Pressure limiting valve and cooking appliance

Abstract

The present invention provides a pressure limiting valve and a cooking utensil. The pressure limiting valve includes: a valve seat, on which an air inlet hole is arranged; a valve cover, which is buckled and covered on the valve seat and surrounded by the valve seat to form a cavity, and at least two mounting holes are arranged on the top of the valve cover, and the mounting holes are connected to the cavity; a float valve, at least two float valves are installed in the at least two mounting holes in a one-to-one correspondence, and an exhaust channel is arranged on the float valve, and the float valve has a sealing position for blocking the mounting holes and an exhaust position for connecting the exhaust channel with the cavity, and the float valve floats up and down along the axial direction of the mounting hole to switch between the sealing position and the exhaust position. Since there are more than two float valves in the present invention, each float valve is provided with an exhaust channel, and the cooking utensil is exhausted simultaneously through multiple exhaust channels, so that the cold air inside the cooking utensil can be quickly discharged, thereby effectively reducing the residual cold air in the cooking utensil, and facilitating the improvement of the cooking efficiency of the cooking utensil in the present invention.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a pressure limiting valve and a cooking utensil. Background Art

[0002] The electric pressure cooker is an upgraded product of the traditional pressure cooker and rice cooker. It combines the advantages of pressure cookers and rice cookers, completely solves the safety problems of pressure cookers, and eliminates the safety hazards of ordinary pressure cookers that have troubled consumers for many years. Its thermal efficiency is greater than 80%, saving time and electricity.

[0003] The existing pressure limiting valve can only seal the exhaust nozzle and keep the pressure in the pot below the working pressure. However, after the electric pressure cooker is started with a cold pot, the stop valve floats up, and the stop valve and the pressure limiting valve seal the pot. The remaining cold air is not completely discharged, affecting the cooking effect. During the cooking process, the pressure limiting valve will not move as long as the pressure in the pot does not exceed the working pressure. For example, cooking rice does not require such a high pressure, but requires high heat. The existing separate electric pressure cooker cannot cook elastic and sticky rice well. Summary of the invention

[0004] The main purpose of the present invention is to provide a pressure limiting valve and a cooking utensil to solve the problem that the pressure limiting valve of the cooking utensil is difficult to completely discharge the cold air in the cooking utensil.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, a pressure limiting valve is provided, comprising: a valve seat, on which an air inlet hole is arranged; a valve cover, on which the valve cover is buckled and covers the valve seat to form a cavity, at least two mounting holes are arranged on the top of the valve cover, and the mounting holes are connected to the cavity; a float valve, at least two of the float valves are mounted in at least two mounting holes in a one-to-one correspondence, an exhaust channel is arranged on the float valve, the float valve has a sealing position for blocking the mounting holes and an exhaust position for connecting the exhaust channel with the cavity, and the float valve floats up and down along the axial direction of the mounting hole to switch between the sealing position and the exhaust position. When the cooking appliance starts to work, the float valve is in the exhaust position, and the cold air inside the cooking appliance can enter the cavity from the air inlet, enter the exhaust channel on the float valve from the cavity, and finally be discharged to the outside of the cooking appliance. Since there are more than two float valves in the present invention, each float valve is provided with an exhaust channel. The cooking appliance can be exhausted simultaneously through multiple exhaust channels, so that the cold air inside the cooking appliance can be quickly discharged, thereby effectively reducing the residual cold air in the cooking appliance, thereby facilitating improving the cooking efficiency of the cooking appliance in the present invention.

[0006] Furthermore, the float valve comprises: a valve body, the exhaust passage is arranged on the valve body, and the inlet end of the exhaust passage is located on the side wall of the valve body; a sealing ring, the sealing ring is sleeved on the bottom end of the valve body, and the outer diameter of the sealing ring is larger than the inner diameter of the mounting hole, and the inlet end of the exhaust passage is higher than the sealing ring. In the initial state, the float valve is naturally placed in the mounting hole under the action of gravity, and the exhaust passage is connected with the cavity at this time, which is convenient for discharging cold air when the cooking appliance just starts to work.

[0007] As the cooking utensil is continuously heated, the pressure inside the cooking utensil continues to rise, and the pressure in the cavity also continues to rise, which can cause the float valve to rise along the mounting hole, and the inlet end of the exhaust passage also continues to rise until the sealing ring blocks and seals the mounting hole, and the exhaust passage and the cavity are disconnected. At this time, the food inside the cooking utensil is in a relatively sealed state, which is convenient for quick cooking of the food.

