CN101112292A - Improved electric pressure cooker - Google Patents
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- CN101112292A CN101112292A CN 200710153850 CN200710153850A CN101112292A CN 101112292 A CN101112292 A CN 101112292A CN 200710153850 CN200710153850 CN 200710153850 CN 200710153850 A CN200710153850 A CN 200710153850A CN 101112292 A CN101112292 A CN 101112292A
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Abstract
The invention provides an improved electric pressure cooker, comprising an outer cooker, an inner cooker, a heating device, an elastic cell, a sealing device, a safety device and a control circuit. Besides, the invention also comprises a capacitance sensor, wherein the capacitance sensor comprises a first polar plate and a second polar plate, the cooker bottom of the inner cooker or electric heating device is the first polar plate, the second polar plate is corresponding to the cooker bottom of the inner cooker or electric heating device, the heating dish is moved upwardly and downwardly by the pressure to change the distance between the second polar plate and the heating dish, then the signal of the capacitance change value is generated and inputted to the control circuit to detect and dispose, thus controlling the electric pressure cooker to work. The invention achieves the real-time detection and control of the pressure. As the pressure is continuous and adjustable, different pressure or working time can be chosen according to the condition of different food during the process of cooking. The capacitance value extra generated due to the capacitance sensor being disturbed by the temperature and the electromagnetic is counteracted by the compensating capacitance greatly, thus ensuring the detection more exact.
Description
Technical field
The present invention relates to a kind of electric pressure cooking saucepan, particularly a kind of electric pressure cooking saucepan of improvement.
Background technology
At present, electric pressure cooking saucepan substitutes existing old-fashioned pressure cooker because it is energy-conservation, advantage fast, easily, becomes one of family kitchen daily electrical home appliance product.The electric pressure cooking saucepan of selling on the existing market is mainly containing three types aspect pressure control and the pressure adjusting.
First type is in the bottom of electric pressure cooking saucepan outer pot one flash switch to be 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 disconnect heater.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 certain value, heating plate moved down and drives feeler lever shake-up flash switch, makes flash switch disconnect heater stop work; After pressure descended, heating plate drove feeler lever and leaves flash switch to top offset, flash switch closure, the work of conducting heater.Reach the purpose of controlled pressure pot internal pressure with this.
The patent No. of announcing as 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 and the pot body that will have sealing ring compress the realization sealing, have 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, a kind of electric pressure cooking saucepan of automatic Regulation is disclosed, comprise pot cover, shell, outer pot, base, heat-generating disc, place the interior pot on the heat-generating disc, elastomer and pressure switch, being provided with elastomer between described heat-generating disc and the outer pot bottom is connected, also be provided with the elastomer distortion on the heat-generating disc and can touch the catch bar of pressure switch, described elastomer is provided with the bearing surface that is connected with heat-generating disc, and be supported on flexible feet on the outer pot bottom, be provided with at least one pair of described elastomer between described heat-generating disc and the 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 value.When cooking different food, can only realize by the length of setting-up time.And different food often needs different force value to realize best cooking effect.As beef, the best of chop or congee culinary art force value is just different.As only coming cooking food by regulating time length, the food of cooking out is relatively poor aspect the nutritional labeling of mouthfeel and reservation.
Second type is the pot cover inside at electric pressure cooking saucepan, corresponding to the top of interior pot temperature sensor or pressure sensor is set, and comes variations in temperature or pressure in the perception pot to change, and signal is inputed to circuit detects control.Quit work when pot inner pressure reaches setting pressure, pressure restarts work when falling after rise.
In this scheme, pressure sensor or temperature sensor must directly contact with the cavity of interior pot, with pressure or the temperature in the pot in the perception.So just make the installation site very limited, owing to interior pot of often taking-up cleaning, the connection of electric wire, the transmission of signal also has problems, so can't directly be arranged in interior pot.Generally all be installed on the pot cover.When interior pan boiling congee or when cooking other foods, a large amount of foams or tiny hard thing can flood or damage sensor, influence the induction sensitivity of sensor, make the sensor can't operate as normal.
