Safety valve, pot cover assembly and pressure cooking utensil

Abstract

The utility model discloses a safety valve, pot lid subassembly and pressure cooking utensil relates to life electric appliance technical field, the safety valve includes valve body, first switch subassembly and push piece, the valve body is provided with air inlet, exhaust port and intercommunication air inlet and exhaust port's airflow channel, the airflow channel is provided with blocking portion, the first switch subassembly is provided with the first switch subassembly, and the push piece is provided with the second switch subassembly. The valve body is further provided with a first ventilation opening, a second ventilation opening and a containing cavity communicated with the first ventilation opening and the second ventilation opening, and the first ventilation opening and the second ventilation opening are correspondingly communicated with the air inlet channel and the exhaust channel. The first switch valve assembly comprises a first valve element, a sealing piece and a first elastic piece. According to the technical scheme provided by the utility model, the first elastic piece cannot be in contact with air transmitted from the air inlet channel, namely, the possibility of being in contact with cooking food materials is very small, so that the use stability and the service life are favorably ensured.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a safety valve, a pot lid assembly, and a pressure cooking appliance. Background Technology

[0002] With societal progress, people have higher demands for cooking, making pressure cooking a trend. Pressure cooking can more effectively preserve the nutritional value of food, shorten cooking time, lower food temperature, and protect the delicate texture and flavor of food. In addition, pressure cookers can save costs and reduce energy consumption.

[0003] In pressure cooking appliances, the safety relief valve is a crucial safety device used to release steam when the pressure inside the pot becomes too high, preventing explosions. However, in some related technologies, the return spring of the safety relief valve is connected to the steam passage, causing the cooking food to remain in prolonged contact with the spring, affecting the valve's stability and lifespan. Utility Model Content

[0004] The main purpose of this utility model is to propose a safety valve, a pot lid assembly, and a pressure cooking appliance, aiming to at least solve the technical problem in related technologies where the return spring of the safety pressure relief valve is connected to the steam passage, causing the cooking food and other items to be in long-term contact with the spring, affecting the stability and lifespan of the valve.

[0005] To achieve the above objectives, this utility model proposes a safety valve, comprising:

[0006] The valve body is provided with an air inlet, an air outlet, and an airflow channel connecting the air inlet and the air outlet. The airflow channel is provided with a blocking part to divide the airflow channel into an air inlet channel communicating with the air inlet and an air outlet channel communicating with the air outlet. The valve body is also provided with a first vent, a second vent, and a receiving cavity connecting the first vent and the second vent. The first vent and the second vent are respectively connected to the air inlet channel and the air outlet channel.

[0007] A first switching valve assembly includes a first valve core, a seal, and a first elastic element. One end of the first valve core is movably disposed within the receiving cavity, and its movement includes a blocking position for sealing the first vent and a depressurizing position for releasing the seal. The seal is disposed between the first valve core and the side wall of the receiving cavity to divide the receiving cavity into a first chamber near the airflow channel and a second chamber away from the airflow channel. The first chamber communicates with both the first and second vents. The first elastic element is disposed outside the first chamber to provide a driving force for the first valve core to move toward the blocking position.

[0008] A pusher is driven and connected to the first valve core to push the first valve core toward the pressure relief position.

[0009] In one embodiment, the seal includes a resilient sealing gasket, the resilient sealing gasket comprising:

[0010] The main body is disposed at one end of the first valve core facing the airflow channel; and,

[0011] An elastic deformation portion is arranged in a ring shape, and the elastic deformation portion is disposed on the outer periphery of the main body and is fixedly connected to the side wall of the receiving cavity;

[0012] Specifically, when in the blocked position, the main body blocks the first vent. When the first valve core moves toward the pressure relief position, the main body moves with the first valve core to release the blockage of the first vent.

[0013] In one embodiment, the end of the receiving cavity away from the airflow channel is open, and an annular mounting groove is provided on the side wall of the opening of the receiving cavity;

[0014] The edge of the elastically deformable portion is disposed within the annular mounting groove;

[0015] The safety valve also includes a valve cover that covers the opening of the receiving cavity and presses against the edge of the elastically deformable portion.

[0016] In one embodiment, the valve body is further provided with a third vent that connects the air intake channel to the outside.

[0017] The safety valve further includes a second switching valve assembly, which includes a second valve core and a second elastic element disposed between the second valve core and the valve body. The second elastic element provides the driving force for the second valve core to normally close the third vent. When the pressure in the air intake channel is greater than the preset limit pressure, the second valve core opens the third vent.

[0018] This utility model also proposes a pot lid assembly, the pot lid assembly including a safety valve, the safety valve comprising:

[0019] The valve body is provided with an air inlet, an air outlet, and an airflow channel connecting the air inlet and the air outlet. The airflow channel is provided with a blocking part to divide the airflow channel into an air inlet channel communicating with the air inlet and an air outlet channel communicating with the air outlet. The valve body is also provided with a first vent, a second vent, and a receiving cavity connecting the first vent and the second vent. The first vent and the second vent are respectively connected to the air inlet channel and the air outlet channel.

