Pressure Cooking Appliances

Abstract

The present invention provides a pressure cooking device, comprising: a pot body for holding food to be cooked; a pot cover, the pot cover is arranged on the pot body, the pot cover is provided with an exhaust channel and a pressure limiting valve matched with the exhaust channel, the pressure limiting valve comprises a pressure limiting valve body and a counterweight, the counterweight comprises a first shell and a second shell, the first shell is sleeved outside the second shell, wherein the first shell is provided with an exhaust hole, the second shell is provided with an exhaust convex portion extending toward the first shell, after the first shell is sleeved on the second shell, the exhaust convex portion is inserted into the exhaust hole. The technical solution of the present invention solves the problem that water easily accumulates in the counterweight of the electric pressure cooker in the prior art.

Description

Technical Field

[0001] The present invention relates to a pressure cooking appliance, and in particular to an improvement of a pressure limiting valve of the pressure cooking appliance. Background Art

[0002] Electric pressure cookers are commonly used cooking appliances. Some electric pressure cookers have an adjustable counterweight at the pressure limiting valve to achieve multi-stage pressure regulation. Furthermore, in order to ensure that the counterweight is small and has a certain weight, and considering the difficulty of processing, the counterweight is usually formed by connecting two shells of different materials together. The above-mentioned electric pressure cookers have the following problems:

[0003] There is a gap between the two shells of the counterweight block. Therefore, during the exhaust process of the pressure limiting valve, steam will enter the counterweight block through the gap and accumulate water inside the counterweight block. It is extremely difficult to clean the accumulated water, and an odor problem will occur after long-term use. Summary of the invention

[0004] The main purpose of the present invention is to provide a pressure cooking device to solve the problem of water accumulation in the counterweight block of the electric pressure cooker in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a pressure cooking device, comprising: a pot body for holding food to be cooked; a pot cover, the pot cover is arranged on the pot body, the pot cover is provided with an exhaust channel and a pressure limiting valve cooperating with the exhaust channel, the pressure limiting valve comprises a pressure limiting valve body and a counterweight block, the counterweight block comprises a first shell and a second shell, the first shell is sleeved outside the second shell, wherein the first shell is provided with an exhaust hole, and the second shell is provided with an exhaust protrusion extending toward the first shell, after the first shell is sleeved on the second shell, the exhaust protrusion is inserted into the exhaust hole.

[0006] By applying the technical solution of the present invention, when the pressure cooking device is working, steam is discharged from the exhaust structure and enters the first shell. The steam is then discharged directly to the outside of the counterweight along the exhaust pipe, and the steam is prevented from entering the gap between the first shell and the second shell from the exhaust hole, thereby preventing water from accumulating in the counterweight. Therefore, the technical solution of the present invention solves the problem of water easily accumulating in the counterweight of the electric pressure cooker in the prior art.

[0007] Further, the end of the exhaust protrusion is flush with the outer surface of the first shell, or the end of the exhaust protrusion protrudes from the outer surface of the first shell.

[0008] Furthermore, the first shell and the second shell are both cap-shaped structures, the exhaust hole is arranged on the bottom wall of the first shell, and the exhaust protrusion is arranged on the bottom wall of the second shell.

[0009] Furthermore, there are a plurality of exhaust holes and a plurality of exhaust protrusions, and the plurality of exhaust holes and the plurality of exhaust protrusions are arranged in one-to-one correspondence.

[0010] Further, a plurality of exhaust holes are arranged at intervals along the circumferential direction of the first shell.

[0011] Furthermore, the first shell is made of metal material, the second shell is made of plastic material, and the second shell is provided with a connection and matching structure that matches with the pressure-limiting valve body.

[0012] Furthermore, the second shell is formed by an integral injection molding process and connected to the first shell.

[0013] Furthermore, the pressure cooking appliance comprises: a magnetic mechanism, which is arranged on the pot cover, and the magnetic mechanism attracts the counterweight block to separate from the pressure limiting valve body.

[0014] Furthermore, the magnetic mechanism includes: a first magnetic part, which is arranged on a counterweight block; a second magnetic part, which is arranged in a pot cover, and the pressure cooking appliance also includes a moving mechanism and a driving mechanism arranged in the pot cover, wherein the second magnetic part is arranged on the moving mechanism, and the moving mechanism has a first position and a second position. When the moving mechanism is in the first position, the first magnetic part and the second magnetic part are arranged correspondingly, and when the moving mechanism is in the second position, the first magnetic part and the second magnetic part are arranged staggered, and the driving mechanism cooperates with the moving mechanism and drives the moving mechanism to move between the first position and the second position.

