Pressure cooker with negative vacuum

Abstract

The pressure cooker has a negative pressure vacuum state, and includes a pot body (1) having a storage space (11), a lid (2), and a control structure. The control structure includes a sealing elastic member (3), a pressure reducing valve (4), and a stop valve (5). The storage space (11) can be in a high pressure state, a small positive pressure state, or a negative vacuum state. When the storage space (11) is in a high pressure state, the pressure reducing valve (4) rises under high pressure thrust, discharging high pressure gas from the storage space (11), and the stop valve (5) rises under pressure, restricting the opening of the lid (2) and creating a sealed state. When the storage space (11) is in a small positive pressure state or a negative vacuum state, the pressure reducing valve (4), the stop valve (5), and the space between the pot body (1) and the lid (2) are all in a sealed state. To keep the storage space (11) sealed after heating of the pressure cooker is stopped, to ensure that the storage space (11) smoothly transitions in sequence from a high pressure state to a small positive pressure state and then to a negative vacuum state, to prevent food in the storage space (11) from being oxidized by the outside air or being corroded by microorganisms and becoming deteriorated, and to achieve a freshness-preserving function of the pressure cooker.

Description

[Technical field]

[0001] The present invention relates to the field of cooking pressure appliances, in particular pressure cookers with negative vacuum. [Background technology]

[0002] All pressure cookers currently on the market are sealed under high pressure (safety) conditions, and open to the outside under normal pressure (ambient atmospheric pressure). The sealing ring, pressure reducing valve, and stop valve of the pressure cooker are provided with a certain air gap with the pressure cooker body. Under high pressure, the sealing ring, pressure reducing valve, and stop valve close the air gap through elastic deformation, maintaining the pressure inside the pot. Under normal pressure, the air inside the pot can freely exchange with the air and microorganisms in the external environment through the air gap, causing the food in the pot to gradually oxidize and deteriorate.

[0003] In the process of practical use, pressure cookers on the market are not adapted to people's fast-paced lifestyles. For example, in the evening, people who work in an office use a pressure cooker to cook the next day's breakfast or lunch box to take to the office. After cooking, they must release the pressure in the pressure cooker and then put the food in separate dishes and put it in the refrigerator. Otherwise, in hot weather, the food will not be fresh if left in the pressure cooker, and bacteria will grow and spoil. Therefore, we need a pressure cooker with high adaptability now. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT The object of the present invention is to provide a pressure cooker with a negative vacuum state to solve the problem that pressure cookers cannot keep food fresh. [Means for solving the problem]

[0005] In order to solve the above technical problems, the object of the present invention is realized by the following technical solutions.

[0006] A pressure cooker having a negative pressure vacuum state includes a pot body having a storage space for placing food, a lid that engages with the opening of the pot body, and a control structure for automatically opening and closing the storage space. Here, the control structure includes a sealing elastic member provided between the pot body and the lid for sealing the gap between the pot body and the lid, a pressure reducing valve provided on the lid for controlling the magnitude of the air pressure in the storage space, and a stop valve provided on the lid for restricting the opening of the lid. Here, the storage space includes a high pressure state, a small positive pressure state, and a negative pressure vacuum state. When the storage space is in a high pressure state, the pressure reducing valve rises under high pressure thrust to discharge the high pressure gas in the storage space, and the stop valve rises under pressure to restrict the opening of the lid and become in a sealed state. When the storage space is in a small positive pressure state or a negative pressure vacuum state, the pressure reducing valve, the stop valve, and the space between the pot body and the lid are all in a sealed state.

[0007] The sealing resilient member further includes a first annular gasket disposed on an inner wall of the lid.

[0008] Furthermore, the pot body has an opening edge. The first annular gasket is a sealing ring, and includes an upper ring, a lower ring, and a lower lip ring. The outer end of the upper ring is fixedly connected to the outer end of the lower ring. The inner ends of the upper ring and the lower ring are inclined away from each other. One end of the lower lip ring is fixed to the lower ring. The lower lip ring is inclined outward. When the storage space is in a high-pressure state, the upper ring and the lower ring expand and deform outward under pressure, so that the upper ring tightly seals the lid, and the lower ring and the lower lip ring abut against the opening edge to tightly seal the pot body. When the storage space is in a small positive pressure state or a negative vacuum state, the upper ring and the lower ring are both reset to their initial free shapes, and the lower lip ring compensates for the fitting gap between the lid and the opening edge to keep the storage space in a negative vacuum state.

[0009] Furthermore, the upper ring is provided with a lower lip ring that is provided symmetrically with respect to the lower lip ring.

[0010] Furthermore, a distortion space is formed between the upper ring and the lower ring, and a reinforcing material is provided in the distortion space to hold the upper ring and the lower ring against deformation in a negative vacuum state.

[0011] Additionally, the stiffener includes a plurality of stiffening ribs uniformly disposed within the strain space.

[0012] Furthermore, the pot body has an opening edge. The first annular gasket includes an upper connection part and a lower connection part. The outer end of the upper connection part is fixedly connected to the outer end of the lower connection part. The inner end of the upper connection part and the inner end of the lower connection part are inclined in a direction away from each other. When the storage space is in a high-pressure state, the upper connection part and the lower connection part expand and deform outward under pressure, so that the upper connection part tightly seals the lid, and the lower connection part abuts against the opening edge to tightly seal the pot body. When the storage space is in a small positive pressure state or a negative vacuum state, both the upper connection part and the lower connection part are reset to their initial free shapes.

