Control method of pressure cooking utensil and pressure cooking utensil

Abstract

The invention discloses a control method of a pressure cooking utensil and the pressure cooking utensil. The control method comprises the steps that after the heating device works, cooking parameters of a cooking cavity are obtained, and the cooking parameters comprise first pressure related parameters; when the cooking cavity is in the pressure boosting stage and the first pressure related parameter reaches an anti-overshoot set value, the pressure cooking utensil is controlled to enter an anti-overshoot working stage, and in the anti-overshoot working stage, the draught fan is controlled to start working. In the anti-overshoot working stage, the draught fan is started for cooling, the thermal inertia influence of the heating device in the product cooking process is counteracted, then pressure overshoot is prevented, the pressure cooking utensil can meet the requirements for rapid cooking and precise pressure control, the situation that the actual cooking pressure of a product exceeds the pressure set by a user or the cooking pressure required by food is avoided, and the user experience is improved. The taste of food is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and in particular to a control method for a pressure cooking appliance and the pressure cooking appliance. Background Art

[0002] The conventional heating method of pressure cooking appliances is that the heating device generates heat which is first transferred to the inner pot in contact with the electric heating plate, and then to the food in the inner pot. However, during the heating process, due to the thermal inertia of the heating device itself, for example, the electric heating plate will store a large amount of heat during the heating process, and the electric heating plate will continue to heat the inner pot for a period of time even after a power outage. Therefore, due to the thermal inertia of the heating device, there will be a pressure overshoot phenomenon where the cooking pressure exceeds the working target pressure. Pressure overshoot will cause the actual cooking pressure of the product to exceed the pressure set by the user or the cooking pressure required by the food, thereby affecting the taste of the food and user experience. Summary of the invention

[0003] The main purpose of the present invention is to provide a control method for a pressure cooking appliance and a pressure cooking appliance, aiming to prevent the pressure overshoot phenomenon of the pressure cooking appliance.

[0004] To achieve the above object, the present invention provides a control method for a pressure cooking appliance, the pressure cooking appliance comprising a heating container, a heating device, a fan, a detection device and a control device, the heating container having a cooking cavity, the heating device for heating the cooking cavity, the fan for blowing air into the heating container, the detection device for detecting cooking parameters of the cooking cavity, the control device being electrically connected to the heating device, the fan and the detection device;

[0005] The control method of the pressure cooking appliance comprises:

[0006] After the heating device is working, obtaining cooking parameters of the cooking cavity, wherein the cooking parameters include a first pressure-related parameter;

[0007] When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage, and in the anti-overshoot working stage, the fan is controlled to start working.

[0008] Optionally, the first pressure-related parameter comprises pressure or temperature.

[0009] Optionally, when the cooking cavity is in the pressure increasing stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the method further includes:

[0010] Get the amount of food in the cooking chamber;

[0011] According to the amount of food in the cooking cavity, first operating parameters of the fan and the heating device in the anti-overshoot working stage are determined.

[0012] Optionally, the step of obtaining the amount of food in the cooking cavity includes:

[0013] Performing a first timing from the start of the heating device to the anti-overshoot working stage;

[0014] The amount of food in the cooking cavity is obtained according to the value of the first timing.

[0015] Optionally, in the overshoot prevention stage, the fan and the heating device are controlled to operate in a first alternating manner with first operating parameters.

[0016] Optionally, the first operating parameter of the fan includes the power of the fan and the duration of a single working cycle;

[0017] The first working parameter of the heating device includes the duration of a single working cycle of the heating device.

[0018] Optionally, when the cooking cavity is in the pressure increasing stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the method further includes:

[0019] Get the amount of food in the cooking chamber;

[0020] The anti-overshoot setting value is determined according to the food amount.

[0021] Optionally, the cooking parameters further include a second pressure-related parameter;

[0022] When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the step further includes:

[0023] When the cooking cavity is in the heating stage and when the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage, and in the cold air exhaust working stage, the fan is controlled to start working.

[0024] Optionally, the second pressure-related parameter comprises pressure or temperature.

[0025] Optionally, when the cooking cavity is in the temperature rising stage and the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan to start working, the method further includes:

[0026] Get the amount of food in the cooking chamber;

[0027] According to the amount of food in the cooking cavity, second operating parameters of the fan and the heating device in the cold air exhaust working stage are determined.

[0028] Optionally, in the cold air exhaust working stage, the fan and the heating device are controlled to work in a second alternating manner with second working parameters.

[0029] Optionally, the second operating parameter of the fan includes the power of the fan and the duration of a single working cycle;

[0030] The second working parameter of the heating device includes the duration of a single working cycle of the heating device.

[0031] Optionally, when the cooking cavity is in the temperature rising stage and the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan to start working, the method further includes:

[0032] Get the amount of food in the cooking chamber;

[0033] The cold air exhaust setting value is determined according to the amount of food in the cooking cavity.

