Pressure cooking pot and method for automatically pressing floater

Abstract

The invention provides a pressure cooking pot and an automatic floater pressing method. The pressure cooking pot comprises a pot body, a floater, an air escape valve and a flow guide part. The pot comprises a pot body and a pot cover, and a containing cavity is formed between the pot body and the pot cover. The floater is movably arranged on the pot cover and comprises a jacking part and a pressing part which are arranged oppositely, and the jacking part faces the containing cavity; the air escape valve is arranged on the cooker and provided with a valve channel. The flow guide piece is provided with an airflow channel, and the airflow channel at least extends to one end of the pressing part and at least extends to the other end of the air escape valve; the containing cavity and the air flow channel are communicated through the valve channel when the air release valve is opened and are separated when the air release valve is closed. The automatic floater pressing method comprises the steps that the gas release valve is opened to enable gas in the containing cavity to flow into the gas flow channel through the valve channel; the air in the air flow channel is guided to flow along the flow guide piece, and driving air flow flowing to the pressing part is obtained; force is applied to the pressing part by driving airflow to drive the floater to move and approach the containing cavity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a pressure cooking pot and an automatic pressing float method. BACKGROUND

[0002] The lid of the pressure cooking pot movably has a float, and the position state of the float relative to the lid can indicate the gas pressure in the pot. When the gas pressure in the pot is relatively high, the float is lifted by the gas in the pot, and after a part of the gas in the pot is discharged, the gravity of the float will overcome the pressure of the gas on the float to make the float sink. In order to improve the use safety of the product, some existing pressure cooking pots are provided with an anti-lid-opening structure, the float is lifted, the anti-lid-opening structure limits the lid and the pot body, and after the float sinks, the limitation on the lid is released to allow the lid to be opened. On this basis, some pressure cooking pots are also provided with a structure for the user to manually press the float, and the float is pressed to sink to quickly release the limitation on the lid and quickly open the lid. Manually pressing the float not only needs to apply a large pressure to the float, but also has the risk of burning the hand. SUMMARY

[0003] In view of this, the present application provides a pressure cooking pot and an automatic pressing float method which can automatically press the float downward to facilitate quick opening of the lid.

[0004] The pressure cooking pot provided by the present application comprises:

[0005] A pot comprises a pot body and a lid, and a containing cavity is formed between the pot body and the lid;

[0006] A float is movably arranged on the lid, and the float comprises a lifting portion and a pressing portion arranged opposite to each other, and the lifting portion faces the containing cavity;

[0007] A gas discharge valve is arranged on the pot and has a valve channel;

[0008] A flow guide member has a gas flow channel, and the gas flow channel comprises one end extending to the pressing portion and the other end extending to the gas discharge valve;

[0009] The containing cavity and the gas flow channel are connected and communicated through the valve channel when the gas discharge valve is opened, and are blocked when the gas discharge valve is closed.

[0010] Compared with the prior art, the pressure cooking pot of the present application realizes automatic pressing of the float by using the gas discharged from the inside of the pot to press the pressing portion, and the automatic pressing of the float by the gas replaces the manual pressing operation of the user, which not only overcomes the difficulty of manually pressing the float, but also eliminates the risk of burning the hand. Only by opening the gas discharge valve can the float be automatically pressed downward to quickly open the lid, thereby providing the user with a better use experience and safety guarantee.

[0011] In one of the embodiments, the flow guide comprises a pressing pipe segment, the airflow channel comprises a pressing flow passage formed in the pressing pipe segment, and the pressing pipe segment at least sleeves the pressing part in the pressing flow passage.

[0012] In this way, the airflow in the airflow channel can more centrally impact and push the pressing part when flowing through the pressing pipe segment, that is, more airflow participates in the force exertion on the pressing part, which improves the efficient use of the kinetic energy of the airflow in the airflow channel and helps to more quickly and easily complete the automatic pressing of the float.

[0013] In one of the embodiments, the pressing pipe segment is provided with a gas leakage hole that communicates the pressing flow passage with the outside of the pressing pipe segment.

[0014] In this way, the airflow in the airflow channel can be discharged from the flow guide in time after completing the force exertion and pushing of the pressing part, which avoids the continuous rise of the air pressure in the airflow channel and causes accidents.

[0015] In one of the embodiments, the pressing pipe segment comprises a guide segment and a sealing segment, the pipe wall of the guide segment is slidably connected with the float, the gas leakage hole is arranged in the pipe wall of the guide segment, and the end of the sealing segment is sealingly connected with the pot cover, and the pipe wall of the sealing segment is movably and sealingly connected with the float.

[0016] In this way, it is ensured that the gas in the container cavity can only flow into the airflow channel through the valve passage and finally be discharged from the gas leakage hole, which avoids the gas in the container cavity directly flowing into the pressing pipe segment and failing to participate in the force exertion on the pressing part, and also does not affect the normal discharge of the gas from the gas leakage hole, which helps to more quickly and efficiently complete the pressing of the float by the gas.

[0017] In one of the embodiments, the flow guide comprises an air outlet pipe segment, the airflow channel comprises an air outlet flow passage formed in the air outlet pipe segment, the air outlet pipe segment sleeves at least part of the gas leakage valve in the air outlet flow passage, and the container cavity and the air outlet flow passage are connected through the valve passage when the gas leakage valve is opened.

[0018] In this way, the gas in the container cavity can flow into the air outlet flow passage after flowing out of the valve passage, thereby achieving the purpose of concentrating the gas in the container cavity into the flow guide, ensuring that more gas from the container cavity can flow along the flow guide to form a driving airflow to impact the pressing part with greater kinetic energy, which helps to quickly and easily and efficiently complete the automatic pressing of the float.

[0019] In one of the embodiments, the pot cover is provided with a valve body mounting hole, the gas leakage valve is inserted into the valve body mounting hole, and the end of the air outlet pipe segment is sealingly connected to the opening edge of the valve body mounting hole.

[0020] In this way, it is ensured that the gas in the cavity can only flow into the gas outlet pipe section through the valve channel, preventing the gas from leaking directly from the valve body mounting hole without flowing into the flow guide, so that the gas flow in the flow guide can have sufficient kinetic energy to easily and quickly press the float.

[0021] In some embodiments, the float is reciprocally movable within a preset floating range, which includes a top end relatively far away from the cavity and a bottom end relatively close to the cavity. The position of the air release hole is between the position of the top end and the position of the bottom end in the length direction of the preset floating range.

[0022] In this way, it is ensured that the driving gas flow applies force to the pressing part and drives the float to be pressed down by a distance, and then is discharged from the flow guide through the air release hole, avoiding the gas being discharged from the flow guide too early without pushing the float, thereby achieving full utilization of the kinetic energy of the driving gas flow.

