Pot cover assembly and cooking utensil

Abstract

The pot cover assembly comprises a cover body, a first pressure relief opening and a second pressure relief opening are formed in the cover body, a first pressure relief valve is arranged at the first pressure relief opening, and a second pressure relief valve is arranged at the second pressure relief opening. The first pressure relief valve can sink to seal the first pressure relief opening or float upwards to open the first pressure relief opening, the second pressure relief valve can sink to open the second pressure relief opening or float upwards to seal the second pressure relief opening, the cover body is provided with a cover opening button and a limiting piece, and the limiting piece acts on the first pressure relief valve to enable the first pressure relief valve to be kept in a sealed state. The cover opening button can drive the limiting piece to move so that the limiting piece can be separated from the first pressure release valve. When the cover is opened, at least one of the first pressure relief opening and the second pressure relief opening is in a conducting state, so that the inside and the outside of the pot are communicated, the balance of air pressure inside and outside the pot is ensured, the problems of high-pressure cover collapse and negative-pressure cover suction are effectively solved, the risk during cover opening and convenience during cover opening are reduced, and the use experience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and particularly relates to a pot lid assembly and a cooking appliance. Background Art

[0002] After the pressure cooking of a cooking appliance with a pressure cooking function (such as a pressure cooker, a micro-pressure rice cooker, etc.) is completed, it is necessary to release the pressure before the lid can be opened. The common pressure release methods are automatic pressure release and manual pressure release. Automatic pressure release means that after the cooking program ends, the control unit of the cooking appliance controls the automatic pressure release until the pressure reaches the range where the lid can be opened. Manual pressure release requires the user to manually press a pressure release button or other structures to release the pressure after the cooking program ends.

[0003] However, no matter which pressure release method is used, the pressure release stops after the pressure in the pot drops to a certain value. If the user does not immediately open the lid at this time, but chooses to continue simmering the food for a period of time, or the user scoops out some food and then closes the lid again. Then the residual heat in the pot will continue to heat the air in the pot, causing the air pressure in the pot to rise again. Therefore, when the user opens the lid next time, the phenomenon of the lid popping open is likely to occur. In addition, under the action of the temperature difference inside and outside the pot and the liquid seal at the joint of the lid and the inner pot lid, a negative pressure effect will also be generated inside the pot, making the lid tightly sucked on the pot body, and it is difficult for the user to open the lid.

[0004] Based on this, during the lid opening process, there are often two situations: high-pressure lid popping and negative-pressure lid sucking inside the pot, both of which will cause difficulties or risks in opening the lid. Although some cooking appliances can lift the weight during lid opening, in the case of negative pressure inside the pot, the weight is also subject to suction in addition to its own gravity, resulting in a more laborious action of lifting the weight and inconvenient operation for the user.

[0005] Therefore, how to effectively solve the problem of difficult lid opening for various different situations of the air pressure inside the pot has become an urgent technical problem in this field. Summary of the Utility Model

[0006] The utility model provides a pot lid assembly and a cooking appliance to solve the problem that when opening the lid after cooking, there is negative pressure or high pressure inside the pot, which will cause the lid to be sucked or popped open, resulting in difficulty in opening the lid or risk during lid opening, thereby affecting the use experience.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A pot lid assembly includes a lid body. The lid body is provided with a first pressure relief port and a second pressure relief port. A first pressure relief valve is arranged at the first pressure relief port, and a second pressure relief valve is arranged at the second pressure relief port. The first pressure relief valve can sink to seal the first pressure relief port or float up to open the first pressure relief port. The second pressure relief valve can sink to open the second pressure relief port or float up to seal the second pressure relief port. The lid body is further provided with an opening button and a limiting member. The limiting member acts on the first pressure relief valve to keep the first pressure relief valve in a state of sealing the first pressure relief port. The opening button can drive the limiting member to move so that the limiting member disengages from the first pressure relief valve.

[0009] The pot lid assembly of the present utility model further has the following additional technical features:

[0010] The limiting member is slidably connected to the lid body so that the limiting member can move relative to the first pressure relief valve; alternatively, the limiting member has a connecting portion rotatably connected to the lid body, as well as an induction end located at one end of the connecting portion and an acting end located at the other end of the connecting portion. The limiting member can rotate around the connecting portion so that the acting end presses the first pressure relief valve or disengages from the first pressure relief valve.

[0011] The pot lid assembly further includes an electromagnetic valve arranged on the lid body. The electromagnetic valve has a push rod. One end of the push rod cooperates with the opening button, and the other end acts on the limiting member to drive the limiting member to move.

[0012] The pot lid assembly further includes a transmission member. The opening button drives the push rod through the transmission member. The lid body is further provided with a float valve. The float valve can float up and down under the action of air pressure. In the floating state of the float valve, the float valve is in a stop fit with the transmission member to limit the movement of the transmission member.

[0013] The electromagnetic valve is electrically connected to a control unit to have an electrically controlled state. In the electrically controlled state, the push rod reciprocates to intermittently drive the limiting member to move.

[0014] A pressing member is arranged between the limiting member and the first pressure relief valve. The limiting member presses the first pressure relief valve through the pressing member. The lid body is further provided with a first elastic member. The first elastic member pushes the limiting member to press the pressing member downward.

[0015] The pot lid assembly is provided with an exhaust passage communicating the inside of the pot with the outside. The second pressure relief port is arranged in the exhaust passage; alternatively, the second pressure relief port communicates with the exhaust passage.

