CN110575062B - Pressure cooking appliance and control method thereof - Google Patents

Abstract

The embodiment of the invention discloses a pressure cooking appliance and a control method thereof; the pressure cooking appliance may include: the pot body, the upper cover and the cover plate; the upper cover and the cover plate form a pot cover; an inner container is arranged in the pot body, and a cooking cavity is formed by the inner container and the upper cover; the cover plate is provided with a cooling device, the cooling device is directly contacted with the cooking cavity, and liquid for exchanging heat with the cooking cavity is contained in the cooling device; the pressure cooking appliance further comprises an exhaust device comprising: an exhaust passage arranged on the cooker cover and communicated with the inner part of the inner cooker and a pressure limiting valve for controlling the opening and closing of the exhaust passage; the pressure cooking appliance further comprises a control portion configured to reduce a pressure value within the cooking cavity using the cooling device and the exhaust device based on a set depressurization strategy. So that the pressure in the pressure cooking appliance can be reduced quickly, safely and quietly.

Description

Pressure cooking appliance and control method thereof

Technical Field

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

Background

Pressure cooking utensil has become the cooking equipment that we are indispensable in the kitchen because it has the culinary art fast, and the culinary art is high temperature, and food taste is good and energy-conservation etc. numerous advantages. However, when a traditional pressure cooking appliance, such as an electric pressure cooker, is used for cooking, after the cooking process is finished, because the air pressure in the pressure cooking appliance is high, a user cannot open the cooker cover immediately, and the pressure limiting valve needs to be opened to exhaust and reduce the pressure, or the food in the cooker is naturally cooled. In addition, in the process that a user opens the pressure limiting valve to exhaust and reduce pressure, if fluid food is cooked in the pot, the fluid food in the pot is easily sprayed out from the exhaust port by high-pressure gas, so that danger is brought to the user, and the outer surface and the environment of the pot body are polluted.

Disclosure of Invention

In order to solve the above technical problems, embodiments of the present invention are directed to a pressure cooking appliance and a control method of the pressure cooking appliance, which can quickly and safely reduce pressure in the pressure cooking appliance.

The technical scheme of the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a pressure cooking appliance, where the pressure cooking appliance includes: the pot body, the upper cover and the cover plate; the upper cover and the cover plate form a pot cover; an inner container is arranged in the pot body, and a cooking cavity is formed by the inner container and the upper cover; the cover plate is provided with a cooling device, the cooling device is directly contacted with the cooking cavity, and liquid for exchanging heat with the cooking cavity is contained in the cooling device;

The pressure cooking appliance further comprises an exhaust device comprising: an exhaust passage arranged on the cooker cover and communicated with the inner part of the inner cooker and a pressure limiting valve for controlling the opening and closing of the exhaust passage;

the pressure cooking appliance further comprises a control portion configured to reduce a pressure value within the cooking cavity using the cooling device and the exhaust device based on a set depressurization strategy.

In a second aspect, an embodiment of the present invention provides a control method, where the method is applied to a pressure cooking appliance, where the pressure cooking appliance includes: the pot body, the upper cover and the cover plate; the upper cover and the cover plate form a pot cover; the inner container is arranged in the pot body and forms a cooking cavity with the upper cover; the cover plate is provided with a cooling device, the cooling device is directly contacted with the cooking cavity, and liquid for exchanging heat with the cooking cavity is contained in the cooling device; the pressure cooking appliance further comprises an exhaust device comprising: an exhaust passage arranged on the cooker cover and communicated with the inner part of the inner cooker and a pressure limiting valve for controlling the opening and closing of the exhaust passage; the method comprises the following steps:

reducing a pressure value within the cooking cavity using the cooling device and the exhaust device based on a set depressurization strategy.

