Steam discharge assembly, pressure cooker cover and pressure cooker

Abstract

The invention 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] The present application relates to the technical field of kitchen utensils, and in particular to a steam discharge assembly, a pressure cooker cover and a pressure cooker. BACKGROUND

[0002] A pressure cooker is a common cooking utensil, which mainly functions to increase the heating temperature by increasing the air pressure in the pot, thereby increasing the heating speed. The pressure cooker mainly consists of a pressure cooker cover and a pot body, and the pressure cooker cover and the pot body are fixed to each other by means of buckling or the like. The pressure cooker cover is usually provided with an exhaust valve to release the pressure in the pot.

[0003] In the prior art, when cooking porridge or other liquids containing particles, the liquid continuously rolls in the pot to generate a large amount of foam, and small particles such as food residues enter the exhaust valve along with the foam or even overflow from the exhaust valve, which may cause the exhaust valve to be blocked or the countertop to be contaminated, thereby affecting the safety and cleanliness of the pressure cooker. SUMMARY

[0004] The present application provides a steam discharge assembly, a pressure cooker cover and a pressure cooker to improve the safety and cleanliness of the pressure cooker.

[0005] The first aspect of the present application provides a steam discharge assembly, which comprises:

[0006] An outer cover in the form of a cavity structure with an opening upward, the bottom of the outer cover being 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 arranged in the outer cover and capable of rotating around its own axis, the axis of the turbine being parallel to the axis direction of the outer cover, and at least a part of the first filter holes being located within the diameter range of the turbine.

[0008] The steam exhaust assembly provided by the application comprises an outer cover and a turbine, the outer cover is in the form of a cavity with an opening upward, the bottom of the outer cover is provided with a plurality of first filter holes, the airflow direction of the first filter holes is parallel to the axis of the outer cover; the turbine is arranged in the outer cover and can rotate around its axis, the axis of the turbine is parallel to the direction of the axis of the outer cover, and at least a part of the first filter holes is located within the diameter range of the turbine. Steam enters the inner cavity of the outer cover along the direction of natural upward flow and directly blows against the turbine, so that the power of the steam can be fully and efficiently utilized, and the steam blows against the turbine along the axial direction of the turbine, forming an axial flow turbine, which can reduce the energy loss caused by the sudden change of the airflow direction and can more efficiently convert the flow of the steam into the rotary motion of the turbine. Therefore, the rotary speed of the turbine can be effectively improved, thereby ensuring the effect of mutual separation of the foam and small particles from the steam. In addition, the steam uniformly flows along the axial direction of the outer cover, and the liquid and small particles are uniformly thrown to the side wall of the outer cover along the tangential direction, so that the motion paths of different substances do not interfere with each other, and the effect of mutual separation of the foam and small particles from the steam is further ensured.

[0009] Optionally, the turbine is provided with a connecting hole extending through both ends of the turbine along the axial direction of the turbine; the inner part of the outer cover is fixed with a connecting column extending along the axial direction of the outer cover, and the outer periphery of the connecting column is provided with a limiting flange; the connecting column is inserted into the connecting hole, and the limiting flange is exposed above the connecting hole. The connecting column simultaneously forms radial limiting and axial limiting for the turbine, so that the turbine can rotate around the connecting column and the turbine and the outer cover can be connected into an integral whole, preventing the turbine from falling out of the outer cover and causing the loss of parts.

[0010] Optionally, an annular first gap is arranged between the outer wall of the connecting column and the hole wall of the connecting hole, and the width of the first gap is 0.5mm-1mm. The turbine can shake or move radially on the connecting column within a certain range, so that the turbine can stably rotate to realize reliable separation effect, and the connecting column can be pressed or collided in the radial direction, so that the outer cover vibrates to shake off the liquid or small particles and other substances thrown on the side wall of the outer cover, realizing reliable automatic cleaning effect.