[0023] In some embodiments, the air release valve includes an air inlet end extending into the cavity and an air outlet end located in the gas outlet channel, and the valve channel penetrates the air inlet end and the air outlet end.

[0024] In this way, the gas flow enters the valve channel of the air release valve in the cavity and is finally discharged from the air release valve in the gas outlet channel, so that the gas flow has an initial velocity suitable for the gas flow passage after leaving the air release valve, avoiding strong impact on the flow guide during the transfer of the gas flow from the cavity to the gas flow passage, and helping to form a driving gas flow with strong kinetic energy and a determined flow direction more quickly.

[0025] In one of the embodiments, the pressure cooker further includes a driver provided on the pot, the driver being connected to the float and configured to drive the float to move towards the cavity.

[0026] In this way, on the basis of the driving gas flow applying force to the pressing part to drive the float, the driver can provide auxiliary power to ensure that the float is successfully driven to be pressed down. When the kinetic energy of the driving gas flow in the flow guide is insufficient, the driver can play a greater role and replace manual pressing of the float. When there is wear between the float and the pot cover or the float is contaminated and movement is blocked, the power of the driver acting on the float can make the float more easily overcome the movement resistance to smoothly press down the float.

[0027] In one of the embodiments, the driver includes a driving motor and an abutting member, the driving motor being provided on the pot, and the abutting member being provided on the output shaft of the driving motor and being capable of abutting and disengaging the pressing part.

[0028] In this way, the driver is connected to the float and applies force to the float more simply, and the configuration of the float and the driver is also easier and more convenient.

[0029] In one of the embodiments, the float is reciprocally movable within a preset floating range, which is arranged between the abutting member and the cavity, and includes a top end close to the abutting member and a bottom end close to the cavity. When the pressing portion is at the top end, the abutting member exits the preset floating range, and the abutting member can enter the preset floating range to push the float towards the cavity.

[0030] In this way, the driver can easily switch between applying pressure to the float and stopping applying pressure to the float, only by switching the abutting member between the two states of entering and exiting the preset floating range. After the abutting member exits the preset floating range, the float can still be lifted by the gas in the cavity to bring the pressing portion to the top end when the pressure cooker is used next time.

[0031] In one of the embodiments, the flow guide member includes a pressing pipe segment with a side hole, and the airflow channel includes a pressing flow passage formed in the pressing pipe segment and extending at least to the pressing portion. The output shaft passes through the side hole, and the abutting member is located in the pressing flow passage.

[0032] In this way, the two automatic float pressing modes of using gas to impact the pressing portion and using the driver to push the pressing portion can be compatible, and the size of the side hole can be minimized to minimize the airflow loss from the side hole to the outside of the pressing pipe segment, thereby maximizing the kinetic energy of the driving airflow in the flow guide member.

[0033] In one of the embodiments, the pressure cooker further includes a control assembly connected to the air release valve, which is configured to control the opening and closing of the air release valve. The driver is communicatively connected to the control assembly, and the driver can operate to drive the float towards the cavity when the air release valve is open.

[0034] In this way, the driver can drive the float as soon as the gas is transferred from the cavity to the airflow channel, so that the driver-driven float pressing and the airflow-driven float pressing can be performed synchronously or even the driver-driven float pressing can be performed in advance of the airflow-driven float pressing, which helps to press the float faster.

[0035] In one of the embodiments, the pressure cooker further includes a pressure sensing device connected to the driver, which includes a sensing end arranged in the airflow channel and / or the cavity. The pressure sensing device is configured to control the driver to output power to the float and stop outputting power to the float.

[0036] In this way, the sensing result of the pressure sensing device can be used to represent the internal gas pressure of the cavity. The driver can be involved in driving the float to press the float faster when the internal gas pressure of the cavity is at a higher level, and the driver can stop driving the float when the internal gas pressure of the cavity is at a lower level, which helps to reduce the energy consumption of the driver.

[0037] In one of the embodiments, the driver comprises an abutting member arranged in the airflow passage, the abutting member is capable of abutting and disengaging the pressing part, and the sensing end is arranged in the airflow passage and the abutting member.

[0038] In this way, the pressure sensing device can indirectly determine the internal pressure of the container cavity according to the sensing result of the airflow passage, thereby simplifying the configuration of the pressure sensing device.

[0039] The automatic pressing method of the float provided by the application comprises the following steps:

[0040] S10, opening the air release valve to make the gas in the container cavity flow into the airflow passage through the valve channel;

[0041] S20, guiding the gas in the airflow passage to flow along the flow guide member and obtain a driving airflow flowing to the pressing part;

[0042] S30, applying force to the pressing part by the driving airflow to drive the float to move towards the container cavity.

[0043] Compared with the prior art, the application provides a new method for pressing the float, which not only applies pressure to the pressing part by the gas discharged from the inner part of the pressure cooker to automatically press the float, realizes the use of the gas discharged when the pressure cooker is released, and meets the current environmental protection and automation concepts; and replaces the manual pressing operation of the user to fundamentally eliminate the risk of scalding the hands by the lid and the float; in addition, the automatic pressing process of the float is started when the air release valve is opened, so that the automatic pressing of the float can be completed faster to allow the user to open the lid faster.

[0044] In one of the embodiments, the pressure cooker further comprises a driver connected to the float and a pressure sensing device connected to the driver, and the pressure sensing device comprises a sensing end arranged in the airflow passage and / or the container cavity.

[0045] The automatic pressing method of the float further comprises the following steps:

[0046] S41, sensing the pressure of the airflow passage and / or the container cavity by the pressure sensing device, and comparing the sensing result of the pressure sensing device with a preset critical pressure in real time;

[0047] S42, when the sensing result is greater than the preset critical pressure, controlling the driver to drive the float to move towards the container cavity, and when the sensing result is less than the preset critical pressure, controlling the driver to stop driving the float.

[0048] In this way, the sensing result of the pressure sensing device can directly or indirectly represent the internal pressure of the container cavity, the driver drives the float when the internal pressure of the container cavity is high, and stops driving the float when the internal pressure of the container cavity is low, thereby realizing selective driving of the driver to drive the float according to the demand, and helping to reduce the energy consumption of the driver and the entire pressure cooker.

[0049] In one of the embodiments, the driver comprises a driving motor and an abutting member, the abutting member is arranged on the output shaft of the driving motor, the float is reciprocally arranged in a preset floating interval, the preset floating interval is arranged between the abutting member and the cavity, and the preset floating interval comprises a top end close to the abutting member and a bottom end close to the cavity.