The embodiment of the invention provides a pressure cooking appliance and a control method of the pressure cooking appliance, wherein the pressure value of steam in a cooking cavity is reduced by controlling the starting and stopping states of a cooling device and an exhaust device in a pressure reduction stage after cooking is finished, so that the pressure in the pressure cooking appliance can be reduced quickly, safely and quietly.

Drawings

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

FIG. 2 is a schematic structural diagram of another pressure cooking appliance according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a control method according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of another control method according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example one

Referring to fig. 1, which illustrates a structure of a pressure cooking appliance according to an embodiment of the present invention, the pressure cooking appliance may include a pot body 1, an upper cover 2, and acover plate 3; the upper cover and the cover plate form a pot cover; an inner container 9 is arranged in the pot body 1 and forms a cooking cavity with the upper cover 2; thecover plate 3 is provided with a cooling device 4, the cooling device 4 is directly contacted with the cooking cavity, and liquid for exchanging heat with the cooking cavity is contained in the cooling device 4;

The pressure cooking appliance further comprises an exhaust device comprising: anexhaust passage 10 which is arranged on the cooker cover and communicated with the inner part of the inner cooker and apressure limiting valve 11 which controls the opening and closing of the exhaust passage;

the pressure cooking appliance further comprises a control part configured to reduce the pressure value within the cooking cavity using the cooling device 4 and the exhaust device based on a set depressurization strategy.

It will be appreciated that the cooling means 4 is in direct contact with said cooking cavity and that the cooling means contains a liquid for heat exchange with said cooking cavity. Therefore, in this embodiment, a surface of the cooling device directly contacting the cooking cavity may be referred to as a cooling surface, and the cooling surface directly contacts the cooking cavity, specifically, as shown in fig. 1, the cooling surface of the cooling device 4 and thecover plate 3 form a cooling cavity, and a notch is provided at thecover plate 3; or as shown in fig. 2, the cooling surface may be arranged on the contact surface of thecover plate 3 and the cooking cavity, so that the gas in the cooking cavity can be directly contacted with the cooling surface.

For the cooling device of the scheme, the cooling device also comprises a water inlet and a water outlet, and in addition, a driving water pump 8 and a water tank 7 filled with the liquid can be arranged in the pot body; the water inlet is connected with a water outlet of the water tank 7 through a water supply pipeline 5, and the water outlet is connected with a water return port of the water tank 7 through a water return pipeline 6 to form a circulation loop; the driving water pump 8 is used for driving the liquid in the water tank to circularly flow in the circulating loop. At this time, after the liquid in the cooling device 4 and the steam in the cooking cavity complete heat exchange, the heat of the liquid in the cooling device 4 is taken away by driving the circulating flow driven by the water pump 8, so that the pressure is reduced by reducing the temperature of the steam in the cooking cavity.

It can be understood that when the tightness of the water tank 7 and the cooling device 4 is better, the water tank 7 and the cooling device 4 can contain liquid gas for heat exchange, such as liquid nitrogen, so that the temperature of steam in the cooking cavity can be reduced more quickly for pressure reduction.

Based on the above circulation loop, the control part is specifically configured to send a start instruction to the drive water pump 8, where the start instruction is used to start the drive water pump 8 to drive the liquid in the water tank 7 to circularly flow in the circulation loop.

It should be noted that, since the control portion utilizes the cooling device 4 to reduce the pressure value in the cooking cavity, the control portion can drive the liquid in the water tank 7 and the liquid in the cooling device 4 to circularly flow in the circulation loop by starting the driving water pump 8 to realize temperature reduction, so as to realize the effect of pressure reduction. When the driving water pump 8 is turned off, the circulating flow cannot be realized, so that the reduction of the pressure value in the cooking cavity by the cooling device 4 can be stopped.

For the exhaust device, the pressure value in the cooking cavity is reduced by the exhaust device, and the starting and stopping states of the exhaust device can be controlled by the control part. Specifically, the control portion is configured to send an opening instruction to thepressure limiting valve 11, the opening instruction being used to instruct thepressure limiting valve 11 to open theexhaust passage 10.

