Pressure cooking pot

Abstract

The utility model provides a pressure cooking pot. The pressure cooking pot comprises a pot, a floater, an air escape valve and a flow guide piece. 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.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a pressure cooking pot. Background Art

[0002] The lid of the pressure cooking pot is movably provided with a float, and the position of the float relative to the lid can indicate the air pressure in the pot. When the air pressure in the pot is high, the float is lifted up by the gas in the pot. After part of the gas in the pot is discharged, the gravity of the float will overcome the pressure of the gas on the float and cause the float to sink. In order to improve the safety of the product, some existing pressure cooking pots are provided with an anti-opening structure. After the float is lifted up, the anti-opening structure limits the lid and the pot body. Only after the float sinks can the limit on the lid be released to allow the lid to be opened. On this basis, some pressure cooking pots are also provided with a structure for users to manually press the float. Pressing the float to make it sink can quickly release the limit on the lid and quickly open the lid. Manually pressing the float not only requires applying a lot of pressure to the float, but also has the risk of scalding the hands. Utility Model Content

[0003] In view of this, the utility model provides a pressure cooking pot capable of automatically pressing down a float so as to quickly open a pot cover and a method for automatically pressing the float.

[0004] The pressure cooking pot provided by the utility model comprises:

[0005] The pot comprises a pot body and a pot cover, wherein a cavity is formed between the pot body and the pot cover;

[0006] A float is movably arranged on the pot cover, and the float comprises a lifting part and a pressing part which are arranged opposite to each other, and the lifting part faces the cavity;

[0007] A relief valve is provided on the cooker and has a valve passage;

[0008] The guide member has an air flow channel, wherein the air flow channel includes an end extending at least to the pressing portion and another end extending at least to the air release valve;

[0009] The chamber and the air flow channel are connected through the valve passage when the air relief valve is opened, and are blocked when the air relief valve is closed.

[0010] Compared with the prior art, the pressure cooking pot of the utility model utilizes the gas discharged from the inside of the pot to apply pressure to the pressing part to achieve automatic downward pressure of the float. The automatic downward pressure of the gas replaces the operation of the user manually pressing the float, which not only overcomes the disadvantage of manual difficulty in pressing the float, but also eliminates the risk of scalding the hands. Only the air release valve needs to be opened to automatically press down the float and the pot lid can be quickly opened, which brings better user experience and safety protection.

[0011] In one embodiment, the flow guide member includes a pressing tube section, the airflow channel includes a pressing flow channel formed in the pressing tube section, and the pressing tube section at least sleeves the pressing portion in the pressing flow channel.

[0012] With such arrangement, the airflow in the airflow channel can more concentratedly impact and push the pressing part when flowing through the pressing tube section, that is, more airflow participates in applying force to the pressing part, thereby improving the efficient utilization of the kinetic energy of the airflow in the airflow channel and helping to complete the automatic pressing of the float faster and easier.

[0013] In one embodiment, the pressing tube section is provided with an air leakage hole connecting the pressing flow channel and the outside of the pressing tube section.

[0014] With such arrangement, the airflow in the airflow channel can be discharged from the flow guide member in a timely manner after the pressure on the pressing portion is pushed, thereby preventing accidents caused by a continuous increase in the air pressure in the airflow channel.

[0015] In one embodiment, the pressing tube section includes a guide section and a sealing section, the tube wall of the guide section is slidably connected to the float, the air leakage hole is opened in the tube wall of the guide section, the end of the sealing section is sealed and connected to the pot cover, and the tube wall of the sealing section is movably sealed and connected to the float.

[0016] Such a configuration ensures that the gas in the cavity can only flow into the air flow channel through the valve channel and finally be discharged from the air leakage hole, thereby preventing the gas in the cavity from directly flowing into the pressing pipe section, and preventing the gas from failing to participate in applying force to the pressing part due to directly flowing into the pressing pipe section. Moreover, it does not affect the normal discharge of the gas from the air leakage hole, which helps to complete the pressing of the float faster and more efficiently through the gas.

[0017] In one embodiment, the guide member includes an air outlet pipe section, the air flow channel includes an air outlet flow channel formed in the air outlet pipe section, the air outlet pipe section sets at least part of the air release valve in the air outlet flow channel, and the cavity and the air outlet flow channel are connected through the valve channel when the air release valve is opened.

[0018] With such arrangement, the gas in the cavity can flow into the outlet flow channel after flowing out of the valve channel, thereby achieving the purpose of centrally introducing the gas in the cavity into the guide member, ensuring that more gas from the cavity can flow along the guide member to form a driving airflow so that the driving airflow impacts the pressing part with greater kinetic energy, which helps to quickly, easily and efficiently complete the automatic pressing of the float.

[0019] In one embodiment, the pot cover is provided with a valve body mounting hole, the air release valve is inserted into the valve body mounting hole, and the end of the air outlet pipe section is sealed and connected to the opening edge of the valve body mounting hole.

[0020] Such an arrangement ensures that the gas in the cavity can only flow into the air outlet pipe section through the valve channel, preventing the gas from leaking directly out of the valve body mounting hole and failing to flow into the guide member, thereby ensuring that the airflow in the guide member has sufficient kinetic energy to easily and quickly press the float.

[0021] In some embodiments, the float can be reciprocated in a preset floating range, the preset floating range includes a top end relatively far away from the cavity and a bottom end relatively close to the cavity, and in the length direction of the preset floating range, the position of the air leakage hole is located between the top end and the bottom end.

[0022] Such an arrangement can ensure that the driving airflow applies force to the pressing part and drives the float downward for a certain distance, and then is discharged from the guide member through the air leakage hole, thereby preventing the gas from being discharged from the guide member too early and failing to push the float, thereby fully utilizing the kinetic energy of the driving airflow.

