CN101930241B - Safety relief temperature controlled electric pressure cooker and precision pressure controlling method thereof - Google Patents
Safety relief temperature controlled electric pressure cooker and precision pressure controlling method thereof Download PDFInfo
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- CN101930241B CN101930241B CN2010102647060A CN201010264706A CN101930241B CN 101930241 B CN101930241 B CN 101930241B CN 2010102647060 A CN2010102647060 A CN 2010102647060A CN 201010264706 A CN201010264706 A CN 201010264706A CN 101930241 B CN101930241 B CN 101930241B
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Abstract
The invention relates to a safety relief temperature controlled electric pressure cooker and a precious voltage controlling method thereof. The temperature controlled electrical pressure cooler comprises a cooker cover, an inner cooker, an outer cooker, an electric heating device and an electric control gear, wherein the cooker cover and the outer cooker can be connected in a detachably fastened mode; the inner cooker can be freely arranged in a cavity formed between the cooker cover and the outer cooker, and a sealing ring is arranged between the inner cooker and the cooker cover; and the cooker cover is provided with an upper temperature detector for detecting the temperature in the inner cooker, an elastic relief device is arranged between the bottom part of the inner cooker and the outer cooker, and the elastic relief device can sense the cooking pressure in the inner cooker so as to drive the inner cooker to move downwards and comprises an elastic member and a strut member for accommodating the elastic member. The precious temperature controlling method comprises a heating stage in which a master controller heats with small power so as to perform temperature compensation based on the temperature deviation deltaT and the reference temperature deltaTB. The invention can improve the temperature control property and voltage control precision of the temperature controlled electric pressure cooker.
Description
Technical field
The present invention relates to culinary cuisine utensil field, especially a kind of can safety relief and accurate Temperature Control Type electric pressure cooking saucepan of pressure control and control method thereof.
Background technology
In recent years, electric pressure cooking saucepan has substituted existing old-fashioned naked light formula pressure cooker because it is energy-conservation, advantage fast, easily, becomes one of family kitchen daily electrical home appliance article.The electric pressure cooking saucepan of selling on the existing market is mainly containing two types aspect pressure control and the pressure adjusting.
First type is pressure controlled electric pressure cooker, in the bottom of electric pressure cooking saucepan outer pot flash switch is set, and the heating plate setting can touch the feeler lever of flash switch break-make.Move up and down with the variation of internal pressure during pot work in utilizing and trigger or break off electric calorifie installation.When electric pressure cooking saucepan was worked, pot inner pressure raise, and heating plate is to bottom offset, and after pot inner pressure was raised to necessarily, heating plate moved down and drives feeler lever shake-up flash switch, and flash switch is broken off, and electric calorifie installation quits work; After pressure descended, heating plate drove feeler lever and leaves flash switch to top offset, and flash switch is closed, the work of conducting electric calorifie installation.Reach the purpose of controlled pressure pot internal pressure with this.
The patent No. of announcing like State Patent Office is: 91100026.7, and Granted publication day is in the patent of invention on June 23rd, 1993, discloses the hermetically sealed automatic electric heating pressure cooking appliance of a kind of family expenses.By rigid arm on the right cylinder and elastic arm, the pot cover that will have O-ring seal compresses with the pot body realizes sealing, has provided the Rational structure of the fully-sealed electric cooker elasticity closing and opening cover during booting of safe ready.Drive adjustable flash switch with elastic arm, control the heated condition of the electric hot plate between the bottom of a pan and the elastic arm, realize the adjustment of electric cooker internal pressure and control automatically, formed the ideal model of fully-sealed electric cooker.
And for example the patent No. of State Patent Office's announcement is: 200420094674.4; Granted publication day is in the utility model patent on January 18th, 2006; Disclose a kind of electric pressure cooking saucepan of automatic Regulation, comprised pot cover, shell, outer pot, base, heat-generating disc, place interior pot, elastic body and pressure switch on the heat-generating disc, be provided with elastic body between said heat-generating disc and the outer pot bottom and be connected; Also be provided with the elastic body distortion on the heat-generating disc and can touch the catch bar of pressure switch; Said elastic body is provided with the bearing surface that is connected with heat-generating disc, and is supported on the flexible feet on the outer pot bottom, and said heat-generating disc is provided with at least one pair of described elastic body with asking of outer pot bottom.Pressure when utilizing electric pressure cooking saucepan work changes, and heating plate moves up and down, and drives catch bar and triggers pressure switch, the work of controlled pressure pot.
