CN102687985A - Electric cooker and heat preservation method thereof - Google Patents
Electric cooker and heat preservation method thereof Download PDFInfo
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- CN102687985A CN102687985A CN2011100714065A CN201110071406A CN102687985A CN 102687985 A CN102687985 A CN 102687985A CN 2011100714065 A CN2011100714065 A CN 2011100714065A CN 201110071406 A CN201110071406 A CN 201110071406A CN 102687985 A CN102687985 A CN 102687985A
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Abstract
The invention provides an electric cooker and a heat preservation method thereof. The heat preservation method of the electric cooker comprises the following steps that: a control unit receives a preset heating mode selected by the user from multiple preset heating modes; a temperature detection unit obtains the temperature of a heating area in a liner; and a control unit receives the temperature of the heating area, and controls the heating device according to the preset heating mode selected by the user to preserve heat of the food contained in the liner according to the preset heat preservation curve. According to the invention, the heating device is controlled according to the heat preservation mode selected by the user to preserve heat of the food contained in the liner according to the preset heat preservation curve, the heat preservation needs for different functions can be met, and the heat preservation temperature is dynamically set according to the external input and the conditions in the electric cooker so as to solve the problem that the electric cooker of the prior art cannot dynamically set the heat preservation temperature according to the conditions inside and outside.
Description
Technical field
The present invention relates to a kind of kitchen utensils field, relate in particular to a kind of electric cooker and heat preserving method thereof.
Background technology
The electric cooker of present domestic sale has only one " insulation " shelves, and its insulation scope is at 60 ℃-80 ℃, and Fig. 1 shows the insulation curve synoptic diagram of the electric cooker of prior art.As shown in Figure 1, when electric cooker of the prior art accomplish cook wait operate after, holding temperature can only be stabilized on certain fixed value.So, when temperature retention time is longer, may cause food spoilage.
And external electric cooker, though its insulation shelves are divided into soak and two grades of low temperature insulations, can only be to the rice insulation, and insulating process is geostationary, promptly some condition curing.The electric cooker that adopts this kind mode to be incubated, even extraneous factor is different, electric cooker also can only adopt identical insulation curve, can't holding temperature dynamically be set according to inside and outside situation.
Summary of the invention
The present invention aims to provide a kind of electric cooker and heat preserving method thereof, to solve the problem that electric cooker of the prior art can't dynamically be provided with holding temperature according to inside and outside situation.
To achieve these goals, according to an aspect of the present invention, a kind of electric cooker heat preserving method is provided, has comprised: control module receives user's selected predetermined heat pattern from a plurality of predetermined heat patterns; Temperature detecting unit obtains the Heating Zone Temperature in the inner bag; Control module receives Heating Zone Temperature, and is incubated according to predetermined insulation curve according to the predetermined heat pattern control heater that the user selects.
Further, when the predetermined heat pattern was the insulation pattern, control module control heater was incubated the food that holds in the inner bag according to predetermined insulation curve and comprises: judge that whether Heating Zone Temperature is greater than the first preset temperature threshold; When Heating Zone Temperature during greater than preset first temperature threshold, control module drops to the first temperature threshold time control refrigerating/heating apparatus in Heating Zone Temperature and starts working; When heater is heated to first heating-up temperature with Heating Zone Temperature, the heating of control module control heater stop, wherein, first heating-up temperature is greater than the first preset temperature threshold.
Further, control module control heater is incubated also the food that holds in the inner bag according to predetermined insulation curve and comprises: when Heating Zone Temperature is less than or equal to the first preset temperature threshold, and the heating of control module control heater; When heater is heated to second heating-up temperature with Heating Zone Temperature, the heating of control module control heater stop, wherein, second heating-up temperature is greater than first heating-up temperature.
Further; When the predetermined heat pattern was first heating mode, control module control heater was incubated the food that holds in the inner bag according to predetermined insulation curve and comprises: the predetermined temperature interval division is second subinterval of first subinterval of the corresponding first insulation shelves, the corresponding second insulation shelves and the 3rd subinterval of corresponding the 3rd insulation shelves; When the pairing operation completion of first heating mode and Heating Zone Temperature are less than or equal to the second preset temperature threshold; Control module control heater is started working; And carry out first cyclic process based on predetermined times or preset time; First cyclic process comprises: the work of control module control heater makes Heating Zone Temperature rise to the 3rd heating-up temperature; When heater is heated to the 3rd heating-up temperature with Heating Zone Temperature, the heating of control module control heater stop; When Heating Zone Temperature dropped to the 4th heating-up temperature, control module control heater was started working, and wherein, the 3rd heating-up temperature is positioned at the first insulation shelves, and the 4th heating-up temperature is positioned at the second insulation shelves, and the first insulation shelves temperature is greater than the second insulation shelves temperature.
Further; When the predetermined heat pattern was second heating mode, the control heater was incubated the food that holds in the inner bag according to predetermined insulation curve and comprises: with second subinterval and corresponding three insulation shelves three subinterval of predetermined temperature interval division for first subinterval of the corresponding first insulation shelves, the corresponding second insulation shelves; When the pairing operation completion of second heating mode and Heating Zone Temperature are less than or equal to the 3rd preset temperature threshold; Control module control heater is started working; And carry out second cyclic process based on predetermined times or preset time; Be stabilized on the predetermined middle Wen Wendu until Heating Zone Temperature, second cyclic process comprises: the work of control module control heater makes Heating Zone Temperature rise to ceiling temperature; When heater is heated to ceiling temperature with Heating Zone Temperature, the heating of control module control heater stop; When Heating Zone Temperature drops to lower limit temperature; Control module control heater is started working; Wherein, the initial value of ceiling temperature is positioned at the first insulation shelves, and the initial value of lower limit temperature is positioned at the 3rd insulation shelves; Ceiling temperature increases progressively and successively decreases according to the predetermined variation amount with cycle-index or time, and lower limit temperature increases progressively and increases progressively according to the predetermined variation amount with cycle-index or time.
Further; When carrying out second cyclic process based on predetermined times, control module is carried out the n time second cyclic process and is comprised: judge in the n time second cyclic process through the predetermined variation amount and whether successively decrease the ceiling temperature Tmax (n) that obtains greater than the average temperature value Tmid (n-1) in the n-1 time second cyclic process; When the ceiling temperature Tmax (n) in the n time that obtains second cyclic process greater than the average temperature value Tmid (n-1) in the n-1 time second cyclic process, then the n time second cyclic process actual temperature confirmed as the ceiling temperature Tmax (n) that successively decreases and obtain through the predetermined variation amount; Ceiling temperature Tmax (n) in the n time that obtains second cyclic process is less than or equal to the n-1 time second average temperature value Tmid (n-1) in the cyclic process; Then the n time second cyclic process actual upper bound temperature confirmed as the n-1 time second average temperature value Tmid (n-1) in the cyclic process; Wherein, Average temperature value Tmid (n-1) in the n-1 time second cyclic process is the n-1 time second actual upper bound temperature and the mean value of actual lower limit temperature in the cyclic process, and n is more than or equal to 2 and less than the natural number of pre-determined number.