[0011] Optionally, a second gap is arranged between the lower surface of the limiting flange and the upper surface of the turbine, and the height of the second gap is 0.5mm-1mm. The turbine can axially move on the connecting column within a certain range, so that the turbine can stably rotate to realize reliable separation effect, and the connecting column can be pressed or collided in the axial direction, so that the outer cover vibrates to shake off the liquid or small particles and other substances thrown on the side wall of the outer cover, realizing reliable automatic cleaning effect.

[0012] Optionally, the connecting column is press-riveted to the bottom of the outer cover. On the one hand, press-riveting makes materials bite through plastic deformation to form a high-strength reliable connection, which can still maintain stability in a vibrating environment; on the other hand, press-riveting completes the connection in a normal pressure state without complex operations such as preheating, and the process is simple and efficient, and the materials are less likely to be deformed and other abnormalities.

[0013] Optionally, the bottom of the outer cover comprises: a first area which is an annular planar structure, and the first filter hole is arranged in the first area; and a second area which is an annular groove structure arranged around the first area, and the second area is smoothly connected with the sidewall of the outer cover, and the second area is provided with a second filter hole. On the one hand, the airflow of the first filter hole deviates from the axis of the turbine and blows to the turbine in an axial flow manner along the axial direction of the turbine, preventing the torque of the airflow on the turbine from being too small to affect the normal acceleration of the turbine; on the other hand, the liquid droplets and small particles falling from the sidewall of the outer cover can be smoothly collected in the second area, and the liquid droplets collected in the second area can pass through the second filter hole and flow back into the pot body, so that the inside of the outer cover remains dry, preventing the substances in the outer cover from breeding bacteria in a humid environment for a long time and affecting the hygienic property of the pressure cooker.

[0014] Optionally, the sidewall of the outer cover is provided with third filter holes which extend along the axial direction of the outer cover, and each of the third filter holes is spaced apart around the circumferential direction of the outer cover. On the one hand, after the steam passes through the third filter holes, it blows to the turbine in a radial direction, so that the turbine simultaneously bears axial gas power and radial gas power, forming a mixed-flow turbine which can increase the rotation speed of the turbine and make the turbine produce more uniform vibration, thereby better shaking off the liquid droplets and small particles on the sidewall of the outer cover; on the other hand, since the distance between the third filter holes and the food materials in the pot is large, the possibility of substances such as foam and small particles reaching the second filter hole is small, and the third filter hole is much larger than the first filter hole and the second filter hole, which can improve the exhaust rate and reduce the risk of pot overflow.

[0015] Optionally, in a downward direction, the sidewall of the outer cover gradually inclines away from the axis of the outer cover, and the included angle between the sidewall of the outer cover and the axis of the outer cover is 2°-5°. On the one hand, the motion component of the liquid droplets and small particles along the normal direction of the sidewall is reduced, reducing the probability of the liquid droplets and small particles adhering to the sidewall; on the other hand, when the liquid droplets and small particles hit the sidewall of the outer cover, a shear force along the inclined surface is generated, which has a scraping-off effect, thereby better removing the liquid droplets and small particles adhering to the sidewall of the outer cover. In particular, when the included angle between the sidewall of the outer cover and the axis of the outer cover is 2°-5°, the probability of the liquid droplets and small particles adhering to the sidewall can be reasonably controlled, and the difficulty of removing the liquid droplets and small particles adhering to the surface of the sidewall can also be reasonably controlled.

[0016] Optionally, the steam discharging assembly further comprises a mounting base provided with an exhaust passage, and the open end of the outer cover is sleeved on the mounting base and threadedly connected with the mounting base. The outer cover is mounted and fixed on the cover body through the mounting base, and the steam in the outer cover is discharged to the outside of the pot through the exhaust passage. The open end of the outer cover is threadedly connected with the mounting base, so that the stability and reliability of the connection of the outer cover can be improved, and the outer cover is prevented from being deformed and falling off at the connection position of the steam discharging assembly after long-term use.