[0016] The lid body is further provided with a pressure limiting port and a pressure limiting valve arranged at the pressure limiting port. A second elastic member is arranged at the pressure limiting valve so that the pressure limiting valve sinks to seal the pressure limiting port.

[0017] The second pressure relief valve has a sealing portion located below the lid body. The sealing portion includes a body and a sealing rib protruding upward. In the floating state of the second pressure relief valve, the sealing rib abuts against the lower surface of the lid body for sealing, and there is a gap between the body and the lid body.

[0018] The present utility model also discloses a cooking appliance, which includes a pot body having a cooking cavity, and further includes the above-mentioned lid assembly; a first pressure relief port and a second pressure relief port communicate with the cooking cavity, and the lid assembly is further provided with a locking member for locking with the pot body, and the opening button can drive the locking member to move so that the lid assembly is unlocked from the pot body.

[0019] Due to the adoption of the above technical solutions, the beneficial effects achieved by the present utility model are as follows:

[0020] 1. In the present utility model, the lid is provided with a first pressure relief valve and a second pressure relief valve. Among them, the sealing methods of the first pressure relief valve and the second pressure relief valve are different. When the first pressure relief valve floats upward, it opens the first pressure relief port, and when it sinks, it seals the first pressure relief port. When the second pressure relief valve floats upward, it seals the second pressure relief port, and when it sinks, it opens the second pressure relief port. When the opening button is not pressed, the limiting member acts on the first pressure relief valve to keep the first pressure relief valve in the state of sealing the first pressure relief port. As the cooking progresses and the air pressure in the pot increases, the second pressure relief valve moves upward under the push of the air pressure to seal the second pressure relief port. At this time, both the first pressure relief port and the second pressure relief port are sealed, and pressure cooking can be carried out. After cooking is completed and the pressure is relieved, when the user presses the opening button to open the lid, the opening button synchronously drives the limiting member, so that the limiting member loses the limitation on the first pressure relief valve. At this time, the first pressure relief valve can freely float up and down. At this time, if the inside of the pot is in a high-pressure environment, the gas in the pot will push the first pressure relief valve to float upward, thereby conducting the first pressure relief port, and the gas in the pot can be discharged through the first pressure relief port. If the inside of the pot is in a negative-pressure environment, the second pressure relief valve will be sucked downward under the action of the air pressure and then be in a sinking position, conducting the second pressure relief port, and the outside air can enter the pot through the second pressure relief port to balance the internal and external air pressures.

[0021] In this way, it is ensured that at least one of the first pressure relief port and the second pressure relief port is in a conducting state when opening the lid, so that the inside and outside of the pot are connected, thereby ensuring the balance of the internal and external air pressures of the pot, effectively solving the problems of high-pressure lid bursting and negative-pressure lid suction, reducing the risk and improving the convenience when opening the lid, enabling the user to quickly open the lid, and improving the use experience.

[0022] 2. As a preferred embodiment of the present utility model, the pot lid assembly further includes a solenoid valve disposed on the lid body. The solenoid valve has a push rod, one end of the push rod is engaged with the open lid button, and the other end acts on the limiting member to drive the limiting member to move. By the cooperation of the solenoid valve and the limiting member, on the one hand, automatic pressure relief after cooking can be realized. The action of the solenoid valve is associated with the cooking program. After cooking is completed, the control unit controls the solenoid valve to work automatically, driving the limiting member to move to release the restriction on the first pressure relief valve, so that the first pressure relief valve can float upward under the push of the gas in the pot to achieve exhaust pressure relief. On the other hand, the push rod of the solenoid valve is also associated with the open lid button, so that when the user presses the open lid button, the open lid button also acts on the push rod, triggering the solenoid valve to work again and causing the limiting member to move. Therefore, the solenoid valve is realized to have two control methods: electric control and manual control. And the two methods only have different power sources applied to the push rod, and the movement mode of the push rod and the transmission mode to the limiting member are the same. Therefore, the same set of transmission mechanism is used to achieve two different drives, and both can achieve the purpose of driving the limiting member to move. Thus, the structure of the pot lid is greatly simplified, the cost is saved, and it is also helpful for the miniaturization of the pot lid volume.

[0023] 3. As a preferred embodiment of the present utility model, the pot lid assembly further includes a transmission member. The open lid button drives the push rod through the transmission member. The lid body is also provided with a float valve, which can float up and down under the action of air pressure. In the floating state of the float valve, the float valve is in stop cooperation with the transmission member to limit the movement of the transmission member. The open lid button acts on the push rod through the transmission member to drive the push rod to move. The float valve can float up and down with the rise and fall of the air pressure in the pot. When the air pressure in the pot is low, the float valve is in a sinking state. At this time, the float valve forms an avoidance for the transmission member, enabling the transmission member to move normally and then drive the push rod. When the air pressure in the pot rises to lift the float valve, the float valve is located on the movement path of the transmission member to form a stop limit for the transmission member, making the transmission member unable to move, and thus unable to drive the push rod. In this state, the user cannot press the open lid button, thereby realizing anti-opening under pressure, avoiding the pot lid being opened during pressure cooking due to the user's misoperation, reducing the risk of the pot lid being blown open by air pressure, and at the same time ensuring that the airtight environment in the pot is not damaged and ensuring the normal progress of pressure cooking.

