CN108338670B

CN108338670B - Pressure cooking appliance and control device and method thereof

Info

Publication number: CN108338670B
Application number: CN201710047602.6A
Authority: CN
Inventors: 程志喜; 赵泽伟; 吕伟刚; 罗嗣胜
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2017-01-22
Filing date: 2017-01-22
Publication date: 2020-12-22
Anticipated expiration: 2037-01-22
Also published as: CN108338670A

Abstract

The invention discloses a pressure cooking appliance and a control device and a control method thereof, wherein in the device, a main control module is respectively connected with a heating module, an exhaust assembly and a pressure detection module, the main control module is used for controlling the pressure cooking appliance to be heated when the pressure parameter in a cooking cavity of the pressure cooking appliance reaches a first set threshold value, the current pressure in the pressure cooking utensil is maintained within a first preset range by controlling the heating module and/or the exhaust assembly, when the time for maintaining the pressure within the first preset range reaches a first preset time, by controlling the heating module and/or the exhaust assembly to reduce the pressure parameter within the cooking chamber of the pressure cooking appliance to a second set threshold and maintain the pressure within the cooking chamber of the pressure cooking appliance at the second set threshold, and controlling the heating module to continue heating when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold value.

Description

Pressure cooking appliance and control device and method thereof

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a control device of a pressure cooking appliance, the pressure cooking appliance and a control method of the pressure cooking appliance.

Background

When the current electric pressure cooker cooks, especially when carrying out the culinary art of fluid food such as congee, hot water, user generally feeds back that it has the culinary art time overlength and the unsatisfactory defect of effect. The main reason is that the overflow phenomenon is easily caused by the quick exhaust in the cooking process of porridge and soup foods. In order to avoid overflow, the current common cooking control strategy is to maintain a period of high-pressure cooking time, reduce the pressure to a non-pressure state by adopting an interval exhaust mode, finish cooking and prompt that a cover can be opened; or the cooking is finished after the high-pressure cooking is carried out for a certain time, and then the pressure reduction stage is carried out until the cover can be opened when no pressure is given. This still has the problem that whole cooking time is longer, and the time that the user waited for can uncapping is long to the user can't carry out operation such as uncapping fast safely in advance before the culinary art finishes. In addition, the electric pressure cooker only boils in the cooker when the electric pressure cooker heats, boosts and exhausts, so that the whole cooking process is insufficient in boiling, the actual cooking effect is poor, and the cooking effect is difficult to adjust in the process of a user.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a control device for a pressure cooking appliance, which not only facilitates a user to open a lid quickly and safely, but also ensures a cooking effect, thereby greatly improving the controllability and experience of the user on the pressure cooking appliance.

A second object of the present invention is to propose a pressure cooking appliance.

A third object of the present invention is to propose a control method of a pressure cooking appliance.

In order to achieve the above object, a first embodiment of the present invention provides a control device for a pressure cooking appliance, the device including: a heating module for heating the pressure cooking appliance; an exhaust assembly for exhausting the pressure cooking appliance; the pressure detection module is used for detecting a pressure parameter in a cooking cavity of the pressure cooking appliance after the pressure cooking appliance starts to cook; the main control module is used for controlling the heating module and/or the exhaust assembly to maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within a first preset range when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches a first set threshold value, and reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value by controlling the heating module and/or the exhaust assembly when the time for maintaining the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range reaches a first preset time, maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value, and maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold value, and controlling the heating module to continue heating.

According to the control device of the pressure cooking appliance provided by the embodiment of the invention, the main control module can maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches the first set threshold value, reduce the pressure parameter in the cooking cavity of the pressure cooking appliance to the second set threshold value after maintaining the current pressure parameter within the first preset range for a certain time, maintain the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value, and control the heating module to continue heating work while maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value, so that the user can conveniently and safely open the cover at the later stage of cooking and can also ensure the cooking effect, thereby greatly improving the controllability and experience of the user on the pressure cooking appliance.

In addition, the control device for the pressure cooking appliance according to the above embodiment of the present invention may further have the following additional technical features:

in particular, the pressure detection module comprises a pressure sensor and/or a temperature sensor and/or a zero pressure detection device.

And when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, the cooking cavity of the pressure cooking appliance is in a non-pressure state.

When the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, the cooking cavity of the pressure cooking appliance is in a low-pressure state, wherein the pressure in the low-pressure state is 5-25 kpa.

Preferably, the first preset time is 0-20 min.

Further, the control device of the pressure cooking appliance further includes: and the prompting module is connected with the main control module, wherein when the pressure in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold, the main control module controls the prompting module to send first prompting information so as to rapidly and safely open the cover of the pressure cooking appliance according to the first prompting information.

Further, the control device of the pressure cooking appliance further includes: the display module is connected with the main control module, and when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, the main control module acquires the maintenance time of the pressure in the cooking cavity of the pressure cooking appliance being the second set threshold, and controls the display module to display the maintenance time; and the adjusting module is connected with the main control module, wherein the main control module resets the maintaining time and the heating power of the heating module through the adjusting module in the maintaining time.

Further, the control device of the pressure cooking appliance further includes: the pressure cooking appliance opening and closing detection module is connected with the main control module and used for detecting that the pressure cooking appliance is in an opening state or a closing state, wherein the main control module is used for controlling the pressure cooking appliance to finish cooking when the pressure cooking appliance is detected to be in the opening state by the opening and closing detection module within the maintaining time.

Further, the main control module is further configured to control the prompt module to send out second prompt information when the open-close cover detection module detects that the pressure cooking appliance is in the open-close state within the maintaining time, so as to select whether to finish cooking according to the second prompt information, and when not selecting to finish cooking, continue to maintain the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold, and control the heating module to continue heating until the duration reaches a preset stewing time.

Further, the main control module is further configured to, within the maintaining time, maintain the heating power of the heating module adjustable within a first range when the open/close cover detection module detects that the pressure cooking appliance is in the closed cover state, and maintain the heating power of the heating module adjustable within a second range when the open/close cover detection module detects that the pressure cooking appliance is in the open cover state, where the second range includes the first range, and when the pressure cooking appliance is in the closed cover state and the heating power of the heating module is maintained within the first range, the pressure parameter in the cooking cavity does not rise and does not generate an overflow.

In order to achieve the above object, a second aspect of the present invention provides a pressure cooking appliance, which includes the control device of the pressure cooking appliance according to the first aspect of the present invention.

According to the pressure cooking appliance disclosed by the embodiment of the invention, the pressure is reduced and stewing is carried out at the later stage of cooking by low heating power, so that the pressure cooking appliance is convenient for a user to open the cover quickly and safely, and the cooking effect can be ensured, thereby greatly improving the controllability and experience of the user on the pressure cooking appliance.

