A controlled atmosphere preservation device for vegetables

Abstract

The present invention discloses a controlled atmosphere preservation device for vegetables, which relates to the field of controlled atmosphere packaging technology, including a gas replacement mechanism, wherein the gas replacement mechanism includes a mounting plate, and two gas grooves are provided on the top of the mounting plate, and the two gas grooves are respectively connected to an air inlet pipe and an exhaust pipe; the present invention installs a vegetable sealing and sorting mechanism, which absorbs water from the top of the absorbent cotton during its movement, thereby preventing water droplets on the surface of the vegetables from falling on the top of the vegetable box, thereby affecting the connection between the film and the vegetable box; during the movement of the elastic telescopic plate, the vegetables are pushed from the edge of the vegetable box, so that the vegetables on the edge move inward, preventing the vegetable leaves from being located at the connection position between the vegetable box and the film, so as not to affect the connection between the film and the vegetable box; in addition, the mechanism cooperates with the film limiting mechanism to limit the top of the vegetable, thereby preventing the sorted vegetables from returning to the top of the edge of the vegetable box after the elastic telescopic plate is removed, thereby affecting the connection between the film and the vegetable box.

Description

Technical Field

[0001] The present invention relates to the technical field of modified atmosphere packaging, in particular to a modified atmosphere preservation device for vegetables. Background Art

[0002] Currently, in areas such as food, fresh-keeping packaging has evolved from vacuum packaging to modified atmosphere packaging (MAP), which replaces the air inside the food packaging box with other inert gases. MAP offers many advantages over traditional vacuum packaging, significantly extending the shelf life of vegetables. However, current MA packaging machines for vegetables still have some shortcomings that require improvement. For example, if moisture from the vegetables settles at the junction between the box and the film, it can affect the seal during heat sealing. Furthermore, if the edges of vegetable leaves protrude from the junction between the box and the film, they can interfere with the heat sealing process, causing partial sealing of the vegetables, wasting gas and affecting packaging efficiency. Summary of the Invention

[0003] The present invention provides a controlled atmosphere preservation device for vegetables to solve the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A controlled atmosphere preservation device for vegetables, comprising a gas replacement mechanism, the gas replacement mechanism comprising a mounting plate, the top of the mounting plate being provided with two gas grooves, the two gas grooves being connected to an air inlet pipe and an exhaust pipe respectively;

[0006] Also includes:

[0007] a film limiting mechanism, which is installed on the top of the gas replacement mechanism and includes a film limiting frame, on which a plurality of suction nozzles are installed;

[0008] A sealing and cutting mechanism, which is connected to the film limiting mechanism and includes a heater and a cutter;

[0009] The vegetable sealing and sorting mechanism is installed on the top of the sealing and cutting mechanism, and includes multiple groups of elastic telescopic plates. The top of each group of elastic telescopic plates is rotatably connected to a rotating shaft. The bottom of each group of elastic telescopic plates is fixed with absorbent cotton. An L-shaped plate is fixed to one side of the elastic telescopic plate. A push rod motor is fixed to one side of the L-shaped plate. Two suction nozzles are fixed on both sides of the L-shaped plate.

[0010] The driving mechanism is connected with the film limiting mechanism and the vegetable sealing and sorting mechanism.

[0011] Furthermore, the gas replacement mechanism further includes a base, a support frame is fixed to one side of the base, a push rod motor 1 is fixed to the top of the base, and an output end of the push rod motor 1 is fixedly connected to the bottom of the mounting plate;

[0012] The top of the mounting plate is provided with a box groove, the bottom of the box groove is provided with a plurality of openings, the interior of the opening is provided with a support rod, the support rod is fixed to the top of the base, an air pipe is fixed inside the support rod, the tops of the plurality of support rods are fixed with a supporting plate, the interior of the supporting plate is provided with a plurality of suction nozzles three, the suction nozzles three are connected to the air pipe, and a vegetable box is provided on the top of the supporting plate;

[0013] A sealing strip is fixed on the top of the mounting plate.

