CN107224191A - The electric cooker and its thermal-insulation control method of a kind of automatic heat preserving - Google Patents
The electric cooker and its thermal-insulation control method of a kind of automatic heat preserving Download PDFInfo
- Publication number
- CN107224191A CN107224191A CN201710594039.4A CN201710594039A CN107224191A CN 107224191 A CN107224191 A CN 107224191A CN 201710594039 A CN201710594039 A CN 201710594039A CN 107224191 A CN107224191 A CN 107224191A
- Authority
- CN
- China
- Prior art keywords
- temperature
- pot
- stage
- controller
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009413 insulation Methods 0.000 title claims description 11
- 241000209094 Oryza Species 0.000 claims abstract description 46
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 46
- 235000009566 rice Nutrition 0.000 claims abstract description 46
- 238000009835 boiling Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000010411 cooking Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 18
- 235000012054 meals Nutrition 0.000 description 2
- 229910001229 Pot metal Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
- A47J27/004—Cooking-vessels with integral electrical heating means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
Abstract
The present invention proposes a kind of electric cooker, and it includes pot, the interior pot in the pot and the pot cover for covering the interior pot；Heater, its internal pot is heated；Controller, the quality signal that quality of reception sensor is sent, the power and heating duration of output control signal control heater.The electric cooker also has the first temperature sensor and second temperature sensor, first temperature sensor is located at pot cover inner surface, temperature for measuring steam in interior pot, the second temperature sensor is located at interior pot, for detecting interior pot temperature, three-temperature sensor is located on the outside of pot, for detecting pot surface temperature.The present invention proposes a kind of electric rice cooker heated control method, it is based on above-mentioned electric cooker, the controller control internal pot of heater is heated so that the electric rice cooker is divided into water suction stage, heating period, has boiling water stage, anhydrous boiling stage and cook rice over a slow fire the stage.
Description
Technical field
The invention belongs to electric cooker technical field, more particularly to a kind of electric cooker and its method for heating and controlling.
Background technology
The electric cooker of early stage generally only has two stages in cooking rice, i.e., " cook " and " insulation ", each stage
Rice is cooked using fixed power, wherein the duration in " cooking " stage is setting, the duration of " insulation " is basis
User needs to carry out actual selection.In order to improve the mouthfeel of rice, improved electric cooker " will cook " stage and be divided into five in detail
Individual sub-stage：I.e. water suction stage, heating period, have boiling water stage, anhydrous boiling stage and cook rice over a slow fire the stage, this five sub-stages
Heating power it is different, wherein anhydrous boiling stage to the stage of cooking rice over a slow fire be an important ring because in anhydrous boiling stage, rice
The moisture of meal is evaporated substantially, and the power of heater must be lowered into the stage of cooking rice over a slow fire, if heating power remain in that compared with
High heating power, it is easy to the situation for causing rice to be burned.
Current electric cooker uses temperature controlled method mostly, i.e., the water in pot is heated into 100 with fixed power
It is automatic after DEG C to switch to next stage, but it is not enough with some during temperature control heating, and it is interior that the temperature detected first, which wants first,
The temperature of pot metal level, second is that the temperature of detection is the temperature of steam in pot, and the first detection mode is due to the heat conduction of metal
Property be higher than water, therefore the interior pot temperature measured is higher than the temperature of interior pot reclaimed water；And second of detection mode is because steam is in temperature
The reason for spending sensor surface liquidation exothermic reaction, temperature of the temperature usually above rice in actual pot of the steam of sensor detection,
Therefore this control method has hysteresis quality, and also inaccurate.The existing electric cooker in part uses the side switched the set time
Formula, this method is also unreasonable, because the rice quantity of boiling is different every time, set time switching may cause rice
The situation that dry and wet differs.3rd, prior art electric cooker is added using different when being switched to from anhydrous boiling stage and cook rice over a slow fire the stage
The mode that thermal power instantaneously switches, because cooking for rice is a process gradually changed, therefore when rice is more, instantaneously
The mode of switching may cause rice moisture excessive.
