CN110941919A - Method for calculating surface temperature of fried object in cooking utensil in cooking process - Google Patents
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- CN110941919A CN110941919A CN201911416465.4A CN201911416465A CN110941919A CN 110941919 A CN110941919 A CN 110941919A CN 201911416465 A CN201911416465 A CN 201911416465A CN 110941919 A CN110941919 A CN 110941919A
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- 238000010411 cooking Methods 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- 239000000843 powder Substances 0.000 claims abstract description 77
- 230000017525 heat dissipation Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
A method for calculating the surface temperature of the frying material in a cooking utensil in a cooking process, wherein the current surface temperature of the frying material in the current heating period is T in the cooking processFrying in oilHaving a value of TFrying in oil=(WAt present‑QCurrent frying powder)/(COil+CImplement)+TPre-fryingWherein W isAt presentFor the current work provided to the cooking appliance during the current heating cycle, WAt present=PAt present*ZAt present,WAt presentThe unit of (a) is J; pAt presentIs the current power, P, in the current heating cycleAt presentIs determined by the input end or the selection end of the cooking appliance; zAt presentFor cooking time of the current heating cycle, ZAt presentDefaulting to 1 second, and calculating by taking each 1 second as a heating period; qCurrent frying powderIn the current heating cycleInternal current frying heat dissipation, QCurrent frying powder=QCurrent heat loss+QOil powder. The invention has the characteristic of accurate temperature control.
Description
Technical Field
The invention relates to a method for calculating the surface temperature of fried objects in a cooking utensil in a cooking process.
Background
Chinese patent document No. CN 105852617a discloses a method and a device for controlling a cooking appliance in 2016, 08, 17 th month, wherein the method for controlling the cooking appliance includes: detecting a water temperature in the cooking appliance when a cooking instruction is received; determining heating parameters of the cooking appliance when the cooking appliance enters a heating and temperature-rising stage according to the corresponding relation between the water temperature and the heating parameters, or calculating the heating parameters of the cooking appliance when the cooking appliance enters the heating and temperature-rising stage according to a calculation formula of the heating parameters and the water temperature in the cooking appliance; controlling the cooking appliance to heat according to the determined heating parameters of the cooking appliance when the cooking appliance enters a heating and temperature-rising stage so as to control the cooking appliance to enter the heating and temperature-rising stage. The method for detecting the water temperature in the cooking utensil is not accurate enough and needs to be improved.
Disclosure of Invention
The invention aims to provide a method for calculating the surface temperature of fried objects in a cooking utensil in a cooking process with accurate temperature control, so as to overcome the defects in the prior art.
A method for calculating the surface temperature of the frying material in a cooking appliance during a cooking process is characterized in that the current surface temperature of the frying material in the current heating cycle is T during the cooking processFrying in oilHaving a value of TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
Wherein the content of the first and second substances,
Wat presentFor the current work provided to the cooking appliance during the current heating cycle,
Wat present=PAt present*ZAt present,WAt presentThe unit of (a) is J;
Pat presentIs the current power, P, in the current heating cycleAt presentIs determined by the input end or the selection end of the cooking appliance;
Zat presentFor cooking in the current heating cycleTime of cooking, ZAt presentDefaulting to 1 second, and calculating by taking each 1 second as a heating period;
Qcurrent frying powderFor the current frying heat dissipation during the current heating cycle, QCurrent frying powderThe unit of (a) is J,
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat lossFor heat loss from the heat source of the cooking appliance during the current heating cycle, QCurrent heat lossThe unit of (a) is J,
Qcurrent heat loss=PHeat loss*ZAt present,PHeat lossA preset constant for the cooking appliance, usually provided by the manufacturer of the cooking appliance; pHeat lossThe unit of (a) is J/sec;
wherein, TPre-fryingT of the last heating period before the current heating periodFrying in oil(ii) a When the calculation is from the beginning of the first heating cycle, TPre-fryingFor the initial temperature T of the cooking appliance obtained by the sensor of the cooking appliance0,TPre-fryingAnd T0The units of (a) are respectively;
Qoil powderFor heat removal from oil during the current heating cycle, QOil powderThe unit of (a) is J,
Qoil powder=NSurface oil powder*TPre-frying*ZAt present,
NSurface oil powderIs the heat dissipation coefficient of surface oil, and N is obtained when the temperature of the sensor is 0-220 DEG CSurface oil powderThe value range of (A) is 0.1-20J/(° C second);
CoilIn order to be the heat capacity of the oil,
Coil=BOil*MOil,COilIn J/DEG C;
BoilIs the specific heat capacity of the oil, BOil1.8-2.4J/(g DEG C);
MoilIs the mass of the oil, MOilUnit of (d) is g;
calculating the mass M of oil put into the cooking utensil through a pressure sensor arranged on the cooking utensil and a central controllerOilOr, according to the user, the oil which is measured in advance is put into the cooking utensil, so as to obtain the mass M of the oilOil;
CImplementIn order to be the thermal capacity of the cooking appliance,
Cimplement=BImplement*MImplement,CImplementIn J/DEG C;
BimplementSpecific heat capacity of cooking utensil, BImplementThe unit of (c) is J/(g ℃); b isImplementThe preset constant for the cooking appliance, usually provided by the manufacturer of the cooking appliance,
MimplementMass of cooking utensil, MImplementThe unit is g; mImplementTypically provided by the manufacturer of the cooking appliance.