[0014] Furthermore, the film limiting mechanism further includes a fixed plate 1, and the two sides of the fixed plate 1 are rotatably connected to an electric winding drum and a discharge drum, and the outside of the electric winding drum and the discharge drum are wound with a film, and the film is located at the bottom of the film limiting frame;

[0015] A plurality of connecting rods are fixed on the top of the film limiting frame, and the connecting rods are fixedly connected to the bottom of the fixing plate 1;

[0016] A movable frame is fixed on the top of the fixed plate, a reciprocating screw is provided on the internal threaded sleeve of the movable frame, a one-way gear is installed on the top of the reciprocating screw, the top of the reciprocating screw is rotatably connected to the support frame, and two guide rods are fixed on the top of the support frame, and a set of guide rods is arranged inside the support frame.

[0017] Furthermore, the sealing and cutting mechanism further includes a push rod motor 3 fixed inside the fixed plate 1, the output end of the push rod motor 3 is fixed to the fixed plate 2, the bottom of the fixed plate 2 is fixed with a plurality of mounting posts, the bottom ends of the mounting posts are fixed with springs, and the bottom ends of the plurality of springs are fixedly connected to the heater;

[0018] The cutter sleeve is arranged on the outside of the heater, and a connecting plate is fixed on the top of the cutter, and the connecting plate is fixedly connected to the second fixing plate.

[0019] Furthermore, the vegetable sealing and sorting mechanism also includes a reciprocating screw rod rotatably connected to the top of the support frame, a one-way gear rod 2 is installed on the top of the reciprocating screw rod 2, the external thread sleeve of the reciprocating screw rod 2 is provided with a square frame, a guide rod rod 2 is fixed on the top of the support frame, the guide rod rod 2 is sleeved inside the square frame, and a plurality of push rod motors 2 are fixed inside the square frame;

[0020] The bottom of each group of elastic expansion plates is provided with a water receiving trough, and the water receiving trough is fixed to the bottom of the frame;

[0021] The driving mechanism includes a motor fixed on the top of the support frame, and a gear is fixed to the output end of the motor. One side of the gear is engaged with the one-way gear 1, and the other side is engaged with the one-way gear 2.

[0022] Furthermore, a controller is fixed on one side of the base, and the controller is electrically connected to the motor, push rod motor 1, push rod motor 2, push rod motor 3, suction nozzle 1, suction nozzle 2 and suction nozzle 3 respectively;

[0023] The suction nozzle 1, the suction nozzle 2 and the suction nozzle 3 are externally connected to an exhaust device.

[0024] Compared with the existing technology, the beneficial effects of the present invention are:

[0025] 1. The present invention installs a vegetable sealing and sorting mechanism to absorb water from the top of the absorbent cotton during its movement, thereby preventing water droplets on the surface of the vegetables from dripping on the top of the vegetable box, thereby affecting the connection between the film and the vegetable box; during the movement of the elastic telescopic plate, the vegetables are pushed from the edge of the vegetable box to move inward, preventing vegetable leaves from being located at the connection position between the vegetable box and the film, thereby avoiding affecting the connection between the film and the vegetable box; in addition, the mechanism cooperates with the film limiting mechanism to limit the top of the vegetables, thereby preventing the sorted vegetables from returning to the top of the edge of the vegetable box after the elastic telescopic plate is removed, thereby affecting the connection between the film and the vegetable box.

[0026] 2. The present invention effectively prevents the vegetables in the vegetable box from exceeding the top of the box and exerting a thrust on the middle of the film through the synergistic effect of the film limiting mechanism and the vegetable sealing and sorting mechanism, thereby avoiding the bulge of the middle of the film. The bulge will cause the edge of the film to shrink inward, affecting the packaging effect. In addition, the second suction nozzle pulls the film to keep the film in a tensioned state, applying appropriate pressure to the vegetables to further prevent the vegetables from causing the film to bulge. The film is sealed when the middle part of the film is bulging. If the vegetables collapse over time, the film will also collapse, which will affect the aesthetics of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a first-perspective structural schematic diagram of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0028] Figure 2 This is a second perspective structural schematic diagram of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0029] Figure 3 This is a third-perspective structural schematic diagram of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0030] Figure 4 This is a schematic structural diagram from the first perspective of an explosion of a gas replacement mechanism of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0031] Figure 5 This is a schematic structural diagram from a second perspective of an explosion of a gas replacement mechanism of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0032] Figure 6 This is a structural schematic diagram of a film limiting mechanism of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0033] Figure 7 This is a structural schematic diagram of the sealing and cutting mechanism of a controlled atmosphere preservation device for vegetables proposed by the present invention.

