Micro-pressure valve, cover and cooking appliance

Abstract

The utility model relates to a kind of micro-pressure valve, lid and cooking utensil, comprising: valve body, valve body is equipped with gas outlet hole;Valve core, valve core is set to valve body, and steam passage is formed on valve core, and the cross-sectional area S of steam passage satisfies: 10mm 2 ≤S≤125mm 2 Ensure that steam can accumulate in cooking cavity, to form and maintain micro-pressure in cooking cavity, improve cooking effect;While ensuring that steam in cooking cavity can be normally discharged through steam passage, avoid the cross-sectional area of steam passage too small to cause the pressure in cooking cavity too high or the whole cooking cavity is in airtight state and cause micro-pressure valve easily damaged or failure, reduce security risk, improve the reliability of micro-pressure valve, prolong service life;Cooking utensil can form 0.4kPa micro-pressure environment inside cooking cavity under boiling state, improve cooking effect and cooking speed;The structure of the micro-pressure valve is simple, and each element is relatively fixed, so as to facilitate processing and assembly, and the cost is lower.

Description

Technical Field

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

[0002] Cooking appliances, such as electric slow cookers, include a pot body, a cooking cavity, an inner pot located within the cooking cavity, and a lid for covering the cooking cavity. To maintain a low-pressure state within the cooking cavity, existing technologies include a low-pressure valve on the lid. This valve is sealed to the lid and contains a movable floating element. When the pressure is low, the floating element seals the vent, maintaining a low-pressure state within the cooking cavity. When the pressure is high and exceeds the resistance of the floating element's upward movement, the sealing element is lifted, releasing the pressure within the cooking cavity.

[0003] However, this structure is complex. When the floating component is not depressurized, the entire cooking cavity is in a sealed state, which can easily cause the seal between the micro-pressure valve and the cover to fail or reduce its service life. Utility Model Content

[0004] Therefore, it is necessary to provide a micro-pressure valve, a lid, and a cooking appliance to address the above problems. The micro-pressure valve has a simple structure and high reliability.

[0005] This utility model provides a micro-pressure valve, comprising: a valve body having an air outlet; and a valve core disposed on the valve body, wherein a steam channel is formed on the valve core, and the cross-sectional area S of the steam channel satisfies: 10 mm². 2 ≤S≤125mm 2 .

[0006] In the aforementioned micro-pressure valve, the gas inside the cooking chamber can be discharged through the steam channel and the vent; by limiting S≤125mm 2 This ensures that steam can accumulate within the cooking cavity, forming and maintaining a micro-pressure to improve cooking performance. It also prevents the cooking cavity from failing to form a micro-pressure environment due to an excessively large cross-sectional area S of the steam channel, or results in an excessively large overall volume of the micro-pressure valve. Simultaneously, S is limited to ≥ 10 mm. 2 This design ensures that steam in the cooking chamber can be discharged normally through the steam channel, preventing excessive pressure in the cooking chamber due to an excessively small cross-sectional area S of the steam channel, or the entire cooking chamber being in a sealed state, which could easily damage or cause the micro-pressure valve to fail. This reduces safety hazards, improves the reliability of the micro-pressure valve, and extends its service life. When the cross-sectional area S of the steam channel is within the above range, a micro-pressure environment of 0.4 kPa can be formed inside the cooking chamber when the cooking appliance is boiling, improving the cooking effect and cooking speed. Furthermore, the micro-pressure valve has a simple structure, with each component relatively fixed, making it easy to process and assemble, and reducing costs.

[0007] In one embodiment, the cross-sectional area S of the steam channel satisfies: 10 mm. 2 ≤S≤50mm 2 .

[0008] This design allows for a higher micro-pressure environment inside the cooking chamber, further improving cooking results and speed.

[0009] In one embodiment, the valve body includes an upper valve body and a lower valve body. The upper valve body has the air outlet and a fixing part. The lower valve body has an air inlet and a mating part. The valve core is located between the air inlet and the air outlet. The valve core has a first clearance hole. One of the fixing part or the mating part passes through the first clearance hole and is fixedly connected to the other, forming the steam passage between the fixing part and the inner wall of the first clearance hole.

