A method of retrofitting a vacuum packaging machine, a vacuum packaging machine and a method of using the same

Abstract

The application belongs to the technical field of packaging equipment, and discloses a vacuum packaging machine modification method, a vacuum packaging machine and a use method thereof. The vacuum packaging machine modification method comprises the following steps: first, selecting a gas pressure control component and / or a flow control component which are suitable for the specification of the vacuum packaging machine to be modified; and then, installing the gas pressure control component and / or the flow control component on a gas pipeline. The gas pressure control component can adjust the pressure in the gas pipeline, and the flow control component can adjust the gas flow in the gas pipeline. By only adding the gas pressure control component and / or the flow control component on the gas pipeline, the vacuum packaging machine without gas pressure adjustment capability can be modified into a vacuum packaging machine capable of adjusting the vacuumization pressure, the use demand can be met without replacing a new vacuum packaging machine, and the packaging cost of the product to be packaged can be reduced.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a method for modifying a vacuum packaging machine, a vacuum packaging machine, and its usage. Background Technology

[0002] Vacuum packaging machines can automatically extract air from packaging bags and seal them after reaching a predetermined vacuum level. They are widely used in industries such as food, medicine, daily chemicals, hardware, lighting, and furniture to achieve long-term preservation.

[0003] Some existing vacuum packaging machines have limited functionality, only controlling the extraction time and lacking the ability to control the air pressure at the sealing point. This is especially problematic when packaging easily deformable items such as plastic bottles. Simply controlling the extraction time is insufficient to achieve the appropriate air pressure within the bag, leading to deformation of the items due to low pressure or preventing the items from being in a completely vacuum environment, thus affecting the packaging effect. Replacing these vacuum packaging machines with those featuring air pressure control would be costly.

[0004] Therefore, there is an urgent need for a method to modify a vacuum packaging machine, a vacuum packaging machine and its usage, in order to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method for modifying a vacuum packaging machine, a vacuum packaging machine and its usage, which allows the modified vacuum packaging machine to have the function of controlling air pressure without replacing the original vacuum packaging machine, thereby reducing the packaging cost of the products to be packaged.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In the first aspect, a method for modifying a vacuum packaging machine is provided. The vacuum packaging machine includes a vacuum generator and a sealing mechanism, and a gas pipeline is connected between the sealing mechanism and the vacuum generator.

[0008] The method for modifying a vacuum packaging machine includes the following steps:

[0009] Select pressure control components and / or flow control components that are compatible with the specifications of the vacuum packaging machine to be modified;

[0010] Install pressure control and / or flow control components on the gas pipeline;

[0011] The pressure control component is configured to regulate the pressure in the gas pipeline, and the flow control component is configured to regulate the gas flow rate in the gas pipeline.

[0012] Optionally, appropriate pressure control components and flow control components can be selected according to the specifications of the vacuum packaging machine to be modified, and the pressure control components and flow control components can be arranged in series on the gas pipeline.

[0013] Secondly, a vacuum packaging machine is provided, modified using the aforementioned vacuum packaging machine modification method, including:

[0014] The machine body has a control panel, which has a time adjustment key configured to adjust the vacuuming time of the vacuum packaging machine.

[0015] The packaging mechanism is located on the machine body and is used to package the product to be packaged.

[0016] The vacuum generator is located inside the machine body;

[0017] The gas pipeline has one end connected to the sealing mechanism and the other end connected to the vacuum generator.

[0018] Pressure control and / or flow control are provided in the gas pipeline, wherein the pressure control is configured to regulate the pressure in the gas pipeline and the flow control is configured to regulate the gas flow in the gas pipeline.

[0019] Optionally, the vacuum packaging machine includes a pressure control component and a flow control component. The gas pipeline includes pipeline one, pipeline two and pipeline three. The outlet one of the flow control component is connected to the vacuum generator through pipeline one. The inlet one of the flow control component is connected to the outlet two of the pressure control component through pipeline two. The inlet two of the pressure control component is connected to the sealing mechanism through pipeline three.