[0034] Optionally, the cooking parameter includes a cooking cavity temperature value;

[0035] When the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan to start working, the step further includes:

[0036] The heating device is turned on to work until the temperature of the cooking cavity reaches a first set temperature value, and a second timing is performed;

[0037] The amount of food in the cooking cavity is obtained according to the value of the second timing.

[0038] Optionally, the cooking parameters further include a third pressure-related parameter;

[0039] When the temperature-related parameter reaches the cold air exhaust setting value, the pressure cooking device is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, after the step of controlling the fan to start working, and when the cooking cavity is in the pressure increase stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking device is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the method further includes:

[0040] When the third pressure-related parameter reaches the pressure boost setting value, the pressure cooking appliance is controlled to enter the pressure boost stage, and a third timing is performed from the start of the heating device to the pressure boost stage;

[0041] Obtaining the amount of food in the cooking cavity according to the value of the third timing;

[0042] The anti-overshoot setting value is determined according to the food amount.

[0043] Optionally, the third pressure-related parameter comprises pressure or temperature.

[0044] Optionally, the cooking parameters further include a fourth pressure-related parameter;

[0045] When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, after the step of controlling the fan to start working, the method further includes:

[0046] When the fourth pressure-related parameter reaches the pressure-maintaining target value, the pressure cooking appliance is controlled to enter the pressure-maintaining stage. During the pressure-maintaining stage, the heating device and the fan are controlled to operate with the fourth working parameter so that the pressure in the cooking cavity is between the maximum pressure and the minimum pressure.

[0047] Optionally, the fourth pressure-related parameter comprises pressure or temperature.

[0048] Optionally, before the step of controlling the pressure cooking appliance to enter a pressure holding stage when the fourth pressure-related parameter reaches a pressure holding target value, and controlling the heating device and the fan to operate at a fourth operating parameter during the pressure holding stage so that the pressure in the cooking cavity is between a maximum pressure value and a minimum pressure value, the method further includes:

[0049] Performing a fourth timing from the start of the heating device to the pressure-maintaining stage;

[0050] Obtaining the amount of food in the cooking cavity according to the value of the fourth timing;

[0051] According to the amount of food, fourth operating parameters of the fan and the heating device in the pressure holding stage are determined.

[0052] Another aspect of the present invention provides a pressure cooking device, the pressure cooking device comprising:

[0053] A heating container having a cooking cavity;

[0054] A heating device, disposed on the heating container, for heating the cooking cavity;

[0055] A fan, provided on the heating container, for blowing air toward the heating container;

[0056] a detection device for detecting cooking parameters of the cooking cavity, and

[0057] A control device is electrically connected to the heating device, the fan, and the detection device, and includes a memory, a processor, and a control program for the pressure cooking appliance stored in the memory and executable on the processor, wherein the control program for the pressure cooking appliance is configured to implement the steps of the control method for the pressure cooking appliance.

[0058] In the technical solution of the present invention, when the cooking chamber is in the pressure boosting stage and the first pressure-related parameter reaches the anti-overshoot set value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, the fan is turned on for cooling to offset the influence of the thermal inertia of the heating device during the cooking process of the product, thereby preventing pressure overshoot, so that the pressure cooking appliance can meet the needs of fast cooking and precise pressure control, and avoid the problem that the actual cooking pressure of the product exceeds the pressure set by the user or the cooking pressure required by the food, affecting the taste of the food. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0060] Figure 1 A schematic diagram of an embodiment of a pressure cooking device provided by the present invention;

[0061] Figure 2 A schematic diagram of the structure of a control device for a hardware operating environment involved in an embodiment of the present invention;

[0062] Figure 3 A schematic flow chart of an embodiment of a control method for a pressure cooking appliance provided by the present invention;

[0063] Figure 4A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0064] Figure 5 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0065] Figure 6 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0066] Figure 7 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0067] Figure 8 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0068] Fig. 9 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0069] Fig.10 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0070] Fig.11 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0071] Fig.12 A flow chart of another embodiment of the control method of the pressure cooking appliance provided by the present invention;

[0072] Fig.13 A pressure-time diagram in a cooking cavity of an embodiment of a control method for a pressure cooking appliance provided by the present invention.

[0073] Description of Figure Numbers:

[0074]

[0075]

[0076] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0078] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0079] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0080] The conventional heating method of pressure cooking appliances is that the heating device generates heat which is first transferred to the inner pot in contact with the electric heating plate, and then to the food in the inner pot. However, during the heating process, due to the thermal inertia of the heating device itself, for example, the electric heating plate will store a large amount of heat during the heating process, and the electric heating plate will continue to heat the inner pot for a period of time even after a power outage. Therefore, due to the thermal inertia of the heating device, there will be a pressure overshoot phenomenon where the cooking pressure exceeds the working target pressure. Pressure overshoot will cause the actual cooking pressure of the product to exceed the pressure set by the user or the cooking pressure required by the food, thereby affecting the taste of the food and user experience.

