Pressure relief valve assembly and cooking appliance

Abstract

The utility model discloses a kind of pressure relief valve assemblies and cooking utensils, the pressure relief valve assembly includes pressure relief valve and sealing element, pressure relief valve is used to be arranged in the top of cooking utensil, pressure relief valve has air inlet hole and exhaust hole, air inlet hole is used to communicate with the chamber of cooking utensil, air inlet hole can be opened to communicate with exhaust hole when the steam pressure in chamber reaches threshold value, pressure relief valve also has through-hole and drainage component, through-hole is used to communicate chamber and outside, drainage component is arranged with interval with through-hole, drainage component is used to guide the condensate in pressure relief valve to the outer periphery of pressure relief valve, sealing element is located at the bottom of pressure relief valve, at least part of sealing element can close through-hole under the action of steam pressure in chamber and open through-hole when outside pressure is greater than the pressure in chamber.The pressure relief valve assembly of the utility model embodiment improves sealing effect, ensures the micro-pressure environment in cooking utensil, improves cooking efficiency.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a pressure relief valve assembly and a cooking appliance. Background Technology

[0002] The cookware lids are equipped with pressure relief valve assemblies. During steaming or cooking, if the steam pressure inside the cookware reaches a threshold, the steam can be released through the vent of the pressure relief valve assembly to relieve pressure. In related technologies, the pressure relief valve assembly also includes a return port and a sealing gasket. Driven by airflow, the sealing gasket can open and close the return port. When steam is released, condensate generated can flow back into the cookware through the return port. Furthermore, if there is excessive negative pressure inside the cookware, opening the return port can prevent the lid from being squeezed, deformed, or even damaged.

[0003] However, in related technologies, the sealing gaskets of cooking appliances are easily washed open by condensation during the depressurization process. The return port connects the outside world with the inside of the cooking appliance, reducing the sealing effect, disrupting the micro-pressure environment inside the cooking appliance, and affecting cooking efficiency. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a pressure relief valve assembly and a cooking appliance. This pressure relief valve assembly can improve the sealing effect, ensure a micro-pressure environment within the cooking appliance, and improve cooking efficiency.

[0005] The pressure relief valve assembly of this utility model embodiment includes:

[0006] A pressure relief valve is provided on the top of a cooking appliance. The pressure relief valve has an air inlet and an air outlet. The air inlet communicates with the chamber of the cooking appliance and can open to communicate with the air outlet when the steam pressure in the chamber reaches a threshold. The pressure relief valve also has a through hole and a drain component. The through hole communicates with the chamber and the outside. The drain component is arranged at a distance from the through hole and is used to guide condensate in the pressure relief valve to the outer periphery of the pressure relief valve.

[0007] A sealing element is disposed at the bottom of the pressure relief valve. At least a portion of the sealing element can close the through hole under the action of the steam pressure in the chamber and open the through hole when the external pressure is greater than the pressure in the chamber.

[0008] The pressure relief valve assembly of this utility model can release gas from the cooking appliance through the air inlet and exhaust port when the steam pressure inside the cooking appliance is too high, thus relieving pressure. After cooking, the cooking appliance is filled with negative pressure due to the rapid condensation of water vapor. The external pressure is greater than the internal pressure, which forces the seal open to allow the external environment to be connected to the inside of the cooking appliance through the through hole, balancing the internal and external pressures. This prevents excessive negative pressure inside the cooking appliance from deforming or even damaging the top cover, thus extending the service life of the cooking appliance. Furthermore, the condensate in the pressure relief valve is guided to the outer periphery of the valve through a drain component spaced apart from the through hole, preventing the condensate from flowing back through the through hole during the pressure relief process and forcing open the seal. This improves the sealing effect, ensures a micro-pressure environment inside the cooking appliance, and improves cooking efficiency.

[0009] Optionally, the pressure relief valve includes a mounting portion, the drainage component is disposed in the mounting portion, the mounting portion includes a bottom wall and a peripheral wall, the peripheral wall is disposed on the top surface of the bottom wall and extends circumferentially along the bottom wall, the peripheral wall is located inside the outer periphery of the bottom wall and spaced apart from the outer periphery of the bottom wall, at least a portion of the air inlet is disposed in the bottom wall and is located inside the peripheral wall, and the through hole is disposed in the bottom wall and is located outside the peripheral wall.

[0010] In this embodiment of the pressure relief valve assembly, at least part of the air inlet is located on the bottom wall and inside the peripheral wall. The peripheral wall can guide the steam discharged from the air inlet. The through hole is located on the outside of the peripheral wall to separate the through hole from the air inlet, thereby preventing the condensate formed during the pressure relief process from flowing back through the through hole and breaking the seal, thus improving the sealing effect.

[0011] Optionally, the drainage component includes a drainage channel and at least two drainage baffles. The drainage channel is disposed on the peripheral wall, and the drainage baffles are disposed on the bottom wall and located on the outer side of the peripheral wall. The drainage baffles and the through holes are arranged at intervals in the circumferential direction of the bottom wall, and the gap between two adjacent drainage baffles is arranged opposite to the drainage channel in the inward and outward directions of the peripheral wall.