Further, control module is carried out the n time second cyclic process and is also comprised: judge that whether the lower limit temperature Tmin (n) that increases progressively acquisition through the predetermined variation amount in the n time second cyclic process is less than the average temperature value Tmid (n-1) in the n-1 time second cyclic process; When the lower limit temperature Tmin (n) in the n time that obtains second cyclic process less than the average temperature value Tmid (n-1) in the n-1 time second cyclic process, then the n time second cyclic process actual temperature confirmed as the lower limit temperature Tmin (n) that increases progressively acquisition through the predetermined variation amount; Lower limit temperature Tmin (n) in the n time that obtains second cyclic process is greater than or equal to the n-1 time second average temperature value Tmid (n-1) in the cyclic process, then the n time second cyclic process actual lower limit temperature is confirmed as the n-1 time second average temperature value Tmid (n-1) in the cyclic process.
Further, the predetermined variation amount obtains in such a way: obtain the preset insulation amount when carrying out second heating mode, and the correction insulation amount when obtaining second heating mode and accomplishing; The predetermined variation amount is confirmed as the absolute value of the difference of preset insulation amount and correction insulation amount; Wherein, When preset insulation amount adopts the operation of carrying out second heating mode correspondence; Food in the inner bag characterizes from predetermined sample temperature to the required time that seethes with excitement, and when correction insulation amount adopted the pairing operation of second heating mode to accomplish, the temperature slippage characterized in the predetermined amount of time.
Further; When the pairing operation of second heating mode is accomplished; The temperature slippage is lower than preset maximum temperature slippage in the predetermined amount of time; Then the predetermined variation amount obtains in such a way: obtain the preset insulation amount when carrying out second heating mode, and the maximum modified insulation amount when obtaining second heating mode and accomplishing; With the absolute value of predetermined variation amount for the difference of preset insulation amount and maximum modified insulation amount, wherein, maximum modified insulation amount adopts preset maximum temperature slippage to characterize.
Another aspect according to we's invention provides a kind of electric cooker, comprising: operating unit is used to receive the predetermined heat pattern that the user selects; Temperature detecting unit is used to obtain the Heating Zone Temperature in the inner bag; Control module is connected with operating unit and temperature detecting unit; Heater; Be connected with control module; Wherein, control module receives user selected predetermined heat pattern and Heating Zone Temperature from a plurality of predetermined heat patterns, and the predetermined heat pattern control heater of selecting according to the user is incubated according to predetermined insulation curve.
Use technical scheme of the present invention; Through adopting the insulation pattern control heater of selecting according to the user according to being scheduled to the mode that the insulation curve is incubated the food that holds in the inner bag; Can satisfy the insulation demand of difference in functionality; Input and the inner situation of electric cooker according to the outside dynamically are provided with holding temperature, thereby have solved the problem that electric cooker of the prior art can't dynamically be provided with holding temperature according to inside and outside situation.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the insulation curve synoptic diagram of the electric cooker of prior art;
Fig. 2 shows the overall structure sketch map of the employed electric cooker of the embodiment of the invention;
Fig. 3 shows the circuit theory sketch map of the employed electric cooker of the embodiment of the invention;
Fig. 4 shows the electric cooker heat preserving method flow chart of the embodiment of the invention one;
Fig. 5 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention one;
Fig. 6 shows the electric cooker heat preserving method flow chart of the embodiment of the invention two;
Fig. 7 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention two;
Fig. 8 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention three; And
Fig. 9 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention four.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 2 shows the overall structure sketch map of the employed electric cooker of the embodiment of the invention.As shown in Figure 2, electric cooker comprises operating unit 10, display unit 30, temperature detecting unit and heater.
Wherein, temperature detecting unit comprises loam cake temperature detecting unit 51 and cooking bottom temperature detecting unit 53, and heater comprises loam cake heater 71, sidepiece heater 73 and bottom heater 75.
Loam cake temperature detecting unit 51 is the temperature that are used for detecting meal pot pot body top, and feeds back to control module; Cooking bottom temperature detecting unit 53 is the temperature that are used for detecting the bottom of a pan, and feeds back to control module.Then the temperature in the inner container of electric cooker is judged by loam cake temperature detecting unit 51 and the 53 common detections of cooking bottom temperature detecting unit.Its decision method can calculate through averaging, and also can calculate through weighted average through giving predetermined weights to loam cake temperature detecting unit 51 and the temperature that cooking bottom temperature detecting unit 53 obtains.
And loam cake heater 71 is used for heating pad pot loam cake cover plate, is convenient to internally that pot carries out heating from top to bottom, and its device form can be heater elements such as heating wire or heater coil; Sidepiece heater 73 is used for a heating pad pot pot body middle part, and its device form can be heater elements such as heating wire or heater coil; Inner bag is carried on the heater 75 of bottom, and internal pot heats bottom heater 75 from the bottom, and its device form can be heater elements such as heat-generating disc or heater coil.The heater that comprises loam cake heater 71, sidepiece heater 73 and bottom heater 75 through control carries out work, just can realize the effect that food in the inner bag is heated.
Fig. 3 shows the circuit theory sketch map of the employed electric cooker of the embodiment of the invention.As shown in Figure 3, the user can select a kind of heating mode through operating unit 10 from multiple predetermined heat pattern.Control module 90 is according to user's selection; By the temperature detecting unit feedback temperature information that comprises loam cake temperature detecting unit 51 and cooking bottom temperature detecting unit 53, carry out work or quit work thereby control comprises the heater of loam cake heater 71, sidepiece heater 73 and bottom heater 75.Simultaneously, its duty can be shown by display unit 30.
Wherein, in an embodiment of the present invention, employed electric cooker predetermined temperature interval division is a plurality of subintervals, and the corresponding insulation shelves in each subinterval.According to the difference of selected predetermined heat pattern, employed electric cooker can be implemented heat insulation function in the embodiments of the invention in different insulation shelves, thereby can different food be incubated under different holding temperatures.Wherein, the temperature range of each insulation shelves can be selected according to user's actual conditions, and perhaps rule of thumb value is confirmed.And in an embodiment of the present invention, operating unit 10 can be selected different insulation shelves, and shows the state that meal is stewed through display unit 2, as showing soak, the insulation of middle temperature, three show labels of low temperature insulation.
In order to reduce the control difficulty, generally be second subinterval and corresponding the 3rd insulation shelves the 3rd subinterval of first subinterval of the corresponding first insulation shelves, the corresponding second insulation shelves with the predetermined temperature interval division.For example, can be that the temperature range section definition of [75 ℃, 95 ℃] is the high temperature shelves with temperature range according to the sensation of human body, perhaps be defined as the first insulation shelves; With temperature range be [65 ℃, 75 ℃) the temperature range section definition be middle temperature shelves, perhaps be defined as the second insulation shelves; With temperature range be [45 ℃, 65 ℃) the temperature range section definition be the low temperature shelves, perhaps be defined as the 3rd insulation shelves.
