Pot cover with exhausting and air locking functions

Abstract

The utility model discloses a pot cover with exhausting and air locking functions. The pot cover comprises a pot cover body, a cover handle and a rotary disc. A concave position is arranged on the upper side face of the pot cover and internally provided with a center hole, an exhaust hole and a limiting structure. A rotating shaft and a tilting part are arranged on the lower side of the cover handle, a positioning ring linked with the cover handle is placed in the concave position, a notch opposite to the tilting part is formed in the positioning ring, and an exhaust port is formed between the tilting part and the upper side face of the pot cover; a rotating shaft of the cover handle penetrates through the central hole and then is fixed together with the turntable through a screw, a cavity is formed between the upper side surface of the turntable and the lower side surface of the pot cover, a through hole is formed in the turntable, the cavity is communicated with the interior of the pot through the through hole, and a liftable air exhausting and locking structure is mounted in the cavity at the through hole; the notch is configured to rotate in a limiting area of the limiting structure. The pot cover is convenient to exhaust and lock air, can be sealed and pressurized, can exhaust and relieve pressure in a pot in time, can shorten the cooking time, and has the effects of energy conservation and environmental protection.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen cooking utensils, in particular to a pot cover with exhaust and air locking functions. Background Art

[0002] Some cookware on the market lack vents, while others have permanently open vents. During the cooking process, steam escapes through the vents or through the joint between the lid and the pot, causing a large amount of steam to escape. This can cause excessive water loss from the pot, taking away some nutrients and wasting energy. Cookware with permanently open vents consumes more energy during cooking. For cookware without vents, air is exhausted from the joint between the lid and the pot, and the sudden release of steam can sometimes injure the operator. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pot cover with exhaust and air-locking functions.

[0004] The utility model is realized through the following technical solutions: a pot cover with exhaust and air locking function, comprising a pot cover, a lid handle and a turntable; a recess is provided on the upper side of the pot cover, a center hole, an exhaust hole and a limiting structure are provided in the recess; a rotating shaft and a tilting portion are provided on the lower side of the lid handle, a positioning ring linked to the lid handle is placed in the recess, a notch is provided on the positioning ring opposite to the tilting portion, and an exhaust port is formed between the tilting portion and the upper side of the pot cover; the rotating shaft of the lid handle passes through the center hole and is fixed to the turntable by screws The turntable and the pot cover are fixed together, and there is a cavity between the upper side of the turntable and the lower side of the pot cover. The turntable is provided with a through hole, which connects the cavity with the pot, and a liftable air-locking structure is installed in the cavity at the through hole; the notch is arranged to rotate within the limiting area of ​​the limiting structure; when the notch is at an extreme position on one side of the limiting area, the notch, the exhaust hole, the cavity and the through hole together constitute an exhaust channel; when the notch is at an extreme position on the other side of the limiting area, the air-locking structure is lifted up by the air pressure to seal the exhaust hole and is in an air-locking state.

[0005] In this pot lid, the setting of the air exhaust and locking structure can control the rotation of the lid handle at the beginning of cooking to seal and pressurize the pot, improve cooking efficiency, save energy and reduce consumption. When exhaust and pressure relief are needed, the lid handle is controlled to rotate to control the exhaust state; the rotating shaft and the turntable are fixed together, so that the turntable and the lid handle can realize linkage effect; when the lid handle is rotated to the extreme position on one side of the limiting structure, an exhaust channel is formed and the exhaust state is executed; when the lid handle is rotated to the extreme position on the other side of the limiting structure, the air exhaust and locking structure seals the exhaust hole to enter the air locking state.

[0006] The positioning ring is a circular structure with one edge recessed toward the center to form the notch. The positioning ring is provided with a latching hole. The lid handle comprises a lifting member and a cover plate fixedly connected to the lifting member. The tilting portion is disposed on the cover plate, and the rotating shaft is disposed on the underside of the cover plate. A latching post is disposed on the underside of the cover plate. The positioning ring is removably placed in the recessed portion, and the latching post is inserted into the latching hole. The latching post and the latching hole cooperate to achieve a linkage effect between the lid handle and the positioning ring.

