CN114766905B - Control method of pressure cooking appliance - Google Patents
Control method of pressure cooking appliance Download PDFInfo
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- CN114766905B CN114766905B CN202210272013.9A CN202210272013A CN114766905B CN 114766905 B CN114766905 B CN 114766905B CN 202210272013 A CN202210272013 A CN 202210272013A CN 114766905 B CN114766905 B CN 114766905B
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- 238000010411 cooking Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 238000010586 diagram Methods 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000009499 grossing Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000009246 food effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/0802—Control mechanisms for pressure-cookers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/09—Safety devices
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
Abstract
The invention discloses a control method of a pressure cooking appliance, which belongs to the field of kitchen appliances and solves the problem that the opening and closing states of a pressure switch cannot be detected after the pressure cooking appliance adopts a full-bridge rectifying module. A pressure detection module, a temperature detection module and a relay; the control method comprises the following steps: s10, detecting the temperature T of the inner container through a temperature detection module, after the temperature T of the inner container reaches a preset range T A～TC, executing the step S20, and if T is more than T C, executing the step S30; s20, the relay is disconnected, the pressure detection module detects the opening and closing state of the pressure switch and outputs a waveform chart, and the waveform chart is analyzed to obtain the current opening and closing state of the pressure switch; s30, the relay is opened, and heating of the inner container is stopped.
Description
[ Field of technology ]
The invention relates to the field of kitchen appliances, in particular to a control method of a pressure cooking appliance.
[ Background Art ]
When the pressure cooking appliance cooks food materials, internal liquid is boiled along with the increase of temperature to generate steam, and the steam is limited in the appliance to continuously increase the pressure and the temperature, so that the function of pressing the food materials is realized. If the pressure in the pressure cooking appliance is too high, explosion may occur, so when the pressure reaches a certain level, the heating needs to be stopped, the internal temperature is gradually reduced to lower the pressure, and the heating and pressurizing are restarted. The temperature and the pressure are related to each other, at present, the pressure cooker converts the pressure into a corresponding temperature point by using the temperature detection of the bottom sensor and the cover sensor, when the temperature point reaches a required value, namely the pressure reaches a rated value, and then a program control relay stops heating. In general, a mechanical pressure switch is utilized in a pressure cooking appliance, the pressure switch is judged to be disconnected through a waveform diagram of the opening and closing states of the output pressure switch of a pressure switch detection module, the cost of the pressure cooking appliance can be reduced by reducing the capacitance value of a smoothing capacitor, and in order to ensure that the pressure cooking appliance can normally work, a half-bridge rectifying circuit is changed into a full-bridge rectifying module, so that the pressure switch detection module is influenced and the opening and closing states of the pressure switch cannot be judged through the waveform diagram.
[ Invention ]
The invention aims to solve the technical problems that the control method of the pressure cooking appliance is provided for overcoming the defects of the prior art, and the problem that the opening and closing states of a pressure switch cannot be detected after the pressure cooking appliance adopts a full-bridge rectifying module is solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
The control method of the pressure cooking appliance comprises an inner container, a heating disc for heating the inner container, a pressure switch for detecting the pressure of the inner container and a control system for detecting the opening and closing states of the pressure switch, wherein the control system comprises: the pressure detection module is used for detecting the opening and closing states of the pressure switch; the temperature detection module is used for detecting the temperature of the inner container; the relay is used for controlling the on-off of the heating disc;
The control method comprises the following steps: s10, detecting the temperature T of the inner container through a temperature detection module, after the temperature T of the inner container reaches a preset range T A～TC, executing the step S20, and if T is more than T C, executing the step S30; s20, the relay is disconnected, the pressure detection module detects the opening and closing state of the pressure switch and outputs a waveform chart, and the waveform chart is analyzed to obtain the current opening and closing state of the pressure switch; s30, the relay is disconnected, and heating of the liner is stopped; wherein, T A is the minimum temperature at which the pressure switch is turned off, and T C is the rated temperature at which the pressure switch is turned off.
