Nitrogen-filling skin vacuum packaging integrated equipment for food

Abstract

The invention relates to the related technical field of food nitrogen filling, and discloses food nitrogen filling skin vacuum packaging integrated equipment which comprises a liquid nitrogen storage tank used for storing liquid nitrogen and cooperatively working with a pressure sensing assembly, and the injection amount of the liquid nitrogen is accurately controlled through pressure regulation and control; the pressure sensing assembly detects the pressure change condition of the nitrogen spraying and film covering device in the film covering process in real time, pressure detection data are detected in real time, and on one hand, the pressure sensing assembly is connected to the fluid pressurizing assembly; the pressure sensing assembly detects the pressure change condition of the nitrogen spraying and film covering device in the film covering process in real time, when food of different sizes is placed, the space change in the vacuumizing box assembly can cause pressure change, and the pressure sensing assembly feeds back the real-time pressure detection data to the liquid nitrogen storage tank. The liquid nitrogen storage tank accurately controls the injection amount of liquid nitrogen through pressure regulation and control according to pressure changes.

Description

Technical Field

[0001] The present invention belongs to the technical field related to food nitrogen filling, and more specifically, relates to an integrated device for food nitrogen filling body-fitting vacuum packaging. Background Art

[0002] In the fiercely competitive food market, product appearance is crucial. Skin packaging can closely fit the shape of food, clearly displaying the appearance and details of the food, allowing consumers to intuitively see the quality and form of the food, thereby attracting consumers' attention and improving the product's appeal and competitiveness. However, existing technologies for nitrogen-filled food have the following drawbacks: In existing technologies, the control of nitrogen injection volume is not precise enough. For foods of different sizes, it is impossible to precisely inject liquid nitrogen in a quantitative manner according to their actual needs. This can result in excessive nitrogen injection, resulting in waste, or insufficient nitrogen injection, affecting the packaging effect and failing to provide a good protective atmosphere for the food, thereby affecting the shelf life and quality of the food. In existing technologies, traditional food packaging often struggles to apply uniform and appropriate pressure to food during the laminating process, leading to problems such as loose lamination and poor adhesion. Furthermore, the lack of an effective pressure regulation mechanism prevents flexible adjustments based on the characteristics and packaging requirements of different foods. In the prior art, in existing food nitrogen filling packaging equipment, the design of the nitrogen spray device is often not reasonable enough, and the nitrogen spray angle and range are difficult to accurately control, resulting in uneven nitrogen distribution, which affects the packaging effect.

[0003] Therefore, in view of this, the existing structure and defects are studied and improved, and an integrated equipment for food nitrogen-filled body-fitting vacuum packaging is provided, in order to achieve a more practical and valuable purpose. Summary of the Invention

[0004] The present invention provides an integrated device for nitrogen-filled body-fitting vacuum packaging of food, which is used to overcome the above-mentioned defects in the prior art.

[0005] The purpose and efficacy of the integrated equipment for nitrogen-filled body-fitting vacuum packaging of food of the present invention are achieved by the following specific technical means: An integrated device for nitrogen-filled body-fitting vacuum packaging of food, comprising a nitrogen-filling chassis, an evacuation box assembly for evacuating and laminating food mounted on the nitrogen-filling chassis, a nitrogen spray laminating device slidably mounted above the evacuation box assembly, the nitrogen spray laminating device cooperating with the evacuation box assembly to form a sealed cavity; The nitrogen spray coating device is provided with a liquid nitrogen storage tank, a pressure sensing component and a fluid pressurizing component in sequence from top to bottom; The liquid nitrogen storage tank is used to store liquid nitrogen and works in conjunction with the pressure sensing component to accurately control the injection amount of liquid nitrogen through pressure regulation. The pressure sensing component detects the pressure changes of the nitrogen spray coating device during the coating process in real time. The real-time pressure monitoring data is connected to the fluid pressurizing component on the one hand and the liquid nitrogen storage tank on the other hand, thereby achieving precise control of the entire packaging process; The fluid pressurizing component contains fluid. When working, the fluid is pumped by negative pressure, and the pressure generated by the fluid is used to pressurize and coat the food. The pressure changes generated by the fluid flow will drive the corresponding mechanical structure, thereby adjusting the liquid nitrogen displacement of the liquid nitrogen storage tank, thereby achieving precise control of the liquid nitrogen injection amount.

