Double-gas-path control system of vacuum packaging machine

Abstract

The utility model discloses a double gas circuit control system of a vacuum packaging machine, which relates to the technical field of vacuum packaging machines, and comprises a seat body and a cover part, a vacuum cavity is concavely arranged on the top surface of the seat body, the cover part is hinged to one side of the seat body, the cover part can cover the seat body to enable the vacuum cavity to be in a closed state, and a heating assembly is arranged at the covering position of the cover part and the seat body. Comprising a first air path control system and a second air path control system, the first air path control system can drive the cover piece to cover the base so that the vacuum cavity can be in a closed state, and the second air path control system can pump air in the vacuum cavity. By arranging the control system, the sealing position of the packaging bag can be sealed through the cooperation of the first air cylinder assembly and the second air cylinder assembly, then vacuumizing is carried out through the second motor pump, meanwhile, deflation is carried out through the second pressure release valve, and therefore air pressure balance is kept between the vacuum cavity and the packaging bag, and liquid in the packaging bag is prevented from moving; and the sealing quality problem is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum packaging machines, in particular to a double-air-path control system for vacuum packaging machines. Background Art

[0002] Vacuum packaging machines are often used in the packaging industry. These machines automatically extract air from the bag, achieving a desired vacuum level before sealing. They can also refill with nitrogen or other mixed gases before sealing. Vacuum packaging machines are often used in the food industry because vacuum packaging protects food from oxidation, allowing for long-term preservation.

[0003] For example, an air circuit control device for a vacuum packaging machine disclosed in the authorization announcement number CN217533364U starts the motor pump B through the main board to evacuate air, which is connected to the first cylinder assembly and the second cylinder assembly through the air pipe to achieve a sealed vacuum chamber; then the motor pump A is started through the main board to evacuate the vacuum chamber. At the same time, the main board is also connected to an air pressure detection assembly. When the required vacuum degree is achieved inside the vacuum chamber, the vacuuming is stopped. At the same time, the main board controls the heating assembly to heat and seal. After hot pressing and sealing, the main board controls the pressure relief valve to open, and external air will enter the cylinder assembly and the vacuum chamber to achieve the opening function. The entire action does not require manual control and is easy to operate.

[0004] However, when vacuuming, motor pump A and motor pump B are in continuous working state. As a result, when there are wet or liquid items inside the packaging bag, the liquid water droplets or water stains adhering to the inside of the packaging bag are likely to flow with the discharge of gas. When they flow to the sealing position of the packaging bag, due to the hot pressure sealing of the heating component, heat loss is likely to occur, resulting in a loose seal. For this reason, we propose a dual air path control system for vacuum packaging machines. Utility Model Content

[0005] The purpose of the utility model is to provide a dual-air-circuit control system for a vacuum packaging machine. By setting up the control system, the sealing portion of the packaging bag can be sealed by cooperating with the first cylinder assembly and the second cylinder assembly, and then vacuum is drawn by the second motor pump, while the air is released with the help of the second pressure relief valve, so as to maintain the air pressure balance between the vacuum chamber and the packaging bag, and prevent the liquid in the packaging bag from flowing to one side of the vacuum chamber, resulting in sealing quality problems.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dual air path control system for a vacuum packaging machine, comprising a base body and a cover member, a vacuum chamber recessed in the top surface of the base body, the cover member hinged to one side of the base body, the cover member can cover the base body to make the vacuum chamber in a sealed state, a heating component is provided at the covering portion of the cover member and the base body, comprising a first air path control system and a second air path control system, the first air path control system can drive the cover member to cover the base body to make the vacuum chamber in a sealed state, the second air path control system can extract air from the vacuum chamber, the first air path control system is connected to a first pressure relief valve, and the second air path control system is connected to a second pressure relief valve.

[0007] Preferably, the first air path control system includes a cylinder assembly arranged on the base body, the output end of the cylinder assembly is provided with a lock, and the cover member is provided with a hook that cooperates with the lock on the side facing the base body. The output end of the cylinder assembly can drive the lock to act on the hook to make the cover member cover the base body, so that the vacuum chamber is in a closed state.