[0010] With this configuration, the steam channel formed between the fixed part or the mating part and the inner wall of the first clearance hole can increase the cross-sectional size of the first clearance hole itself, making the processing technology simpler. Moreover, the steam channel is roughly annular, which allows the airflow through the steam channel to be relatively dispersed and overflow, avoiding the formation of a single concentrated airflow.

[0011] In one embodiment, the valve core is fixed to the upper valve body or the lower valve body.

[0012] With this configuration, the valve core can be installed as a whole after being fixed to the upper or lower valve body, thereby reducing the number of parts and simplifying the assembly process.

[0013] In one embodiment, the upper valve body includes a top cover and a side wall connected to the top cover. The top cover includes a central region and an edge region located around the central region. The fixing part is located in the central region, and the air outlet is located in the edge region. The area where the orthographic projection of the steam passage on the top cover is located is within the central region.

[0014] With this configuration, steam enters the second cavity from the steam channel near the center and diffuses outward to the edge area, then dissipates from the vent located in the edge area, preventing steam accumulation and thus optimizing the exhaust path. It also ensures that the steam channel and the vent are completely misaligned, preventing a single stream of air from overflowing directly from the vent, reducing airflow impact, improving steam dispersion, and preventing condensate or external moisture at the vent from dripping directly into the lower valve body through the vent and steam channel.

[0015] In one embodiment, the fixing part is a screw post, the mating part is a fixing hole, and the fixing part and the mating part are fixedly connected by fasteners.

[0016] This design avoids exposed fasteners, improves the aesthetics of the micro-pressure valve, and ensures the stability and reliability of the connection between the upper and lower valve bodies. The two are detachable, which also facilitates processing and assembly, as well as later maintenance and cleaning.

[0017] This utility model also provides a cover, comprising: a cover body having an assembly hole; and the micro-pressure valve being installed in the assembly hole.

[0018] With this configuration, devices using this cover can achieve a micro-pressure environment inside the device.

[0019] In one embodiment, the valve body includes an upper valve body and a lower valve body. The upper valve body has the air outlet and a fixing part. The lower valve body has an air inlet and a mating part. The valve core is located between the air inlet and the air outlet. The valve core has a first clearance hole. The upper valve body and the lower valve body sandwich the cover so that the cover part is located between the air inlet and the air outlet and forms the valve core. The assembly hole forms the first clearance hole. One of the fixing part or the mating part passes through the first clearance hole and is fixedly connected to the other, forming the steam passage between the fixing part and the inner wall of the first clearance hole.

[0020] This design simplifies the structure of the micro-pressure valve and the cover, reduces the number of parts, facilitates processing and assembly, and lowers costs.

[0021] In one embodiment, a handle is further included, the handle comprising a handle portion and an extension integrally formed with the handle portion, the extension portion having a second clearance hole, the valve body comprising an upper valve body and a lower valve body, the upper valve body having an air outlet and a fixing portion; the lower valve body having an air inlet and a mating portion; wherein the upper valve body and the lower valve body sandwich the cover and the extension portion, one of the fixing portion or the mating portion passes through the second clearance hole and is fixedly connected to the other, and forms the steam channel between the fixing portion and the inner wall of the second clearance hole, the air inlet communicating with the air outlet through the steam channel.

[0022] This design allows for the machining of a second clearance hole with a relatively large cross-sectional size on the extension of the handle, as well as a mounting hole with a larger cross-sectional size on the cover, simplifying the machining process.

[0023] This utility model also provides a cooking utensil, including the aforementioned lid.

[0024] With this design, the cooking appliance can create a micro-pressure environment inside the cooking chamber, thereby improving cooking efficiency and food texture, and enhancing the cooking effect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the lid according to one embodiment of the present utility model;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 for Figure 1 A cross-sectional view of the lid;

[0029] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0030] Figure 5 for Figure 4 Cross-sectional view of the lower valve body and valve core;

[0031] Figure 6 for Figure 1 A cross-sectional view of another embodiment of the lid;

[0032] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0033] Figure 8 for Figure 1 A cross-sectional view of another embodiment of the lid;

[0034] Figure 9 for Figure 8 Enlarged view of point D in the middle.