[0024] 4. As a preferred embodiment of the present utility model, a pressing member is provided between the limiting member and the first pressure relief valve. The limiting member presses the first pressure relief valve through the pressing member. The cover body is further provided with a first elastic member, and the first elastic member pushes the limiting member to press down the pressing member. The downward pressure of the limiting member is provided by the first elastic member, so that the first pressure relief valve seals the first pressure relief port. Compared with the method of pressing by a heavy object, it can not only reduce the noise generated during the movement of the heavy object, and the first elastic member always moves in the up and down direction, and the force applied to the limiting member is always vertically downward, so that the pressure of the pressing member on the first pressure relief valve is more stable and reliable. At the same time, it can also simplify the structure of the pot lid assembly and save costs. In addition, the pressure limit is realized through the elastic force of the first elastic member, which is simpler and easier to achieve. When the air pressure in the pot is higher than the set value, the upward pushing force of the gas in the pot on the first pressure relief valve is greater than the elastic force of the first elastic member, so that the first pressure relief valve moves upward against the elastic force of the first elastic member, and then opens the first pressure relief port. At this time, the gas in the pot can be discharged through the first pressure relief port, thereby realizing high-pressure protection. When the air pressure in the pot returns below the set value, the pushing force of the gas on the first pressure relief valve is less than the elastic force of the first elastic member, and the first pressure relief valve sinks to seal the first pressure relief port again and continue pressure cooking.

[0025] 5. As a preferred embodiment of the present utility model, the second pressure relief valve has a sealing portion located below the cover body. The sealing portion includes a body and a sealing rib protruding upward. In the floating state of the second pressure relief valve, the sealing rib abuts against the lower surface of the cover body for sealing, and there is a gap between the body and the cover body. The sealing portion seals the second pressure relief port by the sealing rib abutting against the lower surface of the cover body. On the one hand, it ensures the sealing effect, and on the other hand, it reduces the contact area between the sealing portion and the cover body, so that there is a cavity between the two. Since the liquid in the pot boils violently during the cooking process and will reach the second pressure relief valve, the existence of the cavity can prevent the sealing portion and the cover body from being sucked together under the action of the liquid, or the viscous liquid from sticking the two together, resulting in the situation that the second pressure relief valve cannot sink. In this way, it is ensured that the second pressure relief valve can float up and down reliably, and thus its own function can be realized, and the problem of the second pressure relief valve malfunctioning can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0027] Figure 1 is a cross-sectional view of the cooking appliance in an initial stage under an embodiment of the present utility model;

[0028] Figure 2 is Figure 1 an enlarged view of area A in

[0029] Figure 3 Cross-sectional view of a cooking appliance in the upper pressing stage under an embodiment of the present utility model;

[0030] Figure 4 is Figure 3 an enlarged view of area B in

[0031] Figure 5 Cross-sectional view of a cooking appliance in the protection pressure relief stage under an embodiment of the present utility model;

[0032] Figure 6 is Figure 5 an enlarged view of area C in

[0033] Figure 7 Cross-sectional view of a cooking appliance in the pre-opening pressure relief stage under an embodiment of the present utility model;

[0034] Figure 8 is Figure 7 an enlarged view of area D in

[0035] Figure 9 Cross-sectional view of a cooking appliance in the opening stage under an embodiment of the present utility model;

[0036] Figure 10 is Figure 9 an enlarged view of area E in

[0037] Figure 11 Exploded view of the structure of a pot lid assembly under an embodiment of the present utility model;

[0038] Figure 12 Schematic diagram of the structure of an inner lid under an embodiment of the present utility model;

[0039] Figure 13 is Figure 12 the exploded view of the structure of the inner lid in

[0040] Figure 14 Schematic diagram of the structure of a lining lid under an embodiment of the present utility model, where the opening button is in an untriggered state;

[0041] Figure 15 Schematic diagram of the structure of a lining lid under an embodiment of the present utility model, where the opening button is in a triggered state.

[0042] Wherein:

[0043] 1 Cover body; 11 First pressure relief port; 111 First pressure relief valve; 12 Second pressure relief port; 121 Second pressure relief valve; 1211 Sealing part; 1212 Sealing rib; 13 Exhaust passage; 14 Pressing part; 141 Sealing element; 142 First elastic element; 15 Float valve; 151 Stopping part; 152 Sealing lip; 16 Pressure limiting valve; 161 Second elastic element; 162 Pressure limiting port; 17 Face cover; 18 Liner cover; 19 Inner cover;

[0044] 2 Open - cover button;

[0045] 3 Locking part;

[0046] 4 Transmission part; 41 Accommodating space;

[0047] 5 Solenoid valve; 51 Push rod;

[0048] 6 Limiting part;

[0049] 7 Pot body. Detailed implementation mode

[0050] In order to more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0051] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0052] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0053] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "embodiment", "example", "an embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0055] As Figure 1 , Figure 2 , Figure 9 , Figure 10 As shown, a pot lid assembly includes a lid body 1. The lid body 1 is provided with a first pressure relief port 11 and a second pressure relief port 12. A first pressure relief valve 111 is arranged at the first pressure relief port 11, and a second pressure relief valve 121 is arranged at the second pressure relief port 12. The first pressure relief valve 111 can sink to seal the first pressure relief port 11 or float up to open the first pressure relief port 11. The second pressure relief valve 121 can sink to open the second pressure relief port 12 or float up to seal the second pressure relief port 12. The lid body 1 is further provided with an open lid button 2 and a limiting member 6. The limiting member 6 acts on the first pressure relief valve 111 to keep the first pressure relief valve 111 in the state of sealing the first pressure relief port 11. The open lid button 2 can drive the limiting member 6 to move so that the limiting member 6 is disengaged from the first pressure relief valve 111.