[0015] Furthermore, the pressure cooking appliance is an electric pressure cooker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an embodiment of a cooking utensil according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A schematic diagram of the structure of the inner pot cover of a medium pressure cooking device;

[0019] Figure 3 Shows Figure 1 A schematic cross-sectional view of an inner pot lid of a medium pressure cooking device;

[0020] Figure 4 Shows Figure 3 The enlarged schematic diagram at A in the middle;

[0021] Figure 5 Shows Figure 1A schematic cross-sectional view of a pressure limiting valve body and a counterweight of a medium pressure cooking appliance;

[0022] Figure 6 Shows Figure 5 The enlarged schematic diagram of point B in the middle;

[0023] Figure 7 Shows Figure 1 An exploded schematic diagram of a pressure limiting valve body and a counterweight block of a medium pressure cooking appliance;

[0024] Figure 8 Shows Figure 7 A schematic structural diagram of the middle pressure limiting valve body and the counterweight block from another angle;

[0025] Fig. 9 Shows Figure 1 A schematic diagram of the structure of a counterweight block of a medium pressure cooking device;

[0026] Fig.10 Shows Figure 1 A schematic cross-sectional view of a counterweight for a medium pressure cooking device;

[0027] Fig.11 Shows Figure 1 An exploded schematic diagram of a counterweight for a medium pressure cooking apparatus;

[0028] Fig.12 Shows Fig.11 A schematic diagram of the structure of the middle counterweight block from another angle;

[0029] Fig.13 Shows Fig.12 The enlarged schematic diagram at C in the middle;

[0030] Fig.14 Shows Figure 1 A schematic top view of the inner liner of a medium pressure cooking vessel;

[0031] Fig.15 Shows Figure 1 A schematic diagram of the structure coordination inside the pot cover when the moving structure of the medium pressure cooking appliance is in the first position;

[0032] Fig.16 Shows Fig.15 A schematic cross-sectional view of a pot lid of a medium pressure cooking device;

[0033] Fig.17 Shows Fig.16 The enlarged schematic diagram at D in the middle;

[0034] Fig.18 Shows Figure 1 A schematic diagram of the structure coordination inside the pot cover when the moving structure of the medium pressure cooking appliance is in the second position;

[0035] Fig.19 Shows Fig.18 A schematic cross-sectional view of a lid of a pressure cooking apparatus; and

[0036] Fig. 20 Shows Fig.19 Enlarged schematic diagram at point E in the middle.

[0037] The above drawings include the following reference numerals:

[0038] L1, first positioning gap; L2, second positioning gap; 10, pot body; 20, pot cover; 21, upper cover; 211, lining; 212, surface cover; 22, inner pot cover; 221, valve seat; 222, second convex rib; 30, exhaust channel; 40, pressure limiting valve; 41, pressure limiting valve body; 411, first convex rib; 4111, first plate section; 4112, second plate section; 412, lifting slope; 413, push handle; 42, counterweight; 421, first shell; 4211, mounting recess; 4212, exhaust hole; 42 13. Positioning rib; 422. Second shell; 4221. Exhaust convex portion; 4222. Positioning step; 4223. Positioning groove; 423. First positioning notch; 424. Second avoidance notch; 50. Magnetic mechanism; 51. First magnetic component; 52. Second magnetic component; 60. Anti-slip structure; 61. First threaded section; 62. Second threaded section; 70. Abutment structure; 71. Abutment rib; 80. Moving mechanism; 81. Positioning boss; 90. Driving mechanism; 101. First position-limiting column; 102. Second position-limiting column. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] like Figure 1 ,as well as Figures 15 to 20 As shown, the pressure cooking device of this embodiment includes a pot body 10, a pot cover 20, a pressure limiting valve 40 and a magnetic mechanism 50. The pot body 10 is used to hold the food to be cooked. The pot cover 20 is covered on the pot body 10, and the pot cover 20 is provided with an exhaust passage 30. The pressure limiting valve 40 cooperates with the exhaust passage 30, and the pressure limiting valve 40 includes a pressure limiting valve body 41 and a counterweight 42. The magnetic mechanism 50 is arranged on the pot cover 20, and the magnetic mechanism 50 attracts the counterweight 42 to separate from the pressure limiting valve body 41.

[0043] Specifically, the above structure can realize the two-stage pressure regulation function, and its specific principle is: when the magnetic mechanism 50 acts on the counterweight 42, the magnetic mechanism 50 absorbs the counterweight 42 and makes the counterweight 42 separate from the pressure-limiting valve body 41, at this time, the counterweight 42 does not apply pressure to the pressure-limiting valve body 41, and the pressure applied by the pressure-limiting valve body 41 to the exhaust channel 30 is the first exhaust pressure. When the magnetic mechanism 50 does not act on the counterweight 42, the counterweight 42 falls by gravity and cooperates with the pressure-limiting valve body 41, and the counterweight 42 applies pressure to the pressure-limiting valve body 41. At this time, the pressure applied by the counterweight 42 and the pressure-limiting valve body 41 to the exhaust channel 30 is the second exhaust pressure. It can be seen that the above structure can control the pressure-limiting valve 40 to switch between the first exhaust pressure and the second exhaust pressure by controlling whether the magnetic mechanism absorbs the counterweight 42, thereby realizing the two-stage pressure regulation function, so that the cooking method of the pressure cooking appliance is more flexible.