[0081] In view of this, the present invention provides a control method of a pressure cooking device and a pressure cooking device. Figure 1 and Figure 2 An embodiment of the pressure cooking device provided by the present invention, Figures 3 to 13 This is an embodiment of a method for controlling a pressure cooking appliance provided by the present invention.

[0082] See also Figure 1 The pressure cooking device 100 proposed by the present invention includes a heating container 1, a heating device 2, a fan 3, a detection device and a control device. The heating container 1 has a cooking cavity. The heating device 2 is used to heat the cooking cavity. The fan 3 is used to blow air into the heating container 1. The detection device is used to detect cooking parameters of the cooking cavity. The control device is electrically connected to the heating device 2, the fan 3 and the detection device.

[0083] The embodiment of the present invention does not limit the specific form of the heating device 2, which can be a hot plate, electromagnetic heating technology, heat-generating belt, resistance wire, infrared, etc. It should be understood that the heating device 22 can mainly heat the cooking cavity, and different heating forms can be set at different positions accordingly, and the present invention does not limit this.

[0084] It should be noted that, in one embodiment of the present invention, the heating container 1 includes an inner tank, and the space enclosed by the inner tank forms a cooking cavity. The air outlet end of the fan 3 faces the inner tank of the heating container 1 to cool down and reduce the pressure of the cooking cavity. In this embodiment, the cooking cavity is cooled and reduced in pressure by blowing air to the outer wall of the inner tank. The fan 3 can be set at any position according to different product space limitations.

[0085] It can be understood that the detection device is used to detect the cooking parameters of the cooking cavity. The cooking parameters may include parameters such as the temperature in the cooking cavity and the pressure in the cooking cavity. The temperature in the cooking cavity can be detected by the temperature detection device, so a temperature detection device can be set in the cooking cavity. The pressure in the cooking cavity can be detected by the pressure detection device, so a pressure detection device can be set in the cooking cavity. The temperature detection device and the pressure detection device can be set at any position in the cooking cavity according to different product space limitations.

[0086] The pressure cooking appliance 100 also includes a control device, and the heating device 2, the fan 3 and the detection device are all electrically connected to the control device. The control device includes a memory, a processor and a control program of the pressure cooking appliance stored in the memory and executable on the processor. The control program of the pressure cooking appliance is configured to implement the steps of the control method of the cooking appliance.

[0087] Reference Figure 2 , Figure 2 The figure is a schematic diagram of the structure of the control device of the hardware operating environment involved in the embodiment of the present invention.

[0088] like Figure 2 As shown, the control device may include: a processor 1001, such as a central processing unit, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen, an input unit such as a keyboard, and the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface). The memory 1005 may be a high-speed random access memory, or a stable non-volatile memory, such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0089] Those skilled in the art will understand that Figure 2 The structure shown in the figure does not constitute a limitation on the control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0090] like Figure 2 As shown, the memory 1005 as a storage medium may include an operating system, a network communication device, a user interface device, and a control program for a cooking appliance.

[0091] exist Figure 2 In the control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the control device of the present invention can be set in the control device, and the control device calls the control program of the cooking appliance stored in the memory 1005 through the processor 1001, and executes the control method of the pressure cooking appliance provided in the embodiment of the present invention.

[0092] The embodiment of the present invention provides a control method for a pressure cooking appliance, referring to Figure 3 , Figure 3 The present invention is a flow chart of a control method for a pressure cooking appliance according to an embodiment of the present invention.

[0093] The control method of the pressure cooking device comprises the following steps:

[0094] SY10: After the heating device 2 starts working, the cooking parameters of the cooking cavity are obtained, and the cooking parameters include the first pressure-related parameters.

[0095] The first pressure-related parameter may be pressure, temperature or other pressure-related parameters associated with pressure. Regardless of pressure, temperature or other pressure-related parameters associated with pressure, they can all reflect the pressure state in the cooking pot.

[0096] SY20: When the cooking chamber is in the pressure-increasing stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking appliance 100 is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, the fan 3 is controlled to start working.

[0097] It should be noted that when the cooking chamber is in the pressure boost stage, the cooking chamber is in a stage where the pressure continues to rise, and pressure overshoot usually occurs in this stage. The anti-overshoot setting value can be determined in a variety of ways. For example, the anti-overshoot setting value can be determined as a certain value that is less than the target pressure set by the user (or the cooking pressure required for the food). The anti-overshoot setting value can also be determined as a value related to the amount of ingredients based on the amount of ingredients.

[0098] In the technical solution of the present invention, when the cooking chamber is in the pressure boosting stage and the first pressure-related parameter reaches the anti-overshoot set value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, the fan is turned on for cooling to offset the influence of the thermal inertia of the heating device during the cooking process of the product, thereby preventing pressure overshoot, so that the pressure cooking appliance can meet the needs of fast cooking and precise pressure control, and avoid the problem that the actual cooking pressure of the product exceeds the pressure set by the user or the cooking pressure required by the food, affecting the taste of the food.