[0056] Specifically, as Figure 11 shown, the lid body 1 includes a face cover 17, a lining cover 18 and an inner cover 19. The inner cover 19 is in direct contact with the internal environment of the pot. The first pressure relief port 11, the second pressure relief port 12, the first pressure relief valve 111 and the second pressure relief valve 121 are all arranged on the inner cover 19. The limiting member 6 is arranged on the lining cover 18. The face cover 17 is provided with an installation groove for installing the open lid button 2. Among them, the open lid button 2 can be arranged on the side of the pot lid assembly, and the user horizontally presses the open lid button 2 from one side of the pot lid assembly to open the lid, or it can be arranged on the top surface of the pot lid assembly, and the user presses the open lid button 2 downward from the top of the pot lid assembly to open the lid.

[0057] It can be understood that before pressure cooking, the pot lid assembly and the pot body 7 are first locked together to prevent the lid from being bounced open by the air pressure after the pressure in the pot rises. The open lid button 2 is used to control the unlocking of the locking mechanism on the pot lid assembly and the pot body 7. That is, after the user presses the open lid button 2, the lid and the pot body 7 are unlocked, and at this time the lid can be opened.

[0058] In the present utility model, the first pressure relief port 11 and the second pressure relief port 12 are both used for the passage of air flow. When opening the lid, whether the pressure inside the pot is a high-pressure environment or a negative-pressure environment, it can be regarded as a phenomenon of unbalanced air pressure inside and outside the pot. Therefore, the present utility model is collectively referred to as pressure relief. However, it is not difficult to understand that when the pressure inside the pot is high, the pressure relief process is for the gas to flow from inside the pot to the outside, and when the pressure inside the pot is negative, the pressure relief process is for the outside air to enter the pot.

[0059] In the present utility model, the lid is provided with a first pressure relief valve 111 and a second pressure relief valve 121. Among them, the sealing methods of the first pressure relief valve 111 and the second pressure relief valve 121 are different. When the first pressure relief valve 111 floats upward, it opens the first pressure relief port 11, and when it sinks, it seals the first pressure relief port 11. When the second pressure relief valve 121 floats upward, it seals the second pressure relief port 12, and when it sinks, it opens the second pressure relief port 12.

[0060] When the lid-opening button 2 is not pressed, the limiting member 6 acts on the first pressure relief valve 111 to keep the first pressure relief valve 111 in the state of sealing the first pressure relief port 11. As the air pressure inside the pot increases during cooking, the second pressure relief valve 121 moves upward under the push of the air pressure to seal the second pressure relief port 12. At this time, both the first pressure relief port 11 and the second pressure relief port 12 are sealed, and pressure cooking can be carried out. After cooking is completed and the pressure relief is finished, when the user presses the lid-opening button 2 to open the lid, the lid-opening button 2 synchronously drives the limiting member 6, causing the limiting member 6 to lose the limit on the first pressure relief valve 111. At this time, the first pressure relief valve 111 can freely float up and down. At this time, if the pressure inside the pot is a high-pressure environment, the gas inside the pot will push the first pressure relief valve 111 to float upward, thereby conducting the first pressure relief port 11. Similarly, the high pressure inside the pot will also push the second pressure relief valve 121 to float upward to seal the second pressure relief port 12. At this time, the gas inside the pot can be discharged through the first pressure relief port 11. If the pressure inside the pot is a negative-pressure environment, the second pressure relief valve 121 will be sucked downward under the action of the air pressure and thus be in the sinking position, conducting the second pressure relief port 12, and the outside air can enter the pot through the second pressure relief port 12 to balance the internal and external air pressures. And at this time, since the limiting member 6 loses the restriction on the first pressure relief valve 111, the first pressure relief valve 111 can also move up and down. Therefore, there is also a possibility that the first pressure relief valve 111 opens the first pressure relief port 11. At this time, both the first pressure relief port 11 and the second pressure relief port 12 are conducted, and the outside air can be communicated with the inside of the pot through the two places.

[0061] In this way, it is ensured that when opening the lid, at least one of the first pressure relief port 11 and the second pressure relief port 12 is in a conductive state, so that the inside and outside of the pot are communicated, thereby ensuring the balance of the internal and external air pressures of the pot, effectively solving the problems of high-pressure lid bursting and negative-pressure lid suction, reducing the risk and improving the convenience when opening the lid, enabling the user to quickly open the lid, and improving the use experience.

[0062] It should be noted that the movement mode of the limiting member 6 of the present utility model is not limited, and it includes but is not limited to the situations listed in the following embodiments:

[0063] Embodiment 1: In this embodiment, the limiting member 6 is slidably connected to the cover body 1 so that the limiting member 6 can move relative to the first pressure relief valve 111.