Furthermore, for the solution shown in fig. 1 or fig. 2, in a possible implementation, the pressure cooking appliance further comprises a pressure detector for detecting a pressure value in the cooking cavity; accordingly, the number of the first and second electrodes,

the control section is configured to: after the cooking process is finished, reducing the pressure value in the cooking cavity by using the cooling device 4;

when the pressure detector detects that the pressure value in the cooking cavity is reduced to a first pressure threshold value, the exhaust device is started to reduce the pressure value in the cooking cavity, and the opening state of the cooling device 4 is kept;

when the pressure detector detects that the pressure value in the cooking cavity falls to a second pressure threshold value, the cooling device 4 is stopped and the exhaust device is closed.

Specifically, the first pressure threshold is equal to or greater than 10 kpa and equal to or less than 50 kpa; the second pressure threshold is less than or equal to 4 kpa.

It should be noted that, for the pressure cooking appliance, after the cooking process is finished, the pressure reduction is needed to enable the user to open the upper cover 2 of the pressure cooking appliance, so that there is a pressure reduction stage after the cooking process is finished. In this implementation, detect the pressure value of the steam in the cooking cavity through the pressure detector, and at first step-down to first pressure threshold through cooling device 4, in this process, because do not step-down through exhaust apparatus, therefore, the noise can not appear, and fluid food blowout phenomenon can not take place yet, can safely and quietly reduce the pressure in the cooking cavity, and after step-down to first pressure threshold, because the steam pressure value has reduced a lot with the steam pressure value when cooking finishes in the cooking cavity, therefore, even reduce pressure together through cooling device 4 and exhaust apparatus this moment, too big noise can not appear yet, and because the pressure value is lower this moment, fluid food blowout phenomenon can not appear yet, consequently, also can safely and quietly reduce the pressure in the cooking cavity. It can be understood that after the pressure drops to the second pressure threshold, the upper cover 2 can be safely opened, at this time, except that the pressure detector detects that the steam pressure value of the cooking cavity drops to the second pressure threshold, the pressure sensor device can also send an electronic signal to determine that the steam pressure value drops to the second pressure threshold by detecting that the float drops, and this embodiment is not described herein again.

At this time, the control section may be further configured to: the user is prompted to open the upper cover 2 by a set prompting manner, for example, the control part may prompt the user to open the upper cover 2 by sounding a buzzer after stopping the cooling device 4 and closing the exhaust device.

For the solutions shown in fig. 1 or 2, in one possible implementation, the opening strategy of the cooling means and the venting means can be determined according to the type of cooking object. In particular, the pressure cooking appliance further comprises a pressure detector for detecting a pressure value in the cooking cavity;

the control section is further configured to: detecting a cooking object type;

when the type of the cooking object meets a first set condition, after the cooking process is finished, reducing the pressure value in the cooking cavity by using the cooling device 4;

when the pressure detector detects that the pressure value in the cooking cavity is reduced to a first pressure threshold value, the exhaust device is started to reduce the pressure value in the cooking cavity, and the opening state of the cooling device 4 is kept;

when the pressure detector detects that the pressure value in the cooking cavity falls to a second pressure threshold value, the cooling device 4 is stopped and the exhaust device is closed.

Further, the control section is further configured to: when the type of the cooking object meets a second set condition, after the cooking process is finished, simultaneously utilizing the cooling device 4 and starting the exhaust device to reduce the pressure value in the cooking cavity;

when the pressure detector detects that the pressure value in the cooking cavity falls to a second pressure threshold value, the cooling device 4 is stopped and the exhaust device is closed.

If the cooking type with high water content such as porridge cooking, soup cooking and the like is identified, if the exhaust device is started at the beginning, the cooking type is easy to overflow, the cooling device 4 is started first, and the exhaust device is started to reduce the pressure together after the pressure is reduced to a first pressure threshold value; if a cooking type with little moisture, such as rice cooking, dish stewing, etc., is recognized, the cooling device 4 and the exhaust device can be simultaneously started from the beginning after the cooking process is finished.