[0035] Reference numerals: 100, micro-pressure valve; 10, upper valve body; 11, air outlet; 12, fixing part; 13, top cover part; 131, central area; 132, edge area; 14, side wall part; 20, lower valve body; 21, air inlet; 22, mating part; 221, limiting groove; 30, valve core; 31, first clearance hole; 40, steam passage; 50, first cavity; 60, second cavity; 200, cover body; 201, assembly hole; 300, handle; 301, handle part; 302, extension part; 303, second clearance hole. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0041] Cooking appliances, such as electric slow cookers, include a pot body, a cooking cavity, an inner pot located within the cooking cavity, and a lid for covering the cooking cavity. To maintain a low-pressure state within the cooking cavity, existing technologies incorporate a low-pressure valve on the lid. This valve is sealed to the lid and contains a movable floating element. When the pressure is low, the floating element seals the vent, maintaining a low-pressure state within the cooking cavity. When the pressure is high and exceeds the resistance of the floating element's upward movement, the sealing element is pushed up, releasing the pressure within the cooking cavity. However, this structure is complex. When the floating element is not depressurized, the entire cooking cavity remains sealed, which can easily lead to seal failure between the low-pressure valve and the lid or reduce its lifespan.

[0042] To solve the above problems, such as Figures 1 to 8 As shown, this utility model provides a micro-pressure valve, a lid, and a cooking utensil. The micro-pressure valve has a simple structure and high reliability.

[0043] like Figure 1 , Figure 3 and Figure 4 As shown, specifically, the micro-pressure valve 100 includes a valve body and a valve core 30. The valve body is provided with an air outlet 11; the valve core 30 is disposed on the valve body, and a steam channel 40 is formed on the valve core 30. The cross-sectional area S of the steam channel 40 satisfies: 10mm² 2 ≤S≤125mm 2 Where S can be 10mm 2 20mm 2 30mm 2 40mm 2 50mm 2 60mm 2 70mm 2 80mm 2 90mm 2 100mm 2 110mm 2 120mm 2 125mm 2 Waiting at 10mm 2 Up to 125mm 2 Any value within the range.

[0044] The micro-pressure valve 100 can be used in cooking appliances with cooking cavities, such as electric slow cookers and electric stew pots, or in other devices that require a micro-pressure environment. For ease of description, the following description takes the example of the micro-pressure valve 100 being installed on the cover 200 of the cooking appliance. The cover 200 has an assembly hole 201, and the micro-pressure valve 100 is installed in the assembly hole 201.

[0045] In the micro-pressure valve 100 provided in this embodiment of the utility model, the gas in the cooking cavity can be discharged through the steam channel 40 and the vent 11; by limiting S≤125mm 2 This ensures that steam can accumulate within the cooking cavity to form and maintain a micro-pressure, thereby improving cooking performance. It also prevents the micro-pressure environment from failing to form due to an excessively large cross-sectional area S of the steam channel 40, or from becoming too large overall in the micro-pressure valve 100; simultaneously, S is limited to ≥ 10 mm. 2 This ensures that the steam in the cooking chamber can be discharged normally through the steam channel 40, avoiding excessive pressure in the cooking chamber or the entire cooking chamber being in a closed state due to the small cross-sectional area S of the steam channel 40, which could easily damage or cause the micro-pressure valve 100 to fail. This reduces safety hazards, improves the reliability of the micro-pressure valve 100, and extends its service life. When the cross-sectional area S of the steam channel 40 is within the above range, a micro-pressure environment of 0.4 kPa can be formed inside the cooking chamber when the cooking appliance is boiling, improving the cooking effect and cooking speed. Furthermore, the micro-pressure valve 100 has a simple structure, and the components are relatively fixed, which facilitates processing and assembly and reduces costs.