[0064] Specifically, in one embodiment, the limiting member 6 is disposed above the first pressure relief valve 111 and has a structure that can be driven to slide up and down by the opening cover button 2. When the limiting member 6 slides down to abut against the first pressure relief valve 111, a downward pressure is formed on the first pressure relief valve 111, so that the first pressure relief valve 111 tightly seals the first pressure relief port 11. When the limiting member 6 moves upward and disengages from the first pressure relief valve 111, a space for the first pressure relief valve 111 to move up and down is formed therebetween, and at this time, the first pressure relief valve 111 can float up and down.

[0065] In another embodiment, the limiting member 6 has a structure that can slide horizontally. When it moves horizontally above the first pressure relief valve 111, a downward pressure is formed on the first pressure relief valve 111 to limit the up and down movement of the first pressure relief valve 111. When the limiting member 6 moves horizontally to one side, an avoidance is formed for the first pressure relief valve 111, and at this time, the first pressure relief valve 111 can float up and down.

[0066] Embodiment 2: In this embodiment, as Figure 2 , Figure 11 , Figure 14 , Figure 15 shown, the limiting member 6 has a connecting portion rotatably connected to the cover body 1, as well as an induction end located at one end of the connecting portion and an acting end located at the other end of the connecting portion. The limiting member 6 can rotate around the connecting portion so that the acting end presses the first pressure relief valve 111 or disengages from the first pressure relief valve 111.

[0067] The limiting member 6 is an overall lever structure. When the induction end is stressed and sinks, the acting end will lift up and thus lose the pressing on the first pressure relief valve 111. When the induction end lifts up, the acting end sinks to form a pressing on the first pressure relief valve 111. By using the lever structure, the driving of the limiting member 6 can be made more labor-saving by setting the length of the force arm and the like, and the internal space of the pot lid assembly can be saved, which is helpful for miniaturization.

[0068] In a preferred embodiment, as Figures 1 to 11 , Figure 14 , Figure 15 shown, the pot lid assembly further includes a solenoid valve 5 disposed on the cover body 1. The solenoid valve 5 has a push rod 51. One end of the push rod 51 cooperates with the opening cover button 2, and the other end acts on the limiting member 6 to drive the limiting member 6 to move.

[0069] By cooperating the solenoid valve 5 with the limiting member 6, on the one hand, automatic pressure relief after cooking can be achieved. The action of the solenoid valve 5 is associated with the cooking program. After cooking is completed, the control unit is used to control the solenoid valve 5 to work automatically, driving the limiting member 6 to move to release the restriction on the first pressure relief valve 111, so that the first pressure relief valve 111 can float upward under the push of the gas in the pot to achieve exhaust pressure relief. On the other hand, the push rod 51 of the solenoid valve 5 is also associated with the lid opening button 2. When the user presses the lid opening button 2, the lid opening button 2 also acts on the push rod 51, manually triggering the solenoid valve 5 to work again and making the limiting member 6 move.

[0070] Therefore, the solenoid valve 5 is realized to have two control modes: electric control and manual control. And for the two modes, only the power sources applied to the push rod 51 are different, while the movement mode of the push rod 51 and the transmission mode to the limiting member 6 are the same. Therefore, the same set of transmission mechanism is used to achieve two different drives, and both can achieve the purpose of driving the limiting member 6 to move. This greatly simplifies the structure of the pot lid, saves costs, and also contributes to the miniaturization of the volume of the pot lid body 1.

[0071] Preferably, the solenoid valve 5 is electrically connected to the control unit to have an electric control state. In the electric control state, the push rod 51 reciprocates to intermittently drive the limiting member 6 to move. During automatic pressure relief, the action of the push rod 51 is a dot-like push, making the first pressure relief port 11 open intermittently, rather than directly opening completely for pressure relief, thereby avoiding too fast pressure relief and bad phenomena such as continuous boiling and overflow in the cooking cavity.

[0072] Furthermore, as Figures 3 to 6 、 Figures 7 to 10 、 Figure 14 、 Figure 15 shown, the pot lid assembly further includes a transmission member 4. The lid opening button 2 drives the push rod 51 through the transmission member 4. The lid body 1 is also provided with a float valve 15. The float valve 15 can float up and down under the action of air pressure. In the floating state of the float valve 15, the float valve 15 is in a stop fit with the transmission member 4 to limit the movement of the transmission member 4.

[0073] The open lid button 2 acts on the push rod 51 through the transmission member 4 to drive the movement of the push rod 51. The float valve 15 can float up and down with the change of the air pressure in the pot. When the air pressure in the pot is relatively low, the float valve 15 is in a sunken state. At this time, the float valve 15 forms an avoidance for the transmission member 4, enabling the transmission member 4 to move normally and then drive the push rod 51. When the air pressure in the pot rises to lift the float valve 15, the float valve 15 is located on the movement path of the transmission member 4 to stop and limit the transmission member 4, making the transmission member 4 unable to move, and thus unable to drive the push rod 51. In this state, the user cannot press the open lid button 2, thereby realizing anti-opening under pressure, avoiding the lid being opened midway during pressure cooking due to incorrect user operation, reducing the risk of the lid being blown open by the air pressure, and at the same time ensuring that the sealed environment inside the pot is not damaged and ensuring the normal progress of pressure cooking.