[0050] When the sensing result is greater than the preset critical pressure, the driver is controlled to drive the float to move towards the cavity, and when the sensing result is less than the preset critical pressure, the driver is controlled to stop driving the float, which comprises:

[0051] S421. When the sensing result is greater than the preset critical pressure, the driving motor is controlled to drive the abutting member to enter the preset floating interval and push the pressing part to push the jacking part towards the bottom end.

[0052] S422. When the sensing result is less than the preset critical pressure, the driving motor is controlled to drive the abutting member to exit the preset floating interval to allow the float to move away from the cavity and bring the pressing part to the top end.

[0053] In this way, the driver is switched between the state of applying pressure to the float and the state of stopping applying pressure to the float more easily and quickly, only by switching the abutting member between the state of entering the preset floating interval and the state of exiting the preset floating interval. When the abutting member exits the preset floating interval, the float is allowed to be jacked up by the air pressure in the cavity next time the pressure cooker is used so as to bring the pressing part to the top end.

[0054] In one of the embodiments, the pressure cooker further comprises a driver, the driver comprises a driving motor and an abutting member, the abutting member is arranged on the output shaft of the driving motor, and is used to abut and push the pressing part.

[0055] The automatic pressing method of the float further comprises:

[0056] S51. The driving motor is controlled to drive the abutting member to push the pressing part so that the float moves towards the cavity.

[0057] S52. The locked-rotor current of the driving motor is monitored, and the locked-rotor current is compared with a preset critical current in real time.

[0058] S53. When the locked-rotor current is greater than the preset critical current, the driving motor is controlled to drive the abutting member to push the pressing part, and when the locked-rotor current is less than the preset critical current, the driving motor is controlled to drive the abutting member to disengage the pressing part.

[0059] In this way, the size of the locked-rotor current is related to the height position of the float, so that the pressing process of the float can be determined by observing the size of the locked-rotor current, when the locked-rotor current is large, it means that the float still needs to be pressed down, and when the locked-rotor current is small, it means that the float is close to the height position when the pressing is completed, so that the driver is selectively assisted to drive the float to press down according to the position state of the float, which helps to reduce the energy consumption of the driver and the whole pressure cooking pot.

[0060] In one of the embodiments, the float is reciprocally movable within a preset floating range, which is arranged between the abutting member and the container cavity, and includes a top end close to the abutting member and a bottom end close to the container cavity.

[0061] When the locked-rotor current is greater than a preset critical current, the driving motor is controlled to drive the abutting member to push the pressing part, and when the locked-rotor current is less than the preset critical current, the driving motor is controlled to drive the abutting member to disengage from the pressing part.

[0062] S531, when the locked-rotor current is greater than a preset critical current, the driving motor is controlled to drive the abutting member to enter the preset floating range and at least occupy the top end.

[0063] S532, when the locked-rotor current is less than the preset critical current, the driving motor is controlled to drive the abutting member to withdraw from the preset floating range to allow the float to move away from the container cavity and bring the pressing part to the top end.

[0064] In this way, the driver is easier and faster to switch between the state of applying pressure to the float and the state of stopping applying pressure to the float, only by switching the abutting member between the state of entering the preset floating range and the state of withdrawing from the preset floating range, when the abutting member withdraws from the preset floating range, the float is allowed to be lifted up by the gas pressure in the container cavity next time the pressure cooking pot is used so as to bring the pressing part to the top end.

[0065] In one of the embodiments, the pressure cooking pot further comprises a control assembly connected to the air release valve, the control assembly is used to control the opening and closing of the air release valve, the driver is in communication connection with the control assembly, and the automatic pressing float method further comprises:

[0066] S60, at the moment when the air release valve switches to the open state, the driver is controlled to start running by the control assembly to drive the float to move towards the container cavity.

[0067] In this way, the driver can drive the float at the moment when the gas is transferred from the container cavity to the airflow channel, so that the driver drives the float to press down synchronously or even ahead of the airflow driving the float to press down, which helps to complete the pressing of the float faster. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 A sectional view of the pressure cooking pot according to an embodiment of the present application;

[0069] Figure 2 First partial cross-sectional view of a pressure cooker according to an embodiment of the present application;

[0070] Figure 3 Second partial cross-sectional view of a pressure cooker according to an embodiment of the present application;

[0071] Figure 4 Exploded view of a pressure cooker according to an embodiment of the present application;

[0072] Figure 5 Partial structural view of a pressure cooker according to an embodiment of the present application. Figure 4

[0073] Reference signs: 10, cooker; 11, cooker body; 12, cooker cover; 121, valve body mounting hole; 122, floating through hole; 13, cavity; 20, pressure relief valve; 21, valve passage; 22, air inlet end; 23, air outlet end; 30, float; 31, lifting portion; 32, pressing portion; 40, flow guide; 401, air flow passage; 41, air outlet pipe section; 411, air outlet flow channel; 42, flow guide pipe section; 43, pressing pipe section; 4301, guide section; 4302, sealing section; 431, pressing flow channel; 432, pressure relief hole; 433, side perforation; 50, driver; 51, driving motor; 52, output shaft; 53, abutting member; 60, control assembly. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include one or more of the items referenced, unless the context clearly indicates otherwise. All combinations of the items described herein can be used in any of the embodiments of the application.

[0076] The present application provides a pressure cooker and an automatic pressing float method based on the pressure cooker. When a user wants to open the cooker cover 12 as soon as possible to enjoy food, the automatic pressing float 30 of the present application can be used to make the pressure cooker automatically complete the pressing of the float 30, so as to quickly open the cooker cover 12.

[0077] First, the pressure cooker of the present application is introduced, which is shown in​Figure 1 The pressure cooking pot comprises a pot 10, a float 30, a gas release valve 20 and a flow guide 40, the pot 10 comprises a pot body 11 and a pot cover 12, a cavity 13 for containing food is formed between the pot body 11 and the pot cover 12, the float 30 is movably arranged on the pot cover 12, the float 30 comprises a lifting part 31 and a pressing part 32 arranged oppositely, the lifting part 31 faces the cavity 13 and can be used to receive the pressure of the gas in the cavity 13, the gas release valve 20 is arranged on the pot 10 and has a valve channel 21, the valve channel 21 is open when the gas release valve 20 is opened and is blocked when the gas release valve 20 is closed, the flow guide 40 has a gas flow channel 401, the gas flow channel 401 comprises one end extending to the pressing part 32 and the other end extending to the gas release valve 20, the cavity 13 and the gas flow channel 401 are communicated through the valve channel 21 when the gas release valve 20 is opened and are blocked when the gas release valve 20 is closed.