On the basis of the above scheme, in the step S20, analyzing the waveform diagram to obtain the current opening/closing state of the pressure switch includes: identifying a graphical shape of the waveform map; comparing the current waveform diagram with the waveform diagram when the pressure switch is disconnected, if the shapes of the patterns are the same, the pressure switch is in an open state, and if the shapes of the patterns are different, the pressure switch is in a closed state.
On the basis of the scheme, the control system further comprises an adjusting program for controlling the cooking state of the pressure cooking appliance according to the current state of the pressure switch, and the adjusting program is executed after the step S20 or the step S30.
On the basis of the scheme, the adjusting program comprises the following steps: m10 obtains the opening and closing state of the current pressure switch, if the pressure switch is closed, executing step M20, and if the pressure switch is opened, executing step M30; m20 controls the relay to maintain the closed state for the period of T1, and then step S10 is performed; m30 detects the temperature of the inner container in real time through the temperature detection module, when the temperature is lower than T A, the relay is closed, and the step S10 is executed; wherein T1 is more than or equal to 30s and less than or equal to 2min.
Based on the above scheme, in the step S20, the closing time of the relay is T2,1S is less than or equal to T2 < 2S, and the pressure detection module outputs a waveform diagram of the opening and closing states of the pressure switch in the time of T2.
On the basis of the scheme, the pressure switch is connected with the heating disc in series.
On the basis of the scheme, the pressure cooking appliance further comprises a circuit system, wherein the circuit system comprises a full-bridge rectifying module, a smoothing capacitor and a voltage reduction module, the smoothing capacitor is connected with the full-bridge rectifying module, and the voltage reduction module is connected with the smoothing capacitor and the pressure detection module.
On the basis of the scheme, the control system further comprises a chip control module and a relay driving module for controlling the relay to be opened and closed, and the chip control module is connected with and controls the temperature detection module, the pressure detection module and the relay driving module.
The invention has the beneficial effects that:
The pressure cooking utensil makes the soft rotten of food material through the inside pressure of improvement inner bag when cooking food material, in order to avoid the inside pressure of inner bag too big and there is danger, pressure cooking utensil disposes the temperature detection module that is used for detecting the inner bag temperature, there is certain relevance in the temperature of inner bag and the pressure of inner bag, when the temperature of inner bag is a certain temperature promptly, the pressure of inner bag also is a certain numerical value, consequently only need through the temperature detection of inner bag can survey the pressure of present inner bag, after the pressure reaches a certain numerical value, need stop the heating to the inner bag in order to avoid the continuation of inner bag pressure to increase. The pressure switch can detect the pressure of the inner container, and the pressure switch can be disconnected after the pressure of the inner container is increased, so that the pressure switch is only required to be detected in the open-close state, and the pressure detection module is used for detecting the open-close state of the pressure switch.
The pressure detection module can output a waveform chart according to the opening and closing states of the pressure switch, and the opening and closing states of the pressure switch can be obtained through analysis of the waveform chart.
The control method disclosed by the invention is mainly used for solving the problem that the opening and closing states of a pressure switch are difficult to detect when a full-bridge rectifier module is adopted in a pressure cooking appliance. When the pressure in the inner container reaches the value capable of switching off the pressure switch, the temperature in the inner container is T, but the value of T is not a fixed value, and certain deviation is allowed, namely when the temperature in the inner container is T A～TC, the pressure switch is possibly in an off state, the pressure switch is necessarily in a closed state when the temperature is smaller than T A and is necessarily in an off state when the temperature is larger than T C, so that when the temperature of the inner container is detected to be T C or larger than T C in the first step, whether the pressure switch is switched off is not needed to be judged any more, the third step can be directly carried out, and the pressure is prevented from being increased due to the fact that the temperature of the inner container is continuously increased. When the temperature is between T A～TC, the pressure switch may be in an open state or a closed state, and then the second step is performed, before the pressure detection module detects the open-close state of the pressure switch, the relay is closed so that the relay cannot influence the waveform diagram output by the pressure detection module, and thus the current state of the pressure switch can be accurately obtained by analyzing the waveform diagram output by the pressure detection module.