[0044] like Figures 2 to 5 , Fig.15 , Fig.17 , Fig.18 as well as Fig. 20As shown, in the technical solution of this embodiment, a first magnetic member 51 is provided on the counterweight 42, and the magnetic mechanism 50 includes a second magnetic member 52, and the second magnetic member 52 is provided in the pot cover 20. Specifically, the second magnetic member 52 can apply a magnetic force to the first magnetic member 51 and then lift the counterweight 42 by gravity. Further, the second magnetic member 52 can be driven to move by setting a swing rod structure, so as to achieve the second magnetic member 52 to apply a magnetic force to the first magnetic member 51, or to make the magnetic force applied by the second magnetic member 52 to the first magnetic member 51 smaller and unable to lift the counterweight 42. Alternatively, the second magnetic member 52 is located above the first magnetic member 51 and is stationary. At this time, the second magnetic member 52 is an electromagnet. When the second magnetic member 52 is energized, the second magnetic member 52 can attract the first magnetic member 51, and when the second magnetic member 52 is not energized, the second magnetic member 52 does not attract the first magnetic member 51. Further, the first magnetic member 51 in this embodiment can be replaced with a metal member that can be attracted, such as iron. Optionally, the metal piece and the counterweight 42 may be an integral structure.

[0045] like Fig.11 and Fig.12 As shown, in the technical solution of this embodiment, the counterweight 42 includes a first shell 421 and a second shell 422 connected to each other, wherein the first shell 421 is made of metal material, the second shell 422 is made of plastic material, and the second shell 422 is provided with a connection and matching structure that matches the pressure limiting valve body 41. Specifically, the first shell 421 is located above the second shell 422. Among them, the above-mentioned connection and matching structure can be an anti-slip structure, or a positioning structure, etc. The advantage of the above-mentioned structure is that by setting the first shell 421 to be made of metal material, it can be ensured that the counterweight 42 has a certain weight, thereby ensuring that the volume of the counterweight 42 is not too large. By setting the second shell 422 to be made of plastic material, it is convenient to form a connection and matching structure on the second shell 422, that is, the above-mentioned connection and matching structure can be formed by injection molding. On the contrary, if the counterweight 42 is made entirely of metal material, although the overall weight of the counterweight 42 can be guaranteed, for the connection and matching structure, each metal counterweight 42 needs to be processed separately (for example, threading, processing positioning bosses, etc.), the manufacturing process is complicated and the cost is high. If the counterweight 42 is made entirely of plastic, it is convenient to set up the connection and matching structure, but the overall weight of the counterweight 42 is relatively light, and the volume of the counterweight 42 needs to be made large to achieve the corresponding weight. It can be seen that the structure of the counterweight 42 not only ensures that the counterweight has a certain weight in a small volume, but also ensures that the connection and matching structure is easy to form, simplifying the process difficulty.

[0046] Further preferably, the first shell 421 in the present embodiment is made of stainless steel. Specifically, the characteristic of stainless steel is that it cannot be attracted by a magnet, and stainless steel has a certain weight. The above structure allows the magnetic force between the two to lift the counterweight 42 only when the second magnetic member 52 is close enough to the first magnetic member 51. At the same time, since the first shell 421 made of stainless steel cannot be attracted, when the second magnetic member 52 is misaligned relative to the first magnetic member 51, the magnetic force between the two is weakened, and the counterweight 42 falls onto the pressure limiting valve body 41. On the contrary, if the first shell 421 is made of iron (or other metals that can be attracted), the second magnetic member 52 will be slightly close to the pressure limiting valve 40, and the counterweight 42 will be attracted and lifted. Therefore, the above structure can reduce the offset position of the second magnetic member 52, thereby saving the space arrangement in the pot cover 20. Of course, the first shell 421 is not limited to being made of stainless steel, and the first shell 421 can also be made of other metal materials that cannot be attracted by magnetic members and have a certain weight.

[0047] like Figures 9 to 12 As shown, in the technical solution of this embodiment, the first shell 421 and the second shell 422 are both cap-shaped structures, the first shell 421 is sleeved outside the second shell 422, and the second shell 422 is sleeved outside the pressure limiting valve body. The cap-shaped structure means that the first shell 421 and the second shell 422 have an annular side wall and a bottom wall, so that the first shell 421 and the second shell 422 are both formed into a hat-like shape. Fig.10 It can be seen that the first shell 421 is sleeved outside the second shell 422 , and the above-mentioned connection and matching structure is arranged on the inner side wall of the second shell 422 .

[0048] like Figures 10 to 12 As shown, in the technical solution of this embodiment, the first magnetic member 51 is sandwiched between the first shell 421 and the second shell 422. Specifically, the above structure enables the first magnetic member 51 to be fixed between the first shell 421 and the second shell 422, and prevents the first magnetic member 51 from falling off and being lost after the product is used for a long time. Fig.10 It can be seen that the first magnetic member 51 is sandwiched between the bottom wall of the first shell 421 and the top wall of the second shell 422. Of course, the first magnetic member 51 can also be sandwiched between the side wall of the first shell 421 and the side wall of the second shell 422.

