CN102429574A - Electric pressure cooker capable of automatically controlling pressure and pressure control method thereof - Google Patents
Electric pressure cooker capable of automatically controlling pressure and pressure control method thereof Download PDFInfo
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- CN102429574A CN102429574A CN201110336266XA CN201110336266A CN102429574A CN 102429574 A CN102429574 A CN 102429574A CN 201110336266X A CN201110336266X A CN 201110336266XA CN 201110336266 A CN201110336266 A CN 201110336266A CN 102429574 A CN102429574 A CN 102429574A
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Abstract
The invention discloses an electric pressure cooker capable of automatically controlling pressure and a pressure control method thereof, relating to the technical field of kitchen utensils and solving the problem that the traditional electric pressure cooker with multi-stage pressure control has higher cost. The electric pressure cooker capable of automatically controlling pressure, disclosed by the embodiment of the invention, comprises a cooker cover, a cooker body, a cooker liner and a control device for detecting and controlling change of cooking pressure; the control device comprises a reference pressure switch for setting reference pressure and an obscure pressure control unit for setting target pressure; when the cooking pressure reaches the reference pressure, the reference pressure switch is triggered to actuate to send a pressurizing signal, and the obscure pressure control unit is used for controlling the cooling pressure to reach the target pressure from the reference pressure while detecting the pressurizing signal. The embodiment of the invention is mainly used for various electric pressure cookers.
Description
Technical field
The present invention relates to the kitchen appliance technical field, relate in particular to electric pressure cooking saucepan automatic pressure-controlled in the kitchen appliance and compress control method thereof.
Background technology
Raising along with the electric pressure cooking saucepan safety coefficient; The use of electric pressure cooking saucepan has obtained popularizing preferably; Existing electric pressure cooking saucepan has comparatively rich functions; Especially have the function of setting different culinary art pressure to different foods, make that user's selectivity is better, and the food mouthfeel of cooking out is also better.The scheme of setting culinary art pressure when carrying out different food cooking in the prior art mainly comprises following two kinds:
The first, on the pot cover of electric pressure cooking saucepan, temperature-sensing element is set,, extrapolates pot inner pressure roughly after the temperature, thereby carry out pressure control thereby be implemented in to detect according to the roughly corresponding relation of temperature and pressure.
The second, in the bottom of electric pressure cooking saucepan a plurality of pressure switches are set, the corresponding a kind of culinary art pressure of each pressure switch is realized the control of multistage pressure.
Realizing and using in the process of above-mentioned electric pressure cooking saucepan; The inventor finds to exist at least in the prior art following problem: when adopting first kind of temperature controlled scheme; Food in pot more for a long time, pressure gathers way and gathers way soon than temperature, causes can not accurately carrying out pressure control; When adopting the scheme of second kind of adjusting pressure switch, can only attend institute's setting pressure switch according to pressure cooker and carry out pressure control, realize that the cost of multistage pressure control is higher.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of prior art and a kind of automatic pressure-controlled electric pressure cooking saucepan and compress control method thereof is provided, and reduces the multistage pressure control cost of electric pressure cooking saucepan.
For achieving the above object, the present invention adopts following technical scheme:
A kind of automatic pressure-controlled electric pressure cooking saucepan comprises pot cover, pot body, pot courage, is used to detect and control the control device that culinary art pressure changes; Said control device comprises the reference pressure switch of setting reference pressure and the fuzzy pressure control unit of set target pressure; Culinary art pressure touches the reference pressure switch motion and sends the pressure signal when reaching reference pressure, control culinary art pressure reached goal pressure from reference pressure when fuzzy pressure control unit detected the pressure signal.
Be provided with the induction kettle courage in the said pot body and cooked the displacement induction installation that the pressure effect produces change in displacement, when culinary art pressure reached reference pressure, the displacement induction installation touched the reference pressure switch motion and sends the pressure signal.
Said fuzzy pressure control unit comprises computing module and selects module.
Said displacement induction installation comprises the elastic supporting member for supporting optical member that supports the pot courage, the touch pole that reaches shake-up reference pressure switch.
Said reference pressure switch is bimetal leaf flash switch or microswitch.
A kind of compress control method that is applied to said electric pressure cooking saucepan, said control device also comprises memory cell and timing unit, be preset with in the memory cell be used to control the culinary art pressure reach the required heating parameter sequence W of goal pressure from reference pressure
n, and with heat parameter W
nCorresponding sequence t fiducial time
n, said compress control method comprises that with the next stage order is carried out:
The pressure stage in the heating: the control device startup is heated to the reference pressure switch and sends the pressure signal, and timing unit calculates goes up pressure time t
0
The time-delay heating period: sequence t fiducial time is confirmed in fuzzy pressure control unit
nIn with last pressure time t
0Corresponding t fiducial time
m(m≤n), and select heating parameter sequence W
nIn with t fiducial time
mCorresponding heating parameter W
mTime-delay is heated to goal pressure.
Said control device also comprises the compensatory pressure switch that is used for goal pressure is carried out deviation compensation, and the said time-delay heating period is further comprising the steps of:
Timing unit calculates the incremental time Δ t from the switch motion of reference pressure switch motion to compensatory pressure
0, control device is according to incremental time Δ t
0With the benchmark increment Delta t that is preset in the memory cell
bComparative result correction heating parameter W
mTo reduce to cook the deviation that pressure reaches goal pressure.