[0007] A limiting boss protrudes inward from the inner side of the positioning ring on the other side of the notch. The limiting structure includes a first limiting post and a second limiting post. The limiting boss is configured to move within the area between the first and second limiting posts. The lid handle stops rotating when the limiting boss contacts either limiting post. The limiting boss restricts the range of motion of the positioning ring notch and the lid handle.

[0008] There are three locking holes, each located on the inner side of the positioning ring. The three holes are oriented with the center of the positioning ring as the reference point, and each of them forms a 120-degree angle with each other. There are three locking posts, located on the edge of the same circle. The three locking posts are oriented with the center of the circle as the reference point, and each of them forms a 120-degree angle with each other. The three locking holes and three locking posts are evenly spaced, ensuring uniform force distribution and more stable control.

[0009] The outer periphery of the screw is provided with a shaft sleeve, the lower side of the shaft sleeve presses against the turntable, and the upper side of the shaft sleeve presses against the pot cover. The shaft sleeve can seal the center hole to prevent gas from flowing out of the center hole.

[0010] The upper side of the shaft sleeve is provided with a circle of grooves, in which a sealing ring is installed, and the upper side of the sealing ring presses against the lower side of the pot cover. The sealing ring is installed in the groove to seal the center hole.

[0011] The air-exhausting and locking structure includes a rubber plug and a fixing seat, wherein a through hole is provided in the center of the fixing seat, which passes through the upper and lower sides thereof, and the through hole is connected to the through hole; the fixing seat is installed on the turntable located around the through hole, and a plurality of limiting rods are provided around the fixing seat, and the rubber plug is placed in the fixing seat space between the plurality of limiting rods; the upper side of the rubber plug is recessed downward to form an upper concave cavity, and the lower side of the rubber plug is hollowed out inward to form a lower concave cavity, and the diameter of the rubber plug is larger than the aperture of the exhaust hole; when in the air-locking state, the exhaust hole is aligned with the rubber plug, and the pressure in the pot forces the rubber plug to rise along the limiting rod, and the upper wall of the rubber plug around the upper concave cavity seals the upper side of the pot cover around the exhaust hole. The gas in the pot rushes out from the through hole, enters the through hole and the lower concave cavity, thereby lifting the rubber plug, which can rise along the limit rod. When the fixed seat is aligned with the exhaust hole, the rubber plug rises and seals the exhaust hole to achieve the gas locking function; when the fixed seat is not aligned with the exhaust hole, as long as the air pressure in the pot rises to a certain level, the rubber plug can be raised, and the gas can enter the cavity of the turntable from the through hole.

[0012] There are three limit rods, and the three limit rods are based on the central axis of the fixing seat, and form an angle of 120 degrees between each other; the fixing seat between every two limit rods is recessed from bottom to top, and a lower groove is formed on the lower side, and a convex ridge is formed on the upper side. One end of the lower groove is connected to the through hole, and the other end is connected to the cavity of the turntable; an upper groove is provided on the lower side of the rubber plug, and when the rubber plug droops naturally without force, the convex ridge is embedded in the upper groove.

[0013] The free end of the lifting means extends upwardly and is tilted. The distal end of the free end of the lifting means is folded upward to form a flange. The cover edge of the pot lid and the flange form a supporting structure for the pot lid to stand on a plane.

[0014] The lower end of the lifting means is fixed on the cover plate, and the other end of the lifting means is firstly circled and then extended upwardly.