[0008] Furthermore, the valve body includes: a first cylindrical section, which is inserted into the mounting hole; a second cylindrical section, which is coaxially arranged with the first cylindrical section, and is located at the top of the first cylindrical section, and the outer diameter of the second cylindrical section is larger than the inner diameter of the mounting hole and the outer diameter of the first cylindrical section, so that the entire valve body is arranged in a T shape, and the second cylindrical section can prevent the float valve from falling into the cavity.

[0009] Furthermore, a blind hole sunken downward is provided on the top of the valve body, and a connecting hole is also provided on the valve body, and the connecting hole extends from the side wall of the valve body to the blind hole, and the blind hole and the connecting hole form the exhaust channel. In actual processing, the blind hole can be processed along the axis of the valve body, and then the connecting hole can be processed from the outer peripheral side wall of the valve body to form the exhaust channel, which is convenient for reducing the production cost of the pressure limiting valve in the present invention.

[0010] Furthermore, there are a plurality of connecting holes, and the plurality of connecting holes are arranged at intervals along the outer circumference of the blind hole, so as to facilitate rapid exhaust.

[0011] Furthermore, there are two float valves, and the masses of the two float valves are different. In actual operation, the float valve with a lower weight first floats upward, and then the float valve with a higher weight floats upward, which is convenient for continuous gas discharge and complete discharge of cold air inside the cooking appliance to the outside of the cooking appliance.

[0012] Furthermore, the pressure limiting valve also includes: an exhaust pipe, which is detachably installed at the air inlet hole to facilitate the connection between the air inlet hole of the pressure limiting valve and the inner pot of the cooking appliance.

[0013] Furthermore, the air inlet includes: a first hole segment; a second hole segment, the second hole segment is located at the bottom end of the first hole segment, and the inner diameter of the second hole segment is larger than the inner diameter of the first hole segment; the pressure limiting valve also includes: a sealing gasket, the sealing gasket is fixed on the top of the second hole segment, and the sealing gasket is provided with a through hole corresponding to the first hole segment. When the exhaust pipe is installed on the pot cover assembly of the cooking utensil, the valve seat is pressed on the top of the exhaust pipe, and under the action of the gravity of the valve seat, the sealing gasket can be pressed on the top of the exhaust pipe, so as to achieve the sealing of the gap between the air inlet and the exhaust pipe, so as to facilitate the rapid pressure increase of the cooking utensil.

[0014] Furthermore, the air inlet hole also includes: a third hole segment, the third hole segment is located at the bottom end of the second hole segment, and the inner diameter of the third hole segment is smaller than the inner diameter of the second hole segment, and a groove is provided on the inner wall of the third hole segment; a protrusion corresponding to the groove is provided on the outer wall surface of the exhaust pipe.

[0015] Furthermore, there are multiple grooves and multiple protrusions, and the multiple grooves are arranged in one-to-one correspondence with the multiple protrusions, so the structure is more stable and the grooves can be quickly aligned, which facilitates the rapid assembly of the exhaust pipe and the valve seat.

[0016] Furthermore, the plurality of protrusions are arranged at intervals along the same circumference. In actual processing, the exhaust pipe only needs to be clamped once, and multiple protrusions can be processed at one time by processing along the circumference of the exhaust pipe, thereby reducing the production cost of the pressure limiting valve in the present invention.

[0017] Furthermore, the valve cover and the valve seat are fixed together by threaded connection, which has a simple structure and is easy to disassemble and assemble to clean the pressure-limiting valve.

[0018] According to another aspect of the present invention, a cooking appliance is provided, comprising a limit valve, wherein the pressure limiting valve is the above-mentioned pressure limiting valve.