Said electric pressure cooking saucepan comprises the pressure switch of the different big or small pressure of a plurality of settings, and the pressure stage is further comprising the steps of in the said heating:
Control device selection control culinary art pressure reaches goal pressure from middle pressure and has the corresponding pressure switch of minimum deviation value as reference pressure switch generation pressure signal.
Said pressure switch comprises low tension switch and high-voltage switch gear, and the pressure stage is further comprising the steps of in the said heating:
The heating rate of said fuzzy pressure control unit judges cooking food, if the heating rate of cooking food is during greater than the benchmark heating rate that is preset in the memory cell, fuzzy pressure control unit selects low tension switch as the reference pressure switch; Otherwise fuzzy pressure control unit selects high-voltage switch gear as the reference pressure switch.
Said heating parameter is heating power and/or heat time heating time.
Automatic pressure-controlled electric pressure cooking saucepan provided by the invention and compress control method thereof; Adopt pressure controlled mode to carry out the control of multistage pressure; When the goal pressure that reaches at needs is identical with the reference pressure of design, can adopt reference pressure to control, the present invention is primarily aimed under the situation of goal pressure greater than reference pressure; Control culinary art pressure reaches goal pressure from reference pressure when detecting the pressure signal through fuzzy pressure control unit; The mode of this fuzzy pressure control can make that a pot interior actual pressure can be approaching with goal pressure, and can adapt to the pressure control more for a long time of pot interior food, makes pressure divergence be unlikely to too big.
In addition; Because the embodiment of the invention adopts fuzzy pressure scheme; Can use less pressure switch to realize the pressure control of more gear; For example: can adopt a pressure switch to realize two sections and above pressure control, adopt two pressure switches to realize three sections and above pressure control, and so on; For complete multistage pressure control scheme in the prior art, can reduce the quantity of pressure switch, reduce the pressure cooker cost.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is an electric pressure cooker structure sketch map automatic pressure-controlled in the embodiment of the invention one;
Fig. 2 is the theory diagram of control device in the embodiment of the invention one;
Fig. 3 is the flow chart of electric pressure cooking saucepan compress control method in the embodiment of the invention two;
Fig. 4 is the flow chart of electric pressure cooking saucepan compress control method in the embodiment of the invention three.
The specific embodiment
In order to overcome temperature controlled inaccuracy; Pressure switch can be set on electric pressure cooking saucepan; Thereby realize pressure control; And under the situation that two pressure switches are set, can realize the control of segmentation pressure, two pressure switches have two opening pressures, and the user can select any one opening pressure to carry out pressure control.If the user has selected the low-grade pressure in the pressure switch, then electrical pressure cooker control circuit can begin pressurize after the switch that detects low-grade pressure breaks off; If the user has selected the high-grade pressure in the pressure switch, then electrical pressure cooker control circuit can continue heating after the switch that detects low-grade pressure breaks off, up to the switch disconnection the beginning again pressurize of high-grade pressure.
Because the pressure switch gear is limited; In order to realize the pressure control more than two sections; Pressure switch is set to adjustable form or increases the gear of pressure switch, adopts above-mentioned which kind of mode all can increase the design complexities of pressure switch, makes the design cost of pressure cooker increase.
To above-mentioned situation; Embodiment of the invention design is a kind of can to realize the pressure controlled scheme of multistage at low cost; To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention carried out clear, intactly description, obviously; Described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one:
The embodiment of the invention provides a kind of automatic pressure-controlled electric pressure cooking saucepan; As shown in Figure 1; This electric pressure cooking saucepan comprises pot cover 10, pot body 20, pot courage 30 and is used to detect and control the control device that culinary art pressure changes, the reference pressure switch 21 of the control device in the embodiment of the invention in comprising Fig. 1, in the control circuit board 22 of the general integrated design of other structure in Fig. 1; Said reference pressure switch 21 is triggered when culinary art pressure reaches reference pressure and moves and send and press signal; In the embodiment of the invention reach culinary art during pressure the reference pressure switch can break off, produce cut-off signal, this cut-off signal just can be used as the pressure signal.After having set goal pressure, if any one is identical for goal pressure and pressure switch opening pressure, then can adopt existing scheme to control, repeat no more here.
Integrated design is as shown in Figure 2 in the part of control circuit board in the embodiment of the invention control device; This control device comprises the fuzzy pressure control unit 221 of set target pressure; When on detecting, pressing signal, fuzzy pressure control unit 221 control culinary art pressure reach goal pressure from reference pressure.
Automatic pressure-controlled electric pressure cooking saucepan provided by the invention; Adopt pressure controlled mode to carry out the control of multistage pressure; When the goal pressure that reaches at needs is identical with the reference pressure of design, can adopt reference pressure to control, the present invention is primarily aimed under the situation of goal pressure greater than reference pressure; Control culinary art pressure reaches goal pressure from reference pressure when detecting the pressure signal through fuzzy pressure control unit 221; The mode of this fuzzy pressure control can make that a pot interior actual pressure can be approaching with goal pressure, more can adapt to the pressure control more for a long time of pot interior quantity of food than existing temperature control scheme, makes pressure divergence be unlikely to too big.Because the embodiment of the invention adopts fuzzy pressure control scheme, can use less pressure switch to realize the pressure control of more gear, for complete multistage pressure control scheme in the prior art, can reduce the quantity of pressure switch, reduce the pressure cooker cost.