The content of the invention
The present invention proposes a kind of electric cooker, and it includes pot, the interior pot in the pot and described for covering
The pot cover of interior pot；Heater, its internal pot is heated；Controller, the quality signal that quality of reception sensor is sent, output control
The power and heating duration of signal control heater processed.Also there is the electric cooker the first temperature sensor and second temperature to sense
Device, first temperature sensor is located at pot cover inner surface, the temperature for measuring steam in interior pot, the second temperature sensing
Device is located at interior pot, and for detecting interior pot temperature, three-temperature sensor is located on the outside of pot, for detecting pot surface temperature.
The present invention proposes a kind of electric rice cooker heated control method, and it is based on above-mentioned electric cooker, the controller control heating
The internal pot of device is heated so that the electric rice cooker is divided into water suction stage, heating period, has the boiling water stage, without boiling water
Stage and cook rice over a slow fire the stage, comprise the following steps wherein being switched to the stage of cooking rice over a slow fire from anhydrous boiling stage：
Step 1：Controller controls the heating power of the internal pot of heater to be p, in anhydrous boiling stage, p=p1, the first temperature
Spend vapor (steam) temperature in sensor detection pot and produce the first temperature signal, and first temperature signal is sent to controller, control
Device obtains the first temperature t of steam in pot according to first temperature signal1；
Step 2：Pot temperature produces second temperature signal in second temperature sensor detection, and the second temperature signal is sent out
Controller is given, controller obtains the second temperature t of interior pot temperature according to the second temperature signal2；
Step 3：Three-temperature sensor detection pot surface temperature produces the 3rd temperature signal, and the 3rd temperature is believed
Number controller is sent to, controller obtains the 3rd temperature t of pot surface temperature according to the 3rd temperature signal2；
Step 4：Controller is according to the first temperature t1, second temperature t2Calculate from anhydrous boiling stage and be switched to rank of cooking rice over a slow fire
The switching time T of section0；
Step 5：Controller controls the heating power of the internal pot of heater to be p, in the stage of cooking rice over a slow fire, p=pw+p2。
Wherein in step 4, t is worked as2-t1≥twWhen, that is, reach the switching time that anhydrous boiling stage is switched to the stage of cooking rice over a slow fire
T0, controller controls the heating power p of the heater from p=p1It is switched to p=pw+p2。
Wherein in step 5, controller calculates p according to below equation：
p2=KA (ts-t3)；
In above formula, P is the heating power of heater, and K is interior pot coefficient of heat transfer, and A is interior pot area of dissipation, PwFor switching
Power, p1For anhydrous boiling stage heating power, p2For insulation power, b is handoff factor, and a is attenuation coefficient, tsFor insulation temperature
Degree.
According to the electric cooker and thermal-insulation control method of automatic heat preserving proposed by the present invention, it effectively overcomes existing electric meal
The shortcoming that pot temperature measurement is inaccurate, the heat time can not accurately switch, and the power switched of Heat preservation is improved, lifted
The mouthfeel of rice.
Figure of description
Fig. 1 is the flow of electric cooker cooking rice in the prior art；
Fig. 2 is electric cooker thermal-insulation control method of the present invention.
Embodiment
The present invention is further described with reference to several embodiments.
In one embodiment, electric cooker of the invention includes：Pot, the interior pot in the pot and for covering
Close the pot cover of the interior pot；Heater, its internal pot is heated；Controller, the quality signal that quality of reception sensor is sent,
The power and heating duration of output control signal control heater.The electric cooker also has the first temperature sensor and the second temperature
Sensor is spent, first temperature sensor is located at pot cover inner surface, the temperature for measuring steam in interior pot, second temperature
Spend sensor and be located at interior pot, for detecting interior pot temperature, three-temperature sensor is located on the outside of pot, for detecting pot surface
Temperature.
Specifically, vapor (steam) temperature produces the first temperature signal in the first temperature sensor detection pot, and by first temperature
Signal is sent to controller, and controller obtains the first temperature t of steam in pot according to first temperature signal1；Second temperature is passed
Pot temperature produces second temperature signal in sensor detection, and the second temperature signal is sent into controller, and controller is according to this
Second temperature signal obtains the second temperature t of interior pot temperature2；Three-temperature sensor detection pot surface temperature produces the 3rd temperature
Signal is spent, and the 3rd temperature signal is sent to controller, controller obtains pot surface temperature according to the 3rd temperature signal
3rd temperature t of degree2。
Wherein, the process of the electric cooker cooking rice be divided into water suction stage, heating period, have the boiling water stage, it is anhydrous
Boiling stage and cook rice over a slow fire the stage, in a preferred embodiment, in anhydrous boiling stage, controller sends control signal to heater to be made
Heater is obtained to be heated with the internal pot of firm power.
