CN113633167B - Pressure relief control method and device of electric pressure cooker and electric pressure cooker - Google Patents
Pressure relief control method and device of electric pressure cooker and electric pressure cooker Download PDFInfo
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- CN113633167B CN113633167B CN202110987375.1A CN202110987375A CN113633167B CN 113633167 B CN113633167 B CN 113633167B CN 202110987375 A CN202110987375 A CN 202110987375A CN 113633167 B CN113633167 B CN 113633167B
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- 238000010411 cooking Methods 0.000 description 3
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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
- A47J27/092—Devices for automatically releasing pressure before opening
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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
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
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Abstract
The invention discloses a pressure relief control method and device of an electric pressure cooker and the electric pressure cooker, wherein the pressure relief control method of the electric pressure cooker comprises the following steps: acquiring the current pressure of the electric pressure cooker; judging whether the current pressure reaches a preset initial pressure relief pressure or not; and when the current pressure reaches the initial pressure relief pressure, controlling the pressure relief port to open according to a preset exhaust frequency, wherein the opening time of each time is preset exhaust time. That is to say, the exhaust and pressure relief process of the electric pressure cooker is controlled by opening according to the preset exhaust frequency and the opening time of each time is the preset exhaust time, so that the change of the pressure in the cooker is not too severe, the exhaust and pressure relief processes are smoother, and the food in the cooker cannot overflow.
Description
Technical Field
The invention relates to the technical field of electric equipment, in particular to a pressure relief control method and device of an electric pressure cooker and the electric pressure cooker.
Background
The electric pressure cooker is widely used by people at present by virtue of the advantages of safety and convenience. The electric pressure cooker raises the boiling point of water to over 100 ℃ by increasing the pressure of the inner cooker, so that food is cooked quickly. However, after the electric pressure cooker finishes cooking, the cover can be opened only when the pressure in the cooker is reduced to a safe limit because the pressure in the cooker is still too high.
In the process of air exhaust and pressure relief, if the air exhaust speed is too high, the pressure in the cooker is quickly reduced, so that the food in the cooker overflows, and the normal use of the electric pressure cooker by a user is influenced. If the exhaust speed is too slow, the effect of rapid pressure relief cannot be achieved although food overflow cannot be caused. In order to quickly release the pressure, the pressure release time can be reduced by accelerating the cooling of the inner pot or exhausting the gas in the inner pot, and the pressure release time can be reduced by improving the exhaust speed, but if the exhaust speed is improved blindly, the pressure in the inner pot is quickly reduced, so that the secondary boiling of water is caused, the overflow phenomenon of food in the inner pot is caused, and the normal use of the electric pressure cooker is influenced.
Disclosure of Invention
In view of this, the embodiment of the invention provides a pressure relief control method and device for an electric pressure cooker and the electric pressure cooker, so as to solve the problem that food in the cooker overflows in the process of rapid pressure relief.
According to a first aspect, an embodiment of the present invention provides a pressure relief control method for an electric pressure cooker, including: acquiring the current pressure of the electric pressure cooker; judging whether the current pressure reaches a preset initial pressure relief pressure or not; and when the current pressure reaches the initial pressure relief pressure, controlling the pressure relief port to open according to a preset exhaust frequency, wherein the opening time of each time is preset exhaust time.
According to the pressure relief control method of the electric pressure cooker, provided by the embodiment of the invention, the initial pressure relief pressure, the opening frequency and the opening duration of the pressure relief opening are respectively determined by utilizing the pressure relief control curve, when the pressure of the electric pressure cooker reaches the initial pressure relief pressure, the pressure relief opening is controlled to be opened according to the preset exhaust frequency, and the opening duration of each time is the preset exhaust duration, namely, the exhaust and pressure relief process of the electric pressure cooker is controlled to be opened according to the preset exhaust frequency, and the opening duration of each time is the preset exhaust duration, so that the pressure relief process is not too severe, the exhaust and pressure relief process is smoother, and food in the electric pressure cooker cannot overflow.
With reference to the first aspect, in a first embodiment of the first aspect, before controlling the pressure relief opening to open according to a preset exhaust frequency and opening time of each time is preset exhaust time, the method further includes: dividing the pressure relief process into at least two pressure relief stages according to the initial pressure relief pressure and the target pressure of the electric pressure cooker; and respectively determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve.