Fuzzy pressure control unit 221 described in the embodiment of the invention comprises computing module 2211 and selects module 2212, wherein need preset be used to control culinary art pressure in the control device and reach the required heating parameter sequence W of goal pressure from reference pressure
n, and with heat parameter W
nCorresponding sequence t fiducial time
nAbove-mentioned computing module 2211 is confirmed sequence t fiducial time through computing
nIn with last pressure time t
0Corresponding t fiducial time
m(m≤n), then by selecting module 2212 to select heating parameter sequence W
nIn with t fiducial time
mCorresponding heating parameter W
mTime-delay is heated to goal pressure.For example; Concrete control mode can for: when on detecting, pressing signal, select for use the heating of delaying time of predetermined heating parameter to make culinary art pressure reach goal pressure from reference pressure, wherein selected heating parameter is mainly heating power or heat time heating time; The perhaps combination of heating power and heat time heating time; Specifically how to select, in the subsequent control method, detailed description is arranged, repeat no more here.
In order to make the reference pressure switch to send and press signal can touching the reference pressure switch under the state of reference pressure; In the pot body, be provided with the induction kettle courage in the embodiment of the invention and cooked the displacement induction installation that the pressure effect produces change in displacement; When culinary art pressure reaches reference pressure; The displacement induction installation touches the reference pressure switch motion and sends the pressure signal; Can elastic device be set at bottom of pot body in general,, make elastic device be out of shape and the generation change in displacement through the variation of elastic device induction kettle tooth pressure; Certainly, can also be in the embodiment of the invention with on the pot cover of elastic device setting or other positions of pot body; So the displacement induction installation in the embodiment of the invention can comprise the elastic supporting member for supporting optical member that supports the pot courage, the touch pole that reaches shake-up reference pressure switch.
Sensitivity for the reflection of reference pressure switch; Reference pressure switch in the embodiment of the invention can be two pressure switches or single pressure switches comparatively commonly used at present, and specifically pressure switch can adopt but be not limited to bimetal leaf flash switch or microswitch.
Embodiment two:
When using embodiment of the invention electric pressure cooking saucepan, need select a goal pressure; To guarantee the requirement realization pressure control of electric pressure cooking saucepan according to the user; So the electric pressure cooking saucepan in the embodiment of the invention comprises the control device of set target pressure; Generally speaking; The user can just can realize the selection of goal pressure when selecting cooking method, for example: the user selects to cook congee pattern, Baoshang pattern, the pattern of cooking, meat pattern etc., and corresponding different pattern all need be set its only goal pressure; Perhaps need its goal pressure of pattern of infusion bone higher for the meat pattern generally speaking, lower for the pattern of cooking congee or its goal pressure of Baoshang pattern.Goal pressure is about 30Kpa to 70Kpa, not wait generally speaking, and the embodiment of the invention does not limit the target pressure value of concrete setting.
The embodiment of the invention provides the compress control method that is applied to electric pressure cooking saucepan in the foregoing description one; In order to realize this compress control method; As shown in Figure 2; Control device also comprises memory cell 222 and timing unit 223 in the automatic pressure-controlled electric pressure cooking saucepan of the embodiment of the invention, and memory cell 222 also is on the control circuit board of integrated setting generally with timing unit 223; Be preset with in the said memory cell 222 be used to control the culinary art pressure reach the required heating parameter sequence W of goal pressure from reference pressure
n, and with heat parameter W
nCorresponding sequence t fiducial time
nElectric pressure cooking saucepan comprises the process that following order is carried out when specifically carrying out pressure control:
The pressure stage in the heating: the control device startup is heated to the reference pressure switch and sends the pressure signal, and timing unit 223 calculates goes up pressure time t
0
The time-delay heating period: sequence t fiducial time is confirmed in fuzzy pressure control unit 221
nIn with last pressure time t
0Corresponding t fiducial time
m(m≤n), and select heating parameter sequence W
nIn with t fiducial time
mCorresponding heating parameter W
mTime-delay is heated to goal pressure.Make pot inner pressure can rise to the pressure nearer through this time-delay heating, realize fuzzy pressure control, more can adapt to quantity of food pressure control more for a long time, make pressure divergence be unlikely to too big than temperature control scheme of the prior art with goal pressure.
At the concrete heating parameter W that selects
mThe time, the embodiment of the invention can adopt following scheme: at definite fiducial time of t
m(during m≤n), generally select the fiducial time minimum with in fact pressing time difference, the heating parameter that adopts this scheme to select can make the culinary art pressure of electric pressure cooking saucepan after the time-delay heating period finishes more near goal pressure.
Control device in the embodiment of the invention can also comprise input block and display unit, can cook the setting of pattern through input block, can show the various information of electric pressure cooking saucepan through display unit, like temperature, cooking time or the like.Certainly; Control device can also comprise other unit of not mentioning in the embodiment of the invention, so that realize the culinary art control of electric pressure cooking saucepan jointly, the embodiment of the invention mainly is absorbed in through the time-delay heating and is carried out pressure control; Other parts can adopt but be not limited to existing scheme, repeat no more.
The electric pressure cooking saucepan compress control method that adopts the embodiment of the invention to provide; Not only can pot inner pressure be controlled to reference pressure relatively preferably; For for the goal pressure of reference pressure; Can make pot inner pressure reach goal pressure through the time-delay heating, thereby realize the multistage pressure control of electric pressure cooking saucepan, realize the fuzzy control of pressure.And the embodiment of the invention has adopted pressure control, and control more can adapt to the pressure control more for a long time of pot interior quantity of food for temperature control scheme.In addition; Because the embodiment of the invention adopts fuzzy pressure scheme; Can use less pressure switch to realize the pressure control of more gear; For example: can adopt a pressure switch to realize two sections and above pressure control, adopt two pressure switches to realize three sections and above pressure control, and so on; For complete multistage pressure control scheme in the prior art, can reduce the quantity of pressure switch, reduce the pressure cooker cost.
