Steam discharge assembly, pressure cooker cover and pressure cooker

Abstract

The utility model provides a steam discharging assembly, a pressure cooker cover and a pressure cooker, the steam discharging assembly comprises an outer cover, the outer cover is of a cavity-shaped structure with an upward opening, a plurality of first filtering holes are formed in the bottom of the outer cover, and the airflow direction of the first filtering holes is parallel to the axis of the outer cover; the turbine is arranged in the outer cover and can rotate around the axis of the turbine, the axis of the turbine is parallel to the axis direction of the outer cover, and at least one part of the first filter holes are located within the diameter range of the turbine. According to the pressure cooker, the use safety and the cleanliness of the pressure cooker can be improved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliances technology, and in particular to a steam venting component, a pressure cooker lid, and a pressure cooker. Background Technology

[0002] A pressure cooker is a common cooking appliance. Its main function is to increase the heating temperature by increasing the pressure inside the pot, thereby increasing the heating speed. A pressure cooker mainly consists of a pressure cooker lid and a pot body. The pressure cooker lid and pot body are fixed together by fasteners or other means. The pressure cooker lid usually has a vent valve to release the pressure inside the pot.

[0003] In existing technologies, when cooking liquids containing particles, such as porridge, the liquid continuously churns in the pot, generating a large amount of foam. Small particles, such as food residue, enter the exhaust valve along with the foam or even overflow from the exhaust valve, which can cause blockage of the exhaust valve or contamination of the countertop, affecting the safety and hygiene of the pressure cooker. Utility Model Content

[0004] This application provides a steam venting component, a pressure cooker lid, and a pressure cooker to improve the safety and hygiene of pressure cookers.

[0005] The first aspect of this application provides a steam emission assembly, comprising:

[0006] The outer cover has an upward-opening cavity structure, and the bottom of the outer cover is provided with a plurality of first filter holes, the airflow direction of the first filter holes being parallel to the axis of the outer cover;

[0007] A turbine is disposed inside the outer casing and is capable of rotating about its own axis. The axis of the turbine is parallel to the axis of the outer casing. At least a portion of the first filter hole is located within the diameter range of the turbine.

[0008] The steam emission assembly provided in this application includes an outer casing and a turbine. The outer casing has an upward-opening cavity structure, and its bottom is provided with multiple first filter holes. The airflow direction of the first filter holes is parallel to the axis of the outer casing. The turbine is disposed inside the outer casing and can rotate around its own axis, which is parallel to the axis of the outer casing. At least a portion of the first filter holes is located within the diameter of the turbine. Steam enters the inner cavity of the outer casing along its natural upward direction and blows directly onto the turbine, which can fully and efficiently utilize the power of the steam. Moreover, the steam blows onto the turbine along its axial direction, forming an axial-flow turbine, which can reduce energy loss caused by abrupt changes in airflow direction and can more efficiently convert the steam flow into the rotational motion of the turbine. This can effectively increase the rotational speed of the turbine, thereby ensuring the separation of foam and small particles from the steam. In addition, the steam flows uniformly along the axial direction of the outer casing, and the liquid and small particles are uniformly thrown tangentially towards the sidewall of the outer casing, which can avoid interference between the movement paths of different substances and further ensure the separation of foam and small particles from the steam.

[0009] Optionally, the turbine is provided with a connecting hole that extends axially through both ends of the turbine; a connecting post is fixed inside the outer casing, extending axially along the outer casing, and a limiting flange protrudes from the outer periphery of the connecting post; the connecting post is inserted into the connecting hole, and the limiting flange protrudes above the connecting hole. The connecting post simultaneously provides radial and axial limiting for the turbine, allowing the turbine to rotate around the connecting post and ensuring that the turbine and the outer casing are connected as a whole, preventing the turbine from falling out of the outer casing and causing component loss.