[0046] Preferably, the cross-sectional area S of the steam channel 40 satisfies: 10 mm² 2 ≤S≤50mm 2 For example, 10mm 2 15mm 2 20mm 2 25mm 2 30mm 2 35mm 2 40mm 2 45mm 2 50mm 2 Waiting at 10mm 2 Up to 50mm 2 Any value within the range. Thus, when the cross-sectional area S of the steam channel 40 is within the aforementioned preferred range, a higher micro-pressure environment can be formed inside the cooking chamber when the cooking appliance is boiling, further improving the cooking effect and speed. For example, when S satisfies 30mm... 2 The cooking cavity can create a micro-pressure environment of 1.8 kPa.

[0047] like Figures 3 to 4As shown, in one embodiment, the valve body includes an upper valve body 10 and a lower valve body 20. The upper valve body 10 is provided with an air outlet 11 and a fixing part 12. The lower valve body 20 is provided with an air inlet 21 and a mating part 22. The valve core 30 is located between the air inlet 21 and the air outlet 11. The valve core 30 has a first clearance hole 31. One of the fixing part 12 or the mating part 22 passes through the first clearance hole 31 and is fixedly connected to the other, forming a steam channel 40 between the fixing part 12 and the inner wall of the first clearance hole 31. The gas in the cooking chamber can be discharged sequentially through the air inlet 21, the steam channel 40, and the air outlet 11. The air inlet 21 and the air outlet 11 can play a rectifying role, reducing the turbulence of steam entering the steam channel 40 from the cooking chamber and being discharged to the outside from the air outlet 11, so that the steam can flow smoothly and reduce the impact on the valve core 30. Furthermore, compared to directly machining a small-area exhaust hole on the valve core 30, the steam channel 40 formed between the fixing part 12 or the mating part 22 and the inner wall of the first clearance hole 31 can increase the cross-sectional size of the first clearance hole 31, making the machining process simpler. Moreover, the steam channel 40 is roughly annular, which allows the airflow through the steam channel 40 to be relatively dispersed and overflow, avoiding the formation of a single concentrated airflow.

[0048] like Figure 4 As shown, a first cavity 50 is formed between the valve core 30 and the lower valve body 20, and a second cavity 60 is formed between the valve core 30 and the upper valve body 10. The first cavity 50 and the second cavity 60 are connected by a steam passage 40. Gas in the cooking chamber can be discharged sequentially through the air inlet 21, the first cavity 50, the steam passage 40, the second cavity 60, and the air outlet 11. The first cavity 50 and the second cavity 60 can act as a buffer, further reducing the impact on the valve core 30, so that the steam can flow smoothly.

[0049] Of course, in other embodiments, the valve body may only include the upper valve body 10, with a first cavity 50 formed between the valve core and the upper valve body 10, and the upper valve body 10 is provided with an air outlet 11. Gas in the cooking chamber can be discharged sequentially through the steam channel 40, the first cavity 50, and the air outlet 11. Alternatively, the valve body may only include the lower valve body 20, with a second cavity 60 formed between the valve core and the lower valve body 20, and the lower valve body 20 is provided with an air inlet 21, which in this case also serves as the air outlet 11 of the valve body. Gas in the cooking chamber can be discharged sequentially through the air inlet 21, the second cavity 60, and the steam channel 40. The individual first cavity 50 and second cavity 60 can also achieve uniform airflow and stable gas output.

[0050] like Figures 4 to 6As shown, in one embodiment, the valve core 30 is fixed to the upper valve body 10 or the lower valve body 20. In the illustrated embodiment, the valve core 30 is fixed to the lower valve body 20. After the valve core 30 is fixed to the upper valve body 10 or the lower valve body 20, it can be installed as a whole, thereby reducing the number of parts and simplifying the assembly steps. The valve core 30 can be integrally formed with the upper valve body 10 or the lower valve body 20, or it can be a separate structure and sealed and fixed by screws, adhesives, or other methods, as long as the sealing performance and connection reliability between the valve core 30 and the upper valve body 10 or between the valve core 30 and the lower valve body 20 can be ensured. This embodiment of the present invention does not impose specific limitations. Of course, in other embodiments, the valve core 30 can also be directly fixedly connected to the cover 200.