For the scheme of serviceability temperature sensor, need to gather earlier kettle temperature, with corresponding temperature transition the force value corresponding with this temperature value, this conversion has a conversion table in the general sense that draws through experiment, sees the following form:
By a large amount of experiments, temperature and pressure have certain corresponding relation, and the temperature of working as water from subordinate list as can be seen surpasses 100 ℃, every increase by 1 degree of temperature, and pressure increases 5kPa.
| Temperature ℃ | 80 | ?90 | ?100 | ?101 | ?102 | ?103 | ?104 | ?105 | ?106 |
| Pressure kPa | ?0 | ?0 | ?0 | ?5 | ?10 | ?15 | ?20 | ?25 | ?30 |
| Temperature ℃ | 107 | ?108 | ?109 | ?110 | ?111 | ?112 | ?113 | ?114 | ?115 |
| Pressure kPa | ?35 | ?40 | ?45 | ?50 | ?55 | ?60 | ?65 | ?70 | ?75 |
Annotate: environment temperature is 25 ℃, 1 standard atmospheric pressure,
The conversion of pointed temperature and pressure is to be 25 degree in environment temperature in the table, and environmental pressure is that 1 normal atmosphere is depressed by a large amount of experiments and drawn.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, because the weight of food, density, the composition difference that contained, also be not quite similar for the requirement of temperature.Also can have influence on the conversion of temperature and pressure.So the force value of temperature correspondence is incomplete same under different environment temperatures, 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.
In addition, adopt the manufacturing cost of pressure or temperature sensor higher, be unfavorable for the popularization of electric pressure cooking saucepan.
The third type is in electric pressure cooking saucepan inside inductance coil to be set, and pot is stressed and changes the inductance value that the displacement that produces changes inductance coil in utilizing, and extracts the inductance value that changes, and carries out judgment processing, comes the pressure of controlled pressure pot with this.
This scheme is that an inductance coil is set below outer pot mostly, at interior pot bottom or heating plate bottom one feeler lever is set.When the electric pressure cooking saucepan inner pot pressure changed, interior pot or heating plate moved up and down, and the drive feeler lever stretches into or stretches out inductance coil, changes inductance value with this, carries out judgment processing according to the inductance value that changes, the work of control electric pressure cooking saucepan.
Because inductance coil self characteristics instability, be vulnerable to the interference of external environment conditions such as temperature, electromagnetism, there is error easily for the detection of pot inner pressure, further influence pressure controlled stability.And in a single day deviation appears in the detection of electric pressure cooking saucepan pressure, unstable, be subject to the interference of environmental factor, it is very big to be easy to occur the pressure cooker actual working pressure, and detected pressure is owing to reasons such as poor stability situation less than normal, can cause the danger of sudden and violent pot, concerning the user, be breakneck.So for such scheme, the interference performance that improves stability and external environmental factors such as resisting temperature, electromagnetism is crucial, this is directly connected to the safe in utilization and user's of electric pressure cooking saucepan safety.
In addition, adopt the cost of inductance coil also higher.
Summary of the invention
In order to solve above-mentioned problems of the prior art, the invention provides a kind of electric pressure cooking saucepan of improvement.Realized the real-time detection and the control of pressure, pressure is adjustable continuously, can select different pressure or working time according to the situation of different foods in the process of culinary art.