The problem that the electric pressure cooking saucepan of the type exists is that pressure is unadjustable, is a fixed pressure.When the culinary art different food, can only realize through the length of setting-up time.And different food often needs different pressure to realize best cooking effect.Like beef, the best of chop or congee culinary art pressure is just different.As only coming cooking food through regulating time length, the food of cooking out is relatively poor aspect the nutritional labeling of mouthfeel and reservation.
Second type is the Temperature Control Type electric pressure cooking saucepan, is inner at the pot cover of electric pressure cooking saucepan, corresponding to the top of interior pot temperature sensor or pressure transducer is set, and comes temperature variation or pressure in the perception pot to change, and signal is inputed to circuit detects control.When pot inner pressure reaches set pressure, quit work, pressure restarts work when falling after rise.
For the scheme of serviceability temperature sensor, need to gather earlier kettle temperature, with corresponding temperature transition the pressure corresponding with this temperature; This conversion has a conversion table in the general sense that draws through experiment; See the following form: through a large amount of experiments, temperature and pressure have certain corresponding relation, can find out that from subordinate list the temperature of working as water is above 100 ℃; Every increase by 1 degree of temperature, pressure increases 5kPa.
| Temperature/℃ | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 |
| Pressure/kPa | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 |
| Temperature/℃ | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 |
| Pressure/kPa | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 |
Annotate: 25 ℃ of environment Wen Fanwei, 1 standard atmospheric pressure, food are that water and capacity are 80%.
The conversion of pointed temperature and pressure is to be 25 degree in environment temperature in the table, and environmental pressure is the inside and outside differential pressure that 1 normal atmosphere is depressed the pot courage that draws through a large amount of experiments.When environment temperature changes, or environment atmospheric pressure is because during different rather than standard atmospheric pressure of physical features, this corresponding conversion table is inaccurate.In addition, for temperature sensor,, also be not quite similar for the requirement of temperature because the weight of food, density, the composition that contained are different.Also can have influence on the conversion of temperature and pressure.So the corresponding pressure of temperature is incomplete same under different environment temperature, environment atmospheric pressure and food.The result who directly causes detects exactly and error occurs, and precision and sensitivity descend significantly.And then influence effective control of pressure.In case the detection and the control of pressure lose accuracy, will increase the danger coefficient that electric pressure cooking saucepan uses, be unsafe for the user.
Summary of the invention
In order to solve the technical matters that above-mentioned prior art exists, but the present invention provides a kind of safety relief, and has realized that pressure implements to detect and control, and pressure is adjustable continuously, Temperature Control Type electric pressure cooking saucepan that the pressure control precision is high and accurate pressure control method thereof.
The technical scheme that the present invention adopts is:
A kind of Temperature Control Type electric pressure cooking saucepan of safety relief comprises pot cover, pot courage, outer pot, electric calorifie installation and electric control gear; Be detachable being fastened and connected between said pot cover and the outer pot, said pot courage freely is placed in the cavity that forms between pot cover and the outer pot, and is provided with O-ring seal between pot courage and the pot cover; Said pot cover is provided with the last thermal detector that detects temperature in the pot courage; Be provided with between the bottom of said pot courage and the outer pot and can experience culinary art pressure in pot courage and drive the elasticity pressure relief device that pot courage moves down, said elasticity pressure relief device comprises elastic component and the support member of placing elastic component.
Technique scheme can also be further perfect through following technical measures:
Said electric calorifie installation is an electric hot tray, said electric hot tray closely contact with pot courage bottom and supported underneath on the elasticity pressure relief device.The said thermal detector of going up comprises that inside is provided with the metal thermometric post and the temperature sensor that is located in the aforementioned cavity of cavity, and said temperature sensor and electric control gear are electrically connected.Housing comprises drum shape metal outer pot and shell, and said electric calorifie installation, elasticity pressure relief device are installed in the bottom of outer pot successively.Said electric control gear comprises master controller and compensation memory, is preset with reference temperature T in the said compensation memory
BThe bottom of said outer pot is equipped with detects the displacement detection switch of pot courage to bottom offset, and said electric calorifie installation or elastic component are provided with the touch part that can touch the displacement detection switch action.Be provided with the following thermal detector that detects pot courage temperature in the said outer pot, said thermal detector down contacts with pot courage elastic tight, and pot cover is provided with presses detection device.The said detection device of go up pressing comprises that magnetosensitive switch and induction go up the float-actuated valve of pressing signal, is equipped with on the floating core of said float-actuated valve to go up the magnetite that can touch the magnetosensitive switch motion after pressing in the pot, and said magnetosensitive switch is electrically connected with master controller.