[0078] Based on the composition and structure of the pressure cooking pot, the automatic pressing float method of the present application comprises:

[0079] S10, opening the gas release valve 20 to make the gas in the cavity 13 flow into the gas flow channel 401 through the valve channel 21;

[0080] S20, guiding the gas in the gas flow channel 401 to flow along the flow guide 40 and obtaining a driving gas flow flowing to the pressing part 32;

[0081] S30, applying force to the pressing part 32 by the driving gas flow to drive the float 30 to move close to the cavity 13.

[0082] The pressure cooking pot of the present application uses the gas in the cavity 13 to impact the pressing part 32 to press the float 30. When the gas release valve 20 is opened, the gas in the cavity 13 flows into the gas flow channel 401 of the flow guide 40 through the valve channel 21, under the guiding action of the flow guide 40 and the action of the cavity 13 continuously discharging gas into the gas flow channel 401, these gases entering the gas flow channel 401 form a driving gas flow with a certain kinetic energy and flow to the pressing part 32, the driving gas flow applies pressure to the pressing part 32 to drive the float 30 to move towards the cavity 13, the process of the float 30 moving towards the cavity 13 is the process of the float 30 being pressed, thus the user does not need to manually press the float 30, the risk of the user's hand being scalded by the float 30 or the pot cover 12 is eliminated, and the automatic pressing of the float 30 of the pressure cooking pot is realized, which brings a better use experience to the user.

[0083] The application also provides a new floating ball 30 pressing method, which uses the gas discharged from the inner part of the pot 10 to apply force to the pressing part 32 to automatically press the floating ball 30, realizes the use of the gas discharged when the pressure cooking pot is discharged, conforms to the current environmental protection and automation concept, and fundamentally eliminates the risk of the user being scalded by the hand. The automatic pressing process of the floating ball 30 is started when the air release valve 20 is opened, so that the automatic pressing of the floating ball 30 can be completed faster, thereby allowing the user to open the pot cover 12 faster.

[0084] Referring to Figures 2-4 In some embodiments, the pot cover 12 is provided with a valve body mounting hole 121 communicating with the container cavity 13, and the air release valve 20 is inserted into the valve body mounting hole 121. The air release valve 20 includes an air inlet end 22 extending into the container cavity 13, and an air outlet end 23 protruding outwardly from the pot cover 12, and the valve channel 21 penetrates the air inlet end 22 and the air outlet end 23.

[0085] Optionally, the air release valve 20 includes a valve core and a valve body coaxially arranged, the valve body is inserted into the valve body mounting hole 121, and the valve core is movably arranged axially relative to the valve body. The air inlet end 22 and the air outlet end 23 are formed in the valve core and the valve body, respectively, and the valve core and the valve body are moved axially relative to each other to open or close the air release valve 20.

[0086] Further referring to Figures 2-3 , Figures 4-5 The pressure cooking pot further includes a control assembly 60 for controlling the opening and closing of the air release valve 20. Optionally, the control assembly 60 is a solenoid valve, and the control assembly 60 can drive the valve core to move axially relative to the valve body to control the opening and closing of the air release valve 20.

[0087] Further referring to Figures 2-3 , Figures 4-5 The flow guide 40 includes an air outlet pipe section 41, the airflow passage 401 includes an air outlet flow channel 411 formed in the air outlet pipe section 41, and the air outlet pipe section 41 is sleeved at least partially in the air outlet flow channel 411 of the air release valve 20. Optionally, the air outlet pipe section 41 is connected to the pot cover 12 and the air outlet end 23 is sleeved in the air outlet flow channel 411, and the valve channel 21 communicates the container cavity 13 with the air outlet flow channel 411 when the air release valve 20 is opened.

[0088] In this way, the gas in the container cavity 13 can be concentrated and introduced into the flow guide 40 after flowing out of the valve channel 21, ensuring that more gas from the container cavity 13 flows along the airflow passage 401 to form a driving airflow, which helps to increase the kinetic energy of the driving airflow and more easily and effectively apply force to the pressing part 32.

[0089] As preferred, the end of the air outlet pipe section 41 is sealingly connected with the opening edge of the valve body mounting hole 121. In this way, the gas in the cavity 13 can flow into the valve channel 21 and then to the air outlet flow channel 411, and the valve channel 21 is the only channel for the gas in the cavity 13 to flow out, which can avoid the gas from leaking out of the valve body mounting hole 121, and ensure that the driving gas flow has enough kinetic energy to easily and efficiently press the float 30.

[0090] Figures 2-3 In the illustrated embodiment, the air outlet pipe section 41 is coaxially sleeved on the outer periphery of the air release valve 20, the air outlet end 23 is sleeved in the air outlet flow channel 411 by the air outlet pipe section 41, the valve channel 21 extends along the axial direction of the air release valve 20, and the extension direction of the valve channel 21 is the same as or substantially the same as the extension direction of the air outlet pipe section 41. When the gas flowing along the valve channel 21 flows out of the air release valve 20, the gas will have the same flow velocity direction as the extension direction of the air outlet pipe section 41, so as to alleviate the impact of the gas on the air outlet pipe section 41 and reduce the kinetic energy loss of the gas.

[0091] Referring to Figures 2-3 In some embodiments, the pot cover 12 is arranged opposite to the bottom wall of the pot body 11, the pot cover 12 is provided with a floating through hole 122 communicating with the cavity 13, and the float 30 is reciprocatingly arranged in the floating through hole 122. When the pressing part 32 is pressed, the float 30 moves in the floating through hole 122 and approaches the cavity 13, the float 30 is pressed to sink, and the jacking part 31 approaches the bottom wall of the pot body 11; when the jacking part 31 is pressed by the air in the cavity 13, the float 30 moves in the floating through hole 122 and away from the cavity 13, so that the float 30 floats up, and the jacking part 31 is away from the bottom wall of the pot body 11.

[0092] Optionally, the float 30 and the hole wall of the floating through hole 122 are in sliding fit, and the two are coaxially matched, so that the float 30 is reciprocatingly arranged in the floating through hole 122 in the axial direction. In this way, the jacking part 31 is always directed to the cavity 13 and the bottom wall of the pot body 11, and the pressing part 32 is always away from the cavity 13 and the bottom wall of the pot body 11, so that the float 30 can more quickly respond to the pressure acting on the jacking part 31 or the pressing part 32 to move in the axial direction.

[0093] Further, referring to Figures 2-3 , Figures 4-5, the flow guide 40 comprises a pressing pipe segment 43, and the airflow passage 401 comprises a pressing flow channel 431 formed in the pressing pipe segment 43. Optionally, when the float 30 floats to the position farthest from the bottom wall of the kettle body 11, the pressing pipe segment 43 at least sleeves the pressing portion 32 in the pressing flow channel 431, and when the float 30 sinks to the position closest to the bottom wall of the kettle body 11, the pressing pipe segment 43 also at least sleeves the pressing portion 32 in the pressing flow channel 431. It can be understood that in other embodiments, when the float 30 sinks to the position closest to the bottom of the kettle body 11, the pressing pipe segment 43 can also not sleeve the pressing portion 32 at this time.