[0010] Optionally, an annular first gap is provided between the outer wall of the connecting column and the wall of the connecting hole, the width of the first gap being 0.5mm to 1mm. The turbine can sway or move radially on the connecting column to a certain extent, which can both ensure stable turbine rotation and achieve a reliable separation effect, and also exert radial squeezing or collision on the connecting column, causing the outer casing to vibrate and shake off liquids or small particles thrown onto the side wall of the outer casing, achieving a reliable automatic cleaning effect.

[0011] Optionally, a second gap is provided between the lower surface of the limiting flange and the upper surface of the turbine, the height of the second gap being 0.5mm to 1mm. The turbine can move axially to a certain extent on the connecting column, which not only enables the turbine to rotate stably and achieve a reliable separation effect, but also exerts axial squeezing or collision on the connecting column, causing the outer casing to vibrate and shake off liquids or small particles thrown onto the side wall of the outer casing, achieving a reliable automatic cleaning effect.

[0012] Optionally, the connecting column is press-fitted to the bottom of the outer cover. On the one hand, press-fitting causes the materials to interlock through plastic deformation, forming a high-strength and reliable connection that remains stable even in a vibration environment; on the other hand, press-fitting completes the connection under normal pressure, eliminating the need for complex operations such as preheating, making the process simple and efficient, and less prone to causing abnormalities such as material deformation.

[0013] Optionally, the bottom of the outer cover includes: a first region, which is an annular planar plate structure, and the first filter hole is disposed in the first region; and a second region, which is configured as an annular groove structure surrounding the first region, the second region being smoothly connected to the side wall of the outer cover, and the second region being provided with a second filter hole. On the one hand, the airflow through the first filter hole deviates from the turbine axis and blows towards the turbine in an axial flow manner along the turbine axis, preventing the airflow torque on the turbine from being too small and affecting the normal acceleration of the turbine; on the other hand, droplets and small particles sliding off the side wall of the outer cover can be smoothly collected in the second region, and the droplets collected in the second region can pass through the second filter hole and flow back into the pot body, thereby keeping the inside of the outer cover dry and preventing the substances inside the outer cover from growing bacteria in a humid environment for a long time, which would affect the hygiene of the pressure cooker.

[0014] Optionally, the outer casing has a third filter hole on its side wall, which extends along the axial direction of the outer casing and is distributed circumferentially around the outer casing. On the one hand, after steam passes through the third filter hole, it is blown radially towards the turbine, causing the turbine to simultaneously bear axial and radial gas forces, forming a mixed-flow turbine. This increases the turbine's rotational speed and produces more uniform vibration, thus better shaking off droplets and small particles from the side wall of the outer casing. On the other hand, because the distance between the third filter hole and the food in the pot is relatively large, the possibility of foam and small particles reaching the second filter hole is relatively small. The third filter hole is much larger than the first and second filter holes, which can improve the exhaust rate and reduce the risk of overflow.

[0015] Optionally, along an upward direction, the sidewalls of the outer casing gradually slope away from the axis of the outer casing, with the angle between the sidewalls and the axis of the outer casing being 2° to 5°. On one hand, the normal motion component of droplets and small particles along the sidewalls is reduced, decreasing the probability of droplets and small particles adhering to the sidewalls. On the other hand, when droplets and small particles collide with the sidewalls of the outer casing, they generate shear force flowing along the inclined plane, effectively scraping them off, thus better removing droplets and small particles adhering to the sidewalls of the outer casing. In particular, when the angle between the sidewalls and the axis of the outer casing is 2° to 5°, both the probability of droplets and small particles adhering to the sidewalls and the difficulty of removing droplets and small particles adhering to the sidewall surface can be reasonably controlled.

[0016] Optionally, the steam emission assembly further includes a mounting base with an exhaust channel. The open end of the outer cover is fitted onto the mounting base and threadedly engaged with it. The outer cover is fixed to the lid via the mounting base. Steam inside the outer cover is discharged to the outside of the boiler through the exhaust channel. The threaded engagement between the open end of the outer cover and the mounting base increases the stability and reliability of the outer cover connection, preventing deformation and detachment of the outer cover connection after long-term use.