[0051] like Figure 2 and Figure 4 As shown, in one embodiment, the upper valve body 10 includes a top cover portion 13 and a side wall portion 14 connected to the top cover portion 13. The top cover portion 13 includes a central region 131 and an edge region 132 located around the central region 131. A fixing portion 12 is provided in the central region 131, and an exhaust port 11 is provided in the edge region 132. Thus, after steam enters the second cavity 60 from the steam channel 40 near the center, it can diffuse outward to the edge region 132 and be discharged through the exhaust port 11 located in the edge region 132. Compared to exhausting from the exhaust port located in the central region 131, the discharged steam is more dispersed, avoiding steam accumulation and thus optimizing the exhaust path. In the illustrated embodiment, there can be multiple exhaust ports 11, which are arranged at circumferential intervals along the edge region 132.

[0052] like Figure 4 As shown, further, the area where the orthographic projection of the steam channel 40 on the top cover 13 is located is within the central area 131. In this way, the steam channel 40 is completely misaligned with the vent 11, that is, the vent 11 is located outside the area where the orthographic projection of the steam channel 40 on the top cover 13 is located, which prevents a single stream of air from overflowing directly from the vent 11, reduces the impact of the airflow, further improves the steam dispersion effect, and also prevents condensate or external water vapor at the vent 11 from dripping directly into the lower valve body 20 through the vent 11 and the steam channel 40.

[0053] Of course, in other embodiments, the area where the orthographic projection of the steam passage 40 on the top cover 13 is located may be partially located in the central region 131 and partially located in the edge region 132; or, the vent 11 may also be located in the central region 131 as needed, as long as the normal operation of the micro-pressure valve 100 can be ensured. This utility model embodiment does not impose specific limitations here.

[0054] like Figure 4As shown, in one embodiment, the air inlet 21 can also be located in the area near the edge of the lower valve body 20, for example, the air inlet 21 is located outside the area where the orthographic projection of the steam channel 40 is on the lower valve body 20. There can be multiple air inlets 21, arranged at intervals along the circumference of the lower valve body 20. Thus, by defining the relative positions of the air inlets 21, the steam channel 40, and the air outlet 11, it is possible to prevent liquid or food in the cooking chamber from overflowing from the micro-pressure valve 100. Even if some liquid or food enters the first cavity 50 through the air inlet 21, it will preferentially flow back into the cooking chamber through the air inlet 21. Simultaneously, it also prevents condensate or external moisture in the micro-pressure valve 100 from flowing back into the cooking chamber through the air inlet 21. Of course, in other embodiments, the air inlet 21 can also be located in the area near the center of the lower valve body 20 as needed, as long as the normal operation of the micro-pressure valve 100 can be ensured. This embodiment of the present invention does not impose specific limitations here.

[0055] like Figures 4 to 5 As shown, in one embodiment, the fixing part 12 is a screw post, and the mating part 22 is a fixing hole. The fixing part 12 and the mating part 22 are fixedly connected by fasteners. The fasteners can be screws, bolts, etc. Thus, the fastener passes through the fixing hole from the end of the lower valve body 20 away from the upper valve body 10 and is fixed to the screw post by thread engagement, avoiding exposed fasteners and improving the aesthetics of the micro-pressure valve 100. The fasteners fixing the upper valve body 10 and the lower valve body 20 ensure the stability and reliability of their connection. The fasteners tighten the two together, improving the sealing between the upper valve body 10 and the lower valve body 20, preventing steam leakage. Furthermore, the detachable connection of the upper valve body 10 and the lower valve body 20 facilitates processing and assembly, as well as later maintenance and cleaning. Specifically, the mating part 22 is provided with a limiting groove 221 at one end facing the upper valve body 10. The end of the screw post is inserted into the limiting groove 221 to prevent relative displacement between the upper valve body 10 and the lower valve body 20. At the same time, it can also pre-position the upper valve body 10 and the lower valve body 20 to facilitate user assembly.

[0056] In another embodiment, the mating part 22 can be a screw post, and the fixing part 12 can be a fixing hole. The fastener passes through the fixing hole from the end of the upper valve body 10 away from the lower valve body 20 and is fixed with the screw post by thread engagement. Of course, in other embodiments, the fixing part 12 and the mating part 22 can also be fixedly connected by other methods such as snap-fit, plug-in, or adhesive, as long as the stability and reliability of the connection between the two can be guaranteed. This embodiment of the present invention does not impose specific limitations here.