[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 outlet flow channel, and the valve channel runs through the air inlet end and the air outlet end.

[0024] With such arrangement, the air flow enters the valve passage of the air relief valve in the cavity, and finally discharges the air relief valve in the outlet passage, so that the air flow has an initial velocity adapted to the air flow passage after leaving the air relief valve, thereby avoiding a strong impact on the guide member during the transfer of the air flow from the cavity to the air flow passage, and helping to more quickly form a driving air flow with strong kinetic energy and a certain flow direction.

[0025] In one embodiment, the pressure cooking pot further comprises a driver arranged on the pot, the driver is connected to the float, and the driver is used to drive the float to move toward the cavity.

[0026] With such arrangement, on the basis of the driving airflow applying force to the pressing part to drive the float, the driver can provide auxiliary power to ensure that the float is successfully driven downward; when the kinetic energy of the driving airflow in the guide member is insufficient, the driver can play a greater role and replace manual pressing of the float; when wear occurs between the float and the pot cover, or the float is contaminated and movement is blocked, the power applied by the driver to the float can enable the float to overcome the movement resistance more easily so that the float can be pressed down smoothly.

[0027] In one embodiment, the driver includes a driving motor and an abutment member, the driving motor is provided on the cooker, the abutment member is provided on an output shaft of the driving motor, and the abutment member can abut against and disengage from the pressing portion.

[0028] With this arrangement, it is easier for the driver to connect to the float and apply force to the float, and it also makes it easier and simpler to configure the float and the driver.

[0029] In one embodiment, the float can be reciprocated in a preset floating interval, and the preset floating interval is set between the abutment and the cavity, including a top end relatively close to the abutment and a bottom end relatively close to the cavity. When the pressing part is at the top end, the abutment exits the preset floating interval, and the abutment can enter the preset floating interval to push the float toward the cavity.

[0030] With such an arrangement, it is easier to switch between the driver applying pressure to the float and stopping applying pressure to the float, and the abutment member only needs to switch between the two states of entering the preset floating interval and exiting the preset floating interval. After the abutment member exits the preset floating interval, the float is still allowed to be lifted up by the gas in the cavity when the pressure cooking pot is used next time so as to bring the pressing part to the top.

[0031] In one embodiment, the flow guide member includes a pressing tube section with a side through hole, the airflow channel includes a pressing flow channel formed in the pressing tube section, the pressing flow channel extends at least to the pressing part, the output shaft passes through the side through hole, and the abutment member is located in the pressing flow channel.

[0032] Such a configuration is compatible with two automatic float pressing modes: using gas to impact the pressing part to press the float and using a driver to push the pressing part to press the float, and can minimize the opening size of the side perforations, thereby minimizing the amount of airflow that leaks from the side perforations to the outside of the pressing tube section, thereby maximizing the maintenance of the kinetic energy of the driving airflow in the guide member.

[0033] In one embodiment, the pressure cooking pot further comprises a control component connected to the air release valve, the control component being used to control the opening and closing of the air release valve, the driver being communicatively connected to the control component, and the driver being able to operate while the air release valve is opened to drive the float to move toward the cavity.

[0034] With such an arrangement, the driver can drive the float from the moment the gas is transferred from the chamber to the airflow channel, so that the driver drives the float to press down simultaneously with the airflow driving the float to press down, or even the driver drives the float to press down ahead of the airflow driving the float to press down, which helps to complete the float pressing faster.

[0035] In one embodiment, the pressure cooking pot further comprises a pressure sensing device connected to the driver, the pressure sensing device comprises a sensing end arranged in the air flow channel and / or the cavity, and the pressure sensing device is used to control the driver to output power to the float and stop outputting power to the float.

[0036] With this arrangement, the sensing result of the pressure sensing device can be used to characterize the air pressure inside the cavity. When the air pressure inside the cavity is at a high level, the driver participates in driving the float to speed up the downward pressure of the float, and stops driving the float when the air pressure inside the cavity is at a low level, which helps to reduce the energy consumption of the driver.

[0037] In one embodiment, the driver includes an abutment member disposed in the air flow channel, the abutment member can abut against and disengage from the pressing portion, and the sensing end is in the air flow channel and disposed on the abutment member.

[0038] With such an arrangement, the air pressure inside the cavity can be indirectly determined through the air pressure sensing result of the pressure sensing device in the air flow channel, thereby simplifying the configuration of the pressure sensing device.

[0039] The utility model provides an automatic float pressing method, which includes:

[0040] S10, opening the air release valve to allow the gas in the cavity to flow into the air flow channel through the valve channel;

[0041] S20, guiding the gas in the airflow channel to flow along the guide member to obtain a driving airflow flowing toward the pressing portion;

[0042] S30, applying force to the pressing portion by driving airflow to drive the float to move closer to the cavity.

[0043] Compared with the prior art, the utility model provides a brand-new float pressing method, which not only utilizes the gas discharged from the inside of the cookware to press the pressing part to automatically press the float, but also realizes the utilization of the gas discharged when the pressure cooking pot is vented and depressurized, which is in line with the current environmental protection and automation concepts; it also replaces the manual pressing operation of the user, thereby fundamentally eliminating the risk of scalding the hands by the pot cover and the float; in addition, the automatic downward pressing process of the float is started as the air release valve is opened, so the automatic pressing of the float can be completed more quickly, thereby allowing the user to open the pot cover more quickly.