[0017] Optionally, the outer cover is a tension member, and the open end of the outer cover is injection-molded with an annular threaded component. The threaded component is fitted onto the mounting base and threadedly engages with the mounting base. On the one hand, the injection molding process is simple and can effectively increase the effective length of the threaded engagement without changing the structural shape of the outer cover itself, thereby ensuring the stability and reliability of the outer cover installation and fixation. On the other hand, the injection-molded threaded component has a certain degree of flexibility compared to metal, which can absorb vibration and impact energy, thereby reducing stress concentration in the threaded connection and lowering the risk of loosening due to vibration.

[0018] Optionally, the steam emission assembly further includes an exhaust pipe. The mounting base has a mounting through hole with at least one section having an internal thread. The exhaust pipe is inserted into the mounting through hole and connected to the internal thread. The inner hole of the exhaust pipe forms the exhaust channel. Since both the exhaust pipe and the outer cover are connected to the same mounting base, the number of fasteners required for the steam emission assembly can be reduced, resulting in a simpler overall structure.

[0019] A second aspect of this application provides a pressure cooker lid, comprising a lid body and any of the steam emission components provided in this application. The steam emission component is connected to the lid body and connects the inner and outer sides of the lid body. Steam enters the inner cavity of the outer cover along its natural upward direction and blows directly onto the turbine, which can fully and efficiently utilize the power of the steam. Moreover, the steam blows onto the turbine along its axial direction, forming an axial-flow turbine, which can reduce energy loss caused by sudden changes in airflow direction and can more efficiently convert the flow of steam into the rotational motion of the turbine. This can effectively increase the rotational speed of the turbine, thereby ensuring the separation of foam and small particles from the steam. In addition, the steam flows uniformly along the axial direction of the outer cover, and the liquid and small particles are uniformly thrown tangentially towards the side wall of the outer cover, which can avoid interference between the movement paths of different substances and further ensure the separation of foam and small particles from the steam.

[0020] A third aspect of this application provides a pressure cooker, comprising a pot body and any of the pressure cooker lids provided in this application, wherein the pressure cooker lid is fitted onto the pot body. Steam enters the inner cavity of the outer casing along its natural upward direction and blows directly onto the turbine, fully and efficiently utilizing the power of the steam. Furthermore, the steam blows along the turbine's axial direction, forming an axial-flow turbine, which reduces energy loss caused by sudden changes in airflow direction and more efficiently converts the steam flow into turbine rotational motion. This effectively increases the turbine's rotational speed, thereby ensuring the separation of foam and small particles from the steam. In addition, the steam flows uniformly along the axial direction of the outer casing, while the liquid and small particles are uniformly thrown tangentially towards the sidewalls of the outer casing, avoiding interference between the movement paths of different substances and further ensuring the separation of foam and small particles from the steam.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the pressure cooker lid provided in an embodiment of this application;

[0023] Figure 2 This is a partial structural schematic diagram of the steam emission assembly provided in an embodiment of this application;

[0024] Figure 3 This is a cross-sectional structural diagram showing the connection between the steam emission assembly and the cover provided in an embodiment of this application;

[0025] Figure 4 A schematic diagram showing the disassembled state of the steam emission assembly provided in an embodiment of this application;

[0026] Figure 5 The experimental results are for a pressure cooker using the steam emission assembly of the embodiments of this application;

[0027] Figure 6 The results are from experiments using a pressure cooker with an existing steam valve.

[0028] Figure label:

[0029] 10-Cap;

[0030] 20 - Steam exhaust assembly;

[0031] 1-Outer cover;

[0032] 11-First filter hole;

[0033] 12-Second filter hole;

[0034] 13-Third filter hole;

[0035] 14-First Zone;

[0036] 15 - Second Zone;

[0037] 2-Turbo;

[0038] 21-Connecting hole;

[0039] 22-First gap;

[0040] 23-Second gap;

[0041] 3-Connecting column;

[0042] 31-Limiting flange;

[0043] 4-Mounting base;

[0044] 41 - Mounting through hole;

[0045] 42 - First arc surface;

[0046] 43-First plane;

[0047] 5-Threaded parts;

[0048] 6-Exhaust pipe;

[0049] 61-Shoulder;

[0050] 62 - Second arc surface;

[0051] 63 - Second plane.