[0034] Figure 8 This is a structural schematic diagram of the vegetable sealing and sorting mechanism of the controlled atmosphere preservation equipment for vegetables proposed by the present invention.

[0035] Figure 9 This is a first-perspective structural schematic diagram of the elastic telescopic plate of the controlled atmosphere preservation equipment for vegetables proposed by the present invention.

[0036] Figure 10 This is a schematic structural diagram from a second perspective of the elastic telescopic plate of the controlled atmosphere preservation equipment for vegetables proposed by the present invention.

[0037] In the figure: 1. Gas displacement mechanism; 11. Base; 12. Push rod motor 1; 13. Mounting plate; 14. Gas tank; 15. Inlet pipe; 16. Exhaust pipe; 17. Box slot; 18. Opening; 19. Support rod; 110. Air pipe; 111. Support plate; 112. Vegetable box; 113. Sealing strip; 114. Support frame; 2. Film limiting mechanism; 21. Reciprocating screw 1; 22. One-way gear 1; 23. Moving frame; 24. Guide rod 1; 25. Fixed plate 1; 26. Discharging drum; 27. Electric reel; 28. Connecting rod; 29. Film limiting frame; 210, suction nozzle one; 3, sealing and cutting mechanism; 31, push rod motor three; 32, fixing plate two; 33, mounting column; 34, spring; 35, heater; 36, connecting plate; 37, cutter; 4, vegetable sealing and sorting mechanism; 41, reciprocating screw two; 42, one-way gear two; 43, guide rod two; 44, frame; 45, push rod motor two; 46, L-shaped plate; 47, elastic telescopic plate; 48, rotating shaft; 49, absorbent cotton; 410, suction nozzle two; 411, water receiving trough; 5, driving mechanism; 51, motor; 52, gear. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0041] Example: Refer to Figures 1-10 A controlled atmosphere preservation device for vegetables, comprising a gas replacement mechanism 1, the gas replacement mechanism 1 comprising a mounting plate 13, the top of the mounting plate 13 is provided with two gas grooves 14, the two gas grooves 14 are respectively connected to an air inlet pipe 15 and an exhaust pipe 16;

[0042] Also includes:

[0043] The film limiting mechanism 2 is installed on the top of the gas replacement mechanism 1, including a film limiting frame 29, on which a plurality of suction nozzles 210 are installed;

[0044] The sealing and cutting mechanism 3 is connected to the film limiting mechanism 2 and includes a heater 35 and a cutter 37;

[0045] The vegetable sealing and sorting mechanism 4 is mounted on top of the sealing and cutting mechanism 3 and includes multiple sets of elastic telescopic plates 47. The top of each set of elastic telescopic plates 47 is rotatably connected to a rotating shaft 48. The bottom of each set of elastic telescopic plates 47 is fixed with absorbent cotton 49. An L-shaped plate 46 is fixed to one side of the elastic telescopic plate 47. A push rod motor 45 is fixed to one side of the L-shaped plate 46. Suction nozzles 410 are fixed to both sides of the L-shaped plate 46.

[0046] The driving mechanism 5 is connected to the film limiting mechanism 2 and the vegetable sealing and sorting mechanism 4.

[0047] The gas displacement mechanism 1 further includes a base 11, a support frame 114 is fixed to one side of the base 11, a push rod motor 12 is fixed to the top of the base 11, and the output end of the push rod motor 12 is fixedly connected to the bottom of the mounting plate 13;

[0048] A box groove 17 is formed on the top of the mounting plate 13, and a plurality of openings 18 are formed on the bottom of the box groove 17. A support rod 19 is sleeved inside the opening 18. The support rod 19 is fixed to the top of the base 11. An air pipe 110 is fixed inside the support rod 19. A supporting plate 111 is fixed to the top of the plurality of support rods 19. A plurality of suction nozzles 3 are fixed inside the supporting plate 111. The suction nozzles 3 are connected to the air pipe 110. A vegetable box 112 is provided on the top of the supporting plate 111.

[0049] A sealing strip 113 is fixed to the top of the mounting plate 13 .