[0020] Alternatively, the vacuum packaging machine includes a pressure control component and a flow control component. The gas pipeline includes pipeline one, pipeline two, and pipeline three. The outlet two of the pressure control component is connected to the vacuum generator through pipeline one. The inlet two of the pressure control component is connected to the outlet one of the flow control component through pipeline two. The inlet one of the flow control component is connected to the sealing mechanism through pipeline three.

[0021] Optionally, the vacuum packaging machine includes a pressure control component, and the gas pipeline includes pipeline four and pipeline five. The outlet two of the pressure control component is connected to the vacuum generator through pipeline four, and the inlet two of the pressure control component is connected to the sealing mechanism through pipeline five.

[0022] Alternatively, the vacuum packaging machine includes a flow control component, and the gas pipeline includes pipeline four and pipeline five. The outlet of the flow control component is connected to the vacuum generator through pipeline four, and the inlet of the flow control component is connected to the sealing mechanism through pipeline five.

[0023] Optionally, the packaging mechanism includes a first pressing component, a second pressing component, and a vacuum nozzle. The first pressing component and the second pressing component are used to press the opening of the packaging bag of the product to be packaged. A vacuum chamber is formed between the first pressing component and the second pressing component. One end of the vacuum nozzle is connected to the vacuum chamber, and the other end is connected to a gas pipeline.

[0024] Optionally, the flow control device includes a manual flow control valve or an electric flow control valve.

[0025] Optionally, the pneumatic control device includes a straight-through pneumatic regulating valve, an angle pneumatic regulating valve, a diaphragm pneumatic regulating valve, or a piston pneumatic regulating valve.

[0026] Thirdly, a method for using a vacuum packaging machine is provided, which includes the following steps for packaging products using the aforementioned vacuum packaging machine:

[0027] S1. Adjust the opening of the air pressure control component and / or the opening of the flow control component to adjust the vacuuming time of the vacuum packaging machine so that the vacuuming pressure of the vacuum packaging machine meets the preset requirements.

[0028] S2. Place the opening of the packaging bag containing the product to be packaged at the sealing mechanism;

[0029] S3. Turn on the vacuum packaging machine to seal the packaging bag through the sealing mechanism.

[0030] Optionally, in step S1, the vacuuming time, the opening degree of the pressure control component and / or the opening degree of the flow control component are determined according to the pressure resistance of the product to be packaged and the specifications of the packaging bag.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] This invention provides a method for modifying a vacuum packaging machine, the vacuum packaging machine itself, and its usage. By simply adding a pressure control component and / or a flow control component to the gas pipeline, a vacuum packaging machine lacking pressure regulation capability can be modified to have adjustable vacuum pressure. This eliminates the need to replace the entire vacuum packaging machine, meeting usage requirements and reducing packaging costs. Specifically, because the gas pipeline is connected to the packaging mechanism, the pressure control component regulates the pressure within the gas pipeline, thus adjusting the pressure at the packaging mechanism. This allows the modified vacuum packaging machine to adjust the vacuuming pressure, giving it pressure control functionality. The modified vacuum packaging machine extracts a fixed amount of gas per second. The flow control component controls the flow rate of gas passing through the gas pipeline per unit time, thus controlling the flow rate through the packaging mechanism per unit time. This allows the modified vacuum packaging machine to adjust the amount of gas extracted per unit time. Therefore, the modified vacuum packaging machine can adjust the amount of gas extracted by adjusting the vacuuming time, indirectly giving it pressure control functionality. When equipped with both pressure control and flow control components, the modified vacuum packaging machine can control the vacuuming pressure by controlling both pressure and flow rate, making it easier to control the vacuuming pressure. Attached Figure Description

[0033] Figure 1 This is a flowchart of the vacuum packaging machine modification method provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the vacuum packaging machine before modification provided by the present invention;

[0035] Figure 3 This is a schematic diagram of the vacuum packaging machine provided by the present invention. Figure 1 ;

[0036] Figure 4 This is a schematic diagram of the vacuum packaging machine provided by the present invention. Figure 2 ;

[0037] Figure 5 This is a schematic diagram of the vacuum packaging machine provided by the present invention. Figure 3 ;

[0038] Figure 6 This is a schematic diagram of the vacuum packaging machine provided by the present invention. Figure 4 ;

[0039] Figure 7 This is a flowchart of the method of using the vacuum packaging machine provided by the present invention. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] Example 1

[0045] like Figures 1 to 6 As shown, this embodiment provides a method for modifying a vacuum packaging machine, which allows the modified vacuum packaging machine to have the function of controlling air pressure without replacing the original vacuum packaging machine.