After the continuation heating reached said delay time, pot inner pressure was approaching with goal pressure basically, can control electric pressure cooking saucepan afterwards and get into the pressurize handling procedure or directly stop heating.Concrete pressurize is handled can adopt existing scheme, as: can reheat more for a long time in the pot inner pressure reduction.
In order to guarantee the culinary art safety of electric pressure cooking saucepan; Need prevent at the electric pressure cooking saucepan pot inner pressure excessive; Electric pressure cooking saucepan in the embodiment of the invention is general to adopt two pressure switches to realize the reference pressure switches, and the medium-to-high grade pressure switch of two pressure switch to break off corresponding pressure be maximum reference pressure, can be designed as safeguard protection pressure; So above-mentioned control module also is used for pressure in electric pressure cooking saucepan and reaches after the maximum reference pressure control electric pressure cooking saucepan and carry out pressurize and handle or stop heating.In a single day thus, in time-delay heating process, the excessive problem of pressure occurs, can carry out safeguard protection, effectively avoided the appearance of quick-fried pot phenomenon.
Heating parameter in the embodiment of the invention mainly is meant heating power and/or the heat time heating time of time-delay heating period; For example can select heat time heating time or heating power separately according to the time of in fact pressing; Also can select heat time heating time and heating power simultaneously, specifically heat choosing of parameter and can adopt but be not limited to following scheme according to the time of in fact pressing:
The first, will the delay time heating power of heating period is fixed up as predefined heating power, and total power that generally can setting voltage power pot is as its heating power.In order to confirm heat time heating time, the heating parameter sequence W in the embodiment of the invention
nCan comprise and sequence t fiducial time
nThe corresponding rate of pressure rise sequence that reaches goal pressure from reference pressure; Control module 42 is according in fact pressing time t then
0Corresponding rate of pressure rise, the pressure differential that reaches between goal pressure and the reference pressure are calculated the heat time heating time that draws the time-delay heating period.
The second, will delay time the heating power of heating period as predefined heating power, and be fixed up, total power that generally can setting voltage power pot is as its heating power.In order to confirm heat time heating time, the heating parameter sequence W in the embodiment of the invention
nCan comprise and sequence t fiducial time
nCorresponding reaches required sequence T heat time heating time of goal pressure from reference pressure
nSo, control module 42 is at sequence T heat time heating time
nIn search and in fact press time t
0Corresponding T heat time heating time
mT heat time heating time as the time-delay heating period
m
Three, adopt predefined heat time heating time as heat time heating time of time-delay heating period, it is fixed up, how long specifically be set at can be through the preferable cooking time of experimental verification.In order to confirm heating power, heating parameter sequence W in the embodiment of the invention
nCan comprise and sequence t fiducial time
nCorresponding reaches the required heating power sequence P of goal pressure from reference pressure
nSo, control module 42 is at said heating power sequence P
nIn search and in fact press time t
0Corresponding heating power P
mHeating power as the time-delay heating period.
Four, can also be designed in the embodiment of the invention to delay time heating period heating power and be variation heat time heating time needs heating parameter sequence W
nComprise simultaneously and sequence t fiducial time
nCorresponding reaches the required heating power sequence P of goal pressure from reference pressure
nReach sequence T heat time heating time
nSo, said control module 42 is at sequence T heat time heating time
nIn search and in fact press time t
0Corresponding T heat time heating time
mAs the heat time heating time of time-delay heating period, and at said heating power sequence P
nIn search and in fact press time t
0Corresponding heating power P
mHeating power as the time-delay heating period.
The electric pressure cooking saucepan that carries out pressure detecting with two pressure switches below is an example; Electric pressure cooking saucepan compress control method in the embodiment of the invention is elaborated; And the pressure that adopts the low-grade pressure switch correspondence in two pressure switches in this scheme is as reference pressure; Detailed process is as shown in Figure 3, and this method comprises following process:
301, the user sets corresponding goal pressure when working voltage power pot; Concrete scheme can adopt but be not limited to above-mentioned scheme through the model selection set target pressure; The user can start working through associative operation starting resistor power pot afterwards; Electric pressure cooking saucepan began to heat and carried out timing this moment, got into the culinary art flow process.
302, detect two low and middle-grade pressure switches of pressure switch and whether break off,, then continue heating and carry out 302 processes if low-grade pressure switch is not broken off; If low-grade pressure switch is broken off, then carry out 303 processes.
303, stop timing and draw timing time as in fact pressing time t
0, and judges select target pressure is the low pressure gear, that is to say that the pressure of correspondence when whether goal pressure breaks off with low-grade pressure switch is identical, if identical, then carries out 310 processes; If inequality, expression also need be heated, and then carries out 304 processes.
The in fact pressure time t that timing draws in the scheme that provides in the embodiment of the invention
0Reach the used time of reference pressure for begin to be heated to culinary art pressure from electric pressure cooking saucepan; When concrete utilization; Those skilled in the art can change, and can draw and in fact press time t from beginning to reach the used time of reference pressure to culinary art pressure after electric pressure cooking saucepan heats a scheduled time
0, as long as follow-up sequence fiducial time is carried out modify.
