Food preparation utensils

Abstract

A food preparation utensil comprises: a pot body; a heating device for heating food in the pot body; a pot cover, which is arranged on the pot body, and the pot cover comprises a surface cover, an inner lining and an inner cover, a sealing part is arranged on the pot cover, a sealing cavity is arranged in the sealing part, and an air extraction port connecting the sealing cavity with the inside of the pot body is arranged on the inner cover; a float is movably arranged in the air extraction port, and the float has a negative pressure position for connecting the sealing cavity with the inside of the pot body and a sealing position for disconnecting the sealing cavity from the inside of the pot body; a driving mechanism for driving the float to switch between the sealing position and the negative pressure position, or driving the float to move from the negative pressure position to the sealing position, and the float is reset from the sealing position to the negative pressure position under the action of gravity; an air extraction device is arranged in the pot cover, and the air suction port of the air extraction device is connected with the sealing cavity. The technical solution of the present invention can effectively solve the problem that the food preparation utensil in the prior art cannot effectively realize the opening and closing of the air extraction port.

Description

Technical Field

[0001] The present invention relates to small household appliances, and in particular to a food preparation utensil. Background Art

[0002] At present, electric pressure cookers and rice cookers have become common household kitchen appliances. Electric pressure cookers and rice cookers on the market all have reservation and insulation functions. In summer, the outside temperature is high. When reservation or insulation is used for a long time, rice, broth and other foods often become soaked and spoiled, resulting in a poor user experience. At present, freshness is usually preserved by means of vacuuming, freezing and the like. The most convenient and easy-to-use negative pressure preservation solution in the field of small household appliances. However, at present, there is no effective structure on the electric pressure cooker that can realize the opening and closing of the vacuum port of the electric pressure cooker. Summary of the invention

[0003] The main purpose of the present invention is to provide a food preparation device to solve the problem that the food preparation device in the prior art cannot effectively realize the opening and closing of the air suction port.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a food preparation utensil, comprising: a pot body, the pot body is used to hold food to be cooked; a heating device, heating the food in the pot body; a pot cover, the pot cover is arranged on the pot body, the pot cover comprises a surface cover, a lining and an inner cover arranged in sequence from top to bottom, the pot cover is provided with a sealing part, a sealing cavity is provided in the sealing part, and an air extraction port connecting the sealing cavity with the inside of the pot body is provided on the inner cover; a float, movably arranged in the air extraction port, the float has a negative pressure position that connects the sealing cavity with the inside of the pot body and a sealing position that disconnects the sealing cavity from the inside of the pot body; a driving mechanism, driving the float to switch between the sealing position and the negative pressure position, or driving the float to move from the negative pressure position to the sealing position, and the float is reset from the sealing position to the negative pressure position under the action of gravity; an air extraction device, arranged in the pot cover, and the air suction port of the air extraction device is connected with the sealing cavity.

[0005] By applying the technical solution of the present invention, the food preparation utensil includes: a float movably arranged in the air extraction port, the float having a negative pressure position that connects the sealed cavity with the interior of the pot body, and a sealing position that disconnects the sealed cavity from the interior of the pot body. A driving mechanism drives the float to switch between the sealing position and the negative pressure position, or drives the float to move from the negative pressure position to the sealing position, and the float is reset from the sealing position to the negative pressure position under the action of gravity. The above structure can realize the opening and closing of the air extraction port. When the air is extracted, the air extraction port is opened, so that the inner pot is in a negative pressure state. When the food preparation utensil is cooking food, the air extraction port can be blocked, so that the food preparation utensil can be pressed normally to ensure the cooking effect, solving the problem that the food preparation utensil in the prior art cannot effectively realize the opening and closing of the air extraction port. In addition, the above structure is simple and easy to assemble, which improves production efficiency and reduces production costs.

[0006] Furthermore, an installation port is provided on the inner liner, and the sealing part includes a sealing cover arranged at the installation port and a sealing ring arranged between the installation port and the inner cover, the sealing cover, the sealing ring and the inner cover together form a sealed cavity, and the sealing cover is provided with a through hole connected to the air intake port.