[0020] A first switching valve assembly includes a first valve core, a seal, and a first elastic element. One end of the first valve core is movably disposed within the receiving cavity, and its movement includes a blocking position for sealing the first vent and a depressurizing position for releasing the seal. The seal is disposed between the first valve core and the side wall of the receiving cavity to divide the receiving cavity into a first chamber near the airflow channel and a second chamber away from the airflow channel. The first chamber communicates with both the first and second vents. The first elastic element is disposed outside the first chamber to provide a driving force for the first valve core to move toward the blocking position.

[0021] A pusher is driven and connected to the first valve core to push the first valve core toward the pressure relief position.

[0022] In one embodiment, the pot lid assembly further includes:

[0023] Cover;

[0024] A latch is movably disposed on the lid, having a locking position for locking with the pot body of the pressure cooking appliance and an unlocking position for releasing the pot body during its movement.

[0025] The unlocking structure includes an unlocking member movably disposed on the cover body. The unlocking member has an initial position, and the movement of the unlocking member includes a first movement and a second movement that proceed sequentially in the same direction from the initial position. During the first movement, the unlocking member can drive the pusher to move, thereby pushing the first valve core toward the pressure relief position. During the second movement, the unlocking member drives the latch to move from the locked position to the unlocked position.

[0026] The safety valve is located on the cover.

[0027] In one embodiment, the unlocking element is rotatably mounted on the cover.

[0028] In one embodiment, the unlocking structure further includes a lever, one end of which is tractively connected to the latch, and the other end of which is tractively connected to the unlocking member at least during the second active stroke of the unlocking member, so as to drive the latch to move from the locked position to the unlocked position during the second active stroke of the unlocking member.

[0029] In one embodiment, the lever and the unlocking element are rotatably configured relative to each other;

[0030] An anti-rotation structure is provided between the lever and the unlocking component, and the anti-rotation structure has a rotating state and an anti-rotation state.

[0031] When the unlocking element has a first active stroke, the anti-rotation structure is in the rotating state, and the lever and the unlocking element can rotate relative to each other. When the unlocking element has a second active stroke, the anti-rotation structure is in the anti-rotation state, restricting the relative rotation of the lever and the unlocking element.

[0032] In one embodiment, the anti-rotation structure includes a stop portion and a mating portion. When the unlocking member is in the first active stroke, the stop portion and the mating portion are spaced apart. When the unlocking member is at the end of the first active stroke, the stop portion and the mating portion abut against each other, so that the unlocking member drives the lever to rotate.

[0033] In one embodiment, one of the unlocking member and the lever is provided with a limiting protrusion, and the other is provided with an annular groove. The limiting protrusion and the annular groove cooperate, the cooperating part includes the limiting protrusion, and one end wall of the annular groove is the stop part.

[0034] In one embodiment, the pushing member is radially movable along the unlocking member;

[0035] The unlocking member has a protruding compression protrusion on its periphery, which compresses the pushing member during the first active stroke of the unlocking member.

[0036] In one embodiment, during the second active stroke of the unlocking member, the pressing protrusion maintains pressure on the pushing member.

[0037] In one embodiment, a reset member is provided between the cover and the unlocking member to reset the unlocking member to its initial position.

[0038] This utility model also proposes a pressure cooking appliance, including the aforementioned pot lid assembly.

[0039] In the technical solution of this utility model, the safety valve includes a valve body, a first switching assembly, and a pusher. The valve body is provided with an air inlet, an air outlet, and an airflow channel connecting the air inlet and the air outlet. A blocking part is provided within the airflow channel to divide the airflow channel into an air inlet channel communicating with the air inlet and an air outlet channel communicating with the air outlet. The valve body is also provided with a first vent, a second vent, and a receiving cavity connecting the first vent and the second vent. The first vent and the second vent are respectively connected to the air inlet channel and the air outlet channel. The first switching valve assembly includes a first valve core, a sealing element, and a first elastic element. One end of the first valve core is movably disposed within the receiving cavity, and its movement stroke has a blocking position for blocking the first vent and a pressure relief position for releasing the blockage. The sealing element is disposed between the first valve core and the side wall of the receiving cavity to divide the receiving cavity into a first chamber close to the airflow channel and a second chamber away from the airflow channel. The first chamber communicates with the first vent and the second vent. The first elastic element is disposed outside the first chamber to provide a driving force for the first valve core to move toward the blocking position. The pushing element is drivenly connected to the first valve core to push the first valve core to move toward the pressure relief position. With this configuration, when the air pressure in the intake channel is high and needs to be released, the pusher moves the first valve core towards the pressure release position, causing the first valve core to release the blockage of the first vent. Air in the intake channel can then enter the receiving cavity through the first vent, and then enter the exhaust channel through the second vent, before being discharged from the exhaust port, thus completing the pressure release. Since the sealing element is located between the first valve core and the side wall of the receiving cavity, dividing the receiving cavity into a first chamber close to the airflow channel and a second chamber away from the airflow channel, the air in the intake channel will only enter the first chamber after entering the receiving cavity. Thus, the first elastic element located outside the first chamber will not come into contact with the air from the intake channel, meaning the possibility of contact with cooking ingredients is very small, which helps to ensure the stability and lifespan of the product. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 A schematic diagram of the structure of an embodiment of the safety valve provided by this utility model;