[0013] Furthermore, the sealing elastic member further includes a second annular gasket provided on the opening edge for abutting against a bottom side of the lower connection portion.

[0014] The second annular gasket further includes a set portion that is set on the opening edge and a contact portion that is fixedly connected to the set portion. When the accommodation space is in a high pressure state, a small positive pressure state, or a negative vacuum state, the contact portions all contact the bottom side of the lower connection portion.

[0015] Furthermore, the inner end of the abutting portion is fixedly connected to the inner end of the set portion, and the abutting portion is provided so as to be inclined outward.

[0016] Furthermore, the pressure reducing valve includes a pressure reducing valve body that is vertically movably connected to the lid, and an elastic body that is provided on the lid. The elastic body is provided with an exhaust hole that communicates with the accommodation space. When the accommodation space is in a high-pressure state, the pressure reducing valve body rises due to high-pressure thrust, and the exhaust hole opens. When the accommodation space changes from a high-pressure state to a small positive pressure state and enters a negative pressure vacuum state, the pressure reducing valve body moves downward due to gravity, and closes the exhaust hole.

[0017] The cover is further provided with an exhaust pipe. The elastic body is provided inside the exhaust pipe. The pressure reducing valve body includes a pressurizing portion and an inserting portion that are set on an outer wall of the exhaust pipe. The inserting portion is provided on a bottom wall within the pressurizing portion, and the inserting portion reciprocates into the exhaust hole.

[0018] Furthermore, the fitting portion is provided in a tapered shape such that the outer diameter gradually decreases from the top.

[0019] Further, the stop valve includes a stop valve body, a first sealing ring, and a second sealing ring. The lid is provided with a lid through-hole through which the stop valve body slides up and down. The first sealing ring is provided at one end of the stop valve body located in the storage space, and the second sealing ring is provided at the other end of the stop valve body. When the storage space is in a pressurized state, the stop valve body moves upward to restrict the opening of the lid, and the first sealing ring is moved to seal the lid through-hole. When the storage space changes from a high pressure state to a small positive pressure state and enters a negative pressure vacuum state, the stop valve body moves downward by gravity and returns to its initial position, and the second sealing ring seals the lid through-hole due to the gravity of the stop valve. Effect of the Invention

[0020] An embodiment of the present invention provides a pressure cooker having a negative pressure vacuum state, which includes a pot body having a storage space, a lid, and a control structure. The control structure includes a sealed elastic member, a pressure reducing valve, and an open / close valve. Here, the storage space includes a high pressure state, a small positive pressure state, and a negative pressure vacuum state. When the storage space is in a high pressure state, the pressure reducing valve rises under high pressure thrust to discharge the high pressure gas in the storage space, and the open / close valve rises under pressure to restrict the opening of the lid and to be in a sealed state. When the storage space is in a small positive pressure state or a negative pressure vacuum state, the pressure reducing valve, the open / close valve, and the space between the pot body and the lid are all in a sealed state.

[0021] According to an embodiment of the present invention, even if cooked food is left in a pressure cooker for a long time, it will not be oxidized by the outside air or deteriorated by microbial attack, and further, the purpose of providing vacuum freshness preservation for cooked food is achieved.

[0022] Secondly, the pressure cooker keeps the storage space sealed after heating is stopped, so users do not need to take out the food immediately, but can simply heat the food in the pressure cooker when they wake up in the morning or get home at night, which is simple and convenient, and makes the applicability of the pressure cooker perfectly fit the needs of today's fast-paced life.

[0023] Thirdly, since the pressure cooker of the present invention has a vacuum freshness preservation function, there is no need to use an additional refrigerator to keep food fresh, which reduces energy consumption. [Brief description of the drawings]

[0024] In order to more clearly describe the technical solutions of the embodiments of the present invention, the following briefly describes the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without paying creative labor.

[0025] [Figure 1] FIG. 2 is an explosion diagram of a pressure cooker with negative vacuum according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of a pressure cooker with negative vacuum according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view of a sealing elastic member according to the first embodiment of the present invention. [Figure 4] FIG. 3 is a cross-sectional view of a second annular gasket according to the first embodiment of the present invention. [Diagram 5] FIG. 3 is an enlarged view of a portion A in FIG. 2 showing the pressure reducing valve according to the first embodiment of the present invention. [Figure 6] FIG. 11 is an explosion diagram of a pressure cooker with a negative vacuum state according to embodiment 2 of the present invention. [Figure 7] FIG. 6 is a partial schematic view of a first annular gasket according to a second embodiment of the present invention. [Figure 8] FIG. 4 is a structural schematic diagram of a first annular gasket according to embodiment 2 of the present invention. [Figure 9] FIG. 11 is a cross-sectional view of a pressure reducing valve according to a third embodiment of the present invention. [Figure 10] FIG. 11 is a schematic diagram showing the structure of an elastic body and an exhaust pipe according to a fourth embodiment of the present invention. [Figure 11] FIG. 11 is a structural schematic diagram of a second sealing ring according to embodiment 5 of the present invention. [Figure 12] FIG. 11 is a structural schematic diagram of a first annular gasket according to embodiment 6 of the present invention. [Figure 13] FIG. 11 is a structural schematic diagram of a first annular gasket according to embodiment 7 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present invention.

[0027] As used in this specification and the appended claims, the terms "comprise" and "containing" are to be understood as indicating the presence of stated features, wholes, steps, operations, elements and / or components, but not excluding the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or sets thereof.