[0006] A further technical solution is that the liquid nitrogen storage tank includes a cover body, a liquid nitrogen storage box is provided inside the cover body, a liquid nitrogen chamber is provided in the liquid nitrogen storage box, a piston extrusion assembly is installed in the liquid nitrogen chamber, and the piston extrusion assembly includes two vertical groove plates, a first piston plate is slidably installed between the two vertical groove plates, a guide rod is fixedly connected to the outer side of the first piston plate, and the end of the guide rod is connected to the pressure sensing assembly.

[0007] A further technical solution is that the pressure sensing assembly includes a middle shell, a pressure stabilizing chamber is provided in the middle shell, side sliding grooves are fixedly installed on the inner walls on both sides of the pressure stabilizing chamber, a dynamic pressure sensing assembly is slidably provided in the side sliding grooves, a reset spring is connected between the dynamic pressure sensing assembly and the bottom of the cover body, the dynamic pressure sensing assembly includes a second piston plate, second sliders are fixedly installed at both ends of the second piston plate, the second sliders provided at both ends slide in the side sliding grooves, and the second piston plate is fixedly connected to the lower end of the guide rod.

[0008] A further technical solution is that the fluid pressurizing component includes a flexible fluid sac, which is made of silicone rubber and filled with edible-grade gelatin. The upper plane of the flexible fluid sac is connected to the pressure-stabilizing chamber. During the pressurized lamination operation, the flexible fluid sac will adhere to the surface of the object due to its own flexibility and generate an extrusion force. The extrusion force will be transmitted to the piston extrusion component through the dynamic pressure sensing component to realize pressure injection of nitrogen.

[0009] A further technical solution is that a sealing frame is fixedly installed on the outside of the flexible fluid bag, and a liquid spray device is fixedly installed on the four inner corners of the sealing frame. The liquid spray device has a lower spray position device and an upper spray position device that use friction to achieve the liquid nitrogen spray angle, and the lower spray position device has the same structure as the upper spray position device.

[0010] A further technical solution is that the liquid spraying device includes an end row pipe, the end row pipe is connected to the nitrogen exhaust pipe to form a liquid spraying chamber, the lower end of the end row pipe is fixedly connected to a film breaking head, the lower spray position device includes an arc groove, the arc groove is arranged on the side wall of the end row pipe, the side wall of the end row pipe is provided with a central rotating shaft, the surface of the central rotating shaft is rotatably provided with a rotating wheel and a belt, and the belt is arranged on the outside of the rotating wheel.

[0011] A further technical solution is that a nitrogen spray assembly is provided on the side of the end pipe close to the flexible fluid bag, and the nitrogen spray assembly includes a nozzle, and the upper and lower side walls of the nozzle are provided with limit shafts, and the limit shafts of the upper and lower side walls are rotatably installed with upper and lower swing pieces, and a direct spray nozzle is fixedly installed between the limit shaft and the lower swing piece, and the limit shaft is connected to the belt.

[0012] A further technical solution is that the evacuation box assembly includes an evacuation box body, a partition for placing items is placed inside the evacuation box body, a lower partition and an upper partition are provided inside the nitrogen filling chassis, the lower partition is connected to the inner wall of the nitrogen filling chassis to form an equipment device cavity, a PSA nitrogen generator and a vacuum pump are installed inside the equipment device cavity, the PSA nitrogen generator is arranged on the right side of the vacuum pump, the output end of the PSA nitrogen generator is fixedly connected to a nitrogen making pipe, the nitrogen making pipe is communicated with the interior of the liquid nitrogen chamber, the output end of the vacuum pump is provided with a vacuum exhaust pipe, and the vacuum exhaust pipe is communicated with the interior of the evacuation box body.

[0013] A further technical solution is that a first slider is provided on the outer side of the cover body, and a lifting backplane assembly is also fixedly installed on the desktop of the nitrogen charging chassis, the lifting backplane assembly includes a mounting backplane, an inner slide groove is provided on the front side of the mounting backplane, and the first slider slides in the inner slide groove; the upper partition is connected to the inner wall of the nitrogen charging chassis to form an upper box body, and a double-headed telescopic motor is installed in the upper box body, and the output end of the double-headed telescopic motor is connected to the first slider.

