CN107348832B - Electric cooker based on minimum cooking amount and heating control method thereof - Google Patents
Electric cooker based on minimum cooking amount and heating control method thereof Download PDFInfo
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- CN107348832B CN107348832B CN201710594096.2A CN201710594096A CN107348832B CN 107348832 B CN107348832 B CN 107348832B CN 201710594096 A CN201710594096 A CN 201710594096A CN 107348832 B CN107348832 B CN 107348832B
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- rice
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
Abstract
According to the electric cooker based on the minimum cooking amount and the heating control method, the electric cooker comprises a cooker body, an inner cooker arranged in the cooker body and a cooker cover used for covering the inner cooker, wherein a weighing sensor is arranged at the lower part of the inner cooker and used for detecting the mass of rice and water in the inner cooker and transmitting a mass signal to a controller. A heater which heats the inner pot; and the controller receives the quality signal sent by the quality sensor and outputs a control signal to control the power and the heating time of the heater. The control method is based on the electric cooker, the controller controls the heater to heat the inner pot, and the electric cooker cooks rice and is divided into a water absorption stage, a heating stage, a boiling stage with water, a boiling stage without water and a stewing stage.
Description
Technical Field
The invention belongs to the technical field of electric cookers, and particularly relates to an electric cooker and a heating control method thereof.
Background
Early rice cookers typically cooked rice in only two stages, "cook" and "keep warm," each using a fixed power, wherein the duration of the "cook" stage is set and the duration of the "keep warm" stage is actually selected according to the needs of the user. In order to improve the taste of the rice, the improved electric rice cooker divides the rice cooking stage into five sub-stages in detail: the heating power of the five sub-stages is different, wherein the heating stage is an important stage, the heating time determines the time for the water in the pot to reach the boiling point and also determines the temperature of the following stages, if the heating time is not enough, the required temperature cannot be reached, the rice is half-cooked, and if the heating time is too long, the situation of 'drying the pot' with too high temperature is caused.
The existing electric rice cooker mostly adopts a temperature control method, namely, water in a cooker is automatically switched to the next stage after being heated to 100 ℃ by fixed power, but the heating time of the temperature control is insufficient, firstly, the detected temperature is the temperature of a metal layer of an inner cooker, secondly, the detected temperature is the temperature of steam in the cooker, and the first detection mode is that the measured temperature of the inner cooker is higher than the temperature of water in the inner cooker because the heat conductivity of metal is higher than that of water; the temperature detected by the second detection mode is the temperature of steam in the pot, and because the steam is liquefied and released on the surface of the temperature sensor, the temperature of the steam detected by the sensor is usually higher than the temperature of water in the actual pot, so that the rice cooker can switch the cooking stage too early, and the cooking time is insufficient and the temperature is low; secondly, the heating method does not consider the factors of the amount of the rice, for example, the time for the steam at the upper layer to reach 100 ℃ can be almost the same when 500g of the rice and 200g of the rice are put in the heating process, so the time for the rice cooker to actually heat can be the same, but the temperature of each part of the 500g of the rice and the 200g of the rice are different in the same heating time, because the heating of the rice needs a process of transferring heat from the periphery of the rice pile to the center of the rice pile, if the amount of the rice is put, the time heating time is not enough, the temperature inside and outside the whole rice is inconsistent, and the condition that the rice is pasted with a pot around the rice and the rice is half-cooked in the middle.
Disclosure of Invention
The invention provides an electric cooker which comprises a cooker body, an inner cooker arranged in the cooker body and a cooker cover used for covering the inner cooker, wherein a weighing sensor is arranged at the lower part of the inner cooker and used for detecting the mass of rice and water in the inner cooker and transmitting a mass signal to a controller. A heater which heats the inner pot; and the controller receives the quality signal sent by the quality sensor and outputs a control signal to control the power and the heating time of the heater.
The invention provides a heating control method of an electric cooker, which is based on the electric cooker, wherein a controller controls a heater to heat an inner pot, and the electric cooker cooks rice and is divided into a water absorption stage, a heating stage, a boiling stage with water, a boiling stage without water and a stewing stage, wherein the heating stage comprises the following steps:
step 1: detecting and obtaining the minimum cooking quantity m of the electric cooker0Heating time period T0I.e. the base heating time;
step 2: the controller determines the cooking amount m through a mass signal transmitted by a weighing sensor at the lower part of the inner pot;
and step 3: the controller is used for controlling the cooking quantity m and the minimum cooking quantity m0And a base heating time period T0Calculating the heating time T of the heating stage;
and 4, step 4: the controller sends a control signal to the heater to heat the inner pot at constant power, and the heating time is T.