[0017] Optionally, the outer cover is a stretch member, and an annular threaded member is injection molded on the open end of the outer cover. The threaded member is sleeved on the mounting base and threadedly connected with the mounting base. On the one hand, the injection molding process is simple, and the effective length of the threaded connection can be effectively increased without changing the structure and shape of the outer cover, so that the stability and reliability of the mounting and fixation of the outer cover can be ensured. On the other hand, the threaded member injection molded has a certain flexibility relative to metal, can absorb vibration and impact energy, so that the stress concentration of the threaded connection is reduced, and the risk of loosening caused by vibration is reduced.

[0018] Optionally, the steam discharging assembly further comprises an exhaust pipe, and the mounting base is provided with a mounting through hole having an internal thread at least in a section. The exhaust pipe is inserted into the mounting through hole and connected to the internal thread of the mounting through hole, and an inner hole of the exhaust pipe forms the exhaust passage. The exhaust pipe and the outer cover are both connected to the same mounting base, so that the number of fasteners required by the steam discharging assembly can be reduced, and the overall structure is more simple.

[0019] The second aspect of the present application provides a pressure cooker cover, which comprises a cover body and any one of the steam discharging assemblies provided by the present application. The steam discharging assembly is connected to the cover body and communicates between the inside and outside of the cover body. The steam enters the inner cavity of the outer cover along the natural upward direction and directly blows towards the turbine, so that the power of the steam can be fully and efficiently utilized. Moreover, the steam blows towards the turbine along the axial direction of the turbine, forming an axial flow turbine, so that the energy loss caused by the sudden change of airflow direction can be reduced, and the flow of steam can be more efficiently converted into the rotational motion of the turbine. Thus, the rotational speed of the turbine can be effectively improved, so that the effect of separating the foam and small particles from the steam can be ensured. In addition, the steam flows uniformly along the axial direction of the outer cover, and the liquid and small particles are uniformly thrown towards the side wall of the outer cover along the tangential direction, so that the motion paths of different substances can be avoided from interfering with each other, and the effect of separating the foam and small particles from the steam can be further ensured.

[0020] The third aspect of the present application provides a pressure cooker, which comprises a cooker body and any one of the pressure cooker covers provided by the present application, wherein the pressure cooker cover covers the cooker body. Steam enters the inner cavity of the outer cover along the natural upward direction and directly blows to the turbine, so that the power of the steam can be fully and efficiently utilized. Moreover, the steam blows to the turbine along the axial direction of the turbine, forming an axial flow turbine, which can reduce the energy loss caused by the sudden change of airflow direction and can more efficiently convert the flow of steam into the rotational motion of the turbine. Thus, the rotational speed of the turbine can be effectively improved, thereby ensuring the effect of mutual separation of the 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 to the side wall of the outer cover along the tangential direction, so that the motion paths of different substances do not interfere with each other, further ensuring the effect of mutual separation of the foam and small particles from the steam.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Partial structural schematic diagram of the pressure cooker cover provided by the embodiment of the present application;

[0023] Figure 2 Partial structural schematic diagram of the steam discharge assembly provided by the embodiment of the present application;

[0024] Figure 3 Cross-sectional structural schematic diagram of the connection between the steam discharge assembly and the cover body provided by the embodiment of the present application;

[0025] Figure 4 Schematic diagram of the disassembled state of the steam discharge assembly provided by the embodiment of the present application;

[0026] Figure 5 Experimental results of the pressure cooker using the steam discharge assembly of the embodiment of the present application;

[0027] Figure 6 Experimental results of the pressure cooker using the existing steam valve.