[0014] According to a further technical solution, an external bracket is fixedly connected to the outer side of the desktop of the nitrogen filling chassis, a film is installed on the external bracket, and a control button is installed on the outer side of the nitrogen filling chassis.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides integrated nitrogen-filled, body-fitting vacuum packaging equipment for food. The device is equipped with a liquid nitrogen storage tank and a pressure sensing assembly. The pressure sensing assembly monitors pressure changes during the film coating process. When different sized foods are placed inside the vacuum box, changes in the space within the vacuum box result in pressure changes. The pressure sensing assembly then feeds this real-time pressure detection data back to the liquid nitrogen storage tank. The liquid nitrogen storage tank precisely controls the amount of liquid nitrogen sprayed based on pressure changes, ensuring that the appropriate amount of liquid nitrogen is accurately sprayed into the package regardless of food size, achieving quantitative spraying.

[0016] The integrated nitrogen-filled, body-fitting vacuum packaging equipment for food disclosed herein utilizes a fluid pressurizing assembly. Pressure changes generated by fluid flow drive a corresponding mechanical structure, thereby regulating the liquid nitrogen displacement from the liquid nitrogen storage tank. When packaging foods of varying sizes or shapes, changes in fluid pressure prompt the liquid nitrogen storage tank to precisely spray liquid nitrogen based on actual conditions, achieving quantitative spraying to meet the needs of diverse food packaging. The equipment works in conjunction with a pressure sensing assembly, which detects pressure changes during the lamination process. The fluid pressurizing assembly then makes corresponding adjustments based on these pressure changes, ensuring the stability and accuracy of the packaging process and improving packaging quality and efficiency.

[0017] The present invention provides an integrated device for nitrogen-filled body-fitting vacuum packaging of food. The device is provided with a nitrogen spraying component, a pressure sensing component and a fluid pressurizing component that work in conjunction with each other. The nitrogen spraying component can accurately control the amount of liquid nitrogen sprayed according to the size of the food and the packaging requirements. An appropriate amount of nitrogen can create a good inert gas environment, inhibit food oxidation, microbial growth and deterioration, and extend the shelf life of the food. The upper and lower side walls of the nozzle in the nitrogen spraying component are provided with a limiting shaft, on which an upper swing piece and a lower swing piece are rotatably mounted, and the limiting shaft is connected to a belt. This allows the upper swing piece and the lower swing piece to move during operation, and cooperate with the direct-shooting nozzle to achieve multi-angle liquid nitrogen spraying. For example, for irregularly shaped foods, multi-angle spraying can allow the nitrogen to cover the food more comprehensively, avoid dead corners that are not covered by nitrogen, and effectively discharge oxygen in the package. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] The present invention will be further described below with reference to the accompanying drawings and examples.

[0020] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the overall front view structure of the present invention; Figure 3 It is a schematic diagram of the overall top view of the structure of the present invention; Figure 4 It is a schematic diagram of the overall side sectional structure of the present invention; Figure 5 This is a schematic diagram of the appearance and structure of the nitrogen filling chassis and the evacuation box assembly of the present invention; Figure 6 Schematic diagram of the top cross-section structure of the nitrogen-filled chassis of the present invention; Figure 7 Schematic diagram of the overall appearance of the nitrogen spray coating device of the present invention; Figure 8 It is a schematic side cross-sectional view of the nitrogen spray coating device of the present invention; Figure 9 For the present invention Figure 8 A in the figure shows the enlarged structural diagram; Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure at point B in the middle.