The invention still further relates to a kind of accurate pressure control method of application of aforementioned Temperature Control Type electric pressure cooking saucepan, comprise the heat temperature raising stage, the said heat temperature raising stage may further comprise the steps:
Steps A: said master controller heats with high-power by setting cooking process driving electric calorifie installation, and the real-time temperature T that thermal detector detects temperature measurement location is gone up in control
D
Step B: said touch part touches the displacement detection switch action and sends pressure signal to master controller under the effect of culinary art pressure, said master controller is ended to carry out and set cooking process, and the logging program breakpoint also calculates real-time temperature T
DWith reference temperature T
BActual deviation Δ T;
Step C: said master controller is with actual deviation Δ T and be preset in the datum drift Δ T in the compensation memory
BCompare, if Δ T≤Δ T
BThe time, execution in step E then, otherwise execution in step D;
Step D: said master controller drives electric calorifie installation and carries out temperature compensation with the miniwatt heating, the real-time temperature T of its temperature measurement location of thermal detector feedback in the control
D, and calculate real-time temperature T
DWith reference temperature T
BActual deviation Δ T after execution in step C;
Step e: said master controller begins to continue to carry out aforementioned setting cooking process from program breakpoint and drives electric calorifie installation work.
Be preset with actual deviation Δ T in the said compensation memory with N grade
1～Δ T
NThe heating power of corresponding different brackets, step D also comprises the steps:
Step D
0: master controller is earlier with actual deviation Δ T and Δ T
1～Δ T
NCompare successively, T is not less than Δ T when the actual deviation Δ
m, and less than Δ T
M+1The time, master controller is according to the actual deviation Δ T of m grade
mCorresponding heating power driving electric calorifie installation carries out the miniwatt heating and carries out temperature compensation, wherein, and 1≤m≤N-1.
Said reference temperature T
BBe 104 ℃, said datum drift Δ T
BIt is 0.5 ℃.
Above-mentioned accurate pressure control method of the present invention can also adopt another kind of technical measures to realize:
A kind of accurate pressure control method of Temperature Control Type electric pressure cooking saucepan comprises the heat temperature raising stage, and the said heat temperature raising stage may further comprise the steps:
Step F: said master controller heats with high-power by setting cooking process driving electric calorifie installation, and control is the real-time temperature T of thermal detector detection temperature measurement location down
0
Step G: said master controller is with real-time temperature T
0With the reference temperature T that is stored in the preset storer
BCompare, work as T
0>=T
BThe time, execution in step H; As T＜T
BThe time, continue execution in step F;
Step H: said master controller drives electric calorifie installation and heats with miniwatt, when last pressure detection device sends the pressure signal, and execution in step I;
Step I: the main controller controls electric calorifie installation stops the miniwatt heating and carries out temperature compensation, works on by setting cooking process.
Said reference temperature T
BIt is 95 ℃.
Owing to adopted technique scheme, the present invention to have following useful technique effect:
1, owing to being provided with at temperature-detecting device, the pot courage bottom at the Temperature Control Type electric pressure cooking saucepan lost efficacy; Pressure increases to the elasticity pressure relief device that can play protection after the dangerous pressure; Effectively overcome Temperature Control Type electric pressure cooking saucepan in the prior art and can't realize the defective of safety relief protection, largely improved the security performance of Temperature Control Type electric pressure cooking saucepan, realized the pressure step-less adjustment of electric pressure cooking saucepan; Make different foods can adopt the different pressures culinary art; Significantly improve the mouthfeel of food, eliminated the security performance defective of Temperature Control Type electric pressure cooking saucepan again, more helped the marketing of electric pressure cooking saucepan.