In order to achieve the above object, a third embodiment of the present invention provides a method for controlling a pressure cooking appliance, including the steps of: detecting a pressure parameter in a cooking cavity of a pressure cooking appliance after the pressure cooking appliance starts to cook; when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches a first set threshold value, performing heating control and/or exhaust control on the pressure cooking appliance to maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within a first preset range; when the time for maintaining the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range reaches a first preset time, reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value by performing heating control and/or exhaust control on the pressure cooking appliance; and maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold, and controlling the pressure cooking appliance to continue heating when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold.

According to the control method of the pressure cooking appliance, when the pressure parameter in the pressure cooking appliance reaches the first set threshold value, maintaining the pressure parameter in the cooking cavity of the current pressure cooking utensil within a first preset range, and after maintaining the current pressure parameter within the first preset range for a certain time, reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value, and maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance to be the second set threshold value, controlling the pressure cooking appliance to continue heating operation while keeping the pressure parameter in the cooking cavity of the pressure cooking appliance at a second set threshold value, thereby, through reducing pressure and stew with low heating power and boil in the culinary art later stage, not only can convenience of customers uncap fast safely, can also guarantee the culinary art effect to user's nature controlled and experience to pressure cooking utensil has been improved greatly.

In addition, the control method of the pressure cooking appliance according to the above embodiment of the present invention may further have the following additional technical features:

in particular, the pressure in the cooking cavity of the pressure cooking appliance is detected by a pressure sensor and/or a temperature sensor and/or a zero pressure detection device.

Preferably, the first preset time is 0-20 min.

Further, the control method of the pressure cooking appliance further comprises the following steps: when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, first prompt information is sent out, so that the pressure cooking appliance can be opened quickly and safely according to the first prompt information.

Further, the control method of the pressure cooking appliance further comprises the following steps: when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, obtaining the maintaining time when the pressure in the cooking cavity of the pressure cooking appliance is the second set threshold, and displaying the maintaining time; resetting the maintaining time and the heating power of the pressure cooking appliance within the maintaining time.

Further, the control method of the pressure cooking appliance further comprises the following steps: detecting whether the pressure cooking appliance is in an open cover state or a closed cover state; and controlling the pressure cooking appliance to finish cooking when the pressure cooking appliance is detected to be in the open cover state within the maintaining time.

Further, the control method of the pressure cooking appliance further comprises the following steps: detecting whether the pressure cooking appliance is in an open cover state or a closed cover state; sending second prompt information when the pressure cooking appliance is detected to be in the uncovering state within the maintaining time, so that whether the cooking is finished or not is selected according to the second prompt information; and when the cooking is not finished, continuously maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value, and controlling the pressure cooking appliance to continuously heat until the duration time reaches the preset stewing time.

Further, during the maintaining time, when the pressure cooking appliance is detected to be in the cover closing state, the heating power of the pressure cooking appliance is maintained to be adjustable in a first range, and when the pressure cooking appliance is detected to be in the cover opening state, the heating power of the pressure cooking appliance is maintained to be adjustable in a second range, wherein the second range comprises the first range, and when the pressure cooking appliance is detected to be in the cover closing state and the heating power of the pressure cooking appliance is maintained to be in the first range, the pressure parameter in the cooking cavity does not rise and no overflow is generated.

Drawings

Fig. 1 is a block schematic diagram of a control device of a pressure cooking appliance according to an embodiment of the present invention;

fig. 2 is a block schematic diagram of a control device of a pressure cooking appliance according to another embodiment of the present invention;

FIG. 3 is a line graph showing pressure changes in a pressure cooking appliance according to an embodiment of the present invention;

FIG. 4 is a line graph showing pressure changes in a pressure cooking appliance according to another embodiment of the present invention;

FIG. 5 is a line graph showing pressure changes in a pressure cooking appliance according to still another embodiment of the present invention;

FIG. 6 is a line graph showing pressure changes in a pressure cooking appliance according to still another embodiment of the present invention;

fig. 7 is a flowchart of a control method of a pressure cooking appliance according to an embodiment of the present invention;

fig. 8 is a flowchart of a control method of a pressure cooking appliance according to an embodiment of the present invention;

fig. 9 is a flowchart of a control method of a pressure cooking appliance according to another embodiment of the present invention;

fig. 10 is a flowchart of a control method of a pressure cooking appliance according to still another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A pressure cooking appliance, a control apparatus and a method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a block diagram schematically illustrating a control apparatus of a pressure cooking appliance according to an embodiment of the present invention.

As shown in fig. 1, a control device of a pressure cooking appliance according to an embodiment of the present invention includes: the heating module 10, the exhaust assembly 20, the pressure detection module 30 and the main control module 40.

The heating module 10 is used for heating the pressure cooking utensil, the exhaust assembly 20 is used for exhausting the pressure cooking utensil, the pressure detection module 30 is used for detecting a pressure parameter in a cooking cavity of the pressure cooking utensil after the pressure cooking utensil starts to cook, the main control module 40 is respectively connected with the heating module 10, the exhaust assembly 20 and the pressure detection module 30, the main control module 40 is used for maintaining the current pressure parameter in the cooking cavity of the pressure cooking utensil within a first preset range by controlling the heating module 10 and/or the exhaust assembly 20 when the pressure parameter in the cooking cavity of the pressure cooking utensil reaches a first preset threshold value, and reducing the pressure parameter in the cooking cavity of the pressure cooking utensil to a second preset threshold value by controlling the heating module 10 and/or the exhaust assembly 20 when the time for maintaining the current pressure parameter in the cooking cavity of the pressure cooking utensil within the first preset range reaches the first preset time, and maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as a second set threshold, and controlling the heating module 10 to continue heating when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold.

It should be noted that, in actual cooking, in order to achieve the optimal cooking effect, the first preset range may be set as small as possible within a range of values or as a specific determination value by precise heating control or exhaust control.

