Vacuum sealing machine

Abstract

The utility model discloses a vacuum sealing machine which comprises a base, an air exhaust hole is formed in the base, and the air exhaust hole penetrates through the lower wall of the base. The water tank assembly is located on the upper surface of the base, an air inlet part and an air outlet part are arranged on the water tank assembly, an air inlet channel of the air inlet part is communicated with the air exhaust hole, and the ends, located in the water tank assembly, of the air inlet part and the air outlet part are higher than the midpoint, perpendicular to the upper surface of the base, of the water tank assembly; the air exhaust assembly is provided with an air inlet, the air inlet is communicated with the air outlet channel of the air outlet part, and the air exhaust assembly is used for generating negative pressure; the turning cover is rotationally connected to the side, away from the air exhaust assembly, of the base, and the turning cover rotates between an unfolding position and a closing position; and a heat sealing piece is arranged on the side, away from the rotating connecting side, of the lower surface of the base and used for heating the bag opening, through the arrangement of the structure, gas-liquid separation can be effectively conducted, and liquid suck-back in the gas exhaust process is prevented.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to a vacuum sealing machine. Background Technology

[0002] Vacuum sealing machines are widely used in modern life. Whether it's food preservation or pharmaceutical storage, vacuum sealing machines are indispensable for sealing and preserving items to extend their shelf life and prevent them from getting damp, oxidized, or affected by other environmental factors.

[0003] Currently, most vacuum sealing machines on the market simply extract air directly from the item using an air extraction component. They lack effective gas-liquid separation measures during the extraction process. This means that when sealing items containing liquid or prone to liquid generation, the liquid is easily sucked into the extraction component, causing damage. This not only increases equipment maintenance costs and downtime but also reduces production efficiency. For example, when vacuum packaging foods with a lot of liquid, frequent liquid backflow severely affects the normal operation of the vacuum sealing machine.

[0004] Therefore, this utility model provides a vacuum sealing machine that can effectively solve the above problems. It can effectively separate gas and liquid and prevent liquid backflow during the gas extraction process. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a vacuum sealing machine that can effectively separate gas and liquid and prevent liquid backflow during the gas extraction process.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A vacuum sealing machine, comprising:

[0008] A base, wherein the base is provided with an air extraction hole that penetrates the lower wall of the base;

[0009] A water tank assembly is located on the upper surface of the base, and the water tank assembly is provided with an air inlet and an air outlet. The air inlet channel of the air inlet is connected to the air extraction hole. The ends of the air inlet and the air outlet located inside the water tank assembly are both higher than the midpoint of the water tank assembly in the direction perpendicular to the upper surface of the base.

[0010] An air extraction assembly is provided with an air inlet, which is connected to the air outlet channel of the air outlet section. The air extraction assembly is used to generate negative pressure.

[0011] A flip cover is rotatably connected to the base on the side opposite to the air extraction assembly, and the flip cover rotates between an open position and a closed position; a heat seal is provided on the lower surface of the base away from the rotatable connection side, and the heat seal is used to heat the bag opening.

[0012] As an improvement of this utility model, the water tank assembly includes a tank body and an observation window, the air inlet and the air outlet are disposed on the tank body, and the observation window is connected to the tank body.

[0013] As an improvement of this utility model, the vacuum sealing machine further includes a housing, the housing and the base cooperate to form a first accommodating space, the air extraction component is located in the first accommodating space, and the air extraction component is located on the base.

[0014] As an improvement of this utility model, the base is provided with a multi-way connector, and the air inlet is connected to the air outlet channel of the air outlet through the airflow channel of the multi-way connector.

[0015] As an improvement of this utility model, the vacuum sealing machine further includes an external extraction component, which is connected to the air inlet through the airflow channel of the multi-port connector, and the free end of the external extraction component is located outside the housing; when vacuuming is performed by the external extraction component, the free end of the external extraction component is used to insert into the bag opening.

[0016] As an improvement of this utility model, the box body is provided with a diversion groove, one end of the air inlet located in the water tank is inserted into the diversion groove, and the upper end of the air inlet channel of the air inlet is located in the diversion groove.