2, accurate pressure control method of the present invention is owing to set a reference temperature T
B, the temperature when this reference temperature is moved corresponding to normality bottom offset detector switch in the pot courage, when this electric pressure cooking saucepan was in different working environments, when displacement detection switch moved, last thermal detector detected real-time temperature T
DWith reference temperature T
BHave deviation delta T, master controller is with deviation delta T and be preset in temperature compensation storer datum drift Δ T
B, as Δ T>=Δ T
BThe time, master controller carries out the miniwatt heating, and it is constant to keep pot courage pressure; And increase the temperature (reduce steam acting and with heat exchange with outside balance) of steam above the food gradually, after the vapor (steam) temperature of treating the top is stablized with the pressure coupling, carry out high-power heating cooking again; Temperature and pressure more approaches the linear relationship under the normality, and the pressure regulation in later stage is also more accurate, and this kind pressure control method significantly reduces under the abnormal working environment; The deviation of temperature and pressure; Improved electric pressure cooking saucepan in different regions, the accuracy of pressure control on the different food capacity can adapt to using and promoting of domestic each region people.
In addition, grope through long-term experiment, the present invention also is divided into some grades with deviation delta T, and corresponding different grade adopts different heating powers to carry out temperature compensation, can improve the efficient and the precision of temperature compensation, further improves the pressure control precision.
3, the another kind of accurately pressure control method that adopts of the present invention be in housing, to be provided with and the temperature of the accurate following thermal detector that contacts of pot courage elasticity in order to detection pot courage; On float-actuated valve does not send, press the deviation of food actual temperature in temperature that miniwatt heating before the signal eliminates the thermal detector temperature measurement location and the pot courage make when pressing on thermal detector detect temperature for the actual temperature in the pot courage, press the back to adopt normal power to heat and go up.This control method can effectively overcome in the water yield of food seldom the time; After pressing in pot; Because the thermal inertia of electric hot tray, the pressure in the pot raises rapidly, and temperature sensor since in inertia and top vapor (steam) temperature deficiency and detected temperatures and the pot courage actual temperature deviation of food very big; This moment, pressure was in runaway condition, caused security incident and the also not good defective of culinary art effect easily.This kind method has thoroughly solved, and the food that water cut is few is broken through fast on the pressure of last pressure back, the problem that the pressure control precision is low.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further specific descriptions:
Fig. 1 is the one-piece construction synoptic diagram of Temperature Control Type electric pressure cooking saucepan of the present invention;
Fig. 2 is the zoomed-in view at A place among Fig. 1;
Fig. 3 is the assembling synoptic diagram of pressure relief device;
Fig. 4 is the zoomed-in view at B place among Fig. 3;
Fig. 5 is the structural representation of the elastic component of elasticity pressure relief device;
Fig. 6 is the control flow chart of first kind of embodiment of accurate pressure control method of the present invention;
Fig. 7 is the food temperature of first kind of embodiment of accurate pressure control method, upward presses in thermal detector temperature, the pot
The curve map of power and heating power;
Fig. 8 is the curve map of food temperature, pot inner pressure and heating power of first kind of embodiment of accurate pressure control method;
Reference numeral:
1, pot cover; 2, housing; 3, electric hot tray; 4, go up thermal detector; 5, following thermal detector; 6, flash switch; 7, elasticity pressure relief device; 8, outer pot; 9, pot courage; 10, O-ring seal; 41, temperature sensor; 42, thermometric post; 71, elastic component; 72, support member.
Embodiment
The Temperature Control Type electric pressure cooking saucepan of a kind of safety relief shown in Fig. 1-5 comprises pot cover 1, pot courage 9, housing 2, electric calorifie installation and electric control gear; Housing 2 comprises drum shape metal outer pot 8 and shell, is between pot cover 1 and the outer pot 8 detachable being fastened and connected to be processed with and to cover tooth on the pot cover 1; Be processed with a pot tooth on the outer pot 8, rotation pot cover 1, the lid tooth can be realized separating or fastening with the pot tooth; During culinary art, pot cover 1 and outer pot 8 are fastened, culinary art finishes; When opening pot cover 1, only need rotation pot cover 1 just can realize separating of pot tooth and Gai Ya, see the revolving type split electric pressure cooking saucepan of prior art for details.Pot courage 9 freely is placed in the cavity that forms between pot cover 1 and the outer pot 8, and is provided with O-ring seal 10 between pot courage 9 and the pot cover 1, and O-ring seal 10 is a lip, simultaneously pot courage 9 and pot cover 1 is sealed, and between the two, forms the pressure cooking chamber; Pot cover 1 is provided with the last thermal detector 4 that detects temperature in the pot courage 9, and last thermal detector 4 is installed in the middle part of pot cover 1, is used to detect the temperature in pot courage 9.Be equipped with between bottom and the outer pot 8 of pot courage 9 and can experience culinary art pressure in pot courage 9 and drive the elasticity pressure relief device 7 that pot courage 9 moves down, elasticity pressure relief device 7 comprises elastic component 71 and the support member 72 of placing elastic component 71.