[0028] REFERENCE SIGNS:

[0029] 10-cover body;

[0030] 20-steam discharge assembly;

[0031] 1-outer cover;

[0032] 11-first filter hole;

[0033] 12-second filter hole;

[0034] 13-third filter hole;

[0035] 14 - first region;

[0036] 15 - second region;

[0037] 2 - turbine;

[0038] 21 - connecting hole;

[0039] 22 - first gap;

[0040] 23 - second gap;

[0041] 3 - connecting column;

[0042] 31 - limiting flange;

[0043] 4 - mounting seat;

[0044] 41 - mounting through hole;

[0045] 42 - first curved surface;

[0046] 43 - first plane;

[0047] 5 - threaded part;

[0048] 6 - exhaust pipe;

[0049] 61 - shaft shoulder;

[0050] 62 - second curved surface;

[0051] 63 - second plane.

[0052] The drawings incorporated herein and forming a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application. DETAILED DESCRIPTION

[0053] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0054] In the description of the present application, unless otherwise explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the description of the present specification, it should be understood that the "upper", "lower" and other orientation words described in the embodiments of the present application are described in the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when referring to one element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element.

[0056] As shown in Figure 1 The embodiments of the present application provide a pressure cooker cover, which comprises a cover body 10 and a steam discharge assembly 20. The steam discharge assembly 20 is connected to the cover body 10 and communicates between the inside and outside of the cover body 10, so that the steam in the pot can be discharged to the outside of the pot with the steam discharge assembly 20.

[0057] As shown in Figures 1-4 The steam discharge assembly 20 provided by the embodiments of the present application comprises an outer cover 1, which is in the form of a cavity with an opening upward. The outer cover 1 is provided with filter holes (for example, first filter holes 11, second filter holes 12 and third filter holes 13, etc.), which can at least filter large particles. In use, the outer cover 1 is arranged on the inner side of the cover body 10 (i.e. the side of the cover body 10 facing the pot body), and the outer cover 1 is connected to the outer side of the cover body 10 through an exhaust passage. The 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 passage, preventing the exhaust passage from being blocked by large particles.

[0058] Further, the steam discharge assembly 20 further comprises a turbine 2, which is arranged in the outer cover 1 and can rotate around its own axis. Specifically, the steam continuously enters the outer cover 1 through the filter holes and is discharged through the exhaust passage, forming fluid power to blow the turbine 2 to rotate at high speed around its own axis. Under the action of high-speed rotation of the turbine 2, the foam is broken to form liquid and is thrown out together with small particles, so that the foam and small particles are separated from the steam, so that the steam is discharged to the outside of the cover body 10 through the exhaust passage, effectively preventing the foam or small particles from entering or overflowing from the exhaust passage, thereby improving the safety and cleanliness of the pressure cooker.

[0059] Further, the axis of the turbine 2 is parallel to the axis direction of the outer cover 1, that is, the axis of the turbine 2 and the axis of the outer cover 1 are both substantially along the vertical direction. 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, and at least a part of the first filter holes 11 is within the diameter range of the turbine 2. The steam enters the inner cavity of the outer cover 1 along the direction of natural rising and directly blows to the turbine 2, which can fully and efficiently utilize the power of the steam, and the steam blows to the turbine 2 along the axial direction of the turbine 2, forming an axial turbine 2, which can reduce the energy loss caused by the sudden change of airflow direction, and can more efficiently convert the flow of steam into the rotational motion of the turbine 2. Therefore, the rotational speed of the turbine 2 can be effectively improved, thereby ensuring the effect of separating the foam and small particles from the steam. In addition, the steam flows uniformly along the axial direction of the outer cover 1, and the liquid and small particles are uniformly thrown to the side wall of the outer cover 1 along the tangential direction, which can avoid the interference between the motion paths of different substances, and further ensure the effect of separating the foam and small particles from the steam.