[0008] Preferably, the first air circuit control system includes a first motor pump, and the first motor pump is connected to the cylinder assembly.

[0009] Preferably, it includes a three-way connector, and the three interfaces of the three-way connector are respectively connected to the first motor pump, the first pressure relief valve, and the cylinder assembly.

[0010] Preferably, the second air path control system includes a second motor pump, and the second motor pump is connected to the vacuum chamber.

[0011] Preferably, the second air path control system includes an external valve assembly.

[0012] Preferably, it includes a control main board, on which an air pressure detection component is provided, and the second air path control system includes a four-way connector, and the four interfaces of the four-way connector are respectively connected to the air pressure detection component, the external valve component, the vacuum chamber, and the second pressure relief valve.

[0013] The technical effects and advantages of this utility model are:

[0014] The first motor pump operates to pump air, causing the first and second cylinder assemblies to move, allowing the latch to fasten the cover and the base, thereby sealing the vacuum chamber. The second motor pump then begins to operate, evacuating the vacuum chamber and the interior of the packaging bag. The air pressure detection assembly on the mainboard then provides feedback on the air pressure within the vacuum chamber until it reaches a preset level. The heating assembly is then controlled to heat-seal the bag opening, while the second pressure relief valve begins to deflate air moderately, achieving relative pressure equilibrium between the vacuum chamber and the interior of the bag. This prevents liquid from flowing toward the vacuum chamber, causing heat loss at the seal. Once the heating assembly has completed sealing, the first and second pressure relief valves are fully deflated, completing the opening function. This design can be used for wet or liquid packaging, preventing liquid from flowing toward the vacuum chamber, causing heat loss at the seal and potentially causing a loose seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the control system of the utility model.

[0016] In the figure: 1. First cylinder assembly; 2. External valve assembly; 3. Four-way valve; 4. Main board; 5. First motor pump; 6. Second cylinder assembly; 7. Second pump; 8. Three-way valve; 9. Second pressure relief valve; 10. Vacuum chamber; 11. First pressure relief valve. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The utility model provides Figure 1 The dual air path control system of a vacuum packaging machine shown in the figure includes a base body and a cover. A vacuum chamber 10 is recessed in the top surface of the base body. The cover is hinged to one side of the base body. The cover can be covered on the base body to make the vacuum chamber 10 airtight. A heating component is provided at the covering position of the cover and the base body, including a first air path control system and a second air path control system. The first air path control system can drive the cover to cover the base body to make the vacuum chamber 10 airtight. The second air path control system can extract the air in the vacuum chamber 10. The first air path control system is connected to a first pressure relief valve 11, and the second air path control system is connected to a second pressure relief valve 9.

[0019] It should be further explained that the first air path control system includes a cylinder assembly arranged on the base body, the output end of the cylinder assembly is provided with a latch, and the cover is provided with a hook that cooperates with the latch on the side facing the base body. The output end of the cylinder assembly can drive the latch to act on the hook to make the cover close on the base body, so that the vacuum chamber 10 is in a closed state; the cylinder assembly is composed of a first cylinder assembly 1 and a second cylinder assembly 6, and the latch is driven to move by the extension and contraction of the first cylinder assembly 1 and the second cylinder assembly 6.

[0020] Specifically, the first air circuit control system includes a first motor pump 7, which is connected to the cylinder assembly; the first motor pump 7 and the second motor pump 5 perform air circuit control.

[0021] Specifically, it includes a three-way connector 8 , the three interfaces of which are respectively connected to the first motor pump 7 , the first pressure relief valve 11 , and the cylinder assembly; and pressure is relieved through the first pressure relief valve 11 .

[0022] Specifically, the second gas path control system includes a second motor pump 5 , and the second motor pump 5 is connected to the vacuum chamber 10 .

[0023] Specifically, it includes a control mainboard 4, which is equipped with an air pressure detection component. The second air path control system includes a four-way connector 3, the four interfaces of which are respectively connected to the air pressure detection component, the external valve component 2, the vacuum chamber 10, and the second pressure relief valve 9. By providing the external component 2, other forms of packaging can be vacuumed or inflated through pipes and related devices.

[0024] Working principle of this utility model:

[0025] By placing the part of the packaging bag to be sealed on the vacuum chamber 10, and then through the cooperation of the cover and the base, the bag opening of the packaging bag is pressed between the cover and the base, and the bag opening of the packaging bag is connected to the vacuum chamber 10, and then the first motor pump 7 is operated to pump air, so that the first cylinder assembly 1 and the second cylinder assembly 6 are activated, so that the lock fastens the cover and the base, thereby sealing the vacuum chamber 10, and then the second motor pump 5 starts to work to vacuum the vacuum chamber 10 and the inside of the packaging bag. At this time, the air pressure detection component on the main board 4 feeds back the air pressure in the vacuum chamber 10 until it reaches the preset requirement, and then starts to control the heating component to perform heat pressure sealing on the packaging bag. At the same time, the second pressure relief valve 9 starts to deflate moderately, so that a relative pressure balance is formed between the vacuum chamber 10 and the inside of the packaging bag. To prevent the liquid in the packaging bag from flowing toward the side of the vacuum chamber 10, which would cause heat loss at the sealing point, after the heating component is sealed, the first pressure relief valve 11 and the second pressure relief valve 9 are completely deflated, and the air then enters the first cylinder assembly 1 and the second cylinder assembly 6, thereby completing the opening function, and then the vacuumed packaging bag can be taken out.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-air-path control system for a vacuum packaging machine, comprising a base and a cover, wherein a vacuum chamber (10) is concavely provided in the top surface of the base, the cover is hinged to one side of the base, and the cover can be covered on the base to make the vacuum chamber (10) in a sealed state, and a heating component is provided at the covering portion between the cover and the base, characterized in that: The invention comprises a first air path control system and a second air path control system, wherein the first air path control system can drive the cover to cover the base so that the vacuum chamber (10) is in a sealed state, and the second air path control system can extract the air in the vacuum chamber (10), the first air path control system is connected to a first pressure relief valve (11), and the second air path control system is connected to a second pressure relief valve (9).

2. A dual air path control system for a vacuum packaging machine according to claim 1, characterized in that: The first air path control system comprises a cylinder assembly arranged on a base body, an output end of the cylinder assembly is provided with a latch, and a hook that cooperates with the latch is provided on the side of the cover member facing the base body, and the output end of the cylinder assembly can drive the latch to act on the hook so that the cover member covers the base body, so that the vacuum chamber (10) is in a sealed state.

3. A dual air path control system for a vacuum packaging machine according to claim 2, characterized in that: The first air circuit control system comprises a first motor pump (7), and the first motor pump (7) is connected to the cylinder assembly.

4. A dual air path control system for a vacuum packaging machine according to claim 3, characterized in that: It comprises a three-way connector (8), wherein the three interfaces of the three-way connector (8) are respectively connected to the first motor pump (7), the first pressure relief valve (11), and the cylinder assembly.

5. A dual air path control system for a vacuum packaging machine according to claim 1, characterized in that: The second air path control system comprises a second motor pump (5), and the second motor pump (5) is connected to the vacuum chamber (10).

6. A dual air path control system for a vacuum packaging machine according to claim 5, characterized in that: The second gas path control system comprises an external valve assembly (2).

7. A dual air path control system for a vacuum packaging machine according to claim 6, characterized in that: The invention comprises a control main board (4), wherein an air pressure detection component is provided on the control main board (4), and the second air path control system comprises a four-way connector (3), wherein four interfaces of the four-way connector (3) are respectively connected to the air pressure detection component, the external valve component (2), the vacuum chamber (10), and the second pressure relief valve (9).

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