[0007] Furthermore, a first magnetic block is arranged on the float, the first magnetic block has a first magnetic pole, the driving mechanism has a second magnetic pole and a third magnetic pole, the first magnetic pole is attracted to the second magnetic pole and repels the third magnetic pole, when the first magnetic pole corresponds to the second magnetic pole, the float is moved to the sealing position by the attraction of the second magnetic pole, and when the first magnetic pole corresponds to the third magnetic pole, the float is moved to the negative pressure position by the repulsion of the third magnetic pole.

[0008] Furthermore, the driving mechanism includes a first rotating bracket, which is pivotally arranged on the lining and rotates on a horizontal plane. A second magnetic block and a third magnetic block are arranged on the first rotating bracket, the second magnetic block has a second magnetic pole, and the third magnetic block has a third magnetic pole.

[0009] Furthermore, a driving plate is arranged on the first rotating bracket, and the driving mechanism further comprises a first solenoid valve and an elastic member arranged on both sides of the driving plate, a push rod of the first solenoid valve contacts the driving plate, and the elastic member contacts the driving plate.

[0010] Furthermore, a flow channel is provided on the float. When the float is at a negative pressure position, the sealed cavity is connected with the interior of the pot body through the flow channel. When the float is at a sealed position, the flow channel is blocked by the inner wall of the air suction port.

[0011] Furthermore, the float includes a first column section and a second column section, the first column section is movably arranged in the air suction port, the first magnetic block is arranged on the top of the second column section, the outer diameter of the second column section is larger than the diameter of the air suction port, the flow channel is a flow hole, one end of the flow hole is arranged on the side wall of the first column section, and the other end of the flow hole is arranged on the side wall of the second column section.

[0012] Furthermore, a sealing structure is provided at the bottom end of the float. When the float is located at the sealing position, the sealing structure abuts against the bottom surface of the inner cover to seal the gap between the float and the air extraction port.

[0013] Furthermore, a first magnetic block is arranged on the float, the first magnetic block has a first magnetic pole, the driving mechanism has a fourth magnetic pole, the first magnetic pole and the fourth magnetic pole attract each other, when the first magnetic pole corresponds to the fourth magnetic pole, the float is moved to the sealing position by the attraction of the fourth magnetic pole, when the fourth magnetic pole is away from the first magnetic pole, the float is reset from the sealing position to the negative pressure position under the action of gravity.

[0014] Furthermore, the driving mechanism also includes a second rotating bracket, which is pivotally arranged on the inner lining, and the second rotating bracket rotates in a vertical plane. A fourth magnetic block is arranged on the second rotating bracket, and the fourth magnetic block has a fourth magnetic pole.

[0015] Furthermore, the fourth magnetic block is arranged at the first end of the second rotating bracket, the pivot of the second rotating bracket is arranged between the first end and the second end of the second rotating bracket, and the driving mechanism also includes a second solenoid valve, and the driving rod of the second solenoid valve cooperates with the second end of the second rotating bracket to enable the second rotating bracket to rotate in a vertical plane.

[0016] Furthermore, the driving mechanism also includes a push rod structure, which is arranged on the driving rod, and the push rod structure has a mating surface that cooperates with the second rotating bracket, the mating surface includes a first mating surface, a second mating surface, and a mating inclined surface connecting the first mating surface and the second mating surface, and the distance between the mating inclined surface and the lining gradually increases in the direction away from the second solenoid valve.

[0017] Furthermore, the second end of the second rotating bracket is provided with a guiding inclined surface matching with the matching surface.

[0018] Furthermore, a limiting portion is provided at the second end of the second rotating bracket, and both sides of the push rod structure cooperate with the limiting portion so that the push rod structure can move in a predetermined direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 A schematic diagram of the exploded structure of the food preparation utensil according to the first embodiment of the present invention is shown;

[0021] Figure 2 Shows Figure 1 A schematic diagram of an exploded structure of a food preparation utensil from another angle;

[0022] Figure 3 Shows Figure 1 A schematic longitudinal cross-sectional view of a food preparation utensil with a float in a sealed position;

[0023] Figure 4 Shows Figure 3 An enlarged structural schematic diagram of a food preparation utensil at A;

[0024] Figure 5 Shows Figure 3 A schematic diagram of a top view of the structure of the lining of a food preparation utensil;

[0025] Figure 6 Shows Figure 5 An enlarged structural schematic diagram of a food preparation utensil at B;

[0026] Figure 7 Shows Figure 1 A schematic longitudinal cross-sectional view of a food preparation device with a float in a suction position;