And, can divide the pattern of heating according to institute's heat food kind in the heat-preservation liner.According to the content of its solution (like water, sour milk) after the completion of electric cooker function, heating mode is divided into two kinds.A kind of is first heating mode, and under this heating mode, heating function is accomplished its solution content of back high (can obviously see moisture), like congee, soup, boiling, sour milk, stewed etc.; A kind of is second heating mode, under this heating mode, its solution content low (almost can't see moisture) after heating function is accomplished, as cook, cake etc.
Describe for ease; To be [75 ℃, 95 ℃] with the temperature range of the first insulation shelves below, the temperature range of the second insulation shelves be [65 ℃; 75 ℃); The temperature range of the 3rd insulation shelves be [45 ℃, 65 ℃) dividing mode be example, introduce the heat preserving method of the electric cooker shown in Fig. 2 and Fig. 3 in detail.
Fig. 4 shows the electric cooker heat preserving method flow chart of the embodiment of the invention one.As shown in Figure 4, the electric cooker heat preserving method comprises:
S101, control module receives user's selected insulation pattern from a plurality of predetermined heat patterns;
S103, temperature detecting unit obtain the Heating Zone Temperature in the inner bag;
S105, control module receives Heating Zone Temperature, and the food that holds in the inner bag is incubated according to predetermined insulation curve according to the insulation pattern control heater that the user selects.
In the present embodiment promptly, what illustrate is the user when using electric cooker, the heat preserving mode of electric cooker when directly selecting heat insulation function.Be to be the user when using electric cooker shown in the present embodiment, make electric cooker directly get into the situation of keeping warm mode from holding state.
Particularly, control module control heater is incubated the food that holds in the inner bag according to predetermined insulation curve and comprises:
Whether judge Heating Zone Temperature greater than the first preset temperature threshold, promptly after the user selected the insulation pattern, temperature detecting unit detected electric cooker and carries out the Heating Zone Temperature in the preceding inner bag of the corresponding operation of insulation pattern.Control module 90 receives the interior Heating Zone Temperature of inner bag of temperature detecting unit feedback; And judge that whether Heating Zone Temperature is greater than the first preset temperature threshold; Whether more a certain temperature value is high promptly to judge the interior Heating Zone Temperature of inner container of electric cooker; Should can set up on their own by the user by the first preset temperature threshold, perhaps confirm according to the model and the purposes of electric cooker by the manufacturer.If the more a certain temperature value of the Heating Zone Temperature in the inner container of electric cooker is high; The temperature that is the thermal treatment zone is greater than a preset temperature threshold; Then control module 90 drops to this temperature threshold time control refrigerating/heating apparatus in Heating Zone Temperature and starts working; When heater is heated to first heating-up temperature with the Heating Zone Temperature in the inner bag, control module 90 control heater stop heating.As preset temperature threshold is set is 65 ℃, if the detected Heating Zone Temperature of temperature detecting unit is higher than 65 ℃ before getting into keeping warm mode, waits for that then heater was started working when Heating Zone Temperature in the electric cooker pot was equal to or less than 65 ℃; When heater is heated to first temperature with the food in inner bag and the inner bag, heater stop work, and the holding temperature of food in the inner bag is stabilized in first temperature.Wherein, first temperature is a preset temperature that is higher than first temperature threshold, and its temperature value can be a preferable temperature value of food heat insulation effect that can make insulation in the inner bag, also can be for being positioned at the arbitrary temp value of three insulation shelves.
Can find out from the course of work of heater that then under the insulation pattern and Heating Zone Temperature during greater than preset first temperature threshold, predetermined insulation curve comprises three phases:
Phase I, the detected Heating Zone Temperature of temperature detecting unit before get into keeping warm mode of the Heating Zone Temperature in the inner bag is reduced to the first predetermined temperature threshold;
Second stage rises to first heating-up temperature with the Heating Zone Temperature in the inner bag from the first predetermined temperature threshold;
Phase III is with constant first heating-up temperature that remains on of the Heating Zone Temperature in the inner bag.
If the Heating Zone Temperature in the inner container of electric cooker is less than or equal to the first preset temperature threshold; Promptly after the user selects the insulation pattern; The interior Heating Zone Temperature of inner bag was less than or equal to the first preset temperature threshold before temperature detecting unit detected the corresponding operation of electric cooker execution insulation pattern; Then control module 90 control heaters are started working, when heater is heated to second heating-up temperature with Heating Zone Temperature, and the heating of control module control heater stop.As preset temperature threshold is set is 65 ℃, if the detected temperature of temperature detecting unit is less than or equal to 65 ℃ before getting into keeping warm mode, then heater is started working; When heater is heated to second temperature with the food in inner bag and the inner bag, heater stop work, and the holding temperature of food in the inner bag is stabilized in second temperature.Wherein, second temperature is a preset temperature that is higher than first temperature, and its temperature value can be a preferable temperature value of food heat insulation effect that can make insulation in the inner bag, can be positioned at the arbitrary temp value of three insulation shelves.But generally speaking, second temperature and first temperature all are positioned at same insulation shelves, but that second temperature and first temperature all are positioned at the second insulation grade effect is more outstanding.
Can find out from the course of work of heater that then under the insulation pattern and Heating Zone Temperature when being less than or equal to the first preset temperature threshold, predetermined insulation curve comprises two stages:
Phase I, the detected Heating Zone Temperature of temperature detecting unit before get into keeping warm mode of the Heating Zone Temperature in the inner bag is risen to second heating-up temperature;
Second stage is with constant second heating-up temperature that remains on of the Heating Zone Temperature in the inner bag.
Through adopting the heat preserving mode in the present embodiment; The insulation pattern control heater of selecting according to the user is incubated the food that holds in the inner bag according to predetermined insulation curve; Can satisfy the insulation demand of difference in functionality; Input and the inner situation of electric cooker according to the outside dynamically are provided with holding temperature, thereby have solved the problem that electric cooker of the prior art can't dynamically be provided with holding temperature according to inside and outside situation.
Fig. 5 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention one.As shown in Figure 5, be moment of 0 in temperature retention time, temperature detecting unit detects the Heating Zone Temperature in the inner bag, and feeds back to control module 90.If control module 90 is when detecting the electric cooker temperature greater than a certain preset temperature (as 65 ℃); Then control module 90 control heaters are incubated the food that holds in the inner bag according to the insulation curve of curve D, are stabilized at last on the middle warm grade interior one relatively low temperature; If control module 90 is when detecting the electric cooker temperature and being less than or equal to a certain preset temperature (as 65 ℃); Then control module 90 control heaters are incubated the food that holds in the inner bag according to the insulation curve of curve E, are stabilized at last on the middle warm grade interior one higher relatively temperature.And the course of work of heater describes in detail in Fig. 4, is not described in detail at this.
Fig. 6 shows the electric cooker heat preserving method flow chart of the embodiment of the invention two.As shown in Figure 6, after being used to select first heating mode to heat, the heat preserving method of electric cooker comprises:
S201, control module receives user's selected first heating mode from a plurality of predetermined heat patterns.