The pressure cooking appliance of the embodiment of the invention can be an electric pressure cooker, a pressure rice cooker and the like, and can comprise a cooker cover and a cooker body, wherein the cooker cover and the cooker body can be directly or indirectly buckled to form a sealed cooking cavity capable of bearing pressure. The pressure parameter of the embodiment of the present invention may include pressure and temperature, and the pressure parameter may represent the pressure inside the cooking cavity of the pressure cooking appliance, specifically, the larger the pressure parameter, the larger the pressure inside the cooking cavity of the pressure cooking appliance. When the heating module 10 is turned on for heating, the pressure parameter in the sealed cooking cavity rises, and the exhaust assembly 20 can further adjust the pressure parameter in the sealed cooking cavity through the opening and closing of the exhaust. In one embodiment of the present invention, the pressure detection module 30 may include a pressure sensor and/or a temperature sensor and/or a zero pressure detection device. The pressure sensor can directly detect the pressure in the cooking cavity, and the temperature in the cooking cavity of the pressure cooking appliance detected by the temperature sensor can reflect the pressure in the pressure cooking appliance because the temperature in the cooking cavity of the pressure cooking appliance has a certain corresponding relation with the pressure. In addition, after the temperature in the cooking cavity of the pressure cooking appliance is detected by the temperature sensor, the pressure in the cooking cavity of the pressure cooking appliance can also be obtained by inquiring the temperature-pressure relation comparison table. In one embodiment of the present invention, the zero-pressure detecting device may include a zero-pressure float and a boost detecting signal switch, which can more accurately detect whether there is no pressure in the pressure cooking appliance or whether the pressure parameter is increased. It should be understood that the accuracy of pressure detection can be further improved by combining the detection results of two or three of the pressure sensor, the temperature sensor and the zero-pressure detection device.

In an embodiment of the present invention, the function of no-pressure stewing or low-pressure stewing can be set when the cooking mode of the pressure cooking appliance is selected, and correspondingly, the control program inside the main control module 40 can have a preset first set threshold, for example, a first pressure threshold P0 or a first temperature threshold T0. When the pressure cooking appliance starts to cook and the pressure parameter in the cooking cavity of the pressure cooking appliance does not reach the first set threshold, the heating module 10 may be controlled to operate at a larger first heating power, for example, at full power, so as to quickly increase the pressure in the cooking cavity of the pressure cooking appliance, thereby shortening the cooking time.

When the pressure in the cooking cavity of the pressure cooking appliance reaches the first set threshold, the pressure cooking appliance may be maintained, and specifically, when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches the first set threshold, the main control module 40 may control the heating module 10 to intermittently heat and/or the exhaust assembly 20 to intermittently exhaust to maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range. That is, the pressure parameter within the cooking cavity of the current pressure cooking appliance may be maintained at or near the first set threshold. The pressure maintaining time may be a first preset time, and the first preset time may be adjusted according to different functional requirements, and specifically may be 0 to 99min, and in one embodiment of the present invention, is preferably 0 to 20 min.

When the holding pressure time reaches the first preset time, the pressure cooking appliance can be depressurized, and natural depressurization or active depressurization through the exhaust assembly 20 can be performed until the pressure parameter in the cooking cavity of the pressure cooking appliance is reduced to the second set threshold value, and the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold value.

It should be understood that when the first preset time is 0, when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches the first set threshold, the pressure maintaining may not be performed, and the pressure parameter in the cooking cavity of the pressure cooking appliance may be directly reduced to the second set threshold.

When the non-pressure stewing function is set, when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be a second set threshold value, the cooking cavity of the pressure cooking appliance can be in a non-pressure state, the pressure in the non-pressure state can be 0-4kpa, the zero-pressure floater falls down in the non-pressure state, and at the moment, the heating module is controlled to continue working at a second heating power, so that the pressure cooking appliance executes the non-pressure stewing process.

When the low-pressure stewing function is set, when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be a second set threshold value, the cooking cavity of the pressure cooking appliance can be in a low-pressure state, the pressure intensity in the low-pressure state can be 5-25kpa, and at the moment, the heating module is controlled to maintain the pressure in a set low-pressure range with proper heating power, so that the pressure cooking appliance executes the low-pressure stewing process.

In the non-pressure stewing process or the low-pressure stewing process, the main control module 40 controls the heating power of the heating module 10 to be reduced to the second heating power to continue heating, so that the current non-pressure state or the low-pressure state can be continuously maintained, the pressure cooking appliance can be enabled to continue heating, and the boiling state of food is kept. The non-pressure stewing process or the low-pressure stewing process can be continued for the preset stewing time. In one embodiment of the present invention, if the pressure parameter in the cooking cavity of the pressure cooking appliance cannot be maintained at the second set threshold after reducing the heating power of the heating module 10, but continues to rise, the pressure parameter in the cooking cavity of the pressure cooking appliance may also be controlled to be maintained at the second set threshold by controlling the heating module 10 to stop heating and/or the venting assembly 20 to open venting.

In the exemplary embodiment of the invention, the power of the heating module 10 is not constant when heating at the first heating power or the second heating power, and the first heating power and the second heating power may both be the average power of the heating module 10 over a period of time. Generally, the second heating power may be lower than the first heating power. In some embodiments of the invention, the second heating power may also be equal to or greater than the first heating power (but the pressure parameter maintained when heating at the second heating power is lower than the pressure parameter maintained when heating at the first heating power).

It should be appreciated that during a no-pressure or low-pressure simmering process, the pressure cooking appliance may be quickly and safely opened during the process because there is no or low pressure within the cooking chamber of the pressure cooking appliance. In an embodiment of the present invention, as shown in fig. 2, the control device of the pressure cooking appliance may further include a prompt module 50, and the prompt module 50 is connected to the main control module 40, wherein when the pressure in the cooking cavity of the pressure cooking appliance is maintained at the second set threshold, the main control module 40 may further control the prompt module 50 to send a first prompt message, so that the user can open the lid of the pressure cooking appliance quickly and safely according to the first prompt message. In one embodiment of the present invention, the current no-pressure state or low-pressure state may be displayed through a control panel of the pressure cooking appliance. Under the non-pressure state, when pressure in the pressure cooking utensil was 0 promptly, the user can directly uncap fast safely, and under the low pressure state, the user can uncap fast safely after carrying out transient initiative step-down to pressure cooking utensil.

In addition, after the cover is safely opened, the cooking can be directly finished, the cooking can be continued until the cooking time reaches the total cooking time corresponding to the current cooking mode, or the duration time of the non-pressure stewing process reaches the preset stewing time, and of course, whether the cooking is continued or not can be set by a user. Specifically, the control device of the pressure cooking appliance according to the embodiment of the present invention may further include an open/close cover detection module, the open/close cover detection module is connected to the main control module, and the open/close cover detection module is configured to detect that the pressure cooking appliance is in an open state or a close state, wherein the main control module 40 is configured to control the pressure cooking appliance to finish cooking when the open/close cover detection module detects that the pressure cooking appliance is in the open state. In another embodiment of the present invention, the main control module 40 is further configured to control the prompting module to send out a second prompting message when the open-close detection module detects that the pressure cooking appliance is in the open-close state during the maintaining time, so that the user can select whether to end the cooking according to the second prompting message, and when the user does not select to end the cooking, continue to maintain the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold, and control the heating module to continue to perform the heating operation until the duration time reaches the preset stewing time.