[0027] Figure 8 Shows Figure 7 An enlarged structural schematic diagram of a food preparation utensil at C;

[0028] Fig. 9 Shows Figure 7 A schematic diagram of a top view of the structure of the lining of a food preparation utensil;

[0029] Fig.10 Shows Fig. 9 An enlarged structural schematic diagram of a food preparation utensil at D;

[0030] Fig.11 A schematic diagram of the exploded structure of the second embodiment of the food preparation utensil according to the present invention is shown;

[0031] Fig.12 Shows Fig.11 A schematic diagram of a partial cross-sectional structure of a food preparation utensil when the float is in a suction position;

[0032] Fig.13 Shows Fig.12 A partial enlarged structural schematic diagram of a food preparation utensil;

[0033] Fig.14 Shows Fig.11 A schematic partial cross-sectional view of the food preparation utensil when the float is in a sealed position;

[0034] Fig.15 Shows Fig.14 A partial enlarged structural schematic diagram of a food preparation utensil;

[0035] Fig.16 Shows Fig.11 A schematic diagram of a three-dimensional structure of a push rod structure of a food preparation utensil; and

[0036] Fig.17 Shows Fig.11 Schematic diagram of the three-dimensional structure of the second rotating bracket of the food preparation appliance.

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

[0038] 10. pot body; 20. pot cover; 22. lining; 23. inner cover; 231. exhaust port; 30. sealing part; 31. sealing cavity; 32. sealing cover; 321. through hole; 33. sealing ring; 40. float; 41. flow channel; 42. first column section; 43. second column section; 44. sealing structure; 51. second magnetic block; 52. third magnetic block; 53. first rotating bracket; 531. driving plate; 54. first solenoid valve; 541. push rod; 55. elastic member; 56. fourth magnetic block; 57. second rotating bracket; 571. pivot; 572. limit part; 573. guiding slope; 58. second solenoid valve; 581. driving rod; 59. push rod structure; 591. first matching surface; 592. second matching surface; 593. matching slope; 60. exhaust device; 70. first magnetic block. 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] like Figures 1 to 10 As shown, the food preparation device of the first embodiment includes: a pot body 10, a heating device, a pot cover 20, a float 40, a driving mechanism and an exhaust device 60. The pot body 10 is used to hold food to be cooked. The heating device heats the food in the pot body 10. The pot cover 20 is arranged on the pot body 10, and the pot cover 20 includes a surface cover, a lining 22 and an inner cover 23 arranged in sequence from top to bottom. The pot cover 20 is provided with a sealing portion 30, and a sealing cavity 31 is arranged in the sealing portion 30. The inner cover 23 is provided with an exhaust port 231 connecting the sealing cavity 31 with the inside of the pot body 10. The float 40 is movably arranged in the exhaust port 231, and the float 40 has a negative pressure position that connects the sealing cavity 31 with the inside of the pot body 10 and a sealing position that does not connect the sealing cavity 31 with the inside of the pot body 10. The driving mechanism drives the float 40 to switch between the sealing position and the negative pressure position. The air extraction device 60 is disposed in the pot cover 20 and an air suction port of the air extraction device 60 is communicated with the sealing cavity 31 .

[0041] According to the technical solution of the first embodiment, the food preparation utensil includes: a float movably arranged in the air suction port, the float having a negative pressure position that connects the sealed cavity with the interior of the pot body and a sealed position that disconnects the sealed cavity from the interior of the pot body. A driving mechanism drives the float to switch between the sealed position and the negative pressure position. The above structure can realize the opening and closing of the air suction port. When the air is pumped, the air suction port is opened, so that the inner pot is in a negative pressure state. When the food preparation utensil is cooking food, the air suction port can be blocked, so that the food preparation utensil can be pressed normally to ensure the cooking effect, which solves the problem in the prior art that the food preparation utensil cannot effectively realize the opening and closing of the air suction port. In addition, the above structure is simple and easy to assemble, which improves the production efficiency and reduces the production cost.