304, judges select target pressure is the high pressure gear, that is to say that pressure corresponding when whether goal pressure breaks off with the medium-to-high grade pressure switch of two pressure switches is identical, if identical, then carries out 305 processes; If inequality, then carry out 306 processes.
Whether 305, continue the two medium-to-high grade pressure switches of pressure switch of heating and detection and break off, if high-grade pressure switch is not broken off, then 305 processes are carried out in continuation; If high-grade pressure switch is broken off, then expression has reached the goal pressure of culinary art, carries out 310 processes.
306, in order to make pot inner pressure reach goal pressure, can realize that through the mode of time-delay heating the embodiment of the invention need accurately draw the heating parameter of time-delay heating period.So sequence t fiducial time is confirmed in the fuzzy pressure control unit of embodiment of the invention electric pressure cooking saucepan
nIn with last pressure time t
0Corresponding t fiducial time
m(m≤n), and select heating parameter sequence W
nIn with t fiducial time
mCorresponding heating parameter W
mTime-delay is heated to goal pressure, and concrete heating parameter can adopt aforesaid heating power and/or heat time heating time.
307, continue electric pressure cooking saucepan is heated.
308, safer in order to make that electric pressure cooking saucepan uses; Guaranteeing in the time-delay heating process not can quick-fried pot; Whether the embodiment of the invention time-delay heating period need be detected two medium-to-high grade pressure switches of pressure switch and break off, if high-grade pressure switch is not broken off, then can continue heating and carry out 309 processes; If high-grade pressure switch is broken off, because high-grade pressure switch is represented maximum reference pressure, pot inner pressure has reached the upper limit of safe pressure, needs to adopt safeguard measure, so carry out 310 processes.
Whether the delay time of 309, judging the time-delay heating arrives, if do not arrive then can return 307 processes of execution, so that continue heating; If the arrival delay time representes that then pot inner pressure has reached goal pressure, can carry out 310 processes.
310, electric pressure cooking saucepan is carried out the pressurize processing or directly stops heating, concrete pressurize processing can be adopted but be not limited to pressurize flow process of the prior art.
After the scheme that the employing embodiment of the invention provides; Can realize the control of multistage pressure through time-delay; Though can not with the such accurate controlled pressure of pressure switch, the time of time-delay is passed through test of many times, can make pot inner pressure very near goal pressure; Error is less, belongs to than temperature control scheme and more adapts to pot more situation of interior quantity of food.
If the time-delay heating period is adopted fixing heating power, in order to confirm concrete time-delay heat time heating time, can press the Time Calculation delay time based on going up of electric pressure cooking saucepan in the embodiment of the invention, concrete mode includes but not limited to following scheme:
If first embodiment of the invention adopts the scheme of above-mentioned timing; Then can confirm delay time according to the last pressure time; The last pressure time here just is meant from beginning and is heated to the needed time of reference pressure that the electric pressure cooking saucepan internal pressure reaches setting; Promptly from beginning to be heated to the time of low-grade pressure switch disconnection, concrete computational methods comprise:
1) confirms to go up the pressure time through the scheme of above-mentioned timing;
2) in order accurately to confirm delay time; Can know the concrete pressure asynchronism(-nization) of going up through inventor's experimental verification; Rate of pressure rise after corresponding low-grade pressure switch is broken off is different; Through experimental verification, when low-grade pressure switch opening pressure is set at 30Kpa, concrete corresponding relation such as following table:
The time that pressure by pot inner pressure every rising 10Kpa after reaching 30Kpa in the last table needs is represented the rate of climb; When concrete utilization; Those skilled in the art can set in advance above-mentioned correspondence table in the control circuit of electric pressure cooking saucepan, and the pressure time is searched corresponding rate of pressure rise on the basis in last table when needs are delayed time calculating.Do not mark the pairing time of space of concrete rate of pressure rise in the last table, can select rate of pressure rise nearest in the form, generally select for the sake of security to a little bit smaller rate of pressure rise direction.
Certainly; Those skilled in the art can also carry out conversion to above table; For example represent the rate of climb through the pot inner pressure force value that per second rises after reaching 30Kpa; The rate of climb that above-mentioned 10s/10Kpa is corresponding can also be expressed as 1Kpa/s, and the rate of climb that 12s/10Kpa is corresponding can also be expressed as 0.83Kpa/s or the like, does not enumerate one by one here.
Suppose in the embodiment of the invention that going up the pressure time is 8min to 9min, then corresponding rate of pressure rise is 10s/10Kpa.
3) pressure differential between the reference pressure of said goal pressure of calculating and setting, hypothetical target pressure is 45Kpa, then pressure differential is 15Kpa.
4) calculate said delay time according to said pressure differential and rate of pressure rise, with 10s/10Kpa in the embodiment of the invention, can confirm the 15Kpa that need on the basis of 30Kpa, rise again, the needed time is 15s, so delay time is 15s.
If second does not adopt the mode of pressure time to confirm rate of pressure rise; Then can adopt pot interior quantity of food to confirm rate of pressure rise; The quantity of food here mainly is meant the content of material that can change into steam in the electric pressure cooking saucepan; Like moisture or the like, the timing action in above-mentioned 301 processes at this moment just can be omitted.Confirm that according to quantity of food the process of said delay time comprises in the embodiment of the invention:
1) quantity of food is perhaps obtained the interior quantity of food of pot that the user confirms in the detection pot, and the user can perhaps install corresponding water level detector through corresponding button directly with the input of the quantity of food in the electric pressure cooking saucepan, detects the interior quantity of food of pot through water temperature probe.