[0017] As an improvement of this utility model, the external suction assembly includes an external suction head and an air supply component. The air supply component has a second receiving space, and the airflow channel in the multi-way connector is connected to the second receiving space. The external suction head is detachably connected to the air supply component. When the connecting end of the external suction head is connected to the air supply component, the external suction head is connected to the second receiving space. The free end of the external suction head is located outside the housing, and the free end of the external suction head is used to insert into the bag opening.

[0018] As an improvement of this utility model, the air supply component is provided with a connecting hole, which communicates with the second accommodating space; the second accommodating space is provided with an elastic component and a sealing component connected to the elastic component. When the connecting end of the external tap is detached from the air supply component, the external tap disengages from the connecting hole, and the elastic component drives the sealing component to close the connecting hole. When the connecting end of the external tap is connected to the air supply component, the external tap is inserted into the connecting hole, and the external tap drives the sealing component to disengage from the connecting hole.

[0019] As an improvement of this utility model, the air extraction assembly is provided with an air outlet, and the air inlet is provided with a one-way valve, which is used to make the gas flow in one direction.

[0020] As an improvement of this utility model, the base is further provided with a control component, which is electrically connected to the air extraction component and the heat sealing component.

[0021] The beneficial effects of this utility model are: through the above-mentioned structural design, a vacuum sealing machine is provided, which can effectively separate gas and liquid and prevent liquid backflow during the pumping process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of the vacuum sealing machine of this utility model from one angle;

[0025] Figure 2 This is a schematic diagram of the overall structure of the vacuum sealing machine of this utility model from another angle;

[0026] Figure 3 This is a schematic diagram of the unfolded position of the vacuum sealing machine of this utility model;

[0027] Figure 4 This is an exploded structural diagram of the vacuum sealing machine of this utility model from one angle;

[0028] Figure 5 This is a partial exploded structural diagram of the vacuum sealing machine of this utility model;

[0029] Figure 6 This is a cross-sectional view of the vacuum sealing machine of this utility model at one angle when the external tap is inserted;

[0030] Figure 7 yes Figure 6 Enlarged view of circle A;

[0031] Figure 8 yes Figure 6 Enlarged view of circle B;

[0032] Figure 9 yes Figure 6 Enlarged view of circle C;

[0033] Figure 10 This is a partial cross-sectional view of the vacuum sealing machine of this utility model at one angle when the external tap is inserted;

[0034] Figure 11 This is a partial cross-sectional view of the vacuum sealing machine of this utility model when the external plug is disconnected;

[0035] Figure 12 This is a partial schematic diagram of the vacuum sealing machine of this utility model from one angle;

[0036] Figure 13 This is a partial schematic diagram of the vacuum sealing machine of this utility model from another angle.

[0037] The detailed explanation of the reference numerals in the attached figures is as follows:

[0038] 1. Base; 11. Air extraction port; 12. Heat sealing component; 13. Multi-port connector; 14. Air outlet; 15. Slot; 2. Water tank assembly; 211. Air inlet; 212. Air outlet; 21. Housing; 22. Observation window; 23. Sealing gasket; 213. Diverter groove; 3. Air extraction assembly; 31. Air inlet; 32. Air outlet; 311. One-way valve; 4. Flip cover; 41. Buckle; 42. Cutting component; 43. Pressing groove; 44. Snap-fit ​​part; 5. Housing; 51. First receiving space; 6. External extraction assembly; 61. External tap; 62. Air supply component; 63. Second receiving space; 611. Notch; 621. Connecting hole; 631. Elastic component; 632. Sealing component; 7. Control assembly. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] Reference Figures 1 to 13 A vacuum sealing machine, comprising:

[0046] A base 1, wherein an air extraction hole 11 is provided on the base 1, and the air extraction hole 11 penetrates the lower wall of the base 1;

[0047] Water tank assembly 2, which is located on the upper surface of the base 1, and is provided with an air inlet 211 and an air outlet 212. The air inlet channel of the air inlet 211 is connected to the air extraction hole 11. The ends of the air inlet 211 and the air outlet 212 located inside the water tank assembly 2 are both higher than the midpoint of the water tank assembly 2 in the direction perpendicular to the upper surface of the base 1.

[0048] The air extraction assembly 3 is provided with an air inlet 31, which is connected to the air outlet channel of the air outlet 212. The air extraction assembly 3 is used to generate negative pressure.

[0049] A flip cover 4 is rotatably connected to the base 1 on the side away from the air extraction assembly 3, and the flip cover 4 rotates between the open position and the closed position; a heat seal 12 is provided on the lower surface of the base 1 away from the rotatable connection side, and the heat seal 12 is used to heat the bag opening.