[0099] See also Figure 4 , Figure 4 The figure is a flow chart of another embodiment of a control method for a pressure cooking appliance of the present invention.

[0100] When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking device 100 is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan 3 to start working, the method further includes:

[0101] S101a: Obtaining the amount of food in the cooking chamber.

[0102] The amount of food in the cooking cavity can be obtained in a variety of ways. For example, it can be obtained by weighing before the food is loaded into the cooking cavity, or it can be obtained after the food is loaded into the cooking cavity. After the food is loaded into the cooking cavity, it can be obtained by a weight sensor, timer, and other methods. The present invention does not impose specific limitations on this.

[0103] S102a: Determine first working parameters of the fan 3 and the heating device 2 in the anti-overshoot working stage according to the amount of food in the cooking chamber.

[0104] The first working parameters of the fan 3 and the heating device 2 are related to the specific forms of the fan 3 and the heating device 2, and the present invention does not impose specific restrictions on this. For example, when the heating device 2 is a heating belt, its working mode is usually adjustable in power, and the first working parameter of the heating device 2 can be power at this time. When the heating device 2 is a hot plate, the working mode of the hot plate is usually adjustable in heating ratio. The heating ratio is the ratio of the heating time of the heating device 2 to the stopping time of heating the cooking cavity, and the first working parameter can be the heating ratio at this time. When the fan 3 is a fan assembly, the first working parameter of the fan 3 can be power or wind speed. Specifically, in the anti-overshoot stage, when the fan 3 is turned on, the heating device 2 can remain in the turned-on state, and the power of the heating device 2 can be reduced. Alternatively, when the fan 3 is turned on, the heating device 2 can be turned off, that is, the heating device 2 and the fan 3 are turned on alternately. The alternating opening method is described in the subsequent embodiments.

[0105] Therefore, the on-demand operation of the fan 3 and the heating device 2 during the overcharge prevention working stage can be determined according to different amounts of food materials to avoid energy waste.

[0106] In an embodiment of the present invention, step S101a may specifically include: performing a first timing from when the heating device 2 is turned on to when the overshoot prevention working stage is reached; and obtaining the amount of food in the cooking chamber according to the value of the first timing.

[0107] In this embodiment, the amount of food to be cooked is determined based on the timing duration. The larger the amount of food, the longer it takes to cook the food to the target pressure. There is a correlation between the operating parameters of the heating device 2 and the fan 3 in the overshoot prevention stage and the amount of food. Therefore, by recording the first timing, the amount of food can be determined, and there is no need to set up an additional detection device to detect the amount of food.

[0108] In one embodiment of the present invention, in the overshoot prevention stage, the fan 3 and the heating device 2 are controlled to operate in a first alternating manner with a first operating parameter.

[0109] In this embodiment, the fan 3 and the heating device 2 work in the first alternating mode, that is, when the heating device 2 is turned on, the fan 3 stops working, and when the fan 3 is turned on, the heating device 2 stops working. Thus, the fan 3 and the heating device 2 work alternately, and when the heating device 2 stops working, the fan 3 is turned on to offset the thermal inertia of the heating device 2.

[0110] In one embodiment of the present invention, the first operating parameter of the fan 3 includes the power of the fan 3 and the duration of a single working cycle; the first operating parameter of the heating device 2 includes the duration of a single working cycle of the heating device.

[0111] It should be noted that the duration of a single working cycle of the heating device 2 can be achieved by adjusting the heating ratio of the heating device 2. Thus, the heating device 2 heats the cooking cavity intermittently. For example, the heating ratio of the heating device 2 is 16 / 30, and the duration of a single working cycle is 16 seconds, and the heating stop time is 14 seconds. Similarly, the duration of a single working cycle of the fan 3 can also refer to the time during which the fan is turned on within a cycle. The fan 3 and the heating device 2 work in a first alternating manner with the first working parameter. For example, when the heating ratio of the heating device 2 is 16 / 30, the heating device 2 is first heated for 16 seconds, followed by the fan 3 being turned on for 14 seconds, and then the heating device 2 is heated for 16 seconds, followed by the fan 3 being turned on for 14 seconds, and the process is repeated alternately in sequence, so that the fan 3 is turned on when the heating device 2 stops heating.

[0112] See also Figure 5In one embodiment of the present invention, when the cooking chamber is in the pressure increasing stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking device 100 is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan 3 to start working, the step further includes:

[0113] S101b: Obtaining the amount of food in the cooking chamber.

[0114] The amount of food in the cooking cavity can be obtained in a variety of ways. For example, it can be obtained by weighing before the food is loaded into the cooking cavity, or it can be obtained after the food is loaded into the cooking cavity. After the food is loaded into the cooking cavity, it can be obtained by a weight sensor, timer, and other methods. The present invention does not impose specific limitations on this.