[0015] Compared with the prior art, the advantages of the utility model are: the pot cover can be used as a pot cover for various kitchen utensils; the exhaust and air locking operation is convenient, and it can be sealed and pressurized, and the exhaust and pressure relief in the pot can be timely performed, which can shorten the cooking time and play an energy-saving and environmental protection role; the lid handle has a standing function, which reduces the space occupied when placing the pot cover, and at the same time avoids the pot cover from contacting the plane, avoiding the pollution caused by the pot cover being placed directly on the plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure decomposition of an embodiment of the utility model;

[0017] Figure 2 This is a front view of an embodiment of the utility model;

[0018] Figure 3 for Figure 2 Middle AA section view;

[0019] Figure 4 for Figure 3 A local enlarged view of point a in the middle;

[0020] Figure 5 A side view of an embodiment of the present utility model;

[0021] Figure 6 for Figure 5 Middle BB section view;

[0022] Figure 7 This is a three-dimensional diagram of an embodiment of the utility model in a gas-locked state;

[0023] Figure 8 This is a three-dimensional diagram of the embodiment of the utility model in the air-locking state with the lifting means and the cover plate removed;

[0024] Figure 9 This is a top view of the embodiment of the utility model in the air-locking state with the lifting means and the cover plate removed;

[0025] Figure 10 for Figure 9 Middle CC section view;

[0026] Figure 11 for Figure 9 Middle DD section view;

[0027] Figure 12 for Figure 8 A three-dimensional image looking upwards without the turntable;

[0028] Figure 13 This is a three-dimensional diagram of the upper side of the embodiment of the utility model when the rotating shaft and the sleeve are matched;

[0029] Figure 14 This is a three-dimensional view from the bottom side of the embodiment of the utility model when the rotating shaft and the sleeve are matched;

[0030] Figure 15 This is a cross-sectional view taken along the longitudinal direction when the rotating shaft and the shaft sleeve are in cooperation with each other in an embodiment of the present utility model;

[0031] Figure 16 This is a schematic structural diagram of a shaft sleeve according to an embodiment of the present utility model;

[0032] Figure 17 This is a cross-sectional view of the shaft sleeve according to an embodiment of the utility model cut along the longitudinal direction;

[0033] Figure 18 This is a three-dimensional diagram of the turntable, shaft sleeve, fixing seat and rubber plug in accordance with an embodiment of the present invention;

[0034] Figure 19 for Figure 1 a cross-sectional view taken along the longitudinal direction;

[0035] Figure 20 This is a front view of the fixing seat and the rubber plug in the embodiment of the utility model;

[0036] Figure 21 for Figure 20 Middle EE section view;

[0037] Figure 22 This is a bottom view of the fixing seat and the rubber plug in the embodiment of the utility model;

[0038] Figure 23 for Figure 22 Middle FF section view;

[0039] Figure 24 This is a three-dimensional diagram of the fixing seat and the rubber plug in the embodiment of the utility model from the upper side;

[0040] Figure 25 This is a three-dimensional view of the fixing seat and the rubber plug in the embodiment of the utility model from the bottom direction;

[0041] Figure 26 This is a three-dimensional view of the upper side of the rubber plug according to an embodiment of the utility model;

[0042] Figure 27 This is a three-dimensional view of the bottom side of the rubber plug according to an embodiment of the present invention;

[0043] Figure 28 This is a cross-sectional view of the rubber plug according to an embodiment of the present invention cut along the longitudinal direction;

[0044] Figure 29 This is a three-dimensional view of the upper side of the fixing seat according to an embodiment of the present utility model;

[0045] Figure 30 A three-dimensional view of the bottom side of the fixing seat according to an embodiment of the present invention;

[0046] Figure 31 This is a top view of a positioning ring according to an embodiment of the present utility model;

[0047] Figure 32 A three-dimensional diagram of a positioning ring according to an embodiment of the present utility model;

[0048] Figure 33 This is a side view of the cover handle of an embodiment of the utility model;

[0049] Figure 34 A perspective view of a cover handle according to an embodiment of the present invention;

[0050] Figure 35This is a schematic structural diagram of an embodiment of the present utility model in an exhaust state;

[0051] Figure 36 This is a front view of the embodiment of the utility model in the exhaust state;

[0052] Figure 37 for Figure 36 Middle GG section view;

[0053] Figure 38 This is a three-dimensional diagram of the embodiment of the utility model in the exhaust state after removing the lifting means and the cover plate;

[0054] Figure 39 This is a top view of the embodiment of the utility model in the exhaust state with the lifting means and the cover plate removed;

[0055] Figure 40 This is a three-dimensional diagram of an embodiment of the utility model in the exhaust state after removing the lifting means, cover plate and turntable.