Further, in the step S20, analyzing the waveform diagram to obtain the current opening/closing state of the pressure switch includes: identifying a graphical shape of the waveform map; comparing the current waveform diagram with the waveform diagram when the pressure switch is disconnected, if the shapes of the patterns are the same, the pressure switch is in an open state, and if the shapes of the patterns are different, the pressure switch is in a closed state. When the pressure switch is in different states, the graph shapes of the waveform diagrams output by the pressure detection module are different, and when the relay is in an on state, the waveform diagrams output by the pressure detection module are the same when the pressure switch is closed and opened, so that after the relay is closed, the pressure switch in different states corresponds to the waveform diagrams in different shapes, and only the current waveform diagram is compared with the waveform diagram when the pressure switch is opened.
Further, the control system further comprises an adjusting program for controlling the cooking state of the pressure cooking appliance according to the current state of the pressure switch, and the adjusting program is executed after the step S20 or the step S30. The adjusting program can control the cooking state of the pressure cooking appliance according to the opening and closing state of the pressure switch, so that the cooking is assisted, and the cooking effect of food materials is improved.
Further, the adjustment program includes: m10 obtains the opening and closing state of the current pressure switch, if the pressure switch is closed, executing step M20, and if the pressure switch is opened, executing step M30; m20 controls the relay to maintain the closed state for the period of T1, and then step S10 is performed; m30 detects the temperature of the inner container in real time through the temperature detection module, when the temperature is lower than T A, the relay is closed, and the step S10 is executed; wherein T1 is more than or equal to 30s and less than or equal to 2min. The pressure switch is closed, which means that the pressure in the inner container does not reach a set value yet, if the heating is stopped, the pressure in the inner container is insufficient, so that food cannot reach the expected soft and rotten degree, and the user experience is affected, therefore, the temperature of the inner container still needs to be continuously increased, the opening and closing states of the pressure switch are detected by the pressure detection module at any moment, a large load is applied to the pressure detection module and the whole pressure cooking appliance system, after the heating is performed for a period of time T1, the opening and closing states of the pressure switch are detected, and the relay is closed until the pressure switch is in an opening state; when the pressure switch is turned off, the pressure in the inner container is enough, and the pressure is reduced after the temperature of the inner container is gradually reduced until the temperature is lower than T A, and then heating is restarted, so that the pressure and the temperature in the inner container can be always kept at the most suitable values to ensure the cooking effect; the heating time is 30S-2 min, so that the liner can be heated in place, if the heating time is too short, the pressure value is not increased enough, and a round of detection is possibly needed, if the heating time is too long, the temperature can directly exceed T C, and potential safety hazards are generated.
Further, in the step S20, the time period for closing the relay is T2,1S is less than or equal to T2 < 2S, and the pressure detection module outputs a waveform diagram of the opening and closing states of the pressure switch in the time of T2. The heating plate can stop acting and pause heating the inner container after the relay is closed, but the pressure detection module can detect the opening and closing state of the pressure switch in a short time, if the relay is kept closed all the time, the temperature and the pressure in the inner container can be reduced, the cooking effect is affected, and for this reason, the relay is set to be in a time of cutting off T2, namely, after the T2 time passes, the relay can be closed again.
Further, the pressure switch is connected in series with the heating plate. The circuit of pressure switch and dish that generates heat is the series connection, promptly after pressure switch breaks off, the dish that generates heat also can break off and can not continue to heat the inner bag, just so alright avoid inner bag temperature and pressure far above the safe numerical value of settlement, although the dish that generates heat stops heating, the relay still is in the closed state, consequently need control the open-close state of relay through the state detection to pressure switch, there is the relevance between relay and the dish that generates heat certainly, the dish that generates heat also can not produce heat when the relay is in the open state.
Further, the pressure cooking appliance further comprises a circuit system, wherein the circuit system comprises a full-bridge rectifying module, a smoothing capacitor and a voltage reduction module, the smoothing capacitor is connected with the full-bridge rectifying module, and the voltage reduction module is connected with the smoothing capacitor and the pressure detection module. Through setting up full bridge rectifier module, can guarantee that step-down module can normally work, the appearance value of smoothing capacitor can reduce in order to reduce cost like this.
These features and advantages of the present invention will be disclosed in detail in the following detailed description and the accompanying drawings.