[0042] When the air is pumped out, the driving mechanism drives the float 40 to move, so that the float 40 opens the air pumping port 231 to pump out the air. In order to ensure that the sealing cavity 31 of the sealing part forms a sealed space with the inside of the pot body 10 during the air pumping, Figure 1 As shown, in the first embodiment, the inner liner 22 is provided with a mounting port, and the sealing portion includes a sealing cover 32 provided at the mounting port and a sealing ring 33 provided between the mounting port and the inner cover 23. The sealing cover 32, the sealing ring 33 and the inner cover 23 together form a sealing cavity 31, and the sealing cover 32 is provided with a through hole 321 connected to the air intake port. The sealing ring 33 is provided between the inner liner 22 and the inner cover 23 to prevent air from entering the gap between the inner liner 22 and the inner cover 23 during air extraction, causing air leakage, thereby affecting the air extraction efficiency of the air extraction.

[0043] like Figure 4 and Figure 8 As shown, in the first embodiment, a first magnetic block 70 is arranged on the float 40, the first magnetic block 70 has a first magnetic pole, the driving mechanism has a second magnetic pole and a third magnetic pole, the first magnetic pole attracts the second magnetic pole and repels the third magnetic pole, when the first magnetic pole corresponds to the second magnetic pole, the float 40 is moved to the sealing position by the attraction of the second magnetic pole, and when the first magnetic pole corresponds to the third magnetic pole, the float 40 is moved to the negative pressure position by the repulsion of the third magnetic pole. When the air is pumped, the third magnetic pole repels the first magnetic pole, the float with the first magnetic block 70 moves down quickly to the negative pressure position, and is always kept at the negative pressure position due to the action of the magnetic force. When the food needs to be cooked, the second magnetic pole attracts the first magnetic pole, the float with the first magnetic block 70 moves up quickly to the sealing position, and is always kept at the sealing position due to the action of the magnetic force. The above structure is simple and easy to implement. Since the direct contact between the driving mechanism and the float 40 is avoided, the sealing performance is good.

[0044] like Figures 1 to 10As shown, in the first embodiment, the driving mechanism also includes a first rotating bracket 53, and the first rotating bracket 53 is pivotally arranged on the inner lining 22, and the first rotating bracket 53 rotates in a horizontal plane, and the second magnetic block 51 and the third magnetic block 52 are arranged on the first rotating bracket 53. The second magnetic block 51 has a second magnetic pole, and the third magnetic block 52 has a third magnetic pole. Specifically, the first rotating bracket has a bracket body and a pivot shaft arranged at the first end of the bracket body, and the axial direction of the pivot shaft is perpendicular to the inner cover 23. The above structure enables the first rotating bracket 53 to rotate in a horizontal plane. The second magnetic block 51 and the third magnetic block 52 are arranged at the second end of the first rotating bracket 53. When the first rotating bracket 53 swings along its pivot axis, the second magnetic block 51 and the third magnetic block 52 also swing accordingly. As shown Figure 4 As shown, when the second magnetic block 51 swings to the top of the first magnetic block 70, the first magnetic block 70 is attracted and moves upward to the sealing position. Figure 8 As shown, when the third magnetic block 52 swings to above the first magnetic block 70, the first magnetic block 70 is moved to the sealing position by the repulsive force.

[0045] Preferably, the first magnetic block 70, the second magnetic block 51 and the third magnetic block 52 are all permanent magnets. The above structure is simple and low in cost.

[0046] like Figure 5 , Figure 6 , Fig. 9 and Fig.10 As shown, in the first embodiment, a driving plate 531 is provided on the first rotating bracket 53, and the driving mechanism further includes a first electromagnetic valve 54 and an elastic member 55 provided on both sides of the driving plate 531, and the push rod 541 of the first electromagnetic valve 54 contacts the driving plate 531, and the elastic member 55 contacts the driving plate 531. When the push rod 541 moves toward the driving plate 531, the push rod 541 drives the first rotating bracket 53 to swing, and the elastic member 55 begins to compress. When the float 40 needs to switch from the sealing position to the negative pressure position or from the negative pressure position to the sealing position, the push rod 541 of the first electromagnetic valve 54 moves in a direction away from the driving plate 531, and the driving plate 531 swings in the opposite direction under the action of the elastic restoring force of the elastic member 55. The above structure is simple and easy to implement. Preferably, the driving plate 531 is an arc-shaped plate, and the above structure enables the push rod 541 to always remain perpendicular to the driving plate 531 when pushing the driving plate 531, so that the driving plate 531 is easier to push.