In an embodiment of the present invention, the magnitude of the second heating power and the preset stewing time can be adjusted by means set by the user, so as to fully meet the personal requirements of the user. Specifically, the control device of the pressure cooking appliance may further include a display module and an adjustment module, wherein the display module is connected to the main control module 40, and when the pressure in the cooking cavity of the pressure cooking appliance is maintained at the second set threshold, the main control module 40 obtains a maintaining time when the pressure in the cooking cavity of the pressure cooking appliance is maintained at the second set threshold, and controls the display module to display the maintaining time; the adjusting module is connected to the main control module 40, wherein the main control module 40 resets the maintaining time and the heating power of the heating module through the adjusting module during the maintaining time.

In addition, in an embodiment of the present invention, the main control module 40 is further configured to maintain the heating power of the heating module 10 adjustable within a first range when the open/close detection module detects that the pressure cooking appliance is in the closed state, and maintain the heating power of the heating module 10 adjustable within a second range when the open/close detection module detects that the pressure cooking appliance is in the open state, wherein the second range includes the first range. When the pressure cooking utensil is in a cover closing state and the heating power of the heating module is maintained within a first range, the pressure parameter in the cooking cavity does not rise and does not generate overflow.

According to the control device of the pressure cooking appliance provided by the embodiment of the invention, the main control module can maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range when the pressure parameter in the pressure cooking appliance reaches the first preset threshold value, reduce the pressure parameter in the cooking cavity of the pressure cooking appliance to the second preset threshold value after maintaining the current pressure parameter within the first preset range for a certain time, maintain the pressure parameter in the cooking cavity of the pressure cooking appliance as the second preset threshold value, and control the heating module to work at the second heating power while maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second preset threshold value, so that the pressure is reduced and the low heating power is used for stewing in the later cooking stage, the control device not only can facilitate the user to quickly and safely open the cover, but also can ensure the cooking effect, thereby greatly improving the controllability and experience of the user on the pressure cooking appliance.

In an embodiment of the present invention, when the pressure cooking appliance performs the cooking mode 1, the main control module 40 may control the heating module 10 to start heating at the first heating power in a heating and pressure boosting phase, as shown in fig. 3, the pressure P in the pressure cooking appliance is continuously raised, and in the heating and pressure boosting phase, it may be determined whether the pressure detected by the pressure sensor and/or the pressure corresponding to the temperature detected by the temperature sensor reaches the first pressure threshold P0, and if not, the heating module 10 is continuously controlled to heat at the first heating power; if so, entering a pressure maintaining stage. In the pressure holding stage, as shown in fig. 3, the pressure P in the pressure cooking appliance is maintained within a certain range, the duration of the pressure holding stage is t1, and then the pressure reducing stage is entered. In the pressure reduction stage, the pressure P in the pressure cooking device can be actively reduced or naturally reduced, and when the pressure P in the pressure cooking device is reduced to 0-4kPa (a zero-pressure float falls), the non-pressure stewing stage can be entered, wherein fig. 3 takes the example that the pressure P is reduced to 0. In the non-pressure stewing stage, as shown in fig. 3, the pressure P in the pressure cooking utensil is maintained at 0, and the main control module 40 can control the heating module 10 to heat at the second heating power. The duration of the pressureless simmering phase is t 2. In the non-pressure stewing stage, the interface of the pressure cooking utensil can display the non-pressure state so as to prompt the non-pressure state, and a user can open the cover in time according to the requirement in the non-pressure stewing stage. According to different cooking modes, the second heating power of the non-pressure stewing stage can be adjusted within the range of 100W-600W according to different food cooking requirements, so that the food can be kept boiling, the pressure in the pressure cooking appliance is not increased any more, and the food is not overflowed. If the pressure rise is detected in the non-pressure stewing stage, the heating module 10 can be controlled to stop heating or reduce the pressure by active exhausting/cooling and the like, and the exhaust channel can be actively opened in the non-pressure stewing stage to better prevent the pressure rise again. When the duration of the non-pressure stewing stage reaches t2, the cooking can be finished, even if the user opens the cover during the period, if the cooking is not finished manually, the non-pressure stewing stage can be continued. In the non-pressure stewing stage, if the condition that the pot cover is completely opened can be detected, the full-power range adjustment can be carried out on the heating module 10 so as to obtain a better boiling effect.

In another embodiment of the present invention, when the pressure cooking appliance performs the cooking mode 2, the main control module 40 may control the heating module 10 to start heating at the first heating power during a heating and pressure boosting phase, as shown in fig. 4, the pressure P in the pressure cooking appliance is continuously raised, and during the heating and pressure boosting phase, it may be determined whether the pressure detected by the pressure sensor and/or the pressure corresponding to the temperature detected by the temperature sensor reaches the first pressure threshold P0, and if not, the heating module 10 is continuously controlled to heat at the first heating power; if so, entering a pressure maintaining stage. In the pressure holding stage, as shown in fig. 4, the pressure P in the pressure cooking appliance is maintained within a certain range, the duration of the pressure holding stage is tA, and then the pressure lowering stage is entered. In the pressure reduction stage, the pressure P in the pressure cooking utensil can be actively reduced or naturally reduced, and when the pressure is reduced to a second pressure threshold P1, the low-pressure stewing stage can be carried out, wherein 5kPa < P1 < 25 kPa. During the low-pressure stewing period, as shown in fig. 4, the pressure P in the pressure cooking device is maintained at a lower value, and the main control module 40 can control the heating module 10 to heat at the second heating power. The duration of the low-pressure simmering phase is tB. In the low-pressure stewing stage, the interface of the pressure cooking appliance can display the low-pressure state so as to prompt the low-pressure state, and in the low-pressure stewing stage, a user can rapidly and safely open the cover after the pressure cooking appliance is subjected to transient active pressure reduction according to the requirement. When the duration of the low-pressure stewing stage reaches tB, the pressure can be quickly reduced to a non-pressure state, and the cooking is finished.