[ Description of the drawings ]
The invention is further described with reference to the accompanying drawings:
FIG. 1 is a block diagram of a control system in an embodiment of the invention;
FIG. 2 is a flow chart of detecting the open/close state of the pressure switch according to an embodiment of the present invention;
Fig. 3 is a waveform diagram of the output of the pressure detecting module according to an embodiment of the invention.
[ Detailed description ] of the invention
The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present invention.
The appearances of the phrases such as "exemplary," "some embodiments," and the like in the following text are meant to be "serving as examples, embodiments, or illustrative," and any embodiment described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, it will be appreciated by those skilled in the art that the present disclosure may be practiced without some of these specific details.
Referring to fig. 1 to 3, an embodiment of the present invention discloses a control method of a pressure cooking appliance, wherein the pressure cooking appliance includes a liner, a heating plate for heating the liner, a pressure switch for detecting the pressure of the liner, and a control system for detecting the open/close state of the pressure switch, the control system including: the pressure detection module is used for detecting the opening and closing states of the pressure switch; the temperature detection module is used for detecting the temperature of the inner container; and the relay is used for controlling the on-off of the heating disc.
The pressure cooking utensil makes the soft rotten of food material through the inside pressure of improvement inner bag when cooking food material, in order to avoid the inside pressure of inner bag too big and there is danger, pressure cooking utensil disposes the temperature detection module that is used for detecting the inner bag temperature, there is certain relevance in the temperature of inner bag and the pressure of inner bag, when the temperature of inner bag is a certain temperature promptly, the pressure of inner bag also is a certain numerical value, consequently only need through the temperature detection of inner bag can survey the pressure of present inner bag, after the pressure reaches a certain numerical value, need stop the heating to the inner bag in order to avoid the continuation of inner bag pressure to increase. The pressure switch can detect the pressure of the inner container, and the pressure switch can be disconnected after the pressure of the inner container is increased, so that the pressure detection module can output a waveform chart according to the opening and closing states of the pressure switch, and the opening and closing states of the current pressure switch can be known through analysis of the waveform chart.
The circuit system is arranged in the pressure cooking appliance and generally comprises a smoothing capacitor and a voltage reduction module, in order to reduce the cost of the pressure cooking appliance, the capacitance value of the smoothing capacitor is reduced, but the voltage reduction module cannot work normally, so that the circuit system adopts a full-bridge rectifying module to replace the original half-bridge rectifying module, and the voltage reduction module can work normally. The smoothing capacitor is connected with the full-bridge rectifying module, and the voltage reducing module is connected with the smoothing capacitor and the pressure detecting module. When the full-bridge rectifying module is adopted in the pressure cooking appliance, the relay can interfere with the waveform diagram output by the pressure detection module, so that the opening and closing states of the pressure switch cannot be detected, and the pressure cooking appliance cannot control the opening and closing states of the relay according to the opening and closing states of the pressure switch.
The control method disclosed by the invention is mainly used for solving the problem that the opening and closing states of a pressure switch are difficult to detect when a full-bridge rectifier module is adopted in a pressure cooking appliance.
The control method comprises the following steps:
s10, detecting the temperature T of the inner container through a temperature detection module, after the temperature T of the inner container reaches a preset range T A～TC, executing the step S20, and if T is more than T C, executing the step S30;
s20, the relay is disconnected, the pressure detection module detects the opening and closing state of the pressure switch and outputs a waveform chart, and the waveform chart is analyzed to obtain the current opening and closing state of the pressure switch;
S30, the relay is opened, and heating of the inner container is stopped.