In one embodiment, the present invention proposes a kind of method for heating and controlling of electric cooker, and the control method is based on upper
The electric cooker in embodiment is stated, the process of the electric cooker cooking rice is divided into water suction stage, heating period, has boiling water rank
Section, anhydrous boiling stage and cook rice over a slow fire the stage, comprise the following steps wherein being switched to the stage of cooking rice over a slow fire from anhydrous boiling stage：
Step 1：Controller controls the heating power of the internal pot of heater to be p, in anhydrous boiling stage, p=p1, the first temperature
Spend vapor (steam) temperature in sensor detection pot and produce the first temperature signal, and first temperature signal is sent to controller, control
Device obtains the first temperature t of steam in pot according to first temperature signal1；
Step 2：Pot temperature produces second temperature signal in second temperature sensor detection, and the second temperature signal is sent out
Controller is given, controller obtains the second temperature t of interior pot temperature according to the second temperature signal2；
Step 3：Three-temperature sensor detection pot surface temperature produces the 3rd temperature signal, and the 3rd temperature is believed
Number controller is sent to, controller obtains the 3rd temperature t of pot surface temperature according to the 3rd temperature signal2；
Step 4：Controller is according to the first temperature t1, second temperature t2Calculate from anhydrous boiling stage and be switched to rank of cooking rice over a slow fire
The switching time T of section0；
Step 5：Controller controls the heating power of the internal pot of heater to be p, in the stage of cooking rice over a slow fire, p=pw+p2。
Wherein in step 4, t is worked as2-t1≥twWhen, that is, reach the switching time that anhydrous boiling stage is switched to the stage of cooking rice over a slow fire
T0, controller controls the heating power p of the heater from p=p1It is switched to p=pw+p2。
Wherein in step 5, controller calculates p according to below equation：
p2=KA (ts-t3)；
In above formula, P is the heating power of heater, and K is interior pot coefficient of heat transfer, and A is interior pot area of dissipation, PwFor switching
Power, p1For anhydrous boiling stage heating power, p2For insulation power, b is handoff factor, and a is attenuation coefficient, tsFor insulation temperature
Degree, twFor switching threshold.
In a preferred embodiment, the ratio of rice and water is 1: 1.
In step 1, the heating power p of anhydrous boiling stage1It can set, can also be according to control of the prior art
Method is obtained.
In step 4, when being drawn to an end due to anhydrous boiling stage, the moisture of rice tails off in interior pot, therefore the water produced
Steam also begins to reduce, steam is due to the first temperature sensor surface liquidation exothermic reaction, the steam of sensor detection
Temperature usually above rice in actual pot temperature, when water vapour starts reduction, the detected by the first temperature sensor
One temperature t1It can reduce, simultaneously as heating power p1Constant, the moisture in interior pot, which is reduced, causes the temperature of interior pot also to raise,
The second temperature t that second temperature sensor is detected2It can increase.In order to increase the accuracy and sensitivity of detection, the present invention is adopted
With Difference Calculation, will in the temperature of pot and the temperature of steam do difference, as difference DELTA t=t2-t1Meet or exceed some threshold value
twWhen, judge that anhydrous boiling stage terminates, heater reduction heating power, which enters, cooks rice over a slow fire the stage.In practice, threshold value twIt can set
It is fixed, for example it is set as 5-10 DEG C；It can also be determined by the Δ t values of previous stage, for example, be set as 0.9 of Δ t values before 1 minute
Times.
In the formula of step 5, tsDuring actual representative is cooked rice over a slow fire, user wishes the temperature that rice is kept, can basis
Actual demand is set, for example, be set as 60-80 DEG C.And K value is determined by the material of interior pot, A is interior pot area of dissipation, itself and pot
The height of body, diameter are related, therefore, P2Being can be by the 3rd temperature t2Calculate.