With reference to the first embodiment of the first aspect, in a second embodiment of the first aspect, the controlling the pressure relief opening to open according to a preset exhaust frequency and the opening duration of each time meets a preset exhaust duration includes: acquiring the current pressure of the electric pressure cooker; judging whether the current pressure belongs to a current pressure relief stage or not; when the current pressure belongs to the current pressure relief stage, controlling the pressure relief port to be opened according to the exhaust frequency corresponding to the current pressure relief stage, wherein the opening duration of each time is the exhaust duration corresponding to the current pressure relief stage so as to relieve pressure; and when the current pressure is smaller than the minimum pressure of the current pressure relief stage, judging that the pressure relief process enters the next pressure relief stage, taking the next pressure relief stage as the current pressure relief stage, and returning to control the pressure relief port to be opened according to the exhaust frequency corresponding to the current pressure relief stage, wherein the opening duration of each time is the exhaust duration corresponding to the current pressure relief stage so as to relieve the pressure.
With reference to the first embodiment of the first aspect, in a third embodiment of the first aspect, the determining the exhaust frequency and the exhaust time length of each pressure relief stage according to the pressure relief control curve respectively includes: aiming at each pressure relief stage, obtaining the highest exhaust frequency and the longest exhaust duration of the pressure relief stage by using the lowest pressure of the pressure relief stage and the pressure relief control curve; determining the exhaust frequency of the pressure relief stage according to the highest exhaust frequency of the pressure relief stage, wherein the exhaust frequency of the pressure relief stage is less than the highest exhaust frequency of the pressure relief stage; and determining the exhaust time of the pressure relief stage according to the longest exhaust time of the pressure relief stage, wherein the exhaust time of the pressure relief stage is less than the longest exhaust time of the pressure relief stage.
With reference to the first embodiment of the first aspect, in a fourth embodiment of the first aspect, dividing the pressure relief process into at least two pressure relief stages according to the initial pressure relief pressure and the target pressure of the electric pressure cooker includes: determining a pressure segmentation point of the pressure relief process according to the pressure relief control curve; and dividing the pressure relief process into at least two pressure relief stages by using the initial pressure relief pressure, the pressure segmentation point and the target pressure.
With reference to the third embodiment of the first aspect, in a fifth embodiment of the first aspect, determining a pressure staging point of the pressure relief process according to the pressure relief control curve comprises: selecting a point in the pressure relief control curve, wherein the slope of the curve exceeds a preset slope threshold; and taking the selected point in the pressure relief control curve as a pressure subsection point in the pressure relief process.
With reference to the first aspect to the fifth embodiment of the first aspect, in the fifth embodiment of the first aspect, the method for controlling pressure relief of an electric pressure cooker further comprises: and cooling the inner cavity of the electric pressure cooker.
With reference to the first aspect or the fifth aspect, in a seventh aspect of the first aspect, the pressure relief control curve is:
p≤3×10 -9 ×P 6 -1×10 -6 ×P 5 +2×10 -4 ×P 4 -1.28×10 -2 ×P 3 +0.5688×P 2 -12.954×P+120
wherein p represents the exhaust frequency, times/min; and P represents the pressure of the electric pressure cooker, kPa.
According to a second aspect, the embodiment of the invention also provides a pressure relief control device of the electric pressure cooker, which comprises an acquisition module and a pressure relief module, wherein the acquisition module is used for acquiring the pressure of the electric pressure cooker; when the pressure reaches the preset initial pressure relief pressure, the pressure relief module is used for controlling the pressure relief opening to be opened according to the preset exhaust frequency, and the opening time of each time is the preset exhaust time.
According to a third aspect, an embodiment of the present invention further provides an electric pressure cooker, which includes a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions, so as to execute the method for controlling pressure release of the electric pressure cooker described in the first aspect or any one of the implementation manners of the first aspect.