Wherein the heating time length T of the heating stage is as follows:
wherein K is the heating coefficient, m is the cooking amount, i.e. the sum of the mass of the rice and the water in the inner pot in actual use, m0The minimum cooking quantity of the electric cooker is the sum of the minimum quantity of rice which can be cooked by the electric cooker of the type and the water matched with the rice, T0On the basis of the length of heating, i.e. the mass of rice and water in the inner pot is equal to m0In this case, the heater heats the rice-water mixture to 100 ℃ for a heating time period. m is calculated from the mass signal transmitted by the weighing sensor to the controller.
According to the electric cooker based on the minimum cooking amount and the heating control method, the defects that the temperature measurement of the conventional electric cooker is inaccurate, and the heating time cannot be adjusted according to the actual cooking amount are effectively overcome, the uniformity and the accuracy of the temperature of the rice when different cooking amounts are heated are guaranteed, and the taste of the rice is improved.
Drawings
FIG. 1 is a flow of rice cooking with an electric rice cooker in the prior art;
fig. 2 shows a heating control flow of the rice cooker in the heating stage according to the present application.
Detailed Description
The invention is further illustrated below with reference to several examples.
In one embodiment, the electric cooker comprises a cooker body, an inner cooker arranged in the cooker body and a cooker cover used for covering the inner cooker, wherein a weighing sensor is arranged at the lower part of the inner cooker and used for detecting the mass of rice and water in the inner cooker and transmitting a mass signal to a controller. Heater, its inner potHeating is carried out; and the controller receives the quality signal sent by the quality sensor and outputs a control signal to control the power and the heating time of the heater. Wherein the process of cooking rice by the electric cooker comprises a water absorption stage, a heating stage, a boiling stage with water, a boiling stage without water and a stewing stage, and in the heating stage, the controller is used for controlling the cooking amount m and the minimum cooking amount m0And a base heating time period T0And calculating the heating time T of the heating stage.
In a preferred embodiment, the controller sends a control signal to the heater so that the heater heats the inner pot at a constant power.
In one embodiment, the present invention provides a heating control method of an electric rice cooker, the control method is based on the electric rice cooker in the above embodiments, the process of cooking rice by the electric rice cooker is divided into a water absorption stage, a heating stage, a boiling stage with water, a boiling stage without water and a stewing stage, wherein the control method of the heating stage comprises the following steps:
step 1: detecting and obtaining the minimum cooking quantity m of the electric cooker0Heating time period T0I.e. the base heating time;
step 2: the controller determines the cooking amount m through a mass signal transmitted by a weighing sensor at the lower part of the inner pot;
and step 3: the controller is used for controlling the cooking quantity m and the minimum cooking quantity m0And a base heating time period T0Calculating the heating time T of the heating stage;
and 4, step 4: the controller sends a control signal to the heater to heat the inner pot at constant power, and the heating time is T.
Specifically, the minimum cooking volume of the electric cooker is determined by the quality of rice and water which can be cooked by the electric cooker of the type at one time, generally, the minimum cooking volume is in positive correlation with the volume and the diameter of the inner pot and is basically in direct proportion to the square of the radius of the inner pot, and the minimum cooking volume is determined by the self-guidance of a manufacturer. The ratio of rice and water is determined by the user, for example, if the rice is soft and tasty a little, the ratio of water is higher, and if the rice is hard, the ratio of rice is higher. Minimum cooking quantity m for different proportions0Of rice-water mixture of base heating duration T0The difference is negligible and in the preferred embodiment the ratio of rice to water is 1: 1.
T0The rice cooker is obtained by testing of a rice cooker manufacturer, namely, the heater heats rice with the minimum cooking amount in the inner pot to the time length of 100 ℃. In the testing process, the heater adopts temperature feedback control, the temperature signal output by the temperature sensor is output to the controller, and the controller controls the heater according to the temperature signal. The temperature sensor is arranged at the inner bottom of the inner pot of the electric cooker, and in the test method, because the problem that the rice is polluted by the temperature sensor is not needed, the temperature sensor is in direct contact with the rice-water mixture, so that the real temperature of the rice-water mixture is measured, and the temperature sensor cannot be in direct contact with the rice when the electric cooker is used by an actual user.
Obtaining the base heating time0Said T is0And m0Is stored in a storage unit of the controller. In the process of actually cooking rice by a user, the rice-water mixture is put into the inner pot, the weighing sensor arranged below the inner pot sends the obtained mass signal to the controller, and the controller determines the actual cooking amount m according to the mass variation before and after the rice-water mixture is put into the controller.