Electric calorifie installation is an electric hot tray 3; Electric hot tray 3 closely contact with pot courage 9 bottoms and supported underneath on elasticity pressure relief device 7; In this embodiment, elasticity pressure relief device 7 comprises 3 groups of elastic components 71 and support member 72, and elastic component 71 is supported on the support member 72 and forms elastic construction; The bottom of electric hot tray 3 is one-body molded to have 3 pillars; Pillar is pressed in the middle part of elastic component 71, and elastic component 71 can produce elastic displacement with the pressure variation of pillar to be changed, and electric hot tray, elasticity pressure relief device 7 are installed in the bottom of outer pot 8 successively.Last thermal detector 4 comprises that inside is provided with the metal thermometric post 41 and the temperature sensor 42 that is located in the aforementioned cavity of cavity, and thermometric post 41 stretches in the culinary art cavity that forms between pot courage 9 and the pot cover 1, and temperature sensor 42 is electrically connected with electric control gear.Electric control gear comprises master controller and compensation memory, is preset with reference temperature T in the compensation memory
B, reference temperature T
BBe when displacement detection switch 6 action, last thermal detector 4 detected kettle temperatures (test condition is: 1 standard atmospheric pressure, 25 degrees centigrade of room temperatures, cooking food are water, capacity be nominal capacity 80%).The bottom of housing 2 is equipped with detects the displacement detection switch 6 of pot courage 9 to bottom offset, and this displacement detection switch is flash switch commonly used.Electric hot tray 3 is provided with the touch part that can touch displacement detection switch 6 actions, after displacement detection switch 6 reaches set pressure, sports off-state by closure state, sends pressure signal to master controller.Be provided with the following thermal detector 5 that detects pot courage 9 temperature in the housing 2; Following thermal detector 5 contacts with pot courage 9 elastic tight; Be located at the bottom of pot courage 9 in this embodiment; Be used to detect the temperature of pot courage 9 bottom outer wall, in the early stage in heat temperature raising stage, there is certain linear in the temperature of food with the temperature of pot courage 9 outer walls in the pot.Also be equipped with on the pot cover 1 and press detection device.Last pressure detection device comprises the magnetosensitive switch and responds to the float-actuated valve of going up the pressure signal, and the magnetite that can touch the magnetosensitive switch motion after upward pressing in the pot is installed on the floating core of float-actuated valve, and the magnetosensitive switch is electrically connected with master controller.
In addition in the above-described embodiment, the touch part of shake-up displacement detection switch 6 also can be arranged on the elastic component 41.
When above-mentioned Temperature Control Type electric pressure cooking saucepan was worked, last temperature controller 4 was used to detect the temperature in pot courage 9, and master controller is regulated the food temperature in the pot through the heating power of control electric hot tray 3, thus the purpose of realization stepless voltage regulation.Elasticity pressure relief device 7 then is used to ensure the security performance of electric pressure cooking saucepan, after going up pressure in the pot, along with the increase of culinary art pressure; Pot courage 9 compressing elasticity pressure relief devices 7 produce elastic deformation, and pot courage 9 moves down the generation displacement, and the seal clearance between pot courage 9 and the pot cover 1 increases; The sealing surface of lip-type packing 10 reduces gradually; When the pressure in the pot surpassed safe pressure (safe pressure is 2-3.5 times of rated operating pressure normally), the 9 downward displacements of pot courage increased to the sealing surface that can destroy lip-type packing fully, the seal failure between pot courage 9 and the pot cover 1; Steam is from releasing between the two; Vapor pressure reduces in the pot, plays the effect of safety relief, can effectively protect user's life safety.
In the above-described embodiment, elastic component 71 is the dish spring, and support member 72 is a dish spring supporting seat; Supporting seat is installed in the bottom of outer pot 8; Certainly elastic component can also be other mode, and like elastic plate, elastic sheet metal etc., support member also can be provided in a side of the circular step of outer pot 8 bottoms; The boss that perhaps outer pot bottom reverse-drawing forms, leg, ring muscle etc., support member are to adapt to the support of elastic component and be provided with.