[0060] Further, the turbine 2 is provided with a connecting hole 21 extending along the axial direction of the turbine 2 to the both ends of the turbine 2, that is, the connecting hole 21 is provided as a through hole extending along the axial direction of the turbine 2. The inner part of the outer cover 1 is fixed with a connecting column 3, for example, the connecting column 3 and the outer cover 1 can be connected and fixed with each other by any appropriate way such as thread, buckle or welding. The connecting column 3 extends along the axial direction of the outer cover 1, the connecting column 3 is inserted into the connecting hole 21, thereby forming radial limiting for the turbine 2, and making the turbine 2 rotate around the connecting column 3. The outer periphery of the connecting column 3 is provided with a limiting flange 31, the limiting flange 31 is exposed above the connecting hole 21, that is, the turbine 2 is clamped between the limiting flange 31 and the bottom of the outer cover 1, thereby making the turbine 2 and the outer cover 1 connected as a whole, preventing the turbine 2 from falling out of the outer cover 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 gap fit, that is, the turbine 2 can shake or move radially on the connecting column 3 within a certain amplitude, so that the turbine 2 can produce extrusion or collision effect along the radial direction to the connecting column 3 while rotating, so that the outer cover 1 vibrates, thereby shaking off the liquid or small particles and other substances thrown on the side wall of the outer cover 1, realizing automatic cleaning.

[0062] Further, the width W of the first gap 22 is 0.5mm-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 can make the outer cover 1 achieve reliable automatic cleaning effect, and the turbine 2 can achieve reliable separation effect. When the width W of the first gap 22 is less than 0.5mm, the extrusion or collision of the turbine 2 on the connecting column 3 is relatively light, which is 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 stability of the turbine 2 itself is poor, so it is difficult to effectively separate the foam and small particles from the 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, and the second gap 23 is much larger than the tolerance range of the gap cooperation, that is, the turbine 2 can have a certain amplitude of axial movement on the connecting column 3, so that the turbine 2 can produce extrusion or collision on the connecting column 3 in the axial direction while rotating, so that the outer cover 1 vibrates, thereby shaking off the liquid or small particles on the side wall of the outer cover 1, and achieving automatic cleaning.

[0064] Further, the height H of the second gap 23 is 0.5mm-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 as to make the outer cover 1 achieve reliable automatic cleaning effect. When the height H of the second gap 23 is less than 0.5mm, the extrusion or collision of the turbine 2 on the connecting column 3 is relatively light, which is 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 extrusion or collision frequency of the turbine 2 on the connecting column 3 is low, which will also be difficult to shake off the material on the side wall of the outer cover 1.

[0065] In some embodiments, the connecting column 3 is press riveted to the bottom of the outer cover 1. On the one hand, the press riveting makes the material bite through plastic deformation, forming a high-strength reliable connection, which can still be stable in a vibrating environment; on the other hand, the press riveting completes the connection in a normal pressure state without the need for complex operations such as preheating, and the process is simple and efficient, and the material is not easy to deform and other abnormalities.

[0066] Further, the bottom of the outer cover 1 comprises a first area 14. The first area 14 surrounds the axis of the outer cover 1, and the first area 14 is an annular planar structure, and the first filter hole 11 is arranged in the first area 14. On the one hand, the first filter hole 11 is distributed in the annular area surrounding the axis of the turbine 2, so as to avoid the gas flow of the first filter hole 11 being too close to the axis of the turbine 2, which causes the torque of the gas flow on the turbine 2 to be too small, thereby affecting the normal acceleration of the turbine 2; on the other hand, it can be ensured that the gas flow of the first filter hole 11 is all along the axial direction of the turbine 2, so as to blow to the turbine 2 in the axial flow mode.

[0067] Further, the bottom of the outer cover 1 comprises a second area 15. The second area 15 is arranged in the form of an annular groove surrounding the first area 14, so as to collect the liquid droplets and small particles and other substances in the outer cover 1. The second area 15 is smoothly connected with the side wall of the outer cover 1, so that the liquid droplets and small particles falling from the side wall of the outer cover 1 can be more smoothly collected into the second area 15. The second area 15 is provided with a second filter hole 12, and the liquid droplets collected by the second area 15 can pass through the second filter hole 12 and flow back into the pot body, so that the inside of the outer cover 1 is kept dry, thereby preventing the substances in the outer cover 1 from breeding bacteria in a humid environment for a long time, and affecting the hygienic property of the pressure cooker.