[0044] In one embodiment, the pressure cooking pot further comprises a driver connected to the float and a pressure sensing device connected to the driver, wherein the pressure sensing device comprises a sensing end disposed in the air flow channel and / or the cavity;

[0045] The automatic float pressing method also includes:

[0046] S41, sensing the air pressure of the air flow channel and / or the cavity through a 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, the control driver drives the float to move toward the cavity; when the sensing result is less than the preset critical pressure, the control driver stops driving the float.

[0048] With such a configuration, the sensing result of the pressure sensing device can directly or indirectly represent the air pressure inside the cavity. The driver drives the float when the air pressure inside the cavity is high, and stops driving the float when the air pressure inside the cavity is low. This enables the driver to selectively assist in driving the float downward according to demand, which helps to reduce the energy consumption of the driver and the entire pressure cooking pot.

[0049] In one embodiment, the driver includes a driving motor and an abutment member, the abutment member is disposed on an output shaft of the driving motor, the float is reciprocatably disposed in a preset floating interval, the preset floating interval is disposed between the abutment member and the cavity, and includes a top end relatively close to the abutment member and a bottom end relatively close to the cavity;

[0050] When the sensing result is greater than the preset critical pressure, controlling the driver to drive the float toward the chamber, and when the sensing result is less than the preset critical pressure, controlling the driver to stop driving the float includes:

[0051] S421, when the sensing result is greater than the preset critical pressure, controlling the driving motor to drive the abutment member to enter the preset floating interval and push the pressing part to push the lifting part toward the bottom end;

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

[0053] With such an arrangement, it is easier and faster for the driver to switch between applying pressure to the float and stopping applying pressure to the float. The abutment only needs to switch between entering a preset floating interval and exiting the preset floating interval. When the abutment exits the preset floating interval, the float is allowed to be lifted up by the air pressure in the cavity the next time the pressure cooking pot is used so as to bring the pressing portion to the top.

[0054] In one embodiment, the pressure cooking pot further comprises a driver, the driver comprising a driving motor and an abutment member, the abutment member being arranged on an output shaft of the driving motor and being used to abut and push the pressing portion;

[0055] The automatic float pressing method also includes:

[0056] S51, controlling the driving motor to drive the abutment member to push the pressing portion so that the float moves toward the cavity;

[0057] S52, monitoring the stall current of the drive motor, and comparing the stall current with a preset critical current in real time;

[0058] S53, when the stall current is greater than the preset critical current, control the drive motor to drive the abutment member to push the pressing portion, and when the stall current is less than the preset critical current, control the drive motor to drive the abutment member to separate from the pressing portion.

[0059] With such arrangement, the size of the stall current is related to the height position of the float, and thus the pressing progress of the float can be determined by examining the size of the stall current. When the stall current is large, it means that the float still needs to be driven downward, and when the stall current is small, it means that the float is close to the height when the downward pressure is completed. Therefore, it is possible to selectively enable the driver to assist in driving the float downward according to the position state of the float, which helps to reduce the energy consumption of the driver and the entire pressure cooking pot.

[0060] In one embodiment, the float can be reciprocated in a preset floating interval, and the preset floating interval is set between the abutment member and the cavity, including a top end relatively close to the abutment member and a bottom end relatively close to the cavity;

[0061] When the locked-rotor current is greater than a preset critical current, controlling the driving motor to drive the abutment member to push the pressing portion, and when the locked-rotor current is less than the preset critical current, controlling the driving motor to drive the abutment member to separate from the pressing portion comprises:

[0062] S531, when the stall current is greater than a preset critical current, controlling the drive motor to drive the abutment member to enter a preset floating interval and occupy at least a top end;

[0063] S532. When the stall current is less than the preset critical current, the driving motor is controlled to drive the abutment member to withdraw from the preset floating interval to allow the float to move away from the cavity and bring the pressing part to the top.

[0064] With such an arrangement, it is easier and faster for the driver to switch between applying pressure to the float and stopping applying pressure to the float. The abutment only needs to switch between entering a preset floating interval and exiting the preset floating interval. When the abutment exits the preset floating interval, the float is allowed to be lifted up by the air pressure in the cavity the next time the pressure cooking pot is used so as to bring the pressing portion to the top.

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

[0066] S60, when the air relief valve is switched to the open state, the driver is started to operate through the control component to drive the float to move toward the cavity.

[0067] With this arrangement, the driver can drive the float from the moment the gas is transferred from the chamber to the airflow channel, so that the driver drives the float to press down synchronously with or even ahead of the airflow driving the float to press down, which helps to complete the float pressing faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A cross-sectional view of a pressure cooking pot according to an embodiment of the present invention;

[0069] Figure 2 A first partial cross-sectional view of a pressure cooking pot according to an embodiment of the present invention;

[0070] Figure 3 A second partial cross-sectional view of a pressure cooking pot according to an embodiment of the present invention;

[0071] Figure 4 It is a schematic diagram of an explosion of a pressure cooking pot according to an embodiment of the utility model;

[0072] Figure 5 for Figure 4 A partial structural diagram of a pressure cooking pot is shown.

[0073] Explanation of the reference numerals in the accompanying drawings: 10, cookware; 11, pot body; 12, pot cover; 121, valve body mounting hole; 122, floating through hole; 13, cavity; 20, air relief valve; 21, valve channel; 22, air inlet end; 23, air outlet end; 30, float; 31, lifting part; 32, pressing part; 40, guide member; 401, air flow channel; 41, air outlet pipe section; 411, air outlet flow channel; 42, guide pipe section; 43, pressing pipe section; 4301, guide section; 4302, sealing section; 431, pressing flow channel; 432, air relief hole; 433, side through hole; 50, driver; 51, drive motor; 52, output shaft; 53, abutment member; 60, control component. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0076] The utility model provides a pressure cooking pot and an automatic float pressing method based on the pressure cooking pot. When a user wants to open a pot cover 12 as soon as possible to enjoy food, the automatic float pressing method 30 of the utility model can be used to enable the pressure cooking pot to automatically press down the float 30 so as to quickly open the pot cover 12.