[0094] Optionally, the pressing pipe segment 43 is a straight pipe segment, the length direction of the pressing pipe segment 43 is the same as the axial direction of the floating through hole 122, the float 30 is a columnar element, the jacking portion 31 and the pressing portion 32 are respectively formed at the two axial ends of the float 30, wherein the jacking portion 31 is the end of the float 30 relatively close to the bottom wall of the kettle body 11, and the pressing portion 32 is the other end of the float 30 relatively far from the bottom wall of the kettle body 11. The periphery of the float 30 is in sliding connection with the pipe wall of the pressing pipe segment 43, and the periphery of the pressing portion 32 is still adapted to the pipe wall of the pressing pipe segment 43 even when the float 30 sinks to the position closest to the bottom of the kettle body 11.

[0095] In this way, no matter whether the pressing portion 32 is stressed or the jacking portion 31 is stressed, the posture of the float 30 is always stable, the jacking portion 31 is always directed towards the containing cavity 13, and it is ensured that the float 30 can be rapidly floated by the gas pressure in the containing cavity 13, and it is ensured that the float 30 can be rapidly sunk when the external force acts on the pressing portion 32.

[0096] In Figures 2-3 the embodiment shown, the float 30 can reciprocate relative to the kettle cover 12 in the preset floating interval along the axial direction of the floating through hole 122 and the length direction of the pressing pipe segment 43, the preset floating interval is a linear translation interval extending along the axis of the floating through hole 122, the total length of the preset floating interval is greater than the axial length of the float 30, and the two limit positions of the preset floating interval are respectively a top end and a bottom end, the top end is located at one end of the preset floating interval away from the containing cavity 13, and the bottom end is located at the other end of the preset floating interval.

[0097] Specifically, when the gas in the containing cavity 13 presses the jacking portion 31 to jack up the float 30 to float relative to the kettle cover 12, the state of the float 30 is as shown in Figure 2 , at this time, the pressing portion 32 is at the top end, and the jacking portion 31 is higher than the bottom end; when the external force acts on the pressing portion 32 to press the float 30 to sink relative to the kettle cover 12, the state of the float 30 is as shown in Figure 3 , at this time, the pressing portion 32 is lower than the top end, and the jacking portion 31 is at the bottom end.

[0098] Further, referring toFigures 2-3 、 Figures 4-5 The press pipe section 43 is provided with a gas leakage hole 432 which communicates the press flow channel 431 with the outside of the press pipe section 43. In this way, the gas flow in the gas flow channel 401 can be discharged from the flow guide 40 in time after the press part 32 is pushed, avoiding the continuous increase of the internal pressure of the flow guide 40 which may cause the damage of the flow guide 40, and improving the safety of the pressure cooking pot.

[0099] Specifically, referring to Figures 2-3 The press pipe section 43 comprises a guide section 4301 and a sealing section 4302 which are coaxially connected. The guide section 4301 is coaxial with the through hole of the float 30, and the press flow channel 431 is formed in the guide section 4301 and the sealing section 4302. The pipe wall of the guide section 4301 is slidably connected with the circumferential side of the float 30, and the gas leakage hole 432 is arranged in the guide section 4301. The sealing section 4302 is sealingly connected with the opening edge of the float through hole 122, and the circumferential side of the float 30 is movably sealingly connected with the pipe wall of the sealing section 4302. The hole wall of the float through hole and the guide section 4301 jointly guide the float 30 to perform linear reciprocating motion between the top end and the bottom end along the preset float interval.

[0100] In this way, the gas in the cavity 13 cannot leak out of the float through hole 122, nor can it leak out between the float 30 and the pipe wall of the sealing section 4302. When the gas leakage valve 20 is opened, the valve channel 21 is the only passage for the gas in the cavity 13 to flow out, meaning that the gas in the cavity 13 can and only can flow into the gas flow channel 401 through the valve channel 21 to form the driving gas flow under the guidance of the flow guide 40, which can maximize the kinetic energy of the driving gas flow and make the driving gas flow sufficient to press the float 30.

[0101] Further, referring to Figures 2-3 The position of the gas leakage hole 432 is at least not higher than the position of the top end along the length direction of the float through hole 122 and the press pipe section 43, i.e. the length direction of the preset float interval, which means that the distance from the gas leakage hole 432 to the bottom wall of the pot body 11 is at least not greater than the maximum distance from the press part 32 to the bottom wall of the pot body 11. Alternatively, the position of the gas leakage hole 432 is between the top end and the bottom end. In this way, the driving gas flow can be ensured to press the press part 32 and press the float 30 downward for a distance, and then be discharged from the flow guide 40 through the gas leakage hole 432, avoiding the premature discharge of part of the gas from the flow guide 40 without pushing the float 30, and further making full use of the kinetic energy of the driving gas flow.

[0102] Further, referring to Figures 2-3 、 Figures 4-5The flow guide 40 further comprises a flow guide pipe segment 42, the air outlet pipe segment 41 and the pressing pipe segment 43 are connected to two ends of the flow guide pipe segment 42 respectively, the air outlet pipe segment 41 and the pressing pipe segment 43 are connected to the flow guide pipe segment 42 in a curve transition manner to reduce kinetic energy loss of the driving airflow in the airflow channel 401, and the flow guide pipe segment 42 is used for guiding the gas in the airflow channel 401 to form the driving airflow.

[0103] In some embodiments, the pressure cooker further comprises a driver 50 arranged on the pot 10, the driver 50 is connected to the float 30, and the driver 50 is capable of outputting power to the float 30 additionally to drive the float 30 to move towards the cavity 13 on the basis of the driving airflow pushing the pressing part 32 to drive the float 30 to press down, so as to ensure that the float 30 is pressed down successfully finally.

[0104] Referring to Figures 2-3 , Figures 4-5 In some embodiments, the driver 50 comprises a driving motor 51 and an abutting member 53, the driving motor 51 is arranged on the pot cover 12 or the pot body 11, the abutting member 53 is arranged on an output shaft 52 of the driving motor 51, and the abutting member 53 is capable of abutting and separating from the pressing part 32 under the driving of the driving motor 51. When the driver 50 needs to provide power additionally to assist in driving the float 30 to press down, the driving motor 51 drives the abutting member 53 to the position abutting against the pressing part 32 through the output shaft 52, and then the abutting member 53 applies pressure to the pressing part 32 under the driving of the driving motor 51; when the float 30 is pressed down to the position, the driving motor 51 drives the abutting member 53 away from the pressing part 32 through the output shaft 52, so that the float 30 can float up under the pressure of the gas in the cavity 13 when the pressure cooker is used next time.