[0047] like Figure 6 and Fig.10 As shown, in the first embodiment, limiting columns for limiting the swing angle of the first rotating bracket 53 are arranged on both sides thereof. The above structure can ensure that the first rotating bracket 53 rotates within a predetermined angle.

[0048] Since the second magnetic block 51 and the third magnetic block 52 with a relatively heavy mass are arranged at the second end of the first rotating bracket 53, in order to prevent the second end of the first rotating bracket 53 from sinking due to its heavy mass, Figure 6 and Fig.10 As shown, in the first embodiment, a support rib is provided on the inner lining 22, and the support rib is located below the first rotating bracket 53. The above structure can support the first rotating bracket 53 and prevent the second end of the first rotating bracket 53 from sinking.

[0049] like Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, in the first embodiment, a flow passage 41 is provided on the float 40. When the float 40 is located at the negative pressure position, the sealed cavity 31 is connected with the interior of the pot body 10 through the flow passage 41. When the float 40 is located at the sealing position, the flow passage 41 is blocked by the inner wall of the air extraction port 231. The above structure is simple and easy to implement.

[0050] like Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, in the first embodiment, the float 40 includes a first column section 42 and a second column section 43, the first column section 42 is movably arranged in the air extraction port 231, the first magnetic block 70 is arranged at the top of the second column section 43, the outer diameter of the second column section 43 is larger than the diameter of the air extraction port 231, the flow passage 41 is a flow hole, one end of the flow hole is arranged on the side wall of the first column section 42, and the other end of the flow hole is arranged on the side wall of the second column section 43. When the float 40 is located at the air extraction position, the sealing cavity 31 is connected with the pot body 10 through the flow passage 41, and when the float 40 is located at the sealing position, the flow passage 41 is blocked by the inner wall of the air extraction port 231. The above structure is simple and easy to implement.

[0051] In order to ensure that the float 40 can completely seal the gap between the float and the air suction port 231 when it is in the sealing position. Figure 4 and Figure 8 As shown, in the first embodiment, a sealing structure 44 is disposed at the bottom end of the float 40 . When the float 40 is located at the sealing position, the sealing structure 44 abuts against the bottom surface of the inner cover 23 .

[0052] like Figures 11 to 15 As shown, the difference between the food preparation device of the second embodiment and the food preparation device of the first embodiment is that the driving mechanism drives the float 40 to move from the negative pressure position to the sealing position, and the float 40 is reset from the sealing position to the negative pressure position under the action of gravity. Specifically, in the second embodiment, the float 40 is provided with a first magnetic block 70, the first magnetic block 70 has a first magnetic pole, the driving mechanism has a fourth magnetic pole, the first magnetic pole and the fourth magnetic pole are attracted to each other, as shown in FIG. Fig.13 As shown, when the first magnetic pole corresponds to the fourth magnetic pole, the float 40 is attracted by the fourth magnetic pole and moves to the sealing position. Fig.12 As shown, when the fourth magnetic pole is away from the first magnetic pole, the float 40 is reset from the sealing position to the negative pressure position under the action of gravity. Specifically, the first magnetic pole and the fourth magnetic pole can attract each other within a predetermined distance range. When the fourth magnetic pole moves beyond the predetermined distance range, the fourth magnetic pole and the first magnetic pole will no longer attract each other, and the float 40 moves downward to the negative pressure position due to its gravity.

[0053] like Figures 11 to 15 As shown, in the second embodiment, the driving mechanism further includes a second rotating bracket 57, which is pivotally arranged on the inner liner 22, and the second rotating bracket 57 rotates in a vertical plane. A fourth magnetic block 56 is arranged on the second rotating bracket 57, and the fourth magnetic block 56 has a fourth magnetic pole. Specifically, the first magnetic block 70 and the fourth magnetic block 56 can attract each other within a predetermined distance range. When the fourth magnetic block 56 moves beyond the predetermined distance range, the fourth magnetic block 56 will no longer attract the first magnetic block 70, and the float 40 moves downward to the negative pressure position due to its gravity. The above structure is simple and easy to implement.