2) can in control circuit, preestablish the quantity of food and the rate of pressure rise table of comparisons in the embodiment of the invention; In this table of comparisons, search the rate of pressure rise corresponding with determined quantity of food then, concrete rate of climb expression mode can adopt but be not limited to first kind of mode in the scheme.
Rate of pressure rise in the embodiment of the invention is meant: reach the pressure 30Kpa of low-grade pressure switch disconnection at pot inner pressure after, and corresponding rate of pressure rise.
3) pressure differential between the reference pressure of said goal pressure of calculating and setting, hypothetical target pressure is 45Kpa, then pressure differential is 15Kpa.
4) calculate said delay time according to said pressure differential and rate of pressure rise, with 10s/10Kpa in the embodiment of the invention, can confirm the 15Kpa that need on the basis of 30Kpa, rise again, the needed time is 15s, so delay time is 15s.
Because pressure switch generally has a plurality of pressure; So the reference pressure in the embodiment of the invention can be chosen in a plurality of pressure and select; And can select a plurality of reference pressures, so just can enlarge the hop count of electric pressure cooking saucepan segmentation control, improve the control fineness of electric pressure cooking saucepan.Certainly, pressure minimum in generally speaking can the selection pressure switch is equivalent to the low and middle-grade pressure switches of selection pressure switch and breaks off corresponding pressure as reference pressure as reference pressure.
When the reference pressure switch of selection reference pressure correspondence; Can in program, set the corresponding pressure of a pressure switch in advance as reference pressure; Can select according to the goal pressure difference; For example: comprise the pressure switch of the different big or small pressure of a plurality of settings at electric pressure cooking saucepan, above-mentioned control device is selected control culinary art pressure to reach goal pressure from middle pressure to have the corresponding pressure switch of minimum deviation value and produce the pressure signal as the reference pressure switch.
Comprise in pressure switch under the situation of low tension switch and high-voltage switch gear; In order to carry out the selection of different reference pressures for the interior food of corresponding pot; The heating rate of fuzzy pressure control unit judges cooking food in the embodiment of the invention; If the heating rate of cooking food is during greater than the benchmark heating rate that is preset in the memory cell, fuzzy pressure control unit selects low tension switch as the reference pressure switch; Otherwise fuzzy pressure control unit selects high-voltage switch gear as the reference pressure switch.The measurement of concrete heating rate can be adopted but be not limited to: measuring temperature difference and time difference calculates heating rate; Perhaps measure pressure differential and time difference, pressure differential is converted into temperature difference calculates heating rate afterwards.
The last pressure time that timing unit calculates in the embodiment of the invention can be to begin to be heated to culinary art pressure from electric pressure cooking saucepan to reach the used time of reference pressure, also can be from beginning to reach the used time of reference pressure to culinary art pressure after electric pressure cooking saucepan heats a scheduled time.
Embodiment three:
On the basis of the foregoing description two; The embodiment of the invention also provides a kind of compress control method of electric pressure cooking saucepan; Adopt on the electric pressure cooking saucepan of this method also to comprise the compensatory pressure switch that goal pressure is carried out deviation compensation, the said time-delay heating period is further comprising the steps of: timing unit calculates the incremental time Δ t from the switch motion of reference pressure switch motion to compensatory pressure
0, control device is according to incremental time Δ t
0With the benchmark increment Delta t that is preset in the memory cell
bComparative result correction heating parameter W
mTo reduce to cook the deviation that pressure reaches goal pressure.
The embodiment of the invention increases a compensatory pressure switch that detects compensatory pressure at control device, and compensatory pressure is greater than said reference pressure, under the situation of goal pressure greater than reference pressure; Need carry out pressure control according to the method that embodiment one provides; But, if goal pressure is also greater than compensatory pressure, in order to make the pressure control of electric pressure cooking saucepan more accurate; As shown in Figure 4, carry out pressure controlled adjustment according to following method when specifically realizing:
401, the culinary art pressure of statistics electric pressure cooking saucepan is from reaching reference pressure to the incremental time Δ t that reaches compensatory pressure;
402, in order to confirm whether to reach the effect of anticipation, need and be preset in the benchmark increment Delta t in the electric pressure cooking saucepan with incremental time Δ t in the time-delay heating period
bRelatively, and according to comparative result select corresponding compensation heating parameter Δ W to heating parameter W
mCarry out error compensation.Benchmark increment Delta t in the embodiment of the invention
bBe to reaching the required theoretical required time of compensatory pressure, if Δ t and Δ t from reference pressure
bIdentical, then whether the expression time-delay heating period reaches the effect of anticipation, need not adjust.If Δ t and Δ t
bInequality, then expression does not reach the effect of anticipation, need adjust accordingly, and particularly is exactly: at Δ t than Δ t
bUnder the little situation, carry out 403; At Δ t than Δ t
bUnder the big situation, carry out 404.
403, at Δ t than Δ t
bUnder the little situation; Expression is short from the theoretical time of reference pressure to compensatory pressure actual consumption time ratio; The rate of pressure rise that shows electric pressure cooking saucepan is faster than in theory, so need to shorten the heat time heating time of time-delay heating period or the heating power of the heating period that reduces to delay time.During concrete the realization, the embodiment of the invention need be according to said Δ t and Δ t
bDifference shorten heat time heating time of time-delay heating period, for example: can shorten follow-up heat time heating time according to the ratio of difference and benchmark increase and decrease amount; Perhaps according to said Δ t and Δ t
bDifference reduce the to delay time heating power of heating period, also can reduce actual heating power according to the ratio of difference and benchmark increase and decrease amount.