Wherein, T A is the minimum temperature at which the pressure switch is turned off, and T C is the rated temperature at which the pressure switch is turned off. When the pressure in the inner container reaches the value capable of switching off the pressure switch, the temperature in the inner container is T, but the value of T is not a fixed value, and certain deviation is allowed, namely when the temperature in the inner container is T A～TC, the pressure switch is possibly in an off state, the pressure switch is necessarily in a closed state when the temperature is smaller than T A and is necessarily in an off state when the temperature is larger than T C, so that when the temperature of the inner container is detected to be T C or larger than T C in the first step, whether the pressure switch is switched off is not needed to be judged any more, the third step can be directly carried out, and the pressure is prevented from being increased due to the fact that the temperature of the inner container is continuously increased. When the temperature is between T A～TC, the pressure switch may be in an open state or a closed state, and then the second step is performed, before the pressure detection module detects the open-close state of the pressure switch, the relay is closed so that the relay cannot influence the waveform diagram output by the pressure detection module, and thus the current state of the pressure switch can be accurately obtained by analyzing the waveform diagram output by the pressure detection module.
Specifically, in the step S20, the analysis of the waveform diagram to obtain the current opening/closing state of the pressure switch includes:
Identifying a graphical shape of the waveform map;
Comparing the current waveform diagram with the waveform diagram when the pressure switch is disconnected, if the shapes of the patterns are the same, the pressure switch is in an open state, and if the shapes of the patterns are different, the pressure switch is in a closed state.
A state stable device, the generated waveform signal is regular, and the device in different states, the generated stable waveform signal is different, the difference comprises: the waveform patterns formed by the waveform signals with the same parameters such as peak value, period and the like are the same. Therefore, when the pressure switch is in different states, the graph shape of the waveform chart output by the pressure detection module is also different, and when the relay is in an on state, the waveform chart output by the pressure detection module is the same when the pressure switch is closed and opened, so that after the relay is closed, the pressure switch in different states corresponds to the waveform chart in different shapes, and only the current waveform chart is compared with the waveform chart when the pressure switch is opened.
Specifically, there are four cases of the open and closed states of the relay and the pressure switch: 1, closing a relay and closing a pressure switch; 2, closing the relay and opening the pressure switch; 3, the relay is opened, and the pressure switch is closed; and 4, the relay is disconnected, and the pressure switch is disconnected. Referring to fig. 3, there are two waveforms in fig. 3, in the case of 1,2, and 3, the waveform is the upper graph in fig. 3, and in the case of 4, the waveform is the lower graph, so it can be seen that when the relay is closed, even if the pressure switch is opened, it cannot be obtained by analyzing the waveform, so that after the relay is closed, the two cases of 1 and 2 can be removed, and only the two cases of 3 and 4 remain, so that the current state of the pressure switch can be easily analyzed.
Because the relay needs to be closed when the opening and closing state of the pressure switch is detected, the heating plate stops working and stops heating the inner container after the relay is closed, but the opening and closing state detection of the pressure switch by the pressure detection module can be completed in a short time, if the relay is kept closed all the time, the temperature and the pressure in the inner container can be reduced, and the cooking effect is affected.
Based on the above embodiments, in one embodiment of the present invention, the control system further includes an adjustment program for controlling the cooking state of the pressure cooking appliance according to the current state of the pressure switch, the adjustment program being executed after step S20 or step S30.
The adjusting program can control the cooking state of the pressure cooking appliance according to the opening and closing state of the pressure switch, so that the cooking is assisted, and the cooking effect of food materials is improved.
Specifically, the adjustment procedure includes:
M10 obtains the opening and closing state of the current pressure switch, if the pressure switch is closed, executing step M20, and if the pressure switch is opened, executing step M30;
m20 controls the relay to maintain the closed state for the period of T1, and then step S10 is performed;
and M30 detects the temperature of the inner container in real time through the temperature detection module, and when the temperature is lower than T A, the relay is closed and the step S10 is executed.
Wherein T1 is more than or equal to 30s and less than or equal to 2min. The pressure switch is closed, which means that the pressure in the inner container does not reach a set value yet, if the heating is stopped, the pressure in the inner container is insufficient, so that food cannot reach the expected soft and rotten degree, and the user experience is affected, therefore, the temperature of the inner container still needs to be continuously increased, the opening and closing states of the pressure switch are detected by the pressure detection module at any moment, a large load is applied to the pressure detection module and the whole pressure cooking appliance system, after the heating is performed for a period of time T1, the opening and closing states of the pressure switch are detected, and the relay is closed until the pressure switch is in an opening state; when the pressure switch is turned off, the pressure in the inner container is enough, and the pressure is reduced after the temperature of the inner container is gradually reduced until the temperature is lower than T A, and then the heating is restarted, so that the pressure and the temperature in the inner container can be always kept at the most suitable values, and the cooking effect is ensured. ; the heating time is 30S-2 min, so that the liner can be heated in place, if the heating time is too short, the pressure value is not increased enough, and a round of detection is possibly needed, if the heating time is too long, the temperature can directly exceed T C, and potential safety hazards are generated.