Further, the cooking process is a gas heating cooking process, an electromagnetic heating cooking process, a light wave heating cooking process or a microwave heating cooking process.
On the premise that the temperature measurement of the temperature sensor in the current cooking process is not accurate enough, the invention can obtain more accurate data by adopting the technical scheme, and lays a solid foundation for realizing the cooking automation.
The invention is not only suitable for the cooking process of gas heating, but also suitable for the cooking process of electromagnetic heating, the cooking process of light wave heating or the cooking process of microwave heating, and has wide application range.
Detailed Description
The present invention will be further described with reference to the following examples.
First embodiment
The method for calculating the surface temperature of the fried object in the cooking utensil in the cooking process is characterized in that the current surface temperature of the fried object in the current heating period is T in the cooking processFrying in oilHaving a value of TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
Wherein the content of the first and second substances,
Wat presentFor the current work provided to the cooking appliance during the current heating cycle,
Wat present=PAt present*ZAt present,WAt presentThe unit of (a) is J;
Pat presentIs the current power, P, in the current heating cycleAt presentIs determined by the input end or the selection end of the cooking appliance;
Zat presentFor cooking time of the current heating cycle, ZAt presentDefaulting to 1 second, and calculating by taking each 1 second as a heating period;
Qcurrent frying powderFor the current frying heat dissipation during the current heating cycle, QCurrent frying powderThe unit of (a) is J,
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat lossFor heat loss from the heat source of the cooking appliance during the current heating cycle, QCurrent heat lossThe unit of (a) is J,
Qcurrent heat loss=PHeat loss*ZAt present,PHeat lossA preset constant for the cooking appliance, usually provided by the manufacturer of the cooking appliance; pHeat lossThe unit of (a) is J/sec;
wherein, TPre-fryingT of the last heating period before the current heating periodFrying in oil(ii) a When the calculation is from the beginning of the first heating cycle, TPre-fryingFor the initial temperature T of the cooking appliance obtained by the sensor of the cooking appliance0,TPre-fryingAnd T0The units of (a) are respectively;
Qoil powderFor heat removal from oil during the current heating cycle, QOil powderThe unit of (a) is J,
Qoil powder=NSurface oil powder*TPre-frying*ZAt present,
NSurface oil powderIs the heat dissipation coefficient of surface oil, and N is obtained when the temperature of the sensor is 0-220 DEG CSurface oil powderThe value range of (A) is 0.1-20J/(° C second);
CoilIn order to be the heat capacity of the oil,
Coil=BOil*MOil,COilIn J/DEG C;
BoilIs the specific heat capacity of the oil, BOil1.8-2.4J/(g DEG C);
MoilIs the mass of the oil, MOilUnit of (d) is g;
calculating the mass M of oil put into the cooking utensil through a pressure sensor arranged on the cooking utensil and a central controllerOilOr, according to the user, the oil which is measured in advance is put into the cooking utensil, so as to obtain the mass M of the oilOil;
CImplementIn order to be the thermal capacity of the cooking appliance,
Cimplement=BImplement*MImplement,CImplementIn J/DEG C;
BimplementSpecific heat capacity of cooking utensil, BImplementThe unit of (c) is J/(g ℃); b isImplementThe preset constant for the cooking appliance, usually provided by the manufacturer of the cooking appliance,
MimplementMass of cooking utensil, MImplementThe unit is g; mImplementTypically provided by the manufacturer of the cooking appliance.