[0042] Figure 2 for Figure 1 A schematic diagram of the structure of the safety valve in the pressure relief position;

[0043] Figure 3 A schematic diagram of the structure of an embodiment of the pot lid assembly provided by this utility model;

[0044] Figure 4 for Figure 3 A schematic diagram of the structure of the safety valve of the middle pot lid assembly in the pressure relief position;

[0045] Figure 5 for Figure 3 A three-dimensional structural diagram of the middle pot lid assembly;

[0046] Figure 6 for Figure 3 A three-dimensional structural diagram of the unlocking mechanism;

[0047] Figure 7 for Figure 6 A three-dimensional exploded view of the unlocking structure.

[0048] Explanation of icon numbers:

[0049] 1000, Pot lid assembly;

[0050] 100. Safety valve; 1. Valve body; 11. Air inlet; 12. Air outlet; 13. Airflow passage; 131. Air inlet passage; 132. Air outlet passage; 14. First vent; 15. Second vent; 16. Receiving cavity; 161. First chamber; 162. Second chamber; 163. Annular mounting groove; 17. Third vent; 2. First switch valve assembly; 21. First valve core; 22. Seal; 221. Main body; 222. Elastic deformation part; 23. First elastic element; 3. Pushing element; 4. Valve cover; 5. Second switch valve assembly; 51. Second valve core; 52. Second elastic element;

[0051] 6. Cover; 7. Lock; 8. Unlocking structure; 81. Unlocking component; 811. Pressing protrusion; 82. Lever; 83. Anti-rotation structure; 831. Stop; 832. Fitting part; 9. Reset component.

[0052] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0054] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0055] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0056] With societal progress, people have higher demands for cooking, making pressure cooking a trend. Pressure cooking can more effectively preserve the nutritional value of food, shorten cooking time, lower food temperature, and protect the delicate texture and flavor of food. In addition, pressure cookers can save costs and reduce energy consumption.

[0057] In pressure cooking appliances, the safety relief valve is a crucial safety device used to release steam when the pressure inside the pot becomes too high, preventing explosions. However, in some related technologies, the return spring of the safety relief valve is connected to the steam passage, causing the cooking food to remain in prolonged contact with the spring, affecting the valve's stability and lifespan.

[0058] The main purpose of this utility model is to propose a safety valve, a pot lid assembly, and a pressure cooking appliance, aiming to at least solve the technical problem in related technologies where the return spring of the safety pressure relief valve is connected to the steam passage, causing the cooking food and other items to be in long-term contact with the spring, affecting the stability and lifespan of the valve.

[0059] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the safety valve 100 includes a valve body 1, a first switching assembly, and a pusher 3. The valve body 1 is provided with an air inlet 11, an air outlet 12, and an airflow channel 13 connecting the air inlet 11 and the air outlet 12. The airflow channel 13 is provided with a blocking part to divide the airflow channel 13 into an air inlet channel 131 communicating with the air inlet 11 and an air outlet channel 132 communicating with the air outlet 12. The valve body 1 is also provided with a first vent 14, a second vent 15, and a receiving cavity 16 connecting the first vent 14 and the second vent 15. The first vent 14 and the second vent 15 are respectively connected to the air inlet channel 131 and the air outlet channel 132. The first switching valve assembly 2 includes a first valve core 21, a seal 22, and a first... The elastic element 23 is provided, with one end of the first valve core 21 movably disposed within the receiving cavity 16. During its movement, it has a blocking position for sealing the first vent 14 and a pressure-relieving position for releasing the blockage. The sealing element 22 is disposed between the first valve core 21 and the side wall of the receiving cavity 16 to divide the receiving cavity 16 into a first chamber 161 near the airflow channel 13 and a second chamber 162 away from the airflow channel 13. The first chamber 161 communicates with the first vent 14 and the second vent 15. The first elastic element 23 is disposed outside the first chamber 161 to provide a driving force for the first valve core 21 to move toward the blocking position. The pushing element 3 is drivenly connected to the first valve core 21 to push the first valve core 21 toward the pressure-relieving position.