The main technical schemes that the present invention adopts is: a kind of electric pressure cooking saucepan of improvement, comprise outer pot, be positioned over interior pot in the described outer pot, in the sealing pot sealing device, with described in pot match be used to heat described in pot electric heater unit, between described electric heater unit and outer pot, be provided with make in pot flexible member, the safety device that reset, and the control circuit of controlling described electric heater unit work, described control circuit comprises capacitance sensor, signal processing circuit and signal controlling output circuit; Described capacitance sensor comprises first pole plate, second pole plate, and the bottom of a pan or the electric heater unit of described interior pot are described first pole plate, second pole plate is corresponding with the described interior pot the bottom of a pan or electric heater unit; Be respectively equipped with the signals collecting end on two pole plates of described capacitance sensor; Described signals collecting end is connected with the signal receiving end of described signal processing circuit; The pot the bottom of a pan or electric heater unit is stressed to change and produces change in displacement in described, change and second pole plate between distance, with this capacitance signal that changes, and this capacitance signal inputed to described signal processing circuit; The signal output part of described signal processing circuit is connected with the signal receiving end of described signal controlling output circuit, and described signal processing circuit is handled the capacitance signal that receives, and the signal after will handling exports described signal controlling output circuit to;
The present invention also adopts following attached technical scheme: described signal controlling output circuit comes control circuit according to the described processing signals that receives, and controls the work of described electric heater unit with this;
Described control circuit also comprises with the capacitance sensor capacitance and is subjected to temperature and electromagnetic interference to change the building-out capacitor of capacitance simultaneously;
Described building-out capacitor comprises two pole plates, and second pole plate in the described capacitance sensor is one of them pole plate, and two pole plates in the described building-out capacitor are installed on respectively on described outer pot bottom or the outer pot sidewall;
Described building-out capacitor comprises two pole plates, and first pole plate in the described capacitance sensor is one of them pole plate, and another pole plate is located on the described electric heater unit;
Described building-out capacitor is set separately in described outer pot.
The beneficial effect that adopts the present invention to bring:
(1) the present invention adopts capacitance sensor, and the variation that pot or heating plate are stressed in utilizing produces displacement, gathers the capacitance that changes, and capacitance is carried out judgment processing, the work of control electric pressure cooking saucepan.The capacitance sensor that the present invention adopts realized capacitance with the variation of pressure real-time change, and set relatively capacitance of benchmark according to the capacitance of real-time change, judge with this whether pressure surpasses the force value that the user sets.The user can be according to the food situation of reality culinary art when the setting benchmark compares capacitance, the scope and the working time of real-time adjustment force value, utilize existing mature C PU control technology, can detect and realize control to multi-parameter information such as pressure, temperature, times, even make the controlling organization of similar electromagnetic oven " PTT " formula, with different food correspondences, realized the adjustable continuously of force value.Set different pressure for different food, better guaranteed the taste and the nutritional labeling of food.
(2) capacitance sensor good stability, the capacitance signal is reliable, the induction precision height.Bring the control of electric pressure cooking saucepan more accurate thus, precision is higher.
(3) the present invention's pole plate that the bottom of a pan or the heating plate of interior pot directly is made as capacitance sensor, the displacement that the variation that pot or heating plate are stressed in utilizing produces forms the capacitance variations value.Displacement is converted to capacitance detects the interior pressure of pot, need not to resemble pressure sensor or temperature sensor and be arranged in the interior pot.Detect reliably, be beneficial to the extraction signal.Simplify the structure, and the interference of cooking food in the pot in can not being subjected to.
(4) the present invention is provided with building-out capacitor on the basis of capacitance sensor, building-out capacitor can respond in real time because the capacitance variations that factors such as temperature, electromagnetic interference produce, calculate by processing of circuit, can compensate the measured value of revising capacitance sensor, make by handling the variation that the measured value that calculates reflects displacement more accurately, be subjected to Effect of Environmental still less, improved pressure controlled accuracy and stability.
(5) capacitance sensor is with low cost, simple in structure, is easy to produce in batches.