[0019] By applying the technical solution of the present invention, since there are more than two float valves in the present invention, each float valve is provided with an exhaust channel. The cooking appliance can be exhausted through multiple exhaust channels at the same time, so that the cold air inside the cooking appliance can be quickly discharged, thereby effectively reducing the residual cold air in the cooking appliance, which is convenient for improving the cooking efficiency of the cooking appliance in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A cross-sectional view schematically shows a float valve of the pressure limiting valve of the present invention when it is in an exhaust position;

[0022] Figure 2 A cross-sectional view schematically shows a float valve of the pressure limiting valve of the present invention when it is in a sealing position;

[0023] Figure 3 Schematically shows an exploded cross-sectional view of the pressure limiting valve of the present invention;

[0024] Figure 4 The diagram schematically shows the flow direction of the airflow when the pressure limiting valve of the present invention is in the exhaust position;

[0025] Figure 5 The diagram schematically shows the airflow direction at the valve seat of the present invention;

[0026] Figure 6 The diagram schematically shows the airflow direction when the float valve of the invention is in the exhaust position;

[0027] Figure 7 A top view of a valve cover of the present invention is schematically shown;

[0028] Figure 8 Schematically shows a front view of the exhaust pipe of the present invention;

[0029] Fig. 9 The diagram schematically shows the position relationship between the exhaust pipe and the sealing gasket when the pressure limiting valve of the present invention is in a pressure relief state.

[0030] The above drawings include the following reference numerals:

[0031] 10. Valve seat; 11. Air inlet; 111. First hole section; 112. Second hole section; 113. Third hole section; 114. Groove; 20. Valve cover; 21. Mounting hole; 22. Cavity; 30. Float valve; 31. Valve body; 311. Blind hole; 312. Connecting hole; 313. First cylindrical section; 3131. Round groove; 314. Second cylindrical section; 32. Sealing ring; 40. Exhaust pipe; 41. Bump; 50. Sealing pad; 51. Through hole. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0035] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, a cooking utensil is provided. The cooking utensil in this embodiment particularly refers to an electric pressure cooker.

[0036] The electric pressure cooker in this embodiment includes a cooker body (not shown in the figure) and a cooker cover assembly (not shown in the figure) arranged on the cooker body. In order to facilitate the discharge of cold air inside the cooker body, a pressure limiting valve is arranged on the cooker cover assembly in this embodiment. Through the function of the pressure limiting valve, on the one hand, it is convenient to discharge the cold air in the cooker body to the outside of the cooking utensil, and on the other hand, it is also convenient to perform sealing and pressure limiting operations on the cooking utensil.

[0037] See also Figures 1 to 3 As shown, the pressure limiting valve in this embodiment includes a valve seat 10 , a valve cover 20 , a float valve 30 and an exhaust pipe 40 .

[0038] Among them, an air inlet hole 11 is provided on the valve seat 10, and the exhaust pipe 40 is detachably installed at the air inlet hole 11; the valve cover 20 is buckled on the valve seat 10 and is surrounded by the valve seat 10 to form a cavity 22, and at least two mounting holes 21 are provided on the top of the valve cover 20, and the mounting holes 21 are connected with the cavity 22; at least two float valves 30 are installed in the at least two mounting holes 21 in a one-to-one correspondence, and the float valve 30 has a sealing position for blocking the mounting hole 21 and an exhaust position for connecting the exhaust channel with the cavity 22.

[0039] In actual use, the exhaust pipe 40 in this embodiment is installed at the exhaust through hole on the pot cover assembly, and the float valve 30 floats up and down along the axial direction of the installation hole 21 to switch between the sealing position and the exhaust position.

[0040] When the cooking appliance starts to work, the float valve 30 is in the exhaust position (eg Figure 1 As shown in FIG. 1 , the cold air inside the cooking appliance can enter the air inlet 11 from the exhaust pipe 40, then enter the cavity 22, enter the exhaust channel on the float valve 30 from the cavity 22, and finally be discharged to the outside of the cooking appliance. Since there are more than two float valves 30 in this embodiment, each float valve 30 is provided with an exhaust channel, and the cooking appliance is exhausted through multiple exhaust channels at the same time, the cold air inside the cooking appliance can be quickly discharged, thereby effectively reducing the residual cold air in the cooking appliance, which is convenient for improving the cooking efficiency of the cooking appliance in this embodiment.

[0041] After the cooking appliance has been working for a period of time, the pressure inside the cooking appliance continues to increase, and the steam in the cooking appliance continuously enters the cavity 22 from the exhaust pipe 40. When the steam pressure in the cavity 22 is greater than the gravity of the float valve 30, the float valve 30 can float upward, and the float valve 30 is switched from the exhaust position to the sealing position, so that the food inside the cooking appliance is in a relatively closed environment, which is convenient for quick cooking of the food inside the cooking appliance.