[0074] Specifically, as Figure 4 、 Figure 6 shown, the float valve 15 includes a sealing lip 152 and a stop portion 151 located above the sealing lip 152. The sealing lip 152 abuts against the inner lid 19 of the lid body 1 to enclose a sealed space communicating with the inside of the pot. The air pressure in the sealed space is the same as that in the pot. Therefore, the sealing lip 152 can expand or contract under the action of the air pressure difference. When the sealed space expands with the increase of the air pressure in the pot, the stop portion 151 is pushed upward and then protrudes above the upper surface of the lining cover 18 to stop the transmission member 4. When the air pressure in the sealed space decreases with the decrease of the air pressure in the pot, the stop portion 151 drops with the contraction of the sealing lip 152 to form an avoidance for the transmission member 4.

[0075] As Figure 8 、 Figure 10 shown, the solenoid valve 5 is horizontally arranged so that the push rod 51 can move horizontally. The limiting member 6 is rotatably connected to the lid body 1 to be able to swing up and down. The end thereof cooperating with the push rod 51 is provided with an inclined surface structure to convert the horizontal acting force of the push rod 51 into a downward acting force to drive the limiting member 6 to swing.

[0076] Furthermore, as Figure 11 、 Figure 14 、 Figure 15 shown, the transmission member 4 is also a horizontally moving structure, and the transmission member 4 has a receiving space 41. The solenoid valve 5 is arranged in the receiving space 41, but the solenoid valve 5 does not move with the transmission member 4. This enables the transmission member 4 to integrate the functions of transmission and accommodation of the solenoid valve 5, simplifies the internal installation structure of the lid assembly, optimizes the internal space layout of the lid assembly, and helps to reduce the overall thickness of the lid assembly.

[0077] Even further, as Figures 1 to 10 、 Figure 14 、 Figure 15As shown, a locking member 3 is further provided between the lid opening button 2 and the transmission member 4. The locking member 3 is rotatably connected to the lid body 1 and is used to lock with the pot body 7. When the user presses the lid opening button 2, the lid opening button 2 first drives the locking member 3 to move. While the locking member 3 is moving, the unlocking of the lid assembly and the pot body 7 is realized, and the triggering of the transmission member 4 is achieved, and through subsequent transmission, the limiting member 6 releases the restriction on the first pressure relief valve 111.

[0078] As a preferred embodiment of the present invention, as Figure 2 , Figure 4 , Figure 6 , Figure 8 , Figure 10 As shown, a pressing member 14 is provided between the limiting member 6 and the first pressure relief valve 111. The limiting member 6 presses the first pressure relief valve 111 through the pressing member 14. The lid body 1 is further provided with a first elastic member 142, and the first elastic member 142 pushes the limiting member 6 to press down the pressing member 14.

[0079] The downward pressure of the limiting member 6 is provided by the first elastic member 142, so that the first pressure relief valve 111 seals the first pressure relief port 11. Compared with the method of pressing down with a heavy object, it can not only reduce the noise generated during the movement of the heavy object, and the first elastic member 142 always moves in the up and down direction, and the force applied to the limiting member 6 is always vertically downward, so that the pressure of the pressing member 14 on the first pressure relief valve 111 is more stable and reliable. At the same time, it can also simplify the structure of the lid assembly and save costs. In addition, the pressure limit is realized through the elastic force of the first elastic member 142, which is more simple and easy to achieve. When the gas pressure in the pot is higher than the set value, the upward pushing force of the gas in the pot on the first pressure relief valve 111 is greater than the elastic force of the first elastic member 142, so that the first pressure relief valve 111 moves upward against the elastic force of the first elastic member 142, and then the first pressure relief port 11 is opened. At this time, the gas in the pot can be discharged through the first pressure relief port 11, so as to realize high-pressure protection. When the gas pressure in the pot returns below the set value, the pushing force of the gas on the first pressure relief valve 111 is less than the elastic force of the first elastic member 142, and the first pressure relief valve 111 sinks to seal the first pressure relief port 11 again and continues pressure cooking.

[0080] Specifically, as Figure 4 , Figure 6 As shown, a sealing member 141 is provided between the pressing member 14 and the first pressure relief valve 111. When the limiting member 6 presses down the pressing member 14 and the pressing member 14 sinks, the sealing member 141 undergoes tensile deformation and is sealed under the extrusion of the pressing member 14 and the first pressure relief valve 111. When the limiting member 6 loses the downward pressure on the pressing member 14, the pressing member 14 moves upward to reset under the action of the sealing member 141 and separates from the first pressure relief valve 111.

[0081] Preferably, as Figure 2As shown, the pot lid assembly is provided with an exhaust passage 13 that communicates the inside of the pot with the outside, and the second pressure relief port 12 is disposed in the exhaust passage 13; alternatively, the second pressure relief port 12 communicates with the exhaust passage 13.

[0082] The second pressure relief port 12 and the second pressure relief valve 121 communicate with the exhaust passage 13. Utilizing the structural feature that the second pressure relief valve 121 floats to seal and sinks to conduct, the second pressure relief valve 121 can be used as a reflux valve for the exhaust passage 13, enabling the liquid surging into the exhaust passage 13 to flow back into the pot through the second pressure relief port 12, rather than accumulating inside the pot lid assembly for a long time, ensuring the cleanliness of the exhaust passage 13.

[0083] To ensure complete liquid reflux in the exhaust passage 13, the second pressure relief port 12 needs to be set at the lowest end of the exhaust passage 13, which can be located on the bottom wall inside the exhaust passage 13 or below the exhaust passage 13.