As time variable T=T0When, p1=b+p2, at this moment can reverse go out b value.A value is embodied when from without boiling water rank
Section initiates a switch to the speed that heating power declines when cooking rice over a slow fire the stage, and this can be set by actual conditions.By p1＞ p2, switching system
Number b and attenuation coefficient a is all higher than zero, it is preferable that attenuation coefficient a is more than or equal to 1.
The controller includes there be the tables of data corresponding to the temperature signal in memory cell, the memory cell
Lattice, controller obtains first and second temperature value by lookup table mode.The temperature sensor, controller, heater
Set and signal transacting, control method are prior art, will not be repeated here.
The preferred embodiments of the disclosure is these are only, but protection scope of the present invention is not limited thereto, it is any
Those familiar with the art the invention discloses technical scope in, it is contemplated that change or replacement should all cover this
Within the protection domain of invention.
Claims (3)
1. a kind of electric cooker, it includes pot, the interior pot in the pot and the pot cover for covering the interior pot；Plus
Hot device, its internal pot is heated；Controller, the quality signal that quality of reception sensor is sent, output control signal control adds
The power and heating duration of hot device.The electric cooker also has the first temperature sensor and second temperature sensor, described first
Temperature sensor is located at pot cover inner surface, and the temperature for measuring steam in interior pot, the second temperature sensor is located at interior pot,
For detecting interior pot temperature, three-temperature sensor is located on the outside of pot, for detecting pot surface temperature.
2. electric cooker as claimed in claim 1, it is characterised in that the controller control internal pot of heater is heated,
It is divided into water suction stage, heating period, has boiling water stage, anhydrous boiling stage and cook rice over a slow fire the stage.
3. a kind of electric rice cooker heated control method, it is based on the electric cooker described in one of claim 1-2, it is characterised in that institute
Stating control method includes：
Step 1：Controller controls the heating power of the internal pot of heater to be p, in anhydrous boiling stage, p=p1, the first temperature biography
Vapor (steam) temperature produces the first temperature signal in sensor detection pot, and first temperature signal is sent into controller, controller root
The first temperature t of steam in pot is obtained according to first temperature signal1；
Step 2：Pot temperature produces second temperature signal in second temperature sensor detection, and the second temperature signal is sent to
Controller, controller obtains the second temperature t of interior pot temperature according to the second temperature signal2；
Step 3：Three-temperature sensor detection pot surface temperature produces the 3rd temperature signal, and the 3rd temperature signal is sent out
Controller is given, controller obtains the 3rd temperature t of pot surface temperature according to the 3rd temperature signal2；
Step 4：Controller is according to the first temperature t1, second temperature t2Calculate from anhydrous boiling stage and be switched to the stage of cooking rice over a slow fire
Switching time T0。
Step 5：Controller controls the heating power of the internal pot of heater to be p, in the stage of cooking rice over a slow fire, p=pw+p2；
Wherein, p2For insulation power, PwFor power switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594039.4A CN107224191B (en) | 2017-07-20 | 2017-07-20 | A kind of electric cooker and its thermal-insulation control method of automatic heat preserving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710594039.4A CN107224191B (en) | 2017-07-20 | 2017-07-20 | A kind of electric cooker and its thermal-insulation control method of automatic heat preserving |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107224191A true CN107224191A (en) | 2017-10-03 |
| CN107224191B CN107224191B (en) | 2019-02-22 |
Family
ID=59957540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710594039.4A Active CN107224191B (en) | 2017-07-20 | 2017-07-20 | A kind of electric cooker and its thermal-insulation control method of automatic heat preserving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107224191B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109770724A (en) * | 2018-12-21 | 2019-05-21 | 广东伊莱特电器有限公司 | A pot with an external temperature sensor |