[0042] When the cooking utensil has been cooking for a period of time, the pressure relief button on the cooking utensil can be used to drive the pressure relief mechanism to relieve the pressure on the pressure limiting valve. Specifically, the valve seat 10 can be lifted up by the pressure relief mechanism to allow the air flow to flow out from the gap between the exhaust pipe 40 and the air inlet 11. During this process, the pressure in the cavity 22 continues to decrease, and the float valve 30 moves downward under the action of gravity. The air flow can simultaneously enter the exhaust channel on the float valve 30 from the cavity 22 and be discharged to the outside of the cooking utensil. The operation is simple and the pressure relief is fast.

[0043] At the same time, the cooking utensil in this embodiment can also be manually depressurized. When manually relieving pressure, it is only necessary to manually lift the valve seat 10 and the valve cover 20. At this time, the airflow inside the cooking utensil can flow out from the gap between the exhaust pipe 40 and the air inlet 11, and the exhaust channel on the float valve 30 is discharged to the outside of the cooking utensil at the same time. The operation is simple and the pressure relief is fast.

[0044] See also Figures 1 to 7 As shown, the float valve 30 in this embodiment includes a valve body 31 and a sealing ring 32 .

[0045] In actual design, the exhaust channel is arranged on the valve body 31 , and the inlet end of the exhaust channel is located on the side wall of the valve body 31 and higher than the sealing ring 32 ; the sealing ring 32 is sleeved on the bottom end of the valve body 31 , and the outer diameter of the sealing ring 32 is larger than the inner diameter of the mounting hole 21 .

[0046] In this embodiment, the inlet end of the exhaust passage is higher than the sealing ring 32, which means that when the pressure limiting valve is installed on the pot cover assembly, the inlet end of the exhaust passage is located above the sealing ring 32 along the height direction of the cooking utensil. Figures 1 to 4 ,as well as Figure 6 shown.

[0047] In the initial state, the float valve 30 is naturally placed in the mounting hole 21 under the action of gravity. At this time, the exhaust passage is connected with the cavity 22, so as to facilitate the discharge of cold air when the cooking appliance just starts to work.

[0048] As the cooking utensil is continuously heated, the pressure inside the cooking utensil continues to rise, and the pressure inside the cavity 22 also continues to rise, which can cause the float valve 30 to rise along the mounting hole 21, and the inlet end of the exhaust passage also continues to rise until the sealing ring 32 blocks and seals the mounting hole 21, and the exhaust passage and the cavity 22 are disconnected. At this time, the food inside the cooking utensil is in a relatively sealed state, which is convenient for quick cooking of the food.

[0049] Preferably, the sealing ring 32 in this embodiment is a silicone ring with a simple structure and a long service life.

[0050] like Figure 6 As shown, the valve body 31 in this embodiment includes a first cylindrical section 313 and a second cylindrical section 314 .

[0051] Among them, the first cylindrical section 313 is inserted into the installation hole 21, and the sealing ring 32 is installed at the bottom end of the first cylindrical section 313. During actual installation, a circular groove 3131 is provided at the bottom end of the first cylindrical section 313, and the sealing ring 32 is sleeved in the circular groove 3131. The structure is simple and easy to install.

[0052] The second cylindrical section 314 is coaxially arranged with the first cylindrical section 313, and the second cylindrical section 314 is located at the top of the first cylindrical section 313. The outer diameter of the second cylindrical section 314 is larger than the inner diameter of the mounting hole 21 and the outer diameter of the first cylindrical section 313, so that the entire valve body 31 is arranged in a T-shape. The second cylindrical section 314 can prevent the float valve 30 from falling into the cavity 22. It can be seen that the float valve 30 in this embodiment can float up and down in the mounting hole 21 to switch between the exhaust position and the sealing position through the action of the second cylindrical section 314 and the sealing ring 32, and the structure is simple, stable and reliable.

[0053] Of course, in other embodiments of the invention, the first cylindrical section 313 and the second cylindrical section 314 can also be set as prisms, or other special-shaped columns. As long as they can prevent the valve body 31 from falling into the cavity 22, other deformation modes are within the protection scope of the present invention.