[0046] See Figure 2 A vacuum packaging machine includes a vacuum generator and a sealing mechanism, with a gas pipeline connecting the sealing mechanism and the vacuum generator. (See also...) Figure 1 The vacuum packaging machine modification method provided in this embodiment includes the following steps:

[0047] Select pressure control components and / or flow control components that are compatible with the specifications of the vacuum packaging machine to be modified;

[0048] Install pressure control and / or flow control components on the gas line.

[0049] The pressure control component is configured to regulate the pressure in the gas pipeline, and the flow control component is configured to regulate the gas flow rate in the gas pipeline.

[0050] The vacuum packaging machine modification method provided in this embodiment only requires adding a pressure control component and / or a flow control component to the gas pipeline. This allows a vacuum packaging machine without pressure regulation capabilities to be modified into one that can adjust the vacuum pumping pressure, meeting usage requirements without replacing the entire machine and reducing the packaging cost of the products to be packaged. Specifically, because the gas pipeline is connected to the packaging mechanism for the products to be packaged, the pressure control component can regulate the gas pressure within the gas pipeline, thus regulating the gas pressure at the packaging mechanism. This allows the modified vacuum packaging machine to adjust the vacuuming pressure, giving it a pressure control function. The modified vacuum packaging machine extracts a fixed amount of gas per second. The flow control component can control the flow rate of gas passing through the gas pipeline per unit time, thus controlling the flow rate of gas passing through the packaging mechanism per unit time. This allows the modified vacuum packaging machine to adjust the amount of gas extracted per unit time. Therefore, the modified vacuum packaging machine can adjust the amount of gas extracted by adjusting the vacuuming time, indirectly giving it a pressure control function. When equipped with both pressure control and flow control components, the modified vacuum packaging machine can control the vacuuming pressure by controlling both pressure and flow rate, making it easier to control the vacuuming pressure.

[0051] Specifically, when selecting pressure control components and flow control components, it is necessary to determine the range of pressure regulation by the pressure control component and the range of flow regulation by the flow control component based on parameters such as the pressure range that the vacuum generator can achieve, the air flow rate extracted by the vacuum generator per unit time, the air flow rate out of the vacuum generator per unit time, and the vacuuming time range of the vacuum packaging machine, and then select appropriate pressure control components and / or flow control components.

[0052] When installing pressure control components and / or flow control components on a gas pipeline, they can be installed either by replacing one section of the gas pipeline with multiple sections, or by cutting the original gas pipeline into multiple sections and installing the pressure control components and / or flow control components at the cut-off points of each section.

[0053] In a first alternative embodiment, see [reference] Figure 3 and Figure 4 According to the specifications of the vacuum packaging machine to be modified, select the appropriate pressure control components and flow control components, and arrange the pressure control components and flow control components in series on the gas pipeline. This allows the modified vacuum packaging machine to control both the gas pressure in the gas pipeline and the gas flow rate in the gas pipeline, making it easier to control the pressure of the vacuum packaging machine during vacuuming.

[0054] Furthermore, when installing pressure and flow control components, there is no need to restrict the order in which they are installed on the gas pipeline or their position on the gas pipeline.

[0055] In this embodiment, the product to be packaged is a plastic bottle. Before the modification, the vacuum packaging machine reached a vacuum pressure of -0.1 MPa 2 seconds after it was turned on, and the plastic bottle deformed under this pressure. After the modification, by adjusting the opening of the pressure control component and the flow control component, the vacuum packaging machine can reach a vacuum pressure of 0.3 MPa 10 seconds after it is turned on. The plastic bottle will not deform under this pressure, and this pressure meets the requirements for vacuum packaging the plastic bottle.