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0054] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0056] like Figure 1 As shown in the figure, this application embodiment provides a pressure cooker lid, which includes a lid body 10 and a steam venting assembly 20. The steam venting assembly 20 is connected to the lid body 10 and connects the inner and outer sides of the lid body 10, so that the steam inside the pot can be vented to the outside of the pot through the steam venting assembly 20.

[0057] like Figures 1-4 As shown, the steam emission assembly 20 provided in this embodiment includes an outer cover 1. The outer cover 1 has an upward-opening cavity structure and is provided with filter holes (e.g., a first filter hole 11, a second filter hole 12, and a third filter hole 13, etc.). The filter holes can at least filter large particles. In use, the outer cover 1 is located inside the cover 10 (i.e., the side of the cover 10 facing the pot). The outer cover 1 is connected to the outside of the cover 10 through an exhaust channel. Steam, foam, and small particles in the pot can pass through the filter holes into the inner cavity of the outer cover 1 and then be discharged through the exhaust channel, preventing large particles from clogging the exhaust channel.

[0058] Furthermore, the steam emission assembly 20 also includes a turbine 2, which is disposed inside the outer casing 1 and is capable of rotating around its own axis. Specifically, steam continuously enters the outer casing 1 through the filter holes and exits through the exhaust channel, forming hydrodynamic force that drives the turbine 2 to rotate at high speed around its own axis. Under the high-speed rotation of the turbine 2, foam breaks down to form liquid and is thrown out along with small particles, thus separating the foam and small particles from the steam. This allows the steam to be discharged separately to the outside of the cover 10 through the exhaust channel, effectively preventing foam or small particles from entering or overflowing from the exhaust channel, thereby improving the safety and hygiene of the pressure cooker.

[0059] Furthermore, the axis of turbine 2 is parallel to the axis of outer casing 1, meaning that both the axis of turbine 2 and the axis of outer casing 1 are approximately vertical. The bottom of outer casing 1 is provided with multiple first filter holes 11, the airflow direction of which is parallel to the axis of outer casing 1, and at least a portion of the first filter holes 11 is located within the diameter range of turbine 2. Steam enters the inner cavity of outer casing 1 along its natural upward direction and blows directly onto turbine 2, fully and efficiently utilizing the power of steam. Moreover, the steam blows along the axis of turbine 2, forming an axial-flow turbine 2, which reduces energy loss caused by abrupt changes in airflow direction and more efficiently converts steam flow into turbine rotational motion. This effectively increases the rotational speed of turbine 2, thereby ensuring the separation of foam and small particles from steam. In addition, the steam flows uniformly along the axis of outer casing 1, while liquid and small particles are uniformly thrown tangentially towards the sidewalls of outer casing 1, avoiding interference between the movement paths of different substances and further ensuring the separation of foam and small particles from steam.

[0060] Furthermore, the turbine 2 is provided with a connecting hole 21, which extends axially along the turbine 2 to penetrate both ends of the turbine 2. In other words, the connecting hole 21 is configured as a through hole extending axially along the turbine 2. A connecting post 3 is fixed inside the outer casing 1. For example, the connecting post 3 and the outer casing 1 can be connected and fixed to each other by any suitable method such as threads, snaps, or welding. The connecting post 3 extends axially along the outer casing 1 and is inserted into the connecting hole 21, thereby radially limiting the turbine 2 and allowing the turbine 2 to rotate around the connecting post 3. A limiting flange 31 protrudes from the outer periphery of the connecting post 3, and the limiting flange 31 protrudes above the connecting hole 21. That is, the turbine 2 is sandwiched between the limiting flange 31 and the bottom of the outer casing 1, thereby connecting the turbine 2 and the outer casing 1 into a whole, preventing the turbine 2 from falling out of the outer casing 1 and causing the loss of parts.