[0028] It should also be understood that the terminology used in the present specification is for the purpose of describing particular embodiments only, and is not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a," "one," and "the" are intended to include the plural forms unless the context clearly dictates otherwise.

[0029] Furthermore, the term "and / or" as used in the present specification and the appended claims should be understood to mean and include any and all possible combinations of one or more of the associated listed items.

[0030] An embodiment of the present invention provides a pressure cooker with a negative vacuum.

[0031] (Embodiment 1) 1 to 5, the pressure cooker includes a lid 2, a control structure, and a pot body 1 having a storage space 11 and an opening edge 12. The control structure can automatically open or close the storage space 11 when the gas pressure in the storage space 11 increases or decreases. In the prior art, after cooking in the pressure cooker, the temperature in the storage space 11 decreases until the storage space 11 is at normal pressure, i.e., the gas in the storage space 11 communicates with the outside gas through the gap between the opening edge 12 and the lid 2, causing the food in the lid 2 to gradually oxidize and deteriorate. In order to solve this problem, the control structure in the embodiment of the present application includes a sealing elastic member 3, a pressure reducing valve 4, and a stop valve 5. The sealing elastic member 3 is disposed between the pot body 1 and the lid 2 to seal the gap between the opening edge 12 and the lid 2. The pressure reducing valve 4 and the stop valve 5 are both disposed on the lid 2. The pressure reducing valve 4 is used to control the magnitude of the air pressure in the storage space 11, and the stop valve 5 is used to limit the opening of the lid 2.

[0032] 1 and 2, the storage space 11 includes a high pressure state, a small positive pressure state, and a negative vacuum state. When the storage space 11 is in a high pressure state, the pressure reducing valve 4 rises under high pressure thrust to discharge the high pressure gas in the storage space 11, and the stop valve 5 rises under pressure to restrict the opening of the lid 2 and to be in a sealed state. When the storage space 11 is in a small positive pressure state or a negative vacuum state, the pressure reducing valve 4, the stop valve 5, and the space between the pot body 1 and the lid 2 are all in a sealed state.

[0033] 3 and 4, in one embodiment, the sealing elastic member 3 includes a first annular gasket 31 provided on the inner wall of the lid 2. Specifically, the first annular gasket 31 abuts against the inner wall of the lid 2 by its own elastic force. The first annular gasket 31 includes an upper connection part 32 and a lower connection part 33. The outer end of the upper connection part 32 is fixedly connected to the outer end of the lower connection part 33, and the inner end of the upper connection part 32 and the inner end of the lower connection part 33 are inclined so as to be spaced apart from each other. When the storage space 11 is in a high pressure state, the upper connection part 32 and the lower connection part 33 expand and deform outwardly under pressure, so that the upper connection part 32 seals the lid 2 strongly, and the lower connection part 33 abuts against the upper side of the opening edge 12, so as to seal the pot body 1 strongly. When the storage space 11 is in a small positive pressure state or a negative vacuum state, the upper connection part 32 and the lower connection part 33 are both reset to their initial free shapes.

[0034] In order to prevent a gap remaining between the pot body 1 and the lid 2 after the pot body 1 and the lid 2 are engaged with each other, and to prevent gas in the storage space 11 from circulating with the outside, in the embodiment of the present application, the sealing elastic member 3 further includes a second annular gasket 34 that is provided on the opening edge 12 and abuts against the bottom side of the lower connection part 33. Specifically, the second annular gasket 34 includes a setting part 35 that is set on the opening edge 12 and an abutting part 36 that is fixedly connected to the setting part 35. When the storage space 11 is in any of a high pressure state, a small positive pressure state, and a negative pressure vacuum state, the abutting part 36 abuts against the bottom side of the lower connection part 33. In other words, the second annular gasket 34 can always seal the gap between the lid 2 and the opening edge 12.

[0035] Furthermore, the inner end of the abutting portion 36 is fixedly connected to the inner end of the set portion 35, and the abutting portion 36 is inclined outward. With this design, when the first annular gasket 31 is pressed down following the lid 2, the abutting portion 36 is subjected to pressure and completely abuts against the lower connecting portion 33, increasing the contact area between the two, that is, improving the airtightness between the lid 2 and the opening edge 12. In the actual process, when the accommodation space 11 is in a small positive pressure state or a negative vacuum state, both the upper connecting portion 32 and the lower connecting portion 33 are reset to their initial free shapes. At this time, the abutting portion 36 abuts against the lower connecting portion 33 even if its own elastic force is restored, and further ensures the airtightness between the lid 2 and the opening edge 12.

[0036] In one embodiment, the first annular gasket 31 and the second annular gasket 34 are both made from food grade silica gel.

[0037] During manufacturing, the set part 35 can be fixed to the opening edge part 12 according to actual needs, but in the embodiment of the present application, the set part 35 is directly set to the opening edge part 12 so that the second annular gasket 34 is removable. That is, when the user does not need the freshness-preserving function of the pressure cooker, the second annular gasket 34 can be directly removed. Meanwhile, as the second annular gasket 34 is used for a long period of time, its sealing effect deteriorates, so the second annular gasket 34 in the embodiment of the present application is convenient for the user to replace it by himself later.