For the solution shown in fig. 1 or fig. 2, in a possible implementation, the pressure cooking appliance further comprises a pressure detector for detecting a pressure value in the cooking cavity;

the control section is further configured to: receiving a voltage reduction mode selection instruction; and after the cooking process is finished according to the selection instruction, reducing the pressure value in the cooking cavity by using the cooling device 4, and stopping the cooling device 4 when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value.

It should be noted that, the pressure cooking appliance in this embodiment may also determine how to perform pressure reduction through user selection, and after the user selects to perform pressure reduction only through the cooling device 4 through the pressure reduction mode selection instruction, the user may select not to start the exhaust device, so as to reduce noise, and implement silent pressure reduction cooling in the whole process.

Through the pressure cooking utensil of this embodiment, through the step-down stage after the culinary art finishes, control cooling device and exhaust apparatus's the pressure value that stops the steam in the cavity of cooking is reduced to can reduce the pressure in the pressure cooking utensil fast safely and quietly.

It is understood that the pressure cooking appliance according to the embodiment of the present invention may include an electric cooking appliance such as a pressure cooker that uses a liquid to increase its boiling point under high pressure so as not to boil, in addition to a common electric pressure cooker, so as to accelerate the cooking of food.

Example two

Based on the same technical concept as the foregoing embodiment, the embodiment of the present invention provides a control method flow based on the pressure cooking appliance related to the foregoing embodiment, and referring to fig. 3, the control method flow may include:

s301: reducing a pressure value within the cooking cavity using the cooling device and the exhaust device based on a set depressurization strategy.

As shown in fig. 1 or fig. 2 for the pressure cooking appliance, the cooling device further comprises a water inlet and a water outlet, and a driving water pump and a water tank containing the liquid are further arranged in the pot body; the water inlet is connected with a water outlet of the water tank through a water supply pipeline, and the water outlet is connected with a water return port of the water tank through a water return pipeline to form a circulation loop; the driving water pump is used for driving the liquid in the water tank to circularly flow in the circulating loop;

accordingly, for S301, the reducing the pressure value inside the cooking cavity by the cooling device includes:

and sending a starting instruction to the driving water pump, wherein the starting instruction is used for starting the driving water pump to drive the liquid in the water tank to circularly flow in the circulating loop.

In addition, for S301, the reducing, by the exhaust device, the pressure value in the cooking cavity includes:

and sending an opening instruction to the pressure limiting valve, wherein the opening instruction is used for indicating the pressure limiting valve to open the exhaust channel.

For the technical solution shown in fig. 3, in a possible implementation manner, referring to fig. 4, the reducing the pressure value in the cooking cavity by using the cooling device and the exhaust device based on the set pressure reduction strategy includes:

S401: after the cooking process is finished, reducing the pressure value in the cooking cavity by using the cooling device;

s402: when the pressure detector detects that the pressure value in the cooking cavity is reduced to a first pressure threshold value, starting the exhaust device to reduce the pressure value in the cooking cavity, and keeping the cooling device in an opening state;

s403: and when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value, stopping the cooling device and closing the exhaust device.

For the solution shown in fig. 4, the first pressure threshold is greater than or equal to 10 kpa and less than or equal to 50 kpa; the second pressure threshold is less than or equal to 4 kpa.

For the technical solution shown in fig. 3, in a possible implementation manner, the reducing the pressure value in the cooking cavity by using the cooling device and the exhaust device based on the set pressure reduction strategy includes:

detecting a cooking object type;

when the type of the cooking object meets a first set condition, after the cooking process is finished, reducing the pressure value in the cooking cavity by using the cooling device;

when the pressure detector detects that the pressure value in the cooking cavity is reduced to a first pressure threshold value, starting the exhaust device to reduce the pressure value in the cooking cavity, and keeping the cooling device in an opening state;

And when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value, stopping the cooling device and closing the exhaust device.