[0061] In some embodiments, an annular first gap 22 is provided between the outer wall of the connecting column 3 and the hole wall of the connecting hole 21. The first gap 22 is much larger than the tolerance range of the clearance fit. That is to say, the turbine 2 can swing or move radially on the connecting column 3 to a certain extent. When the turbine 2 rotates, it can exert a squeezing or collision effect on the connecting column 3 radially, causing the outer cover 1 to vibrate, thereby shaking off liquids or small particles thrown on the side wall of the outer cover 1 and realizing automatic cleaning.

[0062] Furthermore, the width W of the first gap 22 is 0.5mm to 1mm. For example, the width W of the first gap 22 can be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, or 1mm, etc., which enables the outer cover 1 to achieve a reliable automatic cleaning effect and the turbine 2 to achieve a reliable separation effect. When the width W of the first gap 22 is less than 0.5mm, the pressure or collision of the turbine 2 on the connecting column 3 is relatively slight, making it difficult to effectively shake off the material on the side wall of the outer cover 1; when the width W of the first gap 22 is greater than 1mm, the rotational stability of the turbine 2 itself is poor, making it difficult to effectively separate foam and small particles from steam.

[0063] In other embodiments, a second gap 23 is provided between the lower surface of the limiting flange 31 and the upper surface of the turbine 2. The second gap 23 is much larger than the tolerance range of the clearance fit. That is to say, the turbine 2 can move axially to a certain extent on the connecting column 3, so that while the turbine 2 is rotating, it can exert a squeezing or collision effect on the connecting column 3 along the axial direction, causing the outer cover 1 to vibrate, thereby shaking off liquids or small particles thrown on the side wall of the outer cover 1, and realizing automatic cleaning.

[0064] Furthermore, the height H of the second gap 23 is 0.5mm to 1mm. For example, the height H of the second gap 23 can be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, or 1mm, etc., so that the outer cover 1 can achieve a reliable automatic cleaning effect. When the height H of the second gap 23 is less than 0.5mm, the squeezing or collision of the turbine 2 with the connecting column 3 is relatively slight, making it difficult to effectively shake off the material on the side wall of the outer cover 1; when the height H of the second gap 23 is greater than 1mm, the squeezing or collision frequency of the turbine 2 with the connecting column 3 is low, also making it difficult to shake off the material on the side wall of the outer cover 1.

[0065] In some embodiments, the connecting post 3 is press-fitted to the bottom of the outer cover 1. On the one hand, the press-fitting causes the materials to interlock through plastic deformation, forming a high-strength and reliable connection that remains stable even in a vibration environment; on the other hand, the press-fitting completes the connection under normal pressure, eliminating the need for complex operations such as preheating, making the process simple and efficient, and less prone to causing abnormalities such as material deformation.

[0066] Furthermore, the bottom of the outer casing 1 includes a first region 14. The first region 14 surrounds the axis of the outer casing 1 and is an annular planar plate structure. The first filter holes 11 are disposed in the first region 14. On the one hand, distributing the first filter holes 11 in the annular region surrounding the axis of the turbine 2 prevents the airflow from the first filter holes 11 from being too close to the axis of the turbine 2, resulting in insufficient torque of the airflow on the turbine 2 and affecting the normal acceleration of the turbine 2; on the other hand, it ensures that the airflow from the first filter holes 11 is all along the axial direction of the turbine 2 and blows towards the turbine 2 in an axial flow manner.

[0067] Furthermore, the bottom of the outer cover 1 includes a second region 15. The second region 15 is configured as an annular groove surrounding the first region 14 to collect droplets and small particles inside the outer cover 1. The second region 15 is smoothly connected to the side wall of the outer cover 1, so that droplets and small particles sliding off the side wall of the outer cover 1 can be collected more smoothly in the second region 15. The second region 15 is provided with a second filter hole 12, through which the droplets collected in the second region 15 can pass and flow back into the pot body, thereby keeping the inside of the outer cover 1 dry and preventing the substances inside the outer cover 1 from growing bacteria in a humid environment for a long time, which would affect the hygiene of the pressure cooker.