[0068] Further, the side wall of the outer cover 1 is provided with a third filter hole 13, and after the steam passes through the third filter hole 13, the steam blows to the turbine 2 in the radial direction, so that the turbine 2 simultaneously bears the axial gas power and the radial gas power, thereby forming a mixed-flow turbine 2, which can not only increase the rotation speed of the turbine 2, but also make the turbine 2 produce more uniform vibration, so as to better shake off the liquid droplets and small particles on the side wall of the outer cover 1.

[0069] Further, the third filter hole 13 extends along the axis of the outer cover 1, and each third filter hole 13 is spaced apart around the circumference of the outer cover 1, that is, the third filter hole 13 is a vertically extending long strip-shaped hole, so that the third filter hole 13 is 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 the foam and small particles and other substances reaching the second filter hole 12 is relatively small, and therefore, appropriately increasing the third filter hole 13 can improve the exhaust rate and reduce the risk of pot overflow.

[0070] Further, along the direction from bottom to top, the side wall of the outer cover 1 gradually inclines away from the axis of the outer cover 1. On the one hand, the motion component of the liquid droplets and small particles along the normal direction of the side wall is reduced, thereby reducing the probability of the liquid droplets and small particles adhering to the side wall; on the other hand, when the liquid droplets and small particles hit the side wall of the outer cover 1, a shearing force along the inclined surface is generated, thereby playing a scraping-off role, so as to better remove the liquid droplets and small particles adhering to the side wall of the outer cover 1.

[0071] Further, the angle a between the side wall of the outer cover 1 and the axis of the outer cover 1 is 2°-5°, for example, the angle a between the side wall 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°, etc., which can reasonably control the probability of droplets and small particles adhering to the side wall, and reasonably control the difficulty of removing the droplets and small particles adhering to the surface of the side wall. When the angle a between the side wall of the outer cover 1 and the axis of the outer cover 1 is less than 2°, the motion component of the droplets and small particles along the normal direction of the side wall is still relatively large, and the droplets and small particles are still easy to adhere to the side wall; when the angle a between the side wall of the outer cover 1 and the axis of the outer cover 1 is greater than 5°, the support of the side wall to the upward movement of the droplets and small particles is enhanced, which increases the difficulty of removing the droplets or small particles adhering to the surface of the side wall.

[0072] Further, the steam discharge assembly 20 further comprises a mounting seat 4, the mounting seat 4 is provided with an exhaust passage, the exhaust passage communicates between the inside and outside of the cover body 10. The open end of the outer cover 1 is sleeved on the mounting seat 4, that is, the outer cover 1 is mounted and fixed on the cover body 10 through the mounting seat 4, and the steam in the outer cover 1 is discharged to the outside of the pot through the exhaust passage. The open end of the outer cover 1 is threadedly connected with the mounting seat 4 to increase the stability and reliability of the connection of the outer cover 1, and prevent the outer cover 1 from being deformed and falling off at the connection after long-term use of the steam discharge assembly 20.

[0073] Among them, the mounting seat 4 can be connected to the cover body 10 in any appropriate manner, for example, the mounting seat 4 can be connected to the cover body 10 in a non-detachable manner such as welding or one-piece forming, or the mounting seat 4 can be connected to the cover body 10 in a detachable manner such as threading or buckling.