[0038] 2 and 5, in this embodiment, the pressure reducing valve 4 includes a pressure reducing valve body 41 movably connected to the lid 2 in the vertical direction, and an elastic body 42 provided on the lid 2. The elastic body 42 is provided with an exhaust hole 43 communicating with the accommodation space 11. The exhaust hole 43 penetrates the elastic body 42 in the longitudinal direction. When the accommodation space 11 is in a high-pressure state, the pressure reducing valve body 41 rises under high-pressure thrust, and the exhaust hole 43 opens. When the accommodation space 11 changes from a high-pressure state to a small positive pressure state and enters a negative pressure vacuum state, the pressure reducing valve body 41 moves downward due to gravity, and seals the exhaust hole 43. In one embodiment, the elastic body 42 is made of food-grade silica gel.

[0039] In a specific embodiment, the cover 2 is provided with an exhaust pipe 21. The elastic body 42 is provided inside the exhaust pipe 21. Specifically, the exhaust pipe 21 extends in a vertical direction. The elastic body 42 is fixedly connected to the top inner wall of the exhaust pipe 21 by adhesion or bonding. The pressure reducing valve body 41 includes a pressurizing part 44 and an inserting part 45 set on the outer wall of the exhaust pipe 21. The inserting part 45 is provided on the bottom wall of the pressurizing part 44, and the inserting part 45 reciprocates and inserts into the exhaust hole 43. Furthermore, the inserting part 45 is provided in a tapered shape whose outer diameter gradually shrinks from the top. That is, after the inserting part 45 is inserted into the exhaust hole 43, the inserting part 45 presses the elastic body 42, so that the elastic body 42 and the inserting part 45 have a relatively airtight property, and the gas in the storage space 11 is prevented from leaking from the storage space 11. On the other hand, since the fitting portion 45 is tapered, the contact area between the high-pressure gas and the fitting portion 45 can be increased, and further, when the pressure in the accommodation space 11 exceeds the safety range, the high-temperature gas pushes up the pressure reducing valve body 41 in a timely manner, and the high-temperature gas can be released into the atmosphere.

[0040] In one embodiment, the stop valve 5 includes a stop valve body 51, a first sealing ring 52, and a second sealing ring 53. The lid 2 is provided with a lid through hole 54 through which the stop valve body 51 slides up and down. The first sealing ring 52 is provided at one end of the stop valve body 51 located in the accommodation space 11, and the second sealing ring 53 is provided at the other end of the stop valve body 51. Specifically, there is a gap between the stop valve body 51 and the lid through hole 54. To facilitate installation, the first sealing ring 52 is directly set at the bottom of the stop valve body 51, and the second sealing ring 53 is fitted into the central peripheral side wall of the stop valve body 51. When the accommodation space 11 is in a pressurized state, the stop valve body 51 moves upward to restrict the opening of the lid 2, and the first sealing ring 52 is moved to seal the lid through hole 54. When the storage space 11 changes from a high pressure state to a slight positive pressure state and enters a negative pressure vacuum state, the stop valve body 51 moves downward due to gravity and returns to its initial position, and the gravity of the stop valve 5 causes the second sealing ring 53 to seal the lid through hole 54.

[0041] In the use of the pressure cooker, food is heated in the pressure cooker, and the gas temperature in the storage space 11 rises and enters a high-pressure state, and the food is further cooked. When the food is cooked, the heating of the pressure cooker is stopped, and the gas in the storage space 11 gradually decreases over time. Since the sealing elastic member 3, the pressure reducing valve 4, and the stop valve 5 in the embodiment of the present application are used in combination, the storage space 11 continues to maintain a sealed state so that the storage space 11 can smoothly enter a small positive pressure state and a negative vacuum state in that order from a high-pressure state. Specifically, the upper connection part 32 and the lower connection part 33 are both reset to their initial free shapes, and the abutment part 36 abuts against the lower side of the lower connection part 33 even if its own elastic force is restored, sealing the gap between the lid 2 and the opening edge 12. The fitting part 45 moves downward due to the pressure part 44 and its own gravity, and further fits into the exhaust hole 43 to seal the elastic body 42. The stop valve body 51 moves downward due to gravity and returns to its initial position, moving the second sealing ring 53 downward to seal the gap between the stop valve body 51 and the lid through-hole 54.

[0042] In this way, even if cooked food is left in the pressure cooker for a long time, it does not become stale or break down, and the freshness can be well maintained. Secondly, the user does not need to take out the food immediately after the pressure cooker stops heating, but can eat the food by directly heating it in the pressure cooker when he wakes up in the morning or gets home at night, which is simple and convenient, and makes the applicability of the pressure cooker perfectly fit the needs of today's fast-paced life. Thirdly, since the pressure cooker of the present application has a vacuum freshness-maintaining function, there is no need to use an additional refrigerator to maintain the freshness of the food, which reduces energy consumption.

[0043] (Embodiment 2) 6 and 7, the present embodiment is different from the first embodiment in the following points. The sealing elastic member 3 does not have the second annular gasket 34. At the same time, the first annular gasket 31 is a sealing ring including an upper ring 3a, a lower ring 3b and a lower lip ring 3c. The outer end of the upper ring 3a is fixedly connected to the outer end of the lower ring 3b, and the inner ends of the upper ring 3a and the lower ring 3b are inclined away from each other. One end of the lower lip ring 3c is fixed to the lower ring 3b, and the lower lip ring 3c is inclined outward. When the storage space 11 is in a high-pressure state, the upper ring 3a and the lower ring 3b are expanded and deformed outward under pressure, so that the upper ring 3a seals the sealing lid 2 strongly, and the lower ring 3b and the lower lip ring 3c abut against the opening edge 12 to seal the pot body 1 strongly. When the accommodation space 11 is in a small positive pressure state or a negative vacuum state, the upper ring 3a and the lower ring 3b are both reset to their initial free shapes, and the lower lip ring 3c compensates for the fitting gap between the lid 2 and the opening edge 12 in order to keep the storage space 11 in a negative vacuum state.