[0115] S102b: Determine the anti-overshoot setting value according to the food quantity.

[0116] Due to different amounts of food, the cooking heat and cooking pressure required in the pressure boost stage are different. By determining the anti-overshoot setting value based on the different amounts of food, the node that can offset thermal inertia can be determined more accurately, so as to more accurately achieve the cooking pressure to quickly reach the target pressure without overcharging.

[0117] See also Figure 6 In one embodiment of the present invention, the cooking parameter further includes a second pressure-related parameter; when the cooking chamber is in the pressure-increasing stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking device 100 is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan 3 to start working, the method further includes:

[0118] SW10: When the cooking cavity is in the heating stage and when the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance 100 is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, the fan 3 is controlled to start working.

[0119] The second pressure-related parameter may be pressure or temperature. For example, the second pressure-related parameter may be temperature, and the exhaust air setting value may be any value between 85°C and 105°C.

[0120] It should be noted that when the cooking chamber is in the heating stage, there are air holes on the float valve of the pressure cooking appliance that are connected to the outside world. When the second pressure-related parameter reaches the set value for exhausting cold air, the fan is turned on to make the water in the pot boil intermittently, so that the cold air in the pot can be exhausted, making the temperature field of the air and food in the pot uniform, so as to facilitate precise pressure control in the subsequent stages.

[0121] See also Figure 7In one embodiment of the present invention, when the cooking cavity is in the temperature rising stage and the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking device 100 is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan 3 to start working, it also includes:

[0122] S201a: Obtaining the amount of food in the cooking chamber.

[0123] The amount of food in the cooking cavity can be obtained in a variety of ways. For example, it can be obtained by weighing before the food is loaded into the cooking cavity, or it can be obtained after the food is loaded into the cooking cavity. After the food is loaded into the cooking cavity, it can be obtained by a weight sensor, timer, and other methods. The present invention does not impose specific limitations on this.

[0124] S202a: Determine second operating parameters of the fan 3 and the heating device 2 in the cold air exhausting working stage according to the amount of food in the cooking cavity.

[0125] The second operating parameters of the fan 3 and the heating device 2 are related to the specific forms of the fan 3 and the heating device 2, and the present invention does not impose specific restrictions on this. For example, when the heating device 2 is a heat-generating belt, its working mode is usually adjustable power, and the second operating parameter of the heating device 2 can be power at this time. When the heating device 2 is a hot plate, the working mode of the hot plate is usually adjustable heating ratio. The heating ratio is the ratio of the heating time of the heating device 2 to the stopping time of the cooking cavity. The second operating parameter can be the heating ratio at this time. When the fan 3 is a fan assembly, the second operating parameter of the fan 3 can be power or wind speed, etc.

[0126] In one embodiment of the present invention, in the cold air exhaust working stage, the fan 3 and the heating device 2 are controlled to work in a second alternating manner with second working parameters.

[0127] In this embodiment, the fan 3 and the heating device 2 work in the second alternating mode, that is, when the heating device 2 is turned on, the fan 3 stops working, and when the fan 3 is turned on, the heating device 2 stops working. Thus, the fan 3 and the heating device 2 work alternately, and when the heating device 2 stops working, the fan 3 is turned on to cool down the cooking cavity, so that the water in the pot boils intermittently, and the cold air in the pot can be discharged.

[0128] In one embodiment of the present invention, the second operating parameter of the fan 3 includes the power of the fan 3 and the duration of a single working cycle; the second operating parameter of the heating device 2 includes the duration of a single working cycle of the heating device.

[0129] Similar to the above, the duration of a single working cycle of the heating device 2 can be achieved by adjusting the heating ratio of the heating device 2. The heating ratio is the ratio of the heating time of the heating device 2 to the time when the heating device 2 stops heating the cooking cavity. The duration of a single working cycle of the fan 3 can also refer to the time when the fan is turned on within a cycle. Thus, the heating device 2 heats the cooking cavity intermittently, and the fan 3 is turned on when the heating device 2 stops heating.

[0130] See also Figure 8 In one embodiment of the present invention, when the cooking cavity is in the temperature rising stage and the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking device 100 is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan 3 to start working, it also includes:

[0131] S201b: Obtain the amount of food in the cooking chamber.

[0132] The amount of food in the cooking cavity can be obtained in a variety of ways. For example, it can be obtained by weighing before the food is loaded into the cooking cavity, or it can be obtained after the food is loaded into the cooking cavity. After the food is loaded into the cooking cavity, it can be obtained by a weight sensor, timer, and other methods. The present invention does not impose specific limitations on this.

[0133] S202b: Determine the cold air exhaust setting value according to the amount of food in the cooking chamber.

[0134] Due to different amounts of food, the cooking heat required to heat the water in the cooking chamber to boil is different. By determining the cold air exhaust setting value according to different amounts of food, cold air can be discharged more accurately.