Description of drawings
Fig. 1 is the whole cut-away view of first embodiment of the invention; Electric heater unit is shown as a pole plate in the capacitance sensor, other pole plates are by being set up in the outer pot bottom, and capacitance sensor and building-out capacitor are the technical scheme of complex form;
Fig. 2 is the whole cut-away view of second embodiment of the invention; It is a shared pole plate of capacitance sensor and building-out capacitor that electric heater unit is shown, and other pole plates are by being set up in the outer pot bottom, and capacitance sensor and building-out capacitor are the technical scheme of complex form;
Fig. 3 is the whole cut-away view of third embodiment of the invention; Electric heater unit is shown as a pole plate in the capacitance sensor, other pole plates are located on the outer pot sidewall, and capacitance sensor and building-out capacitor are the technical scheme of complex form;
Fig. 4 is the whole cut-away view of fourth embodiment of the invention; Electric heater unit is shown as a pole plate in the capacitance sensor, the technical scheme that building-out capacitor is provided with separately;
Fig. 5 is the upward view of pot cover of the present invention;
Fig. 6 is the A-A cut-away view of Fig. 5, and the structure of pressure limiting valve is shown;
Fig. 7 is the circuit block diagram of control circuit of the present invention;
Fig. 8 is the physical circuit figure of Fig. 7;
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description:
The label of component names correspondence is as follows among the figure:
As shown in Figure 1 to Figure 3, electric pressure cooking saucepan for a kind of improvement provided by the invention, comprise outer pot 1, be positioned over interior pot 2 in the outer pot 1, in the sealing pot 2 sealing device 3, match with interior pot 2 be used to heat in pot 2 electric heater unit 4, between electric heater unit 4 and outer pot 1, be provided with make in pot 2 flexible members that reset 5, safety device 6, and the control circuit of control electric heater unit 4 work, control circuit comprises capacitance sensor 8, signal processing circuit 71 and signal controlling output circuit 72.Capacitance sensor 8 comprises first pole plate, 81, the second pole plates 82, and the bottom of a pan of interior pot 2 or electric heater unit 4 are that first pole plate, 81, the second pole plates 82 are corresponding with interior pot 2 thes bottom of a pan or electric heater unit 4.Be respectively equipped with the signals collecting end on two pole plates of capacitance sensor 8; The signals collecting end is connected with the signal receiving end of signal processing circuit 71; In pot 2 thes bottom of a pan or electric heater unit 4 be stressed to change and produce change in displacement, change and second pole plate 82 between distance, with this capacitance signal that changes, and this capacitance signal inputed to signal processing circuit 71.The signal output part of signal processing circuit 71 is connected with the signal receiving end of signal controlling output circuit 72, and signal processing circuit 71 is handled the capacitance signal that receives, and the signal after will handling exports signal controlling output circuit 72 to.Signal controlling output circuit 72 comes control circuit according to the processing signals that receives, and controls the work of electric heater unit 4 with this.
Control circuit also comprises with capacitance sensor 8 capacitances and is subjected to temperature and electromagnetic interference to change the building-out capacitor 9 of capacitance simultaneously.The present invention is provided with building-out capacitor 9 on the basis of capacitance sensor, building-out capacitor 9 can respond in real time because the capacitance variations that factors such as temperature, electromagnetic interference produce, calculate by processing of circuit, can compensate the measured value of revising capacitance sensor, make by handling the variation that the measured value that calculates reflects displacement more accurately, be subjected to Effect of Environmental still less, improved pressure controlled accuracy and stability.
In each embodiment provided by the invention, electric heater unit 4 is the cast aluminium heating plate, also can be electromagnetic coil assembly, and sealing device 3 is " people " font sealing ring.Safety device 6 comprise as shown in Fig. 5, Fig. 6 pressure limiting valve or etc. the structure of same-action.The effect that safety device 6 of the present invention plays is when electric pressure cooking saucepan work, when pot inner pressure reaches the dangerous pressure value, lays down pot inner pressure and prevents that quick-fried pot is dangerous by outage, mode such as lose heart.The outer ring of pot cover 10 fastens by pot tooth buckle structure and outer pot 1, and inner ring is by chevron shaped sealing ring and 2 pressings mutually of interior pot, pot 2 in the sealing.
Cooperating except above-mentioned said " revolving type " between the pot cover 10 that patent of the present invention relates to and interior pot 2 and the outer pot 1, also " flip-shell " structure.