[0044] Specifically, the lower lip ring 3c is integrally formed with the side of the lower ring 3b that faces away from the upper ring 3a, and a smooth arcuate surface 3f is formed at the connection between the lower lip ring 3c and the lower ring 3b. When the accommodation space 11 is in a high-pressure state, the upper ring 3a and the lower ring 3b are subjected to pressure and expand and deform outward, and the arcuate surface 3f is pressed into contact with the opening edge 12, thereby achieving the purpose of sealing the pot body 1 more strongly. On the other hand, when the accommodation space 11 is in a state of slight positive pressure or negative vacuum pressure, the upper ring 3a and the lower ring 3b are both reset to their initial free shapes, and the lower lip ring 3c The side of the ring 3a away from the upper ring 3a still contacts the opening edge 12, compensating for the fitting gap between the lid 2 and the opening edge 12, and achieving the purpose of maintaining a negative pressure vacuum state in the storage space 11. During manufacturing, the upper ring 3a, the lower ring 3b and the lower lip ring 3c are integrally molded according to actual needs.

[0045] During manufacturing, the upper ring 3a is provided with an upper lip ring (not shown) symmetrically arranged with the lower lip ring 3c according to actual needs. Such a design improves the airtightness between the first annular gasket 31 and the lid 2.

[0046] More preferably, a distortion space 3d is formed between the upper ring 3a and the lower ring 3b, and a reinforcing member 3e is provided in the distortion space 3d to hold the upper ring 3a and the lower ring 3b from deformation under negative pressure vacuum. Specifically, the reinforcing member 3e includes a plurality of reinforcing ribs uniformly arranged in the distortion space 3d. This design enhances the structural strength of the first annular gasket 31 and prevents deformation of the deformation space 3d under negative pressure vacuum.

[0047] In the embodiment of the present application, the number of reinforcing ribs is 32. In manufacturing, the number of reinforcing ribs may be different according to actual needs, and no further description will be given as long as it is possible to avoid deformation of the deformation space 3d of the first annular gasket 31 in a negative pressure vacuum state.

[0048] (Embodiment 3) 9, the present embodiment differs from the previous embodiment in the following respects. In the pressure reducing valve 4, the elastic body 42 is replaced with a third sealing ring 6, and the third sealing ring 6 is provided on the outside of the top of the exhaust pipe 21. Specifically, the pressurizing part 44 is provided with a plurality of pressure reducing holes 61 penetrating its outer wall and inner wall, the top of the peripheral side wall of the exhaust pipe 21 has a retreat surface 62 provided at an angle toward its geometric center line, and the third sealing ring 6 is fitted into the retreat surface 62.

[0049] In use, when the air pressure in the accommodation space 11 is higher than the safe air pressure state, the high-temperature gas pushes open the fitting part 45 so that the high-temperature gas in the accommodation space 11 is discharged through the exhaust hole 43 and the pressure reduction hole 61 in sequence, thereby ensuring that the accommodation space 11 maintains a safe pressure during cooking. When the gas temperature in the accommodation space 11 decreases, the fitting part 45 moves downward due to the pressurizing part 44 and its own gravity, and the inner bottom wall of the pressurizing part 44 abuts against the third sealing ring 6, ensuring the airtightness between the exhaust pipe 21 and the pressure reduction valve 4.

[0050] (Embodiment 4) 10, the present embodiment differs from the first embodiment in the following respects. The elastic body 42 is not fixedly connected to the exhaust pipe 21 by adhesion or bonding. The exhaust pipe 21 is provided with a plurality of horizontally extending stopper holes 7, and a plurality of stopper columns 71 are integrally formed with the peripheral side wall of the elastic body 42, and each stopper column 71 can be fitted into the corresponding stopper hole 7. This realizes a fixed connection between the elastic body 42 and the exhaust pipe 21, and ensures airtightness between the elastic body 42 and the exhaust pipe 21.

[0051] (Embodiment 5) With reference to FIG. 11, this embodiment differs from the first embodiment in that the fitting connection between the second sealing ring 53 and the stop valve body 51 is strengthened.

[0052] (Embodiment 6) With reference to FIG. 12, the present embodiment differs from the first embodiment in the following respects. The sealing elastic member 3 does not include the second annular gasket 34, but the upper reinforcing part 8 is provided on the outer wall of the upper connecting part 32, and the lower reinforcing part 81 is provided on the outer wall of the lower connecting part 33. The upper reinforcing part 8 and the lower reinforcing part 81 are provided with an outward inclination. When the storage space 11 smoothly goes from a high pressure state to a small positive pressure state and then to a negative pressure vacuum state, the upper reinforcing part 8 and the lower reinforcing part 81 can seal the gap between the lid 2 and the opening edge 12. On the other hand, in the case of a high pressure state, the upper connecting part 32 and the lower connecting part 33 can seal the gap between the lid 2 and the opening edge 12.