[0049] like Figures 10 to 12As shown, in the technical solution of this embodiment, a mounting recess 4211 is provided on the inner side of the bottom wall of the first shell 421, and the first magnetic member 51 is embedded in the mounting recess 4211. At the same time, the second shell 422 is connected to the first shell 421 through an integral injection molding process. Specifically, the mounting recess 4211 is provided at the center of the inner surface of the bottom wall of the first shell 421. The above structure has the following advantages: when the second shell 422 is injection molded, the stainless steel first shell 421 is first placed in the mold cavity, and then the first magnetic member 51 is placed and embedded in the mounting recess 4211. At this time, the first magnetic member 51 attracts the metal mold cavity and fixes the first shell 421 in the mold cavity. Then the injection molding liquid is poured into the mold cavity, and the second shell 422 is molded and connected to the first shell 421. It can be seen that the above-mentioned mounting recess 4211 plays a role in positioning the first magnetic member 51 on the one hand. On the other hand, the above-mentioned installation recessed portion 4211 can also assist in positioning the first shell 421 during the molding process of the second shell 422 .

[0050] like Figures 10 to 12 As shown, in the technical solution of this embodiment, the first shell 421 is provided with an exhaust hole 4212, and the second shell 422 is provided with an exhaust convex portion 4221 extending toward the first shell 421. After the first shell 421 is sleeved on the second shell 422, the exhaust convex portion 4221 is inserted into the exhaust hole 4212. Specifically, from Fig.12 It can be seen that a columnar structure is provided on the outer surface of the second shell 422, and a vent hole is provided inside the columnar structure, and the vent hole is connected to the inside of the second shell 422. The columnar structure forms an exhaust convex portion 4221. When the first shell 421 is sleeved on the second shell 422, the exhaust convex portion 4221 is inserted into the exhaust hole 4212. Fig.10 It can be seen that the upper end surface of the exhaust convex portion 4221 is flush with the end surface of the first shell 421. The advantage of the above structure is that since the first shell 421 is sleeved outside the second shell 422, there is a gap between the first shell 421 and the second shell 422. If only the exhaust hole structure is provided on the first shell 421 and the second shell 422, steam may penetrate into the gap between the first shell 421 and the second shell 422 during the exhaust of the counterweight 42. The above situation will cause water to accumulate in the first shell 421 and the second shell 422, and the above-mentioned accumulated water cannot be discharged and is extremely difficult for the user to clean, which will cause the product to emit odor after long-term use. In this embodiment, the exhaust convex portion 4221 is provided on the second shell 422. When the counterweight 42 is exhausted, the steam is discharged along the exhaust convex portion 4221, and the steam will not enter the gap between the first shell 421 and the second shell 422.

[0051] like Figures 10 to 12 As shown, in the technical solution of this embodiment, the exhaust hole 4212 is arranged on the bottom wall of the first shell 421, and the exhaust protrusion 4221 is arranged on the bottom wall of the second shell 422. Specifically, the exhaust protrusion 4221 is arranged on the outer surface of the bottom wall of the second shell 422, and the exhaust protrusion 4221 extends toward the first shell 421. The above structure makes it easy to insert the exhaust protrusion 4221 into the exhaust hole 4212 when the first shell 421 and the second shell 422 are nested together. At the same time, during the process of injection molding the second shell 422, the above structure also facilitates the demolding operation. Of course, in the case of setting a core pull during injection molding, the above-mentioned exhaust hole 4212 and the exhaust protrusion 4221 can also be respectively arranged on the side wall of the first shell 421 and the side wall of the second shell 422.

[0052] like Fig.12 As shown, in this embodiment, the exhaust hole 4212 is a waist-shaped hole, and the exhaust protrusion 4221 is a waist-shaped column that matches the waist-shaped hole.

[0053] like Fig.11 and Fig.12 As shown, in the technical solution of this embodiment, there are multiple exhaust holes 4212, multiple exhaust protrusions 4221, and the multiple exhaust holes 4212 and the multiple exhaust protrusions 4221 are arranged in a one-to-one correspondence. Specifically, the above structure enables the exhaust holes 4212 and the exhaust protrusions 4221 to play a role in preventing the first shell 421 and the second shell 422 from rotating when the first shell 421 is sleeved on the second shell 422. In this embodiment, there are four exhaust holes 4212, and correspondingly, there are also four exhaust protrusions 4221.

[0054] Preferably, if Fig.12 As shown, a plurality of exhaust holes 4212 are arranged at intervals along the circumference of the first shell 421 .

[0055] like Figure 5 and Figure 6 ,as well as Fig.13As shown, in the technical solution of this embodiment, a positioning step 4222 is provided on the outer side wall of the second shell 422, and when the first shell 421 is sleeved outside the second shell 422, the end of the side wall of the first shell 421 is abutted against the step surface of the positioning step 4222. Specifically, the positioning step 4222 makes the outer side wall of the second shell 422 form a stepped structure with a large diameter section and a small diameter section, wherein the small diameter section is located on the upper side of the large diameter section. Further, when the first shell 421 is sleeved on the second shell 422, the side wall of the first shell 421 is sleeved outside the small diameter section of the second shell 422. At the same time, the end of the side wall of the first shell 421 is abutted against the step surface of the positioning step 4222. The above structure makes it possible for the outer side wall of the first shell 421 and the outer side wall of the second shell 422 to be flush with each other when the first shell 421 is sleeved outside the second shell 422, thereby improving the appearance of the counterweight 42.