[0050] The film limiting mechanism 2 also includes a fixed plate 25, and the two sides of the fixed plate 25 are rotatably connected to the electric winding drum 27 and the discharge drum 26. The outer parts of the electric winding drum 27 and the discharge drum 26 are wrapped with film, and the film is located at the bottom of the film limiting frame 29;

[0051] A plurality of connecting rods 28 are fixed to the top of the film limiting frame 29, and the connecting rods 28 are fixedly connected to the bottom of the fixing plate 1 25;

[0052] A movable frame 23 is fixed to the top of the fixed plate 25, and a reciprocating screw 21 is sleeved on the internal thread of the movable frame 23. A one-way gear 22 is installed on the top of the reciprocating screw 21. The top of the reciprocating screw 21 is rotatably connected to the support frame 114. Two guide rods 24 are fixed to the top of the support frame 114, and the guide rods 24 are sleeved inside the support frame 114.

[0053] The sealing and cutting mechanism 3 further includes a push rod motor 31 fixed inside the fixed plate 1 25. The output end of the push rod motor 31 is fixed to the fixed plate 2 32. The bottom of the fixed plate 2 32 is fixed with multiple mounting posts 33. The bottom ends of the mounting posts 33 are fixed with springs 34. The bottom ends of the multiple springs 34 are fixedly connected to the heater 35.

[0054] The cutter 37 is sleeved on the outside of the heater 35 , and a connecting plate 36 is fixed to the top of the cutter 37 , and the connecting plate 36 is fixedly connected to the second fixing plate 32 .

[0055] The vegetable sealing and sorting mechanism 4 also includes a reciprocating screw 41 rotatably connected to the top of the support frame 114. A one-way gear 42 is installed on the top of the reciprocating screw 41. The external thread of the reciprocating screw 41 is provided with a square frame 44. A guide rod 43 is fixed to the top of the support frame 114. The guide rod 43 is sleeved inside the square frame 44. A plurality of push rod motors 45 are fixed inside the box 44.

[0056] The bottom of each set of elastic expansion plates 47 is provided with a water receiving trough 411, which is fixed to the bottom of the frame 44;

[0057] Each set of elastic expansion plates 47 is composed of a plurality of plates with openings 18 facing upwards, and a spring is provided between each plate.

[0058] The driving mechanism 5 includes a motor 51 fixed to the top of the support frame 114 , and a gear 52 is fixed to the output end of the motor 51 . One side of the gear 52 is engaged with the one-way gear 1 22 , and the other side is engaged with the one-way gear 2 42 .

[0059] A controller is fixed to one side of the base 11, and the controller is electrically connected to the motor 51, push rod motor 1 12, push rod motor 2 45, push rod motor 3 31, suction nozzle 1 210, suction nozzle 2 410 and suction nozzle 3 respectively;

[0060] Suction nozzle 1 210 , suction nozzle 2 410 and suction nozzle 3 are externally connected to an exhaust device.

[0061] Working principle:

[0062] Open the suction nozzle 3 to suck the bottom of the vegetable box 112 to prevent the vegetable box 112 from being unable to fit into the box groove 17 due to position deviation when the mounting plate 13 moves upward, causing the vegetable box 112 to tilt. Start the push rod motor 12 to move the mounting plate 13 upward so that the vegetable box 112 is inserted into the box groove 17. The vegetable box 112 contacts the sealing strip 113. The suction nozzle 3 pulls the vegetable box 112 into close contact with the sealing strip 113 to prevent air leakage during gas replacement.

[0063] The starting motor 51 drives the gear 52 to rotate in the reverse direction. The reverse rotation of the gear 52 satisfies the direction in which the one-way gear 2 42 drives the reciprocating screw 2 41 to rotate. The reciprocating screw 2 41 rotates to move the frame 44 downward, so that the top of the vegetable box 112 is flush with the bottom of the absorbent cotton 49. The motor 51 is turned off and the push rod motor 2 45 is started to push the elastic telescopic plate 47 close to the vegetable box 112, moving from the top outer wall edge of the vegetable box 112 to the inner wall edge. The absorbent cotton 49 absorbs water from the top during its movement to prevent water on the surface of the vegetables from falling on the top of the vegetable box 112 and affecting the connection between the film and the vegetable box 112.