[0053] (Embodiment 7) 13, the difference between this embodiment and the sixth embodiment is that two elastic annular grooves 9 are provided in both the upper connection part 32 and the lower connection part 33. The two elastic annular grooves 9 located in the upper connection part 32 are located on both sides of the upper reinforcing part 8, respectively, and similarly, the two elastic annular grooves 9 in the lower connection part 33 have the same configuration. This design can enhance the distortion capacity of the upper reinforcing part 8 and the lower reinforcing part 81, and further facilitate the operation of the operator and save labor.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto, and those skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be in accordance with the scope of protection of the claims.

[0055] (Additional Note) (Appendix 1) A pot body (1) having a storage space (11) for placing food; A lid (2) that engages with the opening of the pot body (1); and a control structure for automatically opening and closing the storage space (11), wherein the control structure is a sealing elastic member (3) provided between the pot body (1) and the lid (2) for sealing a gap between the pot body (1) and the lid (2); a pressure reducing valve (4) provided on the lid (2) for controlling the level of air pressure in the storage space (11); a stop valve (5) provided on the lid (2) for limiting the opening of the lid (2); Here, the storage space (11) includes a high pressure state, a small positive pressure state, and a negative vacuum state, When the storage space (11) is in a high-pressure state, the pressure reducing valve (4) rises under high-pressure thrust to discharge the high-pressure gas in the storage space (11), and the stop valve (5) rises under pressure to restrict the opening of the lid (2) and to be in a sealed state. When the storage space (11) is in a small positive pressure state or a negative vacuum state, the pressure reducing valve (4), the stop valve (5), and the space between the pot body (1) and the lid (2) are all in a sealed state. A pressure cooker having a negative vacuum state characterized by the above.

[0056] (Appendix 2) The sealing elastic member (3) includes a first annular gasket (31) provided on the inner wall of the lid (2). A pressure cooker having a negative vacuum state as described in Appendix 1.

[0057] (Appendix 3) The pot body (1) has an opening edge (12), the first annular gasket (31) is a sealing ring and includes an upper ring (3a), a lower ring (3b) and a lower lip ring (3c), an outer end of the upper ring (3a) is fixedly connected to an outer end of the lower ring (3b), an inner end of the upper ring (3a) and an inner end of the lower ring (3b) are inclined in directions away from each other, one end of the lower lip ring (3c) is fixed to the lower ring (3b), and the lower lip ring (3c) is inclined outward, and when the storage space (11) is in a high pressure state, When the upper ring (3a) and the lower ring (3b) are subjected to pressure, they expand and deform outward, so that the upper ring (3a) tightly seals the lid (2), and the lower ring (3b) and the lower lip ring (3c) come into contact with the opening edge (12) to tightly seal the pot body (1). When the storage space (11) is in a state of slight positive pressure or negative vacuum, the upper ring (3a) and the lower ring (3b) are both reset to their initial free shapes, and the lower lip ring (34) compensates for the fitting gap between the lid (2) and the opening edge (12) to maintain the storage space (11) in a state of negative vacuum. 3. A pressure cooker having a negative vacuum state as described in appendix 2.

[0058] (Appendix 4) The upper ring (3a) is provided with an upper lip ring that is symmetrical to the lower lip ring (3c). 4. A pressure cooker having a negative vacuum state as described in appendix 3.

[0059] (Appendix 5) A distortion space (3d) is formed between the upper ring (3a) and the lower ring (3b), and a reinforcing member (3e) is provided in the distortion space (3d) to hold the upper ring (3a) and the lower ring (3b) against deformation under a negative pressure vacuum state. 4. A pressure cooker having a negative vacuum state as described in appendix 3.

[0060] (Appendix 6) The reinforcing member (3e) includes a plurality of reinforcing ribs uniformly arranged within the strain space (3d). A pressure cooker having a negative vacuum state as described in Appendix 5.

[0061] (Appendix 7) The pot body (1) has an opening edge (12), and the first annular gasket (31) includes an upper connection part (32) and a lower connection part (33), an outer end of the upper connection part (32) is fixedly connected to an outer end of the lower connection part (33), and an inner end of the upper connection part (32) and an inner end of the lower connection part (33) are inclined away from each other, when the storage space (11) is in a high pressure state, the upper connection part (32) and the lower connection part (33) are subjected to pressure and expand and deform outward, thereby the upper connection part (32) tightly seals the lid (2), and the lower connection part (33) abuts against the opening edge (12) to tightly seal the pot body (1), and when the storage space (11) is in a small positive pressure state or a negative vacuum state, both the upper connection part (32) and the lower connection part (33) are reset to their initial free shapes. 3. A pressure cooker having a negative vacuum state as described in appendix 2.

[0062] (Appendix 8) The sealing elastic member (3) further includes a second annular gasket (34) provided on the opening edge (12) and adapted to abut against a bottom side of the lower connection portion (33). 8. A pressure cooker having a negative vacuum state as described in appendix 7.

[0063] (Appendix 9) the second annular gasket (34) includes a set portion (35) that is set on the opening edge (12) and an abutment portion (36) that is fixedly connected to the set portion (35), and when the accommodation space (11) is in any one of a high pressure state, a small positive pressure state, and a negative pressure vacuum state, both of the abutment portions (36) abut against the bottom side of the lower connection portion (33). 9. A pressure cooker having a negative vacuum state as described in appendix 8.

[0064] (Appendix 10) The inner end of the abutment portion (36) is fixedly connected to the inner end of the set portion (35), and the abutment portion (36) is provided so as to be inclined outward. 10. A pressure cooker having a negative vacuum state as described in appendix 9.