[0012] In this embodiment of the pressure relief valve assembly, during pressure relief, some of the steam will condense into liquid water and accumulate on the inner side of the peripheral wall. Due to the thrust of the steam being discharged outward, the condensate will overflow outward. The drain groove can preferentially discharge the overflowing condensate, and the drain baffle guides the discharge, preventing the condensate from falling into the through hole and opening the seal, thus ensuring the sealing effect.

[0013] Optionally, there are at least two drainage channels, and each drainage channel corresponds to two adjacent drainage baffles.

[0014] The pressure relief valve assembly of this utility model embodiment has at least two drainage grooves, which improves the discharge efficiency of condensate in the pressure relief valve and prevents excessive condensate from overflowing and flowing into the through hole.

[0015] Optionally, the pressure relief valve further includes a valve cover, which is rotatably disposed on the outer periphery of the peripheral wall, and the vent hole is disposed on the valve cover.

[0016] In this embodiment of the pressure relief valve assembly, the valve cover is located on the outer periphery of the peripheral wall, which can protect the mounting part, prevent impurities from clogging the air inlet on the mounting part, and ensure pressure relief efficiency. Moreover, the valve cover is rotatably mounted on the peripheral wall, and the valve cover can be disassembled from the peripheral wall by rotation, thereby improving installation efficiency.

[0017] Optionally, the outer peripheral surface of the peripheral wall is provided with a first protrusion, the first protrusion is provided with a first snap-fit ​​groove, the first snap-fit ​​groove is opened at one end of the peripheral wall in the circumferential direction, and the inner peripheral surface of the valve cover is provided with a first rib, the first rib can be fitted into the first snap-fit ​​groove.

[0018] In this embodiment of the pressure relief valve assembly, when the valve cover is installed on the mounting part, the valve cover is rotated so that the first protrusion on the valve cover can be screwed into the first locking groove along the opening at one end of the first locking groove. The first protrusion and the first locking groove cooperate to improve the installation efficiency of the valve cover and the mounting part and ensure the firmness of the valve cover installation on the mounting part.

[0019] Optionally, there are at least two first protrusions, which are arranged at circumferential intervals along the peripheral wall, and there are at least two first ribs, which correspond one-to-one with the at least two first protrusions.

[0020] In this embodiment of the utility model, the pressure relief valve assembly has at least two first protrusions corresponding one-to-one with at least two first ribs, further ensuring the stability and firmness of the valve cover installation on the mounting part.

[0021] Optionally, the outer peripheral surface of the peripheral wall is provided with a limiting part, the limiting part and the first snap-fit ​​groove are arranged at intervals in the circumferential direction of the peripheral wall, the inner peripheral surface of the valve cover has a second rib, the second rib and the first rib are arranged at intervals in the circumferential direction of the valve cover, and the second rib and the limiting part abut against each other in the circumferential direction of the peripheral wall.

[0022] In this embodiment of the pressure relief valve assembly, the second rib and the limiting part abut against each other in the circumferential direction of the peripheral wall to limit the valve cover in the circumferential direction, prevent the valve cover from falling off the peripheral wall, and improve the stability of the valve cover installation.

[0023] Optionally, the bottom surface of the valve cover is provided with a groove, the groove being located on at least one side of the second rib in the circumferential direction of the valve cover; and / or,

[0024] There are at least two limiting parts, and the at least two limiting parts are arranged at intervals along the circumferential direction of the peripheral wall. There are at least two second protruding ribs, and the at least two second protruding ribs correspond one-to-one with the at least two limiting parts.

[0025] In the pressure relief valve assembly of this utility model embodiment, the second rib has a groove on at least one side of the valve cover in the circumferential direction, which can provide a larger deformation allowance and reduce the resistance of the second rib passing the limiting part when the valve cover is screwed into the peripheral wall.

[0026] At least two limiting parts and at least two second ribs are provided in a one-to-one correspondence, which can further limit the valve cover in the circumferential direction and further improve the stability of the valve cover on the mounting part.

[0027] Optionally, the inner circumferential surface of the valve cover is provided with a second protrusion, the second protrusion is provided with a second snap-fit ​​groove, the second snap-fit ​​groove is opened at one end in the circumferential direction of the valve cover, and the outer circumferential surface of the peripheral wall is provided with a third rib, the third rib can be fitted into the second snap-fit ​​groove.

[0028] In this embodiment of the pressure relief valve assembly, when the valve cover is installed on the mounting part, the valve cover is rotated so that the third protruding rib on the peripheral wall can be screwed into the second locking groove along the opening at one end of the second locking groove. The third protruding rib cooperates with the second locking groove, which improves the installation efficiency of the valve cover and the mounting part and ensures the firmness of the valve cover installation on the mounting part.

[0029] Optionally, the pressure relief valve further includes a bracket and a valve core. The bracket is disposed within the space enclosed by the valve cover and the mounting portion. The air inlet includes a first air inlet section disposed on the bottom wall and located inside the peripheral wall, and a second air inlet section disposed at the bottom of the bracket. The valve core is disposed within the bracket to open and close the second air inlet section, and the second air inlet section communicates with the exhaust port.

[0030] The pressure relief valve assembly of this utility model achieves pressure relief by opening and closing the second air intake section with the valve core to connect or disconnect the first air intake section and the exhaust port. It is simple to operate and easy to implement. Moreover, placing the valve core on the bracket can improve the stability of the valve core and ensure pressure relief efficiency.