[0050] Through the above-described structure, gas-liquid separation can be effectively achieved, preventing liquid backflow during the evacuation process. Specifically, first, the flip cover 4 is rotated to the unfolded position, and the bag opening is placed on the side of the flip cover 4 near the base 1. Then, the flip cover 4 is rotated to the closed position. At this time, a vacuum chamber is formed between the flip cover 4 and the base 1. The evacuation assembly 3 is activated, and the evacuation assembly 3 generates negative pressure. Gas flows from inside the bag to the vacuum chamber, and then flows into the water tank through the air inlet 211 inserted into the evacuation hole 11. Since the end of the air inlet 31 located inside the water tank assembly 2 is higher than the midpoint of the water tank in the direction perpendicular to the base 1, the liquid in the gas sinks to the bottom of the water tank under the action of gravity. The gas part first flows into the air outlet 212 outlet channel, then into the air inlet 31, and finally into the evacuation assembly 3. Finally, when the evacuation is completed, the bag opening is sealed by heating with the heat sealer 12.

[0051] Preferably, the air extraction component 3 is a vacuum pump, and the heat sealing component 12 is an electric heating strip.

[0052] Preferably, the flip cover 4 is further provided with a pressing groove 43, a buckle 41 and a cutting piece 42 on the side near the base 1. The buckle 41 is provided on the side of the flip cover 4 near the base 1 and is used to press and fix the bag opening. The cutting piece 42 is detachably connected to the side of the flip cover 4 near the base 1 and is used to cut the bag opening after sealing. The pressing groove 43 is provided corresponding to the heating strip.

[0053] Preferably, the base 1 has a slot 15 on the side near the flip cover 4, and the flip cover 4 has a snap-fit ​​part 44 on the side near the base 1. When in the closed position, the snap-fit ​​part 44 is inserted into the slot 15 to achieve closure and form a vacuum cavity.

[0054] In this embodiment, the water tank assembly 2 includes a tank body 21 and an observation window 22. The air inlet 211 and the air outlet 212 are disposed on the tank body 21, and the observation window 22 is connected to the tank body 21.

[0055] With the above-described structure, users can directly observe the water level and presence of impurities in the water tank assembly 2, and empty the water when the water level reaches the preset position. For example, if an abnormal drop in water level is detected during use, it may indicate a leak, allowing users to promptly inspect and repair the machine. If impurities are found in the water, they can be cleaned immediately to prevent them from entering the air system and affecting the suction effect and normal operation of the machine.

[0056] Preferably, the water tank assembly 2 further includes a sealing gasket 23, which is used to seal the observation window 22 to prevent external debris from entering the tank body 21 through the gap between the observation window 22 and the tank body 21, effectively increasing the sealing performance and safety of the water tank.

[0057] Preferably, the observation window 22 is detachably connected to the housing 21. This detachable connection allows users to easily pour water by simply removing the observation window 22, improving user convenience and enhancing the user experience.

[0058] In this embodiment, the vacuum sealing machine further includes a housing 5, which and the base 1 cooperate to form a first accommodating space 51. The air extraction component 3 is located in the first accommodating space 51 and is located on the base 1.

[0059] The enclosed space formed by the housing 5 and the base 1 provides excellent protection for the water tank assembly 2 and the air extraction assembly 3, preventing them from being affected by external factors such as impacts, dust, and moisture. This helps extend the service life of the internal structure, reduces component failures and damage caused by external factors, and improves the reliability and stability of the equipment.

[0060] Preferably, the water tank assembly 2 is detachably connected to the housing 5.

[0061] Preferably, the housing 5 is provided with a receiving chamber, and the water tank assembly 2 is located in the receiving chamber.

[0062] In this embodiment, the base 1 is provided with a multi-way connector 13, and the air inlet 31 is connected to the air outlet channel of the air outlet 212 through the airflow channel of the multi-way connector 13.