[0056] The meanings of the reference numerals in the figure are as follows: 1. pot cover; 11. recess; 12. exhaust hole; 21. lifting means; 22. cover plate; 23. tilting part; 24. rotating shaft; 25. clamping column; 26. exhaust port; 27. flange; 3. turntable; 31. through hole; 4. positioning ring; 41. notch; 42. clamping hole; 43. limiting boss; 51. first limiting column; 52. second limiting column; 6. shaft sleeve; 61. groove; 62. sealing ring; 7. fixing seat; 71. through hole; 72. limiting rod; 73. lower groove; 74. ridge; 8. rubber plug; 81. upper concave cavity; 82. lower concave cavity; 83. upper groove; 9. screw. DETAILED DESCRIPTION

[0057] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementations.

[0058] Example

[0059] See Figures 1 to 40, is a pot cover 1 with exhaust and air locking function, comprising a pot cover 1, a lid handle and a turntable 3; a recess 11 is provided on the upper side of the pot cover 1, and a center hole, an exhaust hole 12 and a limiting structure are provided in the recess 11; a rotating shaft 24 and a tilting portion 23 are provided on the lower side of the lid handle, a positioning ring 4 linked to the lid handle is placed in the recess 11, and a notch 41 is opened in the positioning ring 4 corresponding to the tilting portion 23, and an exhaust port 26 is formed between the tilting portion 23 and the upper side of the pot cover 1; the rotating shaft 24 of the lid handle passes through the center hole and is fixed to the turntable 3 by screws 9 There is a cavity between the upper side of the turntable 3 and the lower side of the pot cover 1, and the turntable 3 is provided with a through hole 31, which connects the cavity with the pot, and a liftable air-exhausting and locking structure is installed in the cavity at the through hole 31; the notch 41 is arranged to rotate within the limiting area of ​​the limiting structure; when the notch 41 is at the extreme position on one side of the limiting area, the notch 41, the exhaust hole 12, the cavity, and the through hole 31 together constitute an exhaust channel; when the notch 41 is at the extreme position on the other side of the limiting area, the air-exhausting and locking structure is lifted up by the air pressure to seal the exhaust hole 12 and is in an air-locking state.

[0060] In this pot lid 1, the setting of the air exhaust and locking structure can control the rotation of the lid handle at the beginning of cooking to seal and pressurize the pot, improve cooking efficiency, save energy and reduce consumption, and when exhaust and pressure relief are needed, the lid handle is controlled to rotate to control the exhaust state; the rotating shaft 24 is fixed together with the turntable 3, so that the turntable 3 and the lid handle can realize a linkage effect; when the lid handle is rotated to the extreme position on one side of the limiting structure, an exhaust channel is formed and the exhaust state is executed. When the lid handle is rotated to the extreme position on the other side of the limiting structure, the air exhaust and locking structure seals the exhaust hole 12 and enters the air locking state.

[0061] The positioning ring 4 is an annular structure with one edge recessed toward the center to form a notch 41. The positioning ring 4 is provided with a latching hole 42. The lid handle comprises a lifting member 21 and a cover plate 22 fixedly connected to the lifting member 21. A raised portion 23 is provided on the cover plate 22, and a rotating shaft 24 is provided on the underside of the cover plate 22. A latching post 25 is provided on the underside of the cover plate 22. The positioning ring 4 is removably placed in the recess 11, and the latching post 25 is inserted into the latching hole 42. The cooperation between the latching post 25 and the latching hole 42 enables the lid handle to interlock with the positioning ring 4.

[0062] A stopper 43 protrudes inward from the inner side of the positioning ring 4 on the other side of the notch 41. The stopper structure includes a first stopper post 51 and a second stopper post 52. The stopper 43 is positioned and movable between the first stopper post 51 and the second stopper post 52. The lid handle stops rotating when the stopper 43 strikes either stopper post. The stopper 43 restricts the range of motion of the notch 41 of the positioning ring 4 and the lid handle.

