar to the liquid level.
The heating coil is controlled by a plurality of insulated gate bipolar transistors, the insulated gate bipolar transistors are composite fully-controlled voltage-driven power semiconductor devices consisting of BJTs (bipolar junction transistors) and MOS (insulated gate field effect transistors), and have the advantages of both high input impedance of the MOSFETs and low conduction voltage drop of GTRs. The GTR saturation voltage is reduced, the current carrying density is high, but the driving current is large; the MOSFET has small driving power, high switching speed, large conduction voltage drop and small current carrying density. The IGBT integrates the advantages of the two devices, and has small driving power and reduced saturation voltage.
The invention provides a control method of a cooking appliance, the cooking appliance can be an appliance which can realize cooking functions in a heating mode, such as an electric cooker, an electric pressure cooker, an electric steamer and the like, and the cooking appliance at least comprises a cooking cavity for cooking food materials and a heating device for heating the cooking cavity. The control method comprises the following steps:
s1: a certain amount of water is injected into the inner pot;
specifically, before the water boils in the cooking stage, the liquid level height of the inner pot is obtained in the rice soaking stage or the temperature rising stage of the cooking.
S2: the liquid level sensor detects the liquid level height of the inner pot, the controller obtains the liquid level height of the inner pot, and the difference value between the heating height of the control coil and the liquid level height of the inner pot is smaller than a set threshold value.
The set threshold value is the height of at least one group of heating coils opposite to and/or adjacent to the liquid level height of the inner pot, and specifically comprises the following steps: and after the controller acquires the liquid level signal, the heating coil opposite to the liquid level height signal or the heating coil adjacent to the heating coil is controlled to heat.
The multiple groups of heating coils 4 are vertically distributed on the side wall of the inner pot, the vertical height of each group of heating coils relative to the bottom surface of the inner pot is recorded in the controller, and the controller respectively controls each group of heating coils to heat respectively. When the liquid level sensor detects that the liquid level of the inner pot is positioned at the junction of the two adjacent heating coils, the controller controls the two adjacent heating coils 4 to heat.
To prove that the heating height of the heating coil 4 is consistent with the height of rice water in the pot, the water uniformity is the minimum, the following experiment is carried out, 5 cups of rice are added in the pot, water is added to the corresponding water gauge height, meanwhile, the heating is carried out by using the same rice cooker and the same heating curve, only different coil heights are changed, and the uniformity of the final rice is tested. The specific experimental data are as follows:
Figure BDA0002698213860000051
Figure BDA0002698213860000061
the experimental result shows that when the height of the coil is close to the height of the rice water, the extremely poor water content and the standard deviation can both reach the minimum, so that the rice effect is the most uniform when the height of the coil is consistent with the height of the rice water.
As shown in FIG. 1, according to the structural schematic diagram of nine-point water sampling of rice, the following specific experiment was performed, wherein a clean aluminum box was placed in a drying oven at 101-105 ℃ to be dried to a constant weight, and the mass m3 was recorded. Taking nine points of rice 1-2 cm away from the edge of the pot quickly according to the positions shown in figure 1, wherein each position is weighed as 3-8g of rice. Immediately after sampling, the sample was capped and precisely weighed as m 1. The aluminum box was placed in a drying oven at 101-105 deg.C and dried to constant weight, and the mass m2 was recorded. Calculating the moisture content of the cooked rice according to a formula of (m1-m2)/(m1-m3) X100, wherein X is the moisture content of the cooked rice and has a unit of percentage (%); m1 is the mass of the aluminum box and sample in grams (g); m2 is the mass of the aluminum box and sample after drying, in grams (g); m3 is the mass of the aluminum box in grams (g). According to the formula
Figure RE-GDA0002736562810000062
And calculating the water deviation of the rice. S is the standard deviation of moisture; x is the water content of the rice, and the unit is percentage (%); and N is the number of samples.
Specific experimental data are shown in the following table:
Figure BDA0002698213860000062
Figure BDA0002698213860000071
Figure BDA0002698213860000081
and after calculating the moisture content of the nine points by adopting a standard deviation calculation method through the final calculation method of the experimental data, measuring the standard deviation of the moisture content of the nine points, wherein if the standard deviation is smaller, the more uniform the overall moisture distribution is, and the better the moisture uniformity is.
The liquid level height of the inner pot is obtained and specifically comprises: the gravity sensor acquires the weight of the rice added into the inner pot, and the rated liquid level height is calculated according to the weight of the added rice. The gravity sensor acquires the weight of the rice added into the inner pot, the rated liquid level height and the rated heating time are calculated according to the weight of the added rice, and if the actual liquid level height detected by the liquid level sensor is larger than the rated liquid level height, the controller prolongs the rated heating time; and if the actual liquid level height detected by the liquid level sensor is less than the rated liquid level height, the controller reduces the rated heating time.
The nominal level height refers to the height of the water to be added corresponding to the amount of rice to be cooked, and as disclosed in the prior art generally, we simply state here that we need approximately 150ml of water per cup of rice based on a 150ml measuring cup, that is, the ratio of rice to water is 1: 1.5. If 5 cups of rice are needed for cooking, it is generally appropriate to pour 6 cups of water.
If the amount of water poured into the cooker is too much or too little in the actual using process, the length of the heating time is controlled by the controller, and if the actual liquid level height detected by the liquid level sensor is greater than the rated liquid level height, the controller prolongs the heating time; if the actual liquid level height detected by the liquid level sensor is less than the nominal liquid level height, the controller decreases the heating time.
The control method provided by the invention mainly controls the coil heating area through different liquid level heights or different rice quantities, adjusts the coil heating height to be consistent with or similar to the rice water level height, effectively improves the rice water uniformity and reduces the rice water deviation ratio. The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing on the protection scope of the present invention.