[0060] In the technical solution of this utility model, the safety valve 100 includes a valve body 1, a first switching assembly, and a pusher 3. The valve body 1 is provided with an air inlet 11, an air outlet 12, and an airflow channel 13 connecting the air inlet 11 and the air outlet 12. The airflow channel 13 is provided with a blocking part to divide the airflow channel 13 into an air inlet channel 131 communicating with the air inlet 11 and an air outlet channel 132 communicating with the air outlet 12. The valve body 1 is also provided with a first vent 14, a second vent 15, and a receiving cavity 16 connecting the first vent 14 and the second vent 15. The first vent 14 and the second vent 15 are respectively connected to the air inlet channel 131 and the air outlet channel 132. The first switching valve assembly 2 includes a first valve core 21, a sealing element 22, and a first... The elastic element 23 is provided, with one end of the first valve core 21 movably disposed within the receiving cavity 16. During its movement, it has a blocking position for sealing the first vent 14 and a pressure-relieving position for releasing the blockage. The sealing element 22 is disposed between the first valve core 21 and the side wall of the receiving cavity 16 to divide the receiving cavity 16 into a first chamber 161 near the airflow channel 13 and a second chamber 162 away from the airflow channel 13. The first chamber 161 communicates with the first vent 14 and the second vent 15. The first elastic element 23 is disposed outside the first chamber 161 to provide a driving force for the first valve core 21 to move toward the blocking position. The pushing element 3 is drivenly connected to the first valve core 21 to push the first valve core 21 toward the pressure-relieving position. With this configuration, when the air pressure in the intake channel 131 is high and needs to be released, the pusher 3 pushes the first valve core 21 toward the pressure release position, causing the first valve core 21 to release the blockage of the first vent 14. The air in the intake channel 131 can then enter the receiving cavity 16 through the first vent 14, and then enter the exhaust channel 132 through the second vent 15, and finally be discharged from the exhaust port 12, thus completing the pressure release. Since the sealing member 22 is located between the first valve core 21 and the side wall of the receiving cavity 16, the receiving cavity 16 is divided into a first chamber 161 close to the airflow channel 13 and a second chamber 162 away from the airflow channel 13. After the air in the intake channel 131 enters the receiving cavity 16, it will only enter the first chamber 161. Thus, the first elastic member 23 located outside the first chamber 161 will not come into contact with the air from the intake channel 131, that is, the possibility of contact with cooking ingredients is very small, which helps to ensure the stability and lifespan of use.

[0061] It should be noted that the first valve core 21 does not only move to the pressure relief position under the action of the pushing member 3; when the air pressure in the intake channel 131 is relatively high, it will also overcome the elastic force of the first elastic member 23 and push the first valve core 21 to the pressure relief position, so that the gas in the intake channel 131 can be discharged through the exhaust channel 132. When the air pressure in the intake channel 131 returns to a relatively low level, under the elastic action of the first elastic member 23, the first valve core 21 will move to the blocking position to block the first vent 14, so that the gas in the intake channel 131 will not be discharged.

[0062] The function of the sealing element 22 is to divide the receiving cavity 16 into a part that communicates with the first vent 14 and a part that does not communicate with the first vent 14, thereby reducing the possibility that the gas in the air intake channel 131 will enter the receiving cavity 16 through the first vent 14 and come into contact with the elastic element.

[0063] The elastic seal 22 can take various forms. In some embodiments, the elastic seal 22 can be a sliding sealing ring disposed between the first valve core 21 and the side wall of the receiving cavity 16, which isolates the air in the air intake channel 131 by means of sliding seal. It is understood that the air pressure in the air intake channel 131 is usually higher than atmospheric pressure, so the seal 22 is often in a high-pressure environment. When the elastic seal 22 is in the form of a sliding sealing ring, the high-pressure environment can easily cause the sliding seal to fail.

[0064] Therefore, in the embodiments of this utility model, please refer to Figure 1 and Figure 2The sealing element 22 includes an elastic sealing gasket, which includes a main body 221 and an elastic deformation portion 222. The main body 221 is disposed at one end of the first valve core 21 facing the airflow channel 13. The elastic deformation portion 222 is annularly arranged and disposed on the outer periphery of the main body 221, and is fixedly connected to the side wall of the receiving cavity 16. In the blocked position, the main body 221 blocks the first vent 14. When the first valve core 21 moves toward the pressure relief position, the main body 221 moves with the first valve core 21 to release the blockage of the first vent 14. With this configuration, when the pusher 3 moves the first valve core 21 toward the pressure relief position, it will cause the main body 221 to move together, allowing the first vent 14 to connect the first chamber 161 and the air intake channel 131, thereby discharging the high-pressure gas in the air intake channel 131. During this process, the elastic deformation part 222 will deform to adapt to the movement of the main body 221. The elastic deformation part 222 is fixedly connected to the side wall of the receiving cavity 16, making it less prone to sealing failure. When the pusher 3 cancels the drive of the first valve core 21, the first valve core 21 will move to the blocking position under the action of the first elastic member 23. At this time, the first vent 14 is blocked by the main body 221, rather than just by the first valve core 21, resulting in a better sealing effect.

[0065] In order for the main body 221 to move in tandem with the first valve core 21 when the first valve core 21 moves toward the pressure relief position, in some embodiments, the main body 221 can be moved by the elastic force of the elastic deformation part 222. In some embodiments, the main body 221 can be fixed to the first valve core 21. In some embodiments, it can be achieved by both the elastic force of the elastic deformation part 222 and the fixing of the main body 221 and the first valve core 21.