[0068] Furthermore, the side wall of the outer casing 1 is provided with a third filter hole 13. After the steam passes through the third filter hole 13, it is blown radially toward the turbine 2, so that the turbine 2 simultaneously bears the axial gas force and the radial gas force, forming a mixed-flow turbine 2. This can increase the rotational speed of the turbine 2 and make the turbine 2 vibrate more evenly, thereby better shaking off the droplets and small particles on the side wall of the outer casing 1.

[0069] Furthermore, the third filter hole 13 extends along the axial direction of the outer cover 1, and the third filter holes 13 are distributed circumferentially around the outer cover 1. That is to say, the third filter hole 13 is a vertically extending elongated hole, making the third filter hole 13 much larger than the first filter hole 11 and the second filter hole 12. Since the distance between the third filter hole 13 and the food in the pot is relatively large, the possibility of foam and small particles reaching the second filter hole 12 is relatively small. Therefore, appropriately increasing the size of the third filter hole 13 can improve the exhaust rate and reduce the risk of overflow.

[0070] Furthermore, along the upward direction, the sidewall of the outer casing 1 gradually slopes away from the axis of the outer casing 1. On the one hand, the normal motion component of droplets and small particles along the sidewall is reduced, decreasing the probability of droplets and small particles adhering to the sidewall; on the other hand, when droplets and small particles collide with the sidewall of the outer casing 1, they generate shear force flowing along the inclined plane, which plays a scraping role, thereby better removing droplets and small particles adhering to the sidewall of the outer casing 1.

[0071] Furthermore, the angle α between the sidewall of the outer cover 1 and the axis of the outer cover 1 is 2° to 5°. For example, the angle α between the sidewall of the outer cover 1 and the axis of the outer cover 1 can be 2°, 2.2°, 2.5°, 2.7°, 3°, 3.2°, 3.5°, 3.8°, 4°, 4.2°, 2.5°, 4.7° or 5°, which can reasonably control the probability of droplets and small particles adhering to the sidewall, and also reasonably control the difficulty of removing droplets and small particles adhering to the sidewall surface. When the angle α between the sidewall of the outer cover 1 and the axis of the outer cover 1 is less than 2°, the normal motion component of the droplets and small particles along the sidewall is still relatively large, and the droplets and small particles are still easy to adhere to the sidewall; when the angle α between the sidewall of the outer cover 1 and the axis of the outer cover 1 is greater than 5°, the upward support of the sidewall on the droplets and small particles is enhanced, which makes it more difficult to remove the droplets or small particles adhering to the sidewall surface.

[0072] Furthermore, the steam emission assembly 20 also includes a mounting base 4, which has an exhaust channel connecting the inner and outer sides of the cover 10. The open end of the outer cover 1 is fitted onto the mounting base 4, meaning that the outer cover 1 is fixed to the cover 10 via the mounting base 4, and the steam inside the outer cover 1 is discharged to the outside of the boiler through the exhaust channel. The open end of the outer cover 1 is threaded into the mounting base 4 to increase the stability and reliability of the connection of the outer cover 1, preventing deformation and detachment of the connection of the outer cover 1 after long-term use.

[0073] The mounting base 4 can be connected to the cover 10 in any suitable manner. For example, the mounting base 4 can be connected to the cover 10 by a non-removable method such as welding or integral molding, or the mounting base 4 can be connected to the cover 10 by a detachable method such as threads or snaps.