The controller firstly controls the heater to heat the inner pot at low power, the inner pot enters a water absorption stage, and in the heating stage, the controller obtains the heating time according to the following formula:
k is the heating coefficient, m is the cooking amount, namely the sum of the mass of the rice and the water in the inner pot in actual use, m0The minimum cooking quantity of the electric cooker is the sum of the minimum quantity of rice which can be cooked by the electric cooker of the type and the water matched with the rice, T0On the basis of the length of heating, i.e. the mass of rice and water in the pot is equal to m0The length of heating time. m is calculated from the mass signal transmitted by the weighing sensor to the controller. The heating coefficient K is equal toThe electric rice cooker has the advantages that the heating power, the diameter of the inner cooker, the maximum cooking amount, the heat transfer coefficient of the inner cooker material and the like in the heating stage are related, the K values of the electric rice cookers of different manufacturers and models are different, and the K values can be obtained through the test of the experimental method, for example, the maximum cooking amount m is put into the inner cookermaxThe temperature sensor is arranged at the central position of the rice-water mixture, and the heating time length T obtained by testingmaxSubstituting the formula can inversely calculate K.
The arrangement of the temperature sensor, the controller, the heater and the weighing sensor, and the signal processing and controlling method are all the prior art, and are not described herein again.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can conceive of changes or substitutions within the technical scope of the present invention.
Claims (1)
1. A heating control method of an electric cooker comprises a cooker body, an inner cooker arranged in the cooker body and a cooker cover used for covering the inner cooker, wherein a weighing sensor is arranged at the lower part of the inner cooker and used for detecting the mass of rice and water in the inner cooker and transmitting a mass signal to a controller; a heater which heats the inner pot; the controller controls the heater to heat the inner pot and is divided into a water absorption stage, a heating stage, a boiling stage with water, a boiling stage without water and a stewing stage, the controller receives a mass signal sent by the weighing sensor and outputs a control signal to control the power and the heating time of the heater, and the controller controls the heater to heat the inner pot according to the minimum cooking quantity m of the electric cooker0The heater will make the minimum cooking amount m0Basic heating time T when heating to 100 DEG C0And the controller calculates the heating time length T of the heating stage according to the cooking amount m obtained by the quality signal, and is characterized in that the control method of the heating stage comprises the following steps:
step 1: detecting and obtaining the minimum cooking quantity m of the electric cooker0While heatingLong T0I.e. the base heating time; the T is0The heater heats rice with the minimum cooking amount in the inner pot to the duration of 100 ℃, in the testing process, the heater adopts temperature feedback control, temperature signals output by the temperature sensor are output to the controller, the controller controls the heater according to the temperature signals, the temperature sensor is arranged at the inner bottom of the inner pot of the electric rice cooker, and the temperature sensor is directly contacted with the rice-water mixture;
step 2: the controller determines the cooking amount m through a mass signal transmitted by a weighing sensor at the lower part of the inner pot; in the process of actually cooking rice by a user, putting the rice-water mixture into the inner pot, sending an obtained mass signal to the controller by the weighing sensor arranged below the inner pot, and determining the actual cooking amount m by the controller according to the mass variation before and after the rice-water mixture is put into the controller;
and step 3: the controller is used for controlling the cooking quantity m and the minimum cooking quantity m0And a base heating time period T0Calculating the heating time T of the heating stage;
k is the heating coefficient, m is the cooking amount, namely the sum of the mass of the rice and the water in the inner pot in actual use, m0The minimum cooking quantity of the electric cooker is the sum of the qualities of the rice which can be cooked by the electric cooker at least and the water matched with the rice, T0On the basis of the length of heating, i.e. the mass of rice and water in the pot is equal to m0The heating time duration m is calculated by a mass signal transmitted to the controller by the weighing sensor, the rice-water mixture with the maximum cooking quantity mmax is put into the inner pot, the temperature sensor is arranged at the center of the rice-water mixture, the heating time duration Tmax is obtained by testing, and the heating time duration Tmax is substituted into the formula to reversely calculate K;
and 4, step 4: the controller sends a control signal to the heater to heat the inner pot at constant power, and the heating time is T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594096.2A CN107348832B (en) | 2017-07-20 | 2017-07-20 | Electric cooker based on minimum cooking amount and heating control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710594096.2A CN107348832B (en) | 2017-07-20 | 2017-07-20 | Electric cooker based on minimum cooking amount and heating control method thereof |
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| CN107348832A CN107348832A (en) | 2017-11-17 |
| CN107348832B true CN107348832B (en) | 2020-03-20 |
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| CN107348832A (en) | 2017-11-17 |
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Effective date of registration: 20200422 Address after: 528427 3rd floor, No.23, fengshuo Road, Nantou Town, Zhongshan City, Guangdong Province Patentee after: Zhongshan Jingti Electronic Technology Co., Ltd Address before: Zhejiang province Yiwu City Chouzhou road 322000 Lane 230, No. 11 unit 1, Room 401 Patentee before: Wu Liankai |
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