[0031] Optionally, the bracket includes a mating part and an assembly part. The mating part mates with the top surface of the bottom wall. The second air intake section is disposed in the mating part and penetrates the mating part in the vertical direction. The assembly part is disposed on the top surface of the mating part. The valve core is disposed in the assembly part and can move vertically relative to the assembly part.

[0032] In this embodiment of the utility model, the pressure relief valve assembly has a valve core located inside the assembly part, which makes the valve core securely mounted on the bracket and not easy to detach. It can also limit the position of the valve core on the bracket, ensure the overlap of the valve core and the air inlet in the axial projection direction, and ensure the sealing effect of the valve core on the air inlet. Moreover, the mating part matches the top surface of the bottom wall, which improves the fit between the bracket and the mounting part.

[0033] Optionally, the assembly part is provided with a through groove that penetrates the wall thickness of the assembly part and connects the air inlet and the exhaust port; and / or, the bracket further includes a limiting block disposed on the inner side of the assembly part, the limiting block being arranged inwardly in a top-to-bottom direction to limit the valve core.

[0034] The pressure relief valve assembly of this utility model can facilitate the discharge of steam from the air inlet to the exhaust port by providing a through groove on the assembly part, thereby improving the pressure relief efficiency.

[0035] The position of the valve core on the bracket is further restricted by the limiting block, which further ensures the overlap between the valve core and the air inlet in the axial projection direction, and ensures the sealing effect of the valve core on the air inlet. Moreover, the inclined arrangement of the limiting block can facilitate the valve core to fall under the action of gravity after the pressure is released to close the air inlet.

[0036] Optionally, the seal includes:

[0037] An annular ring, wherein the annular ring is disposed in the first air intake section;

[0038] A first sealing section extends outward from the top of the annular ring and is located between the bottom wall and the bottom surface of the bracket;

[0039] The second sealing section extends outward from the bottom end of the annular ring and is located below the bottom wall, with at least a portion of the second sealing section arranged opposite to the through hole in the vertical direction.

[0040] In this embodiment of the pressure relief valve assembly, the first sealing section improves the sealing between the bottom wall and the bottom surface of the support, making it difficult for steam in the chamber to escape from between the bottom wall and the bottom surface of the support; the second sealing section is arranged opposite to the through hole in the vertical direction, so that the second sealing section can easily close or open the through hole under the action of steam pressure in the chamber and external gas. Thus, the sealing effect is further guaranteed by the sealing element of the above form.

[0041] The cooking appliance of this utility model embodiment includes:

[0042] Pot body;

[0043] A lid, wherein the lid is disposed at the top of the pot body;

[0044] A pressure relief valve assembly is disposed on the top of the pot lid, and the pressure relief valve assembly is the pressure relief valve assembly described in any of the above embodiments.

[0045] In this embodiment of the cooking appliance, the steam inside the pot can be discharged through the pressure relief valve assembly, and the pressure relief method is simple, ensuring a micro-pressure environment inside the cooking appliance and improving cooking efficiency. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of a cooking appliance according to an embodiment of the present utility model.

[0047] Figure 2 This is a cross-sectional view of the cooking appliance according to an embodiment of the present utility model.

[0048] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0049] Figure 4 This is a schematic diagram of the mounting portion of the pressure relief valve assembly according to an embodiment of the present invention.

[0050] Figure 5 This is a schematic diagram of the valve cover of the pressure relief valve assembly according to an embodiment of the present invention.

[0051] Figure 6 This is a schematic diagram of the internal structure of the valve cover of the pressure relief valve assembly according to an embodiment of the present invention.

[0052] Figure 7 This is a schematic diagram of another embodiment of the mounting portion of the pressure relief valve assembly according to an embodiment of the present utility model.

[0053] Figure 8 This is a schematic diagram of another embodiment of the valve cover of the pressure relief valve assembly of this utility model.

[0054] Figure 9 This is a schematic diagram of the bracket for the pressure relief valve assembly according to an embodiment of the present invention.

[0055] Figure 10 This is a schematic diagram of the pressure relief valve assembly during pressure relief and exhaust in an embodiment of this utility model.

[0056] Figure 11 This is a schematic diagram of the pressure relief valve assembly under negative pressure intake according to an embodiment of this utility model.

[0057] Reference numerals: 100, cooking utensil; 200, pressure relief valve assembly; 1, pressure relief valve; 11, air inlet; 111, first air inlet section; 112, second air inlet section; 12, exhaust port; 13, through hole; 14, drainage component; 141, drainage groove; 142, drainage baffle; 15, mounting part; 151, bottom wall; 152, peripheral wall; 1521, first protrusion; 1522, first snap-fit ​​groove; 1523, limiting part; 153, third protrusion. ; 16. Valve cover; 161. First rib; 162. Second rib; 163. Recess; 164. Limiting rib; 165. Groove; 166. Second protrusion; 17. Bracket; 171. Fitting part; 172. Assembly part; 173. Limiting block; 174. Through groove; 18. Valve core; 2. Sealing element; 21. Annular ring; 22. First sealing section; 23. Second sealing section; 3. Pot body; 4. Pot lid; 5. Chamber; 6. Condensate buffer section. Detailed Implementation