[0056] In the second alternative embodiment, see Figure 5 Only a flow control component is installed, enabling the vacuum packaging machine to control the vacuuming pressure by controlling the gas flow rate in the gas pipeline. The flow control component is easy to install and has low installation cost. Specifically, by adjusting the gas flow rate in the gas pipeline and the vacuuming time, the total amount of gas extracted by the vacuum packaging machine can be controlled, allowing the vacuum packaging machine to control the gas pressure by controlling the amount of gas extracted.

[0057] In a third alternative embodiment, see Figure 6 Only the air pressure control component is installed, which allows the vacuum packaging machine to control the vacuuming pressure more intuitively by controlling the air pressure in the gas pipeline. The controlled air pressure value is more accurate, and the air pressure control component is easy to install and has low installation cost.

[0058] Specifically, the air pressure control component includes an air pressure sensing element connected by a signal and a regulating valve. The air pressure sensing element can accurately sense the air pressure value in the gas pipeline. When the air pressure sensing element detects that the air pressure value in the gas pipeline is the set air pressure value, the air pressure sensing element will send a signal to the regulating valve, and the regulating valve will tighten to reduce the gas flow in the gas pipeline and prevent the vacuum pressure of the vacuum packaging machine from continuing to decrease.

[0059] Example 2

[0060] See Figures 3 to 6 This embodiment provides a vacuum packaging machine, which is modified using the vacuum packaging machine modification method in Embodiment 1, and has the function of adjusting the vacuum air pressure.

[0061] The vacuum packaging machine provided in this embodiment includes a machine body, a sealing mechanism, a vacuum generator, a gas pipeline, a pressure control component, and / or a flow control component. The machine body is equipped with a control panel, which includes a time adjustment key configured to adjust the vacuuming time of the vacuum packaging machine. The sealing mechanism is located within the machine body and is used to seal the product to be packaged. The vacuum generator is located within the machine body. One end of the gas pipeline is connected to the sealing mechanism, and the other end is connected to the vacuum generator. The pressure control component and / or flow control component are located within the gas pipeline; the pressure control component is configured to adjust the pressure within the gas pipeline, and the flow control component is configured to adjust the gas flow rate within the gas pipeline.

[0062] The vacuum packaging machine provided in this embodiment can adjust the pressure and / or flow rate in the gas pipeline through a pressure control component and / or a flow control component, thereby adjusting the vacuuming pressure by adjusting the vacuuming time, the pressure in the gas pipeline, and / or the flow rate in the gas pipeline.

[0063] For example, the vacuum generator is a vacuum pump and the gas pipeline is a gas pipe.

[0064] In a first alternative embodiment, see [reference] Figure 3 and Figure 4 The vacuum packaging machine includes pressure control components and flow control components. The gas pipeline includes pipeline one, pipeline two, and pipeline three. The pressure control components and flow control components are installed in the gas pipeline in two ways:

[0065] Setup Method 1: See Figure 3 The outlet of the flow control component is connected to the vacuum generator through pipe one, the inlet of the flow control component is connected to the outlet of the pressure control component through pipe two, and the inlet of the pressure control component is connected to the encapsulation mechanism through pipe three.

[0066] Setting Method 2: See below Figure 4 The second outlet of the pressure control component is connected to the vacuum generator through the first pipeline, the second inlet of the pressure control component is connected to the first outlet of the flow control component through the second pipeline, and the first inlet of the flow control component is connected to the packaging mechanism through the third pipeline.

[0067] In the second alternative embodiment, see Figure 5 The vacuum packaging machine only includes a flow control component. The gas pipeline includes pipeline four and pipeline five. The outlet of the flow control component is connected to the vacuum generator through pipeline four, and the inlet of the flow control component is connected to the sealing mechanism through pipeline five, so that the vacuum packaging machine can adjust the vacuum pressure through the flow control component.

[0068] For example, the flow control device includes a manual flow regulating valve or an electric flow regulating valve, which is easy to operate and convenient to adjust. By adjusting the opening of the manual flow regulating valve or the electric flow regulating valve, the gas flow rate in the gas pipeline can be regulated.