A kind of embodiment of the accurate pressure control method of application of aforementioned Temperature Control Type electric pressure cooking saucepan as shown in Figure 6 comprises the heat temperature raising stage, and the said heat temperature raising stage may further comprise the steps:
Steps A: said master controller heats with high-power by setting cooking process driving electric hot tray, and the real-time temperature T that thermal detector 4 detects temperature measurement locations is gone up in control
D
Step B: said touch part touches displacement detection switch 6 actions and sends pressure signal to master controller under the effect of culinary art pressure, said master controller is ended to carry out and set cooking process, and the logging program breakpoint also calculates real-time temperature T
DWith reference temperature T
BActual deviation Δ T;
Step C: said master controller is with actual deviation Δ T and be preset in the datum drift Δ T in the compensation memory
BCompare, if Δ T≤Δ T
BThe time, execution in step E then, otherwise execution in step D;
Step D: may further comprise the steps
Step D
0: master controller is earlier with actual deviation Δ T and Δ T
1～Δ T
NCompare successively, T is not less than Δ T when the actual deviation Δ
m, and less than Δ T
M+1The time, master controller is according to the actual deviation Δ T of m grade
mCorresponding heating power driving electric hot tray carries out the miniwatt heating and carries out temperature compensation, wherein, and 1≤m≤N-1;
The real-time temperature T of thermal detector 4 its temperature measurement locations of feedback on the main controller controls
D, and calculate real-time temperature T
DWith reference temperature T
BActual deviation Δ T after execution in step C;
Step e: said master controller begins to continue to carry out aforementioned setting cooking process from program breakpoint and drives electric hot tray work.
Be preset with actual deviation Δ T in the said compensation memory with N grade
1～Δ T
NThe heating power of corresponding different brackets, step D also comprises the steps:
The said reference temperature T
BBe 104 ℃ (corresponding 1.2 standard atmospheric pressures), said datum drift Δ T
BIt is 0.5 ℃.
As can be seen from Figure 7; In the above-mentioned accurate pressure control method, after food reached boiling point in pot, quantity of steam significantly increased; Float-actuated valve rises; Form the pressure cooking chamber of sealing between pot cover 1 and the pot courage 9, from figure, can find out in the pressure history reach boiling point after pot inner pressure raise gradually, when arriving reference temperature T
BThe time; After pressure in pot reached the pressure of displacement detection switch setting, pot courage 9 promoted electric hot traies 3 and moves downward, and the touch part promotion displacement detection switch action that is located on the electric hot tray 3 is sent pressure signal to master controller; Master controller detects the temperature of point for measuring temperature through last thermal detector 4; By finding out among the figure, the temperature of point for measuring temperature exists tangible deviation, reference temperature T with the temperature of the interior food of pot
BThere is deviation delta T in the place, and master controller is with the datum drift Δ T of Δ T and pre-programmed at this moment
BCompare, if Δ T≤Δ T
B, explain deviations can adopt original program to continue heating, if Δ T ﹥ Δ T in the reasonable scope
B, then explain deviations is excessive, need do temperature compensation; Master controller drives electric calorifie installation and changes the miniwatt heating into, adopts the heating of 1/3 rated power in this embodiment, and the miniwatt heating can keep the pressure in the pot basicly stable constant; Can improve the temperature of pot interior steam gradually; Along with the raising of vapor (steam) temperature in the pot, it is also identical gradually that last thermal detector detects in temperature and the pot temperature of food, when the deviation between the two at datum drift Δ T
BIn the time of in the scope, master controller reads the original program breakpoint succession and carries out original program, and as can be seen from Figure 7, behind the balance of steam in the pot, pressure history and temperature variation curve are linear change between the two.
In order to carry out the miniwatt heating period; Guarantee more accurately pot inner pressure be stabilized in one among a small circle in, in the above-mentioned embodiment temperature deviation value Δ T has been carried out classification, be divided into 3 grades in this embodiment; Δ T drops in the different stage scope; Electric hot tray 3 just adopts different heating power, can advance a stability that improves pressure, improves the accuracy of follow-up pressure control.