[0058] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0059] like Figures 1-11 As shown, the pressure relief valve assembly of this embodiment includes a pressure relief valve 1 and a sealing element 2. The pressure relief valve 1 is disposed on the top of the cooking appliance 100. The pressure relief valve 1 has an inlet 11 and an outlet 12. The inlet 11 communicates with the chamber 5 of the cooking appliance 100. The inlet 11 opens to communicate with the outlet 12 when the steam pressure in the chamber 5 reaches a threshold. The pressure relief valve 1 also has a through-hole 13 and a drain component 14. The through-hole 13 connects the chamber 5 to the outside. The drain component 14 is spaced apart from the through-hole 13 and guides the condensate in the pressure relief valve 1 to its outer periphery. The sealing element 2 is disposed at the bottom of the pressure relief valve 1. At least a portion of the sealing element 2 can close the through-hole 13 under the action of the steam pressure in the chamber 5 and open the through-hole 13 when the external pressure is greater than the pressure in the chamber 5.

[0060] The pressure relief valve assembly of this utility model embodiment can release the gas inside the cooking appliance 100 through the air inlet 11 and the exhaust 12 when the steam pressure inside the cooking appliance 100 is too high, thus relieving pressure. Moreover, after cooking, a negative pressure is formed inside the cooking appliance 100 due to the rapid condensation of water vapor. The external pressure is greater than the pressure inside the cooking appliance 100, thereby opening the seal 2 to conduct the external and internal pressures of the cooking appliance 100 through the through hole 13, balancing the internal and external pressures of the cooking appliance 100. This prevents the excessive negative pressure inside the cooking appliance 100 from squeezing and deforming or even damaging the top cover of the cooking appliance 100, thus extending the service life of the cooking appliance 100. Furthermore, the condensate in the pressure relief valve 1 is guided to the outer periphery of the pressure relief valve 1 through the drain component 14, which is spaced apart from the through hole 13, to prevent the condensate from flowing back through the through hole 13 during the pressure relief process and opening the seal 2, thus improving the sealing effect, ensuring the micro-pressure environment of the cooking appliance, and improving cooking efficiency.

[0061] Optionally, such as Figure 3 and Figure 4 As shown, the pressure relief valve 1 includes a mounting part 15 and a drainage component 14 disposed in the mounting part 15. The mounting part 15 includes a bottom wall 151 and a peripheral wall 152. The peripheral wall 152 is disposed on the top surface of the bottom wall 151 and extends circumferentially along the bottom wall 151. The peripheral wall 152 is located inside the outer periphery of the bottom wall 151 and spaced apart from the outer periphery of the bottom wall 151. At least a portion of the air inlet 11 is disposed in the bottom wall 151 and is located inside the peripheral wall 152. The through hole 13 is disposed in the bottom wall 151 and is located outside the peripheral wall 152.

[0062] Specifically, at least a portion of the air inlet 11 is located on the bottom wall 151 and inside the peripheral wall 152. The peripheral wall 152 can guide the steam discharged from the air inlet 11. The through hole 13 is located outside the peripheral wall 152 to separate the through hole 13 from the air inlet 11 through the peripheral wall 152, so as to prevent the condensate formed during the depressurization process from flowing back through the through hole 13 and breaking the seal 2, thereby improving the sealing effect.

[0063] Optionally, such as Figure 4 As shown, the drainage component 14 includes a drainage channel 141 and at least two drainage baffles 142. The drainage channel 141 is disposed on the peripheral wall 152, and the drainage baffles 142 are disposed on the bottom wall 151 and located on the outside of the peripheral wall 152. The drainage baffles 142 and the through holes 13 are arranged at intervals in the circumferential direction of the bottom wall 151. The gap between two adjacent drainage baffles 142 is arranged opposite to the drainage channel 141 in the inner and outer directions of the peripheral wall 152.

[0064] Specifically, the drainage groove 141 is formed by the recess on the top surface of the peripheral wall 152. When the pressure is released, some of the steam will condense into liquid water and accumulate on the inner side of the peripheral wall 152. Due to the thrust of the steam being discharged outward, the condensate will overflow. The drainage groove 141 can discharge the overflowing condensate first, and the drainage baffle 142 guides the discharge, preventing the condensate from falling into the through hole 13 and opening the seal 2, thus ensuring the sealing effect.

[0065] Optionally, there are at least two drainage channels 141, and any one drainage channel 141 corresponds to two adjacent drainage baffles 142.

[0066] Specifically, the installation of at least two drain channels 141 improves the discharge efficiency of condensate in the pressure relief valve 1 and prevents excessive condensate in the pressure relief valve 1 from overflowing and flowing into the through hole 13.

[0067] Optionally, such as Figure 3 , Figure 5 and Figure 6 As shown, the pressure relief valve 1 also includes a valve cover 16, which is rotatably disposed on the outer periphery of the peripheral wall 152, and an exhaust port 12 is disposed on the valve cover 16.

[0068] Specifically, the valve cover 16 is located on the outer periphery of the peripheral wall 152, which can protect the mounting part 15, prevent impurities from clogging the air inlet 11 on the mounting part 15, and ensure pressure relief efficiency. Moreover, the valve cover 16 is rotatably mounted on the peripheral wall 152, and the valve cover 16 can be disassembled from the peripheral wall 152 by rotation, thereby improving installation efficiency.