According to a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions are configured to enable the computer to execute the method for controlling pressure relief of an electric pressure cooker described in the first aspect or any one of the implementation manners of the first aspect.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are schematic and are not to be understood as limiting the invention in any way, and in which:
FIG. 1 is a schematic flow chart of a pressure relief control method of an electric pressure cooker in embodiment 1 of the present invention;
FIG. 2 is a graph of the pressure in the pan P and the exhaust frequency P fitted by experimental data;
FIG. 3 is a schematic diagram of the pressure relief process divided into three pressure relief stages;
FIG. 4 is a schematic flow diagram of an example of an exhaust relief process;
fig. 5 is a schematic structural view of a pressure relief control device of an electric pressure cooker in embodiment 2 of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment 1 of the invention provides a pressure relief control method of an electric pressure cooker. Fig. 1 is a schematic flow chart of a pressure relief control method of an electric pressure cooker in embodiment 1 of the present invention, and as shown in fig. 1, the pressure relief control method of the electric pressure cooker in embodiment 1 of the present invention includes the following steps:
s101: and acquiring the current pressure of the electric pressure cooker.
Specifically, the current pressure of the electric pressure cooker can be obtained through a pressure sensor in an inner cavity of the electric pressure cooker.
S102: and judging whether the current pressure reaches a preset initial pressure relief pressure or not.
In embodiment 1 of the present invention, the initial pressure relief pressure is obtained according to a preset pressure relief control curve, and the pressure relief control curve can be obtained by fitting experimental data during normal exhaust (i.e., no food overflow).
S103: when the current pressure reaches the initial pressure relief pressure, the pressure relief port is controlled to be opened according to the preset exhaust frequency, and the opening time of each time is the preset exhaust time.
Specifically, the exhaust frequency and the exhaust duration are obtained according to a preset pressure relief control curve.
In example 1 of the present invention, the pressure release control curve can be obtained by fitting the experimental data when exhausting normally (i.e., no food spill). FIG. 2 is a graph of the relationship between the pressure in the pan P (kPa) and the exhaust frequency p (times/min, one exhaust time 0.5s) fitted by experimental data, i.e., the exhaust frequency p and the exhaust time per minute t (s/min) are respectively required to satisfy the following relationship:
p≤3×10 -9 ×P 6 -1×10 -6 ×P 5 +2×10 -4 ×P 4 -1.28×10 -2 ×P 3 +0.5688×P 2 -12.954×P+120
t≤0.5×(3×10 -9 ×P 6 -1×10 -6 ×P 5 +2×10 -4 ×P 4 -1.28×10 -2 ×P 3 +0.5688×P 2 -12.954×P+120)
for example, according to the above relation, when P is 1, the pressure in the cooker P is 70kPa calculated according to the functional relation, that is, when the pressure in the cooker P is less than or equal to 70kPa, the pressure release can be started. That is, the initial pressure relief pressure was 70 kPa.
In the pressure relief process, the opening frequency and the opening duration of the pressure relief opening are obtained through a preset pressure relief control curve.
Therefore, according to the pressure relief control method of the electric pressure cooker, the initial pressure relief pressure, the opening frequency and the opening duration of the pressure relief opening are respectively determined by using the pressure relief control curve, when the pressure of the electric pressure cooker reaches the initial pressure relief pressure, the pressure relief opening is controlled to be opened according to the preset exhaust frequency, and the opening duration of each time is the preset exhaust duration, namely, the exhaust pressure relief process of the electric pressure cooker is controlled by the pressure relief control curve, and the pressure relief control curve is fitted according to the experimental data during normal exhaust, so that the exhaust speed of the electric pressure cooker is controllable in the pressure relief process, and food in the electric pressure cooker cannot overflow.
But due to the process of exhaustingThere is a delay (for example 1min exhaust) so that it is not possible to adjust the exhaust frequency according to the above function at any moment, and it is therefore necessary to segment the pressure P 1 -P 2 ，P 2 -P 3 ，P 3 -P 4 ，P 4 -P 5 ，...，P t -0kPa, with different bleed frequencies at each pressure stage. That is to say, before controlling the pressure relief vent to open according to preset exhaust frequency and the opening duration of each time is preset exhaust duration, still include: dividing the pressure relief process into at least two pressure relief stages according to the initial pressure relief pressure and the target pressure of the electric pressure cooker; and respectively determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve.