[0105] Specifically, a preset floating interval of the reciprocating movement of the float 30 relative to the pot cover 12 is arranged between the abutting member 53 and the cavity 13. As shown in Figure 2 , the pressing part 32 is at the top end at this time, and the abutting member 53 exits the preset floating interval; as shown in Figure 3 , the pressing part 32 enters the preset floating interval and occupies at least the top end at this time, so that the pressing part 32 moves away from the top end and moves towards the cavity 13 under the pushing of the abutting member 53. In the embodiment shown in Figures 2-5 , the abutting member 53 rotates with the output shaft 52 to enter or exit the preset floating interval, the abutting member 53 is a plate-shaped member fixed on the output shaft 52, and the abutting member 53 applies a pushing force to the pressing part 32 through the edge of the abutting member 53. In other embodiments, the abutting member 53 can also be arranged to move with the output shaft 52 to enter or exit the preset floating interval.

[0106] Optionally, referring to Figures 2-3 , Figures 4-5The preset floating interval is formed in the pressing pipe segment 43, that is, the length direction of the pressing pipe segment 43 defines the extension direction of the preset floating interval. The pressing pipe segment 43 is provided with a side hole 433 communicating with the pressing flow channel 431. The driving motor 51 is installed on the pot cover 12, and the output shaft 52 extends along one of the radial directions of the pressing pipe segment 43 and passes through the side hole 433. Regardless of whether the abutting piece 53 enters the preset floating interval or exits the preset floating interval under the driving of the output shaft 52, the abutting piece 53 is always located in the pressing flow channel 431.

[0107] In this way, the float 30 can be arranged in the pressing pipe segment 43, so that the kinetic energy of the driving gas flow can be used to press the pressing part 32 more effectively and quickly.

[0108] Further, the pressure cooker further comprises a pressure sensing device connected to the driver 50. The pressure sensing device comprises a sensing end arranged in the gas flow channel 401 and / or the container cavity 13, and is used to sense the gas pressure in the gas flow channel 401 and / or the container cavity 13. The pressure of the gas in the gas flow channel 401 and / or the container cavity 13 can cause the sensing end to change in stress or strain. The stress change and the strain change are both positively correlated with the gas pressure. Therefore, the stress change or the strain change of the sensing end can represent the gas pressure in the gas flow channel 401 and / or the container cavity 13. The pressure sensing device is used to control the driver 50 to output power to the float 30 to press the float 30, and to control the driver 50 to stop outputting power to the float 30. When the gas pressure in the gas flow channel 401 and / or the container cavity 13 is relatively large, it means that the float 30 can be driven to press down by the driver 50. Therefore, the pressure sensing device controls the driver 50 to operate to apply force to the float 30. When the gas pressure in the gas flow channel 401 and / or the container cavity 13 is relatively small, it means that the float 30 is about to be pressed down or has been pressed down. Therefore, the pressure sensing device controls the driver 50 to stop driving the float 30, and the abutting piece 53 is driven to move away from the pressing part 32.

[0109] Based on this, the automatic pressing float method of the present application further comprises:

[0110] S41, sensing the gas pressure in the gas flow channel 401 and / or the container cavity 13 by the pressure sensing device, and comparing the sensing result of the pressure sensing device with a preset critical pressure in real time.

[0111] S42, when the sensing result is greater than the preset critical pressure, controlling the driver 50 to drive the float 30 to interact with the container cavity 13, and when the sensing result is less than the preset critical pressure, controlling the driver 50 to stop driving the float 30.

[0112] The preset critical pressure is a pressure value set artificially according to product research and development and test experience. When the sensing result is greater than the preset critical pressure, the stress change and strain change amplitude of the sensing end are large, the air pressure in the cavity 13 and the air flow channel 401 is at a high level, and the pressure of the gas in the cavity 13 acting on the lifting part 31 makes the float 30 still in the floating state, and some gas in the cavity 13 needs to be released before the pot cover 12 can be opened; when the sensing result is less than the preset critical pressure, the stress change and strain change amplitude of the sensing end decrease, at this time, the air pressure in the cavity 13 and the air flow channel 401 decreases, and the gravity of the float 30 will overcome the pressure of the gas acting on the lifting part 31 to sink relative to the pot cover 12, at this time, it is safe to open the pot cover 12.

[0113] Optionally, the sensing end can be a force strain gauge fixed to the abutting piece 53. The size of the force strain gauge is much smaller than that of the abutting piece 53, and the force of the pressing part 32 acting on the abutting piece 53 will not cause the force strain gauge to generate stress and strain, and the force strain gauge is only used to generate stress and strain when bearing the gas pressure.

[0114] Further, referring to Figure 2 and Figure 3 , the step S42 of controlling the driver 50 to drive the float 30 to interact with the cavity 13 when the sensing result is greater than the preset critical pressure, and controlling the driver 50 to stop driving the float 30 when the sensing result is less than the preset critical pressure, further comprises:

[0115] S421, when the sensing result is greater than the preset critical pressure, controlling the driving motor 51 to drive the abutting piece 53 to enter the preset floating interval and push the pressing part 32 to push the lifting part 31 to the bottom end;

[0116] S422, when the sensing result is less than the preset critical pressure, controlling the driving motor 51 to drive the abutting piece 53 to withdraw from the preset floating interval to allow the float 30 to move away from the cavity 13 and bring the pressing part 32 to the top end.

[0117] The step S422 can be summarized as a reset step of the driver 50, and it needs to be explained that the reset of the driver 50 does not mean that the float 30 immediately floats relative to the pot cover 12, but that the abutting piece 53 will no longer occupy the top end. In fact, after the abutting piece 53 withdraws from the preset floating interval, the float 30 will still make the lifting part 31 remain at the bottom end under the action of gravity, and only in the next use of the pressure cooking pot, the gas in the cavity 13 will apply an upward thrust to the lifting part 31 to lift the float 30 again.

[0118] In some other embodiments, the pressure sensing device can be cancelled, and the control assembly 60 is communicatively connected with the driver 50, for example, when the control assembly 60 is a solenoid valve, the solenoid valve is communicatively connected with the driving motor 51, so that the driver 50 can learn the state of the solenoid valve. When the air release valve 20 is opened under the control of the control assembly 60, the driver 50 can operate and drive the float 30 to move towards the cavity 13. In this way, the process of driving the float 30 to move down by the driver 50 starts at the moment when the air release valve 20 is opened, the driving of the float 30 to move down by the driver 50 and the driving of the float 30 to move down by the air flow are synchronized, or even the process of driving the float 30 to move down by the driver 50 is ahead of schedule.