404, at Δ t than Δ t
bUnder the big situation; Expression is long from the theoretical time of reference pressure to compensatory pressure actual consumption time ratio; The rate of pressure rise that shows electric pressure cooking saucepan is slower than in theory, so the heating power that needs to prolong the heat time heating time of time-delay heating period or increase the time-delay heating period.The embodiment of the invention can be according to said Δ t and Δ t
bDifference prolong heat time heating time of time-delay heating period, as: the ratio according to difference and benchmark increase and decrease amount prolongs follow-up heat time heating time; Or according to said Δ t and Δ t
bDifference increase the heating power of time-delay heating period, as: the ratio according to difference and benchmark increase and decrease amount increases actual heating power.
Adopt after the embodiment of the invention; Owing to increased the compensatory pressure switch that detects compensatory pressure; And under the situation of goal pressure greater than compensatory pressure; Can also be through the delay time adjustment of heating period of the detection of compensatory pressure, thus making that culinary art finishes back culinary art pressure can be more near goal pressure.
The embodiment of the invention is mainly used in various electric pressure cooking saucepans, in electric pressure cooking saucepan or electromagnetism heating voltage power pot.
The above; Be merely the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. an automatic pressure-controlled electric pressure cooking saucepan comprises pot cover, pot body, pot courage, is used to detect and control the control device that culinary art pressure changes; It is characterized in that said control device comprises the reference pressure switch of setting reference pressure and the fuzzy pressure control unit of set target pressure; Culinary art pressure touches the reference pressure switch motion and sends the pressure signal when reaching reference pressure, control culinary art pressure reached goal pressure from reference pressure when fuzzy pressure control unit detected the pressure signal.
2. according to the said automatic pressure-controlled electric pressure cooking saucepan of claim 1; It is characterized in that; Be provided with the induction kettle courage in the said pot body and cooked the displacement induction installation that the pressure effect produces change in displacement; When culinary art pressure reached reference pressure, the displacement induction installation touched the reference pressure switch motion and sends the pressure signal.
3. automatic pressure-controlled electric pressure cooking saucepan according to claim 1 is characterized in that, said fuzzy pressure control unit comprises computing module and selects module.
4. according to the said automatic pressure-controlled electric pressure cooking saucepan of claim 2, it is characterized in that said displacement induction installation comprises the elastic supporting member for supporting optical member that supports the pot courage, the touch pole that reaches shake-up reference pressure switch.
5. according to each said automatic pressure-controlled electric pressure cooking saucepan of claim 1 to 4, it is characterized in that said reference pressure switch is bimetal leaf flash switch or microswitch.
6. compress control method that is applied to each said electric pressure cooking saucepan of claim 1 to 5; It is characterized in that; Said control device also comprises memory cell and timing unit, be preset with in the memory cell be used to control the culinary art pressure reach the required heating parameter sequence W of goal pressure from reference pressure
N, and with heat parameter W
NCorresponding sequence t fiducial time
N, said compress control method comprises that with the next stage order is carried out:
The pressure stage in the heating: the control device startup is heated to the reference pressure switch and sends the pressure signal, and timing unit calculates goes up pressure time t
0
The time-delay heating period: sequence t fiducial time is confirmed in fuzzy pressure control unit
NIn with last pressure time t
0Corresponding t fiducial time
m(m≤n), and select heating parameter sequence W
NIn with t fiducial time
mCorresponding heating parameter W
mTime-delay is heated to goal pressure.
7. the compress control method of electric pressure cooking saucepan according to claim 6 is characterized in that, said control device also comprises the compensatory pressure switch that is used for goal pressure is carried out deviation compensation, and the said time-delay heating period is further comprising the steps of:
Timing unit calculates the incremental time Δ t from the switch motion of reference pressure switch motion to compensatory pressure
0, control device is according to incremental time Δ t
0With the benchmark increment Delta t that is preset in the memory cell
bComparative result correction heating parameter W
mTo reduce to cook the deviation that pressure reaches goal pressure.
8. the compress control method of electric pressure cooking saucepan according to claim 6 is characterized in that, said electric pressure cooking saucepan comprises the pressure switch of the different big or small pressure of a plurality of settings, and the pressure stage is further comprising the steps of in the said heating:
Control device selection control culinary art pressure reaches goal pressure from middle pressure and has the corresponding pressure switch of minimum deviation value as reference pressure switch generation pressure signal.
9. the compress control method of electric pressure cooking saucepan according to claim 8 is characterized in that, said pressure switch comprises low tension switch and high-voltage switch gear, and the pressure stage is further comprising the steps of in the said heating:
The heating rate of said fuzzy pressure control unit judges cooking food, if the heating rate of cooking food is during greater than the benchmark heating rate that is preset in the memory cell, fuzzy pressure control unit selects low tension switch as the reference pressure switch; Otherwise fuzzy pressure control unit selects high-voltage switch gear as the reference pressure switch.