In this embodiment, cooking is started, in this case, the first heating cycle, and the initial temperature T of the cooking appliance obtained by the sensor of the cooking appliance0Is 20 ℃ and is thus T0=TPre-frying=20℃。
Current power P of cooking utensilAt present5000J/s, the current power P is the loss rate of the cooking utensilAt present40% of the total amount of heat lost by the cooking appliance, the rate of loss of the cooking appliance being provided by the manufacturer of the cooking appliance, so that the heat loss P of the heat source of the cooking appliance isHeat loss5000J/sec 0.4 2000J/sec,
heat dissipation coefficient N of oil in cooking utensil at 20 DEG CSurface oil powder0.16J/(. degree. C.),
mass M of oil in a cooking applianceOilThe weight of the mixture is 500g,
mass M of cooking utensilImplementThe weight of the mixture is 1000g,
specific heat capacity B of cooking utensilImplementIs 0.6J/(g ℃ C.),
specific heat capacity B of oil in cooking utensil at 20 DEG COilIs 1.82J/(g ℃ C.)
Now the first second after the cooking appliance has been operated, the temperature of the surface of the fry in the cooking appliance is calculated.
TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
WAt present=PAt present*ZAt present5000J/sec 1 sec 5000J;
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat loss=PHeat loss*ZAt present2000J/sec 1 sec 2000J;
Qoil powder=NSurface oil powder*TPre-frying*ZAt present0.16J/(° c sec) 1 sec 20 ℃3.2J;
Qcurrent frying powder=2000J+3.2J=2003.2J;
WAt present-QCurrent frying powder=5000J-2003.2J=2996.8J;
COil=BOil*MOil=1.82J/(g℃)*500g=910J/℃;
CImplement=BImplement*MImplement=0.6J/(g℃)*1000g=600J/℃;
COil+CImplement=910J/℃+600J/℃=1510J/℃;
TFrying in oil=2996.8J/1510J/℃+20℃=1.9846℃+20℃=21.9846℃。
Second embodiment
Then, after the cooking utensil works for the second, the surface temperature of the fried object in the cooking utensil is obtained, the condition setting is continuously carried out, the second heating period is the second heating period, the first heating period exists before, and the T obtained after the first heating period is usedFrying in oilIs assigned to TPre-fryingThen, T isPre-fryingThe temperature was 21.9846 ℃.
Current power P of cooking utensilAt present5000J/s, heat loss P of heat source of cooking utensilHeat loss5000J/s 0.4-2000J/s, heat dissipation coefficient N of oil in cooking utensil at 21.9846 ℃Surface oil powder0.161J/(. degree.C.),
mass M of oil in a cooking applianceOilThe weight of the mixture is 500g,
mass M of cooking utensilImplementThe weight of the mixture is 1000g,
specific heat capacity B of cooking utensilImplementIs 0.6J/(g ℃ C.),
specific heat capacity B of oil in cooking utensil at 20 DEG COilIs 1.83J/(g ℃ C.)
Now the second after the cooking appliance has been operated, the temperature of the surface of the fry in the cooking appliance is calculated.
TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
WAt present=PAt present*ZAt present5000J/sec 1 sec 5000J;
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat loss=PHeat loss*ZAt present2000J/sec 1 sec 2000J;
Qoil powder=NSurface oil powder*TPre-frying*ZAt present0.161J/(° c sec) 1 sec 21.9846 ℃ 3.5395J;
Qcurrent frying powder=2000J+3.5395J=2003.5395J;
WAt present-QCurrent frying powder=5000J-2003.5395J=2996.4605J;
COil=BOil*MOil=1.83J/(g℃)*500g=915J/℃;
CImplement=BImplement*MImplement=0.6J/(g℃)*1000g=600J/℃;
COil+CImplement=915J/℃+600J/℃=1510J/℃;
TFrying in oil=2996.4605J/1510J/℃+21.9846℃=1.9844℃+21.9846℃=23.969℃。
The rest of the parts which are not described in the first embodiment are not described in detail.
Third embodiment
Then, after the cooking utensil works for the third second, the surface temperature of the fried object in the cooking utensil is obtained, the condition setting is continuously carried out, the third heating period is the third heating period, the first heating period and the second heating period exist before, and the T obtained after the second heating period is usedFrying in oilIs assigned to TPre-fryingThen, T isPre-fryingThe temperature was 23.969 ℃.
Current power P of cooking utensilAt present5000J/s, heat loss P of heat source of cooking utensilHeat loss5000J/s 0.4-2000J/s, 23.969 ℃, heat dissipation factor N of oil in cooking utensilSurface oil powder0.165J/(. degree. C.),
mass M of oil in a cooking applianceOilThe weight of the mixture is 500g,
mass M of cooking utensilImplementThe weight of the mixture is 1000g,
specific heat capacity B of cooking utensilImplementIs 0.6J/(g ℃ C.),
specific heat capacity B of oil in cooking utensil at 26.659 DEG COilIs 1.85J/(g ℃ C.)