[0056] like Figure 6 , Fig.11 as well as Fig.13 As shown, in the technical solution of this embodiment, a positioning groove 4223 is provided on the step surface of the positioning step 4222, and a positioning rib 4213 is provided at the end of the side wall of the first shell 421. When the first shell 421 is sleeved on the second shell 422, the positioning rib 4213 is inserted into the positioning groove 4223. Specifically, the positioning groove 4223 is an annular groove located on the inner side of the step surface of the positioning step 4222, and the positioning rib 4213 is an annular rib. When the first shell 421 is sleeved outside the second shell 422, the positioning rib 4213 is inserted into the positioning groove 4223, thereby improving the connection strength between the first shell 421 and the second shell 422. Further, the positioning step 4222 and the positioning groove 4223 are formed when the second shell 422 is injection molded.

[0057] like Figure 5 As shown, in the technical solution of this embodiment, an anti-slip structure 60 is provided between the counterweight 42 and the pressure-limiting valve body 41, and the anti-slip structure 60 prevents the counterweight 42 from slipping off the pressure-limiting valve body 41. Specifically, since the counterweight 42 can move up and down relative to the pressure-limiting valve body 41, there is a risk that the counterweight 42 will slip off the pressure-limiting valve body 41 during the process of the magnetic mechanism 50 lifting the counterweight 42. In this example, the anti-slip structure 60 is used to prevent the counterweight 42 from slipping off the pressure-limiting valve body 41.

[0058] like Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, the anti-slip structure 60 includes a first thread segment 61 and a second thread segment 62. The first thread segment 61 is arranged on the inner wall of the first housing 421, and the second thread segment 62 is arranged on the outer wall of the pressure limiting valve body 41. The first thread segment 61 forms the above-mentioned connection and matching structure. Specifically, in combination with Figure 5 and Figure 7 The installation process of the counterweight 42 and the pressure-limiting valve body 41 in this embodiment is as follows: first, the counterweight 42 is sleeved on the pressure-limiting valve body 41, at which time the first thread segment 61 is located above the second thread segment 62; rotate one of the counterweight 42 and the pressure-limiting valve body 41, and make the other of the two stationary, so that the first thread segment 61 and the second thread segment 62 are engaged with each other; continue to rotate the counterweight 42 or the pressure-limiting valve body 41, and make the first thread segment 61 and the second thread segment 62 disengage from each other, at which time the first thread segment 61 is located below the second thread segment. After the above steps, the counterweight 42 falls downward onto the pressure-limiting valve body 41. At the same time, due to the stopping effect of the first thread segment 61 and the second thread segment 62, the counterweight 42 cannot escape from the pressure-limiting valve body 41 from above, thereby achieving the anti-slip effect. In this embodiment, the height of the first thread segment 61 and the second thread segment 62 should not be too high, thereby ensuring that the counterweight 42 has enough space to move up and down. Preferably, the height of the first thread segment 61 and the height of the second thread segment 62 are less than or equal to 8 mm.

[0059] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the pot cover 20 includes an upper cover 21 and an inner pot cover 22 located at the lower side of the upper cover 21, and the exhaust passage 30 and the pressure limiting valve 40 are arranged on the inner pot cover 22. Specifically, when the pot cover 20 is covered on the pot body 10, the inner pot cover 22 cooperates with the pot body 10. At the same time, the exhaust passage 30 is an exhaust pipe, the lower end of the exhaust pipe is connected to the inside of the pot body, and the pressure limiting valve body 41 cooperates with the upper end of the exhaust pipe. The magnetic mechanism 50 is arranged in the upper cover 21.

[0060] like Fig.10 As shown, in the technical solution of this embodiment, an abutment matching structure 70 is provided on the upper surface of the pressure limiting valve 40 and / or the lower surface of the upper cover 21, so that when the pressure limiting valve 40 moves upward, the contact area between the pressure limiting valve 40 and the upper cover 21 is reduced. Specifically, for the structure of this embodiment, when the counterweight 42 is lifted, the upper surface of the counterweight 42 will come into contact with the lower surface of the upper cover 21. Since the pressure cooking appliance will exhaust during the cooking process, the steam will form a layer of water film between the upper surface of the counterweight 42 and the lower surface of the upper cover 21. Under the action of the tension of the water, the counterweight 42 may not be able to be reset normally, thereby making the two-stage pressure regulating function invalid. In this embodiment, the abutment matching structure 70 is provided on the upper surface of the counterweight 42 and / or the lower surface of the upper cover 21, thereby reducing the contact area between the counterweight 42 and the upper cover 21, and reducing the influence of the tension of the water, thereby ensuring that the counterweight 42 can be reset normally. Of course, the above structure is also generally applicable to conventional gravity pressure limiting valve structures. That is, the above structure can be used in a pressure-limiting valve structure that does not have a counterweight structure.