Specifically, according to the initial pressure relief pressure and the target pressure of the electric pressure cooker, the pressure relief process is divided into at least two pressure relief stages including: determining a pressure segmentation point of the pressure relief process according to the pressure relief control curve; and dividing the pressure relief process into at least two pressure relief stages by using the initial pressure relief pressure, the pressure segmentation point and the target pressure. For example, a point of the slope of the curve exceeding a preset slope threshold value is selected in the pressure relief control curve; and taking the selected point in the pressure relief control curve as a pressure subsection point in the pressure relief process. As shown in FIG. 3, the fitting curve with a large change in slope of 20kPa and 10kPa was selected as a pressure segmentation point, i.e., the pressure was segmented into three segments of 70kPa to 20kPa, 20kPa to 10kPa, and 10kPa to 0kPa, each segment having a different exhaust frequency. It should be noted that the pressure relief process is not limited to the above subsection form, the pressure relief process may be sectioned in any form according to the requirement, the pressure relief process is divided into different numbers of sections according to different pressure value nodes, but the exhaust frequency and the exhaust duration in each pressure relief stage need to satisfy the above pressure relief control curve.
Specifically, determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve respectively comprises: aiming at each pressure relief stage, obtaining the highest exhaust frequency and the longest exhaust duration of the pressure relief stage by using the lowest pressure of the pressure relief stage and the pressure relief control curve; according to the dischargeDetermining the exhaust frequency of the pressure relief stage according to the highest exhaust frequency of the pressure relief stage, wherein the exhaust frequency of the pressure relief stage is less than the highest exhaust frequency of the pressure relief stage; and determining the exhaust duration of the pressure relief stage according to the longest exhaust duration of the pressure relief stage, wherein the exhaust duration of the pressure relief stage is less than the longest exhaust duration of the pressure relief stage. That is, the fastest discharge frequency p of each stage max Time of exhaust t max P is still required to be less than or equal to the minimum pressure in the pressure section calculated according to the fitting formula t ，t t I.e. p max ≤p t ，t max ≤t t 。
Further, the pressure relief opening is controlled to be opened according to a preset exhaust frequency, and the opening duration of each time meets the preset exhaust duration, so that the following technical scheme can be adopted: acquiring the current pressure of the electric pressure cooker; judging whether the current pressure belongs to a current pressure relief stage or not; when the current pressure belongs to the current pressure relief stage, controlling the pressure relief port to be opened according to the exhaust frequency corresponding to the current pressure relief stage, wherein the opening duration of each time is the exhaust duration corresponding to the current pressure relief stage so as to relieve pressure; and when the current pressure is smaller than the minimum pressure of the current pressure relief stage, judging that the pressure relief process enters the next pressure relief stage, taking the next pressure relief stage as the current pressure relief stage, and returning to control the pressure relief port to be opened according to the exhaust frequency corresponding to the current pressure relief stage, wherein the opening duration of each time is the exhaust duration corresponding to the current pressure relief stage so as to relieve the pressure. It can be seen that when the pressure relief process is divided into at least two pressure relief stages, the control process of each pressure relief stage is similar, as shown in detail in fig. 4.
For example, as shown in fig. 3, after cooking using the electric pressure cooker is completed, a pressure relief stage is entered. And continuously detecting the pressure in the cooker, and controlling the electromagnetic valve to cut off the exhaust pressure relief port at the frequency of P being 1 time/min and t being 0.5s/min (wherein P is obtained according to experimental data, and t being 0.5s as a set fixed time step length) when the pressure in the cooker is P being 70 kPa. When the pressure in the cooker is P equal to 20kPa, the electromagnetic valve is controlled to increase the exhaust frequency until P is 8 times/min and t is 4s/min (wherein t is the total exhaust time per minute and is not the time of one exhaust, the time of one exhaust is 0.5s, and 8 is 0.5 to 4), and the exhaust pressure relief opening is cut off to further increase the pressure relief speed. When the pressure in the cooker is 10kPa, the electromagnetic valve is controlled to increase the exhaust frequency until P is 36 times/min, t is 18s/min (wherein t is the total exhaust time per minute, not the exhaust time per time, the exhaust time per time is 0.5s, 36 is 0.5 to 18), and the exhaust pressure relief opening is cut off until the internal pressure of the cooker reaches the atmospheric pressure, so that the cooker cover can be safely opened. Therefore, the pressure relief stage can be ensured, food in the pot does not overflow, the pressure relief time can be greatly shortened, the waiting time after cooking by a user is reduced, and the user experience is improved.