[0069] Specifically, the gap between the valve cover 16 and the bottom wall 151 is C1, and C1 > 0, so as to increase the air intake flow of external gas into the through hole 13.

[0070] Optionally, the outer peripheral surface of the peripheral wall 152 is provided with a first protrusion 1521, the first protrusion 1521 is provided with a first snap-fit ​​groove 1522, the first snap-fit ​​groove 1522 is opened at one end in the circumferential direction of the peripheral wall 152, and the inner peripheral surface of the valve cover 16 is provided with a first rib 161, the first rib 161 can be fitted into the first snap-fit ​​groove 1522.

[0071] Specifically, such as Figure 4 As shown, the first protrusion 1521 is provided on the outer peripheral surface of the peripheral wall 152. The first protrusion 1521 has an opening on the side away from the peripheral wall 152. The first rib 161 is provided on the inner peripheral surface of the valve cover 16. When the valve cover 16 is installed on the mounting part 15, the valve cover 16 is rotated so that the first rib 161 on the valve cover 16 can be screwed into the first locking groove 1522 along the opening at one end of the first locking groove 1522. The first rib 161 cooperates with the first locking groove 1522 to improve the installation efficiency of the valve cover 16 and the mounting part 15 and ensure the firmness of the valve cover 16 installed on the mounting part 15.

[0072] Optionally, such as Figure 4 As shown, there are at least two first protrusions 1521, and the at least two first protrusions 1521 are arranged at intervals along the circumferential direction of the peripheral wall 152. There are at least two first ribs 161, and the at least two first ribs 161 correspond one-to-one with the at least two first protrusions 1521.

[0073] Specifically, at least two first protrusions 1521 are evenly spaced along the circumferential wall 152, and at least two first ribs 161 are evenly spaced along the circumferential wall 16 and correspond one-to-one with the at least two first protrusions 1521, further ensuring the stability and firmness of the valve cover 16 on the mounting part 15.

[0074] Optionally, such as Figure 4 As shown, the outer peripheral surface of the peripheral wall 152 is provided with a limiting part 1523. The limiting part 1523 and the first snap-fit ​​groove 1522 are arranged at intervals in the circumferential direction of the peripheral wall 152. The inner peripheral surface of the valve cover 16 has a second rib 162. The second rib 162 and the first rib 161 are arranged at intervals in the circumferential direction of the valve cover 16. The second rib 162 and the limiting part 1523 abut against each other in the circumferential direction of the peripheral wall 152.

[0075] Specifically, the second rib 162 and the limiting part 1523 abut against each other in the circumferential direction of the peripheral wall 152 to limit the valve cover 16 in the circumferential direction, prevent the valve cover 16 from falling off the peripheral wall 152, and improve the stability of the valve cover 16 installation.

[0076] Optionally, the bottom surface of the valve cover 16 is provided with a groove 165, which is located on at least one side of the second rib 162 in the circumferential direction of the valve cover 16.

[0077] Specifically, the second rib 162 has a groove 165 on at least one side of the valve cover 16 in the circumferential direction, which can provide a larger deformation allowance and reduce the resistance of the second rib 162 passing over the limiting part 1523 when the valve cover 16 is screwed onto the peripheral wall 152. It can be understood that when the valve cover 16 rotates counterclockwise, the second rib 162 passes over the limiting part 1523 first in the counterclockwise direction. When the valve cover 16 is stopped, the second rib 162 is located on the downstream side of the limiting part 1523 in the counterclockwise direction and the two stop each other, restricting the valve cover 16 from rotating clockwise.

[0078] Optionally, such as Figure 4 As shown, there are at least two limiting portions 1523, which are arranged at intervals along the circumferential direction of the peripheral wall 152. There are at least two second protruding ribs 162, which correspond one-to-one with the at least two limiting portions 1523.

[0079] Specifically, at least two limiting portions 1523 are evenly spaced along the circumferential wall 152, and at least two second ribs 162 are evenly spaced along the inner circumferential surface of the valve cover 16 and are provided in a one-to-one correspondence with the at least two limiting portions 1523, which can further limit the valve cover 16 in the circumferential direction and further improve the stability of the valve cover 16 on the mounting portion 15.

[0080] At least two first protrusions 1521 and at least two limiting portions 1523 are arranged alternately and evenly along the circumference of the peripheral wall 152 to further improve the fit between the mounting portion 15 and the valve cover 16 and ensure that the valve cover 16 is firmly installed on the mounting portion 15.

[0081] It is understandable that the fit between the valve cover 16 and the peripheral wall 152 is not limited to... Figures 4-6 The coordination method, for example in some other embodiments, such as Figure 7 and Figure 8 As shown, the inner circumferential surface of the valve cover 16 is provided with a second protrusion 166, and the second protrusion 166 is provided with a second snap-fit ​​groove (not shown). The second snap-fit ​​groove is opened at one end in the circumferential direction of the valve cover 16. The outer circumferential surface of the peripheral wall 152 is provided with a third rib 153, which can be fitted into the second snap-fit ​​groove.