[0063] Three locking holes 42 are provided, one inside the positioning ring 4. Each of the three locking holes 42 forms a 120-degree angle with respect to the center of the positioning ring 4. Three locking posts 25 are provided, located on the edge of the same circle. Each of the three locking posts 25 forms a 120-degree angle with respect to the center of the circle. The three locking holes 42 and the three locking posts 25 are evenly spaced, ensuring uniform force distribution and more stable control.

[0064] The outer periphery of screw 9 is covered with shaft sleeve 6, and shaft sleeve 6 lower side is against rotating disk 3, and shaft sleeve 6 upper side is against pot cover 1. Shaft sleeve 6 can realize sealing effect to center hole, prevents gas from flowing out from center hole.

[0065] A circle groove 61 is provided on the upper side of the shaft sleeve 6, and a sealing ring 62 is installed in the groove 61, and the upper side of the sealing ring 62 is against the lower side of the pot cover 1. The sealing ring 62 is installed in the groove 61, and the center hole can be sealed.

[0066] The air-locking structure includes a plug 8 and a fixing base 7. A through hole 71 is provided in the center of the fixing base 7, which passes through the upper and lower sides thereof, and the through hole 71 is connected to the through hole 31; the fixing base 7 is mounted on the turntable 3 located around the through hole 31, and a plurality of limiting rods 72 are provided around the fixing base 7, and the plug 8 is placed in the space of the fixing base 7 between the plurality of limiting rods 72; the upper side of the plug 8 is recessed downward to form an upper concave cavity 81, and the lower side of the plug 8 is hollowed out inward to form a lower concave cavity 82. The diameter of the plug 8 is larger than the aperture of the exhaust hole 12, which can ensure that the plug 8 can tightly seal the exhaust hole 12 and prevent air leakage; when in the air-locking state, the exhaust hole 12 is aligned with the plug 8, and the pressure in the pot forces the plug 8 to rise along the limiting rod 72, and the upper wall of the plug 8 around the upper concave cavity 81 seals the upper side of the pot lid 1 around the exhaust hole 12. The gas in the pot rushes out from the through hole 31, enters the through hole 71 and the lower concave cavity 82, thereby lifting the plug 8, and the plug 8 can rise along the limit rod 72. When the fixing seat 7 is aligned with the exhaust hole 12, the plug 8 rises and seals the exhaust hole 12, realizing the air locking function; when the fixing seat 7 is not aligned with the exhaust hole 12, as long as the air pressure in the pot rises to a certain level, the plug 8 can be raised, and the gas can enter the cavity of the turntable 3 from the through hole 71.

[0067] There are three limit rods 72, which are based on the central axis of the fixed seat 7 and form an angle of 120 degrees between each other; the fixed seat 7 between every two limit rods 72 is recessed from bottom to top, and a lower groove 73 is formed on its lower side, and a convex ridge 74 is formed on its upper side. One end of the lower groove 73 is connected to the through hole 71, and the other end is connected to the cavity of the turntable 3; an upper groove 83 is formed on the lower side of the rubber plug 8. When the rubber plug 8 droops naturally without force, the convex ridge 74 is embedded in the upper groove 83.

[0068] The free end of the lifting member 21 extends upwardly and is folded upwardly to form a flange 27 . The cover edge of the pot lid 1 and the flange 27 form a support structure for the pot lid 1 to stand upright on a plane.

[0069] The lower end of the lifting means 21 is fixed on the cover plate 22, and the other end of the lifting means 21 first circles around and then extends upward.

[0070] Assembly of this embodiment:

[0071] 1) Place the positioning ring 4 inside the cover plate 22 of the cover handle so that the positioning ring 4 is locked with the clamping column 25 on the cover handle.