[0061] like Fig.10 As shown, in the technical solution of this embodiment, the upper surface of the pressure limiting valve 40 is an arched surface, and the arched surface forms an abutting matching structure 70. Specifically, the upper surface of the bottom wall of the first shell 421 is an arched surface. The above structure makes it possible for only the top of the arched surface to contact the lower surface of the upper cover 21 when the counterweight 42 rises, thereby greatly reducing the contact area between the counterweight 42 and the upper cover 21. In order to make the product beautiful, preferably, the height difference between the top of the arched surface and the edge of the outer surface of the bottom wall of the first shell 421 (labeled as n in the figure) is less than or equal to 3mm. In addition, those skilled in the art can understand that the above effect can also be achieved by providing structures such as ribs and bumps on the upper surface of the first shell 421.

[0062] like Fig.14 As shown, in the technical solution of this embodiment, the abutting and matching structure includes a top-butting convex rib 71, which is arranged on the lower surface of the upper cover 21 and is located above the pressure-limiting valve 40. Specifically, a receiving recess is arranged on the lower surface of the upper cover 21 at a position corresponding to the pressure-limiting valve 40. When the inner pot cover 22 is installed on the upper cover 21, the pressure-limiting valve 40 is accommodated in the receiving recess, and the above-mentioned top-butting convex rib 71 is arranged on the top wall of the receiving recess. At the same time, the top-butting convex rib 71 is an annular convex rib. The principle and function of the top-butting convex rib 71 in this embodiment are consistent with those of the above-mentioned arched surface, and will not be repeated here.

[0063] like Figure 2 , Figure 3 and Figure 4 As shown, in the technical solution of this embodiment, a valve seat 221 is provided on the inner pot cover 22, and the exhaust passage 30 is provided in the valve seat 221, wherein a positioning structure is provided on the valve seat 221 and / or the upper cover 21, and when the counterweight 42 is lifted, the positioning structure prevents the counterweight 42 from interfering with the pressure limiting valve body 41. Specifically, the valve seat 221 is surrounded by an annular vertical wall. The exhaust passage 30 is provided at the center of the valve seat 221. From Figure 4 It can be seen that in this example, the inner diameter of the counterweight 42 is larger than the outer diameter of the pressure-limiting valve body 41, and the inner diameter of the valve seat 221 is larger than the outer diameter of the counterweight 42. Therefore, in the process of the counterweight 42 being lifted, the counterweight 42 may deflect and collide with the pressure-limiting valve body 41, thereby causing the pressure-limiting valve body 41 to be crooked, and the pressure-limiting valve body 41 cannot block the exhaust passage, thereby losing the function of limiting pressure. In this embodiment, by providing a positioning structure, the counterweight 42 will not interfere with or collide with the pressure-limiting valve body 41 during the process of the counterweight 42 rising, thereby preventing the pressure-limiting valve body 41 from being crooked.

[0064] like Figure 4As shown, in the technical solution of this embodiment, the positioning structure includes a first positioning gap L1 and a second positioning gap L2, wherein the first positioning gap L1 is formed between the inner wall of the counterweight block 42 and the outer wall of the pressure-limiting valve body 41, and the second positioning gap L2 is formed between the outer wall of the counterweight block 42 and the inner wall of the valve seat 221, and the first positioning gap L1 is greater than the second positioning gap L2. Specifically, the above structure makes it possible for the counterweight block 42 to collide with the side wall of the valve seat 221 only during the rising process of the counterweight block 42, even if the counterweight block 42 is deflected, and the counterweight block 42 will not collide with the pressure-limiting valve body 41. Of course, in order to achieve the above effect, those skilled in the art may also set the positioning structure to a commonly used positioning structure such as a positioning rib and a positioning block.

[0065] Further, from Figure 4 It can be seen that the gap between the inner wall of the pressure limiting valve body 41 and the counterweight block 42 is not uniform in the up and down direction. Therefore, the first positioning gap L1 is not a constant value in the up and down direction. In this embodiment, at any position in the up and down direction, the first positioning gap L1 is greater than the second positioning gap L2. At the same time, in order to ensure a close fit between the structures, preferably, the first positioning gap L1 is less than or equal to 4 mm, and the second positioning gap L2 is less than or equal to 2 mm. At the same time, combined with Figure 5 and Figure 7 It can be seen that when the counterweight 42 is installed on the pressure-limiting valve body 41, the distance between the end of the second threaded segment 62 and the inner wall of the second housing 422 is the minimum value of the first positioning gap L1. That is, in this embodiment, the distance between the outer wall of the counterweight 42 and the inner wall of the valve seat 221 is smaller than the distance between the end of the second threaded segment 62 and the inner wall of the second housing 422, thereby ensuring that the first positioning gap L1 can always be greater than the second positioning gap L2.