[0074] Furthermore, the outer cover 1 is a stretched component. Specifically, the outer cover 1 is made of metal material and processed through a stretching process to form a thin-walled structure with uniform thickness, thereby reducing the weight of the outer cover 1. The open end of the outer cover 1 has an annular threaded component 5 injection-molded. The threaded component 5 is fitted onto the mounting base 4 and threadedly engages with the mounting base 4. In other words, the open end of the outer cover 1 is locally thickened through injection molding. On the one hand, the injection molding process is simple and can effectively increase the effective length of the threaded engagement without changing the structural shape of the outer cover 1, thus ensuring the stability and reliability of the outer cover 1's installation and fixation. On the other hand, the injection-molded threaded component 5 has a certain degree of flexibility relative to metal, which can absorb vibration and impact energy, thereby reducing stress concentration in the threaded connection and lowering the risk of loosening due to vibration.

[0075] Furthermore, the steam emission assembly 20 also includes an exhaust pipe 6, which passes through the cover 10, enabling communication between the inner and outer sides of the cover 10. The mounting base 4 has a mounting through hole 41, with at least one section having an internal thread. The exhaust pipe 6 is inserted into the mounting through hole 41 and connected to the internal thread. The inner hole of the exhaust pipe 6 forms an exhaust channel, meaning that steam inside the outer cover 1 is discharged to the outside of the boiler through the exhaust pipe 6. Since both the exhaust pipe 6 and the outer cover 1 are connected to the same mounting base 4, the number of fasteners required for the steam emission assembly 20 can be reduced, resulting in a simpler overall structure.

[0076] Furthermore, an axially compressed clamping space can be provided between the exhaust pipe 6 and the mounting base 4, so that the cover 10 is clamped between the exhaust pipe 6 and the mounting base 4. Through the interconnection of the exhaust pipe 6 and the mounting base 4, the steam valve discharge assembly is installed and fixed on the cover 10. Specifically, the mounting base 4 is located inside the cover 10 and abuts against the inner surface of the cover 10; the exhaust pipe 6 passes through the cover 10 from top to bottom and is connected to the mounting base 4. The portion of the exhaust pipe 6 exposed outside the cover 10 can be provided with a shoulder 61, which abuts against the outer surface of the cover 10, thereby simultaneously installing and fixing the mounting base 4 and the exhaust pipe 6 on the cover 10.

[0077] The outer periphery of the mounting base 4 may include a first arc surface 42 and a first flat surface 43 spaced apart. The first arc surface 42 is threaded into the outer cover 1, and the first flat surface 43 is engaged with installation tools such as wrenches. Similarly, the outer periphery of the shaft section of the exhaust pipe 6 below the shoulder 61 may include a second arc surface 62 and a second flat surface 63 spaced apart. The second arc surface 62 is threaded into the mounting through hole 41, and the second flat surface 63 is engaged with installation tools such as wrenches. A pressure limiting valve may be further provided above the exhaust pipe 6. The pressure limiting valve moves up and down along the exhaust pipe 6 to open or close the exhaust pipe 6, thereby limiting the maximum pressure inside the pot.

[0078] To illustrate the beneficial effects of the steam emission components described in the embodiments of this application, a comparative experiment was conducted by applying a conventional steam valve and the steam emission components provided in the embodiments of this application to the same pressure cooker. The pressure cookers in each embodiment and comparative example were identical except for the steam emission components; all other parameters (e.g., shape, size, material, thickness, and molding process of the pressure cooker) were exactly the same, and the remaining experimental conditions (e.g., water, rice, and heating power) were also identical.

[0079] The specific experimental steps are as follows: A 6L pressure cooker was used, with 3L of water and 200g of rice added. The cooker was heated to 2000W. After the pressure inside the cooker reached 100Kpa, the heating power remained constant, and heating continued at high heat. Comparative experimental results can be found in [link to comparative experiment]. Figure 5 and Figure 6 .

[0080] in, Figure 5 Using the steam emission assembly provided in this application embodiment, only a slight amount of water vapor and foam are released above the pressure cooker lid; Figure 6 Using existing steam valves, a large amount of steam and foam are sprayed out from above the pressure cooker lid. Therefore, the steam emission assembly provided in this application can effectively prevent foam or small particles from entering or overflowing from the exhaust channel, thereby improving the safety and hygiene of the pressure cooker.