[0084] In a preferred embodiment, as Figures 1 to 10 、 Figure 12 、 Figure 13 shown, the lid 1 is further provided with a pressure limiting port 162 and a pressure limiting valve 16 disposed at the pressure limiting port 162. A second elastic member 161 is provided at the pressure limiting valve 16 to cause the pressure limiting valve 16 to sink to seal the pressure limiting port 162. When the air pressure inside the pot is higher than the set value, pressure can be relieved simultaneously through the pressure limiting valve 16 and the first pressure relief valve 111, or when the first pressure relief valve 111 fails, pressure is relieved through the pressure limiting valve 16. The working principle of the pressure limiting valve 16 is as follows: when the upward pushing force of the gas inside the pot on the pressure limiting valve 16 is greater than the elastic force of the second elastic member 161, the pressure limiting valve 16 overcomes the elastic force of the second elastic member 161 and moves upward, thereby opening the pressure limiting port 162. At this time, the gas inside the pot can be discharged through the pressure limiting port 162, thus achieving high-pressure protection. When the air pressure inside the pot returns below the set value, the pushing force of the gas on the pressure limiting valve 16 is less than the elastic force of the second elastic member 161, and the pressure limiting valve 16 sinks to reseal the pressure limiting port 162 and continues pressure cooking.

[0085] Preferably, both the first elastic member 142 and the second elastic member 161 are springs.

[0086] As Figure 2 shown, both the first pressure relief valve 111 and the pressure limiting valve 16 are located on one side of the exhaust passage 13, and both exhaust through a horizontal opening, so as to achieve the anti-overflow effect during the exhaust process, change the flow direction of the upward surging gas, lengthen the airflow path, weaken the airflow kinetic energy, enable the liquid to separate from the gas under the action of gravity and flow back, and reduce the risk of overflowing the pot.

[0087] As a preferred embodiment of the present invention, as Figure 2 、 Figure 4As shown, the second pressure relief valve 121 has a sealing portion 1211 located below the cover body 1, and the sealing portion 1211 includes a main body and a sealing rib 1212 protruding upward. When the second pressure relief valve 121 is in a floating state, the sealing rib 1212 abuts against and seals the lower surface of the cover body 1, and there is a gap between the main body and the cover body 1.

[0088] The sealing part 1211 is in contact with the lower surface of the cover body 1 through the sealing rib 1212 to seal the second pressure relief port 12, which ensures the sealing effect on the one hand, and reduces the contact area between the sealing part 1211 and the cover body 1 on the other hand, so that there is a cavity between the two. Since the liquid in the pot boils violently during cooking, it will reach the second pressure relief valve 121. Therefore, the existence of the cavity can prevent the sealing part 1211 and the cover body 1 from being sucked together under the action of the liquid, or the viscous liquid will stick the two together, resulting in the second pressure relief valve 121 being unable to sink. In this way, it is ensured that the second pressure relief valve 121 can float up and down reliably, thereby realizing its own function and avoiding the problem of the second pressure relief valve 121 function failure.

[0089] The following describes the status of each valve body on the pot cover assembly of the utility model according to different stages of cooking:

[0090] Initial stage (cooking without pressure): Figure 1 , Figure 2 As shown, the solenoid valve 5 is in a normally open state, the push rod 51 is in an initial position, and the cover opening button 2 is not triggered; the float valve 15 is in an initial position under the action of gravity, and the top is lower than the upper surface of the lining cover 18 to avoid the transmission member 4; the limit member 6, under the action of the first elastic member 142, causes the pressing member 14 to press the first pressure relief valve 111 to seal the first pressure relief port 11; the second pressure relief valve 121 droops under the action of its own gravity, and the second pressure relief port 12 is connected, so that the cooking cavity is connected to the atmosphere through the second pressure relief port 12, and the cover suction problem will not occur.

[0091] Pressure stage: Figure 3 , Figure 4 As shown, after a pressure difference is generated between the cooking cavity and the outside atmosphere, the pressure in the pot pushes the float valve 15 upward, and the float valve 15 and the transmission member 4 form a stopper to prevent the user from accidentally opening the lid when there is pressure inside; at the same time, the pressure pushes the second pressure relief valve 121 upward to seal the second pressure relief port 12, forming a closed space in the pot, and the cooking cavity is successfully pressurized.

[0092] Protect the pressure relief stage (if necessary): Figure 5 , Figure 6As shown, when the actual pressure inside the pot is greater than the set pressure, the internal pressure pushes the first pressure relief valve 111 to overcome the elastic force of the first elastic member 142, and the first pressure relief valve 111 moves upward, causing the first pressure relief port 11 to conduct, and discharging the excess pressure inside the pot. When the first pressure relief valve 111 fails and the pressure inside the product is too high, exceeding the protection pressure of the pressure limiting valve 16, the internal pressure pushes the pressure limiting valve 16 to move upward against the elastic force of the second elastic member 161, discharging the pressure inside the cooking cavity and avoiding the risk of continuous pressure increase.

[0093] Pre-pressure relief stage before opening the lid: As Figure 7 , Figure 8 shown, after the pressure cooking is completed, the control unit controls the push rod 51 of the solenoid valve 5 to act, which pushes the limiting member 6 to move, compressing the first elastic member 142 upward. The first pressure relief valve 111 moves upward under the internal pressure of the cooking cavity, causing the first pressure relief port 11 to conduct, and discharging the pressure inside the pot intermittently multiple times, achieving the effect of pre-pressure relief before opening the lid.