[0021] Description of reference numerals: Nitrogen filling chassis 11, control button 12, external bracket 13, film 14, nitrogen spray coating device 15, vacuum box assembly 16, lifting back plate assembly 17, liquid nitrogen storage tank 18, fluid pressurization assembly 19, pressure sensing assembly 20, vacuum box body 21, item placement partition 22, lower partition 23, upper partition 24, equipment chamber 25, PSA nitrogen generator 26, vacuum pump 27, nitrogen production pipe 28, vacuum exhaust pipe 29, upper box body 30, double-head telescopic motor 31, mounting back plate 33, inner slide 34, cover body 35, first slider 36, middle shell 37, seal Sealing frame 38, flexible fluid sac 39, liquid spray device 40, liquid nitrogen storage box 41, liquid nitrogen chamber 42, first piston plate 43, guide rod 44, nitrogen exhaust pipe 45, pressure stabilizing chamber 46, side slide groove 47, second slider 48, second piston plate 49, return spring 50, membrane rupturing head 51, edible grade gelatin 52, end exhaust pipe 53, arc groove 54, central rotating shaft 55, rotating wheel 56, belt 57, lower spray position device 58, upper spray position device 59, liquid spray chamber 60, nozzle 61, limit shaft 62, upper swing plate 63, direct spray head 64, lower swing plate 65, nitrogen spray assembly 66. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0025] As attached Figure 1 To the attached Figure 10 As shown: The present invention provides an integrated device for nitrogen-filled body-fitting vacuum packaging of food, comprising a nitrogen-filling chassis 11, an evacuation box assembly 16 for evacuating and coating food mounted on the nitrogen-filling chassis 11, a nitrogen spray coating device 15 slidably mounted above the evacuation box assembly 16, the nitrogen spray coating device 15 cooperating with the evacuation box assembly 16 to form a sealed cavity; The nitrogen spray coating device 15 is provided with a liquid nitrogen storage tank 18, a pressure sensing component 20 and a fluid pressurizing component 19 in order from top to bottom; The liquid nitrogen storage tank 18 is used to store liquid nitrogen and works in conjunction with the pressure sensing component 20 to precisely control the injection amount of liquid nitrogen through pressure regulation. The pressure sensing component 20 detects the pressure changes of the nitrogen spray coating device 15 during the coating process in real time. The real-time pressure monitoring data is connected to the fluid pressurizing component 19 on the one hand and the liquid nitrogen storage tank 18 on the other hand, thereby achieving precise control of the entire packaging process; The fluid pressurizing component 19 is filled with fluid. When working, the fluid is pumped by negative pressure, and the pressure generated by the fluid is used to pressurize and coat the food. The pressure changes generated by the fluid flow will drive the corresponding mechanical structure, thereby adjusting the liquid nitrogen displacement of the liquid nitrogen storage tank 18, thereby achieving precise control of the liquid nitrogen injection amount.

[0026] Preferably, refer to the attached Figure 8The liquid nitrogen storage tank 18 includes a cover body 35, a liquid nitrogen storage box 41 is provided inside the cover body 35, a liquid nitrogen chamber 42 is provided in the liquid nitrogen storage box 41, a piston extrusion assembly is installed in the liquid nitrogen chamber 42, and the piston extrusion assembly includes two vertical groove plates, a first piston plate 43 is slidably installed between the two vertical groove plates, a guide rod 44 is fixedly connected to the outer side of the first piston plate 43, and the end of the guide rod 44 is connected to the pressure sensing assembly 20.

[0027] Preferably, refer to the attached Figure 8 The pressure sensing assembly 20 includes a middle shell 37, in which a pressure stabilizing chamber 46 is provided. Side slide grooves 47 are fixedly installed on the inner walls of both sides of the pressure stabilizing chamber 46. A dynamic pressure sensing assembly is slidably provided in the side slide grooves 47. A reset spring 50 is connected between the dynamic pressure sensing assembly and the bottom of the cover body 35. The dynamic pressure sensing assembly includes a second piston plate 49, and second sliders 48 are fixedly installed at both ends of the second piston plate 49. The second sliders 48 provided at both ends slide in the side slide grooves 47, and the second piston plate 49 is fixedly connected to the lower end of the guide rod 44.

[0028] Preferably, refer to the attached Figure 8 The fluid pressurizing component 19 includes a flexible fluid sac 39, which is made of silicone rubber and filled with edible-grade gelatin 52. The upper plane of the flexible fluid sac 39 is connected to the pressure-stabilizing chamber 46. During the pressurized laminating operation, the flexible fluid sac 39 will adhere to the surface of the object and generate an extrusion force due to its own flexibility. The extrusion force will be transmitted to the piston extrusion component through the dynamic pressure sensing component to realize pressure injection of nitrogen.