[0119] Further, the automatic pressing method of the float of the present application further comprises:

[0120] S60, at the moment when the air release valve 20 is switched to the open state, the driver 50 is controlled by the control assembly 60 to start operation to drive the float 30 to move towards the cavity 13;

[0121] S51, the driving motor 51 is controlled to drive the abutting piece 53 to push the pressing part 32 to make the float 30 move towards the cavity 13;

[0122] S52, the locked-rotor current of the driving motor 51 is monitored, and the locked-rotor current is compared with the preset critical current in real time;

[0123] S53, when the locked-rotor current is greater than the preset critical current, the driving motor 51 is controlled to drive the abutting piece 53 to push the pressing part 32, and when the locked-rotor current is less than the preset critical current, the driving motor 51 is controlled to drive the abutting piece 53 to disengage from the pressing part 32.

[0124] Step S60 indicates that the valve channel 21 is connected with the cavity 13 and the air flow passage 401, and the two processes of driving the float 30 to move down by the driver 50 are started at the same time, so that the driving of the float 30 to move down by the driver 50 and the driving of the float 30 to move down by the air flow are synchronized, or even the process of driving the float 30 to move down by the driver 50 is ahead of schedule, which can speed up the float 30 to move down and thus facilitate the user to open the pot cover 12 faster.

[0125] When the abutting piece 53 is abutted to the pressing part 32 under the drive of the driving motor 51, the pressing part 32 will apply a counter force to the abutting piece 53, which is opposite to the direction of the power generated by the driving motor 51, thus a locked-rotor current is generated inside the driving motor 51. As the float 30 moves gradually from the top end to the bottom end in the preset floating interval, the pressure of the float 30 against the pressing part 32 tends to decrease, and the locked-rotor current inside the driving motor 51 tends to decrease. Therefore, the size of the locked-rotor current is positively correlated with the position of the float 30 in the preset floating interval, that is, the closer the float 30 is to the cavity 13 and the bottom wall of the pot body 11, the smaller the locked-rotor current is, and the lower the air pressure in the cavity 13 and the airflow passage 401 is. Thus, the locked-rotor current can be used to indirectly represent the air pressure in the cavity 13 and the airflow passage 401.

[0126] The preset critical current is an electric current value artificially set according to product research and development and test experience. When the locked-rotor current is greater than the preset critical current, the pressure of the float 30 against the abutting piece 53 is greater, the float 30 is still in the state of floating relative to the pot cover 12, and the air pressure in the cavity 13 and the airflow passage 401 is still at a relatively high level, and the pot cover 12 can be safely opened only after some air in the cavity 13 is released. When the locked-rotor current is less than the preset critical value, the pressure of the float 30 against the abutting piece 53 is small or even negligible, and at this time, the float 30 is in the position of sinking relative to the pot cover 12, the air pressure in the cavity 13 and the airflow passage 401 decreases to a level close to or the same as that outside the pot 10, and at this time, it is safe to open the pot cover 12. Thus, the driving device 50 does not need to apply force to the pressing part 32.

[0127] Further, the step S53 of controlling the driving motor 51 to drive the abutting piece 53 to push the pressing part 32 when the locked-rotor current is greater than the preset critical current, and to drive the abutting piece 53 to disengage from the pressing part 32 when the locked-rotor current is less than the preset critical current comprises:

[0128] S531, when the locked-rotor current is greater than the preset critical current, controlling the driving motor 51 to drive the abutting piece 53 to enter the preset floating interval and at least occupy the top end;

[0129] S532, when the locked-rotor current is less than the preset critical current, controlling the driving motor 51 to drive the abutting piece 53 to withdraw from the preset floating interval to allow the float 30 to move away from the cavity 13 and bring the pressing part 32 to the top end.

[0130] The step S532 can be summarized as a reset step of the driver 50. It is to be noted that the reset of the driver 50 does not mean that the float 30 is immediately floated relative to the lid 12, but means that the abutting member 53 will no longer occupy the top end. In fact, after the abutting member 53 is withdrawn from the preset floating interval, the float 30 will still keep the lifting portion 31 in the state of being at the bottom end under the action of gravity. Only in the next process of using the pressure cooker, the upward thrust of the gas in the cavity 13 to the lifting portion 31 can again lift the float 30 to float.

[0131] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure as long as there is no contradiction.

[0132] Those skilled in the art should understand that the above embodiments are only used to illustrate the present application, but not as a limitation to the present application. Any modification and change made to the above embodiments within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A pressure cooking pot, characterized in that, include: The cookware (10) includes a pot body (11) and a pot lid (12), wherein a cavity (13) is formed between the pot body (11) and the pot lid (12); A float (30) is movably disposed on the pot lid (12). The float (30) includes a lifting part (31) and a pressing part (32) disposed opposite to each other. The lifting part (31) faces the cavity (13). A vent valve (20) is provided on the cookware (10) and has a valve passage (21); The guide (40) has an airflow channel (401) including at least one end extending to the pressing part (32) and at least the other end extending to the vent valve (20); The cavity (13) and the airflow channel (401) are connected through the valve channel (21) when the vent valve (20) is open, and are blocked when the vent valve (20) is closed.

2. The pressure cooker according to claim 1, characterized in that, The flow guide (40) includes a pressing tube section (43), and the airflow channel (401) includes a pressing flow channel (431) formed in the pressing tube section (43). The pressing tube section (43) at least sleeves the pressing part (32) within the pressing flow channel (431).

3. The pressure cooker according to claim 2, characterized in that, The pressing tube section (43) has a vent (432) that connects the pressing flow channel (431) with the outside of the pressing tube section (43).

4. The pressure cooker according to claim 3, characterized in that, The pressing tube section (43) includes a guide section (4301) and a sealing section (4302). The tube wall of the guide section (4301) is slidably connected to the float (30). The vent hole (432) is opened on the tube wall of the guide section (4301). The end of the sealing section (4302) is sealed to the pot lid (12). The tube wall of the sealing section (4302) is movably sealed to the float (30).

5. The pressure cooker according to claim 4, characterized in that, The float (30) is reciprocally positioned within a preset floating range, which includes a top end relatively far from the cavity (13) and a bottom end relatively close to the cavity (13). In the length direction of the preset floating range, the vent (432) is located between the top end and the bottom end.

6. The pressure cooker according to claim 1, characterized in that, The flow guide (40) includes an outlet pipe section (41), and the airflow channel (401) includes an outlet airflow passage (411) formed in the outlet pipe section (41). The outlet pipe section (41) sleeves at least part of the vent valve (20) in the outlet airflow passage (411). The cavity (13) and the outlet airflow passage (411) are connected through the valve passage (21) when the vent valve (20) is opened.