[0066] like Figure 2As shown, in the technical solution of this embodiment, a first convex rib 411 extending outward is provided on the outer side wall of the pressure limiting valve body 41, and a second convex rib 222 is provided in the valve seat 221, and the first convex rib 411 and the second convex rib 222 are arranged in abutment, wherein a lifting inclined surface 412 is provided on the surface of the first convex rib 411 facing the second convex rib 222, so that when the pressure limiting valve body 41 is driven to rotate, the pressure limiting valve body 41 can move upward. Specifically, in a conventional pressure limiting valve structure, a notch is usually provided on the lower side of the side wall of the pressure limiting valve to cooperate with the convex rib in the valve seat. In this embodiment, since a counterweight 42 is provided on the outer shell of the pressure limiting valve body 41, the diameter of the pressure limiting valve body 41 is relatively small, and a corresponding notch cannot be provided on the side wall of the pressure limiting valve body 41. In this embodiment, the first convex rib 411 is provided on the side wall of the pressure limiting valve body 41, and the first convex rib 411 extends in a direction away from the pressure limiting valve body 41. A lifting slope 412 is provided on the lower surface of the first rib 411, so that when the pressure limiting valve body 41 is driven to rotate, the pressure limiting valve body 41 moves upward under the action of the lifting slope 412, so that the plug in the pressure limiting valve body 41 is separated from the upper end of the exhaust channel 30, thereby achieving exhaust.

[0067] like Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, when the counterweight 42 cooperates with the pressure-limiting valve body 41, the counterweight 42 is supported by the first convex rib 411. Specifically, after the counterweight 42 is installed and sleeved outside the pressure-limiting valve body 41, the counterweight 42 falls by gravity and is supported by the upper surface of the first convex rib 411.

[0068] like Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, a first positioning notch 423 is provided at the lower end of the side wall of the counterweight block 42, and the first convex rib 411 is embedded in the first positioning notch 423. Specifically, when the counterweight block 42 is installed and sleeved outside the pressure-limiting valve body 41, the first convex rib 411 is embedded in the first positioning notch 423, thereby playing a role in stopping the rotation between the counterweight block 42 and the pressure-limiting valve body 41.

[0069] like Figure 8As shown, in the technical solution of this embodiment, the first convex rib 411 includes a first plate segment 4111 and a second plate segment 4112 that are connected to each other and at an angle to each other, and the lower surface of the first plate segment 4111 and the lower surface of the second plate segment 4112 form a lifting slope 412. Specifically, an "inverted V"-shaped structure is formed between the first plate segment 4111 and the second plate segment 4112. Preferably, the first plate segment 4111 and the second plate segment 4112 are arranged at an obtuse angle. That is, the lifting slope 412 is an "inverted V"-shaped surface. Correspondingly, the upper surface of the first convex rib 411 is also an "inverted V"-shaped surface, and the shape of the first positioning notch 423 is an "inverted V" shape. The advantage of the above structure is that when the counterweight 42 is lifted, even if the counterweight 42 is slightly twisted relative to the pressure-limiting valve body 41, when the counterweight 42 falls, the upper surface of the first plate segment 4111 and the upper surface of the second plate segment 4112 can also return the counterweight 42 to its original position.

[0070] like Figure 8 As shown, in the technical solution of this embodiment, a push handle 413 is provided on the pressure-limiting valve body 41, and a push-up mechanism is provided in the pot cover 20, the push-up mechanism pushes the push handle 413 and causes the pressure-limiting valve body 41 to rotate along its axis, wherein a second avoidance gap 424 is provided at the lower end of the side wall of the counterweight block 42, and part of the push handle 413 is embedded in the second avoidance gap 424. Specifically, the above-mentioned push handle 413 is an "L"-shaped plate. The push-up mechanism is a solenoid valve, and when the push rod of the solenoid valve pushes the push handle 413, the pressure-limiting valve body 41 can rotate along its own axis. Preferably, when the counterweight block 42 is sleeved on the pressure-limiting valve body 41, the push handle 413 is embedded in the second avoidance gap 424. It should be noted that before the first thread segment 61 and the second thread segment 62 are screwed together and disengaged, there is no interference between the push handle 413 and the second avoidance gap 424, thereby ensuring that the counterweight block 42 and the pressure-limiting valve body 41 can be screwed together normally when installing the counterweight block 42.

[0071] like Figure 1 As shown, in the technical solution of this embodiment, the upper cover 21 includes an inner lining 211 and a surface cover 212 covering the inner lining 211 , and the inner pot cover 22 is detachably arranged under the inner lining 211 .

[0072] like Figures 15 to 20 As shown, in the technical solution of this embodiment, a moving mechanism 80 and a driving mechanism 90 are arranged in the pot cover 20. Among them, the second magnetic member 52 is arranged on the moving mechanism 80, and the moving mechanism 80 has a first position and a second position. When the moving mechanism 80 is in the first position, the first magnetic member 51 and the second magnetic member 52 are arranged correspondingly. When the moving mechanism 80 is in the second position, the first magnetic member 51 and the second magnetic member 52 are arranged in a staggered manner. The driving mechanism 90 cooperates with the moving mechanism 80 and drives the moving mechanism 80 to move between the first position and the second position. Specifically, from Figures 15 to 17 It can be seen that when the moving mechanism 80 is in the first position, the moving mechanism 80 drives the second magnetic member 52 to be located directly above the first magnetic member 51. At this time, the magnetic force exerted by the second magnetic member 52 on the first magnetic member 51 is greater than the gravity of the counterweight 42, thereby attracting and lifting the counterweight 42. Figures 18 to 20 It can be seen that when the moving mechanism 80 is in the second position, the moving mechanism 80 drives the second magnetic component 52 to separate from the first magnetic component 51. At this time, the magnetic force exerted by the second magnetic component 52 on the first magnetic component 51 is not enough to overcome the gravity of the counterweight 42. At this time, the counterweight 42 falls by gravity and is abutted against the pressure limiting valve body 41.