[0054] like Figures 11 to 15 As shown, in the second embodiment, the fourth magnetic block 56 is arranged at the first end of the second rotating bracket 57, the pivot 571 of the second rotating bracket 57 is arranged between the first end and the second end of the second rotating bracket 57, and the driving mechanism also includes a second electromagnetic valve 58, and the driving rod 581 of the second electromagnetic valve 58 cooperates with the second end of the second rotating bracket 57 to make the second rotating bracket 57 rotate in the vertical plane. Specifically, the axial direction of the pivot 571 is in the horizontal plane, and is located between the first end and the second end to form a lever mechanism. When the driving rod 581 of the second electromagnetic valve 58 cooperates with the second end of the second rotating bracket 57, the second end of the second rotating bracket 57 is pressed downward, and the first end of the second rotating bracket 57 is lifted upward, so that the fourth magnetic block 56 moves to outside the above-mentioned predetermined distance range.

[0055] like Figures 11 to 16As shown, in the second embodiment, the driving mechanism further includes a push rod structure 59, which is arranged on the driving rod 581. The push rod structure 59 has a mating surface that is mating with the second rotating bracket 57, and the mating surface includes a first mating surface 591, a second mating surface 592, and a mating inclined surface 593 connecting the first mating surface 591 and the second mating surface 592, and the distance between the mating inclined surface 593 and the liner 22 gradually increases in the direction away from the second solenoid valve 58. When the push rod structure 59 moves toward the second rotating bracket 57, the second end of the second rotating bracket 57 contacts the mating inclined surface 593, and the second end of the second rotating bracket 57 rotates downward along with the mating inclined surface 593, and the first end of the second rotating bracket 57 is lifted upward. The above structure is simple and easy to process.

[0056] like Fig.11 and Fig.17 As shown, in the second embodiment, the second end of the second rotating bracket 57 is provided with a guide inclined surface 573 that matches with the matching surface. When the push rod structure 59 moves toward the second rotating bracket 57, the first matching surface 591 of the push rod structure 59 first contacts with the guide inclined surface 573, so that the matching inclined surface 593 of the push rod structure 59 can smoothly match with the second end of the second rotating bracket 57.

[0057] like Fig.11 and Fig.17 As shown, in the second embodiment, a limiting portion 572 is provided at the second end of the second rotating bracket 57, and the above structure enables the push rod structure 59 to move in a predetermined direction. Preferably, the limiting portion 572 is two limiting baffles arranged opposite to each other, and the push rod structure 59 is limited between the two limiting baffles.

[0058] It should be noted that the food preparation utensil of the present application is a cooking utensil, which may specifically be an electric pressure cooker, an electric rice cooker, etc.

[0059] 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 food preparation utensil, characterized in that: include: A pot body (10), wherein the pot body (10) is used to hold food to be cooked; A heating device for heating food in the pot (10); A pot cover (20) is arranged on the pot body (10), the pot cover (20) comprises a surface cover, an inner lining (22) and an inner cover (23) which are arranged in sequence from top to bottom, the pot cover (20) is provided with a sealing portion (30), a sealing cavity (31) is arranged in the sealing portion (30), and the inner cover (23) is provided with an air extraction port (231) which communicates the sealing cavity (31) with the interior of the pot body (10); A float (40) is movably arranged in the air extraction port (231), the float (40) having a negative pressure position in which the sealed cavity (31) is connected to the interior of the pot body (10) and a sealing position in which the sealed cavity (31) is not connected to the interior of the pot body (10), and a sealing structure (44) is arranged at the bottom end of the float (40). When the float (40) is located at the sealing position, the sealing structure (44) abuts against the bottom surface of the inner cover (23) to seal the gap between the float (40) and the air extraction port (231); A driving mechanism drives the float (40) to switch between the sealing position and the negative pressure position, or drives the float (40) to move from the negative pressure position to the sealing position, and the float (40) is reset from the sealing position to the negative pressure position under the action of gravity; An air extraction device (60) is arranged in the pot cover (20) and an air suction port of the air extraction device (60) is connected to the sealed cavity (31).

2. The food preparation utensil according to claim 1, characterized in that: The inner liner (22) is provided with a mounting opening, the sealing portion (30) comprises a sealing cover (32) provided at the mounting opening and a sealing ring (33) provided between the mounting opening and the inner cover (23), the sealing cover (32), the sealing ring (33) and the inner cover (23) together form the sealing cavity (31), and the sealing cover (32) is provided with a through hole (321) connected with the air intake port.