[0066] There are various ways to fix the first valve core 21 and the main body 221. For some embodiments, please refer to... Figure 1 and Figure 2The first valve core 21 and the main body 221 can be snap-fitted together. The main body 221 is made relatively thick so that there is enough thickness to set the snap-fit ​​structure between the first valve core 21 and the main body 221. Since the main body 221 is in a high-temperature environment, this snap-fit ​​method is more stable. In some embodiments, the first valve core 21 and the main body 221 can also be bonded together. Of course, since the main body 221 needs to be in contact with a high-temperature environment, the adhesive used in the bonding process is preferably a high-temperature resistant adhesive.

[0067] In order to fix the elastic deformable part 222 to the side wall of the receiving cavity 16, in this embodiment of the present invention, the end of the receiving cavity 16 away from the airflow channel 13 is open, and the side wall at the opening of the receiving cavity 16 is provided with an annular mounting groove 163; the edge of the elastic deformable part 222 is disposed in the annular mounting groove 163; the safety valve 100 also includes a valve cover 4, which covers the opening of the receiving cavity 16 and presses the edge of the elastic deformable part 222. Thus, when fixing the elastic deformable part 222, the elastic deformable part 222 is positioned by the annular mounting groove 163 of the receiving cavity 16. After positioning, the opening of the receiving cavity 16 can be covered by the valve cover 4, and at the same time, the valve cover 4 presses the edge of the elastic deformable part 222, thereby fixing the elastic deformable part 222 to the side wall of the receiving cavity 16. Of course, the method of fixing the elastic deformation part 222 to the side wall of the receiving cavity 16 is not limited to this. In some embodiments, the edge of the elastic deformation part 222 can also be bonded to the side wall of the receiving cavity 16 by high-temperature resistant adhesive.

[0068] Pressure cooking appliances may experience abnormal internal air pressure during use. If, during prolonged use, the first vent 14 and the second vent 15 become blocked, preventing timely air release and potentially causing a safety hazard. To improve the safety performance of the safety valve 100, in this embodiment of the invention, the valve body 1 is further provided with a third vent 17 connecting the air intake channel 131 to the outside. The safety valve 100 also includes a second switching valve assembly 5, which includes a second valve core 51 and a second elastic element 52 disposed between the second valve core 51 and the valve body 1. The second elastic element 52 provides the driving force for the second valve core 51 to normally close the third vent 17. When the pressure within the air intake channel 131 exceeds a preset limit pressure, the second valve core 51 opens the third vent 17. With this configuration, under the action of the second elastic element 52, the third vent 17 remains normally closed, and the air in the air intake channel 131 will not pass through the third vent 17. That is, the third vent 17 is not prone to blockage. When the pressure cooking appliance experiences an abnormal internal air pressure during use, and exceeds the preset limit pressure, the air pressure will overcome the elasticity of the second elastic element 52 and push open the second valve core 51, allowing the air in the air intake channel 131 to be discharged to atmospheric pressure through the third vent 17, thereby improving the overall structural safety performance.

[0069] Wherein, the elastic force provided by the second elastic element 52 to the second valve core 51 is greater than the elastic force provided by the first elastic element 23 to the first valve core 21. Thus, under normal conditions, the gas in the air intake channel 131 will preferentially push open the first valve core 21, so that the gas is discharged from the first vent 14 and the second vent 15, without passing through the third vent 17. Only when the gas pressure in the air intake channel 131 reaches the preset limit pressure will the elastic force of the second elastic element 52 be overcome, and the second valve core 51 be pushed open, so that the gas is discharged to the outside from the third vent 17.

[0070] Please continue to refer to this. Figures 3 to 7 This utility model also proposes a pot lid assembly 1000 for use in a pressure cooking appliance. The pot lid assembly 1000 includes a safety valve 100. The specific structure of the safety valve 100 is as described in the above embodiments. Since this pot lid assembly 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0071] In the technical solution of this utility model, when the air pressure in the air intake channel 131 is high and needs to be released, the pusher 3 pushes the first valve core 21 to move toward the pressure release position, so that the first valve core 21 releases the blockage of the first vent 14. The air in the air intake channel 131 can then enter the receiving cavity 16 through the first vent 14, and then enter the exhaust channel 132 through the second vent 15, and then be discharged from the exhaust port 12, thereby completing the pressure release. Since the sealing member 22 is disposed between the first valve core 21 and the side wall of the receiving cavity 16, the receiving cavity 16 is divided into a first chamber 161 close to the airflow channel 13 and a second chamber 162 away from the airflow channel 13. After the air in the air intake channel 131 enters the receiving cavity 16, it will only enter the first chamber 161. In this way, the first elastic member 23 disposed outside the first chamber 161 will not come into contact with the air from the air intake channel 131, that is, the possibility of contact with cooking ingredients is very small, which is conducive to ensuring the stability and life of use.