Particularly, the heating mode that control module is imported through operating unit 10 according to the user heats the food that holds in the inner container of electric cooker.And control module is second subinterval of first subinterval of corresponding first insulation shelves, corresponding second insulation shelves and three subinterval of corresponding three insulation shelves in input with the predetermined temperature interval division according to the user.
Wherein, under first heating mode, heating function is accomplished its solution content of back high (can obviously see moisture), like congee, soup, boiling, sour milk, stewed etc.
S203, temperature detecting unit obtain the Heating Zone Temperature in the inner bag.
S205, when the pairing operation completion of first heating mode and Heating Zone Temperature were less than or equal to the second preset temperature threshold, control module control heater was started working, and carries out first cyclic process based on predetermined times or preset time.
Particularly, first cyclic process comprises:
The work of control module control heater makes Heating Zone Temperature rise to the 3rd heating-up temperature; When heater is heated to the 3rd heating-up temperature with Heating Zone Temperature, the heating of control module control heater stop; When Heating Zone Temperature dropped to the 4th heating-up temperature, control module control heater was started working.Wherein, the 3rd heating-up temperature is positioned at the first insulation shelves, and the 4th heating-up temperature is positioned at the second insulation shelves.
In the present embodiment promptly; After the corresponding operation completion of first heating mode and the Heating Zone Temperature in the inner bag drop to a certain temperature threshold (as being equal to or less than 65 ℃); Control module 90 control heater work make fluctuation back and forth between two preset temperature values of meal pot kettle temperature.
Can find out from the course of work of heater that then under first heating mode, predetermined insulation curve is the curve of cyclical fluctuations that between two temperature values, fluctuates back and forth.
And, in the present embodiment, when control module control heater is carried out corresponding operation, confirm the preset insulation amount M1 under this operator scheme, and confirm the correction insulation amount M2 when the corresponding operation of first heating mode is accomplished.Correspondingly; Control module combines preset insulation amount M1 and revises insulation amount M2; Set the parameters such as heating power size and heating input time of maximum of T max1, minimum of a value Tmid1, the heater of fluctuation, just can more accurately control heating unit and carry out corresponding heating operation according to given parameter.Wherein, when preset insulation amount M1 adopted the operation of carrying out first heating mode correspondence, the food in the inner bag characterized from predetermined sample temperature to the required time that seethes with excitement.Here, characterize and to be meant preset insulation amount, perhaps reflect through the time with the numerical value of time correlation with relevant to the required time that seethes with excitement from predetermined sample temperature.Promptly preset insulation amount M1 can be when carrying out the corresponding operation of first heating mode, and the food in the inner bag is from the numerical value of predetermined sample temperature to the required time that seethes with excitement; In the time of perhaps can holding the corresponding operation of first heating mode, characterize from the predetermined relevant numerical value of sample temperature to the required time that seethes with excitement with food in the inner bag through row.
And when revising insulation amount M2 and adopting the pairing operation of first heating mode to accomplish; The temperature slippage characterizes in the predetermined amount of time; When promptly revising insulation amount M2 and can accomplish for the pairing operation of first heating mode, the numerical value of the Heating Zone Temperature slippage in the predetermined amount of time in the inner bag; In the time of perhaps can accomplishing, characterize with the numerical value that the temperature slippage is relevant in the predetermined amount of time through the pairing operation of first heating mode.As, when setting predetermined sample temperature and being 40 degrees centigrade, the food in the inner bag from 40 ℃ to the required time that seethes with excitement be 20 minutes, then predetermined insulation amount is 20; And if inner bag in Heating Zone Temperature in preset time (as 2 hours), the temperature slippage is 10 ℃, then revising insulation amount M2 is 10.
Simultaneously; In the present embodiment; In order to prevent the excessive taste of food that influences of temperature slippage; When the Heating Zone Temperature slippage in the inner bag in the predetermined amount of time had surpassed certain value, control module stopped timing, and according to the preset insulation amount M1 under this operator scheme, maximum modified insulation amount M2max; Set the parameters such as heating power size and heating input time of maximum of T max1, minimum of a value Tmid1, the heater of fluctuation, just can more accurately control heating unit and carry out corresponding heating operation according to given parameter.Wherein, maximum modified insulation amount M2max is the numerical value of preset maximum temperature slippage.After pairing operation is accomplished like first heating mode, before the entering insulation pattern; The Heating Zone Temperature that detects in the inner bag is 98 ℃; (in 2 hours) its Heating Zone Temperature drops to less than a certain temperature threshold (as 65 ℃) in preset time, and then maximum modified insulation amount is 33 (98-65).
In the present embodiment promptly; When judging preset insulation amount M1, also can be before heating mode be accomplished, according to various other feedback informations (like weight, volume etc.); Judge the insulation amount that follow-up insulating process need be used; And being not limited to temperature, promptly preset insulation amount M1 can be when carrying out the corresponding operation of first heating mode, characterizes from relevant various other the feedback informations (like weight, volume etc.) of predetermined sample temperature to the required time that seethes with excitement with food in the inner bag.Likewise; Judge when revising insulation amount M2; In the time of can also accomplishing through the pairing operation of first heating mode, relevant with temperature slippage in the predetermined amount of time various other feedback information (like weight, volume etc.) values characterize, to obtain insulation amount more accurately.
Draw ambient temperature value from insulation amount and temperature slippage side in the present embodiment; The running parameter of synthetic setting heat insulation function; Reach the demand that rationally is incubated under the situation of different insulation amounts, varying environment temperature; Make the kettle temperature fluctuation cause cross-ventilation, keep the nutrition and the taste of food to greatest extent, avoid phenomenon through long-time insulation back food spoilage.
Fig. 7 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention two.As shown in Figure 7, explain that 1 representes the workspace of the operation of first heating modes such as carrying out congee, soup, boiling, sour milk, stew, promptly carry out the corresponding operation of first heating mode at this stage heater.And, obtain preset insulation amount M1 at this stage control module.
And temperature natural decline was distinguished after the corresponding operation completion of 2 expressions, first pattern was described, judged and revised insulation amount M2.The comprehensive preset insulation amount M1 of 3 expressions is described and revises insulation amount M2, the high-temperature temperature Tmax and the middle Wen WenduT mid of heating power size, power input time and a plurality of waveforms amplitude is set.
The steps A stage is represented to judge to revise after the insulation amount to temperature and drops to the time smaller or equal to 65 ℃; Drop to smaller or equal to 65 ℃ like temperature in 2H; Then this section period is zero, and control module is judged to be maximum modified insulation amount M2max immediately, and the control heater is started working.Tmax representes high-temperature temperature, Wen Wendu during Tmid representes.After pairing operation is accomplished like first heating mode, before the entering insulation pattern; The Heating Zone Temperature that detects in the inner bag is 98 ℃; (in 2 hours) its Heating Zone Temperature drops to less than a certain temperature threshold (as 65 ℃) in preset time; Then maximum modified insulation amount is 33, i.e. 98 and 65 difference.