[0057] like Figure 1 and Figure 4As shown, this embodiment of the present invention also provides a lid, including a lid body 200 and the aforementioned micro-pressure valve 100. The lid body 200 is provided with an assembly hole 201, and the micro-pressure valve 100 is installed in the assembly hole 201. This lid can be used in cooking appliances with cooking cavities such as electric slow cookers and electric stew pots, and can also be used in other devices that require a micro-pressure environment. Devices using this lid can achieve the formation of a micro-pressure environment inside the device. The assembly hole 201 facilitates the installation of the micro-pressure valve 100. The lid body 200 can be made of glass, or other high-temperature resistant materials such as ceramic or stainless steel; this embodiment of the present invention does not impose specific limitations.

[0058] like Figure 1 and Figure 3 As shown, the lid also includes a handle 300, which is fixed to the top of the lid body 200. The handle 300 allows the user to easily grip the lid, making it convenient and safe to use. The handle 300 can be fixed to the lid body 200 by fasteners, snap-fit, adhesive, or other methods, as long as the stability and reliability of the connection between the two can be guaranteed. This embodiment of the invention does not impose specific limitations here.

[0059] like Figures 3 to 4 As shown, in one embodiment, the valve core 30 is fixed to the upper valve body 10 or the lower valve body 20. The upper valve body 10 and the lower valve body 20 sandwich the edge of the mounting hole 201 of the cover 200 to fix the micro-pressure valve 100 to the cover 200 and seal the space between the upper valve body 10 and the cover 200, as well as between the lower valve body 20 and the cover 200, to prevent steam leakage. Thus, the size of the mounting hole 201 can be relatively large, making the processing technology of the cover 200 simpler. Of course, when the valve core 30 is fixed to the upper valve body 10 or the lower valve body 20, the micro-pressure valve 100 can also be integrally disposed within the mounting hole 201, with a seal between the upper valve body 10 and the lower valve body 20, and a seal between the outer wall of the micro-pressure valve 100 and the inner wall of the mounting hole 201.

[0060] like Figures 6 to 7 As shown, in another embodiment, the upper valve body 10 and the lower valve body 20 sandwich a cover 200, such that a portion of the cover 200 is located between the air inlet 21 and the air outlet 11 and forms a valve core 30, with the assembly hole 201 forming a first clearance hole 31. Using a portion of the cover 200 as the valve core 30 and the assembly hole 201 as the first clearance hole 31 further simplifies the structure of the micro-pressure valve 100 and the cover 200, reduces the number of parts, facilitates processing and assembly, and lowers costs.

[0061] like Figures 8 to 9As shown, in another embodiment, the handle 300 includes a handle portion 301 and an extension portion 302 integrally formed with the handle portion 301. The extension portion 302 is provided with a second clearance hole 303. The upper valve body 10 and the lower valve body 20 sandwich the cover body 200 and the extension portion 302. One of the fixing portion 12 or the mating portion 22 passes through the second clearance hole 303 and is fixedly connected to the other, and a steam channel 40 is formed between the fixing portion 12 and the inner wall of the second clearance hole 303. The air inlet 21 communicates with the air outlet 11 through the steam channel 40. Thus, compared to directly machining a small-area exhaust hole on the micro-pressure valve 100 or the cover 200, the steam channel 40 formed between one of the fixing part 12 or the mating part 22 and the inner wall of the second clearance hole 303 on the extension 302 of the handle 300 allows for machining a relatively large cross-sectional area second clearance hole 303 on the extension 302 of the handle 300, and a larger cross-sectional area mounting hole 201 on the cover 200, making the machining process simpler. Furthermore, to ensure the heat insulation effect of the handle 300, the handle 300 is usually made of plastic, while to allow the user to clearly observe the cooking situation inside the cooking cavity through the cover 200, the cover 200 is usually made of glass. Therefore, machining the second clearance hole 303 on the handle 300 is also more convenient.