[0072] It is understandable that after the pressure cooker is depressurized, the internal pressure will still be stronger than atmospheric pressure, but not enough to automatically open the first valve core 21. Therefore, opening the lid assembly 1000 at this time still poses a risk of burns. To reduce the risk of burns from high-pressure steam after opening the lid assembly 1000, please refer to the following embodiments of this utility model. Figure 3 , Figure 4 and Figure 5The lid assembly 1000 further includes a lid body 6, a latch 7, and an unlocking structure 8. The latch 7 is movably disposed on the lid body 6 and has a locking position for locking with the pot body of the pressure cooking appliance and an unlocking position for releasing the pot body during its movement. The unlocking structure 8 includes an unlocking member 81 movably disposed on the lid body 6. The unlocking member 81 has an initial position, and its movement includes a first movement and a second movement sequentially moving in the same direction from the initial position. During the first movement, the unlocking member 81 can drive the pusher 3 to move, thereby pushing the first valve core 21 toward the pressure relief position. During the second movement, the unlocking member 81 drives the latch 7 to move from the locking position to the unlocking position. The safety valve 100 is disposed on the lid body 6. With this configuration, since the movement of the unlocking component 81 includes a first movement and a second movement sequentially in the same direction from the initial position, during the process of opening the latch 7 through the unlocking component 81, that is, between the second movement of the unlocking component 81, the first movement must be passed first. In other words, before opening the cover, the driving pusher 3 must be activated first to push the first valve core 21 toward the pressure relief position, so that the high-pressure steam in the pot can be discharged through the airflow channel 13, and the air pressure in the pot can be reduced to a lower level, thereby reducing the air pressure in the pot when the cover is opened and improving the safety factor.

[0073] The unlocking element 81 has multiple unlocking methods; it can rotate or slide. Due to the high pressure inside the pot of the pressure cooking appliance, opening the lid 6 becomes more difficult. When the unlocking element 81 slides, it becomes more difficult for the user to pull or push it open. Therefore, in this embodiment of the invention, the unlocking element 81 is rotatably mounted on the lid 6, having a first and a second rotational stroke. In this case, the unlocking element 81 acts as a lever that saves effort, making operation easier.

[0074] In order for the unlocking member 81 to push the pushing member 3 during the first active stroke, in some embodiments, when the unlocking member 81 is slidably disposed on the cover 6, a guide slope can be provided on the unlocking member 81 and / or the pushing member 3. During the first active stroke, the direction of the force is changed by the guide slope, so that the unlocking member 81 can squeeze the pushing member 3. In an embodiment of the present invention, the unlocking member 81 is rotatably disposed on the cover 6, the pushing member 3 is movably disposed along the radial direction of the unlocking member 81, and a squeezing protrusion 811 is provided on the circumferential side of the unlocking member 81. During the first active stroke of the unlocking member 81, the squeezing protrusion 811 squeezes the pushing member 3, so that the first valve core 21 moves to the pressure relief position, thereby releasing the high-temperature and high-pressure gas in the pot.

[0075] Furthermore, in order to allow more of the high-temperature, high-pressure gas inside the pot to be discharged from the safety valve 100 before the lid 6 is fully opened, in this embodiment of the invention, the squeezing protrusion 811 maintains pressure on the pushing member 3 during the second active stroke of the unlocking member 81; this can be achieved simply by designing the shape of the squeezing protrusion 811. In this way, the high-temperature, high-pressure gas inside the pot can be discharged as much as possible, and the gas pressure of the gas rushing out when the lid 6 is opened can be reduced to a lower level, thereby improving the safety factor.

[0076] As described above, the high pressure inside the pot makes it more difficult to open the latch 7. To facilitate the unlocking member 81 in opening the latch 7, in this embodiment of the invention, the unlocking structure 8 further includes a lever 82. One end of the lever 82 is tractively connected to the latch 7, and the other end is tractively connected to the unlocking member 81 at least during its second active stroke, so as to drive the latch 7 from the locked position to the unlocked position during the second active stroke of the unlocking member 81. With this configuration, the lever 82 acts as another force-saving lever, making it easier for the unlocking member 81 to overcome the force of the high-pressure gas on the lid 6 during rotation.

[0077] This design does not limit the transmission method between the lever 82 and the latch 7. The transmission method varies depending on the movement of the latch 7. In some embodiments, the latch 7 rotates on the cover 6, requiring the rotating lever 82 to drive the latch 7 to rotate. The transmission method can be either a snap-fit ​​or a fixed connection. In other embodiments, the latch 7 slides on the cover 6, requiring a reversing transmission structure such as a hinged rod to convert the rotation of the lever 82 into the sliding of the latch 7.

[0078] It is understandable that if the lever 82 rotates with the unlocking member 81 during the first active stroke of the unlocking member 81, even if the latch 7 does not completely separate from the lid 6, there may be a small gap. This gap will cause the high-pressure gas in the pot to not completely leak out from the safety valve 100, but to leak between the lid 6 and the pot, which may cause injury to the user.