3. The food preparation utensil according to claim 1, characterized in that: The float (40) is provided with a first magnetic block (70), the first magnetic block (70) has a first magnetic pole, the driving mechanism has a second magnetic pole and a third magnetic pole, the first magnetic pole is attracted to the second magnetic pole and repels the third magnetic pole, when the first magnetic pole corresponds to the second magnetic pole, the float (40) is moved to the sealing position by the attraction of the second magnetic pole, and when the first magnetic pole corresponds to the third magnetic pole, the float (40) is moved to the negative pressure position by the repulsion of the third magnetic pole.

4. The food preparation utensil according to claim 3, characterized in that: The driving mechanism comprises a first rotating bracket (53), the first rotating bracket (53) is pivotally arranged on the lining (22), the first rotating bracket (53) rotates on a horizontal plane, a second magnetic block (51) and a third magnetic block (52) are arranged on the first rotating bracket (53), the second magnetic block (51) has the second magnetic pole, and the third magnetic block (52) has the third magnetic pole.

5. The food preparation utensil according to claim 4, characterized in that: A driving plate (531) is arranged on the first rotating bracket (53), and the driving mechanism further comprises a first solenoid valve (54) and an elastic member (55) arranged on both sides of the driving plate (531), a push rod (541) of the first solenoid valve (54) contacts the driving plate (531), and the elastic member (55) contacts the driving plate (531).

6. The food preparation utensil according to claim 3, characterized in that: The float (40) is provided with an overflow channel (41); when the float (40) is located at the negative pressure position, the sealed cavity (31) is connected to the interior of the pot body (10) through the overflow channel (41); when the float (40) is located at the sealed position, the overflow channel (41) is blocked by the inner wall of the air extraction port (231).

7. The food preparation utensil according to claim 6, characterized in that The float (40) comprises a first column section (42) and a second column section (43); the first column section (42) is movably arranged in the air suction port (231); the first magnetic block (70) is arranged on the top of the second column section (43); the outer diameter of the second column section (43) is larger than the diameter of the air suction port (231); the flow channel (41) is a flow hole; one end of the flow hole is arranged on the side wall of the first column section (42); and the other end of the flow hole is arranged on the side wall of the second column section (43).

8. The food preparation utensil according to claim 1, characterized in that: The float (40) is provided with a first magnetic block (70), the first magnetic block (70) has a first magnetic pole, the driving mechanism has a fourth magnetic pole, the first magnetic pole and the fourth magnetic pole are attracted to each other, when the first magnetic pole corresponds to the fourth magnetic pole, the float (40) is moved to the sealing position by the attraction of the fourth magnetic pole, when the fourth magnetic pole is away from the first magnetic pole, the float (40) is reset from the sealing position to the negative pressure position under the action of gravity.

9. The food preparation utensil according to claim 8, characterized in that The driving mechanism also includes a second rotating bracket (57), which is pivotally arranged on the lining (22), and the second rotating bracket (57) rotates in a vertical plane. The second rotating bracket (57) is provided with a fourth magnetic block (56), and the fourth magnetic block (56) has the fourth magnetic pole.

10. The food preparation utensil according to claim 9, characterized in that The fourth magnetic block (56) is arranged at the first end of the second rotating bracket (57), and the pivot (571) of the second rotating bracket (57) is arranged between the first end and the second end of the second rotating bracket (57). The driving mechanism also includes a second solenoid valve (58), and the driving rod (581) of the second solenoid valve (58) cooperates with the second end of the second rotating bracket (57) to enable the second rotating bracket (57) to rotate in a vertical plane.

11. The food preparation utensil according to claim 10, characterized in that The driving mechanism also includes a push rod structure (59), which is arranged on the driving rod (581), and the push rod structure (59) has a mating surface that cooperates with the second rotating bracket (57), and the mating surface includes a first mating surface (591), a second mating surface (592), and a mating inclined surface (593) connecting the first mating surface (591) and the second mating surface (592), and the distance between the mating inclined surface (593) and the lining (22) gradually increases in the direction away from the second solenoid valve (58).

12. The food preparation utensil according to claim 11, characterized in that The second end of the second rotating bracket (57) is provided with a guiding inclined surface (573) that matches the matching surface.

13. The food preparation utensil according to claim 11, characterized in that A limiting portion (572) is provided at the second end of the second rotating bracket (57), and two sides of the push rod structure (59) cooperate with the limiting portion (572) to enable the push rod structure (59) to move along a predetermined direction.

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