For the bottom of a pan of interior pot 2 directly as the scheme of first pole plate 81 with second pole plate, the 82 formation capacitance sensors 8 of capacitance sensor 8, need be at the extraction end of the bottom of a pan signalization of interior pot 2, because interior pot 2 needs often to take out to clean, be unsuitable for signalization extraction end on the pot body of interior pot 2, in addition since interior pot 2 in use fit tightly with electric heater unit 4 often, cause electric heater unit 4 to be between the bottom of a pan and second pole plate 82 of interior pot 2 like this, this signals collecting for the capacitance variations value is influential, is unfavorable for the precision and the sensitivity that detect.Owing to have these shortcomings of bringing by the electric pressure cooking saucepan self structure,, in actual production is made, seldom adopt though this scheme is feasible in theory.Describe so only theoretic feasibility is carried out in its enforcement here, do not provide accompanying drawing to describe in addition.
In first embodiment that the present invention provides, building-out capacitor 9 comprises two pole plates, is respectively first pole plate 91 and second pole plate 92.Two pole plates are installed on respectively on outer pot 1 bottom or outer pot 1 sidewall.Second pole plate 82 in the capacitance sensor 8 is building-out capacitor 9 one of them pole plate.
As shown in Figure 1, electric heater unit 4 is first pole plate 81 in the capacitance sensor 8, and second pole plate 82 in the capacitance sensor 8 is a pole plate in the building-out capacitor 9 simultaneously.In the present embodiment, second pole plate 82 of capacitance sensor 8 is same pole plate with second pole plate 92 of building-out capacitor 9.First pole plate 91 in the building-out capacitor 9 is located at the bottom of outer pot 1 by lower carriage 12, and is corresponding with electric heater unit 4.
In second embodiment that the present invention provides, electric heater unit 4 is first pole plate 81 in the capacitance sensor 8, also is a pole plate in the building-out capacitor 9 simultaneously.In the present embodiment, electric heater unit 4 is first pole plate 81 in the capacitance sensor 8 and first pole plate 91 in the building-out capacitor 9, and another pole plate second pole plate of building-out capacitor 9 is located on the electric heater unit 4 by a upper bracket 13.
As shown in Figure 2, second pole plate of building-out capacitor 9 is connected with electric heater unit by upper bracket 13, and second pole plate 82 of capacitance sensor 8 is located at the bottom of outer pot 1 by lower carriage 12.When electric heater unit 4 is stressed when moving up and down, 4 of electric heater units are as first pole plate 81 of capacitance sensor 8 and first pole plate 91 of building-out capacitor 9, second pole plate 92 of being located at the building-out capacitor 9 on the electric heater unit 4 is along with electric heater unit is synchronized with the movement, distance between them is immovable, but first pole plate 81 of capacitance sensor 8 is motions with respect to second pole plate of being located on outer pot 1 bottom 82 really, change the distance between them, produced the capacitance variations value signal.And this signal is inputed in the control circuit of control circuit board 7.
In the 3rd embodiment provided by the invention, as shown in Figure 3, electric heater unit 4 is first pole plate 81 in the capacitance sensor 8, and second pole plate 82 in the capacitance sensor 8 is a pole plate in the building-out capacitor 9.In the present embodiment, second pole plate 82 of capacitance sensor 8 is same pole plate with second pole plate 92 in the building-out capacitor 9, and is installed on the sidewall of outer pot 1.The two ends of first pole plate 91 in the building-out capacitor 9 are located on the sidewall of outer pot 1.
In the 4th embodiment that the present invention provides, as shown in Figure 4,, building-out capacitor 9 is set separately in the bottom of outer pot 1.The two ends of second pole plate 82 of capacitance sensor 8 are fixed on the sidewall of outer pot 1, and electric heater unit 4 is made as first pole plate 81 of capacitance sensor 8.Electric heater unit 4 is stressed and moves up and down, and changes the distance between second floor 82 relative with it, produces the capacitance variations value signal, and inputs to control circuit.The deviation of the capacitance that the building-out capacitor 9 compensation Yin Wendu that are provided with separately, electromagnetic interference etc. occur.