[0054] In order to facilitate processing, the top of the valve body 31 in this embodiment is provided with a downwardly recessed blind hole 311, and the valve body 31 is also provided with a connecting hole 312, which extends from the side wall of the valve body 31 to the blind hole 311, and an exhaust passage is formed by connecting the connecting hole 312 and the blind hole 311, and the port of the connecting hole 312 located on the side wall of the valve body 31 is higher than the sealing ring 32. In actual processing, the blind hole 311 can be processed along the axis of the valve body 31, and then the connecting hole 312 can be processed from the outer peripheral side wall of the valve body 31 to form an exhaust passage, which is convenient for reducing the production cost of the pressure limiting valve in this embodiment.

[0055] In this embodiment, the connecting hole 312 can be arranged in a direction perpendicular to the axis of the valve body 31 , or in a direction inclined to the axis of the valve body 31 .

[0056] Preferably, there are a plurality of connection holes 312 in this embodiment, and the plurality of connection holes 312 are arranged at intervals along the outer circumference of the blind hole 311 to facilitate rapid exhaust.

[0057] Further preferably, in this embodiment, there are two connecting holes 312, which can achieve rapid exhaust and enable the cooking appliance to be pressurized rapidly, thereby avoiding the situation where too many connecting holes 312 are provided, causing the cooking appliance to be pressurized too slowly.

[0058] Further, see again Figures 1 to 7 As shown, there are two float valves 30 in this embodiment, and the masses of the two float valves 30 are different. In actual operation, the float valve 30 with a lower weight floats up first, and then the float valve 30 with a higher weight floats up, which is convenient for continuous gas discharge and complete discharge of the cold air inside the cooking appliance to the outside of the cooking appliance.

[0059] It can be seen that since the two float valves 30 have different weights, such as one float valve 30 weighs 1 gram and the other weighs 2 grams, in the exhaust stage, that is, before the pressure is applied, the light float valve 30 floats up first and then the heavy float valve 30 floats up. The two float valves 30 float up at different stages, which can exhaust the cold air inside the electric pressure cooker as much as possible, making the cooking effect more ideal.

[0060] Combination Figures 1 to 9As shown, the air inlet 11 in this embodiment includes a first hole segment 111, a second hole segment 112 and a third hole segment 113, wherein the second hole segment 112 is located at the bottom end of the first hole segment 111, and the inner diameter of the second hole segment 112 is greater than the inner diameter of the first hole segment 111. The pressure limiting valve also includes a sealing gasket 50, which is fixed on the top of the second hole segment 112 and is provided with a through hole 51 corresponding to the first hole segment 111.

[0061] When the exhaust pipe 40 is installed on the pot cover assembly of the cooking utensil, the valve seat 10 is pressed on the top of the exhaust pipe 40. Under the gravity of the valve seat 10, the sealing gasket 50 can be pressed on the top of the exhaust pipe 40, so as to seal the gap between the air inlet 11 and the exhaust pipe 40, so as to facilitate the rapid pressure increase of the cooking utensil. Preferably, the sealing gasket 50 in this embodiment is a silicone gasket.

[0062] The third hole section 113 is located at the bottom end of the second hole section 112 , and the inner diameter of the third hole section 113 is smaller than the inner diameter of the second hole section 112 . A groove 114 is provided on the inner wall of the third hole section 113 ; correspondingly, a protrusion 41 corresponding to the groove 114 is provided on the outer wall surface of the exhaust pipe 40 .

[0063] During actual disassembly and assembly, the protrusion 41 on the exhaust pipe 40 is aligned with the groove 114 on the third hole section 113, so that the exhaust pipe can be inserted into the installation hole 21. After installation, the protrusion 41 and the groove 114 are misaligned in the axial direction, so that the valve seat 10 and the exhaust pipe 40 can be assembled together to prevent the valve seat 10 from separating from the exhaust pipe 40 and falling off.

[0064] Preferably, there are multiple grooves 114 and multiple protrusions 41 in this embodiment, and the multiple grooves 114 are arranged in a one-to-one correspondence with the multiple protrusions 41, which makes the structure more stable and enables the grooves 114 to be quickly aligned with the grooves 114, thereby facilitating the rapid assembly of the exhaust pipe 40 and the valve seat 10.

[0065] Furthermore, the plurality of protrusions 41 are arranged at intervals along the same circumference. During actual processing, the exhaust pipe 40 only needs to be clamped once, and the plurality of protrusions 41 can be processed at one time by processing along the circumference of the exhaust pipe 40, thereby reducing the production cost of the pressure limiting valve in this embodiment.