[0082] Specifically, the arrangement of the second protrusion 166 on the inner circumferential surface of the valve cover 16 can be referenced to the arrangement of the first protrusion 1521 on the outer circumferential surface of the peripheral wall 152. The arrangement of the second snap-fit ​​groove on the second protrusion can be referenced to the arrangement of the first snap-fit ​​groove 1522 on the first protrusion 1521. The arrangement of the third rib 153 on the peripheral wall 152 can be referenced to the arrangement of the first rib 161 on the inner circumferential surface of the valve cover 16. Therefore, the arrangement of the second protrusion 166, the second snap-fit ​​groove, and the third rib 153 will not be described in detail here.

[0083] Optionally, such as Figure 3 and Figure 9 As shown, the pressure relief valve 1 also includes a bracket 17 and a valve core 18. The bracket 17 is disposed within the space enclosed by the valve cover 16 and the mounting portion 15, ensuring that the bracket 17 is securely installed. The air inlet 11 includes a first air inlet section 111 and a second air inlet section 112. The first air inlet section 111 is disposed on the bottom wall 151 and located inside the peripheral wall 152. The second air inlet section 112 is disposed at the bottom of the bracket 17. The valve core 18 is disposed within the bracket 17 to open and close the second air inlet section 112. The second air inlet section 112 communicates with the exhaust port 12.

[0084] Specifically, the first air intake section 111 and the second air intake section 112 are connected, and the central axis of the first air intake section 111 is collinear with the central axis of the second air intake section 112. The valve core 18 is placed above the second air intake section 112. When the weight of the valve core 18 is greater than the steam pressure inside the cooking appliance 100, the valve core 18 is located at the top of the second air intake section 112 to close the second air intake section 112. When the steam pressure inside the cooking appliance 100 is greater than the weight of the valve core 18, the valve core 18 can be pushed open to open the second air intake section 112, thereby isolating or connecting the first air intake section 111 and the exhaust port 12. The operation is simple and easy to implement. Moreover, placing the valve core 18 on the bracket 17 can improve the stability of the valve core 18 and ensure the pressure relief efficiency.

[0085] Specifically, the valve core 18 can be a weighted ball.

[0086] Optionally, such as Figure 9 As shown, the bracket 17 includes a mating part 171 and an assembly part 172. The mating part 171 mates with the top surface of the bottom wall 151. The second air intake section 112 is located in the mating part 171 and extends through the mating part 171 in the vertical direction. The assembly part 172 is located on the top surface of the mating part 171. The valve core 18 is located within the space enclosed by the multiple assembly parts 172 and can move vertically relative to the assembly parts 172.

[0087] Specifically, the assembly part 172 has a receiving cavity, and the valve core 18 is disposed in the receiving cavity, making it difficult for the valve core 18 to detach from the bracket 17, improving the stability of the installation, and restricting the position of the valve core 18 on the bracket 17, ensuring the overlap of the valve core 18 and the air inlet 11 in the axial projection direction, and ensuring the sealing effect of the valve core 18 on the air inlet 11. Moreover, the mating part 171 and the top surface of the bottom wall 151 are mated, which improves the fit between the bracket 17 and the mounting part 15.

[0088] Optionally, the assembly part 172 is provided with a through groove 174, which penetrates the wall thickness of the assembly part 172 and connects the air inlet 11 and the exhaust port 12.

[0089] Specifically, there are multiple through slots 174, which are arranged at intervals along the circumference of the mating part 171. This divides the assembly part 172 into multiple parts arranged at intervals along the circumference of the mating part 171, which facilitates the discharge of steam from the air inlet 11 through the through slots 174 to the exhaust port 12, thereby increasing the flow area of ​​the discharged steam and improving the pressure relief efficiency.

[0090] There are multiple vent holes 12, which are arranged at intervals along the circumference of the valve cover 16 and connected to the through groove 174 to facilitate steam discharge and improve pressure relief efficiency.

[0091] Specifically, the top surface of the assembly part 172 is higher than the top surface of the peripheral wall 152, and the bottom surface of the valve cover 16 has an upwardly recessed recess 163. The upper end of the assembly part 172 is interference-fitted within the recess 163, and the vent hole 12 is provided on the outer peripheral side of the recess 163. The inner peripheral surface of the recess 163 has a limiting rib 164, which abuts against the outer peripheral surface of the assembly part 172 to limit the assembly part 172.

[0092] Optionally, such as Figure 9 As shown, the bracket 17 also includes a limiting block 173, which is located inside the assembly part 172. The limiting block 173 is arranged inwardly in a top-to-bottom direction to limit the valve core 18.

[0093] Specifically, there are multiple limiting blocks 173, and each limiting block 173 corresponds to a multiple assembly part 172. The limiting blocks 173 further restrict the position of the valve core 18 on the bracket 17, further ensuring the overlap of the valve core 18 and the air inlet 11 in the axial projection direction, ensuring the sealing effect of the valve core 18 on the air inlet 11. Moreover, the inclined arrangement of the limiting blocks 173 can facilitate the guidance of the valve core 18 to fall under the action of gravity after the pressure is released to close the air inlet 11.

[0094] Optionally, such as Figure 3 As shown, the seal 2 includes an annular ring 21, a first sealing section 22, and a second sealing section 23. The annular ring 21 is disposed in the first air intake section 111. The first sealing section 22 extends outward from the top of the annular ring 21 and is located between the bottom wall 151 and the bottom surface of the bracket 17. The second sealing section 23 extends outward from the bottom of the annular ring 21 and is located below the bottom wall 151. At least a portion of the second sealing section 23 is arranged opposite to the through hole 13 in the vertical direction.