[0064] During the movement of the elastic expansion plate 47, the vegetables are pushed from the edge of the vegetable box 112, pushing the vegetables inward to prevent the vegetable leaves from being located at the connection position between the vegetable box 112 and the film, thereby affecting the connection between the film and the vegetable box 112, and turning off the push rod motor 2 45;

[0065] The motor 51 is started to drive the gear 52 to rotate forward. The forward rotation of the gear 52 satisfies the direction of rotation of the one-way gear 1 22 to drive the reciprocating screw 1 21 to rotate, so that the mobile frame 23 pushes the film limiting mechanism 2 and the sealing and cutting mechanism 3 below the mobile frame 23 to move downward. Before moving downward, the suction nozzle 1 210 is started to suck the top of the film to limit it, so as to prevent the vegetables in the vegetable box 112 from pushing the middle of the film when it exceeds the top of the vegetable box 112, causing the middle of the film to bulge, which will cause the edge to shrink inward. When the middle of the film bulges, it is sealed. If the vegetables collapse due to time problems, the film will also collapse, affecting the aesthetics of the film sealing.

[0066] When the bottom of the film contacts the rotating shaft 48, the film limits the top of the vegetables in the vegetable box 112, and the motor 51 is started to reverse, so that the box 44 drives the push rod motor 2 45 to move downward, and the push rod motor 2 45 presses the elastic expansion plate 47 through the L-shaped plate 46 to shrink, and then the motor 51 is started to rotate forward, so that the film continues to move downward to further limit the top of the vegetables. According to the above steps, when the elastic expansion plate 47 can no longer shrink, the push rod motor 2 45 pulls the elastic expansion plate 47 back. During the movement, the rotating shaft 48 reduces the friction between the film and the film. When the elastic expansion plate 47 shrinks, the film limits the top of the vegetables to prevent the vegetables arranged after the elastic expansion plate 47 is removed from returning to the top of the edge of the vegetable box 112, affecting the connection between the film and the vegetable box 112;

[0067] When the suction nozzle 2 410 moves to the bottom of the suction nozzle 1 210, the suction nozzle 2 410 is started, the suction nozzle 1 210 is closed, and then the movement is continued. The suction nozzle 2 410 pulls the film to make the film taut. After the film is taut, the vegetables can be further prevented from causing the film to bulge. Then the motor 51 drives the gear 52 to rotate forward, so that the film continues to move down and contact the top of the mounting plate 13. After contact, the film limit frame 29 applies pressure to it, and the film covers the top of the mounting plate 13. Then the air inlet pipe 15 is started to supply fresh-keeping gas, and the exhaust pipe 16 is opened to allow the fresh-keeping gas to enter. The vegetable box 112 is filled with a liquid and the gas is replaced. Then, the push rod motor 31 is started to push the fixing plate 2 32, the mounting column 33, the spring 34, the heater 35 and the cutter 37 downward. The heater 35 presses the film so that the film contacts the top of the vegetable box 112. The heater 35 is started to heat the film so that it is connected to the top of the vegetable box 112 and the top of the vegetable box 112 is sealed. If the heater 35 continues to move downward and cannot move, the spring 34 is compressed, and the cutter 37 can continue to move downward. After the cutter 37 contacts the film, the film is cut.

[0068] The second suction nozzle 410 is closed, and the second push rod motor 45 continues to pull the elastic expansion plate 47 to return to its original position. One side of the absorbent cotton 49 contacts the top of the water receiving trough 411. If the absorbent cotton 49 continues to move, it will be strongly compressed. After being strongly compressed, the absorbent cotton 49 discharges the absorbed liquid into the interior of the water receiving trough 411.

[0069] Then after each structure is reset, the vegetable box 112 is removed to complete the packaging.