[0074] Further, the outer cover 1 is a stretching piece, specifically, the outer cover 1 adopts a metal material as a raw material and is processed and formed through a stretching process, so as to form a thin-walled structure with uniform thickness of the outer cover 1 and reduce the weight of the outer cover 1. 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 seat 4 and is threadedly connected with the mounting seat 4, that is, the open end of the outer cover 1 is locally thickened by injection molding. On the one hand, the injection molding process is simple, which can effectively increase the effective length of the threaded connection without changing the structure and shape of the outer cover 1 itself, thereby ensuring the stability and reliability of the mounting and fixation of the outer cover 1; on the other hand, the injection molded threaded part 5 has a certain flexibility relative to metal, which can absorb vibration and impact energy, thereby reducing the stress concentration of the threaded connection and reducing the risk of loosening caused by vibration.

[0075] Further, the steam discharging assembly 20 further comprises an exhaust pipe 6, which is arranged in the cover 10 to realize the communication between the inside and outside of the cover 10. The mounting seat 4 is provided with a mounting through hole 41, at least one section of which is provided with an internal thread, and 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 passage, that is, the steam in the outer cover 1 is discharged to the outside of the pot through the exhaust pipe 6. The exhaust pipe 6 and the outer cover 1 are both connected to the same mounting seat 4, which can reduce the number of fasteners required by the steam discharging assembly 20, thereby making the overall structure more simple.

[0076] Further, the exhaust pipe 6 and the mounting seat 4 can be provided with an axially extruded clamping space, so that the cover 10 is clamped between the exhaust pipe 6 and the mounting seat 4. Through the mutual connection of the exhaust pipe 6 and the mounting seat 4, the installation and fixation of the steam valve discharging assembly on the cover 10 are realized. Specifically, the mounting seat 4 is arranged on the inner side of the cover 10 and abuts against the inner side surface of the cover 10; the exhaust pipe 6 passes through the cover 10 from top to bottom and is connected to the mounting seat 4. The part of the exhaust pipe 6 exposed to the outside of the cover 10 can be provided with a shaft shoulder 61, which abuts against the outer side surface of the cover 10, thereby realizing the installation and fixation of the mounting seat 4 and the exhaust pipe 6 on the cover 10 at the same time.

[0077] Among them, the outer periphery of the mounting seat 4 can include first arc surfaces 42 and first planes 43 which are arranged at intervals, the first arc surfaces 42 are threadedly matched with the outer cover 1, and the first planes 43 are matched with installation tools such as wrenches. Similarly, the outer periphery of the shaft section of the exhaust pipe 6 below the shaft shoulder 61 can include second arc surfaces 62 and second planes 63 which are arranged at intervals, the second arc surfaces 62 are threadedly matched with the mounting through hole 41, and the second planes 63 are matched with installation tools such as wrenches. The upper part of the exhaust pipe 6 can be further provided with a pressure limiting valve, which moves up and down along the exhaust pipe 6 to open or close the exhaust pipe 6, thereby limiting the maximum pressure in the pot.

[0078] In order to illustrate the beneficial effects of the steam discharging assembly of the embodiments of the present application, the existing ordinary steam valve and the steam discharging assembly provided by the embodiments of the present application are applied to the same pressure cooker for comparative experiments. Among them, the pressure cookers of each embodiment and the comparative example are completely the same in other parameters (for example, the shape, size, material, thickness and forming process of the pressure cooker, etc.) except for the steam discharging assembly, and the remaining experimental conditions (for example, water, rice and heating power, etc.) are also completely the same.

[0079] The specific experimental steps are as follows: a 6L volume pressure cooker is used, 3L water and 200g rice are added, and heating is carried out at a power of 2000W. After the pressure in the pot reaches 100Kpa, the heating power remains unchanged and the fire is continuously heated. The comparative experimental results are shown in Table 1. Figure 5 and Figure 6 .

[0080] wherein, Figure 5 By using the steam discharge assembly provided by the embodiment of the present application, only slight water vapor and foam are generated above the pressure cooker cover; Figure 6 By using the existing steam valve, a large amount of water vapor and foam is sprayed above the pressure cooker cover. Therefore, the steam discharge assembly provided by the embodiment of the present application can effectively prevent foam or small particles from entering or overflowing from the exhaust passage, thereby improving the use safety and cleanliness of the pressure cooker.