[0029] Preferably, refer to the attached Figure 7 and attached Figure 8 A sealing frame 38 is fixedly installed on the outside of the flexible fluid bag 39, and a liquid spraying device 40 is fixedly installed at the four inner corners of the sealing frame 38. The liquid spraying device 40 contains a lower spraying device 58 and an upper spraying device 59 that use friction to achieve the liquid nitrogen spraying angle. The lower spraying device 58 has the same structure as the upper spraying device 59.

[0030] Preferably, refer to the attached Figure 9 The liquid spraying device 40 includes an end pipe 53, which is connected to the nitrogen exhaust pipe 45 to form a liquid spraying chamber 60. The lower end of the end pipe 53 is fixedly connected to a film breaking head 51. The lower spraying device 58 includes an arc groove 54, which is arranged on the side wall of the end pipe 53. A central rotating shaft 55 is provided on the side wall of the end pipe 53. A rotating wheel 56 and a belt 57 are rotatably provided on the surface of the central rotating shaft 55. The belt 57 is arranged on the outside of the rotating wheel 56.

[0031] Preferably, refer to the attached Figure 10 A nitrogen spray assembly 66 is provided on the side of the end pipe 53 close to the flexible fluid bag 39. The nitrogen spray assembly 66 includes a nozzle 61. The upper and lower side walls of the nozzle 61 are both provided with a limit shaft 62. The limit shafts 62 on the upper and lower side walls are rotatably mounted with an upper swing piece 63 and a lower swing piece 65. A direct spray head 64 is fixedly mounted between the limit shaft 62 and the lower swing piece 65. The limit shaft 62 is connected to the belt 57.

[0032] Preferably, refer to the attached Figure 6 The evacuation box assembly 16 includes an evacuation box body 21, an article placement partition 22 is placed inside the evacuation box body 21, a lower partition 23 and an upper partition 24 are provided inside the nitrogen charging chassis 11, the lower partition 23 is connected to the inner wall of the nitrogen charging chassis 11 to form an equipment cavity 25, and a PSA nitrogen generator 26 and a vacuum pump 27 are installed inside the equipment cavity 25. The PSA nitrogen generator 26 is arranged on the right side of the vacuum pump 27, and the output end of the PSA nitrogen generator 26 is fixedly connected to a nitrogen generating pipe 28, and the nitrogen generating pipe 28 is communicated with the interior of the liquid nitrogen chamber 42. The output end of the vacuum pump 27 is provided with a vacuum exhaust pipe 29, and the vacuum exhaust pipe 29 is communicated with the interior of the evacuation box body 21.

[0033] Preferably, refer to the attached Figure 6 To the attached Figure 8 A first slider 36 is provided on the outer side of the cover 35. A lifting backplane assembly 17 is also fixedly installed on the desktop of the nitrogen filling chassis 11. The lifting backplane assembly 17 includes a mounting backplane 33. An inner slide groove 34 is provided on the front side of the mounting backplane 33. The first slider 36 slides in the inner slide groove 34. The upper partition 24 is connected to the inner wall of the nitrogen charging case 11 to form an upper box body 30 . A double-head telescopic motor 31 is installed in the upper box body 30 . The output end of the double-head telescopic motor 31 is connected to the first slider 36 .

[0034] Preferably, refer to the attached Figure 6 To the attached Figure 8 An external bracket 13 is fixedly connected to the outer side of the desktop of the nitrogen filling chassis 11 , a film 14 is installed on the external bracket 13 , and a control button 12 is installed on the outer side of the nitrogen filling chassis 11 .