[0066] In other embodiments of the present invention, the groove 114 may be disposed on the exhaust pipe 40 , and the protrusion 41 may be correspondingly disposed on the inner wall of the third hole section 113 .

[0067] In order to further stably connect the exhaust pipe 40 and the valve seat 10 together, the pressure limiting valve in this embodiment also includes an elastic clip (not shown in the figure), which is fixed on the side wall of the exhaust pipe 40. When the exhaust pipe 40 is just inserted into the third hole section 113, the elastic clip is compressed. When the exhaust pipe 40 enters the mounting hole 21, the elastic clip is reset and locked on the inner wall surface of the mounting hole 21 to prevent the valve seat 10 from separating from the exhaust pipe 40 and falling off.

[0068] During actual assembly, the valve cover 20 and the valve seat 10 in this embodiment are fixed together by threaded connection, which has a simple structure and is easy to disassemble and assemble for cleaning the pressure limiting valve.

[0069] Of course, in other embodiments of the present invention, the valve cover 20 and the valve seat 10 may be fixedly connected together by welding. As long as they are other deformation methods based on the concept of the present invention, they are within the protection scope of the present invention.

[0070] According to the above-mentioned embodiments, the present invention reduces the fine processing of the pressure limiting valve float valve 30 and the exhaust pipe 40, so that the pressure limiting valve can perform a dual-stage control exhaust structure. After one float valve 30 of the pressure limiting valve on the pot cover assembly floats up, the remaining float valves 30 are used to exhaust the remaining cold air in the pot. That is, the pressure in the pot may be regulated before the maximum working pressure is reached. This is a physical structure that can be adjusted by gravity without being controlled by electrical appliances.

[0071] In the pre-pressurization stage of the electric pressure cooker, the valve seat 10 of the pressure limiting valve is placed on the upper end of the exhaust pipe 40 outlet. The valve seat 10 has a sealing gasket 50, which can seal the exhaust pipe 40 outlet, allowing the internal gas of the electric pressure cooker to be introduced from the exhaust pipe 40 into the valve cover 20 and discharged from the exhaust channel of the float valve 30. The inflow and outflow can make the air flow carry the float valve 30 to float upward. After the float valve 30 floats, the sealing ring 32 abuts against the mounting hole 21 on the valve cover 20 to seal the internal gas. The two float valves 30 have different weights. The light float valve 30 floats first and then the heavy one. Such floating at different stages can make the cold air inside the electric pressure cooker be exhausted as much as possible, making the cooking effect more ideal.

[0072] When the electric pressure cooker is pressurized, the float valve 30 has floated up, the sealing ring 32 is also sealed, and the air pressure inside the entire pressure limiting valve is consistent with the air pressure in the inner pot. After the cooking process is completed, there is pressure inside the electric pressure cooker. The entire process is sealed, and the gas has no place to flow out. Manual exhaust is required for rapid exhaust. The pot cover assembly has exhaust buttons and other components that can lift up one end of the bottom of the pressure limiting valve seat 10, and half of the area of ​​the exhaust pipe 40 outlet is separated from the sealing pad 50 (such as Fig. 9As shown, it can be directly seen from the cross section that the sealing gasket 50 and the exhaust port of the exhaust pipe 40 have a certain angle). The gas inside the electric pressure cooker is discharged in two parts, a small part enters the pressure limiting valve, the float valve 30 of the pressure limiting valve falls and is discharged from the exhaust channel of the float valve 30, and the largest part of the gas is discharged from the gap between the exhaust pipe 40 and the valve seat 10.

[0073] It can be seen that the cold air inside the cooking utensil in the present invention can be exhausted from the exhaust pipe 40 into the cavity 22, and the two float valves 30 are blown. The float valve 30 is a stop valve structure with an exhaust passage in the middle. The air from the exhaust pipe 40 blows up the float valve 30, and the float valve 30 floats up under the action of the airflow. The weights of the two float valves 30 are different, which can make the lighter one float up first and the heavier one float up last, thereby achieving the purpose of effectively exhausting the cold air in the cooking utensil.