[0069] Furthermore, when the flow control component is an electric flow regulating valve, the electric flow regulating valve needs to be electrically connected to the motor of the vacuum packaging machine or to a power source outside the vacuum packaging machine.

[0070] In a third alternative embodiment, see Figure 6 The vacuum packaging machine only includes a pressure control component. The gas pipeline includes pipeline four and pipeline five. The outlet two of the pressure control component is connected to the vacuum generator through pipeline four, and the inlet two of the pressure control component is connected to the sealing mechanism through pipeline five, so that the vacuum packaging machine can adjust the vacuum pressure through the pressure control component.

[0071] For example, the pressure control device includes a straight-through pressure regulating valve, an angle pressure regulating valve, a diaphragm pressure regulating valve, or a piston pressure regulating valve, which is easy to operate and convenient to adjust. By adjusting the opening degree of the pressure regulating valve, the pressure in the gas pipeline can be regulated.

[0072] Furthermore, a pressure gauge is installed on the pressure control unit to allow for direct observation of the pressure value within the gas pipeline.

[0073] Optionally, the packaging mechanism includes a first pressing component, a second pressing component, and a vacuum nozzle. The first pressing component and the second pressing component are used to press the opening of the packaging bag of the product to be packaged. A vacuum chamber is formed between the first pressing component and the second pressing component. One end of the vacuum nozzle is connected to the vacuum chamber, and the other end is connected to a gas pipeline.

[0074] The opening of the packaging bag containing the product to be packaged is placed between the first pressing component and the second pressing component. When the vacuum generator is working, the gas inside the packaging bag is drawn into the vacuum generator through the vacuum chamber, gas pipeline, pressure control component and / or flow control component, so that a vacuum state is gradually formed inside the packaging bag.

[0075] Furthermore, both the first pressing component and the second pressing component are provided with heat-sealing strips that can be heated, and the heat-sealing strips are located on the side of the first pressing component and the second pressing component facing each other. When the vacuum packaging machine stops vacuuming, the heat-sealing strips can seal the bag opening by heating.

[0076] Example 3

[0077] See Figure 7 This embodiment provides a method for using a vacuum packaging machine. The vacuum packaging machine in Embodiment 2 is used to package products, so that the vacuum pressure of the vacuum packaging machine can seal the packaging bag according to preset requirements.

[0078] The method for using the vacuum packaging machine provided in this embodiment specifically includes the following steps:

[0079] S1. Adjust the opening of the air pressure control component and / or the opening of the flow control component to adjust the vacuuming time of the vacuum packaging machine so that the vacuuming pressure of the vacuum packaging machine meets the preset requirements.

[0080] S2. Place the opening of the packaging bag containing the product to be packaged at the sealing mechanism;

[0081] S3. Turn on the vacuum packaging machine to seal the packaging bag through the sealing mechanism.

[0082] In step S1, the pre-set requirements for vacuuming the vacuum packaging machine must first be determined based on the compressive strength of the product to be packaged and the specifications of the packaging bag. Then, the vacuuming duration, the opening degree of the pressure control component, and / or the opening degree of the flow control component are determined according to the pre-set requirements. The pre-set requirements are the air pressure requirements inside the sealed packaging bag, ensuring that the product vacuum-packed according to the pre-set requirements will not deform and will not be damaged during subsequent transportation. The compressive strength of the product to be packaged is determined based on factors such as the type and material of the product. The specifications of the packaging bag include its size and material.

[0083] In step S2, the opening of the packaging bag containing the product to be packaged is placed in the vacuum cavity between the first pressing component and the second pressing component, and the opening of the packaging bag is pressed tightly by the first pressing component and the second pressing component.