[0072] 2) Turn the lid handle downwards, so that the shaft 24 passes through the center hole of the pot lid 1, and the opening of the positioning ring 4 faces the exhaust hole 12 of the pot lid 1, and the left side of the limiting boss 43 set on the positioning ring 4 is tangent to the first limiting column 51 (as shown in FIG. Figure 3 shown);

[0073] 3) Place the sealing ring 62 on the groove 61 set in the sleeve 6;

[0074] 4) Place the shaft sleeve 6 below the center of the pot lid 1, and thread the shaft sleeve 6 onto the lid handle shaft 24 from bottom to top;

[0075] 5) Place the fixing base 7 above the center of the through hole 31 of the turntable 3, and weld the fixing base 7 to the top of the turntable 3 from top to bottom;

[0076] 6) Place the rubber plug 8 on top of the fixing seat 7 so that it can move freely up and down.

[0077] 7) Place the turntable 3 inside the pot lid 1 so that the center hole of the turntable 3 is concentric with the lid handle shaft 24, and then use screws 9 to lock the turntable 3 and the lid handle shaft 24.

[0078] The working principle of this embodiment is as follows:

[0079] 1) Exhaust state: The left side of the limiting boss 43 of the positioning ring 4 is tangent to the first limiting post 51 above the pot lid 1. The gas in the pot passes through the gap between the turntable 3 and the pot lid 1 (the gas in the pot first enters the through-hole 71 of the fixing seat 7 through the through-hole 31 of the turntable 3 and enters the cavity between the turntable 3 and the lower side of the pot lid 1), and then is discharged out of the pot through the exhaust hole 12 of the pot lid 1 and the exhaust port 26 of the cover plate 22. In the exhaust state, regardless of whether the air pressure in the pot is sufficient to lift the plug 8, the gas in the through-hole 71 can enter the cavity of the turntable 3; when the air pressure is high enough, the plug 8 rises, and the gas enters the cavity directly from the gap between the plug 8 and the fixing seat 7; when the air pressure is low, the gas can enter the cavity through the lower groove 73.

[0080] 2) Air-locking state: Turn the lid handle clockwise, and the clamping column 25 below the lid handle drives the positioning ring 4 to rotate clockwise. Since the turntable 3 and the handle are locked by the screw 9, the turntable 3 and the fixing seat 7 and the rubber plug 8 rotate clockwise synchronously. When the right side of the limiting boss 43 of the positioning ring 4 is tangent to the second limiting column 52 above the pot cover 1, the lid handle stops rotating. At this time, when there is air pressure in the pot, the rubber plug 8 automatically rises to make it concentric with the exhaust hole 12 on the pot cover 1 and blocks the exhaust hole 12. The gas in the pot cannot be discharged through the air hole of the pot cover 1, forming a sealed air-locking state. The steam water condensed on the turntable 3 can flow back into the pot through the through hole 31 set on the turntable 3 below the fixing seat 7.

[0081] The innovations of this embodiment are as follows:

[0082] Integrated exhaust and air locking design: In the air locking state, the rubber plug 8 on the fixed seat 7 automatically rises and can block the exhaust hole 12 from bottom to top (the rubber plug 8 of the exhaust pot on the market is basically on the pot cover 1, while the rubber plug 8 of our design is inside the pot cover 1) to lock the air. The refluxed condensed water can flow back into the pot through the channel (through hole 31) set on the bottom surface of the fixed seat 7.

[0083] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. A pot lid with exhaust and air-locking function, characterized by: The lid comprises a pot cover, a lid handle and a turntable; the upper side of the pot cover is provided with a recess, a center hole, an exhaust hole and a limiting structure are provided in the recess; the lower side of the lid handle is provided with a rotating shaft and a tilting portion, the recess is provided with a positioning ring linked to the lid handle, the positioning ring is provided with a notch opposite to the tilting portion, and an exhaust port is formed between the tilting portion and the upper side of the pot cover; the rotating shaft of the lid handle passes through the center hole and is fixed to the turntable by screws, a cavity is provided between the upper side of the turntable and the lower side of the pot cover, the turntable is provided with a through hole, the through hole connects the cavity with the pot, and a liftable air-locking structure is installed in the cavity at the through hole; the notch is arranged to rotate within the limiting area of ​​the limiting structure; when the notch is in the extreme position on one side of the limiting area, the notch, the exhaust hole, the cavity and the through hole together constitute an exhaust channel; when the notch is in the extreme position on the other side of the limiting area, the air-locking structure is lifted up by air pressure to seal the exhaust hole and is in an air-locking state.