[0095] Specifically, the outer periphery of both the first sealing section 22 and the second sealing section 23 is circular, and the diameter of the first sealing section 22 is smaller than the diameter of the second sealing section 23. The first sealing section 22 is located inside the peripheral wall 152. By setting the first sealing section 22, the sealing performance between the bottom wall 151 and the bottom surface of the support 17 is improved, making it difficult for steam in the chamber 5 to escape from between the bottom wall 151 and the bottom surface of the support 17. The second sealing section 23 is arranged opposite to the through hole 13 in the vertical direction, so that the second sealing section 23 can easily close or open the through hole 13 under the action of steam pressure in the chamber 5 and external gas. Thus, the sealing effect is further guaranteed by the sealing element 2 of the above form.

[0096] Specifically, the gap between the second sealing section 23 and the bottom wall 151 is C2, where C2 > 0, and preferably 1 mm ≤ C2 ≤ 3 mm.

[0097] Specifically, during cooking, such as Figure 10As shown, the steam pressure inside chamber 5 is greater than that outside. Under the action of steam pressure, the second sealing section 23 fits against the bottom wall 151 to block the through hole 13. The steam inside chamber 5 can be discharged through the air inlet 11.

[0098] When cooking is finished, such as Figure 11 As shown, a negative pressure is formed in the chamber 5 due to the rapid condensation of water vapor. At this time, the steam pressure in the chamber 5 is less than that in the outside. The second sealing section 23 is squeezed open by the excessive external pressure, and outside air flows into the chamber 5, thus preventing the excessive negative pressure from squeezing and deforming or even damaging the top of the cooking utensil 100.

[0099] Specifically, the second sealing section 23 is elastic. After the air pressure inside and outside the chamber 5 is balanced, the second sealing section 23 can restore its elasticity to seal the through hole 13, so as to ensure the pressure inside the chamber 5 and ensure cooking efficiency when cooking is started.

[0100] like Figure 1 and Figure 2 As shown, the cooking appliance of this utility model embodiment includes a pot body 3, a pot lid 4 and a pressure relief valve assembly 200. The pot lid 4 is located at the top of the pot body 3, and the pressure relief valve assembly 200 is located at the top of the pot lid 4.

[0101] In this embodiment of the invention, the steam inside the pot body 3 can be discharged through the pressure relief valve assembly 200, and the pressure relief method is simple, ensuring that the pot lid 4 is not easily squeezed and deformed, thus extending the service life of the cooking appliance 100.

[0102] It is understandable that the mounting part 15 of the pressure relief valve assembly 200 can be part of the pot lid 4, ensuring the firmness of the pressure relief valve assembly 200 on the pot lid 4, and is easy to manufacture, reducing costs.

[0103] In some embodiments, the top of the pot body 3 is provided with a condensate buffer section 6. The condensate in the pressure relief valve 1 is guided to the outer periphery of the pressure relief valve 1 through the drain component 14 and then flows into the condensate buffer section 6 through the upper surface of the pot lid 4. It then flows into the chamber 5 of the cooking appliance through the gap between the pot body 3 and the pot lid 4, which improves the water recycling rate and has an energy-saving effect.

[0104] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0107] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0108] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0109] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A pressure relief valve assembly, characterized in that, include: A pressure relief valve (1) is provided on the top of a cooking appliance (100). The pressure relief valve (1) has an air inlet (11) and an exhaust port (12). The air inlet (11) is used to communicate with the chamber (5) of the cooking appliance (100). The air inlet (11) can be opened to communicate with the exhaust port (12) when the steam pressure in the chamber (5) reaches a threshold. The pressure relief valve (1) also has a through hole (13) and a drain component (14). The through hole (13) is used to communicate with the chamber (5) and the outside. The drain component (14) is arranged at intervals from the through hole (13). The drain component (14) is used to guide the condensate in the pressure relief valve (1) to the outer periphery of the pressure relief valve (1). A sealing element (2) is provided at the bottom of the pressure relief valve (1). At least a portion of the sealing element (2) can close the through hole (13) under the action of the steam pressure in the chamber (5) and open the through hole (13) when the external pressure is greater than the pressure in the chamber (5).

2. The pressure relief valve assembly according to claim 1, characterized in that, The pressure relief valve (1) includes a mounting part (15), and the drainage component (14) is disposed on the mounting part (15). The mounting part (15) includes a bottom wall (151) and a peripheral wall (152). The peripheral wall (152) is disposed on the top surface of the bottom wall (151) and extends circumferentially along the bottom wall (151). The peripheral wall (152) is located inside the outer periphery of the bottom wall (151) and spaced apart from the outer periphery of the bottom wall (151). At least a portion of the air inlet (11) is disposed on the bottom wall (151) and is located inside the peripheral wall (152). The through hole (13) is disposed on the bottom wall (151) and is located outside the peripheral wall (152).