[0063] With the above-described structure, during extraction, the gas flows out from the outlet channel of the outlet section 212, flows into the inlet 31 along the airflow channel of the multi-way connector 13, and enters the extraction assembly 3. This allows for branching and integrating of the air path, establishing a flexible connection channel between the extraction assembly 3 and the outlet section 212. Besides connecting the main air path between the extraction assembly 3 and the outlet section 212, other possible air path branches can be easily connected. Furthermore, when components such as the extraction assembly 3 or the outlet section 212 malfunction, the multi-way connector 13 allows these components to be relatively independent in terms of air path connection. Maintenance personnel can more easily disassemble, inspect, and repair individual components without needing to disassemble the entire air path system on a large scale. For example, if the extraction assembly 3 malfunctions, simply disconnecting the multi-way connector 13 from the extraction assembly 3 allows for individual repair of the extraction assembly 3, greatly reducing maintenance difficulty and workload, and also facilitating rapid location of air path faults. Since the multi-port connector 13 is a key connection node in the gas circuit, by inspecting and testing it, it is possible to quickly determine whether the gas circuit fault is on the side of the suction assembly 3, the side of the outlet 212, or the multi-port connector 13 itself, thereby improving the efficiency of fault diagnosis and shortening the maintenance time.

[0064] Preferably, the multi-way connector 13 is a tee connector.

[0065] In this embodiment, the vacuum sealing machine further includes an external extraction component 6, which is connected to the air inlet 31 through the airflow channel of the multi-port connector 13, and the free end of the external extraction component 6 is located outside the housing 5; when vacuuming is performed by the external extraction component 6, the free end of the external extraction component 6 is used to insert into the bag opening.

[0066] With the above-described structure, when the external suction component 6 is used for suction, the gas inside the bag flows in from the free end and then flows to the airflow channel of the multi-way connector 13. It then flows into the air inlet 31 along the airflow channel of the multi-way connector 13 and finally enters the suction component 3 to complete the entire external suction process. For some large packaging bags that cannot be placed inside the vacuum sealer for conventional suction sealing, the external suction component 6 can be directly inserted into the bag opening for suction, meeting the suction needs of packaging of different sizes and shapes, and greatly expanding the application range of the vacuum sealer. At the same time, for some fragile, easily deformable, or irregularly shaped items, the external suction component 6 can be used to suction and seal the packaging bag without placing the item inside the sealer, providing convenience for the packaging of special items.

[0067] Preferably, both the external extraction component 6 and the air extraction component 3 are connected to the multi-port connector 13 via flexible tubing.

[0068] It should be noted that when using the external extraction component 6, the flip cover 4 needs to be in the closed position to form a closed space. The space in the vacuum sealing machine is relatively closed to the outside world, so that the external extraction component 6 can evacuate the gas when it is evacuating, and will not fail to evacuate the vacuum due to the entry of external gas.

[0069] In this embodiment, the housing 21 is provided with a diversion groove 213, and one end of the air inlet 211 located inside the water tank is inserted into the diversion groove 213. The upper end of the air inlet channel of the air inlet 211 is located in the diversion groove 213.

[0070] With the above structure, the diversion channel 213 can divert the gas entering from the air inlet 211, making the gas diffuse more evenly in the water tank, which is beneficial to improving the efficiency of gas-liquid mixing or gas-liquid separation processes in the water tank.

[0071] Preferably, there is a gap between the air inlet 211 and the inner wall of the diversion channel 213. Gas enters the water tank assembly 2 along the gap and flows out from the air outlet 212, while liquid settles on the inner wall of the water tank assembly 2, which enhances the efficiency of gas-liquid separation and prevents the risk of merging.

[0072] Preferably, the diversion groove 213 is an annular groove. The annular groove can effectively guide the airflow, allowing the gas to flow in evenly from the air inlet 211, which facilitates gas-liquid separation.

[0073] In this embodiment, the external drawer assembly 6 includes an external drawer 61 and an air supply component 62. The air supply component 62 has a second accommodating space 63, and the airflow channel in the multi-way connector 13 is connected to the second accommodating space 63. The external drawer 61 is detachably connected to the air supply component 62. When the connecting end of the external drawer 61 is connected to the air supply component 62, the external drawer 61 is connected to the second accommodating space 63. The free end of the external drawer 61 is located outside the housing 5, and the free end of the external drawer 61 is used to insert into the bag opening.