2. The pot cover with exhaust and air-locking function according to claim 1, characterized in that: The positioning ring is a circular ring structure, one edge of which is recessed toward the center of the circle to form the notch, and the positioning ring is provided with a clamping hole; the cover handle includes a lifting means and a cover plate fixedly connected to the lifting means, the raised portion is provided on the cover plate, and the rotating shaft is provided on the lower side of the cover plate; a clamping column is provided on the lower side of the cover plate, the positioning ring is detachably placed in the recessed position, and the clamping column is embedded in the clamping hole.

3. The pot cover with exhaust and air-locking function according to claim 2, characterized in that: The inner side of the positioning ring on the other side of the notch protrudes inward to form a limiting boss, and the limiting structure includes a first limiting column and a second limiting column. The limiting boss is configured to move in the area between the first limiting column and the second limiting column. After the limiting boss touches any limiting column, the cover handle stops rotating.

4. The pot cover with exhaust and air-locking function according to claim 2, characterized in that: There are three clamping holes, which are respectively arranged on the inner side of the positioning ring. The three clamping holes are based on the center of the positioning ring, and each of them forms an angle of 120 degrees with each other; there are three clamping columns, which are located on the edge of the same circle. The three clamping columns are based on the center of the circle they are located in, and each of them forms an angle of 120 degrees with each other.

5. The pot cover with exhaust and air-locking function according to claim 1, characterized in that: The outer periphery of the screw is provided with a shaft sleeve, the lower side of the shaft sleeve presses against the turntable, and the upper side of the shaft sleeve presses against the pot cover.

6. The pot cover with exhaust and air-locking function according to claim 5, characterized in that: A circle of grooves is provided on the upper side of the shaft sleeve, a sealing ring is installed in the groove, and the upper side of the sealing ring presses against the lower side of the pot cover.

7. The pot cover with exhaust and air-locking function according to claim 1, characterized in that: The air-exhausting and locking structure includes a rubber plug and a fixing seat, wherein a through hole is provided in the center of the fixing seat, which passes through the upper and lower sides thereof, and the through hole is connected to the through hole; the fixing seat is installed on the turntable located around the through hole, and a plurality of limiting rods are provided around the fixing seat, and the rubber plug is placed in the fixing seat space between the plurality of limiting rods; the upper side of the rubber plug is recessed downward to form an upper concave cavity, and the lower side of the rubber plug is hollowed out inward to form a lower concave cavity, and the diameter of the rubber plug is larger than the aperture of the exhaust hole; when in the air-locking state, the exhaust hole is aligned with the rubber plug, and the pressure in the pot forces the rubber plug to rise along the limiting rod, and the upper wall of the rubber plug around the upper concave cavity seals the upper side of the pot cover around the exhaust hole.

8. The pot cover with exhaust and air-locking function according to claim 7, characterized in that: There are three limit rods, and the three limit rods are based on the central axis of the fixing seat, and form an angle of 120 degrees between each other; the fixing seat between every two limit rods is recessed from bottom to top, and a lower groove is formed on the lower side, and a convex ridge is formed on the upper side. One end of the lower groove is connected to the through hole, and the other end is connected to the cavity of the turntable; an upper groove is provided on the lower side of the rubber plug, and when the rubber plug droops naturally without force, the convex ridge is embedded in the upper groove.

9. The pot cover with exhaust and air-locking function according to claim 2, characterized in that: The free end of the lifting means extends upwardly and is tilted. The distal end of the free end of the lifting means is folded upward to form a flange. The cover edge of the pot lid and the flange form a supporting structure for the pot lid to stand on a plane.

10. The pot cover with exhaust and air-locking function according to claim 2, characterized in that: The lower end of the lifting means is fixed on the cover plate, and the other end of the lifting means is firstly circled and then extended upwardly.

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