[0065] (Appendix 11) The pressure reducing valve (4) includes a pressure reducing valve body (41) movably connected to the lid (2) in the vertical direction, and an elastic body (42) provided on the lid (2). The elastic body (42) is provided with an exhaust hole (43) communicating with the storage space (11). When the storage space (11) is in a high-pressure state, the pressure reducing valve body (41) rises due to a high-pressure thrust, and the exhaust hole (43) opens. When the storage space (11) changes from a high-pressure state to a minute positive pressure state and enters a negative pressure vacuum state, the pressure reducing valve body (41) moves downward due to gravity, and closes the exhaust hole (43). A pressure cooker having a negative vacuum state as described in Appendix 1.

[0066] (Appendix 12) an exhaust pipe (21) is provided in the cover (2), the elastic body (42) is provided inside the exhaust pipe (21), the pressure reducing valve body (41) includes a pressurizing portion (44) and an insertion portion (45) that are set on an outer wall of the exhaust pipe (21), the insertion portion (45) is provided on a bottom wall within the pressurizing portion (44), and the insertion portion (45) is reciprocally inserted into the exhaust hole (43); 12. A pressure cooker having a negative vacuum state as described in appendix 11.

[0067] (Appendix 13) The fitting portion (45) is provided in a tapered shape in which the outer diameter gradually decreases from the top. 13. A pressure cooker having a negative vacuum state as described in appendix 12.

[0068] (Appendix 14) The stop valve (5) includes a stop valve body (51), a first sealing ring (52), and a second sealing ring (53). The lid (2) is provided with a lid through-hole (54) through which the stop valve body (51) slides up and down. The first sealing ring (52) is provided at one end of the stop valve body (51) located within the accommodation space (11). The second sealing ring (53) is provided at the other end of the stop valve body (51). The accommodation space (11) is When the pressure is increased, the stop valve body (51) moves upward to restrict the opening of the lid (2) and moves the first sealing ring (52) to seal the lid through hole (54). When the storage space (11) changes from a high pressure state to a small positive pressure state and enters a negative pressure vacuum state, the stop valve body (51) moves downward by gravity and returns to its initial position, and the gravity of the stop valve (5) causes the second sealing ring (53) to seal the lid through hole (54). 14. A pressure cooker having a negative vacuum state according to any one of claims 1 to 13. [Explanation of symbols]

[0069] 1: pot body, 11: storage space, 12: opening edge, 2: lid, 21: exhaust pipe, 3: sealing elastic member, 31: first annular gasket, 32: upper connection part, 33: lower connection part, 34: second annular gasket, 35: set part, 36: abutment part, 4: pressure reducing valve, 41: pressure reducing valve body, 42: elastic body, 43: exhaust hole, 44: pressurizing part, 45: fitting part, 5: stop valve, 51: open Stop valve body, 52: first sealing ring, 53: second sealing ring, 54: lid through hole, 6: third sealing ring, 61: pressure reduction hole, 62: retraction surface, 7: stopper hole, 71: stopper column, 8: upper reinforcement part, 81: lower reinforcement part, 9: elastic annular groove, 3a: upper ring, 3b: lower ring, 3c: lower lip ring, 3d: distortion space, 3e: reinforcement material, 3f: arc surface.

Claims

1. A pot body (1) having a storage space (11) for placing food; A lid (2) that engages with the opening of the pot body (1); and a control structure for automatically opening and closing the storage space (11), wherein the control structure is a sealing elastic member (3) provided between the pot body (1) and the lid (2) for sealing a gap between the pot body (1) and the lid (2); a pressure reducing valve (4) provided on the lid (2) for controlling the magnitude of air pressure in the storage space (11); a stop valve (5) provided on the lid (2) for limiting the opening of the lid (2); Here, the storage space (11) includes a high pressure state, a small positive pressure state, and a negative pressure vacuum state, When the storage space (11) is in a high pressure state, the pressure reducing valve (4) rises under high pressure thrust to discharge the high pressure gas in the storage space (11), and the stop valve (5) rises under pressure to restrict the opening of the lid (2) and to be in a sealed state. When the storage space (11) is in a small positive pressure state or a negative vacuum state, the pressure reducing valve (4), the stop valve (5), and the space between the pot body (1) and the lid (2) are all in a sealed state. The sealing elastic member (3) includes a first annular gasket (31) provided on an inner wall of the lid (2), The pot body (1) has an opening edge (12), the first annular gasket (31) is a sealing ring and includes an upper ring (3a), a lower ring (3b) and a lower lip ring (3c), an outer end of the upper ring (3a) is fixedly connected to an outer end of the lower ring (3b), an inner end of the upper ring (3a) and an inner end of the lower ring (3b) are inclined in directions away from each other, one end of the lower lip ring (3c) is fixed to the lower ring (3b), and the lower lip ring (3c) is inclined outward, and when the storage space (11) is in a high pressure state, the upper ring (3a) is fixed to the lower ring (3b) and the lower lip ring (3c) is inclined outward. When pressure is applied, the ring (3a) and the lower ring (3b) expand and deform outward, whereby the upper ring (3a) tightly seals the lid (2), and the lower ring (3b) and the lower lip ring (3c) abut against the opening edge (12) to tightly seal the pot body (1). When the storage space (11) is in a state of slight positive pressure or negative vacuum, the upper ring (3a) and the lower ring (3b) are both reset to their initial free shapes, and the lower lip ring (3c) compensates for the fitting gap between the lid (2) and the opening edge (12) to maintain the storage space (11) in a state of negative vacuum. A distortion space (3d) is formed between the upper ring (3a) and the lower ring (3b), and a reinforcing material (3e) is provided in the distortion space (3d) to hold the upper ring (3a) and the lower ring (3b) against deformation in a negative pressure vacuum state. A pressure cooker having a negative vacuum state characterized by the above.