[0084] In step S3, when the set vacuuming time is reached, the vacuum generator will automatically shut off and stop extracting air. At the same time, the opening of the packaging bag will be sealed by the heat of the heat sealing strip, thus completing the packaging bag sealing.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A vacuum packaging machine, characterized in that, It was modified using a vacuum packaging machine modification method. The vacuum packaging machine includes a vacuum generator and a sealing mechanism, and a gas pipeline is connected between the sealing mechanism and the vacuum generator. The method for modifying the vacuum packaging machine includes the following steps: Select pressure control components and / or flow control components that are compatible with the specifications of the vacuum packaging machine to be modified; Install the pressure control component and / or the flow control component into the gas pipeline; The pressure control component is configured to adjust the pressure in the gas pipeline, and the flow control component is configured to adjust the gas flow rate in the gas pipeline. include: The machine body is equipped with a control panel, which is equipped with a time adjustment key configured to adjust the vacuuming time of the vacuum packaging machine. A packaging mechanism is disposed on the machine body, and the packaging mechanism is used to package the product to be packaged. A vacuum generator is installed inside the machine body; A gas pipeline, one end of which is connected to the encapsulation mechanism and the other end of which is connected to the vacuum generator; A pressure control element and / or a flow control element are disposed in the gas pipeline, wherein the pressure control element is configured to regulate the pressure in the gas pipeline and the flow control element is configured to regulate the gas flow rate in the gas pipeline; The vacuum packaging machine includes the pressure control component, the gas pipeline includes pipeline four and pipeline five, the outlet two of the pressure control component is connected to the vacuum generator through pipeline four, and the inlet two of the pressure control component is connected to the packaging mechanism through pipeline five. Alternatively, the vacuum packaging machine may include the flow control component, the gas pipeline may include pipeline four and pipeline five, the outlet of the flow control component may be connected to the vacuum generator through pipeline four, and the inlet of the flow control component may be connected to the packaging mechanism through pipeline five.

2. The vacuum packaging machine according to claim 1, characterized in that, The vacuum packaging machine includes the pressure control component and the flow control component. The gas pipeline includes pipeline one, pipeline two and pipeline three. The outlet one of the flow control component is connected to the vacuum generator through pipeline one. The inlet one of the flow control component is connected to the outlet two of the pressure control component through pipeline two. The inlet two of the pressure control component is connected to the packaging mechanism through pipeline three. Alternatively, the vacuum packaging machine includes the pressure control component and the flow control component, the gas pipeline includes pipeline one, pipeline two and pipeline three, the outlet two of the pressure control component is connected to the vacuum generator through pipeline one, the inlet two of the pressure control component is connected to the outlet one of the flow control component through pipeline two, and the inlet one of the flow control component is connected to the packaging mechanism through pipeline three.

3. The vacuum packaging machine according to claim 1, characterized in that, The packaging mechanism includes a first pressing component, a second pressing component, and a vacuum nozzle. The first pressing component and the second pressing component are used to press the opening of the packaging bag of the product to be packaged. A vacuum chamber is formed between the first pressing component and the second pressing component. One end of the vacuum nozzle is connected to the vacuum chamber, and the other end is connected to the gas pipeline.

4. The vacuum packaging machine according to any one of claims 1-3, characterized in that, The flow control device includes a manual flow regulating valve or an electric flow regulating valve.

5. The vacuum packaging machine according to any one of claims 1-3, characterized in that, The pneumatic control components include straight-through pneumatic regulating valves, angle pneumatic regulating valves, diaphragm pneumatic regulating valves, or piston pneumatic regulating valves.

6. The vacuum packaging machine according to claim 1, characterized in that, Select appropriate pressure control components and flow control components according to the specifications of the vacuum packaging machine to be modified, and arrange the pressure control components and flow control components in series on the gas pipeline.

7. A method of using a vacuum packaging machine, characterized in that, Packaging the product to be packaged using the vacuum packaging machine as described in any one of claims 1-6 specifically includes the following steps: S1. Adjust the opening degree of the air pressure control component and / or adjust the opening degree of the flow control component to adjust the vacuuming time of the vacuum packaging machine so that the vacuuming pressure of the vacuum packaging machine meets the preset requirements. S2. Place the opening of the packaging bag containing the product to be packaged at the sealing mechanism; S3. Turn on the vacuum packaging machine to seal the packaging bag through the sealing mechanism.

8. The method of using the vacuum packaging machine according to claim 7, characterized in that, In step S1, the vacuuming time, the opening degree of the pressure control component, and / or the opening degree of the flow control component are determined based on the pressure resistance of the product to be packaged and the specifications of the packaging bag.

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