[0035] Specific use of the present invention: First, the article placement partition 22 of the evacuated box assembly 16 must be disinfected. After the disinfection is completed, the food that needs to be skin-packed is placed on the surface of the article placement partition 22. Pressing the on / off button on control button 12 activates the device. At this point, the double-ended telescopic motor 31 within the upper housing 30 begins operating, driving the nitrogen spray coating device 15 downward. Once the nitrogen spray coating device 15 descends and contacts the evacuation box assembly 16, the two seal together, preparing for the subsequent evacuation, packaging, and bagging process. As the nitrogen spray coating device 15 descends, the four liquid spray devices 40 inside the sealing frame 38 are first activated to rupture the film. The rupture heads 51 at the front of the liquid spray devices 40 puncture the film, and the film then surrounds the outer surface of the liquid spray devices 40. As the nitrogen spray coating device 15 continues to descend, the lower spray device 58 and the upper spray device 59 on the side walls of the end pipe 53 come into contact with the film. As the film is pushed downward, the rotating discs 56 on the lower and upper spray devices 58 and 59 rotate. The rotating discs 56 drive the belt 57, which in turn rotates the limit shaft 62 on the nitrogen spray assembly 66. The rotation of the lower and upper spray devices 58 and 59 drives the upper and lower swing discs 63 and 65 toward each other, reducing the distance between them and transforming the spray range from a wide-angle spray to a linear atomization spray. When food encounters the wide-angle nitrogen jet, it uniformly contacts the food over a large area, quickly absorbing heat from the food surface, causing the food temperature to drop rapidly, freezing the moisture and solidifying it. Once the rotation is complete and the jet becomes straight, the liquid nitrogen spray stops. After the liquid sprayer 40 breaks through the membrane and descends, the flexible fluid bladder 39 in the fluid pressurizing assembly 19 comes into contact with the food. At this point, the edible-grade gelatin 52 deforms and bulges, transmitting the pressure within the flexible fluid bladder 39 to the pressure-stabilizing chamber 46 in the pressure sensing assembly 20. This chamber 46 pushes the second piston plate 49 upward, which in turn pushes the guide rod 44. This guide rod 44 drives the first piston plate 43 upward, squeezing the liquid nitrogen storage tank 41. The liquid nitrogen in the tank then flows through the nitrogen discharge pipe 45 into the liquid sprayer 40, achieving spray cooling. After the liquid spray device 40 breaks the film, the nitrogen spray coating device 15 and the evacuation box assembly 16 form a sealed space. Next, the vacuum pump 27 applies suction to this sealed space. Once suction is complete, the edible-grade gelatin 52 within the fluid pressurization assembly 19, under the negative pressure, simultaneously absorbs the food. The edible-grade gelatin 52 is completely adsorbed to the film surface, tightly adhering to the food surface. After pressurization, the food is more intact, and the packaging film adheres tightly to the food surface, creating a refined, neat appearance that highlights the shape and color of the food, enhancing the product's shelf appeal. After the vacuum is completed, the double-head telescopic motor 31 rises and the nitrogen spray coating device 15 returns to its initial state. At the same time, the PSA nitrogen generator 26 synchronously produces nitrogen and transports the nitrogen to the liquid nitrogen storage tank 18 for storage and standby.

[0036] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. An integrated device for nitrogen-filled body-fitting vacuum packaging of food, comprising a nitrogen-filled chassis (11), on which is mounted an evacuation box assembly (16) for evacuating and laminating food, characterized in that: A nitrogen spray coating device (15) is slidably mounted above the evacuation box assembly (16), and the nitrogen spray coating device (15) cooperates with the evacuation box assembly (16) to form a sealed cavity; The nitrogen spray coating device (15) is provided with a liquid nitrogen storage tank (18), a pressure sensing component (20) and a fluid pressurizing component (19) in order from top to bottom; The liquid nitrogen storage tank (18) is used to store liquid nitrogen and works in conjunction with the pressure sensing component (20) to accurately control the injection amount of liquid nitrogen through pressure regulation. The pressure sensing component (20) detects the pressure change of the nitrogen spray coating device (15) during the coating process in real time and monitors the pressure data in real time. The fluid pressurizing component (19) is filled with fluid. When in operation, the fluid is pumped by negative pressure, and the pressure generated by the fluid is used to pressurize and coat the food. The pressure change generated by the fluid flow drives the corresponding mechanical structure, thereby adjusting the liquid nitrogen discharge volume of the liquid nitrogen storage tank (18).

2. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 1, characterized in that: The liquid nitrogen storage tank (18) comprises a cover body (35), a liquid nitrogen storage box (41) is provided inside the cover body (35), a liquid nitrogen cavity (42) is provided inside the liquid nitrogen storage box (41), and a piston extrusion assembly is installed in the liquid nitrogen cavity (42).

3. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 2, characterized in that: The pressure sensing assembly (20) includes a middle shell (37), a pressure stabilizing chamber (46) is provided in the middle shell (37), side slide grooves (47) are fixedly installed on the inner walls of both sides of the pressure stabilizing chamber (46), a dynamic pressure sensing assembly is slidably provided in the side slide grooves (47), and a reset spring (50) is connected between the dynamic pressure sensing assembly and the bottom of the cover body (35).

4. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 3, characterized in that: The fluid pressurizing component (19) includes a flexible fluid sac (39), the flexible fluid sac (39) is made of silicone rubber, the interior of the flexible fluid sac (39) is filled with edible-grade gelatin (52), and the upper plane of the flexible fluid sac (39) is connected to the pressure-stabilizing chamber (46).

5. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 4, characterized in that: A sealing frame (38) is fixedly mounted on the outside of the flexible fluid sac (39), and a liquid spraying device (40) is fixedly mounted on the four inner corners of the sealing frame (38). The liquid spraying device (40) includes a lower spraying device (58) and an upper spraying device (59) for realizing a liquid nitrogen spraying angle by utilizing friction.

6. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 5, characterized in that: The liquid spraying device (40) includes an end pipe (53), the end pipe (53) is connected to the nitrogen exhaust pipe (45) to form a liquid spraying cavity (60), and the lower end of the end pipe (53) is fixedly connected to a membrane breaking head (51); The lower spray position device (58) includes an arcuate groove (54), which is arranged on the side wall of the end pipe (53). A central rotating shaft (55) is provided on the side wall of the end pipe (53). A rotating wheel (56) and a belt (57) are rotatably provided on the surface of the central rotating shaft (55), and the belt (57) is arranged on the outside of the rotating wheel (56).

7. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 6, characterized in that: A nitrogen spray assembly (66) is provided on one side of the end pipe (53) close to the flexible fluid bag (39), and the nitrogen spray assembly (66) includes a nozzle (61). The upper and lower side walls of the nozzle (61) are both provided with a limit shaft (62). The limit shafts (62) of the upper and lower side walls are rotatably mounted with an upper swing piece (63) and a lower swing piece (65). A direct spray head (64) is fixedly mounted between the limit shaft (62) and the lower swing piece (65), and the limit shaft (62) is connected to the belt (57).

8. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 7, characterized in that: The evacuation box assembly (16) comprises an evacuation box body (21), wherein an article placement partition (22) is placed inside the evacuation box body (21); A lower partition (23) and an upper partition (24) are provided inside the nitrogen filling case (11), and the lower partition (23) is connected to the inner wall of the nitrogen filling case (11) to form an equipment chamber (25). A PSA nitrogen generator (26) and a vacuum pump (27) are installed inside the equipment chamber (25). The PSA nitrogen generator (26) is arranged on the right side of the vacuum pump (27). The output end of the PSA nitrogen generator (26) is fixedly connected to a nitrogen generating pipe (28), and the nitrogen generating pipe (28) is communicated with the interior of the liquid nitrogen chamber (42). The output end of the vacuum pump (27) is provided with a vacuum pump (29), and the vacuum pump (29) is communicated with the interior of the evacuated box body (21).

9. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 8, characterized in that: A first slider (36) is provided on the outer side of the cover (35), and a lifting backboard assembly (17) is fixedly installed on the desktop of the nitrogen-filled chassis (11). The lifting backboard assembly (17) includes a mounting backboard (33), and an inner slide groove (34) is provided on the front side of the mounting backboard (33). The first slider (36) slides in the inner slide groove (34); The upper partition (24) is connected to the inner wall of the nitrogen filling case (11) to form an upper box body (30). A double-head telescopic motor (31) is installed in the upper box body (30), and an output end of the double-head telescopic motor (31) is connected to the first slider (36).

10. The integrated equipment for nitrogen-filled body-fitting vacuum packaging of food according to claim 9, characterized in that: An external bracket (13) is fixedly connected to the outside of the desktop of the nitrogen filling case (11), a film (14) is installed on the external bracket (13), and a control button (12) is installed on the outside of the nitrogen filling case (11).

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