In general, a safety value is set for the pressure of the inner container of the pressure cooking appliance, and when the pressure is below the safety value, the pressure cooking appliance is safe, and after exceeding the safety value, dangers may occur, and the higher the value, the greater the danger coefficient. When the temperature of the inner container is between T A～TC and the pressure switch is still in a closed state, according to the step M20 of the adjusting program, the relay is kept closed for a period of T1, namely the heating disc keeps heating the inner container in the period of T1, the temperature of the inner container after heating possibly exceeds T C, the pressure in the inner container also reaches or even exceeds a set safety value, and in order to ensure safety, the pressure switch is connected in series with the heating disc, so that once the pressure switch is disconnected, the heating disc is disconnected and the inner container is not continuously heated, and the temperature and the pressure of the inner container can be prevented from being far higher than the set safety value. Through such setting mode for in the actual use, the temperature of inner bag hardly exceeds T C, once the temperature reaches T C, pressure switch just can automatic disconnection and make the dish that generates heat stop heating, in order to improve pressure cooking utensil's security. Although the heating plate stops heating, the relay is still in a closed state, so that the opening and closing states of the relay need to be controlled through state detection of the pressure switch, and of course, there is also a correlation between the relay and the heating plate, and when the relay is in an open state, the heating plate cannot generate heat.
In addition, the control system further comprises a chip control module and a relay driving module for controlling the relay to be opened and closed, wherein the chip control module is connected with and controls the temperature detection module, the pressure detection module and the relay driving module. The chip control module can execute corresponding functions according to the states, signals and the like of all the elements, and the normal operation of the pressure cooking appliance is ensured.
While the invention has been described in terms of embodiments, it will be appreciated by those skilled in the art that the invention is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (8)
1. The control method of the pressure cooking appliance is characterized in that the pressure cooking appliance comprises an inner container, a heating plate for heating the inner container, a pressure switch for detecting the pressure of the inner container and a control system for detecting the opening and closing states of the pressure switch, and the control system comprises:
The pressure detection module is used for detecting the opening and closing states of the pressure switch;
the temperature detection module is used for detecting the temperature of the inner container;
the relay is used for controlling the on-off of the heating disc;
The control method comprises the following steps:
s10, detecting the temperature T of the inner container through a temperature detection module, after the temperature T of the inner container reaches a preset range T A～TC, executing the step S20, and if T is more than T C, executing the step S30;
s20, the relay is disconnected, the pressure detection module detects the opening and closing state of the pressure switch and outputs a waveform chart, and the waveform chart is analyzed to obtain the current opening and closing state of the pressure switch;
S30, the relay is disconnected, and heating of the liner is stopped;
Wherein, T A is the minimum temperature at which the pressure switch is turned off, and T C is the rated temperature at which the pressure switch is turned off.
2. The method according to claim 1, wherein in the step S20, analyzing the waveform pattern to obtain the current opening/closing state of the pressure switch includes:
Identifying a graphical shape of the waveform map;
Comparing the current waveform diagram with the waveform diagram when the pressure switch is disconnected, if the shapes of the patterns are the same, the pressure switch is in an open state, and if the shapes of the patterns are different, the pressure switch is in a closed state.
3. The control method of a pressure cooking appliance according to claim 1, wherein the control system further comprises an adjustment program for controlling a cooking state of the pressure cooking appliance according to a current state of the pressure switch, the adjustment program being executed after step S20 or step S30.
4. A control method of a pressure cooking appliance according to claim 3, wherein the adjustment program includes:
M10 obtains the opening and closing state of the current pressure switch, if the pressure switch is closed, executing step M20, and if the pressure switch is opened, executing step M30;
m20 controls the relay to maintain the closed state for the period of T1, and then step S10 is performed;
M30 detects the temperature of the inner container in real time through the temperature detection module, when the temperature is lower than T A, the relay is closed, and the step S10 is executed;
Wherein T1 is more than or equal to 30s and less than or equal to 2min.