| CN112256069A (en) * | 2020-10-23 | 2021-01-22 | 珠海格力电器股份有限公司 | Cooking control method and device for cooker and electronic device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2669746Y (en) * | 2003-12-12 | 2005-01-12 | 林志鹏 | Wireless thermometric pan tool |
| CN1608563A (en) * | 2003-10-16 | 2005-04-27 | 松下电器产业株式会社 | rice cooker |
| CN101243842A (en) * | 2008-03-10 | 2008-08-20 | 浙江苏泊尔家电制造有限公司 | Control method for boiling rice with electric cooker |
| CN102240180A (en) * | 2011-07-05 | 2011-11-16 | 佛山市顺德区美的电热电器制造有限公司 | Circuit board for IH (Indirect Heating) rice cooker |
| JP2012187295A (en) * | 2011-03-11 | 2012-10-04 | Panasonic Corp | Rice cooker |
| JP2012223238A (en) * | 2011-04-15 | 2012-11-15 | Hitachi Appliances Inc | rice cooker |
| CN203723881U (en) * | 2014-02-20 | 2014-07-23 | 九阳股份有限公司 | Intelligent cooking utensil |
-
2017
- 2017-07-20 CN CN201710594039.4A patent/CN107224191B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608563A (en) * | 2003-10-16 | 2005-04-27 | 松下电器产业株式会社 | rice cooker |
| CN2669746Y (en) * | 2003-12-12 | 2005-01-12 | 林志鹏 | Wireless thermometric pan tool |
| CN101243842A (en) * | 2008-03-10 | 2008-08-20 | 浙江苏泊尔家电制造有限公司 | Control method for boiling rice with electric cooker |
| JP2012187295A (en) * | 2011-03-11 | 2012-10-04 | Panasonic Corp | Rice cooker |
| JP2012223238A (en) * | 2011-04-15 | 2012-11-15 | Hitachi Appliances Inc | rice cooker |
| CN102240180A (en) * | 2011-07-05 | 2011-11-16 | 佛山市顺德区美的电热电器制造有限公司 | Circuit board for IH (Indirect Heating) rice cooker |
| CN203723881U (en) * | 2014-02-20 | 2014-07-23 | 九阳股份有限公司 | Intelligent cooking utensil |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109770724A (en) * | 2018-12-21 | 2019-05-21 | 广东伊莱特电器有限公司 | A pot with an external temperature sensor |
| CN112256069A (en) * | 2020-10-23 | 2021-01-22 | 珠海格力电器股份有限公司 | Cooking control method and device for cooker and electronic device |
| CN112256069B (en) * | 2020-10-23 | 2022-05-27 | 珠海格力电器股份有限公司 | Cooking control method and device for cooker and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107224191B (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105747835B (en) | A kind of cooking control method of electric cooker | |
| CN102444914B (en) | Stove and method for preventing dry-out | |
| CN108652433A (en) | Method for cooking rice and electromagnetic heating cooking appliance | |
| WO2020062650A1 (en) | Cooking appliance, and heat preservation control method and determination method therefor | |
| WO2019184188A1 (en) | Control device and method for pressure cooking appliance, and pressure cooking appliance | |
| CN105342363B (en) | A kind of cooking apparatus and its temperature control method | |
| CN108567313B (en) | Cooking control method for cooking utensil and cooking utensil | |
| JP2012247074A (en) | Heating cooker | |
| JP5496168B2 (en) | Cooker | |
| DK160122B (en) | PROCEDURE FOR MANAGING THE HEATING OF A LIQUID LOAD IN A COOKING EQUIPMENT | |
| CN107224191B (en) | A kind of electric cooker and its thermal-insulation control method of automatic heat preserving | |
| CN105852617A (en) | Control method and control device of cooking appliance | |
| CN107348831B (en) | Electric cooker capable of correcting heating time and heating control method thereof | |
| CN206333777U (en) | Electric oven | |
| CN110244801B (en) | Rice cooking apparatus and rice cooking control method | |
| CN108019797B (en) | A kind of commercial induction cooker and control method automatically controlling power | |
| CN112493873B (en) | Intelligent cooker temperature control system, method and computer storage medium | |
| TWI851127B (en) | IH Cooking Oven | |
| CN110876560B (en) | Cooking appliance control method and device and cooking appliance | |
| CN208253669U (en) | A smart cooker with weighing function | |
| CN107348832B (en) | Electric cooker based on minimum cooking amount and heating control method thereof | |
| JPH0137923B2 (en) | ||
| CN109259611A (en) | Cooking appliance and heat preservation control method and determination method thereof | |
| JP2007312871A (en) | Warming device and rice cooker with the device | |
| CN108627281B (en) | A kind of household appliance temperature measurement calibration method and temperature measurement calibration device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |