A modified atmosphere packaging mechanism for improving gas utilization

Abstract

This utility model discloses a modified atmosphere packaging mechanism for improving gas utilization. It includes an upper mold frame, a lower mold frame, a film between them, a lifting cylinder, a vacuum system, and independent upper and lower inflation systems. The core improvement is that the film divides the working chamber into independent upper and lower mold cavities. Compressed air flows through the upper mold cavity, and a mixed gas flows through the lower mold cavity. Independent pressure regulating valves and shut-off valves maintain pressure balance between the two cavities. A filling block is installed inside the lower mold cavity to significantly reduce its ineffective volume. By replacing the mixed gas with compressed air to fill the upper cavity, combined with the reduced volume design of the lower cavity, the amount of mixed gas used is greatly reduced, the utilization rate of the mixed gas is improved, and energy consumption and packaging costs are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of modified atmosphere packaging technology, and in particular to a modified atmosphere packaging device for improving gas utilization. Background Technology

[0002] Modified atmosphere packaging (MAP) is a food preservation technology that replaces the air inside the packaging with a specific mixture of gases (such as nitrogen, carbon dioxide, and oxygen) and locks it in using high-barrier materials. Its core function is to inhibit microbial growth, delay the food's own oxidation and respiration, thereby significantly extending the shelf life of food without relying on chemical preservatives and preserving its color, flavor, texture, and nutritional value to the greatest extent possible. This technology is widely used in fresh meat, poultry, fish, ready-to-eat foods, baked goods, fruit and vegetable salads, and cheese, and is an important industrial means to improve food quality and extend supply. Current MAP technologies mainly focus on improving gas replacement rates and the precision of gas mixing, but they suffer from low gas utilization rates, resulting in significant waste of mixed gases, increased energy consumption, environmental pollution, and higher packaging costs. Summary of the Invention

[0003] The purpose of this invention is to provide a modified atmosphere packaging device that improves gas utilization. During the gas replacement process, an intermediate film is used as a partition to divide the vacuum chamber into two independent spaces: an upper mold cavity and a lower mold cavity. The unused space in the lower mold cavity is filled with solid material. The upper mold cavity is filled with ordinary compressed air, and the lower mold cavity is filled with a mixed gas. After pressure equilibrium is reached, the film is sealed and cut.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A modified atmosphere packaging mechanism for improving gas utilization includes an upper inflation pipe, an upper inflation shut-off valve, an upper inflation pressure regulating valve, an upper mold frame, a film, a lower mold frame, a lower inflation pipe, a lower inflation shut-off valve, a lower inflation pressure regulating valve, a lifting cylinder, a vacuum pipe, a vacuum shut-off valve, a vacuum pump, and a lower mold filling block.

[0006] The lower mold frame moves up and down via a lifting cylinder. The diaphragm passes through the middle of the upper and lower mold frames. The top of the upper mold frame has a buffer spring to reduce impact. The upper mold frame contains a heating plate and a cutting blade, and the lower mold frame contains a mold and a lower mold filling block. The upper mold frame is connected to a compressed air inflation line, which includes a separate pressure regulating valve and a shut-off valve. The lower mold frame is connected to a mixed gas inflation line, which includes a separate pressure regulating valve and a shut-off valve. The upper and lower mold frames are connected to vacuum lines, which include a vacuum pump and a vacuum shut-off valve. The lower mold filling block is fixed inside the lower mold frame by bolts.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: In the process of gas replacement, the modified atmosphere packaging mechanism that improves gas utilization divides the upper and lower mold frames into two independent spaces through a film. The upper mold frame is filled with ordinary compressed air, and the lower mold frame is filled with mixed gas. Separate pressure regulating valves and shut-off valves ensure that the pressure in the two chambers is the same, and the ineffective space of the lower mold frame is filled with solids, thereby significantly reducing the amount of mixed gas used, improving the utilization rate of mixed gas, and reducing energy consumption and packaging costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0009] Figure 2 This is a side view diagram based on the present invention;

[0010] Figure 3 This is a schematic diagram of the lower mold filling according to the present invention;

[0011] Figure 4 This is a schematic diagram of the sealing and cutting mechanism according to this utility model;

[0012] In the diagram: 4. Upper mold frame shock absorber spring; 8. Upper inflation pipe; 7. Upper inflation shut-off valve; 6. Upper inflation pressure regulating valve; 9. Upper mold frame; 10. Membrane; 11. Lower mold frame; 14. Lower inflation pipe; 12. Lower inflation shut-off valve; 13. Lower inflation pressure regulating valve; 5. Lifting cylinder; 3. Vacuum pipe; 2. Vacuum shut-off valve; 1. Vacuum pump; 15. Lower mold filling block; 16. Heating plate cutting mechanism; 17. Mold; Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 As shown, this utility model provides a modified atmosphere packaging mechanism for improving gas utilization, comprising an upper mold frame shock-absorbing spring (4), an upper inflation pipe (8), an upper inflation shut-off valve (7), an upper inflation pressure regulating valve (6), an upper mold frame (9), a film (10), a lower mold frame (11), a lower inflation pipe (14), a lower inflation shut-off valve (12), a lower inflation pressure regulating valve (13), a lifting cylinder (5), a vacuum pipe (3), a vacuum shut-off valve (2), a vacuum pump (1), a lower mold filling block (15), a heating plate cutting mechanism (16), and a mold (17).

[0015] The lower mold frame (11) can move up and down via the lifting cylinder (5). The diaphragm (10) needs to pass between the upper mold frame (9) and the lower mold frame (11). The lower mold frame moves upward via the lifting cylinder (5) and contacts the upper mold frame (9). The upper mold frame shock absorber spring (4) reduces the impact force. During this process, the diaphragm (10) divides the upper mold frame (9) and the lower mold frame (11) into two independent spaces. At this time, the vacuum shut-off valve (2) and the vacuum pump (1) are opened and vacuum is drawn on the upper and lower mold frames. After the preset vacuum degree is reached, the vacuum shut-off valve (2) is closed, and the upper inflation shut-off valve (7) and the lower inflation shut-off valve (12) are opened to inflate the upper mold frame (9) and the lower mold frame (11) respectively. Ordinary compressed air is filled into the upper mold frame (9), and mixed gas is filled into the lower mold frame (11). The upper inflation pressure regulating valve (6) and the lower inflation pressure regulating valve (13) can be adjusted to ensure that the pressure in the upper and lower mold frames is balanced during the inflation process. After reaching the preset pressure value, the upper inflation shut-off valve (7) and the lower inflation shut-off valve (12) are closed. The heating plate cutting mechanism (16) seals the packaged product packaging in the mold (17) and cuts the film. After cutting, the lower mold frame (11) descends back to its initial position. The lower mold filling block (15) is fixed to the lower mold frame (11) with bolts to reduce the non-product space occupied by the lower mold frame (11).

[0016] As can be seen from the above description, the above-described embodiments of this utility model mainly achieve the following technical effects:

[0017] 1. The membrane divides the modified atmosphere chamber into two parts: the upper part is filled with ordinary compressed air, and the lower part is filled with mixed gas, which improves the utilization rate of the mixed gas.

[0018] 2. Filling the unused space in the lower chamber further improves the utilization rate of the mixed gas;

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modified atmosphere packaging mechanism for improving gas utilization, characterized in that... The system includes an upper inflation pipe (8), an upper inflation shut-off valve (7), an upper inflation pressure regulating valve (6), an upper mold frame (9), a membrane (10), a lower mold frame (11), a lower inflation pipe (14), a lower inflation shut-off valve (12), a lower inflation pressure regulating valve (13), a lifting cylinder (5), a vacuum pipe (3), a vacuum shut-off valve (2), a vacuum pump (1), and a lower mold filling block (15). The upper mold frame (9) is connected to the upper inflation pipe (8), and the upper inflation pipe (8) includes the upper inflation shut-off valve (7), an upper inflation valve (6), and an upper inflation pressure regulating valve (6). The pressure regulating valve (6) and the upper inflation pipe (8) are filled with compressed air; the lower mold frame (11) is connected to the lower inflation pipe (14), the lower inflation pipe (14) includes the lower inflation shut-off valve (12) and the lower inflation pressure regulating valve (13), and the lower inflation pipe (14) is filled with mixed gas; the upper mold frame (9) and the lower mold frame (11) are connected to the vacuum pipe (3), the vacuum pipe (3) includes the vacuum shut-off valve (2) and the vacuum pump (1); the diaphragm (10) passes between the upper mold frame (9) and the lower mold frame (11).

2. A modified atmosphere packaging mechanism for improving gas utilization according to claim 1, characterized in that... The lower mold filling block (15) is fixedly connected to the lower mold frame (11).

Images