[0077] First, the pressure cooking pot of the utility model is introduced. Figure 1 The pressure cooking pot includes a cooker 10, a float 30, a degassing valve 20 and a guide member 40. The cooker 10 includes a cooker body 11 and a cooker cover 12. A cavity 13 for holding food is formed between the cooker body 11 and the cooker cover 12. The float 30 is movably arranged on the cooker cover 12. The float 30 includes a lifting portion 31 and a pressing portion 32 arranged opposite to each other. The lifting portion 31 faces the cavity 13 and can be used to receive the pressure of the gas in the cavity 13. The degassing valve 20 is arranged on the cooker 10 and has a valve channel 21. The valve channel 21 is unblocked when the degassing valve 20 is opened and blocked when the degassing valve 20 is closed. The guide member 40 has an air flow channel 401. The air flow channel 401 includes one end extending at least to the pressing portion 32 and the other end extending at least to the degassing valve 20. The cavity 13 and the air flow channel 401 are connected through the valve channel 21 when the degassing valve 20 is opened and blocked when the degassing valve 20 is closed.

[0078] Based on the composition and structure of the pressure cooking pot, the automatic float pressing method of the utility model includes:

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

[0080] S20, guiding the gas in the airflow channel 401 to flow along the guide member 40 to obtain a driving airflow flowing toward the pressing portion 32;

[0081] S30 , applying force to the pressing portion 32 by driving airflow to drive the float 30 to move closer to the cavity 13 .

[0082] The pressure cooking pot of the utility model utilizes the gas in the cavity 13 to impact the pressing part 32 to press the float 30. When the air release valve 20 is opened, the gas in the cavity 13 flows into the air flow channel 401 of the guide member 40 through the valve channel 21. Under the guidance of the guide member 40 and the continuous discharge of gas from the cavity 13 to the air flow channel 401, the gas entering the air flow channel 401 forms a driving air flow with a certain kinetic energy and flows toward the pressing part 32. The driving air flow applies pressure to the pressing part 32 to drive the float 30 to move toward the cavity 13. The process of the float 30 moving toward the cavity 13 is the process of pressing the float 30 downward. Therefore, the user does not need to manually press the float 30, eliminating the risk of the user's hand being scalded by the float 30 or the pot cover 12, and the pressure cooking pot automatically presses down the float 30, bringing a better user experience.

[0083] The utility model also provides a new method for pressing the float 30, which uses the gas discharged from the inside of the cooker 10 to apply force to the pressing part 32 to automatically press the float 30, thereby realizing the utilization of the gas discharged when the pressure cooking pot is vented and depressurized, which is in line with today's environmental protection and automation concepts; and fundamentally eliminates the risk of scalding the user's hands. The automatic downward pressing process of the float 30 is started as the degassing valve 20 is opened, so that the automatic pressing of the float 30 can be completed more quickly, thereby allowing the user to open the pot cover 12 more quickly.

[0084] See also Figure 2 to Figure 4 In some embodiments, the pot cover 12 is provided with a valve body mounting hole 121 communicating with the 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 cavity 13, and also includes an air outlet end 23 protruding outward from the pot cover 12, and the valve channel 21 connects the air inlet end 22 and the air outlet end 23.

[0085] Optionally, the air relief valve 20 includes a coaxially arranged valve core and a valve body, the valve body is inserted into the valve body mounting hole 121, the valve core is movably arranged relative to the valve body in the axial direction, the air inlet end 22 and the air outlet end 23 are respectively formed on the valve core and the valve body, and the valve core and the valve body are opened or closed through axial relative movement.

[0086] Further, see Figure 2-Figure 3 , Figure 4-5 The pressure cooking pot further comprises 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, see Figure 2-Figure 3 , Figure 4-5 The guide member 40 includes an air outlet pipe section 41, and the air flow channel 401 includes an air outlet flow channel 411 formed in the air outlet pipe section 41. The air outlet pipe section 41 sleeves at least a portion of the air release valve 20 in the air outlet flow channel 411. 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. When the air release valve 20 is opened, the valve channel 21 connects the cavity 13 with the air outlet flow channel 411.

[0088] With such arrangement, the gas in the cavity 13 can be centrally introduced into the guide member 40 after flowing out of the valve channel 21, ensuring that more gas from the cavity 13 flows along the airflow channel 401 to form a driving airflow, which helps to increase the kinetic energy of the driving airflow and apply force to the pressing portion 32 more easily and effectively.

[0089] Preferably, the end of the outlet pipe section 41 is sealed and connected to the opening edge of the valve body mounting hole 121. With such a configuration, the gas in the cavity 13 can flow into the valve channel 21 and flow to the outlet channel 411 in a concentrated manner. The valve channel 21 is the only channel for the gas in the cavity 13 to flow outward, which can prevent the gas from leaking outward from the valve body mounting hole 121, ensuring that the driving airflow has sufficient kinetic energy to easily and efficiently press the float 30.

[0090] Figure 2-Figure 3 In the illustrated embodiment, the outlet pipe section 41 is coaxially sleeved on the outer periphery of the air relief valve 20, the outlet end 23 is sleeved by the outlet pipe section 41 in the outlet flow channel 411, the valve channel 21 extends along the axial direction of the air relief valve 20, and the extension direction of the valve channel 21 is the same or substantially the same as the extension direction of the outlet pipe section 41. After the gas flowing along the valve channel 21 flows out of the air relief valve 20, the gas will obtain the same flow velocity direction as the extension direction of the outlet pipe section 41, thereby alleviating the impact of the gas on the outlet pipe section 41 and reducing the kinetic energy loss of the gas.