[0081] In addition, the embodiment of the present application also provides a pressure cooker, which comprises a pot body and any one of the pressure cooker covers provided by the embodiment of the present application, and the pressure cooker cover is covered on the pot body.

[0082] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steam vent assembly, characterized by, The steam exhaust assembly comprises: an outer cover (1) in the form of an open upward cavity structure, the bottom of the outer cover (1) being provided with a plurality of first filter holes (11) with airflow direction parallel to the axis of the outer cover (1); a turbine (2) arranged in the outer cover (1) and capable of rotating around its own axis, the axis of the turbine (2) being parallel to the axis direction of the outer cover (1), and at least a part of the first filter holes (11) being located within the diameter range of the turbine (2).

2. The steam vent assembly of claim 1, wherein, The turbine (2) is provided with a connecting hole (21) extending along the axial direction of the turbine (2) to the two ends of the turbine (2); The inner part of the outer cover (1) is fixed with a connecting column (3) extending along the axial direction of the outer cover (1), and the outer periphery of the connecting column (3) is provided with a limiting flange (31); The connecting column (3) is inserted into the connecting hole (21), and the limiting flange (31) is exposed above the connecting hole (21).

3. The steam vent assembly of claim 2, wherein, An annular first gap (22) is arranged between the outer wall of the connecting column (3) and the hole wall of the connecting hole (21), and the width of the first gap (22) is 0.5mm-1mm; and / or, A second gap (23) is arranged 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-1mm.

4. The steam vent assembly of claim 2, wherein, The connecting column (3) is press riveted and fixed to the bottom of the outer cover (1).

5. The steam discharge assembly of claim 1, wherein, The bottom of the outer cover (1) comprises: a first area (14) in the form of an annular planar plate structure, and the first filter holes (11) are arranged in the first area (14); a second area (15) in the form of an annular groove structure arranged around the first area (14), the second area (15) being smoothly connected with the side wall of the outer cover (1), and the second area (15) being provided with second filter holes (12).

6. The steam discharge assembly of claim 1, wherein, The side wall of the outer cover (1) is provided with third filter holes (13) extending along the axial direction of the outer cover (1), and each of the third filter holes (13) is distributed at intervals around the circumferential direction of the outer cover (1).

7. The steam vent assembly of any of claims 1-6, wherein, In the direction from bottom to top, the side wall of the outer cover (1) gradually inclines away from the axis of the outer cover (1), and the included angle between the side wall of the outer cover (1) and the axis of the outer cover (1) is 2°-5°.

8. The steam vent assembly of any of claims 1-6, wherein, The steam exhaust assembly further comprises a mounting seat (4) provided with an exhaust passage, and the open end of the outer cover (1) is sleeved on the mounting seat (4) and threadedly cooperates with the mounting seat (4).

9. The steam vent assembly of claim 8, wherein, The outer cover (1) is a stretch member, and the open end of the outer cover (1) is injection molded with an annular threaded member (5), the threaded member (5) is sleeved on the mounting seat (4) and threadedly cooperates with the mounting seat (4).

10. The steam vent assembly of claim 8, wherein, The steam exhaust assembly further comprises an exhaust pipe (6), the mounting seat (4) is provided with a mounting through hole (41), at least one section of the mounting through hole (41) is provided with internal threads, the exhaust pipe (6) is inserted into the mounting through hole (41) and connected to the internal threads of the mounting through hole (41), and the inner hole of the exhaust pipe (6) forms the exhaust passage.

11. A pressure cooker lid characterized in that The steam exhaust assembly comprises a cover body and the steam exhaust assembly according to any one of claims 1-10, the steam exhaust assembly is connected to the cover body and communicates between the inside and outside of the cover body.

12. A pressure cooker characterized by The steam exhaust assembly comprises a pot body and the pressure cooker cover according to claim 11, the pressure cooker cover covers the pot body.

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