5. The method according to claim 1, wherein in the step S20, the relay is turned off for a period of time T2,1S is less than or equal to T2 < 2S, and the pressure detection module outputs a waveform diagram of an open/close state of the pressure switch in a time T2.
6. The control method of a pressure cooking appliance according to any one of claims 1 to 5, wherein the pressure switch is connected in series to the heat generating plate.
7. The control method of a pressure cooking appliance according to any one of claims 1 to 5, further comprising circuitry including a full-bridge rectifying module, a smoothing capacitor connected to the full-bridge rectifying module, and a voltage-reducing module connected to the smoothing capacitor and the pressure detecting module.
8. The control method of a pressure cooking appliance according to any one of claims 1 to 5, wherein the control system further comprises a chip control module, a relay driving module for controlling opening and closing of a relay, the chip control module being connected to and controlling the temperature detecting module, the pressure detecting module, and the relay driving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210272013.9A CN114766905B (en) | 2022-03-18 | 2022-03-18 | Control method of pressure cooking appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210272013.9A CN114766905B (en) | 2022-03-18 | 2022-03-18 | Control method of pressure cooking appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114766905A CN114766905A (en) | 2022-07-22 |
| CN114766905B true CN114766905B (en) | 2024-04-19 |
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| CN202210272013.9A Active CN114766905B (en) | 2022-03-18 | 2022-03-18 | Control method of pressure cooking appliance |
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| KR20110007565U (en) * | 2011-07-13 | 2011-07-29 | 성옥 오 | Instant cooking container for press to regulate temperature |
| CN203164376U (en) * | 2013-03-26 | 2013-08-28 | 美的集团股份有限公司 | Switch detection circuit for pressure cooking appliance |
| CN105935244A (en) * | 2016-05-26 | 2016-09-14 | 珠海格力电器股份有限公司 | Pressure control method and apparatus of electric pressure cooker, and electric pressure cooker |
| CN106667241A (en) * | 2017-01-04 | 2017-05-17 | 九阳股份有限公司 | Method for cooking of pressure cooker |
| CN206628714U (en) * | 2017-04-10 | 2017-11-10 | 北京德威特继保自动化科技股份有限公司 | Low voltage switch equipment |
| CN110613333A (en) * | 2018-06-20 | 2019-12-27 | 佛山市顺德区美的电热电器制造有限公司 | Heating control method and system of pressure cooking appliance and pressure cooking appliance |
| CN113532679A (en) * | 2020-04-22 | 2021-10-22 | 浙江绍兴苏泊尔生活电器有限公司 | Circuit and method for temperature detection and pressure cooking appliance |
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| KR20110007565U (en) * | 2011-07-13 | 2011-07-29 | 성옥 오 | Instant cooking container for press to regulate temperature |
| CN203164376U (en) * | 2013-03-26 | 2013-08-28 | 美的集团股份有限公司 | Switch detection circuit for pressure cooking appliance |
| CN105935244A (en) * | 2016-05-26 | 2016-09-14 | 珠海格力电器股份有限公司 | Pressure control method and apparatus of electric pressure cooker, and electric pressure cooker |
| CN106667241A (en) * | 2017-01-04 | 2017-05-17 | 九阳股份有限公司 | Method for cooking of pressure cooker |
| CN206628714U (en) * | 2017-04-10 | 2017-11-10 | 北京德威特继保自动化科技股份有限公司 | Low voltage switch equipment |
| CN110613333A (en) * | 2018-06-20 | 2019-12-27 | 佛山市顺德区美的电热电器制造有限公司 | Heating control method and system of pressure cooking appliance and pressure cooking appliance |
| CN113532679A (en) * | 2020-04-22 | 2021-10-22 | 浙江绍兴苏泊尔生活电器有限公司 | Circuit and method for temperature detection and pressure cooking appliance |
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| CN114766905A (en) | 2022-07-22 |
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