In another embodiment of the present invention, when the pressure cooking appliance performs the cooking mode 3, the main control module 40 may control the heating module 10 to start heating at the first heating power during a heating and pressure boosting phase, as shown in fig. 5, the pressure P in the pressure cooking appliance is continuously raised, and during the heating and pressure boosting phase, it may be determined whether the pressure detected by the pressure sensor and/or the pressure corresponding to the temperature detected by the temperature sensor reaches the first pressure threshold value P0, and if not, the heating module 10 is continuously controlled to heat at the first heating power; if so, entering a pressure maintaining stage. In the pressure holding phase, as shown in fig. 5, the pressure P in the pressure cooking appliance is maintained within a certain range, the duration of the pressure holding phase is ta, and then the first pressure reduction phase is entered. In the first pressure reduction stage, the pressure P in the pressure cooking utensil can be actively reduced or naturally reduced, and when the pressure is reduced to a second pressure threshold P1, a low-pressure stewing stage can be entered, wherein 5kPa < P1 < 25 kPa. During the low-pressure stewing period, as shown in fig. 5, the pressure P in the pressure cooking device is maintained at a lower value, and the main control module 40 can control the heating module 10 to heat at the second heating power. In the low-pressure stewing stage, the interface of the pressure cooking appliance can display the low-pressure state so as to prompt the low-pressure state, and in the low-pressure stewing stage, a user can quickly and safely open the cover after carrying out short-time air exhaust and pressure reduction on the pressure cooking appliance according to the requirement. And the duration time of the low-pressure stewing stage is tb, then the second pressure reduction stage is carried out, and after the second pressure reduction stage, the pressure P in the pressure cooking utensil is reduced to 0, so that the non-pressure stewing stage is carried out. In the non-pressure stewing stage, as shown in fig. 5, the pressure P in the pressure cooking utensil is maintained at 0, and the main control module 40 can control the heating module 10 to heat at the second heating power. The duration of the pressureless simmering phase is tc. In the non-pressure stewing stage, the interface of the pressure cooking utensil can display the non-pressure state so as to prompt the non-pressure state, and a user can open the cover in time according to the requirement in the non-pressure stewing stage. Cooking can be ended when the duration of the non-pressure simmering phase reaches tc. If the cover opening is detected during the non-pressure stewing, a user can set whether to continue cooking, and if the cooking is not finished manually, the non-pressure stewing stage can be continued. The other program control method for detecting the cover opening during the non-pressure stewing is to automatically stop the program after the cover opening is detected in the non-pressure stewing state, and finish the cooking.

In addition, when the first preset time is 0, the pressure cooking appliance may not enter the pressure maintaining stage. As shown in fig. 6, when the pressure detected by the pressure sensor and/or the pressure corresponding to the temperature detected by the temperature sensor reaches the first pressure threshold P0 through the heating and pressure increasing stage, the pressure decreasing stage may be directly entered. The pressure P profile in the later part of the depressurization phase and in the low-pressure and/or pressureless simmering phases can be referred to the above-mentioned embodiments.

It should be noted that fig. 3 to 6 described above only show the variation trend of the pressure in the pressure cooking appliance with time, and in the specific practice of the present invention, the pressure may have a certain fluctuation and pause time in the process of rising, falling or maintaining the same.

The invention further provides a pressure cooking appliance corresponding to the embodiment.

The pressure cooking appliance according to the embodiment of the present invention includes the control device of the pressure cooking appliance according to the above embodiment of the present invention, and the specific implementation manner of the control device may refer to the above embodiment.

The invention further provides a control method of the pressure cooking appliance corresponding to the embodiment.

As shown in fig. 7, the method for controlling a pressure cooking appliance according to an embodiment of the present invention includes the steps of:

and S1, detecting the pressure parameter in the cooking cavity of the pressure cooking appliance after the pressure cooking appliance starts to cook.

The pressure cooking appliance of the embodiment of the invention can be an electric pressure cooker, a pressure rice cooker and the like, and can comprise a cooker cover and a cooker body, wherein the cooker cover and the cooker body can be directly or indirectly buckled to form a cooking cavity capable of bearing pressure. The pressure parameter of the embodiment of the present invention may include pressure and temperature, and the pressure parameter may represent the pressure inside the cooking cavity of the pressure cooking appliance, specifically, the larger the pressure parameter, the larger the pressure inside the cooking cavity of the pressure cooking appliance. When the pressure cooking appliance is started to heat, the pressure parameter in the cooking cavity rises, and the pressure parameter in the cooking cavity can be further adjusted through the opening and closing of the exhaust of the pressure cooking appliance. In one embodiment of the invention, the pressure parameter within the pressure cooking appliance may be detected by a pressure sensor and/or a temperature sensor and/or a zero pressure detection means. The pressure sensor can directly detect the pressure in the cooking cavity, and the temperature in the cooking cavity of the pressure cooking appliance detected by the temperature sensor can reflect the pressure in the pressure cooking appliance because the temperature in the cooking cavity of the pressure cooking appliance has a certain corresponding relation with the pressure. In addition, after the temperature in the cooking cavity of the pressure cooking appliance is detected by the temperature sensor, the pressure in the cooking cavity of the pressure cooking appliance can also be obtained by inquiring the temperature-pressure relation comparison table. In one embodiment of the present invention, the zero-pressure detecting device may include a zero-pressure float and a boost detecting signal switch, which can more accurately detect whether there is no pressure in the pressure cooking appliance or whether the pressure parameter is increased. It should be understood that the accuracy of pressure detection can be further improved by combining the detection results of two or three of the pressure sensor, the temperature sensor and the zero-pressure detection device.

In one embodiment of the present invention, the function of no-pressure stewing or low-pressure stewing can be set when the cooking mode of the pressure cooking appliance is selected, and correspondingly, a control program inside the pressure cooking appliance can have a preset first set threshold, for example, a first pressure threshold P0 or a first temperature threshold T0. When the pressure cooking appliance starts to cook and the pressure parameter in the cooking cavity of the pressure cooking appliance does not reach the first set threshold value, the pressure cooking appliance can work by adopting larger first heating power, such as full power, so that the pressure in the cooking cavity of the pressure cooking appliance is quickly increased, and the cooking time is shortened.

And S2, when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches a first set threshold value, performing heating control and/or exhaust control on the pressure cooking appliance to maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within a first preset range.

When the pressure in the cooking cavity of the pressure cooking appliance reaches a first set threshold, the pressure cooking appliance can be maintained, and specifically, when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches the first set threshold, the pressure parameter in the current pressure cooking appliance can be maintained within a first preset range by controlling the pressure cooking appliance to intermittently heat and/or intermittently exhaust. That is, the pressure parameter within the cooking cavity of the current pressure cooking appliance may be maintained at or near the first set threshold. The pressure maintaining time may be a first preset time, and the first preset time may be adjusted according to different functional requirements, and specifically may be 0 to 99min, and in one embodiment of the present invention, is preferably 0 to 20 min.

And 3, when the time for maintaining the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range reaches a first preset time, reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value by carrying out heating control and/or exhaust control on the pressure cooking appliance.

When the holding pressure time reaches the first preset time, the pressure cooking appliance can be depressurized, and natural depressurization or active depressurization through exhaust can be specifically performed.

And S4, maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as a second set threshold value, and controlling the pressure cooking appliance to continue heating when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold value.