[0094] Lid opening stage: As Figure 9 , Figure 10 shown, after the pressure relief is completed, the second pressure relief valve 121 sinks under the action of gravity, causing the second pressure relief port 12 to conduct, so that there is no phenomenon of lid suction during the lid opening process; at the same time, the float valve 15 sinks under the action of gravity to make way for the transmission member 4; the user operates the lid opening button 2 to push the transmission member 4, and the transmission member 4 drives the push rod 51 of the solenoid valve 5 to extend, and further drives the limiting member 6 to move to release the restriction on the first pressure relief valve 111. At the same time, the locking member 3 moves to realize the disconnection of the lid assembly and the pot body 7.

[0095] As Figure 1 shown, the present utility model also discloses a cooking appliance, including a pot body 7 having a cooking cavity, and further including the above-mentioned lid assembly; the first pressure relief port 11 and the second pressure relief port 12 communicate with the cooking cavity, and the lid assembly is further provided with a locking member 3 for locking with the pot body 7, and the lid opening button 2 can drive the locking member 3 to move so as to unlock the lid assembly from the pot body 7.

[0096] In the present utility model, one end of the lid assembly is rotatably connected to the pot body 7, and the other end is provided with a lid opening button 2 and a locking member 3 to lock the lid with the pot body 7. The lid can be turned up and down around the connection to realize lid opening and lid closing. When opening the lid, the user presses the lid opening button 2 to unlock the locking member 3 from the pot body 7, and at this time, the lid can be rotated to open.

[0097] It should be noted that the present utility model does not limit the type of the cooking appliance, which can be a high-pressure cooking appliance, such as a pressure cooker, etc., or a micro-pressure cooking appliance, such as a micro-pressure rice cooker, etc., as long as it can cook in a manner higher than the standard atmospheric pressure.

[0098] In the present utility model, the parts not described can be realized by adopting or referring to the existing technologies.

[0099] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key points of each embodiment are the differences from other embodiments.

[0100] The above description is only for the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A lid assembly, comprising a lid body, the lid body is provided with a first pressure relief port and a second pressure relief port, a first pressure relief valve is arranged at the first pressure relief port, a second pressure relief valve is arranged at the second pressure relief port, the first pressure relief valve can sink to seal the first pressure relief port or float up to open the first pressure relief port, the second pressure relief valve can sink to open the second pressure relief port or float up to seal the second pressure relief port, and it is characterized in that, the lid body is further provided with an opening button and a limiting member, the limiting member acts on the first pressure relief valve to keep the first pressure relief valve in a state of sealing the first pressure relief port, and the opening button can drive the limiting member to move so that the limiting member disengages from the first pressure relief valve.

2. The lid assembly according to claim 1, characterized in that, the limiting member is slidably connected to the lid body so that the limiting member can move relative to the first pressure relief valve; or, the limiting member has a connecting portion rotatably connected to the lid body, a sensing end at one end of the connecting portion and an acting end at the other end of the connecting portion, and the limiting member can rotate around the connecting portion so that the acting end presses the first pressure relief valve or disengages from the first pressure relief valve.

3. The lid assembly according to claim 1, characterized in that, the lid assembly further comprises an electromagnetic valve arranged on the lid body, the electromagnetic valve has a push rod, one end of the push rod cooperates with the opening button, and the other end acts on the limiting member to drive the limiting member to move.

4. The lid assembly according to claim 3, characterized in that, the lid assembly further comprises a transmission member, the opening button drives the push rod through the transmission member, the lid body is further provided with a float valve, the float valve can float up and down under the action of air pressure, and when the float valve is in the floating state, the float valve is in a stop fit with the transmission member to limit the movement of the transmission member.

5. The lid assembly according to claim 3, characterized in that, the electromagnetic valve is electrically connected to a control unit to have an electric control state, and in the electric control state, the push rod reciprocates to intermittently drive the limiting member to move.

6. The lid assembly according to claim 1, characterized in that, a pressing member is arranged between the limiting member and the first pressure relief valve, the limiting member presses the first pressure relief valve through the pressing member, and the lid body is further provided with a first elastic member, and the first elastic member pushes the limiting member to press down the pressing member.

7. The lid assembly according to claim 1, characterized in that, the lid assembly is provided with an exhaust passage communicating the inside of the pot with the outside, and the second pressure relief port is arranged in the exhaust passage; or, the second pressure relief port communicates with the exhaust passage.

8. The lid assembly according to claim 1, characterized in that, the lid body is further provided with a pressure limiting port and a pressure limiting valve arranged at the pressure limiting port, and a second elastic member is arranged at the pressure limiting valve so that the pressure limiting valve sinks to seal the pressure limiting port.

9. The lid assembly according to claim 1, characterized in that, The second pressure relief valve has a sealing portion located below the cover body. The sealing portion includes a body and a sealing rib protruding upward. When the second pressure relief valve is in a floating state, the sealing rib abuts against and seals the lower surface of the cover body, and there is a gap between the body and the cover body.

10. A cooking appliance, comprising a pot body having a cooking cavity, characterized in that it further includes the lid assembly according to any one of claims 1-9; the first pressure relief port and the second pressure relief port communicate with the cooking cavity, and the lid assembly is further provided with a locking member for locking with the pot body, and the opening button can drive the locking member to move so that the lid assembly is unlocked from the pot body.

Images