Furthermore, the method further comprises:

when the type of the cooking object meets a second set condition, after the cooking process is finished, simultaneously utilizing the cooling device and starting the exhaust device to reduce the pressure value in the cooking cavity;

and when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value, stopping the cooling device and closing the exhaust device.

In the present embodiment, if a cooking type with a large amount of water, such as porridge cooking, soup cooking, or the like, is identified, if the exhaust device is started from the beginning, the cooking type is likely to overflow, the cooling device is started first, and the exhaust device is started to reduce the pressure together with the cooling device after the pressure is reduced to the first pressure threshold; if a cooking type with little water, such as rice cooking, dish stewing and the like, is identified, the cooling device and the exhaust device can be started at the same time from the beginning of the cooking process.

For the technical solution shown in fig. 3, in a possible implementation manner, the reducing the pressure value in the cooking cavity by using the cooling device and the exhaust device based on the set pressure reduction strategy includes:

Receiving a voltage reduction mode selection instruction;

and after the cooking process is finished according to the selection instruction, reducing the pressure value in the cooking cavity by using the cooling device, and stopping the cooling device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value.

It should be noted that, the pressure cooking appliance in this embodiment may also determine how to perform pressure reduction through user's selection, and after the user selects to perform pressure reduction only through the cooling device through the pressure reduction mode selection instruction, the user may select not to start the exhaust device, so as to reduce noise, and implement mute pressure reduction cooling in the whole course.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (11)

1. A pressure cooking appliance, characterized in that it comprises: the pot body, the upper cover and the cover plate; the upper cover and the cover plate form a pot cover; an inner container is arranged in the pot body, and a cooking cavity is formed by the inner container and the upper cover; the cover plate is provided with a cooling device, the cooling device is directly contacted with the cooking cavity, and liquid for exchanging heat with the cooking cavity is contained in the cooling device;

The pressure cooking appliance further comprises an exhaust device comprising: an exhaust passage arranged on the cooker cover and communicated with the inner part of the inner cooker and a pressure limiting valve for controlling the opening and closing of the exhaust passage;

the pressure cooking appliance further comprises a control part configured to reduce a pressure value in the cooking cavity by using the cooling device and the exhaust device based on a set pressure reduction strategy;

the pressure cooking appliance further comprises a pressure detector for detecting a pressure value in the cooking cavity;

the control section is further configured to: detecting a cooking object type;

when the type of the cooking object meets a first set condition, after the cooking process is finished, reducing the pressure value in the cooking cavity by using the cooling device; when the pressure detector detects that the pressure value in the cooking cavity is reduced to a first pressure threshold value, starting the exhaust device to reduce the pressure value in the cooking cavity, and keeping the cooling device in an opening state; stopping the cooling device and closing the exhaust device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value; the first set condition represents that the type of the cooking object is a type with more water;

When the type of the cooking object meets a second set condition, after the cooking process is finished, simultaneously utilizing the cooling device and starting the exhaust device to reduce the pressure value in the cooking cavity; stopping the cooling device and closing the exhaust device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value; the second set condition represents that the type of the cooking object is a type with less moisture.

2. The pressure cooking appliance of claim 1, wherein the cooling device further comprises a water inlet and a water outlet, and a drive water pump and a water tank containing the liquid are further arranged in the pot body; the water inlet is connected with a water outlet of the water tank through a water supply pipeline, and the water outlet is connected with a water return port of the water tank through a water return pipeline to form a circulation loop; the driving water pump is used for driving the liquid in the water tank to circularly flow in the circulating loop.

3. The pressure cooking appliance according to claim 2, wherein the control section is configured to send an activation instruction to the drive water pump, the activation instruction being for activating the drive water pump to drive the liquid in the water tank to circulate in the circulation circuit.