Specify the electric cooker heat preserving method when the user selects second heating mode to heat below in conjunction with Fig. 8.
Select the heat preserving method of first heating mode similar with the user, after the user selected second heating mode to heat, the heat preserving method of electric cooker comprised:
Control module receives user's selected second heating mode from a plurality of predetermined heat patterns; Temperature detecting unit obtains the Heating Zone Temperature in the inner bag; Temperature detecting unit obtains the Heating Zone Temperature in the inner bag; When the pairing operation completion of second heating mode and Heating Zone Temperature are less than or equal to the 3rd preset temperature threshold; Control module control heater is started working; And carry out second cyclic process based on predetermined times or preset time, be stabilized on the predetermined middle Wen Wendu until Heating Zone Temperature.
Wherein, the heating mode that control module is imported through operating unit 10 according to the user heats the food that holds in the inner container of electric cooker.And control module is second subinterval of first subinterval of corresponding first insulation shelves, corresponding second insulation shelves and three subinterval of corresponding three insulation shelves in input with the predetermined temperature interval division according to the user.Be that control module 90 is controlled at the first insulation shelves, the second insulation shelves, second are incubated and do the more and more littler fluctuation insulation of temperature amplitude between the shelves.Wherein, under second heating mode, its solution content low (almost can't see moisture) after heating function is accomplished, as cook, cake etc.
Second cyclic process comprises: the work of control module control heater makes Heating Zone Temperature rise to ceiling temperature; When heater is heated to ceiling temperature with Heating Zone Temperature, the heating of control module control heater stop; When Heating Zone Temperature drops to lower limit temperature; The work of control module control heater; Wherein, the initial value of ceiling temperature is positioned at the first insulation shelves, and the initial value of lower limit temperature is positioned at the 3rd insulation shelves; Ceiling temperature increases progressively and successively decreases according to the predetermined variation amount with cycle-index or time, and lower limit temperature increases progressively and increases progressively according to the predetermined variation amount with cycle-index or time.
When carrying out second cyclic process based on predetermined times, control module is carried out the n time second cyclic process and is comprised:
Judge in the n time second cyclic process through the predetermined variation amount and whether successively decrease the ceiling temperature Tmax (n) that obtains greater than the average temperature value Tmid (n-1) in the n-1 time second cyclic process; When the ceiling temperature Tmax (n) in the n time that obtains second cyclic process greater than the average temperature value Tmid (n-1) in the n-1 time second cyclic process, then the n time second cyclic process actual temperature confirmed as the ceiling temperature Tmax (n) that successively decreases and obtain through the predetermined variation amount; Ceiling temperature Tmax (n) in the n time that obtains second cyclic process is less than or equal to the n-1 time second average temperature value Tmid (n-1) in the cyclic process; Then the n time second cyclic process actual temperature confirmed as the n-1 time second average temperature value Tmid (n-1) in the cyclic process; Wherein, The actual upper bound temperature in the n-1 time second cyclic process of average temperature value Tmid (n-1) in the n-1 time second cyclic process and the mean value of actual lower limit temperature, n are more than or equal to 2 and less than the natural number of pre-determined number.
And control module is carried out the n time second cyclic process and is also comprised: judge that whether the lower limit temperature Tmin (n) that increases progressively acquisition through the predetermined variation amount in the n time second cyclic process is less than the average temperature value Tmid (n-1) in the n-1 time second cyclic process; When the lower limit temperature Tmin (n) in the n time that obtains second cyclic process less than the average temperature value Tmid (n-1) in the n-1 time second cyclic process, then the n time second cyclic process actual temperature confirmed as the lower limit temperature Tmin (n) that increases progressively acquisition through the predetermined variation amount; Lower limit temperature Tmin (n) in the n time that obtains second cyclic process is greater than or equal to the n-1 time second average temperature value Tmid (n-1) in the cyclic process, then the n time second cyclic process actual temperature is confirmed as the n-1 time second average temperature value Tmid (n-1) in the cyclic process.
Wherein, in the present embodiment, the predetermined variation amount obtains in such a way: obtain the preset insulation amount M1 when carrying out second heating mode, and the correction insulation amount M2 when obtaining second heating mode and accomplishing; Predetermined variation amount C is confirmed as the absolute value of the difference of preset insulation amount M1 and correction insulation amount M2.If C is zero, be one greater than zero fixed value (as 2) then to C assignment again.Wherein, When preset insulation amount M1 adopts the operation of carrying out second heating mode correspondence; Food in the inner bag characterizes from predetermined sample temperature to the required time that seethes with excitement, and when correction insulation amount M2 adopted the pairing operation of second heating mode to accomplish, the temperature slippage characterized in the predetermined amount of time.
Wherein, When preset insulation amount M1 adopts the operation of carrying out second heating mode correspondence; Food in the inner bag characterizes from predetermined sample temperature to the required time that seethes with excitement; Promptly preset insulation amount M1 is that the food in the inner bag is from the numerical value of predetermined sample temperature to the required time that seethes with excitement when carrying out the operation of second heating mode correspondence; In the time of perhaps can holding the corresponding operation of second heating mode, characterize from the predetermined relevant numerical value of sample temperature to the required time that seethes with excitement with food in the inner bag through row.And when revising insulation amount M2 and adopting the pairing operation of first heating mode to accomplish; The temperature slippage characterizes in the predetermined amount of time; When promptly revising insulation amount M2 and be the pairing operation of second heating mode and accomplishing, the numerical value of the Heating Zone Temperature slippage in the predetermined amount of time in the inner bag; In the time of perhaps can accomplishing, characterize with the numerical value that the temperature slippage is relevant in the predetermined amount of time through the pairing operation of second heating mode.As, when setting predetermined sample temperature and being 40 degrees centigrade, the food in the inner bag from 40 ℃ to the required time that seethes with excitement be 20 minutes, then predetermined insulation amount is 20; And if inner bag in Heating Zone Temperature in preset time (as 2 hours), the temperature slippage is 10 ℃, then revising insulation amount M2 is 10.
Likewise; In the present embodiment; In order to prevent the excessive taste of food that influences of temperature slippage; When the Heating Zone Temperature slippage in the inner bag in the predetermined amount of time had surpassed certain value, control module stopped timing, and according to the preset insulation amount M1 under this operator scheme, maximum modified insulation amount M2max; Set the parameters such as heating power size and heating input time of maximum of T max1, minimum of a value Tmid1, the heater of fluctuation, just can more accurately control heating unit and carry out corresponding heating operation according to given parameter.And the predetermined variation amount C of this moment confirms as the absolute value of the difference of preset insulation amount M1 and maximum modified insulation amount M2max.If C is zero, be one greater than zero fixed value (as 2) then to C assignment again.Wherein, maximum modified insulation amount M2max adopts preset maximum temperature slippage to characterize.After pairing operation is accomplished like second heating mode, before the entering insulation pattern; The Heating Zone Temperature that detects in the inner bag is 98 ℃; (in 2 hours) its Heating Zone Temperature drops to less than a certain temperature threshold (as 65 ℃) in preset time; Then maximum modified insulation amount is 33, i.e. 98 and 65 difference.