Therefore, the fitting curve is established based on a large amount of experimental data in the embodiment 1 of the invention, so that the maximum pressure capable of exhausting and decompressing in the decompression process of the electric pressure cooker, and the highest exhaust frequency and the longest exhaust time which can be adopted in different pressure states can be determined. The adoption of the sectional form can ensure that the selected pressure relief frequency is the fastest, namely the opening time of the exhaust valve is the longest, so that the pressure relief speed is the fastest and the pressure relief time is shortened to the maximum extent on the premise of no overflow.
As a further implementation manner, the pressure relief control method of the electric pressure cooker further comprises the step of cooling the inner cavity of the electric pressure cooker. Wherein the cooling treatment includes but is not limited to air cooling and liquid cooling. That is, the pressure release control method is not limited to the simple exhaust and pressure release technology, and the liquid cooling-exhaust coupling, the air cooling-exhaust coupling and the like relate to the exhaust and pressure release, so that the food in the pot can be prevented from overflowing as long as the functional relationship among the exhaust frequency, the exhaust time and the internal pressure of the pot is satisfied.
Example 2
Corresponding to the embodiment 1 of the invention, the embodiment 2 of the invention provides a pressure relief control device of an electric pressure cooker. Fig. 5 is a schematic structural view of a pressure relief control device of an electric pressure cooker in embodiment 2 of the present invention, and as shown in fig. 5, the pressure relief control device of the electric pressure cooker in embodiment 2 of the present invention includes an obtaining module 21 and a pressure relief module 22.
Specifically, the acquiring module 21 is used for acquiring the pressure of the electric pressure cooker;
the pressure relief module 22 is used for controlling the pressure relief port to be opened according to a preset exhaust frequency when the pressure reaches a preset initial pressure relief pressure, and the opening duration of each time is a preset exhaust duration; and the initial pressure relief pressure, the exhaust frequency and the exhaust duration are obtained according to a preset pressure relief control curve.
The details of the pressure relief control device of the electric pressure cooker can be understood by referring to the corresponding related description and effects in the embodiments shown in fig. 1 to 4, which are not described herein again.
Example 3
The embodiment of the invention also provides the electric pressure cooker which can comprise a processor and a memory, wherein the processor and the memory can be connected through a bus or other modes.
The processor may be a Central Processing Unit (CPU). The Processor may also be other general purpose Processor, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or a combination thereof.
The memory, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules (for example, the obtaining module 21 and the pressure relief module 22 shown in fig. 5) corresponding to the pressure relief control method of the electric pressure cooker in the embodiment of the present invention. The processor executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory, namely, the pressure relief control method of the electric pressure cooker in the embodiment of the method is realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor, and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and such remote memory may be coupled to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory, and when being executed by the processor, the one or more modules execute the pressure relief control method of the electric pressure cooker in the embodiment shown in fig. 1-4.
The details of the electric pressure cooker can be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to 5, which are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk Drive (Hard Disk Drive, abbreviated as HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (9)
1. A pressure relief control method of an electric pressure cooker is characterized by comprising the following steps:
acquiring the current pressure of the electric pressure cooker;
judging whether the current pressure reaches a preset initial pressure relief pressure or not;
when the current pressure reaches the initial pressure relief pressure, controlling a pressure relief opening to be opened according to a preset exhaust frequency, wherein the opening duration of each time is a preset exhaust duration;
control the pressure release mouth opens according to predetermined exhaust frequency and before the time length is for predetermined exhaust when opening at every turn, still includes:
dividing the pressure relief process into at least two pressure relief stages according to the initial pressure relief pressure and the target pressure of the electric pressure cooker;
respectively determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve;
respectively determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve comprises the following steps:
aiming at each pressure relief stage, obtaining the highest exhaust frequency and the longest exhaust duration of the pressure relief stage by using the lowest pressure of the pressure relief stage and the pressure relief control curve;
determining the exhaust frequency of the pressure relief stage according to the highest exhaust frequency of the pressure relief stage, wherein the exhaust frequency of the pressure relief stage is less than the highest exhaust frequency of the pressure relief stage;
and determining the exhaust time of the pressure relief stage according to the longest exhaust time of the pressure relief stage, wherein the exhaust time of the pressure relief stage is less than the longest exhaust time of the pressure relief stage.
2. The method according to claim 1, wherein the step of controlling the pressure relief port to open according to a preset exhaust frequency and the opening duration of each time meets a preset exhaust duration comprises the steps of:
acquiring the current pressure of the electric pressure cooker;
judging whether the current pressure belongs to a current pressure relief stage or not;
when the current pressure belongs to the current pressure relief stage, controlling the pressure relief port to be opened according to the exhaust frequency corresponding to the current pressure relief stage, wherein the opening duration of each time is the exhaust duration corresponding to the current pressure relief stage so as to relieve pressure;
and when the current pressure is smaller than the minimum pressure of the current pressure relief stage, judging that the pressure relief process enters the next pressure relief stage, taking the next pressure relief stage as the current pressure relief stage, and returning to control the pressure relief port to be opened according to the exhaust frequency corresponding to the current pressure relief stage, wherein the opening duration of each time is the exhaust duration corresponding to the current pressure relief stage so as to relieve the pressure.
3. The method of claim 1, wherein dividing the pressure relief process into at least two pressure relief stages based on the initial pressure relief pressure and a target pressure of the electric pressure cooker comprises:
determining a pressure segmentation point of the pressure relief process according to the pressure relief control curve;
and dividing the pressure relief process into at least two pressure relief stages by using the initial pressure relief pressure, the pressure segmentation point and the target pressure.
4. The method of claim 3, wherein determining pressure staging points for the pressure relief process from the pressure relief control curve comprises:
selecting a point in the pressure relief control curve, wherein the slope of the curve exceeds a preset slope threshold;
and taking the selected point in the pressure relief control curve as a pressure subsection point in the pressure relief process.
5. The method of any one of claims 1 to 4, further comprising:
and cooling the inner cavity of the electric pressure cooker.
6. The method according to any one of claims 1 to 4, wherein the pressure relief control curve is:
p≤3×10 -9 ×P 6 -1×10 -6 ×P 5 +2×10 -4 ×P 4 -1.28×10 -2 ×P 3 +0.5688×P 2 -12.954×P+120
wherein p represents the exhaust frequency, times/min; and P represents the pressure of the electric pressure cooker, kPa.
7. The utility model provides a pressure release controlling means of electric pressure cooker which characterized in that includes:
the acquisition module is used for acquiring the pressure of the electric pressure cooker;
the pressure relief module is used for dividing the pressure relief process into at least two pressure relief stages according to the initial pressure relief pressure and the target pressure of the electric pressure cooker when the pressure reaches the preset initial pressure relief pressure; respectively determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve;
respectively determining the exhaust frequency and the exhaust duration of each pressure relief stage according to the pressure relief control curve comprises the following steps:
aiming at each pressure relief stage, obtaining the highest exhaust frequency and the longest exhaust duration of the pressure relief stage by using the lowest pressure of the pressure relief stage and the pressure relief control curve;
determining the exhaust frequency of the pressure relief stage according to the highest exhaust frequency of the pressure relief stage, wherein the exhaust frequency of the pressure relief stage is less than the highest exhaust frequency of the pressure relief stage;
and determining the exhaust time of the pressure relief stage according to the longest exhaust time of the pressure relief stage, wherein the exhaust time of the pressure relief stage is less than the longest exhaust time of the pressure relief stage.
8. An electric pressure cooker, characterized in that it comprises a memory and a processor, said memory and said processor are connected with each other in communication, said memory stores computer instructions, said processor executes said computer instructions, thereby executing the pressure relief control method of the electric pressure cooker according to any one of claims 1-6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions for causing the computer to execute the method for controlling pressure relief of an electric pressure cooker according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987375.1A CN113633167B (en) | 2021-08-26 | 2021-08-26 | Pressure relief control method and device of electric pressure cooker and electric pressure cooker |
Applications Claiming Priority (1)
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