[0073] like Fig.15 and Fig.18 As shown, in the technical solution of this embodiment, the moving mechanism 80 includes a swing rod, the second magnetic member 52 is arranged at the first end of the swing rod, the driving mechanism 90 cooperates with the second end of the swing rod and drives the swing rod to swing, and the swing rod is arranged above the pressure limiting valve 40. Specifically, the swing rod is a linear rod-shaped structure. At the same time, the driving mechanism 90 drives the swing rod to swing in a plane.

[0074] like Fig.15 and Fig.18 As shown, in the technical solution of this embodiment, a first limiting column 101 and a second limiting column 102 are arranged in the pot cover 20, the first end of the swing rod is located between the first limiting column 101 and the second limiting column 102, and a limiting convex column 81 is arranged at the first end of the swing rod. When the swing rod is in the first position, the limiting convex column 81 abuts against the first limiting column 101, and when the swing rod is in the second position, the limiting convex column 81 abuts against the second limiting column 102. Specifically, the first limiting column 101 and the second limiting column 102 are used to limit the position of the swing rod so that the swing rod is in the first position or in the second position.

[0075] Preferably, the driving mechanism 90 is a stepping motor.

[0076] Preferably, the pressure cooking device in this embodiment is an electric pressure cooker.

[0077] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0078] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0079] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0080] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure cooking device, characterized in that: include: A pot body (10) is used to hold food to be cooked, and a heating device is arranged inside the pot body (10); A pot cover (20), the pot cover (20) being arranged on the pot body (10), and the pot cover (20) being provided with an exhaust passage (30); A pressure limiting valve (40) is matched with the exhaust passage (30), the pressure limiting valve (40) comprising a pressure limiting valve body (41) and a counterweight (42), the counterweight (42) comprising a first shell (421) and a second shell (422), the first shell (421) being sleeved outside the second shell (422), The first shell (421) is provided with an exhaust hole (4212), the second shell (422) is provided with an exhaust protrusion (4221) extending toward the first shell (421), the exhaust protrusion (4221) is provided with a vent hole, and after the first shell (421) is sleeved on the second shell (422), the exhaust protrusion (4221) is inserted into the exhaust hole (4212).

2. The pressure cooking device according to claim 1, characterized in that: The end of the exhaust protrusion (4221) is flush with the outer surface of the first shell (421), or the end of the exhaust protrusion (4221) protrudes from the outer surface of the first shell (421).

3. The pressure cooking device according to claim 2, characterized in that: The first shell (421) and the second shell (422) are both cap-shaped structures, the exhaust hole (4212) is arranged on the bottom wall of the first shell (421), and the exhaust protrusion (4221) is arranged on the bottom wall of the second shell (422).

4. The pressure cooking device according to any one of claims 1 to 3, characterized in that: There are a plurality of exhaust holes (4212) and a plurality of exhaust protrusions (4221), and the plurality of exhaust holes (4212) and the plurality of exhaust protrusions (4221) are arranged in a one-to-one correspondence.

5. The pressure cooking device according to claim 4, characterized in that: The plurality of exhaust holes (4212) are arranged at intervals along the circumference of the first shell (421).

6. The pressure cooking device according to claim 1, characterized in that: The first shell (421) is made of a metal material, the second shell (422) is made of a plastic material, and the second shell (422) is provided with a connection and matching structure that matches the pressure-limiting valve body (41).

7. The pressure cooking device according to claim 6, characterized in that The second shell (422) is formed by an integral injection molding process and is connected to the first shell (421).

8. The pressure cooking device according to claim 1, characterized in that The pressure cooking device comprises: A magnetic mechanism (50) is arranged on the pot cover (20), and the magnetic mechanism (50) attracts the counterweight block (42) to separate from the pressure-limiting valve body (41).

9. The pressure cooking device according to claim 8, characterized in that The counterweight (42) is provided with a first magnetic member (51), the magnetic mechanism (50) comprises a second magnetic member (52), and the second magnetic member (52) is provided in the pot cover (20). The pressure cooking device further comprises a moving mechanism (80) and a driving mechanism (90) arranged in the pot cover (20), wherein the second magnetic member (52) is arranged on the moving mechanism (80), and the moving mechanism (80) has a first position and a second position. When the moving mechanism (80) is in the first position, the first magnetic member (51) and the second magnetic member (52) are arranged correspondingly. When the moving mechanism (80) is in the second position, the first magnetic member (51) and the second magnetic member (52) are arranged in a staggered manner. The driving mechanism (90) cooperates with the moving mechanism (80) and drives the moving mechanism (80) to move between the first position and the second position.

10. The pressure cooking device according to claim 1, characterized in that The pressure cooking device is an electric pressure cooker.

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