[0062] This utility model embodiment also provides a cooking appliance, including the aforementioned lid. This cooking appliance can create a micro-pressure environment within the cooking cavity to improve cooking efficiency and food texture, thereby enhancing the cooking effect. The cooking appliance can be an electric slow cooker, electric stew pot, etc.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A micro-pressure valve, characterized in that, include: Valve body, wherein the valve body is provided with an air outlet (11). A valve core (30) is disposed on the valve body, and a steam passage (40) is formed on the valve core (30). The cross-sectional area S of the steam passage (40) satisfies: 10 mm. 2 ≤S≤125mm 2 .

2. The micro-pressure valve according to claim 1, characterized in that, The cross-sectional area S of the steam channel (40) satisfies: 10 mm 2 ≤S≤50mm 2 .

3. The micro-pressure valve according to claim 1, characterized in that, The valve body includes an upper valve body (10) and a lower valve body (20). The upper valve body (10) is provided with the air outlet (11) and the upper valve body (10) is provided with a fixing part (12). The lower valve body (20) is provided with an air inlet (21) and a mating part (22); the valve core (30) is located between the air inlet (21) and the air outlet (11); The valve core (30) has a first clearance hole (31), one of the fixing part (12) or the mating part (22) passes through the first clearance hole (31) and is fixedly connected to the other, forming the steam passage (40) between the valve core (31) and the inner wall of the first clearance hole (31).

4. The micro-pressure valve according to claim 3, characterized in that, The valve core (30) is fixed to the upper valve body (10) or the lower valve body (20).

5. The micro-pressure valve according to claim 3, characterized in that, The upper valve body (10) includes a top cover (13) and a side wall (14) connected to the top cover (13). The top cover (13) includes a central region (131) and an edge region (132) located around the central region (131). The fixing part (12) is located in the central region (131), and the air outlet (11) is located in the edge region (132). The area where the orthographic projection of the steam passage (40) on the top cover (13) is located is within the central region (131).

6. The micro-pressure valve according to claim 3, characterized in that, The fixing part (12) is a screw post, the mating part (22) is a fixing hole, and the fixing part (12) and the mating part (22) are fixedly connected by fasteners.

7. A lid, characterized in that, include: Cover (200), wherein the cover (200) is provided with mounting holes (201); as well as The micro-pressure valve according to any one of claims 1 to 6 is installed in the assembly hole (201).

8. The lid according to claim 7, characterized in that, The valve body includes an upper valve body (10) and a lower valve body (20). The upper valve body (10) is provided with the air outlet (11) and the upper valve body (10) is provided with a fixing part (12). The lower valve body (20) is provided with an air inlet (21) and a mating part (22); the valve core (30) is located between the air inlet (21) and the air outlet (11); The valve core (30) has a first clearance hole (31). The upper valve body (10) and the lower valve body (20) sandwich the cover (200) so that the cover (200) is partially located between the air inlet (21) and the air outlet (11) and forms the valve core (30). The assembly hole (201) forms the first clearance hole (31). One of the fixing part (12) or the mating part (22) passes through the first clearance hole (31) and is fixedly connected to the other, forming the steam passage (40) between the fixing part (12) and the inner wall of the first clearance hole (31).

9. The lid according to claim 7, characterized in that, It also includes a handle (300), which includes a handle portion (301) and an extension portion (302) integrally formed with the handle portion (301). The extension portion (302) is provided with a second clearance hole (303). The valve body includes an upper valve body (10) and a lower valve body (20). The upper valve body (10) is provided with an air outlet (11) and a fixing portion (12). The lower valve body (20) is provided with an air inlet (21) and a mating portion (22). The upper valve body (10) and the lower valve body (20) sandwich the cover body (200) and the extension (302). One of the fixing part (12) or the mating part (22) passes through the second clearance hole (303) and is fixedly connected to the other, and forms the steam channel (40) between the fixing part (12) and the inner wall of the second clearance hole (303). The air inlet (21) communicates with the air outlet (11) through the steam channel (40).

10. A cooking utensil, characterized in that, Includes the lid as described in any one of claims 7 to 9.

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