[0074] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure limiting valve, characterized in that: include: A valve seat (10), wherein the valve seat (10) is provided with an air inlet hole (11); A valve cover (20), the valve cover (20) is buckled onto the valve seat (10) and is surrounded by the valve seat (10) to form a cavity (22), and at least two mounting holes (21) are arranged on the top of the valve cover (20), and the mounting holes (21) are communicated with the cavity (22); A float valve (30), at least two of the float valves (30) are mounted in at least two of the mounting holes (21) in a one-to-one correspondence, an exhaust channel is provided on the float valve (30), the float valve (30) has a sealing position for blocking the mounting hole (21) and an exhaust position for connecting the exhaust channel with the cavity (22), and the float valve (30) floats up and down along the axial direction of the mounting hole (21) to switch between the sealing position and the exhaust position; The exhaust passages of at least two of the float valves (30) are capable of exhausting cold air from the interior of the cooking utensil. When the steam pressure in the cavity (22) is greater than the gravity of the float valve (30), the float valve (30) can float upward, and the float valve (30) can be switched from the exhaust position to the sealing position. When the pressure in the cavity (22) decreases, the float valve (30) moves downward under the action of gravity, and airflow can enter the exhaust passage on the float valve (30) from the cavity (22) and be exhausted to the outside of the cooking utensil.

2. The pressure limiting valve according to claim 1, characterized in that: The float valve (30) comprises: A valve body (31), wherein the exhaust passage is arranged on the valve body (31), and an inlet end of the exhaust passage is located on a side wall surface of the valve body (31); A sealing ring (32), wherein the sealing ring (32) is sleeved on the bottom end of the valve body (31), and the outer diameter of the sealing ring (32) is greater than the inner diameter of the mounting hole (21), and the inlet end of the exhaust channel is higher than the sealing ring (32).

3. The pressure limiting valve according to claim 2, characterized in that: The valve body (31) comprises: A first cylindrical section (313), wherein the first cylindrical section (313) is inserted into the mounting hole (21); A second cylindrical section (314), wherein the second cylindrical section (314) is coaxially arranged with the first cylindrical section (313), the second cylindrical section (314) is located at the top end of the first cylindrical section (313), and the outer diameter of the second cylindrical section (314) is larger than the inner diameter of the mounting hole (21) and the outer diameter of the first cylindrical section (313).

4. The pressure limiting valve according to claim 2, characterized in that: The top of the valve body (31) is provided with a downwardly recessed blind hole (311), and the valve body (31) is also provided with a connecting hole (312), the connecting hole (312) extending from the side wall of the valve body (31) to the blind hole (311), and the blind hole (311) and the connecting hole (312) form the exhaust channel.

5. The pressure limiting valve according to claim 4, characterized in that: There are a plurality of connection holes (312), and the plurality of connection holes (312) are arranged at intervals along the outer circumference of the blind hole (311).

6. The pressure limiting valve according to claim 1, characterized in that: There are two float valves (30), and the two float valves (30) have different masses.

7. The pressure limiting valve according to claim 1, characterized in that: The pressure limiting valve also includes: An exhaust pipe (40) is detachably mounted on the air inlet (11).

8. The pressure limiting valve according to claim 7, characterized in that: The air inlet (11) comprises: A first hole section (111); a second hole section (112), the second hole section (112) being located at the bottom end of the first hole section (111), the inner diameter of the second hole section (112) being greater than the inner diameter of the first hole section (111); The pressure limiting valve also includes: A sealing gasket (50), the sealing gasket (50) being fixed on the top of the second hole segment (112), and the sealing gasket (50) being provided with a through hole (51) corresponding to the first hole segment (111).

9. The pressure limiting valve according to claim 8, characterized in that: The air inlet (11) further comprises: a third hole section (113), the third hole section (113) being located at the bottom end of the second hole section (112), the inner diameter of the third hole section (113) being smaller than the inner diameter of the second hole section (112), and a groove (114) being arranged on the inner wall of the third hole section (113); A protrusion (41) corresponding to the groove (114) is provided on the outer wall surface of the exhaust pipe (40).

10. The pressure limiting valve according to claim 9, characterized in that: There are multiple grooves (114) and multiple protrusions (41), and the multiple grooves (114) and the multiple protrusions (41) are arranged in a one-to-one correspondence.

11. The pressure limiting valve according to claim 10, characterized in that: The plurality of protrusions (41) are arranged at intervals along the same circumference.

12. The pressure limiting valve according to any one of claims 1 to 11, characterized in that The valve cover (20) and the valve seat (10) are fixed together by threaded connection.

13. A cooking appliance, comprising a limit valve, characterized in that: The pressure limiting valve is the pressure limiting valve according to any one of claims 1 to 12.

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