[0091] See also Figure 2-Figure 3 In some embodiments, the pot cover 12 is disposed opposite to the bottom wall of the pot body 11, and the pot cover 12 is provided with a floating through hole 122 communicating with the cavity 13, and the float 30 can be reciprocatedly disposed in the floating through hole 122. When the pressing portion 32 is subjected to pressure, the float 30 passes through the movable through hole and approaches the cavity 13, the float 30 is pressed down, and the lifting portion 31 approaches the bottom wall of the pot body 11; when the lifting portion 31 is subjected to the pressure of the air inside the cavity 13, the float 30 passes through the movable through hole and moves away from the cavity 13, thereby the float 30 floats up, and the lifting portion 31 moves away from the bottom wall of the pot body 11.

[0092] Optionally, the float 30 is slidably matched with the hole wall of the floating through hole 122, and the two are coaxially adapted, so that the float 30 can be reciprocated and translated in the axial direction through the floating through hole 122. In this way, the lifting portion 31 is always facing the cavity 13 and the bottom wall of the pot body 11, and the pressing portion 32 is always away from the cavity 13 and the bottom wall of the pot body 11. The float 30 can react more quickly to the pressure acting on the lifting portion 31 or the pressing portion 32, thereby quickly moving in the axial direction.

[0093] Further, see Figure 2-Figure 3 , Figure 4-5, 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. Optionally, when the float 30 floats to the position farthest from the bottom wall of the pot body 11, the pressing tube section 43 at least sets the pressing part 32 in the pressing flow channel 431, and when the float 30 sinks to the position closest to the bottom wall of the pot body 11, the pressing tube section 43 also at least sets the pressing part 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 pot body 11, the pressing tube section 43 does not need to set the pressing part 32 in it.

[0094] Optionally, the pressing tube section 43 is a straight tube section, the length direction of the pressing tube section 43 is the same as the axial direction of the floating through hole 122, the float 30 is a columnar element, the lifting portion 31 and the pressing portion 32 are respectively formed at the two axial ends of the float 30, wherein the lifting portion 31 is one end of the float 30 relatively close to the bottom wall of the pot body 11, and the pressing portion 32 is the other end of the float 30 relatively far from the bottom wall of the pot body 11. The peripheral side of the float 30 is slidably connected to the tube wall of the pressing tube section 43, and even when the float 30 sinks to the position closest to the bottom of the pot body 11, the peripheral side of the pressing portion 32 is still adapted to the tube wall of the pressing tube section 43.

[0095] With such arrangement, no matter whether the float 30 is subjected to force on the pressing portion 32 or the lifting portion 31 , the posture of the float 30 is always stable, and the lifting portion 31 is always facing the cavity 13 , ensuring that the float 30 can be quickly floated up by the pressure of the gas in the cavity 13 , and ensuring that the float 30 can quickly sink when an external force acts on the pressing portion 32 .

[0096] exist Figure 2-Figure 3 In the illustrated embodiment, the float 30 can make reciprocating motion relative to the pot cover 12 within a preset floating range along the axial direction of the floating through hole 122 and the length direction of the pressing tube section 43. The preset floating range is a linear translation range extending along the axis of the floating through hole 122. The total length of the preset floating range is greater than the axial length of the float 30. The two extreme positions of the preset floating range are the top end and the bottom end, respectively. The top end is located at one end of the preset floating range away from the cavity 13, and the bottom end is located at the other end of the preset floating range.

[0097] Specifically, when the gas in the chamber 13 applies pressure to the lifting portion 31, thereby lifting the float 30 upward to float relative to the pot cover 12, the state of the float 30 is as follows: Figure 2 As shown, at this time, the pressing portion 32 is at the top, and the lifting portion 31 is higher than the bottom; when an external force acts on the pressing portion 32 to press the float 30 to sink relative to the pot cover 12, the state of the float 30 is as follows Figure 3 As shown, at this time, the pressing portion 32 is lower than the top end, and the lifting portion 31 is at the bottom end.

[0098] Further, see Figure 2-Figure 3 , Figure 4-5 The pressing tube section 43 is provided with an air leakage hole 432 connecting the pressing flow channel 431 and the outside of the pressing tube section 43. With such a configuration, the airflow in the airflow channel 401 can be discharged from the guide member 40 in time after the pressing portion 32 is pushed by the force, thereby preventing the guide member 40 from being damaged due to the continuous increase in the internal pressure of the guide member 40, thereby improving the safety of the pressure cooking pot.

[0099] Specifically, see Figure 2-Figure 3 The pressing tube section 43 includes a coaxially connected guide section 4301 and a sealing section 4302. The axial direction of the guide section 4301 is consistent with the axial direction of the through hole of the float 30. The pressing flow channel 431 is formed in the guide section 4301 and the sealing section 4302. The tube wall of the guide section 4301 and the peripheral side of the float 30 are slidably connected. The air leakage hole 432 is opened in the guide section 4301. The sealing section 4302 is sealed and connected to the opening edge of the floating through hole 122. The peripheral side of the float 30 and the tube wall of the sealing section 4302 are movably sealed. The hole wall of the through hole of the float 30 and the guide section 4301 together guide the float 30 to accurately perform a linear reciprocating motion between the top and the bottom along the preset floating interval.