10. according to the compress control method of each described electric pressure cooking saucepan of claim 6 to 9, it is characterized in that said heating parameter is heating power and/or heat time heating time.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103070607A (en) * | 2012-11-08 | 2013-05-01 | 浙江绍兴苏泊尔生活电器有限公司 | Exhaust control method and system for electric heating cooking appliance |
| CN104000473A (en) * | 2014-05-30 | 2014-08-27 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of household electric heating cooking appliance |
| CN104422556A (en) * | 2013-09-02 | 2015-03-18 | 美的集团股份有限公司 | Electric pressure cooker and pressure detecting device and method thereof |
| CN105527999A (en) * | 2015-12-23 | 2016-04-27 | 珠海格力电器股份有限公司 | Temperature control method, device and system for pressure maintaining stage of pressure cooker |
| CN107348831A (en) * | 2017-07-20 | 2017-11-17 | 吴联凯 | A kind of electric cooker and its method for heating and controlling for correcting the heat time |
| CN108497916A (en) * | 2017-02-28 | 2018-09-07 | 佛山市顺德区美的电热电器制造有限公司 | Pressure cooking appliance and pressure-detecting device for pressure cooking appliance |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2253168Y (en) * | 1995-05-23 | 1997-04-30 | 广东美的集团股份有限公司 | Fuzzy logical electric rice pot |
| CN2479867Y (en) * | 2001-04-27 | 2002-03-06 | 简伟文 | Fuzzy logic computer controlled multi-function electric pressure cooker |
| CN2914930Y (en) * | 2006-05-22 | 2007-06-27 | 美的集团有限公司 | Electric pressure cooking utensil |
| US20080142498A1 (en) * | 2006-12-15 | 2008-06-19 | Zhigang He | Multifunction and safe electric pressure cooker |
| JP2010172439A (en) * | 2009-01-29 | 2010-08-12 | Panasonic Corp | Electric pressure cooker |
| CN101930241A (en) * | 2010-08-27 | 2010-12-29 | 九阳股份有限公司 | Safety relief temperature controlled electric pressure cooker and precious voltage controlling method thereof |
| CN201958650U (en) * | 2010-12-24 | 2011-09-07 | 九阳股份有限公司 | Multi-stage pressure adjusting electric pressure cooker and combined type flicker switch thereof |
-
2011
- 2011-10-31 CN CN201110336266.XA patent/CN102429574B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2253168Y (en) * | 1995-05-23 | 1997-04-30 | 广东美的集团股份有限公司 | Fuzzy logical electric rice pot |
| CN2479867Y (en) * | 2001-04-27 | 2002-03-06 | 简伟文 | Fuzzy logic computer controlled multi-function electric pressure cooker |
| CN2914930Y (en) * | 2006-05-22 | 2007-06-27 | 美的集团有限公司 | Electric pressure cooking utensil |
| US20080142498A1 (en) * | 2006-12-15 | 2008-06-19 | Zhigang He | Multifunction and safe electric pressure cooker |
| JP2010172439A (en) * | 2009-01-29 | 2010-08-12 | Panasonic Corp | Electric pressure cooker |
| CN101930241A (en) * | 2010-08-27 | 2010-12-29 | 九阳股份有限公司 | Safety relief temperature controlled electric pressure cooker and precious voltage controlling method thereof |
| CN201958650U (en) * | 2010-12-24 | 2011-09-07 | 九阳股份有限公司 | Multi-stage pressure adjusting electric pressure cooker and combined type flicker switch thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103070607A (en) * | 2012-11-08 | 2013-05-01 | 浙江绍兴苏泊尔生活电器有限公司 | Exhaust control method and system for electric heating cooking appliance |
| CN104422556A (en) * | 2013-09-02 | 2015-03-18 | 美的集团股份有限公司 | Electric pressure cooker and pressure detecting device and method thereof |
| CN104000473A (en) * | 2014-05-30 | 2014-08-27 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of household electric heating cooking appliance |
| CN105527999B (en) * | 2015-12-23 | 2018-11-09 | 珠海格力电器股份有限公司 | Temperature control method, device and system for pressure maintaining stage of pressure cooker |
| CN105527999A (en) * | 2015-12-23 | 2016-04-27 | 珠海格力电器股份有限公司 | Temperature control method, device and system for pressure maintaining stage of pressure cooker |
| CN108497916A (en) * | 2017-02-28 | 2018-09-07 | 佛山市顺德区美的电热电器制造有限公司 | Pressure cooking appliance and pressure-detecting device for pressure cooking appliance |
| CN108497916B (en) * | 2017-02-28 | 2020-11-20 | 佛山市顺德区美的电热电器制造有限公司 | Pressure cooking utensil and be used for pressure cooking utensil's pressure measurement |
| CN109124322A (en) * | 2017-06-16 | 2019-01-04 | 佛山市顺德区美的电热电器制造有限公司 | The control method of pressure cooker |
| CN109124322B (en) * | 2017-06-16 | 2021-09-21 | 佛山市顺德区美的电热电器制造有限公司 | Control method of pressure cooker |
| CN109124331A (en) * | 2017-06-28 | 2019-01-04 | 松下知识产权经营株式会社 | Cooker |
| CN109124331B (en) * | 2017-06-28 | 2021-09-14 | 松下知识产权经营株式会社 | Rice cooker |
| CN107348831A (en) * | 2017-07-20 | 2017-11-17 | 吴联凯 | A kind of electric cooker and its method for heating and controlling for correcting the heat time |
| CN107348831B (en) * | 2017-07-20 | 2020-08-11 | 佛山市顺德区纳邦电器有限公司 | Electric cooker capable of correcting heating time and heating control method thereof |
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Address after: Huaiyin District of Ji'nan City, Shandong Province, 250117 US 999 miles Patentee after: Joyoung Company Limited Address before: Xinsha Road, Huaiyin District of Ji'nan city of Shandong Province, No. 12 250118 Patentee before: Joyoung Company Limited |