[0074] With the above-described structure, when the suction assembly generates negative pressure, gas flows from the bag through the free end of the outer tap 61, through the connecting end into the second accommodating space 63, then from the second accommodating space 63 into the airflow channel within the multi-way connector 13, and finally into the suction assembly 3 via the air inlet 31. This design allows for easy gripping and operation by the user, enabling them to easily insert the outer tap 61 into the bag opening for suction or delivery. Furthermore, users can select and replace different specifications or shapes of outer taps 61 according to different bag opening sizes, shapes, or packaging requirements, increasing operational flexibility and adjustability for better packaging results. Simultaneously, the detachable outer tap 61 facilitates individual replacement in case of malfunction or damage without replacing the entire outer suction assembly 6, effectively reducing maintenance costs.

[0075] In this embodiment, the air supply component 62 is provided with a connecting hole 621, which communicates with the second accommodating space 63. The second accommodating space 63 is provided with an elastic component 631 and a closing component 632 connected to the elastic component 631. When the connecting end of the external tap 61 is detached from the air supply component 62, the external tap 61 disengages from the connecting hole 621, and the elastic component 631 drives the closing component 632 to close the connecting hole 621. When the connecting end of the external tap 61 is connected to the air supply component 62, the external tap 61 is inserted into the connecting hole 621, and the external tap 61 drives the closing component 632 to disengage from the connecting hole 621.

[0076] With the above-described structure, when the external tap 61 is detached, the elastic element 631 drives the sealing element 632 to automatically seal the connection hole 621, preventing gas leakage, ensuring the airtightness of the gas supply system, maintaining stable gas pressure within the system, and ensuring normal gas supply function. When the external tap 61 is connected, the external tap 61 can smoothly squeeze the elastic element 631 to drive the sealing element 632 to open the connection hole 621, realizing the connection between the external tap 61 and the second accommodating space 63, enabling normal gas supply or extraction operations, ensuring the reliable realization of the function of the external extraction component 6, and also ensuring that even if a misoperation occurs during operation, such as accidentally knocking off the external tap 61, the connection hole 621 will immediately and automatically close, playing a certain safety protection role and improving the safety and reliability of the equipment. Furthermore, since the entire process is completed automatically, users do not need to perform any additional operations to open or close the connection hole 621. They only need to connect or disconnect the external tap 61 from the air supply component 62, and the connection hole 621 will automatically open and close. The operation is simple and convenient, which improves the efficiency of packaging operations, reduces the number of operation steps, and lowers the difficulty of operation for users.

[0077] It should be noted that when the bag opening is placed into the vacuum chamber for evacuation, the connection hole 621 needs to be relatively sealed to prevent external gas from participating in the evacuation process.

[0078] Preferably, the external tap 61 has a notch 611 at one end near the gas delivery member 62, the notch 611 being used to allow gas to flow from the bag into which the external tap 61 is inserted into the second receiving space 63.

[0079] In this embodiment, the air extraction assembly 3 is provided with an air outlet 32, and the air inlet 31 is provided with a one-way valve 311, which is used to make the gas flow in one direction.

[0080] With the above-described structure, when the pumping assembly 3 stops pumping, the one-way valve 311 can quickly close the inlet 31, effectively preventing the pumped gas from flowing back into the pumping system or the pumped space. This ensures that the negative pressure environment formed during the pumping process is maintained, guaranteeing the pumping effect and helping to achieve a higher vacuum. Simultaneously, the presence of the one-way valve 311 makes the pumping process more directional and efficient. During pumping, the gas can flow smoothly from the inlet 31 to the pumping assembly 3, enabling the pumping assembly 3 to work more efficiently, reducing pumping time and improving overall work efficiency; the gas can also be discharged to the outside through the outlet 32.

[0081] Preferably, the air inlet 31 is connected to the multi-port connector 13 via a flexible rubber tube, and the base 1 is provided with an air outlet 14, which is connected to the outside. The air outlet 14 is connected to the air outlet 14 via a flexible rubber tube for exhaust.

[0082] In this embodiment, the base 1 is also provided with a control component 7, which is electrically connected to the air extraction component 3 and the heat seal 12.

[0083] With the above-described structure, the operation of the vacuuming component 3 and the heat sealing component 12 can be easily controlled. For example, the vacuuming component 3 can be precisely set with parameters such as the vacuuming rate and vacuuming time to achieve functions such as spot vacuuming and continuous vacuuming, so as to help users select the appropriate mode according to their needs. The heat sealing component 12 can also be controlled to seal according to the required vacuuming time for single sealing, and it also allows users to freely choose whether to use external vacuuming.