For example; At heater during in the corresponding operation of second pattern that executes; The temperature slippage that the electric cooker program detects within a certain period of time (in 2 hours) is as revising insulation amount M2, and this section in the period its minimum temperature greater than 65 ℃, or this section in the period its minimum temperature in a single day be equal to or less than 65 ℃; It is maximum modified insulation amount M2max that predetermined temperature variation then is set, and stops the timing of this section period immediately.
Be the initial ceiling temperature Tmax1 that sets of control module 90, initial in running parameters such as Wen WenduT mid1, initial lower limit temperature Tmin1, power input size and power input time, the 1st fluctuation insulation done in the work of control heater.After the 1st fluctuation insulation finished, Tmax1 deducted the high-temperature temperature Tmax2 of predetermined variation amount C as the 2nd fluctuation, and Tmin1 adds the cryogenic temperature Tmin2 of C as the 2nd fluctuation.And Tmax2 is greater than and equals Tmid1, otherwise Tmax2 is Tmid1 with regard to value), Tmin2 is less than and equals Tmid1, otherwise Tmin2 is Tmid1 with regard to value.The mean value of Tmax2 and Tmin2 is as the middle Wen WenduT mid2 of the 2nd fluctuation.In conjunction with parameters such as the power of above-mentioned setting input size and power input times, the work of control heater is done the 2nd fluctuation and is incubated.By that analogy, in follow-up a plurality of fluctuations, its parameter is all set according to the parameter of previous fluctuation.After the process insulation of long period, last holding temperature is stabilized on the predetermined temperature T mid.
Principle and the purpose of setting above-mentioned heating condition are: function accomplish drop to temperature be equal to or less than 65 ℃ after; The control heater is started working, and makes temperature fluctuation insulation back and forth between the first insulation shelves, the second insulation shelves, the 3rd insulation shelves of the food that holds in the electric cooker pot inner bag.Temperature upper limit and lower limit that the initial temperature value Tmax1 of second cyclic process, Tmin1 are incubated as first fluctuation.In follow-up a plurality of fluctuation insulating processes; In conjunction with temperature amplitude variable value C; Temperature upper limit is littler than the higher limit of previous wave process, and the lowest temperature value is bigger than the lower limit of previous wave process, and temperature upper limit is greater than the middle temperature temperature value that equals previous fluctuation; The lowest temperature value is smaller or equal to the middle temperature temperature value of previous fluctuation, and the mean value of temperature upper limit and lower limit is as the middle temperature shelves temperature value of this wave process.Because the temperature difference of temperature upper limit and lower limit progressively reduces, the amplitude when then fluctuating also progressively reduces, and promptly through after repeatedly fluctuation is incubated, a middle temperature shelves temperature trends towards a stationary value, and last holding temperature also trends towards stablizing.
Can find out from the course of work of heater that then under second heating mode, predetermined insulation curve is the curve of cyclical fluctuations of decaying gradually.
Fig. 8 shows the insulation curve synoptic diagram of the electric cooker of the embodiment of the invention four.
In Fig. 8, preset insulation amount M1 is judged in the workspace of function such as explain that 1 expression meal pot is cooked.Temperature natural decline was distinguished after the completion of 2 presentation functions was described, judged and revised insulation amount M2.The comprehensive preset insulation amount M1 of 3 expressions is described and revises insulation amount M2; Ceiling temperature Tmax1, Tmax2, Tmax3 of heating power size, power input time and a plurality of waveforms amplitude etc., middle Wen Wendu initial value Tmid1 and lower limit temperature Tmin1, Tmin2, Tmin3 etc. are set, and follow-up average temperature value Tmid2, Tmid3 etc. are the mean value of capping temperature and lower limit temperature then.After explaining that 4 expressions are through the long period insulation, final holding temperature is stabilized on the middle Wen WenduT mid.
Letter A representes to judge to revise after the insulation amount to temperature and drops to the time smaller or equal to 65 ℃; Drop to smaller or equal to 65 ℃ like temperature in 2H; Then this section period is zero, and control module is judged to be maximum modified insulation amount M2max immediately, and the control heater is started working.Tmax1, Tmid1, Tmin1 represent ceiling temperature, average temperature value, the lower limit temperature of the 1st fluctuation; Tmax2, Tmid2, Tmin2 represent the ceiling temperature of the 2nd fluctuation, middle Wen Wendu, lower limit temperature, and Tmax3, Tmid3, Tmin3 represent ceiling temperature, average temperature value, the lower limit temperature of the 3rd fluctuation.
Fig. 9 is an electric cooker insulation flow process of the present invention.In Fig. 9, the high temperature shelves are the insulation of first shown in previous embodiment shelves, and middle temperature shelves are the insulation of second shown in previous embodiment shelves, and the low temperature shelves are the insulation of the 3rd shown in previous embodiment shelves.Concrete process step is following:
The S1 step: control module judges that at first whether meal pot is at holding state.As at holding state, then get into the S2 step; As, then get into the S9 step not at holding state.
The S2 step: whether control module decision operation unit 2 has the insulation input operation.As do not have, then get into the S27 step; If any the insulation input operation, get into the S3 step.
The S3 step: before carrying out heat insulation function work, judge that at first whether meal pot kettle temperature is greater than 65 ℃.Smaller or equal to 65 ℃, then get into the S4 step like meal pot kettle temperature; Greater than 65 ℃, then get into the S5 step like meal pot kettle temperature;
S4 step: in middle temperature temperature range, be provided with a relative higher temperature value as in temperature shelves temperature (as 72 ℃), and running parameters such as bigger input power and power input time are set, get into S7 and go on foot.
S5 step: in middle temperature temperature range, be provided with a relatively lower temp value as in temperature shelves temperature (as 67 ℃), and running parameters such as less input power and power input time are set, get into S6 then and go on foot.
The S6 step: control module judges that this moment, whether meal stewed kettle temperature smaller or equal to 65 ℃.Smaller or equal to 65 ℃, then get into the S7 step like meal pot kettle temperature; Still greater than 65 ℃, then proceed the S6 judgement in step like meal pot kettle temperature.
The S7 step: temperature shelves insulation in the entering, the running parameter during insulation was provided with by S4 step or S5 step, and the work of control heater makes holding temperature be stabilized in middle Wen Wendu.Get into the S8 step.
The S8 step: whether control module decision operation unit 2 has the input operation of shutdown.As do not have, then continue to get into the S7 step; If any, then get into the S26 step.
The S9 step: control module judges that whether meal pot is at the function operation state.As, then get into S10 step; As do not exist, then get into the S27 step.
S10 step: control module judge whether for cook, function such as cake.In this way, then get into the S11 step; As not then to get into the S18 step.
S11 step: cooking, judging preset insulation amount M1 in the process of function operation such as cake, and getting into the S12 step.