[0135] See also Fig. 9 , in one embodiment of the present invention, the cooking parameter includes a cooking cavity temperature value;

[0136] When the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance 100 is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan 3 to start working, the step further includes:

[0137] S201c, starting the heating device 2 to work until the temperature of the cooking cavity reaches a first set temperature value, and performing a second timing.

[0138] In this embodiment, the amount of food to be cooked is determined based on the timing duration. The larger the amount of food, the longer it takes to cook the food to the target temperature. There is a correlation between the cooking time and the amount of food.

[0139] S202c: Obtain the amount of food in the cooking chamber according to the second timing value.

[0140] Therefore, by recording the second timing, the amount of food can be judged, and there is no need to set up an additional detection device to detect the amount of food.

[0141] See also Fig.10 , in one embodiment of the present invention, the cooking parameters further include a third pressure-related parameter;

[0142] When the temperature-related parameter reaches the cold air exhaust setting value, the pressure cooking device 100 is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, after the step of controlling the fan 3 to start working, and when the cooking cavity is in the pressure increase stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking device 100 is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan 3 to start working, the method further includes:

[0143] SY00: When the third pressure-related parameter reaches the boost setting value, the pressure cooking appliance 100 is controlled to enter the boost stage, and the heating device 2 is turned on to work until the boost stage for a third timing; according to the value of the third timing, the amount of food in the cooking cavity is obtained; according to the amount of food, the anti-overshoot setting value is determined.

[0144] The third pressure-related parameter includes pressure or temperature, so by recording the third timing, the amount of food can be judged, and there is no need to set up an additional detection device to detect the amount of food. The method of timing the time from the start of the heating device 2 to the pressure increase stage to obtain the amount of food takes into account the possible change in the amount of food during the cooking process, so that the amount of food can be estimated more accurately, and the anti-overshoot setting value can be determined more accurately.

[0145] See also Fig.11 , in one embodiment of the present invention, the cooking parameters further include a fourth pressure-related parameter;

[0146] When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking device 100 is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, after the step of controlling the fan 3 to start working, the method further includes:

[0147] SB10: When the fourth pressure-related parameter reaches the pressure-maintaining target value, the pressure cooking appliance 100 is controlled to enter the pressure-maintaining stage. During the pressure-maintaining stage, the heating device 2 and the fan 3 are controlled to operate with the fourth working parameter so that the pressure in the cooking cavity is between the maximum pressure and the minimum pressure.

[0148] In the pressure-holding stage, the fourth pressure-related parameter includes pressure and temperature. Exemplarily, when the fourth pressure-related parameter is pressure, controlling the heating device 2 and the fan 3 to work at the fourth working parameter means that the heating device 2 and / or the fan 3 are operated at the fourth working parameter when the heating device 2 and / or the fan 3 are turned on. Exemplarily, if the current pressure PrCur in the cooking cavity is greater than or equal to the maximum pressure PrTargetH, the heating device 2 is turned off to stop heating, and the fan 3 is turned on according to the fourth working parameter; when the pressure PrCur in the pot drops to the minimum pressure PrTargetL, the fan 3 is turned off, and the heating device 2 is controlled to heat according to the fourth working parameter; when PrCur is between PrTargetH and PrTargetL, the heating device 2 is turned off to stop heating, and the fan 3 is turned off.

[0149] See also Fig.12 In one embodiment of the present invention, when the fourth pressure-related parameter reaches the pressure-maintaining target value, the pressure cooking device 100 is controlled to enter the pressure-maintaining stage. During the pressure-maintaining stage, the heating device 2 and the fan 3 are controlled to work at the fourth working parameter so that the pressure in the cooking cavity is between the maximum pressure value and the minimum pressure value, before the step, the method further includes:

[0150] S301: starting the heating device 2 to work until the pressure-maintaining stage for a fourth time.

[0151] S302: Obtaining the amount of food in the cooking chamber according to the value of the fourth timing.

[0152] The method of timing the time from when the heating device 2 is turned on to when the pressure is maintained to obtain the amount of food is to take into account the possible changes in the amount of food during the cooking process, so that the amount of food can be estimated more accurately. In addition, by recording the fourth timing, the amount of food can be judged, so there is no need to set up an additional detection device to detect the amount of food.

[0153] S303: Determine fourth operating parameters of the fan 3 and the heating device 2 in the pressure holding stage according to the amount of food.

[0154] The specific implementation of the control method of the pressure cooking device of the present invention is described below with a specific embodiment.

[0155] See also Fig.13 In the embodiment of the present invention, the working stages of the pressure cooking device include: a temperature rising stage, a cold air exhausting stage, a pressure rising stage, an overshoot prevention stage and a pressure maintaining stage.

[0156] Heating stage: Turn on heating device 2 and enter the heating stage.