After the pressure in the cooking cavity of the pressure cooking appliance is reduced to the second set threshold, the pressure in the cooking cavity of the pressure cooking appliance can be maintained at the second set threshold.

When the non-pressure stewing function is set, when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be a second set threshold value, the cooking cavity of the pressure cooking appliance can be in a non-pressure state, the pressure in the non-pressure state can be 0-4kpa, the zero-pressure floater falls down in the non-pressure state, and at the moment, the pressure cooking appliance is controlled to continuously work at a second heating power, so that the pressure cooking appliance executes the non-pressure stewing process.

When the low-pressure stewing function is set, when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be a second set threshold value, the cooking cavity of the pressure cooking appliance can be in a low-pressure state, the pressure intensity in the low-pressure state can be 5-25kpa, and at the moment, the pressure cooking appliance is controlled to maintain the pressure in a set low-pressure range by proper heating power so as to enable the pressure cooking appliance to execute a low-pressure stewing process.

In the non-pressure stewing process or the low-pressure stewing process, the heating power of the pressure cooking appliance can be controlled to be reduced to the second heating power to continue heating, so that the current non-pressure state or the low-pressure state can be continuously maintained, the pressure cooking appliance can be enabled to continue heating, and the boiling state of food is kept. The non-pressure stewing process or the low-pressure stewing process can be continued for the preset stewing time. In one embodiment of the present invention, if the pressure parameter in the cooking cavity of the pressure cooking appliance cannot be maintained at the second set threshold value after the heating power of the pressure cooking appliance is reduced, but continues to rise, the pressure parameter in the cooking cavity of the pressure cooking appliance may also be controlled to be maintained at the second set threshold value by stopping heating and/or turning on exhaust.

In the embodiment of the present invention, when heating is performed at the first heating power or the second heating power, the power is not constant, and the first heating power and the second heating power may be both average powers of the pressure cooking appliance during a period of operation. Generally, the second heating power may be lower than the first heating power. In some embodiments of the invention, the second heating power may also be equal to or greater than the first heating power (but the pressure parameter maintained when heating at the second heating power is lower than the pressure parameter maintained when heating at the first heating power).

It should be appreciated that during a no-pressure or low-pressure simmering process, the pressure cooking appliance may be quickly and safely opened during the process because there is no or low pressure within the cooking chamber of the pressure cooking appliance. In one embodiment of the invention, when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained at the second set threshold, the first prompt message can be sent out, so that the pressure cooking appliance can be opened quickly and safely according to the first prompt message. In one embodiment of the present invention, the current no-pressure state or low-pressure state may be displayed through a control panel of the pressure cooking appliance. Under the non-pressure state, when pressure in the pressure cooking utensil was 0 promptly, the user can directly uncap fast safely, and under the low pressure state, the user can uncap fast safely after carrying out transient initiative step-down to pressure cooking utensil.

In addition, after the cover is safely opened, the cooking can be directly finished, the cooking can be continued until the cooking time reaches the total cooking time corresponding to the current cooking mode, or the duration time of the non-pressure stewing process reaches the preset stewing time, and of course, whether the cooking is continued or not can be set by a user. Specifically, it is also possible to detect whether the pressure cooking appliance is in an open state or a closed state, and within the maintenance time, the pressure cooking appliance may be controlled to finish cooking when it is detected that the pressure cooking appliance is in the open state. In addition, when the pressure cooking appliance is detected to be in the uncovering state, second prompt information can be sent out so that whether the cooking is finished or not can be selected according to the second prompt information, when the cooking is not selected to be finished, the pressure parameter in the cooking cavity of the pressure cooking appliance is continuously maintained to be a second set threshold value, and the pressure cooking appliance is controlled to continue heating until the duration time reaches the preset stewing time.

In an embodiment of the present invention, the magnitude of the second heating power and the preset stewing time can be adjusted by means set by the user, so as to fully meet the personal requirements of the user. Specifically, when the pressure in the cooking cavity of the pressure cooking appliance is maintained at the second set threshold, the maintaining time during which the pressure in the cooking cavity of the pressure cooking appliance is at the second set threshold may be acquired, the maintaining time may be displayed, and the maintaining time and the heating power of the pressure cooking appliance may be reset during the maintaining time.

In addition, in one embodiment of the invention, during the maintaining time, when the pressure cooking appliance is detected to be in the cover closing state, the heating power of the pressure cooking appliance is maintained to be adjustable in a first range, and when the pressure cooking appliance is detected to be in the cover opening state, the heating power of the pressure cooking appliance is maintained to be adjustable in a second range, wherein the second range comprises the first range, and when the pressure cooking appliance is in the cover closing state and the heating power of the pressure cooking appliance is maintained to be in the first range, the pressure parameter in the cooking cavity does not rise and no overflow is generated.

According to the control method of the pressure cooking appliance, when the pressure parameter in the pressure cooking appliance reaches the first set threshold value, the current pressure parameter in the pressure cooking appliance is maintained within the first preset range, and after maintaining the current pressure parameter within the first preset range for a certain time, reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value, and maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance to be the second set threshold value, controlling the pressure cooking appliance to work at a second heating power while keeping the pressure parameter in the cooking cavity of the pressure cooking appliance at a second set threshold value, thereby, through reducing pressure and stew with low heating power and boil in the culinary art later stage, not only can convenience of customers uncap fast safely, can also guarantee the culinary art effect to user's nature controlled and experience to pressure cooking utensil has been improved greatly.

In an embodiment of the present invention, as shown in fig. 8, the method for controlling the pressure cooking appliance may include the steps of:

s701, the pressure cooking appliance performs a cooking mode 1.

S702, entering a heating and pressure boosting stage. In the heating and pressure boosting phase, the pressure cooking appliance starts heating with the first heating power, and as shown in fig. 3, the pressure P in the pressure cooking appliance is continuously increased.

And S703, detecting the pressure and/or the temperature. Wherein the magnitude of the temperature may also be indicative of the magnitude of the pressure, and thus a particular temperature value may correspond to a particular pressure value.

S704, it is determined whether the detected pressure reaches the first pressure threshold P0. If yes, go to step S705; if not, the process returns to step S702 to continue heating.

And S705, entering a pressure maintaining stage. In the pressure holding stage, as shown in fig. 3, the pressure P in the pressure cooking appliance is maintained within a certain range, and the duration of the pressure holding stage is t 1.

And S706, judging whether the duration of the pressure maintaining stage reaches t 1. If so, go to step S707; if not, staying in the pressure maintaining stage to keep the pressure within a certain range.

And S707, entering a pressure reduction stage. During the depressurization phase, the pressure P in the pressure cooking appliance can be actively or naturally reduced.