[0100] With such arrangement, the gas in the cavity 13 will not be able to leak outward from the floating through hole 122, nor will it be able to leak outward along the tube wall between the float 30 and the sealing section 4302. When the air relief valve 20 is opened, the valve channel 21 is the only channel through which the gas in the cavity 13 can flow outward, which means that the gas in the cavity 13 can and can only flow into the air flow channel 401 through the valve channel 21, thereby forming a driving airflow under the guidance of the guide member 40. In this way, the kinetic energy of the driving airflow can be maximized, so that the driving airflow is sufficient to press the float 30.

[0101] Further, see Figure 2-Figure 3 , along the length direction of the floating through hole 122 and the pressing tube section 43 (i.e., the length direction of the preset floating interval), the position of the leak hole 432 is at least not higher than the position of the top, that is, the distance from the leak hole 432 to the bottom wall of the pot body 11 is at least not greater than the maximum distance from the pressing portion 32 to the bottom wall of the pot body 11. Optionally, the position of the leak hole 432 is located between the top and the bottom. Such a configuration can ensure that the driving airflow applies force to the pressing portion 32 and presses the float 30 downward for a certain distance, and then discharges the guide member 40 through the leak hole 432, thereby preventing part of the gas from being discharged from the guide member 40 too early and failing to push the float 30, and further fully utilizing the kinetic energy of the driving airflow.

[0102] Further, see Figure 2-Figure 3 , Figure 4-5The guide member 40 also includes a guide pipe section 42, an air outlet pipe section 41 and a pressing pipe section 43 are respectively connected to the two ends of the guide pipe section 42, and a curved transition connection is formed between the air outlet pipe section 41 and the guide pipe section 42, and between the pressing pipe section 43 and the guide pipe section 42 to reduce the kinetic energy loss of the driving airflow in the airflow channel 401. The guide pipe section 42 is used to guide the gas in the airflow channel 401 to form a driving airflow.

[0103] In some embodiments, the pressure cooking pot further includes a driver 50 disposed on the cooker 10, and the driver 50 is connected to the float 30. On the basis of driving the airflow to push the pressing portion 32 to drive the float 30 to be pressed down, the driver 50 can additionally output power to the float 30 to drive the float 30 to move toward the cavity 13, thereby ensuring that the float 30 is finally successfully pressed down.

[0104] See also Figure 2-Figure 3 , Figure 4-5 In some embodiments, the driver 50 includes a driving motor 51 and a contact member 53. The driving motor 51 is installed on the pot cover 12 or the pot body 11. The contact member 53 is provided on the output shaft 52 of the driving motor 51. Under the drive of the driving motor 51, the contact member 53 can contact and disengage from the pressing portion 32. When the driver 50 needs to provide additional power to assist in driving the float 30 downward, the driving motor 51 drives the contact member 53 to a position where it contacts the pressing portion 32 through the output shaft 52, and then the contact member 53 applies pressure to the pressing portion 32 under the drive of the driving motor 51; when the float 30 is pressed down to the right position, the driving motor 51 can remove the contact member 53 from the pressing portion 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 cooking pot is used next time.

[0105] Specifically, the preset floating interval for the reciprocating movement of the float 30 relative to the pot cover 12 is set between the abutment member 53 and the cavity 13. Figure 2 As shown, the pressing portion 32 is at the top end at this time, and the abutment member 53 exits the preset floating interval; Figure 3 As shown, at this time, the pressing portion 32 enters the preset floating interval and occupies at least the top end, so the pressing portion 32 moves away from the top end and moves toward the cavity 13 under the push of the abutment member 53. Figure 2 to Figure 5 In the illustrated embodiment, the abutment member 53 rotates with the output shaft 52 to enter or exit the preset floating interval. The abutment member 53 is a plate-shaped member fixed to the output shaft 52. The abutment member 53 applies a thrust to the pressing portion 32 through its edge. In other embodiments, the abutment member 53 can also be configured to move with the output shaft 52 to enter or exit the preset floating interval.

[0106] Optionally, see Figure 2-Figure 3 , Figure 4-5The preset floating interval is formed in the pressing tube section 43, that is, the length direction of the pressing tube section 43 defines the extension direction of the preset floating interval. The pressing tube section 43 is provided with a side through hole 433 connected to the pressing flow channel 431. The driving motor 51 is installed on the pot cover 12. The output shaft 52 extends along one of the radial directions of the pressing tube section 43 and passes through the side through hole 433. Regardless of whether the abutment member 53 enters the preset floating interval or exits the preset floating interval driven by the output shaft 52, the abutment member 53 is always located in the pressing flow channel 431.

[0107] Such a configuration can be compatible with arranging the float 30 in the pressing tube section 43 , thereby facilitating the kinetic energy of the driving airflow to act more on the pressing portion 32 to achieve efficient and rapid pressing of the float 30 .

[0108] Furthermore, the pressure cooking pot also includes a pressure sensing device connected to the driver 50, the pressure sensing device includes a sensing end arranged in the airflow channel 401 and / or the cavity 13, and is used to sense the air pressure in the airflow channel 401 and / or the cavity 13. The pressure of the gas in the airflow channel 401 and / or the cavity 13 acting on the sensing end can cause the sensing end to produce stress changes or strain changes. The stress changes and strain changes are both positively correlated with the air pressure. Therefore, the stress changes or strain changes at the sensing end can represent the air pressure in the airflow channel 401 and / or the 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 control the driver 50 to stop outputting power to the float 30. When the air pressure in the air flow channel 401 and / or the cavity 13 is relatively high, it means that the float 30 can be driven downward with the assistance of the driver 50, so the pressure sensing device controls the driver 50 to operate to apply force to the float 30. When the air pressure in the air flow channel 401 and / or the cavity 13 is relatively low, it means that the float 30 is about to or has been pressed down into place, and the driver 50 does not need to continue to apply force to the float 30, so the pressure sensing device controls the driver 50 to stop driving the float 30, and the abutment 53 is driven to disengage from the pressing portion 32.