4. Pressure cooking appliance according to claim 1, characterized in that the control part is configured to send an opening instruction to the pressure limiting valve, the opening instruction being used to instruct the pressure limiting valve to open the exhaust channel.

5. Pressure cooking appliance according to claim 1, characterized in that the first pressure threshold is greater than or equal to 10 kpa and less than or equal to 50 kpa; the second pressure threshold is less than or equal to 4 kpa.

6. The pressure cooking appliance of claim 1, wherein the control portion is further configured to: receiving a voltage reduction mode selection instruction; and after the cooking process is finished according to the selection instruction, reducing the pressure value in the cooking cavity by using the cooling device, and stopping the cooling device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value.

7. A control method, characterized in that it is applied to a pressure cooking appliance comprising: the pot body, the upper cover and the cover plate; the upper cover and the cover plate form a pot cover; an inner container is arranged in the pot body, and a cooking cavity is formed by the inner container and the upper cover; the cover plate is provided with a cooling device, the cooling device is directly contacted with the cooking cavity, and liquid for exchanging heat with the cooking cavity is contained in the cooling device; the pressure cooking appliance further comprises an exhaust device comprising: an exhaust passage arranged on the cooker cover and communicated with the inner part of the inner cooker and a pressure limiting valve for controlling the opening and closing of the exhaust passage; the pressure cooking appliance further comprises a pressure detector for detecting a pressure value in the cooking cavity; the method comprises the following steps:

Reducing a pressure value within the cooking cavity with the cooling device and the exhaust device based on a set pressure reduction strategy, comprising:

detecting a type of the cooking object;

when the type of the cooking object meets a first set condition, after the cooking process is finished, reducing the pressure value in the cooking cavity by using the cooling device; the first set condition represents that the type of the cooking object is a type with more water; when the pressure detector detects that the pressure value in the cooking cavity is reduced to a first pressure threshold value, starting the exhaust device to reduce the pressure value in the cooking cavity, and keeping the cooling device in an opening state; stopping the cooling device and closing the exhaust device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value;

when the type of the cooking object meets a second set condition, after the cooking process is finished, simultaneously utilizing the cooling device and starting the exhaust device to reduce the pressure value in the cooking cavity; stopping the cooling device and closing the exhaust device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value; the second set condition represents that the type of the cooking object is a type with less moisture.

8. The method according to claim 7, wherein the cooling device further comprises a water inlet and a water outlet, and a driving water pump and a water tank containing the liquid are arranged in the pot body; the water inlet is connected with a water outlet of the water tank through a water supply pipeline, and the water outlet is connected with a water return port of the water tank through a water return pipeline to form a circulation loop; the driving water pump is used for driving the liquid in the water tank to circularly flow in the circulating loop;

accordingly, the reducing the pressure value within the cooking cavity with the cooling device comprises:

and sending a starting instruction to the driving water pump, wherein the starting instruction is used for starting the driving water pump to drive the liquid in the water tank to circularly flow in the circulating loop.

9. The method of claim 7, wherein reducing the pressure value within the cooking cavity using the vent comprises:

and sending an opening instruction to the pressure limiting valve, wherein the opening instruction is used for indicating the pressure limiting valve to open the exhaust channel.

10. The method according to claim 7, characterized in that the first pressure threshold is greater than or equal to 10 kpa and less than or equal to 50 kpa; the second pressure threshold is less than or equal to 4 kpa.

11. The method of claim 7, wherein the reducing the pressure value within the cooking cavity using the cooling device and the exhaust device based on the set depressurization strategy comprises:

receiving a voltage reduction mode selection instruction;

and after the cooking process is finished according to the selection instruction, reducing the pressure value in the cooking cavity by using the cooling device, and stopping the cooling device when the pressure detector detects that the pressure value in the cooking cavity is reduced to a second pressure threshold value.

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