When signal controlling output circuit 712 adopts ghyristor circuit, then adjust the silicon controlled angle of flow according to the signal of input, realize the adjusting of pressure regulation and power output by controllable silicon, reduce the heating power that increases heating plate 4 until disconnecting circuit or closed circuit gradually with the heating power of control heating plate 4 gradually.
Claims (5)
1. the electric pressure cooking saucepan of an improvement, comprise outer pot (1), be positioned over interior pot (2) in the described outer pot (1), in the sealing pot (2) sealing device (3), with described in pot (2) match be used to heat described in pot (2) electric heater unit (4), setting makes flexible member (5), the safety device (6) that interior pot (2) reset between described electric heater unit (4) and outer pot (1), and the control circuit of controlling described electric heater unit (4) work, it is characterized in that:
Described control circuit comprises capacitance sensor (8), signal processing circuit (71) and signal controlling output circuit (72);
Described capacitance sensor (8) comprises first pole plate (81), second pole plate (82), and the bottom of a pan or the electric heater unit (4) of described interior pot (2) they are described first pole plate (81), second pole plate (82) is corresponding with described interior pot (2) the bottom of a pan or electric heater unit (4);
Be respectively equipped with the signals collecting end on two pole plates of described capacitance sensor (8); Described signals collecting end is connected with the signal receiving end of described signal processing circuit (71); Pot (2) the bottom of a pan or electric heater unit (4) is stressed to change and produces change in displacement in described, change and second pole plate (82) between distance, with this capacitance signal that changes, and this capacitance signal inputed to described signal processing circuit (71);
The signal output part of described signal processing circuit (71) is connected with the signal receiving end of described signal controlling output circuit (72), described signal processing circuit (71) is handled the capacitance signal that receives, and the signal after will handling exports described signal controlling output circuit (72) to;
Described signal controlling output circuit (72) comes control circuit according to the described processing signals that receives, and controls the work of described electric heater unit (4) with this.
2. the electric pressure cooking saucepan of a kind of improvement according to claim 1 is characterized in that: described control circuit also comprises with capacitance sensor (8) capacitance and is subjected to temperature and electromagnetic interference to change the building-out capacitor (9) of capacitance simultaneously.
3. the electric pressure cooking saucepan of a kind of improvement according to claim 2, it is characterized in that: described building-out capacitor (9) comprises two pole plates, second pole plate (82) in the described capacitance sensor (8) is one of them pole plate, and two pole plates in the described building-out capacitor (9) are installed on respectively on described outer pot (1) bottom or outer pot (1) sidewall.
4. the electric pressure cooking saucepan of a kind of improvement according to claim 2, it is characterized in that: described building-out capacitor (9) comprises two pole plates, first pole plate (81) in the described capacitance sensor (8) is one of them pole plate, and another pole plate is located on the described electric heater unit (4).
5. the electric pressure cooking saucepan of a kind of improvement according to claim 2 is characterized in that: described building-out capacitor (9) is set separately in described outer pot.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101538505A CN100469290C (en) | 2007-09-14 | 2007-09-14 | Improved electric pressure cooker |
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| CNB2007101538505A CN100469290C (en) | 2007-09-14 | 2007-09-14 | Improved electric pressure cooker |
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| CN101112292A true CN101112292A (en) | 2008-01-30 |
| CN100469290C CN100469290C (en) | 2009-03-18 |
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| WO2009036653A1 (en) * | 2007-09-14 | 2009-03-26 | Joyoung Company Limited | Electrical pressure cooker |
| CN103513679A (en) * | 2012-06-28 | 2014-01-15 | 珠海格力电器股份有限公司 | Pressure control method and device of pressure cooker |
| CN105105619A (en) * | 2015-09-11 | 2015-12-02 | 何志雄 | Heating body elastic supporting structure of mini electric cooker |
| CN108431803A (en) * | 2015-09-28 | 2018-08-21 | 皇家飞利浦有限公司 | Recipe is shared and is adapted to |
| CN109459181A (en) * | 2018-10-12 | 2019-03-12 | 惠州市铂蓝德科技有限公司 | Pressure cooker sensor and its fault self-detection method |
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