Claims (10)

1. The utility model provides a cooking utensil, includes the casing, is provided with interior pot in the casing, its characterized in that is provided with multiunit heating coil (4) on the lateral wall of interior pot, and multiunit heating coil (4) electricity is connected with the controller, and the controller electricity is connected with level sensor, and the interior pot liquid level height that level sensor detected is acquireed to the controller, opens heating coil (4) and makes the difference value of the heating height of heating coil (4) and the liquid level height of interior pot be less than the settlement threshold value.
2. The cooking appliance according to claim 1, wherein the liquid level sensor is a pressure sensor, the pressure sensor is disposed on the sidewall of the inner pot, the pressure sensor is provided with a scale, and the pressure sensor detects the change of the pressure value to obtain the liquid level of the inner pot.
3. The cooking appliance according to claim 2, wherein a weight sensor is arranged at the bottom of the inner pot, the controller is electrically connected with the weight sensor, the weight sensor is used for detecting the weight of rice put into the inner pot, and the controller calculates the rated liquid level height according to the weight of the added rice.
4. The cooking appliance according to claim 1, wherein a plurality of groups of heating coils (4) are vertically distributed on the side wall of the inner pan, the vertical height of each group of heating coils (4) relative to the bottom surface of the inner pan is recorded in a controller, and the controller controls each group of heating coils (4) to heat respectively.
5. The cooking appliance according to claim 4, wherein a first R-angle coil (2) and a second R-angle coil (3) are arranged at corners of the bottom surface and the side wall of the inner pan, the first R-angle coil (2) and the second R-angle coil (3) are arranged below the plurality of groups of heating coils (4), and the first R-angle coil (2) and the second R-angle coil (3) are electrically connected with the controller.
6. The cooking appliance according to claim 1, wherein the heating plate (1) is arranged below the inner pot, the heating plate (1) is electrically connected with the controller, and the controller obtains that the heating plate (1) is started to heat after the heating coil (4) works.
7. A control method of a cooking appliance is characterized in that a plurality of groups of heating coils (4) are arranged on the side wall of an inner pot, and the control method of the cooking appliance comprises the following steps:
a certain amount of water is injected into the inner pot;
the controller obtains the liquid level height of the inner pot, and controls the difference value between the heating height of the heating coil (4) and the liquid level height of the inner pot to be smaller than a set threshold value.
8. Method for controlling a cooking appliance according to claim 7, characterized in that the threshold value is set to the height of at least one group of heating coils (4) opposite and/or adjacent to the height of the inner pot level.
9. The method for controlling a cooking utensil of claim 7, wherein the gravity sensor obtains the weight of the rice added to the inner pot, the rated liquid level height and the rated heating time are calculated according to the weight of the added rice, and if the actual liquid level height detected by the liquid level sensor is greater than the rated liquid level height, the controller prolongs the rated heating time; and if the actual liquid level height detected by the liquid level sensor is less than the rated liquid level height, the controller reduces the rated heating time.
10. The method for controlling a cooking appliance according to claim 7, wherein the liquid level of the inner pot is obtained in a rice soaking stage or a warming stage of cooking.
CN202011013287.3A 2020-09-24 2020-09-24 Cooking appliance and control method Pending CN112155408A (en)

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Application Number Priority Date Filing Date Title
CN202011013287.3A CN112155408A (en) 2020-09-24 2020-09-24 Cooking appliance and control method

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Application Number Priority Date Filing Date Title
CN202011013287.3A CN112155408A (en) 2020-09-24 2020-09-24 Cooking appliance and control method

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Publication Number Publication Date
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108618606A (en) * 2017-03-21 2018-10-09 佛山市顺德区美的电热电器制造有限公司 Insulating pot
CN108771485A (en) * 2018-06-19 2018-11-09 宁波万泓科技有限公司 A kind of intelligent heating kitchen tools and control method
CN110856616A (en) * 2018-08-24 2020-03-03 佛山市顺德区美的电热电器制造有限公司 Cooking appliance and cooking control method thereof
CN211408575U (en) * 2019-11-15 2020-09-04 浙江玛莉莎工贸有限公司 Novel liquid heat conduction pot

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108618606A (en) * 2017-03-21 2018-10-09 佛山市顺德区美的电热电器制造有限公司 Insulating pot
CN108771485A (en) * 2018-06-19 2018-11-09 宁波万泓科技有限公司 A kind of intelligent heating kitchen tools and control method
CN110856616A (en) * 2018-08-24 2020-03-03 佛山市顺德区美的电热电器制造有限公司 Cooking appliance and cooking control method thereof
CN211408575U (en) * 2019-11-15 2020-09-04 浙江玛莉莎工贸有限公司 Novel liquid heat conduction pot

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