[0157] Cooling working stage:

[0158] When the cooking cavity is in the temperature rising stage and when the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking device 100 is controlled to enter the cold air exhaust working stage.

[0159] When the heating device 2 is turned on and the temperature of the cooking cavity reaches the first set temperature value, a second timing is performed, and the amount of food in the cooking cavity is obtained according to the second timing value. According to the amount of food in the cooking cavity, the second working parameters of the fan 3 and the heating device 2 in the cold air exhaust working stage are determined.

[0160] In the cold air exhaust working stage, the fan 3 is controlled to start working, and the fan 3 and the heating device 2 work alternately with the second working parameters.

[0161] Exemplarily, the following Table 1 shows the relationship between the second timing, the amount of food, the heating device and the second parameter of the fan.

[0162] Table 1

[0163] Second Timing [0,200) [200,330) [330,480) [480,720) [720,+∞) Ingredient quantity level 1 2 3 4 5 Heating device power ratio 10 / 16 11 / 16 12 / 16 13 / 16 14 / 16 Fan speed 2700 3000 3300 3600 4000

[0164] Pressure boost stage: When the third pressure-related parameter reaches the pressure boost setting value, the pressure cooking appliance 100 is controlled to enter the pressure boost stage, and the heating device 2 is turned on to work until the pressure boost stage for a third timing; according to the third timing value, the amount of food in the cooking cavity is obtained; according to the amount of food, the anti-overshoot setting value is determined.

[0165] Exemplarily, the following Table 2 shows the relationship between the third timing, the amount of food, and the anti-overshoot setting value.

[0166] Table 2

[0167]

[0168] Anti-overshoot stage:

[0169] When the cooking cavity is in the pressure increasing stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking appliance 100 is controlled to enter the anti-overshoot working stage.

[0170] A first timing is performed from the start of the heating device 2 to the anti-overshoot working stage; the amount of food in the cooking cavity is obtained according to the first timing value. According to the amount of food in the cooking cavity, the first working parameters of the fan 3 and the heating device 2 in the anti-overshoot working stage are determined.

[0171] In the anti-overshoot working stage, the fan 3 and the heating device 2 are controlled to work in a first alternating manner with a first working parameter.

[0172] Exemplarily, the following Table 3 shows the relationship between the first timing, the amount of food, the heating device and the first parameter of the fan.

[0173] Table 3

[0174]

[0175] Pressure holding stage:

[0176] (1) When the fourth pressure-related parameter reaches the pressure-maintaining target value, the pressure cooking appliance 100 is controlled to enter the pressure-maintaining stage.

[0177] (2) A fourth timing is performed from when the heating device 2 is turned on to when the pressure-maintaining stage is reached, and based on the fourth timing value, the amount of food in the cooking chamber is obtained, and based on the amount of food, fourth operating parameters of the fan 3 and the heating device 2 during the pressure-maintaining stage are determined.

[0178] (3) During the pressure-maintaining stage, the heating device 2 and the fan 3 are controlled to operate at a fourth operating parameter so that the pressure in the cooking chamber is between a maximum pressure value and a minimum pressure value.

[0179] Exemplarily, the following Table 4 shows the relationship between the fourth timing, the amount of food, the fan 3 and the fourth working parameter of the heating device 2.

[0180] Table 4

[0181]

[0182] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0183] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0184] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0185] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (RAM, disk, optical disk), including a number of instructions for a terminal device to execute the methods described in each embodiment of the present invention.

[0186] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for controlling a pressure cooking device, characterized in that: The pressure cooking device comprises a heating container, a heating device, a fan, a detection device and a control device, wherein the heating container has a cooking cavity, the heating device is used to heat the cooking cavity, the fan is used to blow air to the heating container, the detection device is used to detect cooking parameters of the cooking cavity, and the control device is electrically connected to the heating device, the fan and the detection device; The control method of the pressure cooking appliance comprises: After the heating device is working, obtaining cooking parameters of the cooking cavity, wherein the cooking parameters include a first pressure-related parameter; When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage, and in the anti-overshoot working stage, the fan is controlled to start working.

2. The control method according to claim 1, characterized in that: The first pressure-related parameter comprises pressure or temperature.

3. The control method according to claim 1, characterized in that: When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the step further includes: Get the amount of food in the cooking chamber; According to the amount of food in the cooking cavity, first operating parameters of the fan and the heating device in the anti-overshoot working stage are determined.

4. The control method according to claim 3, characterized in that: The step of obtaining the amount of food in the cooking chamber comprises: Performing a first timing from the start of the heating device to the anti-overshoot working stage; The amount of food in the cooking cavity is obtained according to the value of the first timing.

5. The control method according to claim 1, characterized in that: In the overshoot prevention stage, the fan and the heating device are controlled to operate in a first alternating manner with a first operating parameter.