[0081] In addition, this application embodiment also provides a pressure cooker, which includes a pot body and any of the pressure cooker lids provided in this application embodiment, wherein the pressure cooker lid is fitted onto the pot body.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steam emission assembly, characterized in that, include: The outer cover (1) has an upward-opening cavity structure. The bottom of the outer cover (1) is provided with a plurality of first filter holes (11). The airflow direction of the first filter holes (11) is parallel to the axis of the outer cover (1). A turbine (2) is disposed inside the outer casing (1) and is capable of rotating about its own axis. The axis of the turbine (2) is parallel to the axis of the outer casing (1). At least a portion of the first filter hole (11) is located within the diameter range of the turbine (2).

2. The steam emission assembly according to claim 1, characterized in that, The turbine (2) is provided with a connecting hole (21), which extends along the axial direction of the turbine (2) to both ends of the turbine (2); A connecting post (3) is fixed inside the outer cover (1). The connecting post (3) extends along the axial direction of the outer cover (1). A limiting flange (31) is protruding from the outer periphery of the connecting post (3). The connecting post (3) is inserted into the connecting hole (21), and the limiting flange (31) is exposed above the connecting hole (21).

3. The steam emission assembly according to claim 2, characterized in that, An annular first gap (22) is provided between the outer wall of the connecting post (3) and the wall of the connecting hole (21), the width of the first gap (22) being 0.5 mm to 1 mm; and / or, A second gap (23) is provided between the lower surface of the limiting flange (31) and the upper surface of the turbine (2), and the height of the second gap (23) is 0.5mm to 1mm.

4. The steam emission assembly according to claim 2, characterized in that, The connecting column (3) is riveted to the bottom of the outer cover (1).

5. The steam emission assembly according to claim 1, characterized in that, The bottom of the outer cover (1) includes: The first region (14) is an annular planar plate structure, and the first filter hole (11) is disposed in the first region (14). The second region (15) is configured as an annular groove structure surrounding the first region (14). The second region (15) is smoothly connected to the side wall of the outer cover (1). The second region (15) is provided with a second filter hole (12).

6. The steam emission assembly according to claim 1, characterized in that, The outer cover (1) has a third filter hole (13) on its side wall. The third filter hole (13) extends along the axial direction of the outer cover (1), and each of the third filter holes (13) is distributed circumferentially around the outer cover (1).

7. The steam emission assembly according to any one of claims 1-6, characterized in that, Along the bottom-up direction, the sidewall of the outer cover (1) gradually tilts away from the axis of the outer cover (1), and the angle between the sidewall of the outer cover (1) and the axis of the outer cover (1) is 2° to 5°.

8. The steam emission assembly according to any one of claims 1-6, characterized in that, The steam emission assembly also includes a mounting base (4), which is provided with an exhaust channel. The open end of the outer cover (1) is fitted onto the mounting base (4) and threadedly engaged with the mounting base (4).

9. The steam emission assembly according to claim 8, characterized in that, The outer cover (1) is a stretching member. The open end of the outer cover (1) is injection molded with an annular threaded part (5). The threaded part (5) is sleeved on the mounting base (4) and threadedly engaged with the mounting base (4).

10. The steam emission assembly according to claim 8, characterized in that, The steam emission assembly also includes an exhaust pipe (6), the mounting base (4) is provided with an installation through hole (41), the installation through hole (41) has at least one section with an internal thread, the exhaust pipe (6) is inserted into the installation through hole (41) and connected to the internal thread of the installation through hole (41), and the inner hole of the exhaust pipe (6) forms the exhaust channel.

11. A pressure cooker lid, characterized in that, It includes a cover and a steam emission assembly as described in any one of claims 1-10, wherein the steam emission assembly is connected to the cover and communicates with the inner and outer sides of the cover.

12. A pressure cooker, characterized in that, It includes a pot body and a pressure cooker lid as described in claim 11, the pressure cooker lid being fitted onto the pot body.

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