[0079] Therefore, in the embodiments of this utility model, please continue to refer to... Figure 6 and Figure 7 The lever 82 and the unlocking member 81 are rotatably disposed relative to each other; an anti-rotation structure 83 is provided between the lever 82 and the unlocking member 81, the anti-rotation structure 83 having a rotating state and an anti-rotation state; corresponding to the first active stroke of the unlocking member 81, the anti-rotation structure 83 is in the rotating state, and the lever 82 and the unlocking member 81 can rotate relative to each other; corresponding to the second active stroke of the unlocking member 81, the anti-rotation structure 83 is in the anti-rotation state, restricting the relative rotation of the lever 82 and the unlocking member 81. With this configuration, the anti-rotation structure 83 ensures that when the unlocking member 81 rotates, the lever 82 can either rotate or remain stationary. During the first stroke of the unlocking member 81, its rotation only pushes the first valve core 21 towards the pressure relief position, allowing the high-pressure gas inside the pot to escape through the safety valve 100, while the lever 82 remains stationary. This reduces the possibility of high-temperature, high-pressure gas overflowing through the gap between the lid 6 and the pot body and injuring the user. When it is necessary to open the latch 7... That is, during the second active stroke of the unlocking member 81, the anti-rotation structure 83 is in the anti-rotation state, restricting the relative rotation of the lever 82 and the unlocking member 81. Thus, the unlocking member 81 can drive the lever 82 to rotate, thereby driving the latch 7 to move to the unlock position and opening the cover 6. At the same time, even if the air pressure inside the pot is still higher than atmospheric pressure during the movement of the latch 7, it has already been depressurized by the safety valve 100 and is now at a pressure that allows for safe opening, thus reducing the possibility of harm to the user.

[0080] The anti-rotation structure 83 can take various forms. In some embodiments, a button can be provided on the unlocking member 81, and a locking block and a locking slot can be provided between the unlocking member 81 and the lever 82. At least one of the locking blocks and locking slots is provided in multiples along the axial direction of the unlocking member 81. When the button is pressed or released, the locking block and the locking slot separate or engage, so that the anti-rotation structure 83 can switch between the anti-rotation state and the rotation state, thereby enabling the unlocking member 81 to rotate relative to the lever 82 and also drive the lever 82 to rotate together.

[0081] In an embodiment of this utility model, the anti-rotation structure 83 includes a stop portion 831 and a mating portion 832. When the unlocking member 81 is in the first active stroke, the stop portion 831 and the mating portion 832 are spaced apart. When the unlocking member 81 is at the end of the first active stroke, the stop portion 831 and the mating portion 832 abut against each other, so that the unlocking member 81 drives the lever 82 to rotate. This configuration effectively creates a free travel between the stop part 831 and the mating part 832, corresponding to the first active travel of the unlocking member 81. During this free travel, the stop part 831 and the mating part 832 do not engage, preventing the unlocking member 81 from rotating and thus preventing the lever 82 from rotating. After rotating to a certain extent, the stop part 831 and the mating part 832 come into contact, placing the unlocking member 81 in its second active travel. The lever 82 can then be rotated through the engagement of the stop part 831 and the mating part 832. No additional button is required; the operation is more convenient simply by rotating the unlocking member 81.

[0082] The stop portion 831 and the mating portion 832 can take various forms. In some embodiments, one of the unlocking member 81 and the lever 82 is provided with a limiting protrusion, and the other is provided with an annular groove. The limiting protrusion mates with the annular groove, and the mating portion 832 includes the limiting protrusion. One end wall of the annular groove serves as the stop portion 831. During the first active stroke of the unlocking member 81, the limiting protrusion rotates within the annular groove. When the unlocking member 81 is at the end of the first active stroke, the limiting protrusion abuts against one end wall of the annular groove, at which point it enters the second active stroke, allowing the unlocking member 81 to drive the lever 82 to rotate. In some embodiments, both the unlocking member 81 and the lever 82 may have protrusions.

[0083] Understandably, since the unlocking component 81 can move relative to the lid 6, it is prone to wobbling. Even after the lid 6 closes the pot, the unlocking component 81 may be positioned at a certain point on its first travel stroke, causing the first valve body 1 to be in the pressure relief position, thus affecting subsequent use. Therefore, in this embodiment of the invention, a reset component 9 is provided between the lid 6 and the unlocking component 81 to reset the unlocking component 81 to its initial position. The reset component 9 prevents the unlocking component 81 from wobbling and, when no external force is applied, keeps it in its initial position, ensuring it does not affect subsequent use.

[0084] The reset element 9 can take various forms, and its form will also differ depending on the movement mode of the unlocking element 81. For example, when the unlocking element 81 slides on the cover 6, the reset element 9 can be a tension spring or a compression spring; when the unlocking element 81 is rotatably mounted on the cover 6, please refer to... Figure 7 The reset element 9 may be a torsion spring disposed between the lever 82 and the unlocking element 81.

[0085] This utility model also proposes a pressure cooking appliance, which includes a lid assembly 1000. The specific structure of the lid assembly 1000 is as described in the above embodiments. Since this pressure cooking appliance adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0086] The pressure cooking appliances include pressure cookers, electric pressure cookers, and pressure rice cookers.