3. The pressure relief valve assembly according to claim 2, characterized in that, The drainage component (14) includes a drainage channel (141) and at least two drainage baffles (142). The drainage channel (141) is located on the peripheral wall (152), and the drainage baffles (142) are located on the bottom wall (151) and on the outside of the peripheral wall (152). The drainage baffles (142) and the through hole (13) are arranged at intervals in the circumferential direction of the bottom wall (151). The gap between two adjacent drainage baffles (142) is arranged opposite to the drainage channel (141) in the inward and outward directions of the peripheral wall (152).

4. The pressure relief valve assembly according to claim 3, characterized in that, There are at least two drainage channels (141), and each drainage channel (141) corresponds to two adjacent drainage baffles (142).

5. The pressure relief valve assembly according to claim 2, characterized in that, The pressure relief valve (1) also includes a valve cover (16), which is rotatably disposed on the outer periphery of the peripheral wall (152), and the vent hole (12) is disposed on the valve cover (16).

6. The pressure relief valve assembly according to claim 5, characterized in that, The outer peripheral surface of the peripheral wall (152) is provided with a first protrusion (1521), the first protrusion (1521) is provided with a first snap-fit ​​groove (1522), the first snap-fit ​​groove (1522) is opened at one end of the peripheral wall (152) in the circumferential direction, and the inner peripheral surface of the valve cover (16) is provided with a first rib (161), the first rib (161) can be fitted into the first snap-fit ​​groove (1522).

7. The pressure relief valve assembly according to claim 6, characterized in that, There are at least two first protrusions (1521), and the at least two first protrusions (1521) are arranged at circumferential intervals along the peripheral wall (152). There are at least two first ribs (161), and the at least two first ribs (161) correspond one-to-one with the at least two first protrusions (1521).

8. The pressure relief valve assembly according to claim 6, characterized in that, The outer circumferential surface of the peripheral wall (152) is provided with a limiting part (1523). The limiting part (1523) and the first snap-fit ​​groove (1522) are arranged at intervals in the circumferential direction of the peripheral wall (152). The inner circumferential surface of the valve cover (16) has a second rib (162). The second rib (162) and the first rib (161) are arranged at intervals in the circumferential direction of the valve cover (16). The second rib (162) and the limiting part (1523) abut against each other in the circumferential direction of the peripheral wall (152).

9. The pressure relief valve assembly according to claim 8, characterized in that, The bottom surface of the valve cover (16) is provided with a groove (165), the groove (165) being located on at least one side of the second rib (162) in the circumferential direction of the valve cover (16); and / or, There are at least two limiting parts (1523), and the at least two limiting parts (1523) are arranged at intervals along the circumferential direction of the peripheral wall (152). There are at least two second protruding ribs (162), and the at least two second protruding ribs (162) correspond one-to-one with the at least two limiting parts (1523).

10. The pressure relief valve assembly according to claim 5, characterized in that, The valve cover (16) has a second protrusion (166) on its inner circumferential surface. The second protrusion (166) has a second snap-fit ​​groove. The second snap-fit ​​groove is opened at one end of the valve cover (16) in the circumferential direction. The outer circumferential surface of the peripheral wall (152) has a third rib (153). The third rib (153) can be fitted into the second snap-fit ​​groove.

11. The pressure relief valve assembly according to claim 5, characterized in that, The pressure relief valve (1) further includes a bracket (17) and a valve core (18). The bracket (17) is located in the space enclosed by the valve cover (16) and the mounting part (15). The air inlet (11) includes a first air inlet section (111) located on the bottom wall (151) and inside the peripheral wall (152) and a second air inlet section (112) located at the bottom of the bracket (17). The valve core (18) is located in the bracket (17) to open and close the second air inlet section (112). The second air inlet section (112) communicates with the exhaust port (12).

12. The pressure relief valve assembly according to claim 11, characterized in that, The bracket (17) includes a mating part (171) and an assembly part (172). The mating part (171) mates with the top surface of the bottom wall (151). The second air intake section (112) is provided in the mating part (171) and penetrates the mating part (171) in the vertical direction. The assembly part (172) is provided on the top surface of the mating part (171). The valve core (18) is provided in the assembly part (172) and can move up and down relative to the assembly part (172).

13. The valve assembly according to claim 12, characterized in that, The assembly part (172) is provided with a through groove (174), the through groove (174) penetrating the wall thickness of the assembly part (172), and the through groove (174) connecting the air inlet (11) and the exhaust port (12); and / or, The bracket (17) also includes a limiting block (173), which is located inside the assembly part (172). The limiting block (173) is arranged inwardly in a top-to-bottom direction to limit the valve core (18).

14. The pressure relief valve assembly according to claim 11, characterized in that, The seal (2) includes: An annular ring (21) is provided in the first air intake section (111); The first sealing section (22) extends outward from the top of the annular ring (21) and is located between the bottom wall (151) and the bottom surface of the bracket (17); The second sealing section (23) extends outward from the bottom end of the annular ring (21) and is located below the bottom wall (151). At least a portion of the second sealing section (23) is arranged opposite to the through hole (13) in the vertical direction.

15. A cooking utensil, characterized in that, include: Pot body (3); A lid (4) is located at the top of the pot body (3); A pressure relief valve assembly (200) is disposed on the top of the pot lid (4), and the pressure relief valve assembly (200) is the pressure relief valve assembly (200) according to any one of claims 1-14.

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