[0109] Based on this, the automatic float pressing method of the utility model also includes:

[0110] S41, sensing the air pressure of the air flow channel 401 and / or the cavity 13 through a 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, the control driver 50 drives the float 30 to interact with the chamber 13 ; when the sensing result is less than the preset critical pressure, the control driver 50 stops driving the float 30 .

[0112] The preset critical pressure is a pressure value artificially set based on product development and testing 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 a floating state, and it is necessary to release some of the gas in the cavity 13 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, the gravity of the float 30 will overcome the pressure of the gas acting on the lifting part 31 and sink relative to the pot cover 12, and it is safe to open the pot cover 12 at this time.

[0113] Optionally, the sensing end may be a strain gauge fixed to the abutment 53. The size of the strain gauge is much smaller than that of the abutment 53, and the force of the pressing portion 32 reacting on the abutment 53 will not cause the strain gauge to generate stress and strain. The strain gauge is only used to generate stress and strain when subjected to gas pressure.

[0114] Further, see Figure 2 and Figure 3 Step S42: when the sensing result is greater than the preset critical pressure, the driver 50 is controlled to drive the float 30 to interact with the chamber 13; when the sensing result is less than the preset critical pressure, the driver 50 is controlled to stop driving the float 30; and the method further includes:

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

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

[0117] Step S422 can be summarized as a reset step of the driver 50. It should be noted that the reset of the driver 50 does not mean that the float 30 immediately floats up relative to the pot cover 12, but that the abutment 53 will no longer occupy the top. In fact, after the abutment 53 withdraws from the preset floating interval, the float 30 will still keep the lifting part 31 at the bottom under the action of gravity. Only when the gas in the cavity 13 applies an upward thrust to the lifting part 31 during the next use of the pressure cooking pot can the float 30 be lifted up again.

[0118] In other embodiments, the pressure sensing device can also be eliminated, and the basic control component 60 and the driver 50 are connected in communication. For example, when the control component 60 is a solenoid valve, the solenoid valve is connected in communication with the drive 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 component 60, the driver 50 can operate and drive the float 30 to move toward the chamber 13. In this way, the process of the driver 50 driving the float 30 to press down starts at the moment the air release valve 20 is opened, and the driver 50 drives the float 30 to press down and drives the airflow to drive the float 30 to press down simultaneously, and even the process of the driver 50 driving the float 30 to press down is carried out first.

[0119] Furthermore, the automatic float pressing method of the utility model also includes:

[0120] S60, when the air release valve 20 is switched to the open state, the driver 50 is controlled by the control component 60 to start running so as to drive the float 30 to move toward the chamber 13;

[0121] S51, controlling the driving motor 51 to drive the abutment member 53 to push the pressing portion 32 so that the float 30 moves toward the cavity 13;

[0122] S52, monitoring the stall current of the drive motor 51, and comparing the stall current with a preset critical current in real time;

[0123] S53, when the stall current is greater than the preset critical current, the driving motor 51 is controlled to drive the abutment 53 to push the pressing portion 32; when the stall current is less than the preset critical current, the driving motor 51 is controlled to drive the abutment 53 to separate from the pressing portion 32.

[0124] Step S60 indicates that the two processes of the valve channel 21 connecting the cavity 13 and the airflow channel 401 and the driver 50 driving the float 30 to be pressed down are opened at the same time, so that the driver 50 drives the float 30 to be pressed down and drives the airflow to drive the float 30 to be pressed down simultaneously, and even the process of the driver 50 driving the float 30 to be pressed down takes the lead, which can speed up the downward pressure of the float 30 and facilitate the user to open the pot cover 12 faster.

[0125] When the abutment 53 abuts against the pressing portion 32 driven by the drive motor 51, the pressing portion 32 applies a reaction force to the abutment 53, and the reaction force is opposite to the direction of the power generated by the drive motor 51, thereby generating a stall current inside the drive motor 51, and as the float 30 gradually moves from the top to the bottom in the preset floating range, the pressure of the float 30 reacting on the pressing portion 32 tends to decrease, and the stall current in the drive motor 51 tends to decrease. Therefore, the magnitude of the stall current is positively correlated with the position of the float 30 in the preset floating range, that is, the closer the float 30 is to the cavity 13 and the closer the float 30 is to the bottom wall of the pot body 11, the smaller the stall current is, and the lower the air pressure in the cavity 13 and the air flow channel 401 is. Therefore, the stall current can be used to indirectly characterize the air pressure in the cavity 13 and the air flow channel 401.

[0126] The preset critical current is a current value artificially set based on product development and testing experience. When the stall current is greater than the preset critical current, the pressure of the float 30 acting on the abutment 53 is relatively large, the float 30 is still in a floating state relative to the pot cover 12, and the air pressure in the cavity 13 and the air flow channel 401 is still at a relatively high level, and some of the gas in the cavity 13 needs to be released before the pot cover 12 can be safely opened; when the stall current is less than the preset critical value, the pressure of the float 30 acting on the abutment 53 is small or even negligible, at this time the float 30 is in a position of sinking relative to the pot cover 12, and the air pressure in the cavity 13 and the air flow channel 401 drops to a level close to or even the same as that outside the pot 10, at this time it is safe to open the pot cover 12, so the driver 50 does not need to apply force to the pressing part 32.