The another kind of embodiment of the accurate pressure control method of application of aforementioned Temperature Control Type electric pressure cooking saucepan as shown in Figure 8 comprises the heat temperature raising stage, and the said heat temperature raising stage may further comprise the steps:
Comprise the heat temperature raising stage, it is characterized in that the said heat temperature raising stage may further comprise the steps:
Step F: said master controller heats with high-power by setting cooking process driving electric calorifie installation, and control is the real-time temperature T of thermal detector detection temperature measurement location down
0
Step G: said master controller is with real-time temperature T
0With the reference temperature T that is stored in the preset storer
BCompare, work as T
0>=T
BThe time, execution in step H; As T＜T
BThe time, continue execution in step F;
Step H: said master controller drives electric calorifie installation and carries out temperature compensation with the miniwatt heating, when last pressure detection device sends the pressure signal (float-actuated valve touches the magnetosensitive switch and sends the pressure signal), and execution in step I;
Step I: the main controller controls electric calorifie installation stops the miniwatt heating, works on by setting cooking process.
Said reference temperature T
BIt is 95 ℃.
The principle of this embodiment is, when some special foods of culinary art, the water yield that needs is seldom the time, goes up in the pot and presses back pressure to dash on fast, just accurately controls very difficulty again, therefore adopted above-mentioned pressure control method, i.e. setting reference temperature T before last pressure
BBegin to adopt the miniwatt heating,, after last pressure, adopt the pressure control method of high-power heating again, played the purpose of accurate pressure control equally to increase the vapour concentration and the temperature of food top.
Those of ordinary skill in the art should know; Above-mentioned embodiment only is to optimize embodiment to one of the present invention; Be not of the present invention all, it is identical or be equal to embodiment and all should belong in protection scope of the present invention that mode conversions such as any characteristics combination of doing based on above-mentioned embodiment, decomposition form.
Claims (12)
1. the Temperature Control Type electric pressure cooking saucepan of a safety relief comprises pot cover, pot courage, outer pot, electric calorifie installation and electric control gear; Be detachable being fastened and connected between said pot cover and the outer pot, said pot courage freely is placed in the cavity that forms between pot cover and the outer pot, and is provided with O-ring seal between pot courage and the pot cover; Said pot cover is provided with the last thermal detector that detects temperature in the pot courage; It is characterized in that; Be provided with between the bottom of said pot courage and the outer pot and can experience culinary art pressure in pot courage and drive the elasticity pressure relief device that pot courage moves down, said elasticity pressure relief device comprises elastic component and the support member of placing elastic component.
2. the Temperature Control Type electric pressure cooking saucepan of safety relief according to claim 1 is characterized in that, said electric calorifie installation is an electric hot tray, said electric hot tray closely contact with pot courage bottom and supported underneath on the elasticity pressure relief device.
3. the Temperature Control Type electric pressure cooking saucepan of safety relief according to claim 2 is characterized in that, the said thermal detector of going up comprises that inside is provided with the metal thermometric post and the temperature sensor that is located in the aforementioned cavity of cavity, and said temperature sensor and electric control gear are electrically connected.
4. according to the Temperature Control Type electric pressure cooking saucepan of each described safety relief of claim 1 to 3, it is characterized in that said electric control gear comprises master controller and compensation memory, be preset with reference temperature T in the said compensation memory
B
5. the Temperature Control Type electric pressure cooking saucepan of safety relief according to claim 4; It is characterized in that; The bottom of said outer pot is equipped with detects the displacement detection switch of pot courage to bottom offset, and said electric calorifie installation or elastic component are provided with the touch part that can touch the displacement detection switch action.
6. according to the Temperature Control Type electric pressure cooking saucepan of each described safety relief of claim 1 to 3; It is characterized in that; Be provided with the following thermal detector that detects pot courage temperature in the said outer pot, said thermal detector down contacts with pot courage elastic tight, and pot cover is provided with presses detection device.
7. the Temperature Control Type electric pressure cooking saucepan of safety relief according to claim 6; It is characterized in that; The said pressure detection device of going up comprises the magnetosensitive switch and responds to the float-actuated valve of upward pressing signal; The magnetite that can touch the magnetosensitive switch motion after upward pressing in the pot is installed on the floating core of said float-actuated valve, and said magnetosensitive switch is electrically connected with master controller.