S708, judging whether the pressure in the pressure cooking appliance is reduced to 0-4kPa (the zero pressure float falls). If yes, executing steps S709 and S710; if not, staying in the step-down stage to continue the step-down. In fig. 3, the pressure P is reduced to 0 as an example.

And S709, entering a non-pressure stewing stage. In the non-pressure stewing stage, as shown in fig. 3, the pressure P in the pressure cooking appliance is maintained at 0, and the pressure cooking appliance can be controlled to heat at the second heating power. According to different cooking modes, the second heating power of the non-pressure stewing stage can be adjusted within the range of 100W-600W according to different food cooking requirements, so that the food can be kept boiling, the pressure in the pressure cooking appliance is not increased any more, and the food is not overflowed.

And S710, prompting a no-pressure state. For example, the non-pressure state can be displayed on the interface of the pressure cooking appliance, and the user can open the cover timely as required in the non-pressure stewing stage.

And S711, judging whether the duration of the non-pressure stewing stage reaches t 2. If yes, finishing cooking, namely opening the cover of a user during the cooking, and if the cooking is not finished manually, continuously staying in a non-pressure stewing stage; if not, the stewing process is stopped at the non-pressure stewing stage. In the non-pressure stewing stage, if the condition that the cooker cover is completely opened can be detected, the full-power range adjustment can be carried out on the pressure cooking appliance so as to obtain better boiling effect.

And S712, judging whether the cover opening action exists or not. If not, stopping at the non-pressure stewing stage; if so, the cooking is ended.

In another embodiment of the present invention, as shown in fig. 9, the method for controlling a pressure cooking appliance may include the steps of:

s801, the pressure cooking appliance performs cooking mode 2.

S802, entering a heating and pressure boosting stage. In the heating and pressure boosting phase, the pressure cooking appliance starts heating at the first heating power, and as shown in fig. 4, the pressure P in the pressure cooking appliance is continuously increased.

And S803, detecting the pressure and/or the temperature. Wherein the magnitude of the temperature may also be indicative of the magnitude of the pressure, and thus a particular temperature value may correspond to a particular pressure value.

S804, it is determined whether the detected pressure reaches the first pressure threshold P0. If yes, go to step S805; if not, the process returns to step S802 to continue heating.

And S805, entering a pressure maintaining stage. In the pressure holding stage, as shown in fig. 4, the pressure P in the pressure cooking appliance is maintained within a certain range, and the duration of the pressure holding stage is tA.

And S806, judging whether the duration of the pressure maintaining stage reaches tA. If so, go to step S807; if not, staying in the pressure maintaining stage to keep the pressure within a certain range.

S807, entering a pressure reduction stage. During the depressurization phase, the pressure P in the pressure cooking appliance can be actively or naturally reduced.

S808, it is determined whether the detected pressure falls to a second pressure threshold P1. Wherein, 5kPa < P1 < 25kPa, if yes, steps S809 and S810 are executed; if not, staying in the step-down stage to continue the step-down.

And S809, entering a low-pressure stewing stage. During the low-pressure stewing period, as shown in fig. 4, the pressure P in the pressure cooking appliance is maintained at a low value, and the pressure cooking appliance can be controlled to heat at the second heating power to maintain the low-pressure state cooking, and the pressure in the pressure cooking appliance is not increased any more.

And S810, low-voltage state prompting is carried out. For example, a low pressure state can be displayed on the interface of the pressure cooking appliance, and a user can open the cover quickly and safely after the pressure cooking appliance is subjected to short active depressurization as required in the low pressure stewing stage.

S811, judging whether the duration time of the low-pressure stewing stage reaches tB. If so, go to step S812; if not, staying in the low-pressure stewing stage.

And S812, rapidly reducing the pressure to a non-pressure state. Whether the pressure is reduced to a non-pressure state or not can be detected during rapid pressure reduction, and if yes, the cooking is finished.

In still another embodiment of the present invention, as shown in fig. 10, a method for controlling a pressure cooking appliance may include the steps of:

s901, the pressure cooking appliance executes a cooking mode 3.

And S902, entering a heating and pressure boosting stage. In the heating and pressure boosting phase, the pressure cooking appliance starts heating at the first heating power, and as shown in fig. 5, the pressure P in the pressure cooking appliance is continuously increased.

And S903, detecting the pressure and/or the temperature. Wherein the magnitude of the temperature may also be indicative of the magnitude of the pressure, and thus a particular temperature value may correspond to a particular pressure value.

S904, it is determined whether the detected pressure reaches a first pressure threshold P0. If yes, go to step S905; if not, the process returns to step S902 to continue heating.

And S905, entering a pressure maintaining stage. In the pressure holding stage, as shown in fig. 5, the pressure P in the pressure cooking appliance is maintained within a certain range, and the duration of the pressure holding stage is ta.

And S906, judging whether the duration of the pressure maintaining stage reaches ta. If so, go to step S907; if not, the pressure is kept in a pressure maintaining stage to keep the pressure within a certain range, and a user can adjust the pressure maintaining time in the pressure maintaining stage according to the requirement.

And S907, entering a first pressure reduction stage. In the first depressurization phase, the pressure P in the pressure cooking appliance can be actively or naturally reduced.

S908, it is determined whether the detected pressure has dropped to a second pressure threshold P1. Wherein, 5kPa < P1 < 25kPa, if yes, executing steps S909 and S910; if not, staying in the first pressure reduction stage to continue the pressure reduction.

And S909, entering a low-pressure stewing stage. During the low pressure stewing phase, as shown in fig. 5, the pressure P in the pressure cooking device is maintained at a low value by controlling the heating or pressure reducing device.

And S910, low-voltage state prompting is carried out. For example, a low pressure state can be displayed on the interface of the pressure cooking appliance, and a user can open the cover quickly and safely after the pressure cooking appliance is subjected to short active depressurization as required in the low pressure stewing stage.

And S911, judging whether the duration time of the low-pressure stewing stage reaches tb. If yes, go to step S912; if not, the low-pressure stewing stage is stopped, and the stewing time tb can be adjusted as required in the low-pressure stewing stage.

And S912, entering a second pressure reduction stage.

S913, judging whether the pressure in the pressure cooking appliance is reduced to 0-4 kPa. If so, steps S914 and S915 are performed; if not, staying in the second pressure reduction stage to continue the pressure reduction.

And S914, entering a non-pressure stewing stage. In the non-pressure stewing stage, as shown in fig. 5, the pressure P in the pressure cooking appliance is maintained at 0, and the pressure cooking appliance can be controlled to heat at the second heating power. According to different cooking modes, the second heating power of the non-pressure stewing stage can be adjusted within the range of 100W-600W according to different food cooking requirements, so that the food can be kept boiling, the pressure in the pressure cooking appliance is not increased any more, and the food is not overflowed. During the non-pressure stewing, if the situation that the pot cover is completely opened is detected, the full-power range adjustment can be carried out so as to obtain better boiling effect.