[0127] Further, step S53, when the locked-rotor current is greater than the preset critical current, controlling the drive motor 51 to drive the abutment 53 to push the pressing portion 32, and when the locked-rotor current is less than the preset critical current, controlling the drive motor 51 to drive the abutment 53 to disengage from the pressing portion 32 includes:

[0128] S531, when the stall current is greater than the preset critical current, controlling the driving motor 51 to drive the abutment member 53 to enter the preset floating interval and at least occupy the top end;

[0129] S532, when the stall current is less than the preset critical current, control the driving motor 51 to drive the abutment member 53 to withdraw from the preset floating interval to allow the float 30 to move away from the cavity 13 and bring the pressing portion 32 to the top.

[0130] Step S532 can be summarized as a reset step of the driver 50. It should be noted that the reset of the driver 50 does not mean that the float 30 immediately floats up relative to the pot cover 12, but that the abutment 53 will no longer occupy the top. In fact, after the abutment 53 withdraws from the preset floating interval, the float 30 will still keep the lifting part 31 at the bottom under the action of gravity. Only when the gas in the cavity 13 applies an upward thrust to the lifting part 31 during the next use of the pressure cooking pot can the float 30 be lifted up again.

[0131] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A pressure cooking pot, characterized in that: include: A cooker (10) comprises a cooker body (11) and a cooker cover (12), wherein a receiving cavity (13) is formed between the cooker body (11) and the cooker cover (12); A float (30) is movably arranged on the pot cover (12), the float (30) comprising a lifting portion (31) and a pressing portion (32) arranged opposite to each other, the lifting portion (31) facing the cavity (13); A gas release valve (20) is provided on the cooker (10) and has a valve passage (21); A flow guide (40) having an air flow channel (401), wherein the air flow channel (401) includes one end extending at least to the pressing portion (32) and another end extending at least to the air release valve (20); The chamber (13) and the air flow channel (401) are connected through the valve channel (21) when the air relief valve (20) is opened, and are blocked when the air relief valve (20) is closed.

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

3. The pressure cooking pot according to claim 2, characterized in that The pressing tube section (43) is provided with an air leakage hole (432) which communicates with the pressing flow channel (431) and the outside of the pressing tube section (43).

4. The pressure cooking pot according to claim 3, characterized in that The pressing tube section (43) comprises a guiding section (4301) and a sealing section (4302); the tube wall of the guiding section (4301) is slidably connected to the float (30); the air leakage hole (432) is provided in the tube wall of the guiding section (4301); the end of the sealing section (4302) is sealed to the pot cover (12); and the tube wall of the sealing section (4302) is movably sealed to the float (30).

5. The pressure cooking pot according to claim 4, characterized in that The float (30) is reciprocatably disposed within a preset floating interval, wherein the preset floating interval includes a top end relatively far from the cavity (13) and a bottom end relatively close to the cavity (13), and in the length direction of the preset floating interval, the position of the air leakage hole (432) is located between the top end and the bottom end.

6. The pressure cooking pot according to claim 1, characterized in that The flow guide (40) comprises an air outlet pipe section (41), the air flow channel (401) comprises an air outlet flow passage (411) formed in the air outlet pipe section (41), the air outlet pipe section (41) sleeves at least a portion of the air relief valve (20) in the air outlet flow passage (411), and the cavity (13) and the air outlet flow passage (411) are connected through the valve passage (21) when the air relief valve (20) is opened.

7. The pressure cooking pot according to claim 6, characterized in that The pot cover (12) is provided with a valve body mounting hole (121), the air release valve (20) is inserted into the valve body mounting hole (121), and the end of the air outlet pipe section (41) is sealed and connected to the opening edge of the valve body mounting hole (121); and / or, The air release valve (20) comprises an air inlet end (22) extending into the cavity (13) and an air outlet end (23) located in the air outlet passage (411), and the valve passage (21) passes through the air inlet end (22) and the air outlet end (23).

8. The pressure cooking pot according to any one of claims 1 to 7, characterized in that: The pressure cooking pot further comprises a driver (50) arranged on the pot (10), wherein the driver (50) is connected to the float (30), and the driver (50) is 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) comprises a driving motor (51) and an abutment member (53); the driving motor (51) is arranged on the cooker (10); the abutment member (53) is arranged on an output shaft (52) of the driving motor (51); and the abutment member (53) is capable of abutting against and disengaging from the pressing portion (32).

10. The pressure cooking pot according to claim 9, characterized in that The float (30) can be reciprocated in a preset floating interval, and the preset floating interval is arranged 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 portion (32) is at the top end, the abutment (53) exits the preset floating interval, and the abutment (53) can enter the preset floating interval to push the float (30) toward the cavity (13).

11. The pressure cooking pot according to claim 9, characterized in that The flow guide member (40) includes a pressing tube section (43) having a side through hole (433), the air flow 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 portion (32), the output shaft (52) passes through the side through hole (433), and the abutment member (53) is located in the pressing flow channel (431).

12. The pressure cooking pot according to claim 8, characterized in that The pressure cooking pot further comprises a control component (60) connected to the air release valve (20), the control component (60) being used to control the opening and closing of the air release valve (20), the driver (50) being communicatively connected to the control component (60), and the driver (50) being capable of operating simultaneously when the air release valve (20) is opened to drive the float (30) to move toward the cavity (13).

13. The pressure cooking pot according to claim 8, characterized in that The pressure cooking pot further comprises a pressure sensing device connected to the driver (50), the pressure sensing device comprising a sensing end arranged in the air flow channel (401) and / or the containing cavity (13), and the pressure sensing 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 cooking pot according to claim 13, characterized in that The driver (50) comprises an abutment member (53) disposed in the airflow channel (401), the abutment member (53) being capable of abutting against and disengaging from the pressing portion (32), and the sensing end being in the airflow channel (401) and disposed on the abutment member (53).

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