8. an accurate pressure control method that is applied to the described Temperature Control Type electric pressure cooking saucepan of claim 5 comprises the heat temperature raising stage, it is characterized in that the said heat temperature raising stage may further comprise the steps:
Steps A: said master controller heats with high-power by setting cooking process driving electric calorifie installation, and the real-time temperature T that thermal detector detects temperature measurement location is gone up in control
D
Step B: said touch part touches the displacement detection switch action and sends pressure signal to master controller under the effect of culinary art pressure, said master controller is ended to carry out and set cooking process, and the logging program breakpoint also calculates real-time temperature T
DWith reference temperature T
BActual deviation Δ T;
Step C: said master controller is with actual deviation Δ T and be preset in the datum drift Δ T in the compensation memory
BCompare, if Δ T≤Δ T
BThe time, execution in step E then, otherwise execution in step D;
Step D: said master controller drives electric calorifie installation and carries out temperature compensation with the miniwatt heating, the real-time temperature T of its temperature measurement location of thermal detector feedback in the control
D, and calculate real-time temperature T
DWith reference temperature T
BActual deviation Δ T after execution in step C;
Step e: said master controller begins to continue to carry out aforementioned setting cooking process from program breakpoint and drives electric calorifie installation work.
9. the accurate pressure control method of Temperature Control Type electric pressure cooking saucepan according to claim 8 is characterized in that, is preset with the actual deviation Δ T with N grade in the said compensation memory
1～Δ T
NThe heating power of corresponding different brackets, step D also comprises the steps:
Step D
0: master controller is earlier with actual deviation Δ T and Δ T
1～Δ T
NCompare successively, T is not less than Δ T when the actual deviation Δ
m, and less than Δ T
M+1The time, master controller is according to the actual deviation Δ T of m grade
mCorresponding heating power driving electric calorifie installation carries out the miniwatt heating and carries out temperature compensation, wherein, and 1≤m≤N-1.
10. according to Claim 8 or the accurate pressure control method of 9 described Temperature Control Type electric pressure cooking saucepans, it is characterized in that said reference temperature T
BBe 104 ℃, said datum drift Δ T
BIt is 0.5 ℃.
11. an accurate pressure control method that is applied to claim 6 or 7 described Temperature Control Type electric pressure cooking saucepans comprises the heat temperature raising stage, it is characterized in that the said heat temperature raising stage may further comprise the steps:
Step F: said master controller heats with high-power by setting cooking process driving electric calorifie installation, and control is the real-time temperature T of thermal detector detection temperature measurement location down
0
Step G: said master controller is with real-time temperature T
0With the reference temperature T that is stored in the preset storer
BCompare, work as T
0>=T
BThe time, execution in step H; Work as T<t
BThe time, continue execution in step F;
Step H: said master controller drives electric calorifie installation and carries out temperature compensation with the miniwatt heating, when last pressure detection device sends the pressure signal, and execution in step I;
Step I: the main controller controls electric calorifie installation stops the miniwatt heating, works on by setting cooking process.
12. the accurate pressure control method of Temperature Control Type electric pressure cooking saucepan according to claim 11 is characterized in that said reference temperature T
BIt is 95 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102647060A CN101930241B (en) | 2010-08-27 | 2010-08-27 | Safety relief temperature controlled electric pressure cooker and precision pressure controlling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102647060A CN101930241B (en) | 2010-08-27 | 2010-08-27 | Safety relief temperature controlled electric pressure cooker and precision pressure controlling method thereof |
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| Publication Number | Publication Date |
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| CN101930241A CN101930241A (en) | 2010-12-29 |
| CN101930241B true CN101930241B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102647060A Active CN101930241B (en) | 2010-08-27 | 2010-08-27 | Safety relief temperature controlled electric pressure cooker and precision pressure controlling method thereof |
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| CN102293585B (en) * | 2011-09-09 | 2014-01-22 | 浙江绍兴苏泊尔生活电器有限公司 | Cover of electric pressure cooker |
| CN103494510B (en) * | 2011-09-09 | 2016-09-07 | 浙江绍兴苏泊尔生活电器有限公司 | Cover of electric pressure cooker |
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| CN102283570A (en) * | 2011-09-09 | 2011-12-21 | 浙江绍兴苏泊尔生活电器有限公司 | Cover of electric pressure cooker |
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| CN113143001B (en) * | 2020-01-07 | 2023-03-14 | 佛山市顺德区美的电热电器制造有限公司 | Pan and cooking equipment |
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| CN101930241A (en) | 2010-12-29 |
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Address after: Huaiyin District of Ji'nan City, Shandong Province, 250118 US 999 miles Patentee after: JOYOUNG Co.,Ltd. Address before: Xinsha Road, Huaiyin District of Ji'nan city of Shandong Province, No. 12 250118 Patentee before: JOYOUNG Co.,Ltd. |