Now the calculation of the surface temperature of the fries in the cooking appliance after the third second of operation of the cooking appliance has started.
TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
WAt present=PAt present*ZAt present5000J/sec 1 sec 5000J;
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat loss=PHeat loss*ZAt present2000J/sec 1 sec 2000J;
Qoil powder=NSurface oil powder*TPre-frying*ZAt present0.165J/(° c sec) 1 sec 23.969 ℃ 3.9549J;
Qcurrent frying powder=2000J+3.9549J=2003.9549J;
WAt present-QCurrent frying powder=5000J-2003.9549J=2996.0451J;
COil=BOil*MOil=1.85J/(g℃)*500g=925J/℃;
CImplement=BImplement*MImplement=0.6J/(g℃)*1000g=600J/℃;
COil+CImplement=925J/℃+600J/℃=1525J/℃;
TFrying in oil=2996.0451J/1525J/℃+23.9689℃=1.9646℃+23.9689℃=25.9335℃。
The rest of the parts which are not described in the first embodiment are not described in detail.
Fourth embodiment
Then, after the fourth second of the cooking utensil working, the surface temperature of the fried object in the cooking utensil is obtained, the above condition setting is continued, then the fourth heating period is the time, the first heating period, the second heating period and the third heating period exist before, and the T obtained after the third heating period is used for heating the fried objectFrying in oilIs assigned to TPre-fryingThen, T isPre-fryingThe temperature was 25.9335 ℃.
Current power P of cooking utensilAt present5000J/s, heat loss P of heat source of cooking utensilHeat loss5000J/sec 0.4-2000J/sec, 25.9335, oil in cooking utensilHeat dissipation coefficient NSurface oil powder0.169J/(° c sec),
mass M of oil in a cooking applianceOilThe weight of the mixture is 500g,
mass M of cooking utensilImplementThe weight of the mixture is 1000g,
specific heat capacity B of cooking utensilImplementIs 0.6J/(g ℃ C.),
specific heat capacity B of oil in cooking utensil at 29.9874 DEG COilIs 1.88J/(g ℃ C.)
Now the fourth second of operation of the cooking appliance is started, the surface temperature of the fries in the cooking appliance.
TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
WAt present=PAt present*ZAt present5000J/sec 1 sec 5000J;
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat loss=PHeat loss*ZAt present2000J/sec 1 sec 2000J;
Qoil powder=NSurface oil powder*TPre-frying*ZAt present0.169J/(° c sec) 1 sec 25.9335 ℃ 4.3828J;
Qcurrent frying powder=2000J+4.3828J=2004.3828J;
WAt present-QCurrent frying powder=5000J-2004.3828J=2995.6172J;
COil=BOil*MOil=1.88J/(g℃)*500g=940J/℃;
CImplement=BImplement*MImplement=0.6J/(g℃)*1000g=600J/℃;
COil+CImplement=940J/℃+600J/℃=1540J/℃;
TFrying in oil=2995.6172J/1540J/℃+25.9335℃=1.9452℃+25.9335℃=27.8787℃。
The rest of the parts which are not described in the first embodiment are not described in detail.
Fifth embodiment
Then, after the cooking utensil works for the fifth second, the surface temperature of the fried objects in the cooking utensil is obtained, the condition setting is continued, the fourth heating period is adopted, the first heating period, the second heating period, the third heating period and the fourth heating period exist before, and the T obtained after the third heating period is usedFrying in oilIs assigned to TPre-fryingThen, T isPre-fryingThe temperature was 27.8787 ℃.
Current power P of cooking utensilAt present5000J/s, heat loss P of heat source of cooking utensilHeat loss5000J/s 0.4-2000J/s, 27.8787 ℃, heat dissipation factor N of oil in cooking utensilSurface oil powder0.171J/(. degree.C.),
mass M of oil in a cooking applianceOilThe weight of the mixture is 500g,
mass M of cooking utensilImplementThe weight of the mixture is 1000g,
specific heat capacity B of cooking utensilImplementIs 0.6J/(g ℃ C.),
specific heat capacity B of oil in cooking utensil at 33.3151 DEG COilIs 1.89J/(g ℃ C.)
Now the fifth second of operation of the cooking appliance is started, the surface temperature of the fries in the cooking appliance is calculated.
TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
WAt present=PAt present*ZAt present5000J/sec 1 sec 5000J;
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat loss=PHeat loss*ZAt present2000J/sec 1 sec 2000J;
Qoil powder=NSurface oil powder*TPre-frying*ZAt present0.171J/(° c sec) 1 sec 27.8787 ℃ 4.7673J;
Qcurrent frying powder=2000J+4.7673J=2004.7673J;
WAt present-QCurrent frying powder=5000J-2004.7673J=2995.2327J;
COil=BOil*MOil=1.89J/(g℃)*500g=945J/℃;
CImplement=BImplement*MImplement=0.6J/(g℃)*1000g=600J/℃;
COil+CImplement=945J/℃+600J/℃=1545J/℃
TFrying in oil=2995.2327J/1545J/℃+27.8787℃=1.9387℃+27.8787℃= 29.8174℃。
The rest of the parts which are not described in the first embodiment are not described in detail.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A method for calculating the surface temperature of the frying material in a cooking appliance during a cooking process, characterized in that
During the cooking process, the current surface temperature of the frying material in the current heating period is TFrying in oilHaving a value of TFrying in oil=(WAt present-QCurrent frying powder)/(COil+CImplement)+TPre-frying,
Wherein the content of the first and second substances,
Wat presentFor the current work provided to the cooking appliance during the current heating cycle,
Wat present=PAt present*ZAt present,WAt presentThe unit of (a) is J;
Pat presentIs the current power, P, in the current heating cycleAt presentIs determined by the input end or the selection end of the cooking appliance;
Zat presentFor cooking time of the current heating cycle, ZAt presentDefaulting to 1 second, and calculating by taking each 1 second as a heating period;
Qcurrent frying powderFor the current frying heat dissipation during the current heating cycle, QCurrent frying powderThe unit of (a) is J,
Qcurrent frying powder=QCurrent heat loss+QOil powder;
QCurrent heat lossFor heat loss from the heat source of the cooking appliance during the current heating cycle, QCurrent heat lossThe unit of (a) is J,
Qcurrent heat loss=PHeat loss*ZAt present,PHeat lossA preset constant for the cooking appliance, usually provided by the manufacturer of the cooking appliance; pHeat lossThe unit of (a) is J/sec;
wherein, TPre-fryingT of the last heating period before the current heating periodFrying in oil(ii) a When the calculation is from the beginning of the first heating cycle, TPre-fryingFor the initial temperature T of the cooking appliance obtained by the sensor of the cooking appliance0,TPre-fryingAnd T0The units of (a) are respectively;
Qoil powderFor heat removal from oil during the current heating cycle, QOil powderThe unit of (a) is J,
Qoil powder=NSurface oil powder*TPre-frying*ZAt present,
NSurface oil powderIs the heat dissipation coefficient of surface oil, and N is obtained when the temperature of the sensor is 0-220 DEG CSurface ofOil powderThe value range of (A) is 0.1-20J/(° C second);
CoilIn order to be the heat capacity of the oil,
Coil=BOil*MOil,COilIn J/DEG C;
BoilIs the specific heat capacity of the oil, BOil1.8-2.4J/(g DEG C);
MoilIs the mass of the oil, MOilUnit of (d) is g;
calculating the mass M of oil put into the cooking utensil through a pressure sensor arranged on the cooking utensil and a central controllerOilOr, according to the user, the oil which is measured in advance is put into the cooking utensil, so as to obtain the mass M of the oilOil;
CImplementIn order to be the thermal capacity of the cooking appliance,
Cimplement=BImplement*MImplement,CImplementIn J/DEG C;
BimplementSpecific heat capacity of cooking utensil, BImplementThe unit of (c) is J/(g ℃); b isImplementThe preset constant for the cooking appliance, usually provided by the manufacturer of the cooking appliance,
MimplementMass of cooking utensil, MImplementThe unit is g; mImplementTypically provided by the manufacturer of the cooking appliance.
2. The method of claim 1, wherein the cooking process is a gas-fired cooking process, an electromagnetic-heated cooking process, a light-wave-heated cooking process, or a microwave-heated cooking process.
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Citations (2)
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CN107477617A (en) * | 2017-07-07 | 2017-12-15 | 广州视源电子科技股份有限公司 | The determination methods and device of kitchen range anti-spill pot, control method and device and kitchen range |
CN107727205A (en) * | 2016-08-11 | 2018-02-23 | 佛山市顺德区美的电热电器制造有限公司 | Food quantity measuring method, food amount detecting device and cooking apparatus |
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CN107727205A (en) * | 2016-08-11 | 2018-02-23 | 佛山市顺德区美的电热电器制造有限公司 | Food quantity measuring method, food amount detecting device and cooking apparatus |
CN107477617A (en) * | 2017-07-07 | 2017-12-15 | 广州视源电子科技股份有限公司 | The determination methods and device of kitchen range anti-spill pot, control method and device and kitchen range |
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