[0087] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A safety valve, characterized in that, include: The valve body is provided with an air inlet, an air outlet, and an airflow channel connecting the air inlet and the air outlet. The airflow channel is provided with a blocking part to divide the airflow channel into an air inlet channel communicating with the air inlet and an air outlet channel communicating with the air outlet. The valve body is also provided with a first vent, a second vent, and a receiving cavity connecting the first vent and the second vent. The first vent and the second vent are respectively connected to the air inlet channel and the air outlet channel. A first switching valve assembly includes a first valve core, a seal, and a first elastic element. One end of the first valve core is movably disposed within the receiving cavity, and has a blocking position for blocking the first vent and a depressurizing position for releasing the blockage during its movement. The seal is disposed between the first valve core and the side wall of the receiving cavity to divide the receiving cavity into a first chamber close to the airflow channel and a second chamber away from the airflow channel. The first chamber communicates with the first vent and the second vent. The first elastic element is disposed outside the first chamber to provide a driving force for the first valve core to move toward the blocking position. as well as, A pusher is driven and connected to the first valve core to push the first valve core toward the pressure relief position.

2. The safety valve as described in claim 1, characterized in that, The seal includes an elastic sealing gasket, the elastic sealing gasket comprising: The main body is disposed at one end of the first valve core facing the airflow channel; and, An elastic deformation portion is arranged in a ring shape, and the elastic deformation portion is disposed on the outer periphery of the main body and is fixedly connected to the side wall of the receiving cavity; Specifically, when in the blocked position, the main body blocks the first vent. When the first valve core moves toward the pressure relief position, the main body moves with the first valve core to release the blockage of the first vent.

3. The safety valve as described in claim 2, characterized in that, The receiving cavity is open at one end away from the airflow channel, and an annular mounting groove is provided on the side wall at the opening of the receiving cavity; The edge of the elastically deformable portion is disposed within the annular mounting groove; The safety valve also includes a valve cover that covers the opening of the receiving cavity and presses against the edge of the elastically deformable portion.

4. The safety valve as described in claim 1, characterized in that, The valve body is also provided with a third vent that connects the air intake channel to the outside. The safety valve further includes a second switching valve assembly, which includes a second valve core and a second elastic element disposed between the second valve core and the valve body. The second elastic element provides the driving force for the second valve core to normally close the third vent. When the pressure in the air intake channel is greater than the preset limit pressure, the second valve core opens the third vent.

5. A lid assembly for use in a pressure cooking appliance, characterized in that, The pot lid assembly includes a safety valve as described in any one of claims 1 to 4.

6. The pot lid assembly as described in claim 5, characterized in that, The pot lid assembly also includes: Cover; A latch is movably disposed on the lid, having a locking position for locking with the pot body of the pressure cooking appliance and an unlocking position for releasing the pot body during its movement. The unlocking structure includes an unlocking member movably disposed on the cover body. The unlocking member has an initial position, and the movement of the unlocking member includes a first movement and a second movement that proceed sequentially in the same direction from the initial position. During the first movement, the unlocking member can drive the pusher to move, thereby pushing the first valve core toward the pressure relief position. During the second movement, the unlocking member drives the latch to move from the locked position to the unlocked position. The safety valve is located on the cover.

7. The pot lid assembly as described in claim 6, characterized in that, The unlocking mechanism is rotatably mounted on the cover.

8. The pot lid assembly as described in claim 7, characterized in that, The unlocking structure further includes a lever, one end of which is tractively connected to the latch, and the other end of which is tractively connected to the unlocking member at least during the second active stroke of the unlocking member, so as to drive the latch to move from the locked position to the unlocked position during the second active stroke of the unlocking member.

9. The pot lid assembly as described in claim 8, characterized in that, The lever and the unlocking component are rotatably configured relative to each other; An anti-rotation structure is provided between the lever and the unlocking component, and the anti-rotation structure has a rotating state and an anti-rotation state. When the unlocking element has a first active stroke, the anti-rotation structure is in the rotating state, and the lever and the unlocking element can rotate relative to each other. When the unlocking element has a second active stroke, the anti-rotation structure is in the anti-rotation state, restricting the relative rotation of the lever and the unlocking element.

10. The pot lid assembly as claimed in claim 9, characterized in that, The anti-rotation structure includes a stop part and a mating part. When the unlocking member is in the first active stroke, the stop part and the mating part are spaced apart. When the unlocking member is at the end of the first active stroke, the stop part and the mating part abut against each other, so that the unlocking member drives the lever to rotate.

11. The pot lid assembly as claimed in claim 10, characterized in that, One of the unlocking component and the lever is provided with a limiting protrusion, and the other is provided with an annular groove. The limiting protrusion and the annular groove cooperate with each other. The cooperating part includes the limiting protrusion, and one end wall of the annular groove is the stop part.

12. The pot lid assembly as claimed in claim 7, characterized in that, The pushing member is radially movable along the unlocking member; The unlocking member has a protruding compression protrusion on its periphery, which compresses the pushing member during the first active stroke of the unlocking member.

13. The pot lid assembly as described in claim 12, characterized in that, During the second active stroke of the unlocking member, the pressing protrusion maintains pressure on the pushing member.

14. The pot lid assembly as claimed in claim 6, characterized in that, A reset component is provided between the cover and the unlocking component to reset the unlocking component to its initial position.

15. A pressure cooking appliance, characterized in that, Includes the pot lid assembly as described in any one of claims 6 to 14.

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