[0070] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A controlled atmosphere preservation device for vegetables, comprising a gas replacement mechanism (1), characterized in that: The gas replacement mechanism (1) comprises a mounting plate (13), the top of the mounting plate (13) is provided with two gas grooves (14), and the two gas grooves (14) are respectively connected to an air inlet pipe (15) and an exhaust pipe (16); Also includes: A film limiting mechanism (2) is mounted on the top of the gas displacement mechanism (1), comprising a film limiting frame (29), wherein a plurality of suction nozzles (210) are mounted on the film limiting frame (29); A sealing and cutting mechanism (3), which is connected to the film limiting mechanism (2) and includes a heater (35) and a cutter (37); A vegetable sealing and sorting mechanism (4) is mounted on the top of the sealing and cutting mechanism (3), comprising a plurality of groups of elastic telescopic plates (47), the top of each group of the elastic telescopic plates (47) being rotatably connected to a rotating shaft (48), the bottom of each group of the elastic telescopic plates (47) being fixed with absorbent cotton (49), an L-shaped plate (46) being fixed on one side of the elastic telescopic plates (47), a second push rod motor (45) being fixed on one side of the L-shaped plate (46), and two suction nozzles (410) being fixed on both sides of the L-shaped plate (46); A driving mechanism (5) connected to the film limiting mechanism (2) and the vegetable sealing and sorting mechanism (4); The gas replacement mechanism (1) further comprises a base (11), and a support frame (114) is fixed to one side of the base (11); The film limiting mechanism (2) further comprises a fixed plate (25), the two sides of which are rotatably connected to an electric winding drum (27) and a discharge drum (26), respectively, and the outsides of the electric winding drum (27) and the discharge drum (26) are wound with a film, and the film is located at the bottom of the film limiting frame (29); A plurality of connecting rods (28) are fixed to the top of the film limiting frame (29), and the connecting rods (28) are fixedly connected to the bottom of the fixing plate (25); A movable frame (23) is fixed on the top of the fixed plate (25), a reciprocating screw (21) is sleeved on the internal thread of the movable frame (23), a one-way gear (22) is installed on the top of the reciprocating screw (21), the top of the reciprocating screw (21) is rotatably connected to the support frame (114), two guide rods (24) are fixed on the top of the support frame (114), and the guide rods (24) are sleeved inside the support frame (114); The vegetable sealing and sorting mechanism (4) further comprises a reciprocating screw rod (41) rotatably connected to the top of the support frame (114), a one-way gear (42) is externally mounted on the top of the reciprocating screw rod (41), a square frame (44) is provided on the external thread sleeve of the reciprocating screw rod (41), a guide rod (43) is fixed to the top of the support frame (114), the guide rod (43) is sleeved inside the square frame (44), and a plurality of push rod motors (45) are fixed inside the square frame (44); A water receiving trough (411) is provided at the bottom of each group of elastic expansion plates (47), and the water receiving trough (411) is fixed to the bottom of the frame (44); The driving mechanism (5) includes a motor (51) fixed on the top of the support frame (114), and a gear (52) is fixed to the output end of the motor (51), one side of the gear (52) is meshed with the one-way gear 1 (22), and the other side is meshed with the one-way gear 2 (42).

2. A vegetable controlled atmosphere preservation device according to claim 1, characterized in that: A push rod motor 1 (12) is fixed on the top of the base (11), and the output end of the push rod motor 1 (12) is fixedly connected to the bottom of the mounting plate (13); The top of the mounting plate (13) is provided with a box groove (17), the bottom of the box groove (17) is provided with a plurality of openings (18), the interior of the opening (18) is provided with a support rod (19), the support rod (19) is fixed to the top of the base (11), the interior of the support rod (19) is provided with an air pipe (110), the top ends of the plurality of support rods (19) are provided with a supporting plate (111), the interior of the supporting plate (111) is provided with a plurality of suction nozzles (3), the suction nozzles (3) are communicated with the air pipe (110), and the top of the supporting plate (111) is provided with a vegetable box (112); A sealing strip (113) is fixed to the top of the mounting plate (13).

3. A vegetable controlled atmosphere preservation device according to claim 2, characterized in that: The sealing and cutting mechanism (3) further comprises a push rod motor (31) fixed inside the fixed plate (25), the output end of the push rod motor (31) is fixed with the fixed plate (32), the bottom of the fixed plate (32) is fixed with a plurality of mounting posts (33), the bottom ends of the mounting posts (33) are fixed with springs (34), and the bottom ends of the plurality of springs (34) are fixedly connected to the heater (35); The cutter (37) is sleeved on the outside of the heater (35), and a connecting plate (36) is fixed on the top of the cutter (37), and the connecting plate (36) is fixedly connected to the second fixing plate (32).

4. A vegetable controlled atmosphere preservation device according to claim 3, characterized in that: A controller is fixed on one side of the base (11), and the controller is electrically connected to the motor (51), push rod motor 1 (12), push rod motor 2 (45), push rod motor 3 (31), suction nozzle 1 (210), suction nozzle 2 (410) and suction nozzle 3 respectively; The suction nozzle 1 (210), the suction nozzle 2 (410) and the suction nozzle 3 are externally connected to an exhaust device.

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