6. The control method according to claim 5, characterized in that: The first operating parameter of the fan includes the power of the fan and the duration of a single working cycle; The first working parameter of the heating device includes the duration of a single working cycle of the heating device.

7. The control method according to claim 1, characterized in that: When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the step further includes: Get the amount of food in the cooking chamber; The anti-overshoot setting value is determined according to the food amount.

8. The control method according to claim 1, characterized in that: The cooking parameters also include a second pressure-related parameter; When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the step further includes: When the cooking cavity is in the heating stage and when the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage, and in the cold air exhaust working stage, the fan is controlled to start working.

9. The control method according to claim 8, characterized in that: The second pressure-related parameter comprises pressure or temperature.

10. The control method according to claim 8 or 9, characterized in that: When the cooking cavity is in the temperature rising stage and the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan to start working, the method further includes: Get the amount of food in the cooking chamber; According to the amount of food in the cooking cavity, second operating parameters of the fan and the heating device in the cold air exhaust working stage are determined.

11. The control method according to claim 10, characterized in that: In the cold air exhaust working stage, the fan and the heating device are controlled to work in a second alternating manner with second working parameters.

12. The control method according to claim 11 or 12, characterized in that: The second operating parameter of the fan includes the power of the fan and the duration of a single working cycle; The second working parameter of the heating device includes the duration of a single working cycle of the heating device.

13. The control method according to claim 8, characterized in that: When the cooking cavity is in the temperature rising stage and the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan to start working, the method further includes: Get the amount of food in the cooking chamber; The cold air exhaust setting value is determined according to the amount of food in the cooking cavity.

14. The control method according to claim 10 or 13, characterized in that: The cooking parameters include a cooking cavity temperature value; When the second pressure-related parameter reaches the cold air exhaust setting value, the pressure cooking appliance is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, before the step of controlling the fan to start working, the step further includes: The heating device is turned on to work until the temperature of the cooking cavity reaches a first set temperature value, and a second timing is performed; The amount of food in the cooking cavity is obtained according to the value of the second timing.

15. The control method according to any one of claims 8 to 14, characterized in that: The cooking parameters also include a third pressure-related parameter; When the temperature-related parameter reaches the cold air exhaust setting value, the pressure cooking device is controlled to enter the cold air exhaust working stage. In the cold air exhaust working stage, after the step of controlling the fan to start working, and when the cooking cavity is in the pressure increase stage and the first pressure-related parameter reaches the anti-overshoot setting value, the pressure cooking device is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, before the step of controlling the fan to start working, the method further includes: When the third pressure-related parameter reaches the pressure boost setting value, the pressure cooking appliance is controlled to enter the pressure boost stage, and a third timing is performed from the start of the heating device to the pressure boost stage; Obtaining the amount of food in the cooking cavity according to the value of the third timing; The anti-overshoot setting value is determined according to the food amount.

16. The control method according to claim 15, characterized in that: The third pressure-related parameter comprises pressure or temperature.

17. The control method according to claim 1, characterized in that: The cooking parameters also include a fourth pressure-related parameter; When the cooking cavity is in the pressure increasing stage and the first pressure related parameter reaches the anti-overshoot setting value, the pressure cooking appliance is controlled to enter the anti-overshoot working stage. In the anti-overshoot working stage, after the step of controlling the fan to start working, the method further includes: When the fourth pressure-related parameter reaches the pressure-maintaining target value, the pressure cooking appliance is controlled to enter the pressure-maintaining stage. During the pressure-maintaining stage, the heating device and the fan are controlled to operate with the fourth working parameter so that the pressure in the cooking cavity is between the maximum pressure and the minimum pressure.

18. The control method according to claim 17, characterized in that: The fourth pressure-related parameter comprises pressure or temperature.

19. The control method according to claim 17, characterized in that: When the fourth pressure-related parameter reaches the pressure-maintaining target value, the pressure cooking appliance is controlled to enter a pressure-maintaining stage. During the pressure-maintaining stage, the heating device and the fan are controlled to operate at a fourth operating parameter so that the pressure in the cooking cavity is between a maximum pressure value and a minimum pressure value, before the step of: Performing a fourth timing from the start of the heating device to the pressure-maintaining stage; Obtaining the amount of food in the cooking cavity according to the value of the fourth timing; According to the amount of food, fourth operating parameters of the fan and the heating device in the pressure holding stage are determined.

20. A pressure cooking device, characterized in that: The pressure cooking device comprises: A heating container having a cooking cavity; A heating device, disposed on the heating container, for heating the cooking cavity; A fan, disposed on the heating container, for blowing air toward the heating container; a detection device for detecting cooking parameters of the cooking cavity, and A control device is electrically connected to the heating device, the fan, and the detection device, the control device includes a memory, a processor, and a control program for the pressure cooking appliance stored in the memory and executable on the processor, the control program for the pressure cooking appliance being configured to implement the steps of the control method for the pressure cooking appliance as described in any one of claims 1 to 19.

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