And S915, prompting a non-pressure state. For example, the non-pressure state can be displayed on the interface of the pressure cooking appliance, and the user can open the cover timely as required in the non-pressure stewing stage.

And S916, judging whether the duration time of the non-pressure stewing stage reaches tc. If yes, finishing cooking, namely opening the cover of a user during the cooking, and if the cooking is not finished manually, continuously staying in a non-pressure stewing stage; if not, the stewing process is stopped at the non-pressure stewing stage. Another program control method for detecting the uncovering during the non-pressure stewing is that after the uncovering is detected in the non-pressure stewing state, the program automatically stops the program and finishes the cooking

In the description of the present invention, it should be understood that the "pressureless state" refers to a state in which the pressure in the cooker is lower than a certain value and the zero-pressure float falls behind. The pressure range in the "low pressure state" is only a numerical range in which the test is preferable, and is not limited as an actual setting. The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A control device for a pressure cooking appliance, comprising:

a heating module for heating the pressure cooking appliance;

an exhaust assembly for exhausting the pressure cooking appliance;

the pressure detection module is used for detecting a pressure parameter in a cooking cavity of the pressure cooking appliance after the pressure cooking appliance starts to cook;

the main control module is used for controlling the heating module and/or the exhaust assembly to maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within a first preset range when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches a first set threshold value, and reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value by controlling the heating module and/or the exhaust assembly when the time for maintaining the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range reaches a first preset time, maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value, and maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold value, controlling the heating module to continue heating, wherein when the pressure in the cooking cavity of the pressure cooking appliance is maintained at the second set threshold, the cooking cavity of the pressure cooking appliance is in a non-pressure state or a low-pressure state;

the display module is connected with the main control module, and when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, the main control module acquires the maintenance time of the pressure in the cooking cavity of the pressure cooking appliance being the second set threshold, and controls the display module to display the maintenance time;

the adjusting module is connected with the main control module, and the main control module resets the maintaining time and the heating power of the heating module through the adjusting module in the maintaining time;

the main control module is used for controlling the prompting module to send out second prompting information when the opening and closing detection module detects that the pressure cooking utensil is in an opening state within the maintaining time so as to select whether to finish cooking according to the second prompting information, and when the pressure cooking utensil is not selected to finish cooking, the pressure parameter in the cooking cavity of the pressure cooking utensil is continuously maintained as the second set threshold value, and the heating module is controlled to continue heating until the duration time reaches the preset stewing time.

2. Control device of a pressure cooking appliance according to claim 1, characterized in that the pressure detection module comprises a pressure sensor and/or a temperature sensor and/or a zero pressure detection device.

3. The control device of a pressure cooking appliance according to claim 1, wherein the first preset time is 0-20 min.

4. The control device of the pressure cooking appliance according to any one of claims 1 to 3, further comprising:

and the prompting module is connected with the main control module, wherein when the pressure in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold, the main control module controls the prompting module to send first prompting information so as to rapidly and safely open the cover of the pressure cooking appliance according to the first prompting information.

5. The control device of a pressure cooking appliance according to claim 1, wherein the main control module is further configured to maintain the heating power of the heating module adjustable within a first range when the open/close cover detection module detects that the pressure cooking appliance is in the closed cover state, and maintain the heating power of the heating module adjustable within a second range when the open/close cover detection module detects that the pressure cooking appliance is in the open cover state, wherein the second range includes the first range, and when the pressure cooking appliance is in the closed cover state and the heating power of the heating module is maintained within the first range, the pressure parameter in the cooking cavity does not rise and no overflow is generated.

6. Pressure cooking appliance, characterized in that it comprises a control device of a pressure cooking appliance according to any one of claims 1-5.

7. A method for controlling a pressure cooking appliance, comprising the steps of:

detecting a pressure parameter in a cooking cavity of a pressure cooking appliance after the pressure cooking appliance starts to cook;

when the pressure parameter in the cooking cavity of the pressure cooking appliance reaches a first set threshold value, performing heating control and/or exhaust control on the pressure cooking appliance to maintain the current pressure parameter in the cooking cavity of the pressure cooking appliance within a first preset range;

when the time for maintaining the current pressure parameter in the cooking cavity of the pressure cooking appliance within the first preset range reaches a first preset time, reducing the pressure parameter in the cooking cavity of the pressure cooking appliance to a second set threshold value by performing heating control and/or exhaust control on the pressure cooking appliance;

maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold, and controlling the pressure cooking appliance to continue heating when the pressure parameter in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold, wherein when the pressure in the cooking cavity of the pressure cooking appliance is maintained as the second set threshold, the cooking cavity of the pressure cooking appliance is in a non-pressure state or a low-pressure state;

when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, obtaining the maintaining time when the pressure in the cooking cavity of the pressure cooking appliance is the second set threshold, and displaying the maintaining time;

resetting the maintaining time and the heating power of the pressure cooking appliance within the maintaining time;

detecting whether the pressure cooking appliance is in an open cover state or a closed cover state;

sending second prompt information when the pressure cooking appliance is detected to be in the uncovering state within the maintaining time, so that whether the cooking is finished or not is selected according to the second prompt information;

and when the cooking is not finished, continuously maintaining the pressure parameter in the cooking cavity of the pressure cooking appliance as the second set threshold value, and controlling the pressure cooking appliance to continuously heat until the duration time reaches the preset stewing time.

8. Method for controlling a pressure cooking appliance according to claim 7, characterized in that the pressure in the cooking cavity of the pressure cooking appliance is detected by means of a pressure sensor and/or a temperature sensor and/or a zero pressure detection device.

9. The method of controlling a pressure cooking appliance according to claim 7, wherein the first preset time is 0-20 min.

10. The control method of the pressure cooking appliance according to any one of claims 7 to 9, further comprising:

when the pressure in the cooking cavity of the pressure cooking appliance is maintained to be the second set threshold, first prompt information is sent out, so that the pressure cooking appliance can be opened quickly and safely according to the first prompt information.

11. The method of claim 7, wherein during the maintaining time, when the pressure cooking appliance is detected to be in the closed state, the heating power of the pressure cooking appliance is maintained adjustable within a first range, and when the pressure cooking appliance is detected to be in the open state, the heating power of the pressure cooking appliance is maintained adjustable within a second range, wherein the second range includes the first range, and when the pressure cooking appliance is detected to be in the closed state and the heating power of the pressure cooking appliance is maintained within the first range, the pressure parameter in the cooking cavity does not rise and no spray is generated.