The S12 step: whether functions such as the control module judgement is cooked, cake are accomplished.As do not accomplish, then continue the S12 judgement in step; As accomplishing, then get into the S13 step.
S13 step: after cooking, function such as cake accomplishes, control module is judged within a certain period of time (in 2 hours) meal pot kettle temperature slippage as revising insulation amount M2, and the minimum temperature of its decline in this section period gets into the S14 step greater than 65 ℃; Or this section in the period its temperature in a single day drop to smaller or equal to 65 ℃, judge that then this temperature slippage is maximum modified insulation amount M2max, and stop the timing operation of this section period, get into the S14 step.
The S14 step: according to preset insulation amount M1 and correction insulation amount M2 or M2max; Middle Wen WenduT mid1 in high-temperature temperature Tmax1 in the synthetic setting high temperature shelves temperature range, the middle temperature shelves temperature range, the cryogenic temperature Tmin1 in the low temperature shelves temperature range, and the power input is big or small and power input time etc. running parameter.And by the absolute value of difference between M1 and M2 or the M2max as temperature amplitude variable value C, if C is zero, be one greater than zero fixed value (as 2) then to C assignment again.Get into the S15 step.
S15 step: control module judges that meal pot kettle temperature whether smaller or equal to 65 ℃, greater than 65 ℃, then proceeds the judgement that S15 goes on foot as still; As, then get into the S16 step smaller or equal to 65 ℃.
S16 step: running parameters such as the high-temperature temperature Tmax1 that control module was set according to the S14 step, middle Wen WenduT mid1, cryogenic temperature Tmin1 and power input size and power input time, the 1st fluctuation insulation done in the work of control heater.After the 1st fluctuation insulation finishes; Tmax1 deducts the high-temperature temperature Tmax2 of C as the 2nd fluctuation; Tmin1 adds the cryogenic temperature Tmin2 of C as the 2nd fluctuation; And Tmax2 be greater than equal Tmid1 (otherwise Tmax2 is Tmid1 with regard to value), Tmin2 is less than and equals Tmid1 (otherwise Tmin2 is Tmid1 with regard to value), the mean value of Tmax2 and Tmin2 is as the middle Wen WenduT mid2 of the 2nd fluctuation, in conjunction with parameters such as the power input size of above-mentioned setting and power input times; The 2nd fluctuation insulation done in the work of control heater.By that analogy, in follow-up a plurality of fluctuations, its parameter is all set according to the parameter of previous fluctuation.After the process insulation of long period, last holding temperature is stabilized on the middle temperature shelves temperature T mid.Get into the S17 step.
The S17 step: whether control module decision operation unit 2 has the input operation of shutdown.As do not have, then proceed the fluctuation insulation in S16 step; If any, then get into the S26 step.
S18 step: control module judges whether to congee, soup, boiling, sour milk, function such as stewes.In this way, then get into the S19 step; As not then to get into the S27 step.
S19 step: at congee, soup, boiling, sour milk, stew etc. in the process of function operation and judge preset insulation amount M1, and get into the S20 step.
S20 step: control module judges whether congee, soup, boiling, sour milk, function such as stewed are accomplished.As do not accomplish, then continue the S20 judgement in step; As accomplishing, then get into the S21 step.
S21 step: at congee, soup, boiling, sour milk, stew etc. after function accomplishes; Control module judges that the meal of (in 2 hours) is stewed the kettle temperature slippage as revising insulation amount M2 within a certain period of time; And the minimum temperature of its decline gets into the S22 step greater than 65 ℃ in this section period; Or this section in the period its temperature in a single day drop to smaller or equal to 65 ℃, judge that then this temperature slippage is maximum modified insulation amount M2max, and stop the timing operation of this section period, get into the S22 step.
The S22 step: according to preset insulation amount M1 and correction insulation amount M2 or M2max; Middle Wen WenduT mid1 in high-temperature temperature Tmax1 in the synthetic setting high temperature shelves temperature range, the middle temperature shelves temperature range, and the power input is big or small and power input time etc. running parameter.Get into the S23 step.
S23 step: control module judges that meal pot kettle temperature whether smaller or equal to 65 ℃, greater than 65 ℃, then proceeds the judgement that S23 goes on foot as still; As, then get into the S24 step smaller or equal to 65 ℃.
S24 step: running parameters such as the high-temperature temperature Tmax1 that control module was set according to the S22 step, middle Wen WenduT mid1 and power input size and power input time, the 1st fluctuation insulation done in the work of control heater.After the 1st fluctuation insulation finished, the 2nd fluctuation started working, and it is consistent with the 1st fluctuation parameter that it is provided with parameter.By that analogy, in follow-up a plurality of fluctuations, its parameter is all consistent with the 1st fluctuation parameter, in the promptly long-time insulating process, and the fluctuation back and forth between high-temperature temperature Tmax1 and middle Wen WenduT mid1 of control module control meal pot kettle temperature.Get into the S25 step.
The S25 step: whether control module decision operation unit 2 has the input operation of shutdown.As do not have, then proceed the fluctuation insulation in S24 step; If any, then get into the S26 step.
The S26 step: control module detects the shutdown input operation of operating unit 2, and control meal pot gets into holding state.And above-mentioned institute in steps in, except at holding state, if in case detect the shutdown input operation of operating unit 2, control module is just controlled meal pot and is got into holding state.
The S27 step: control module control meal pot carries out other operations.After other operations are accomplished, get into the S1 step to judge.
From above description, can find out that the above embodiments of the present invention have realized following technique effect:
Through adopting the heat preserving mode in the above embodiment of the present invention; The insulation pattern control heater of selecting according to the user is incubated the food that holds in the inner bag according to predetermined insulation curve; Can satisfy the insulation demand of difference in functionality; Input and the inner situation of electric cooker according to the outside dynamically are provided with holding temperature, thereby have solved the problem that electric cooker of the prior art can't dynamically be provided with holding temperature according to inside and outside situation.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an electric cooker heat preserving method is characterized in that, comprising:
Control module receives user's selected said predetermined heat pattern from a plurality of predetermined heat patterns;
Temperature detecting unit obtains the Heating Zone Temperature in the inner bag;
Said control module receives said Heating Zone Temperature, and is incubated according to predetermined insulation curve according to the said predetermined heat pattern control heater that the user selects.
2. electric cooker heat preserving method according to claim 1 is characterized in that, when said predetermined heat pattern was the insulation pattern, control module control heater was incubated the food that holds in the said inner bag according to said predetermined insulation curve and comprises:
Judge that whether said Heating Zone Temperature is greater than the first preset temperature threshold;
When said Heating Zone Temperature during greater than the said first preset temperature threshold, said control module is controlled said heater and is started working when said Heating Zone Temperature drops to said first temperature threshold;
When said heater was heated to first heating-up temperature with said Heating Zone Temperature, said control module was controlled said heater stop heating,
Wherein, said first heating-up temperature is greater than the said first preset temperature threshold.