7. The pressure cooker according to claim 6, characterized in that, The pot lid (12) has a valve body mounting hole (121), the vent valve (20) is inserted into the valve body mounting hole (121), and the end of the vent pipe section (41) is sealed to the opening edge of the valve body mounting hole (121); and / or, The vent valve (20) includes an inlet end (22) extending into the cavity (13) and an outlet end (23) located in the outlet air passage (411), and the valve passage (21) connects the inlet end (22) and the outlet end (23).

8. The pressure cooker according to any one of claims 1 to 7, characterized in that, The pressure cooker also includes a driver (50) disposed on the cookware (10), the driver (50) being connected to the float (30), the driver (50) being used to drive the float (30) to move toward the cavity (13).

9. The pressure cooking pot according to claim 8, characterized in that, The driver (50) includes a drive motor (51) and an abutment (53). The drive motor (51) is located on the pot (10), and the abutment (53) is located on the output shaft (52) of the drive motor (51). The abutment (53) can abut against and disengage from the pressing part (32).

10. The pressure cooker according to claim 9, characterized in that, The float (30) is reciprocally positioned within a preset floating range, which is located between the abutment (53) and the cavity (13), including a top end relatively close to the abutment (53) and a bottom end relatively close to the cavity (13). When the pressing part (32) is at the top end, the abutment (53) exits the preset floating range, and the abutment (53) can enter the preset floating range to push the float (30) toward the cavity (13).

11. The pressure cooker according to claim 9, characterized in that, The flow guide (40) includes a pressing tube section (43) with a side through hole (433), the airflow channel (401) includes a pressing flow channel (431) formed in the pressing tube section (43), the pressing flow channel (431) extends at least to the pressing part (32), the output shaft (52) passes through the side through hole (433), and the abutment (53) is located in the pressing flow channel (431).

12. The pressure cooker according to claim 8, characterized in that, The pressure cooker also includes a control component (60) connected to the vent valve (20), the control component (60) being used to control the opening and closing of the vent valve (20), and the driver (50) being communicatively connected to the control component (60), the driver (50) being able to operate while the vent valve (20) is open to drive the float (30) to move toward the cavity (13).

13. The pressure cooker according to claim 8, characterized in that, The pressure cooker also includes a pressure-sensitive device connected to the driver (50). The pressure-sensitive device includes a sensing end disposed in the airflow channel (401) and / or the cavity (13). The pressure-sensitive device is used to control the driver (50) to output power to the float (30) and to stop outputting power to the float (30).

14. The pressure cooker according to claim 13, characterized in that, The driver (50) includes an abutment (53) disposed in the airflow channel (401), the abutment (53) being able to abut against and disengage from the pressing part (32), and the sensing end being disposed in the airflow channel (401) and in the abutment (53).

15. An automatic method for pressing a float, said method being based on a pressure cooking pot according to any one of claims 1 to 14, characterized in that, The method includes: Open the vent valve (20) to allow the gas in the cavity (13) to flow into the airflow channel (401) through the valve passage (21); The gas in the airflow channel (401) flows along the guide member (40) and is driven by the airflow towards the pressing part (32); By driving the airflow to apply force to the pressing part (32), the float (30) is moved closer to the cavity (13).

16. The automatic float pressing method according to claim 15, characterized in that, The pressure cooker also includes a driver (50) connected to the float (30) and a pressure-sensitive device connected to the driver (50), the pressure-sensitive device including a sensing end disposed in the airflow channel (401) and / or the cavity (13); The method further includes: The pressure of the airflow channel (401) and / or cavity (13) is sensed by a pressure-sensitive device, and the sensing result of the pressure-sensitive device is compared with the preset critical pressure in real time. When the sensing result is greater than the preset critical pressure, the control driver (50) drives the float (30) to move toward the cavity (13). When the sensing result is less than the preset critical pressure, the control driver (50) stops driving the float (30).

17. The automatic float pressing method according to claim 16, characterized in that, The driver (50) includes a drive motor (51) and an abutment (53). The abutment (53) is located on the output shaft (52) of the drive motor (51). The float (30) is reciprocally movably located within a preset floating range. The preset floating range is located between the abutment (53) and the cavity (13), including the top end relatively close to the abutment (53) and the bottom end relatively close to the cavity (13). When the sensing result is greater than a preset critical pressure, the control actuator (50) drives the float (30) to move toward the cavity (13); when the sensing result is less than the preset critical pressure, the control actuator (50) stops driving the float (30), including: When the sensing result is greater than the preset critical pressure, the control drive motor (51) drives the abutment (53) into the preset floating range and pushes the pressing part (32) to push the lifting part (31) to the bottom. When the sensing result is less than the preset critical pressure, the control drive motor (51) drives the abutment (53) to withdraw from the preset floating range so that the float (30) moves away from the cavity (13) and brings the pressing part (32) to the top.

18. The automatic float pressing method according to claim 15, characterized in that, The pressure cooker also includes a driver (50), which includes a drive motor (51) and an abutment (53). The abutment (53) is located on the output shaft (52) of the drive motor (51) and is used to abut against and push the pressing part (32). The method further includes: The control drive motor (51) drives the abutment member (53) to push the pressing part (32) so that the float (30) moves toward the cavity (13); Monitor the stall current of the drive motor (51) and compare the stall current with the preset critical current in real time; When the stall current is greater than the preset critical current, the drive motor (51) is controlled to drive the abutment (53) to push the pressing part (32). When the stall current is less than the preset critical current, the drive motor (51) is controlled to drive the abutment (53) to disengage from the pressing part (32).

19. The automatic float pressing method according to claim 18, characterized in that, The float (30) is reciprocally positioned within a preset floating range, which is located between the abutment (53) and the cavity (13), including the top end relatively close to the abutment (53) and the bottom end relatively close to the cavity (13). When the stall current is greater than a preset critical current, the drive motor (51) is controlled to drive the abutment (53) to push the pressing part (32). When the stall current is less than the preset critical current, the drive motor (51) is controlled to drive the abutment (53) to disengage from the pressing part (32), including: When the stall current is greater than the preset critical current, the drive motor (51) is controlled to drive the abutment (53) into the preset floating range and occupy at least the top. When the stall current is less than the preset critical current, the control drive motor (51) drives the abutment (53) to move away from the preset floating range so that the float (30) moves away from the cavity (13) and brings the pressing part (32) to the top.

20. The automatic float pressing method according to claim 18, characterized in that, The pressure cooker further includes a control component (60) connected to the vent valve (20), the control component (60) being used to control the opening and closing of the vent valve (20), the driver (50) being communicatively connected to the control component (60), and the method further including: At the moment the vent valve (20) switches to the open state, the driver (50) is started by the control component (60) to drive the float (30) to move toward the cavity (13).

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