2. The upper ring (3a) is provided with an upper lip ring that is symmetrically arranged with the lower lip ring (3c).

2. The pressure cooker having a negative vacuum state according to claim 1.

3. The reinforcing member (3e) includes a plurality of reinforcing ribs uniformly arranged within the strain space (3d).

2. The pressure cooker having a negative vacuum state according to claim 1.

4. A pressure cooker having a negative vacuum state, A pot body (1) having a storage space (11) for placing food; A lid (2) that engages with the opening of the pot body (1); and a control structure for automatically opening and closing the storage space (11), wherein the control structure is a sealing elastic member (3) provided between the pot body (1) and the lid (2) for sealing a gap between the pot body (1) and the lid (2); a pressure reducing valve (4) provided on the lid (2) for controlling the magnitude of air pressure in the storage space (11); a stop valve (5) provided on the lid (2) for limiting the opening of the lid (2); Here, the storage space (11) includes a high pressure state, a small positive pressure state, and a negative pressure vacuum state, When the storage space (11) is in a high pressure state, the pressure reducing valve (4) rises under high pressure thrust to discharge the high pressure gas in the storage space (11), and the stop valve (5) rises under pressure to restrict the opening of the lid (2) and to be in a sealed state. When the storage space (11) is in a small positive pressure state or a negative vacuum state, the pressure reducing valve (4), the stop valve (5), and the space between the pot body (1) and the lid (2) are all in a sealed state. The sealing elastic member (3) includes a first annular gasket (31) provided on an inner wall of the lid (2), The pot body (1) has an opening edge (12), and the first annular gasket (31) includes an upper connection part (32) and a lower connection part (33), an outer end of the upper connection part (32) is fixedly connected to an outer end of the lower connection part (33), and an inner end of the upper connection part (32) and an inner end of the lower connection part (33) are inclined in a direction away from each other, when the storage space (11) is in a high pressure state, the upper connection part (32) and the lower connection part (33) expand and deform outward under pressure, so that the upper connection part (32) tightly seals the lid (2), and the lower connection part (33) abuts against the opening edge (12) to tightly seal the pot body (1), and when the storage space (11) is in a small positive pressure state or a negative vacuum state, both the upper connection part (32) and the lower connection part (33) are reset to their initial free shapes, The sealing elastic member (3) further includes a second annular gasket (34) provided on the opening edge (12) and adapted to abut against a bottom side of the lower connection portion (33); the second annular gasket (34) includes a set portion (35) that is set on the opening edge (12) and an abutment portion (36) that is fixedly connected to the set portion (35), and when the storage space (11) is in any one of a high pressure state, a small positive pressure state, and a negative pressure vacuum state, the abutment portion (36) abuts against the bottom side of the lower connection portion (33); The inner end of the abutment portion (36) is fixedly connected to the inner end of the set portion (35), and the abutment portion (36) is provided so as to be inclined outward. A pressure cooker having a negative vacuum state characterized by the above.

5. The pressure reducing valve (4) includes a pressure reducing valve body (41) movably connected to the lid (2) in the vertical direction, and an elastic body (42) provided on the lid (2), and the elastic body (42) is provided with an exhaust hole (43) communicating with the storage space (11). When the storage space (11) is in a high-pressure state, the pressure reducing valve body (41) rises under high-pressure thrust and the exhaust hole (43) opens. When the storage space (11) changes from a high-pressure state to a small positive pressure state and enters a negative pressure vacuum state, the pressure reducing valve body (41) moves downward by gravity and seals the exhaust hole (43).

5. A pressure cooker having a negative vacuum state according to claim 1 or 4.

6. The cover (2) is provided with an exhaust pipe (21), the elastic body (42) is provided inside the exhaust pipe (21), the pressure reducing valve body (41) includes a pressurizing portion (44) and an engagement portion (45) set on an outer wall of the exhaust pipe (21), the engagement portion (45) is provided on a bottom wall within the pressurizing portion (44), and the engagement portion (45) reciprocates into the exhaust hole (43).

6. The pressure cooker having a negative vacuum state according to claim 5.

7. The fitting portion (45) is provided in a tapered shape in which the outer diameter gradually decreases from the top.

7. The pressure cooker having a negative vacuum state according to claim 6.

8. The stop valve (5) includes a stop valve body (51), a first sealing ring (52), and a second sealing ring (53). The lid (2) is provided with a lid through-hole (54) through which the stop valve body (51) slides up and down. The first sealing ring (52) is provided at one end of the stop valve body (51) located within the accommodation space (11), and the second sealing ring (53) is provided at the other end of the stop valve body (51). When the storage space (11) is in a pressurized state, the stop valve body (51) moves upward to restrict the opening of the lid (2), and the first sealing ring (52) is moved to seal the lid through-hole (54). When the storage space (11) changes from a high pressure state to a small positive pressure state and enters a negative pressure vacuum state, the stop valve body (51) moves downward by gravity and returns to its initial position, and the gravity of the stop valve (5) causes the second sealing ring (53) to seal the lid through-hole (54).

5. A pressure cooker having a negative vacuum state according to claim 1 or 4.

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