3. electric cooker heat preserving method according to claim 2 is characterized in that, control module is controlled said heater and according to said predetermined insulation curve the food that holds in the said inner bag is incubated also and comprises:
When said Heating Zone Temperature was less than or equal to the first preset temperature threshold, said control module was controlled said heater heating;
When said heater is heated to said Heating Zone Temperature when equaling second heating-up temperature, said control module is controlled said heater stop heating,
Wherein, said second heating-up temperature is greater than said first heating-up temperature.
4. electric cooker heat preserving method according to claim 1; It is characterized in that; When said predetermined heat pattern was first heating mode, control module was controlled said heater and according to said predetermined insulation curve the food that holds in the said inner bag is incubated and comprises:
With the predetermined temperature interval division is second subinterval of first subinterval of the corresponding first insulation shelves, the corresponding second insulation shelves and the 3rd subinterval of corresponding the 3rd insulation shelves;
When the pairing operation of said first heating mode is accomplished and said Heating Zone Temperature when being less than or equal to the said second preset temperature threshold; Said control module is controlled said heater and is started working; And carry out first cyclic process based on predetermined times or preset time
Said first cyclic process comprises:
Control module is controlled said heater work, makes said Heating Zone Temperature rise to the 3rd heating-up temperature;
When said heater was heated to said Heating Zone Temperature said the 3rd heating-up temperature, control module was controlled said heater stop heating;
When said Heating Zone Temperature dropped to the 4th heating-up temperature, control module was controlled said heater and is started working,
Wherein, said the 3rd heating-up temperature is positioned at the first insulation shelves, and the 4th heating-up temperature is positioned at the second insulation shelves, and the said first insulation shelves temperature is greater than the said second insulation shelves temperature.
5. electric cooker heat preserving method according to claim 1 is characterized in that, when said predetermined heat pattern is second heating mode, controls said heater and according to said predetermined insulation curve the food that holds in the said inner bag is incubated and comprises:
With the predetermined temperature interval division is second subinterval and corresponding the 3rd insulation shelves the 3rd subinterval of first subinterval of the corresponding first insulation shelves, the corresponding second insulation shelves;
When the pairing operation of said second heating mode is accomplished and said Heating Zone Temperature when being less than or equal to said the 3rd preset temperature threshold; Said control module is controlled said heater and is started working; And carry out second cyclic process based on predetermined times or preset time; Be stabilized on the predetermined middle Wen Wendu until said Heating Zone Temperature
Said second cyclic process comprises:
Control module is controlled said heater work, makes said Heating Zone Temperature rise to ceiling temperature;
When said heater was heated to said ceiling temperature with said Heating Zone Temperature, control module was controlled said heater stop heating;
When said Heating Zone Temperature dropped to lower limit temperature, control module was controlled said heater and is started working,
Wherein, The initial value of said ceiling temperature is positioned at the said first insulation shelves; The initial value of said lower limit temperature is positioned at said the 3rd insulation shelves; Said ceiling temperature increases progressively and successively decreases according to the predetermined variation amount with cycle-index or time, and said lower limit temperature increases progressively and increases progressively according to the predetermined variation amount with said cycle-index or time.
6. electric cooker heat preserving method according to claim 5 is characterized in that, when carrying out second cyclic process based on predetermined times, said control module is carried out the n time second cyclic process and comprised:
Judge in said the n time second cyclic process through said predetermined variation amount and whether successively decrease the ceiling temperature Tmax (n) that obtains greater than the average temperature value Tmid (n-1) in 1 time second cyclic process of said n;
Ceiling temperature Tmax (n) in said the n time second cyclic process of obtaining then confirms as the ceiling temperature Tmax (n) that successively decreases and obtain through said predetermined variation amount with said the n time second cyclic process actual temperature greater than the average temperature value Tmid (n-1) in said the n-1 time second cyclic process;
Ceiling temperature Tmax (n) in said the n time second cyclic process of obtaining is less than or equal to the average temperature value Tmid (n-1) in said the n-1 time second cyclic process; Then said the n time second cyclic process actual temperature confirmed as the average temperature value Tmid (n-1) in said the n-1 time second cyclic process
Wherein, the average temperature value Tmid (n-1) in said the n-1 time second cyclic process is actual upper bound temperature and the mean value of actual lower limit temperature in said the n-1 time second cyclic process, and n is more than or equal to 2 and less than the natural number of said pre-determined number.
7. electric cooker heat preserving method according to claim 6 is characterized in that, said control module is carried out the n time second cyclic process and also comprised:
Judge that whether the lower limit temperature Tmin (n) that increases progressively acquisition through said predetermined variation amount in said the n time second cyclic process is less than the average temperature value Tmid (n-1) in said the n-1 time second cyclic process;
Lower limit temperature Tmin (n) in said the n time second cyclic process of obtaining then confirms as the lower limit temperature Tmin (n) that increases progressively acquisition through said predetermined variation amount with said the n time second cyclic process actual temperature less than the average temperature value Tmid (n-1) in said the n-1 time second cyclic process;
Lower limit temperature Tmin (n) in said the n time second cyclic process of obtaining is greater than or equal to the average temperature value Tmid (n-1) in said the n-1 time second cyclic process, then said the n time second cyclic process actual temperature is confirmed as the average temperature value Tmid (n-1) in said the n-1 time second cyclic process.
8. according to each described electric cooker heat preserving method in the claim 5 to 7, it is characterized in that said predetermined variation amount obtains in such a way:
Obtain the preset insulation amount when carrying out said second heating mode, and the correction insulation amount when obtaining said second heating mode and accomplishing;
Said predetermined variation amount is confirmed as the absolute value of the difference of said preset insulation amount and said correction insulation amount,
Wherein, when said preset insulation amount adopted the operation of carrying out said second heating mode correspondence, the food in the said inner bag characterized from predetermined sample temperature to the required time that seethes with excitement,
When said correction insulation amount adopted the pairing operation of said second heating mode to accomplish, the temperature slippage in the predetermined amount of time characterized.
9. according to each described electric cooker heat preserving method in the claim 5 to 7; It is characterized in that; When the pairing operation of said second heating mode is accomplished; The temperature slippage is lower than preset maximum temperature slippage in the said predetermined amount of time, and then said predetermined variation amount obtains in such a way:
Obtain the preset insulation amount when carrying out said second heating mode, and the maximum modified insulation amount when obtaining said second heating mode and accomplishing;
Said predetermined variation amount is confirmed as the absolute value of the difference of said preset insulation amount and said maximum modified insulation amount,
Wherein, said maximum modified insulation amount adopts preset maximum temperature slippage to characterize.
10. an electric cooker is characterized in that, comprising:
Operating unit is used for receiving the user from the selected predetermined heat pattern of a plurality of predetermined heat patterns;
Temperature detecting unit is used to obtain the Heating Zone Temperature in the inner bag;
Control module is connected with said operating unit and said temperature detecting unit;
Heater is connected with said control module,
Wherein, said control module receives said predetermined heat pattern and the said Heating Zone Temperature that the user selects, and controls said heater according to the said predetermined heat pattern of user's selection and is incubated according to predetermined insulation curve.
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