[0084] Preferably, the base 1 is provided with a power source, and the control component 7 is electrically connected to the power source.

[0085] In other embodiments, the control component 7 is provided with a socket for connection to a power source.

[0086] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the protection scope of this utility model.

Claims

1. A vacuum sealing machine, characterized in that, include: A base (1) is provided with an air extraction hole (11) which penetrates the lower wall of the base (1). Water tank assembly (2), the water tank assembly (2) is located on the upper surface of the base (1), and the water tank assembly (2) is provided with an air inlet (211) and an air outlet (212). The air inlet channel of the air inlet (211) is connected to the air extraction hole (11). The ends of the air inlet (211) and the air outlet (212) located inside the water tank assembly (2) are both higher than the midpoint of the water tank assembly (2) in the direction perpendicular to the upper surface of the base (1). The air extraction assembly (3) is provided with an air inlet (31), which is connected to the air outlet channel of the air outlet (212). The air extraction assembly (3) is used to generate negative pressure. A flip cover (4) is rotatably connected to the base (1) on the side away from the air extraction assembly (3), and the flip cover (4) rotates between the open position and the closed position; a heat seal (12) is provided on the lower surface of the base (1) away from the rotatable connection side, and the heat seal (12) is used to heat the bag opening.

2. The vacuum sealing machine according to claim 1, characterized in that, The water tank assembly (2) includes a tank body (21) and an observation window (22). The air inlet (211) and the air outlet (212) are disposed on the tank body (21), and the observation window (22) is connected to the tank body (21).

3. The vacuum sealing machine according to claim 1, characterized in that, The vacuum sealing machine also includes a housing (5), which and the base (1) cooperate to form a first accommodating space (51). The air extraction component (3) is located in the first accommodating space (51) and is located on the base (1).

4. The vacuum sealing machine according to claim 3, characterized in that, The base (1) is provided with a multi-way connector (13), and the air inlet (31) is connected to the air outlet channel of the air outlet (212) through the airflow channel of the multi-way connector (13).

5. The vacuum sealing machine according to claim 4, characterized in that, The vacuum sealing machine also includes an external extraction component (6), which is connected to the air inlet (31) through the airflow channel of the multi-port connector (13), and the free end of the external extraction component (6) is located outside the housing (5); when the external extraction component (6) is used to draw a vacuum, the free end of the external extraction component (6) is used to insert into the bag opening.

6. The vacuum sealing machine according to claim 2, characterized in that, The housing (21) is provided with a diversion groove (213). The air inlet (211) is located inside the water tank and one end is inserted into the diversion groove (213). The upper end of the air inlet channel of the air inlet (211) is located in the diversion groove (213).

7. The vacuum sealing machine according to claim 5, characterized in that, The external drawer assembly (6) includes an external drawer (61) and an air supply component (62). The air supply component (62) has a second accommodating space (63), and the airflow channel in the multi-way connector (13) is connected to the second accommodating space (63). The external drawer (61) is detachably connected to the air supply component (62). When the connecting end of the external drawer (61) is connected to the air supply component (62), the external drawer (61) is connected to the second accommodating space (63). The free end of the external drawer (61) is located outside the housing (5), and the free end of the external drawer (61) is used to insert into the bag opening.

8. The vacuum sealing machine according to claim 7, characterized in that, The air supply component (62) is provided with a connecting hole (621), which is connected to the second accommodating space (63). The second accommodating space (63) is provided with an elastic component (631) and a closing component (632) connected to the elastic component (631). When the connecting end of the external tap (61) is detached from the air supply component (62), the external tap (61) is disengaged from the connecting hole (621), and the elastic component (631) drives the closing component (632) to close the connecting hole (621). When the connecting end of the external tap (61) is connected to the air supply component (62), the external tap (61) is inserted into the connecting hole (621), and the external tap (61) drives the closing component (632) to disengage from the connecting hole (621).

9. The vacuum sealing machine according to claim 1, characterized in that, The air extraction assembly (3) is provided with an air outlet (32), and the air inlet (31) is provided with a one-way valve (311), which is used to make the gas flow in one direction.

10. The vacuum sealing machine according to claim 1, characterized in that, The base (1) is also provided with a control component (7), which is electrically connected to the air extraction component (3) and the heat sealer (12).

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